CN212456326U

CN212456326U - Full-time intelligent management system for oil and gas pipe network

Info

Publication number: CN212456326U
Application number: CN202021851400.0U
Authority: CN
Inventors: 白登平; 张洋
Original assignee: Xi'an Jiude Chuangyi Technology Co ltd
Current assignee: Xi'an Jiude Chuangyi Technology Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-02-02
Anticipated expiration: 2030-08-28

Abstract

The utility model discloses a full-time intelligent management system of an oil gas pipe network, which comprises optical fibers laid between a gas production well head and a gas collecting station or between the gas collecting station and the gas collecting station, or optical fibers laid along a long-distance pipeline, wherein the optical fibers are laid along a gathering pipeline; the gas collecting station is internally provided with a control system, the optical fiber is connected with the control system, and the control system is used for closing an emergency cut-off device arranged on the gathering and transportation pipeline according to alarm data acquired by the optical fiber and repairing or replacing a valve according to the valve fault of the cut-off pipeline. The utility model discloses effectively combine optical fiber detection and the electronic urgent device that cuts of defeated pipeline of collection, in time with defeated pipeline data information of collection or well head data passback control system, control system carries out the analysis through the database to data, gives intelligent management system with information feedback, and after sale guarantee system operation ensures whole system and normally operates the dimension.

Description

Full-time intelligent management system for oil and gas pipe network

Technical Field

The utility model belongs to the technical field of the defeated safety protection of energy collection, concretely relates to oil gas pipe network full-time intelligent management system.

Background

In recent years, along with the gradual development and the improvement of economic level of the modernization of our country, the oil and gas production scale is enlarged day by day, but the accident of oil and gas disasters is frequent due to the lack of reasonable safety management and emergency measures. The large-scale construction project is constructed near the gathering and transportation pipeline, and the gathering and transportation pipeline is invaded. Natural disasters such as landslides or earthquakes cause the gathering lines to break or deform, all with the risk of line leaks. At present, most of long-distance pipelines are manually inspected, the protection means is backward, the pipeline leakage does not have good detection means to find accidents in time, and real-time monitoring cannot be realized. The main control valves of the pipelines are mostly controlled manually, so that the pipelines cannot be turned off in time when a disaster accident occurs, and the disaster position cannot be judged in time, so that the accident control is lagged. The existing SCADA system in the oil field is mainly applied to data acquisition, monitoring control, process control and the like, lacks a database analysis and intelligent management system, and cannot analyze and effectively utilize the acquired data.

The natural gas production well head is produced for a long time and causes the valve to be seriously corroded easily, the valve is internally and externally leaked, the valve rod is broken and the switch is out of control, the large four-way component steel ring is sealed and loses efficacy, the gas transmission pipeline has the threats of leakage, exposure, buried depth change, geological deformation and the like, the normal production of the gas production well head and the gas transmission pipeline is seriously influenced, certain potential safety hazards exist, and the subsequent operation safety is greatly reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil gas pipe network is intelligent management system when full to overcome prior art's defect, the utility model discloses effectively combine fiber detection and defeated pipeline electronic urgent device that cuts of collection, in time with defeated pipeline data information of collection or well head data passback control system, control system passes through the database and analyzes data, gives intelligent management system with information feedback, and after-sale guarantee system operation ensures the normal fortune of whole system and maintains.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a full-time intelligent management system for an oil and gas pipeline network comprises optical fibers laid between a gas production wellhead and a gas collecting station or between the gas collecting station and the gas collecting station, or optical fibers laid along a long-distance pipeline, wherein the optical fibers are laid along a gathering pipeline; the gas collecting station is internally provided with a control system, the optical fiber is connected with the control system, and the control system is used for closing an emergency cut-off device arranged on the gathering and transportation pipeline according to alarm data acquired by the optical fiber and repairing or replacing a valve according to the valve fault of the cut-off pipeline.

Further, the emergency cut-off device comprises a valve body, wherein the high-pressure end of the valve body is connected with an upstream pipeline of a gas pipeline, the low-pressure end of the valve body is connected with a downstream pipeline of the gas pipeline, the valve body is connected with a valve cover, the valve cover is connected with a top cover, the top cover is connected with an upper cover, the upper cover is connected with an installation bottom plate, the installation bottom plate is connected with a motor, a screw nut is inserted into the upper cover through a bearing, an output shaft of the motor is connected with a pinion through a first key, the pinion is meshed with a gearwheel connected with the screw nut, the gearwheel and the screw nut are connected through keys and fixed by a locking nut, a lead screw matched with the screw nut is inserted into the screw nut, the bottom of the lead screw is connected to a sliding sleeve through a rotation preventing support, a sliding block is arranged in the sliding sleeve and connected with a valve rod inserted on the sliding, the closing valve core is located on the inner side of the suspension core, a spring is arranged in the valve seat, a locking cap matched with the valve rod is arranged on the upper portion of the closing valve core, a detection port is formed in the side wall of the top cover, a high-pressure stop valve is connected to the detection port, and a pressure sensor is arranged on the detection port and between the detection port and the high-pressure stop valve.

Further, the motor penetrates through the explosion-proof box and is connected to the mounting bottom plate; the outer side of the screw nut is connected with a handle nut through a second key; the top of the screw nut is connected with a screw protective cap; the valve cover is connected with the valve body through a plurality of high-strength bolts, and a sealing gasket ring is arranged at the joint of the valve cover and the valve body; the mounting bottom plate is connected with a shield capable of protecting the large gear and the small gear; the valve rod penetrates through the top cover, a first sealing ring is arranged at the position, where the top cover penetrates through the top cover, of the valve cover, a second sealing ring is arranged at the position, where the top cover and the valve cover are connected, a third sealing ring is arranged at the position, where the valve seat and the valve body are connected, a fourth sealing ring matched with the valve seat is arranged on the closing valve core, and a fifth sealing ring matched with the closing valve core is arranged at.

Furthermore, when repairing the valve, a valve repairing tool with pressure is adopted, the valve repairing tool with pressure comprises a valve connected to a large four-way flange of a wellhead, the upper part of the valve is connected with a blowout prevention flange B, the upper part of the blowout prevention flange B is connected to a hydraulic cylinder through a hydraulic cylinder short section, a plugging rod is arranged in the hydraulic cylinder in an inserting mode, the upper part of the plugging rod extends out of the hydraulic cylinder, the plugging rod comprises a plugging device, the upper part of the plugging device is connected with a piston rod, a central rod is arranged in a central hole of the plugging device and a central hole of the piston rod in an inserting mode, the free end of the central rod penetrates out of the end part of the;

the blanking plug comprises a sleeve connected with the piston rod, the free end of the sleeve is connected to the sealing rubber cylinder, the free end of the sealing rubber cylinder is fixed through a plug, and the lower end of the central rod is in threaded connection with the plug;

the blowout prevention flange B or the hydraulic cylinder is connected with a centering beam, a piston rod on the upper portion of the plugging rod is connected with a non-releasing beam, two ends of the centering beam and the non-releasing beam are connected through a first upright post and a second upright post respectively, the blowout prevention flange B is provided with an air release valve and a pressure gauge, and the blowout prevention flange B is sealed through combined sealing.

Furthermore, the upper part of the sleeve is connected with a plug connecting rod, the upper part of the plug connecting rod is connected with a plug upper connector, the upper part of the plug upper connector is connected to a piston rod through a movable connecting assembly, a hollow part of the plug upper connector, a hollow part of the movable connecting assembly and a hollow part of the piston rod are provided with a central rod in an inserting mode, a shaft sleeve is installed inside the plug connecting rod, the lower part of the plug connecting rod is connected to the sleeve, the free end of the sleeve is connected to a sealing rubber cylinder, the free end of the sealing rubber cylinder is fixed through a plug, the upper end of the shaft sleeve is connected with the central rod, the lower end of the shaft sleeve is connected with a central shaft, the free end of the central shaft is arranged in the;

the inner part of the connecting rod of the blanking plug is provided with a unthreaded hole, the outer part of the shaft sleeve is provided with a polished rod, and the shaft sleeve is in clearance fit with the connecting rod of the blanking plug;

the movable joint assembly comprises a movable joint connector connected with the upper connector of the blanking plug, the movable joint connector is connected to the movable joint through a pressing cap, a movable joint clamping ring is arranged between the movable joint connector and the pressing cap, and the movable joint is connected with the piston rod;

a first sealing element is arranged between the connecting rod of the blanking plug and the sleeve, and a second sealing element is arranged between the sleeve and the central shaft;

the piston rod is in clearance fit with the central rod;

the first upright post and the righting cross beam and the non-releasing cross beam as well as the second upright post and the righting cross beam and the non-releasing cross beam are fixed through limit nuts.

Further, when the valve is replaced, a pressurized valve replacing tool is adopted to directly replace the valve according to actual conditions, or a pressurized drilling tool is firstly adopted to establish a new operation channel, and then the pressurized valve replacing tool is adopted to replace a fault valve;

the pressurized valve replacing tool comprises a stand column assembly connected to a large four-way flange of a wellhead, the upper portion of the stand column assembly is connected with a plugging rod through a centering cross beam, the plugging rod is inserted into a hydraulic cylinder assembly and comprises a plugging device, the upper portion of the plugging device is connected to a movable connecting assembly through an upper plug connector, the upper portion of the movable connecting assembly is connected with a piston rod, a hollow upper portion of the plugging device, a center hole of the upper plug connector, a center hole of the movable connecting assembly and a center hole of the piston rod are inserted with center rods, the free end of each center rod penetrates out of the end portion of the piston rod, and the end portion of the piston rod is fixed to the center;

the blanking plug comprises a blanking plug connecting rod connected with an upper connector of the blanking plug, a shaft sleeve is arranged in the blanking plug connecting rod, the lower part of the blanking plug connecting rod is connected with a sleeve, the free end of the sleeve is connected to a sealing rubber cylinder, the free end of the sealing rubber cylinder is fixed through a plug, the upper end of the shaft sleeve is connected with a central rod, the lower end of the shaft sleeve is connected with a central shaft, the free end of the central shaft is inserted into central holes of the sleeve, the sealing rubber cylinder and the plug, and the plug is in threaded connection with the;

the hydraulic cylinder assembly comprises a hydraulic cylinder, the lower part of the hydraulic cylinder is connected to a blowout prevention flange B through a hydraulic cylinder short section, the lower part of the blowout prevention flange B is connected to a wellhead large four-way flange through a valve, the lower part of the plugging rod is inserted into the wellhead large four-way flange, and the upper part of the plugging rod penetrates out of the hydraulic cylinder and is connected with the centering cross beam through a groove on the outer side of the piston rod; and the blowout prevention flange B is provided with a vent valve and a pressure gauge and is sealed through combined sealing.

Furthermore, the inner part of the connecting rod of the blanking plug is provided with a unthreaded hole, the outer part of the shaft sleeve is provided with a polished rod, and the shaft sleeve and the connecting rod of the blanking plug are in clearance fit; the piston rod is in clearance fit with the central rod; the vertical column assembly comprises two vertical columns, the bottoms of the two vertical columns are connected with a large four-way flange of the wellhead through vertical column joints, and the upper parts of the two vertical columns are connected with the centering beam in a matched mode; the movable joint assembly comprises a movable joint connector connected with the upper connector of the blanking plug, the movable joint connector is connected to the movable joint through a pressing cap, a movable joint clamping ring is arranged between the movable joint connector and the pressing cap, and the movable joint is connected with the piston rod; a first sealing element is arranged between the plug connecting rod and the sleeve, and a second sealing element is arranged between the sleeve and the central shaft.

Furthermore, the under-pressure drilling tool comprises a blowout prevention flange A fixed on a standby control valve of the valve to be operated, a central drill rod is arranged in the center of the blowout prevention flange A in an inserting mode, V-shaped seals used for sealing the central drill rod are arranged on the upper side and the lower side of the blowout prevention flange A, the bottom of the central drill rod is connected to a drill bit through a centering sleeve, and a drill rod extension rod is connected to the top of the central drill rod;

the upper part of the blowout prevention flange A is connected with a lower centering beam, the middle part of the lower centering beam is inserted with a central drill rod, two ends of the lower centering beam are inserted with stand columns A, the bottom of each stand column A is fixed on a fixed seat of a valve to be drilled, the central drill rod is connected with a non-releasing beam A, the non-releasing beam A is positioned on the upper side of the lower centering beam, the middle part of the non-releasing beam A is inserted with the central drill rod, two ends of the non-releasing beam A are inserted with the stand columns A, and the top of each stand column A is connected with;

the top of the upright post A extension bar is connected with a motor cross beam, two ends of the motor cross beam are fixed with a hydraulic cylinder A, the middle part of the motor cross beam is connected with a motor support, a hydraulic motor is arranged on the motor support, the center of the motor support is provided with a connecting spline and a drill rod conversion shaft, an output shaft of the hydraulic motor is connected to the drill rod conversion shaft through the connecting spline, the lower part of the drill rod conversion shaft is inserted in the center of the motor cross beam, and the bottom of the drill rod conversion shaft is connected with the top of the drill;

and the hydraulic cylinder A and the hydraulic motor are controlled by a hydraulic control console.

Furthermore, an upper sealing groove and a lower sealing groove for mounting a V-shaped seal are arranged in the center of the blowout prevention flange A, a V-shaped sealing ring assembly, a V-shaped compression nut and a sealing packing are sequentially arranged in the sealing groove on the upper side from bottom to top, and a V-shaped sealing ring assembly, a V-shaped compression nut and a sealing packing are sequentially arranged in the sealing groove on the lower side from top to bottom;

the blowout prevention flange A is fixed on a standby control valve of the valve to be operated through 8 stud bolts and matched nuts, a connecting surface is sealed through an octagonal gasket, and a sensor for measuring medium pressure or temperature parameters and a vent valve for medium discharge in the operation process are installed on the blowout prevention flange A;

the lower centering beam consists of a male beam and a female beam, the male beam and the female beam are connected through a stud, the lower centering beam is provided with 3 through holes, the size of the middle through hole is matched with that of a central drill rod and used for penetrating through the central drill rod, the through holes at the left end and the right end are used for installing a left upright post A and a right upright post A, and the lower centering beam is used for centering the blowout-preventing flange A and preventing the blowout-preventing flange A from rotating;

the lower centralizing beam and the non-releasing beam A are both connected with the upright A through an upright A limit nut; a bearing is arranged between the motor cross beam and the drill rod conversion shaft, the motor support is in threaded connection with the motor cross beam, and the motor support is connected with the hydraulic motor through a bolt;

a cooling water injection port communicated with the drill rod lengthening rod and the center of the central drill rod is formed in the motor cross beam;

the drill rod extension bar is connected to the drill rod conversion shaft through threads, the central drill rod is connected with the drill rod extension bar through threads, the centering sleeve is connected with the central drill rod through threads, and the drill bit is connected with the centering sleeve through threads;

a plurality of positioning grooves are formed in the central drill rod and the drill rod extension rod, one positioning groove is used for installing the non-releasing cross beam A, and drill rod protection rings are installed on the other positioning grooves;

and the top of the hydraulic cylinder A is connected with a hydraulic cylinder A beam.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model discloses effectively combine optical fiber detection and the electronic urgent device that cuts of defeated pipeline of collection, in time with defeated pipeline data information of collection or well head data passback control system, control system carries out the analysis through the database to data, gives intelligent management system with information feedback, and after sale guarantee system operation ensures whole system and normally operates the dimension.

Further, when the pipeline needs to be cut off, the control system gives a command to the motor, the motor rotates to drive the pinion, the gearwheel and the lead screw nut to rotate, the lead screw moves downwards, the valve rod is pushed, the valve core is closed to move downwards to the valve seat, the valve core is closed to seal with the valve seat, and the pipeline is cut off; when the pressure sensor detects that the pipeline pressure exceeds or falls below a set value, the control system automatically gives a command to the motor to execute a valve closing action. When the upstream pipeline is suddenly pressurized or the downstream pipeline is suddenly decompressed, the action of a motor is not needed, the sliding block moves downwards in the sliding sleeve to drive the valve rod and the closing valve core to move downwards to the valve, the valve core and the valve seat are closed to seal, and the pipeline is cut off. The utility model discloses not only can carry out remote switch control under the electrified condition, also can surpass the automatic shutoff under the sudden pressure boost of setting value or upper reaches pipeline, the sudden pressure loss condition of pipeline of low reaches at pipeline pressure, reach the purpose of protection natural gas-supply line.

In addition, when the cut-off device needs to be opened to restore the pipeline, the control system gives a command to the motor, the motor rotates to drive the pinion, the gearwheel and the screw nut to rotate, the screw moves upwards to pull the valve rod and the closing valve core to move upwards to a certain distance away from the valve seat, the seal on the closing valve core is separated from the valve seat, and the pipeline airflow channel is opened. In the process, the key point is that secondary lifting is used when the valve core is lifted and closed, when the motor pulls the valve rod to move upwards, the seal between the valve rod and the valve core is firstly pulled open, so that the upstream and downstream air flows open a small channel, after the pressure of the pipeline is balanced for a period of time, the valve core is lifted and closed for the second time, so that the seal between the valve core and the valve seat is separated, the use power of the motor is greatly reduced in the process, the sealing ring at the lower end of the valve rod can be separated from the valve core to close the valve core under the low voltage and the low power, the small air flow channel is formed firstly, and.

Further, repair the valve instrument and adopt to prevent that the flange passes through the pneumatic cylinder nipple joint and is connected with the pneumatic cylinder, reduce on-the-spot assembly and disassembly tools operation, prevent that the flange, the pneumatic cylinder nipple joint, the pneumatic cylinder are all fixed through threaded connection, make the overall stability and the reliability of instrument increase, the utility model discloses a right the crossbeam and fix on the pneumatic cylinder or prevent the flange through spacing draw-in groove, through the fixed crossbeam of not giving up with the hand of spacing nut and stand, the stand is shorter, is difficult to the swing in the course of the work, makes the operation process simple, and is safe, the utility model discloses a pneumatic cylinder, prevent that flange and blocking rod be monolithic connection, make the blocking rod go down the process of jam position simpler, swift, accurate, the flexible operation of blocking rod is more nimble, and repair valve construction cycle is short, and is little to the.

When the device is used, the hydraulic control console controls the hydraulic station to inject oil into the upper cavity of the hydraulic cylinder, the piston rod drives the blanking plug to descend to a specified position, the piston rod is pressed tightly through the fixing nut on the piston rod, then the pressing cap of the central rod is loosened, the central rod moves upwards, the blanking plug is sealed, the sealing rubber cylinder is pressurized for the second time through the upward pulling of the central rod, the sealing rubber cylinder is squeezed, so that the blockage is safer and more reliable, then the air release valve on the blowout prevention flange is opened after the numerical value of the pressure gauge on the blowout prevention flange is stable, the medium in the cavity of the blanking plug is discharged, the; in a plugging state, disassembling a fault valve, repairing a damaged part of the valve, and recovering the valve after the maintenance of the valve is finished; the non-releasing cross beam is detached, the central rod is operated to move upwards, the blocking part is unblocked, then the hydraulic cylinder lower cavity is filled with oil through the hydraulic station until the oil cylinder moves upwards to the top end of the hydraulic cylinder and stops, the hydraulic cylinder can be operated through the hydraulic station to quickly realize that the blanking plug enters the designated position, the field personnel is easy to operate, the blanking plug is operated, the sealing is reliable, the operation time is shortened, the damaged part of the valve is maintained as required, and the working efficiency and the safety are obviously improved.

Furthermore, the valve replacing tool utilizes the effective combination of a hydraulic cylinder, a stand column assembly, a piston rod and a centering beam, a pressure cap of the central rod can control the central rod to ensure that a blanking plug part does not expand when entering a pre-blocking position, the piston rod part is effectively combined through a shaft sleeve, a sheath, a central shaft, a blanking plug connecting rod, a sealing rubber cylinder and the pressure cap of the central rod, a gap is designed between the shaft sleeve and the pressure rod of the blanking plug, after the pressure cap of the central rod is loosened and the blanking plug is subjected to medium pressure, the sealing rubber cylinder can be squeezed by utilizing the natural gas pressure of a well mouth, after the extrusion deformation of the sealing rubber cylinder is stabilized by the natural gas pressure, the central rod can be operated to control the shaft sleeve to; the connecting structure of the central rod, the central shaft and the shaft sleeve can control the shaft sleeve to drive the central shaft to expand or contract the sealing rubber cylinder as required by operating the central rod, and the structure is convenient and stable to operate; the connection of the central rod and the shaft sleeve enables the central rod to be freely disconnected, the sealing effect of the blanking plug is not affected, and the valve to be replaced is convenient to detach and install.

The movable joint assembly comprises a movable joint, a movable joint connector and a movable joint clamping ring, and is connected with the piston rod, so that the blanking plug is convenient to disassemble and assemble in the using process, and the disassembling and the assembling are simple and reliable; the blowout prevention flange is provided with an air release valve and a pressure gauge, the sealing structure adopts a combined sealing mode, the sealing effect is achieved by compressing the combined seal through the packing, the sealing mode is reliable to replace, and the sealing element is convenient to replace.

Further, drilling tool adopts and prevents that the flange cooperation V type is sealed can convenient and reliable's sealed central drilling rod, the utility model discloses a crossbeam is not give up, presses dismouting central drilling rod in the convenient drilling process area for the operation process is simple, and is safe, the utility model discloses a two pneumatic cylinder structure simultaneous control center drilling rods reciprocate, and is more reliable and more stable in the course of the work. The structure of two pneumatic cylinders is favorable to lengthening central drilling rod for the length of central drilling rod can increase to than longer size, the utility model discloses a drilling rod is right the cover and is right the drilling rod at drilling process, reduces drilling process's frictional resistance, the utility model discloses a drilling rod and drilling rod extension bar all have the spacing groove, make things convenient for the drilling rod of drilling process in-process control center, connect the drilling rod or dismantle the drilling rod, and drilling construction cycle is short, and is little to the productivity influence, and is safe, reliable, swift, economy more.

The V-shaped sealing ring assembly is convenient to replace by using the sealing packing; the central drill rod and the drill rod extension rod have a central hole which can cool the drill bit and lubricate during the drilling process.

Drawings

Fig. 1 is a schematic structural view of the full-time intelligent management system of the oil-gas pipe network of the utility model;

fig. 2 is a schematic structural view of the emergency cut-off device of the present invention;

FIG. 3 is a structural diagram of a valve repairing tool with pressure according to the present invention;

FIG. 4 is a second structural diagram of the valve repairing tool with pressure according to the present invention;

FIG. 5 is a block rod structure diagram of the valve repairing tool under pressure;

FIG. 6 is a schematic view of the movable connecting assembly of the valve repairing tool under pressure according to the present invention;

FIG. 7 is a schematic view of the plug of the valve repairing tool under pressure;

FIG. 8 is a schematic structural view of the valve-changing tool with pressure according to the present invention;

fig. 9 is the schematic structural view of the drilling tool with pressure of the present invention.

Wherein, 1, gas production tree; 2. an emergency cut-off device; 3. an optical fiber; 4. a gathering pipeline; 5. a gas collection station;

1-1, a motor; 1-2, an explosion-proof box; 1-3, installing a bottom plate; 1-4, a shield; 1-5, pinion; 1-6, a first bond; 1-7, a bull gear; 1-8, locking a nut; 1-9, a handle nut; 1-10 parts of lead screw protective cap; 1-11, a screw rod; 1-12, screw nut; 1-13, a second bond; 1-14, bearing A; 1-15, an upper cover; 1-16, an anti-rotation bracket; 1-17, a sliding sleeve; 1-18, a slide block; 1-19, a pressure sensor; 1-20, high-pressure stop valve; 1-21, a first sealing ring; 1-22, a top cover; 1-23, a second sealing ring; 1-24, a valve stem; 1-25, valve cover; 1-26, a third sealing ring; 1-27, a valve body; 1-28, valve seat; 1-29, a spring; 1-30, a sealing gasket ring; 1-31, a suspension core; 1-32, high strength bolts; 1-33, a fourth sealing ring; 1-34, closing the valve core; 1-35, a locking cap; 1-36, a fifth sealing ring;

2-1, a big cross; 2-2. sleeve; 2-3. a plug; 2-4, sealing the rubber cylinder; 2-5, a first upright post; 2-6. a center rod; 2-7, a blowout prevention flange B; 2-8, righting the cross beam; 2-9, a limit nut; 2-10. a second upright post; 2-11. the beam is not released; 2-12. hydraulic cylinder; 2-13, a plug connecting rod; 2-14, shaft sleeve; 2-15, central axis; 2-16, a first seal; 2-17, a second seal; 2-18, an upper plug of the blanking plug; 2-19, a movable joint; 2-20 parts of movable joint connectors; 2-21, a movable joint snap ring; 2-22, pressing a cap; 2-23, a piston rod; 2-24, fixing a nut; 2-25, pressing a cap on the center rod; valves No. 2-26, 4; 2-27, number 1 master control valve;

3-20, upright columns; 3-21, hydraulic cylinder short section; 3-22, column joints;

4-1, fixing a nut on the upright post; 4-2, upright A; 4-3, a drill bit; 4-4, a centralizing sleeve; 4-5, reducer union; 4-6, a central drill rod; 4-7, a V-shaped compression nut; 4-8, a V-shaped sealing ring component; 4-9, sealing packing; 4-10, upright post extension bar; 4-11, the beam A is not released; 4-12, lengthening a drill rod; 4-13, motor beam; 4-14, motor support; 4-15, hydraulic motor; 4-16, a hydraulic cylinder A; 4-17, connecting splines; 4-18, a drill rod conversion shaft; 4-19, bearing B; 4-20, a drill rod retaining ring; 4-21, a column A limit nut; 4-22, a lower righting crossbeam; 4-23, a blowout prevention flange A; 4-24, hydraulic cylinder beam; 4-25 and a cooling water injection port.

Detailed Description

The invention will be described in further detail with reference to the following drawings and specific embodiments:

referring to fig. 1, the full-time intelligent management system for the oil and gas pipeline network comprises an optical fiber 3 laid between a gas production wellhead (a gas production tree 1 at a wellhead) and a gas collection station 5, or between the gas collection station and the gas collection station, or along a long-distance pipeline, wherein the optical fiber is laid along a gathering pipeline 4; the gas collecting station is internally provided with a control system, the optical fibers are connected with the control system, the control system is used for closing the emergency cut-off devices 2 arranged on the gathering and transportation pipeline according to alarm data collected by the optical fibers and repairing or replacing valves according to valve faults of the cut-off pipeline, wherein the emergency cut-off devices 2 are distributed on the gathering and transportation pipeline 4.

Referring to fig. 2, the emergency cut-off device comprises valve bodies 1-27, wherein the high-pressure ends of the valve bodies 1-27 are connected with an upstream pipeline of a gas transmission pipeline, the low-pressure ends of the valve bodies 1-27 are connected with a downstream pipeline of the gas transmission pipeline, valve covers 1-25 are connected on the valve bodies 1-27, top covers 1-22 are connected on the valve covers 1-25, upper covers 1-15 are connected on the top covers 1-22, mounting bottom plates 1-3 are connected on the upper covers 1-15, motors 1-1 are connected on the mounting bottom plates 1-3, screw nuts 1-12 are inserted on the upper covers 1-15 through bearings A1-14, output shafts of the motors 1-1 are connected with pinions 1-5 through first keys 1-6, the pinions 1-5 are meshed with large gears 1-7 connected on the screw nuts 1-12, the big gear 1-7 and the lead screw nut 1-12 are connected through keys and fixed by a locking nut 1-8, a lead screw 1-11 matched with the lead screw nut 1-12 is inserted in the lead screw nut 1-12, the bottom of the lead screw 1-11 is connected to a sliding sleeve 1-17 through an anti-rotation support 1-16, a sliding block 1-18 is arranged in the sliding sleeve 1-17, the sliding block 1-18 is connected with a valve rod 1-24 inserted in the sliding sleeve 1-17, the lower part of the valve rod 1-24 is connected to a closing valve core 1-34 through a top cover 1-22, the lower part of the top cover 1-22 is connected to a valve seat 1-28 arranged in a valve body 1-27 through a suspension core 1-31, the closing valve core 1-34 is positioned at the inner side of the suspension core 1-31, the upper part of the closing valve core 1-34 is provided with a locking cap 1-35 matched with the valve rod 1-24, the side wall of the top cover 1-22 is provided with a detection port, the detection port is connected with a high-pressure stop valve 1-20, and a pressure sensor 1-19 is arranged between the detection port and the high-pressure stop valve 1-20.

The motor 1-1 penetrates through the explosion-proof box 1-2 and is connected to the mounting bottom plate 1-3; the outer sides of the screw nuts 1-12 are connected with handle nuts 1-9 through second keys 1-13; the top of the screw nut 1-12 is connected with a screw protective cap 1-10; the valve cover 1-25 is connected with the valve body 1-27 through a plurality of high-strength bolts 1-32, and a sealing gasket ring 1-30 is arranged at the joint of the valve cover 1-25 and the valve body 1-27; the mounting bottom plate 1-3 is connected with a shield 1-4 which can protect the bull gear 1-7 and the pinion gear 1-5; the valve rod 1-24 is provided with a first sealing ring 1-21 through the top cover 1-22, the joint of the top cover 1-22 and the valve cover 1-25 is provided with a second sealing ring 1-23, the joint of the valve seat 1-28 and the valve body 1-27 is provided with a third sealing ring 1-26, the closing valve core 1-34 is provided with a fourth sealing ring 1-33 matched with the valve seat 1-28, and the lower end of the valve rod 1-24 is provided with a fifth sealing ring 1-36 matched with the closing valve core 1-34.

When repairing the valve, a pressurized valve repairing tool is adopted, referring to fig. 3 to 7, the pressurized valve repairing tool comprises a valve connected to a large four-way flange of a wellhead, the upper part of the valve is connected with a blowout prevention flange B2-7, the upper part of the blowout prevention flange B2-7 is connected to a hydraulic cylinder 2-12 through a hydraulic cylinder short joint, a plugging rod is inserted into the hydraulic cylinder 2-12, the upper part of the blocking rod extends out of the hydraulic cylinder 2-12 and comprises a blocking device, the upper part of the blocking device is connected with a piston rod 2-23, a central rod 2-6 is arranged in a central hole of the blocking device and a central hole of the piston rod 2-23 in an inserting mode, the free end of the central rod 2-6 penetrates out of the end part of the piston rod 2-23, and the end part of the piston rod 2-23 is fixed on the central rod 2-6 through a fixing nut 2-24 and a central rod pressing cap 2-25;

the blanking plug comprises a sleeve 2-2 connected with a piston rod 2-23, the free end of the sleeve 2-2 is connected to a sealing rubber cylinder 2-4, the free end of the sealing rubber cylinder 2-4 is fixed through a plug 2-3, and the lower end of a central rod 2-6 is in threaded connection with the plug 2-3;

the blowout prevention flange B2-7 or the hydraulic cylinder 2-12 is connected with a centering beam 2-8, a piston rod 2-23 at the upper part of the plugging rod is connected with a non-releasing beam 2-11, two ends of the centering beam 2-8 and the non-releasing beam 2-11 are respectively connected through a first upright post 2-5 and a second upright post 2-10, the blowout prevention flange B2-7 is provided with a vent valve and a pressure gauge, and the blowout prevention flange B is sealed through combined sealing.

The upper part of the sleeve 2-2 is connected with a plug connecting rod 2-13, the upper part of the plug connecting rod 2-13 is connected with a plug upper joint 2-18, the upper part of the plug upper joint 2-18 is connected to a piston rod 2-23 through a movable connecting assembly, the upper part of the plug upper joint 2-18 is hollow, the hollow of the movable connecting assembly and the hollow of the piston rod 2-23 are provided with a central rod 2-6 in an inserting way, a shaft sleeve 2-14 is arranged in the plug connecting rod 2-13, the lower part of the plug connecting rod 2-13 is connected to the sleeve 2-2, the free end of the sleeve 2-2 is connected to a sealing rubber cylinder 2-4, the free end of the sealing rubber cylinder 2-4 is fixed through a plug 2-3, and the upper end of the shaft sleeve 2-14 is connected with the, the lower end of the hollow sleeve is connected with a central shaft 2-15, the free end of the central shaft 2-15 is inserted into the hollow parts of the sleeve 2-2, the sealing rubber cylinder 2-4 and the plug 2-3, and the plug 2-3 is in threaded connection with the central shaft 2-15;

the inner part of the connecting rod 2-13 of the blanking plug is provided with a unthreaded hole, the outer part of the shaft sleeve 2-14 is provided with a unthreaded rod, and the shaft sleeve 2-14 is in clearance fit with the connecting rod 2-13 of the blanking plug;

the movable joint assembly comprises movable joint connectors 2-20 connected with connectors 2-18 on the blanking plug, the movable joint connectors 2-20 are connected to movable joints 2-19 through pressing caps 2-22, movable joint clamping rings 2-21 are arranged between the movable joint connectors 2-20 and the pressing caps 2-22, and the movable joints 2-19 are connected with piston rods 2-23;

a first sealing element 2-16 is arranged between the connecting rod 2-13 of the blanking plug and the sleeve 2-2, and a second sealing element 2-17 is arranged between the sleeve 2-2 and the central shaft 2-15;

the piston rod 2-23 is in clearance fit with the central rod 2-6;

the first upright post 2-5 and the righting cross beam 2-8 and the non-releasing cross beam 2-11 as well as the second upright post 2-10 and the righting cross beam 2-8 and the non-releasing cross beam 2-11 are fixed through a limit nut 2-9.

Referring to fig. 5 to 8, the pressurized valve changing tool comprises a column assembly connected to a large four-way flange of a wellhead, the upper part of the column assembly is connected with a plugging rod through a centralizing crossbeam 2-8, the blocking rod is inserted into the hydraulic cylinder assembly in a penetrating mode, the blocking rod comprises a blocking device, the upper portion of the blocking device is connected to the movable connecting assembly through a blocking device upper connector 2-18, the upper portion of the movable connecting assembly is connected with a piston rod 2-23, the upper portion of the blocking device is hollow, a center hole of the blocking device upper connector 2-18, a center hole of the movable connecting assembly and a center hole of the piston rod 2-23 are provided with center rods 2-6 in a penetrating mode, the free end of each center rod 2-6 penetrates out of the end portion of the piston rod 2-23, and the end portion of each piston rod 2-23 is fixed to the center rod 2-6 through a fixing nut;

the blanking plug comprises a blanking plug connecting rod 2-13 connected with a blanking plug upper connector 2-18, a shaft sleeve 2-14 is installed inside the blanking plug connecting rod 2-13, the lower part of the blanking plug connecting rod 2-13 is connected with a sleeve 2-2, the free end of the sleeve 2-2 is connected to a sealing rubber cylinder 2-4, the free end of the sealing rubber cylinder 2-4 is fixed through a plug 2-3, the upper end of the shaft sleeve 2-14 is connected with a center rod 2-6, the lower end of the shaft sleeve 2-14 is connected with a center shaft 2-15, the free end of the center shaft 2-15 is inserted into center holes of the sleeve 2-2, the sealing rubber cylinder 2-4 and the plug 2-3, and the plug 2-3 is in threaded connection with the center shaft 2;

the hydraulic cylinder assembly comprises hydraulic cylinders 2-12, the lower parts of the hydraulic cylinders 2-12 are connected to a blowout prevention flange B through hydraulic cylinder short sections 3-21, the lower part of the blowout prevention flange B is connected to a wellhead large four-way flange through a valve, the lower part of a plugging rod penetrates through the interior of the wellhead large four-way flange, the upper part of the plugging rod penetrates through the hydraulic cylinders 2-12, and the plugging rod is connected with the centralizing cross beam 2-8 through grooves in the outer sides of piston rods 2-23; and the blowout prevention flange B is provided with a vent valve and a pressure gauge and is sealed through combined sealing.

The inner part of the connecting rod 2-13 of the blanking plug is provided with a unthreaded hole, the outer part of the shaft sleeve 2-14 is provided with a unthreaded rod, and the shaft sleeve 2-14 is in clearance fit with the connecting rod 2-13 of the blanking plug; the piston rod 2-23 is in clearance fit with the central rod 2-6; the upright post assembly comprises two upright posts 3-20, the bottoms of the two upright posts 3-20 are connected with a large four-way flange of a well head through upright post joints 3-22, and the upper parts of the two upright posts 3-20 are connected with the righting cross beams 2-8 in a matching manner; the movable joint assembly comprises movable joint connectors 2-20 connected with connectors 2-18 on the blanking plug, the movable joint connectors 2-20 are connected to movable joints 2-19 through pressing caps 2-22, movable joint clamping rings 2-21 are arranged between the movable joint connectors 2-20 and the pressing caps 2-22, and the movable joints 2-19 are connected with piston rods 2-23; a first sealing element 2-16 is arranged between the plug connecting rod 2-13 and the sleeve 2-2, and a second sealing element 2-17 is arranged between the sleeve 2-2 and the central shaft 2-15.

Referring to fig. 9, the under-pressure drilling tool comprises blowout prevention flanges A4-23 fixed on a standby control valve of a valve to be operated, a central drill rod 4-6 is inserted into the centers of the blowout prevention flanges A4-23, V-shaped seals for sealing the central drill rod 4-6 are arranged on the upper and lower sides of the blowout prevention flanges A4-23, the bottom of the central drill rod 4-6 is connected to a drill bit 4-3 through a centering sleeve 4-4, and a drill rod extension rod 4-12 is connected to the top of the central drill rod 4-6;

the upper part of the blowout prevention flange A4-23 is connected with a lower centering beam 4-22, the middle part of the lower centering beam 4-22 is inserted into a central drill rod 4-6, two ends of the lower centering beam are inserted with upright posts A4-2, the bottom of the upright post A4-2 is fixed on a fixing seat of a valve to be drilled, the central drill rod 4-6 is connected with a non-releasing beam A4-11, the non-releasing beam A4-11 is positioned on the upper side of the lower centering beam 4-22, the middle part of the non-releasing beam A4-11 is inserted into the central drill rod 4-6, two ends of the non-releasing beam A4-2 are inserted into the upright post A4-2, and the top of the upright post A4-2 is;

the top of the upright post A extension bar 4-10 is connected with a motor beam 4-13, two ends of the motor beam 4-13 are fixed with hydraulic cylinders A4-16, the middle part of the motor beam is connected with a motor support 4-14, a hydraulic motor 4-15 is arranged on the motor support 4-14, the center of the motor support 4-14 is provided with a connecting spline 4-17 and a drill rod conversion shaft 4-18, an output shaft of the hydraulic motor 4-15 is connected to the drill rod conversion shaft 4-18 through the connecting spline 4-17, the lower part of the drill rod conversion shaft 4-18 is inserted into the center of the motor beam 4-13, and the bottom of the drill rod conversion shaft 4-18 is connected with the top of the drill rod extension bar 4-12;

the hydraulic cylinders A4-16 and the hydraulic motors 4-15 are controlled by a hydraulic control console.

The center of the blowout-preventing flange A4-23 is provided with an upper sealing groove and a lower sealing groove for mounting a V-shaped seal, a V-shaped sealing ring component 4-8, a V-shaped compression nut 4-7 and a sealing packing 4-9 are sequentially arranged in the sealing groove at the upper side from bottom to top, and a V-shaped sealing ring component 4-8, a V-shaped compression nut 4-7 and a sealing packing 4-9 are sequentially arranged in the sealing groove at the lower side from top to bottom;

the blowout prevention flange A4-23 is fixed on a standby control valve of a valve to be operated through 8 stud bolts and matched nuts, a connecting surface is sealed through an octagonal gasket, and a sensor for measuring medium pressure or temperature parameters and a vent valve for medium discharge in the operation process are installed on the blowout prevention flange A4-23;

the lower centering cross beam 4-22 consists of a male cross beam and a female cross beam, the male cross beam and the female cross beam are connected through a stud, 3 through holes are formed in the lower centering cross beam 4-22, the size of the middle through hole is matched with that of a central drill rod 4-6 and used for penetrating through the central drill rod 4-6, the through holes in the left end and the right end are used for installing a left upright post A4-2, and the lower centering cross beam 4-22 is used for centering the blowout prevention flange A4-23 and preventing the blowout prevention flange A4-23 from rotating;

the lower righting crossbeam 4-22 and the non-releasing crossbeam A4-11 are connected with an upright post A4-2 through an upright post A limit nut 4-21; a bearing B4-19 is arranged between the motor beam 4-13 and the drill rod conversion shaft 4-18, the motor support 4-14 is in threaded connection with the motor beam 4-13, and the motor support 4-14 is connected with the hydraulic motor 4-15 through a bolt;

a cooling water injection port 4-25 communicated with the centers of the drill rod extension rods 4-12 and the central drill rod 4-6 is arranged on the motor cross beam 4-13;

the drill rod extension rod 4-12 is connected to the drill rod change-over shaft 4-18 through threads, the central drill rod 4-6 is connected with the drill rod extension rod 4-12 through threads, the centering sleeve 4-4 is connected with the central drill rod 4-6 through threads, and the drill bit 4-3 is connected with the centering sleeve 4-4 through threads;

a plurality of positioning grooves are formed in the central drill rod 4-6 and the drill rod extension rod 4-12, one positioning groove is used for installing the non-releasing cross beam A4-11, and the rest positioning grooves are provided with drill rod guard rings 4-20;

the top of the hydraulic cylinder A4-16 is connected with a hydraulic cylinder A beam 4-24.

When the device is used, the gathering and transportation pipeline is monitored through the optical fibers, when abnormal conditions (such as third-party invasion, geological disasters or pipeline leakage) are detected, alarm data are transmitted to the control system, the control system closes the emergency cut-off devices arranged at two ends of a failure point of the gathering and transportation pipeline according to the alarm data acquired by the optical fibers, and repairs or changes valves according to valve failures of the cut-off pipeline, and if the valve failures are caused by the leakage of a main control valve of a wellhead gas production tree, a valve-changing tool with pressure is adopted to change the failed valve with pressure; if the fault main control valve cannot be opened and closed, a pressure drilling tool is adopted to establish a new operation channel, and then a pressure valve replacing tool is adopted to replace the fault valve; if the sealing steel ring of the wellhead gas production tree component leaks, and the gathering pipeline breaks down due to invasion or leakage of a third party, the pressurized plugging maintenance is carried out by adopting a tool with a valve repairing tool.

The working process of the emergency cut-off device is as follows:

during normal production, the cut-off device is in an open state, a certain distance exists between the sealing surface of the closed valve core 1-34 and the valve seat 1-28, pipeline gas enters the valve cover 1-25 through the high-pressure end of the valve body 1-27, and enters the low-pressure end through the side hole of the suspended valve core 1-31 and the closed valve core 1-34 to form an airflow channel.

When a pipeline needs to be cut off, a program gives a command to the motor 1-1, the motor 1-1 rotates to drive the pinion 1-5, the gearwheel 1-7 and the screw nut 1-12 to rotate, the screw 1-11 moves downwards to push the valve rod 1-24, the closing valve core 1-34 moves downwards to the valve seat 1-28, the fourth sealing ring 1-33 on the closing valve core 1-34 is sealed with the valve seat 1-28, and the pipeline is cut off.

When the pressure sensor 1-19 detects that the line pressure exceeds or falls below the set value, the control system will automatically command the motor 1-1 to perform a valve closing action.

When the upstream pipeline is suddenly pressurized or the downstream pipeline is suddenly depressurized, the motor 1-1 does not need to act, the sliding block 1-18 moves downwards in the sliding sleeve 1-17 to drive the valve rod 1-24 and the closing valve core 1-34 to move downwards to the valve seat 1-28, the fourth sealing ring 1-33 on the closing valve core 1-34 is sealed with the valve seat 1-28, and the pipeline is cut off. In the process, the key point is that when the pipeline normally conducts gas, a certain free stroke is left between the sliding block 1-18 and the sliding sleeve 1-17, the valve rod 1-24 and the closing valve core 1-34 are in a suspension static balance state under the action of air pressure, and when the pressure fluctuation of the pipeline is large, the sliding block 1-18 can drive the valve rod 1-24 and the closing valve core 1-34 to move downwards to the valve seat 1-28.

When a pipeline in a cut-off state needs to be opened and a cut-off device recovers the pipeline, a control system gives a command to a motor 1-1, the motor 1-1 rotates to drive a pinion 1-5, a gearwheel 1-7 and a lead screw nut 1-12 to rotate, a lead screw 1-11 moves upwards to pull a valve rod 1-24 and a closed valve core 1-34 to move upwards to leave a valve seat 1-28 for a certain distance, a fourth sealing ring 1-33 on the closed valve core 1-34 is separated from the valve seat 1-28, and an airflow channel of the pipeline is opened. In the process, the key point is that secondary lifting is used when the valve core 1-34 is lifted and closed, when the motor 1-1 pulls the valve rod 1-24 to move upwards, the fifth sealing ring 1-36 between the valve rod 1-24 and the valve core 1-34 is firstly pulled open, a small channel is opened by upstream and downstream airflow, after the pipeline pressure is balanced for a period of time, the valve core 1-34 is lifted and closed for the second time, and the fourth sealing ring 1-33 between the valve core 1-28 is separated from the valve core 1-33, so that the using power of the motor 1-1 is greatly reduced, the fifth sealing ring 1-36 at the lower end of the valve rod 1-24 can be separated from the valve core 1-34 by low voltage and low power, a small air channel is formed firstly, and then the valve core 1-34 can be lifted and closed easily to form an.

The use engineering of the pressurized valve repairing tool is as follows:

take the example of the commonly used gas production wellhead KQ65-70 gas production tree, which needs to maintain the No. 1 main control valve 2-27. The leakage of the No. 1 main control valve of the gas production tree is found to be serious on site, the No. 1 main control valve of the wellhead needs to be maintained under pressure for 2-27, the oil pressure of the wellhead is 9.2MPa, and the sleeve pressure is 14.2 MPa.

Firstly, preparation of construction

1. After the construction operation team arrives at the site, the safety warning area is arranged according to the requirements, and the fire-fighting emergency equipment, the safety warning board, the wind vane and the escape route board are placed and fixed according to the requirements. Personnel irrelevant to construction, site construction supervision and monitoring cannot enter a safety alert area. And putting the valve repairing tool in order, and checking the tool and equipment.

2. The PPE is worn by field workers, and safety belts are needed to be equipped during high-altitude operation;

3. wellhead pressure was recorded and recorded.

4. Measurements are made in situ to determine the location of the blockage and are recorded.

5. And (5) carrying out construction safety education on constructors.

Second, the operation process

1. Preparation work

The valve repairing tool with pressure and the matched equipment are placed in order, and the tool and the equipment are checked. The valve repairing tool and the matched equipment are cleaned, the hydraulic control console is connected with wires and filled with oil, and the equipment is placed neatly. And (3) completely closing the No. 4 valves 2-26, and operating the gas production wellhead according to the gas production process flow under the condition of no leakage, dismantling the upper parts of the No. 4 valves 2-26 of the gas production wellhead, and placing the valves at the specified positions.

And installing a blowout prevention flange B2-7 on a No. 4 valve 2-26, wherein a hydraulic cylinder short joint, a hydraulic cylinder 2-12 and a plugging rod are arranged on the blowout prevention flange B2-7 and connected with a hydraulic control console for test operation.

The tool performs a hermetic seal test according to the test process requirements, and the device is ensured to have no leakage within the rated pressure stabilizing time period.

2. Procedure for the preparation of the

Opening a No. 4 valve 2-26 and a No. 1 main control valve 2-27, controlling a hydraulic station to inject oil into an upper cavity of a hydraulic cylinder through a hydraulic control console, enabling a piston rod 2-23 to drive a blanking plug to descend to a specified position, tightly pressing the piston rod 2-23 through a fixing nut 2-24 on the piston rod 2-23, then loosening a central rod pressing cap 2-25, enabling a central rod 2-6 to move upwards, sealing the blanking plug, pushing a sealing rubber cylinder 2-4 downwards through the central rod 2-6 to pressurize the sealing rubber cylinder for two times, squeezing the sealing rubber cylinder 2-4 to enable the blanking to be safer and more reliable, then opening an air release valve on a blowout prevention flange B2-7 after the numerical value of a pressure gauge on the blowout prevention flange 7 is stable, discharging media in a cavity between the blanking plug rod and the blowout prevention flange, closing the air, the plugging is complete.

In the plugging state, the fault valve is disassembled according to the assembly process, the damaged part of the valve is repaired, and the valve is restored after the part is repaired or replaced.

And removing the non-releasing cross beam, operating the central rod to move the central rod, removing the blockage of the blocked part, and then injecting oil into the lower cavity of the hydraulic cylinder through the hydraulic station until the oil cylinder moves upwards to the top end of the hydraulic cylinder to stop.

4) Dismounting device: and closing the spare gate valve, disassembling the tool and cleaning the site.

The use process of the pressurized valve replacing tool is as follows:

the number 1 main control valves 2-27 need to be replaced by a commonly used gas production wellhead KQ65-70 gas production tree. The serious gas production tree No. 1 main control valve is found to have serious inner leakage on site, the No. 1 main control valve of a well mouth needs to be replaced, the oil pressure of the well mouth is 8Mpa, and the sleeve pressure is 13.5 Mpa.

Firstly, preparation of construction

1. After the construction operation team arrives at the site, the safety warning area is arranged according to the requirements, and the fire-fighting emergency equipment, the safety warning board, the wind vane and the escape route board are placed and fixed according to the requirements. Personnel irrelevant to construction, site construction supervision and monitoring cannot enter a safety alert area. The valve replacing device is placed in order, and tools and equipment are checked.

3. wellhead pressure was recorded and recorded.

5. And (5) carrying out construction safety education on constructors.

Second, the operation process

1. Preparation work

The pressurized valve replacing device and the matched equipment are placed in order, and tools and equipment are checked. Taking out the valve changing device and the matched equipment, cleaning the valve changing device and the matched equipment, wiring the hydraulic control cabinet, putting the hydraulic control cabinet in order, and filling oil into the hydraulic control console; and (3) completely closing the No. 4 valves 2-26, and operating the gas production wellhead according to the gas production process flow under the condition of no leakage, dismantling the upper parts of the No. 4 valves 2-26 of the gas production wellhead, and placing the valves at the specified positions.

The method comprises the following steps of installing a left stand column and a right stand column, installing a stand column fixing nut on a large four-way flange, sequentially installing the left stand column and the right stand column, a blowout prevention flange, a hydraulic cylinder assembly, a blanking plug assembly, a centering cross beam and a hydraulic control console, and performing test operation after a special tool is installed in place. The device performs the hermetic seal test according to the test process requirement, and ensures that the device has no leakage in the rated pressure and voltage stabilization time period.

2. Procedure for the preparation of the

The hydraulic station is controlled by the hydraulic control console to inject oil into the upper cavity of the hydraulic cylinder, so that the piston rods 2 to 23 drive the blanking plug to move downwards, and the pressure of the hydraulic oil injected into the hydraulic station is similar to the pressure of natural gas at a well head and slightly higher than the pressure of the well head. The piston rod 2-23 continues to move downwards until the piston rod 2-23 drives the blanking plug to reach a designated position, and the piston rod 2-23 is pressed tightly through the fixing nut 2-24 on the piston rod 2-23.

And (3) loosening the pressing cap 2-25 of the central rod, moving the central rod 2-6 upwards, sealing the blanking plug, operating the shaft sleeve 2-14 through the central rod 2-6 to pressurize the sealing rubber cylinder 2-4 for the second time, and extruding the sealing rubber cylinder 2-4 to stabilize the sealing effect, so that the blanking is safer and more reliable. And opening a vent valve on the blowout prevention flange, draining the medium in the space above the blanking plug, closing the vent valve, waiting for 10 minutes to check whether the pressure gauge has pressure value change, and if no pressure change exists, completing the blockage.

8 bolts for connecting the gate valve to be replaced and the flange on the large four-way are removed, then the hydraulic control console controls the hydraulic station to inject oil into the upper cavity of the hydraulic cylinder, at the moment, the hydraulic cylinder 2-12 carries the detached No. 1 main control valve to move until the hydraulic cylinder moves to the top end of the hydraulic cylinder 2-12 and stops, the locking cross beam is installed, and the blocking rod is fixed.

And (3) disassembling a movable joint assembly on the blanking plug, keeping the part of the blanking plug in a large four-way channel of the wellhead, controlling the blanking plug through a locking cross beam, disassembling the No. 1 main control valve 2-26 needing to be replaced, replacing the No. 1 main control valve 2-26, connecting the new No. 1 main control valve 2-26 with the blowout prevention flange through bolts and nuts, and fixing the blowout prevention flange on the hydraulic cylinder.

And (3) injecting oil into the upper cavity of the oil cylinder to enable the piston rod to move downwards, preparing the connecting thread of the blanking plug, ensuring that the blanking plug does not rotate, and meanwhile, positively rotating the piston rod at the upper end part of the piston rod until the connecting thread of the piston rod and the movable connecting assembly is tightened, fixing the piston rod through a fixing nut by a centering beam, and detaching the locking beam. And (3) controlling a hydraulic station to inject oil into the lower cavity of the hydraulic cylinder through a hydraulic control console, connecting the newly replaced No. 1 main control valve 2-26 with the upper flange of the large four-way valve, and installing the No. 1 main control valve 2-26. At this time, the fixing nut on the piston rod is loosened to release the piston rod. And (3) filling an oil piston rod for the lower cavity of the hydraulic cylinder with a blanking plug to automatically retract into the hydraulic nipple, and closing the No. 4 valve 2-27.

3. Dismounting device: and (5) disassembling the tool, recovering the wellhead and cleaning the site.

The drilling tool with pressure is used as follows:

taking the drilling of the gate valve flashboard of the double-barrelled Christmas tree No. 1 produced by the second petroleum machinery plant in the sea above as an example, the screw rod of the master control valve No. 1 at the well mouth is broken, the flat gate valve cannot be opened, the hole needs to be drilled under pressure, a new operation channel is established, and the oil pressure of the well mouth is 10 Mpa.

Firstly, preparation of construction

1. After a construction operation team is on site, a safety warning area is arranged according to requirements, and fire-fighting emergency equipment, a safety warning board, a wind vane and an escape route board are placed and fixed according to requirements. Personnel irrelevant to construction, site construction supervision and monitoring cannot enter a safety alert area. The staff handset must not be brought into the wellhead area. The drilling device is placed in order, and tools and equipment are checked.

3. wellhead pressure was recorded and recorded.

4. And (4) carrying out field measurement to determine the length of a drill rod of the drilling tool and the depth position of a fault valve plate, and recording.

5. And the construction safety education is carried out on constructors.

Second, the operation process

1. Preparation work

And putting the drilling device with pressure and the matched equipment in order, and checking tools and equipment. Taking out the drilling device and the matched equipment, cleaning the drilling device and the matched equipment, wiring the hydraulic control cabinet, putting the drilling device and the matched equipment in order, and filling oil into the hydraulic control cabinet; and (4) completely closing the No. 4 gate valve and checking under the condition of no leakage, operating the gas production wellhead according to the gas production process flow, dismantling the upper part of the No. 4 gate valve of the gas production wellhead, and placing the gate valve at a specified position.

2. Operating procedure of drilling

2.1 removing 2 pairs of bolts of the flange on the big four-way of the original well mouth, installing the fixed seat on the big four-way, then installing a pair of upright posts on the fixed seat, installing 31/2' EUE conversion flange on the upper end of the Christmas tree, installing the manual control valve on the conversion flange, connecting the blowout preventer with the control valve, connecting the upright posts and the blowout preventer together by using a lower centering beam, installing an oil cylinder cross beam, fixing double hydraulic cylinders on the two upright posts by the oil cylinder upper cross beam respectively, installing accessories such as a drill bit, a centering sleeve, a drill rod extension rod, a drill rod and the like, tightening all the bolts, and switching the valve to be switched according to the specification to complete the preparation work before drilling (the thickness of a drilling valve plate is 50 mm).

2.2 connecting the drill rod on the lower centralizing beam, and adjusting the drill rod to ensure the centering of the drill hole;

2.3 pressure test of the drilling device:

the drilling device carries out hydrostatic test according to the requirement, and ensures that the pressure of a wellhead is stabilized for 15min without leakage when the pressure of the wellhead is 21 MPa.

2.4 open the hydraulic control console, check the panel display data, check the hydraulic cylinder system and hydraulic motor system.

2.5 after drilling, opening a cooling system, driving a hydraulic motor to axially rotate by using a first booster pump, driving a hydraulic cylinder to control feeding by using a second booster pump, and continuously checking the discharge condition of chips in a filter in the drilling process, wherein the drilling is performed by using a phi 45mm drill bit with the depth of 45 +/-1 mm;

2.6 after the design depth is drilled, the drill rod is lifted out, the drill bit is changed to be phi 60mm, and the step 2.5 is repeated;

2.7, lifting the drill rod, and replacing the positioning drill bit with a drill bit special for drilling;

2.8 pressurizing in the axial direction, drilling through the gate plate, and ensuring that the total stroke of the drilling tool is enough to drill through the gate plate;

and 2.9, pulling out the reaming bit, closing the control valve, and removing the drilling tool to complete the drilling and reaming processes.

3. And (4) recovering the well site: cleaning a working site, treating special articles according to relevant regulations, preventing the environment from being polluted by wastes, and making work records.

Claims

1. An oil-gas pipe network full-time intelligent management system is characterized by comprising optical fibers laid between a gas production well head and a gas collecting station or between the gas collecting station and the gas collecting station, or optical fibers laid along a long-distance pipeline, wherein the optical fibers are laid along a gathering pipeline; the gas collecting station is internally provided with a control system, the optical fiber is connected with the control system, and the control system is used for closing an emergency cut-off device arranged on the gathering and transportation pipeline according to alarm data acquired by the optical fiber and repairing or replacing a valve according to the valve fault of the cut-off pipeline.

2. The full-time intelligent management system for the oil and gas pipe network according to claim 1, wherein the emergency cut-off device comprises valve bodies (1-27), the high-pressure ends of the valve bodies (1-27) are connected with an upstream pipeline of a gas pipeline, the low-pressure ends of the valve bodies (1-27) are connected with a downstream pipeline of the gas pipeline, the valve bodies (1-27) are connected with valve covers (1-25), the valve covers (1-25) are connected with top covers (1-22), the top covers (1-22) are connected with upper covers (1-15), the upper covers (1-15) are connected with installation bottom plates (1-3), the installation bottom plates (1-3) are connected with motors (1-1), and the upper covers (1-15) are inserted with lead screw nuts (1-12) through bearings A (1-14), an output shaft of the motor (1-1) is connected with a pinion (1-5) through a first key (1-6), the pinion (1-5) is meshed with a gearwheel (1-7) connected to a screw nut (1-12), the gearwheel (1-7) and the screw nut (1-12) are connected through keys and fixed through a locking nut (1-8), a screw rod (1-11) matched with the screw nut (1-12) is inserted in the screw nut (1-12), the bottom of the screw rod (1-11) is connected to a sliding sleeve (1-17) through an anti-rotation support (1-16), a sliding block (1-18) is arranged in the sliding sleeve (1-17), the sliding block (1-18) is connected with a valve rod (1-24) inserted on the sliding sleeve (1-17), the lower part of the valve rod (1-24) is connected to a closing valve core (1-34) through a top cover (1-22), the lower portion of the top cover (1-22) is connected to a valve seat (1-28) arranged in a valve body (1-27) through a hanging core (1-31), a closing valve core (1-34) is located on the inner side of the hanging core (1-31), a spring (1-29) is arranged in the valve seat (1-28), a locking cap (1-35) matched with a valve rod (1-24) is arranged on the upper portion of the closing valve core (1-34), a detection port is formed in the side wall of the top cover (1-22), a high-pressure stop valve (1-20) is connected to the detection port, and a pressure sensor (1-19) is arranged between the detection port and the high-pressure stop valve (1-20).

3. The full-time intelligent management system for the oil and gas pipeline network according to claim 2, wherein the motor (1-1) passes through the explosion-proof box (1-2) and is connected to the installation bottom plate (1-3); the outer side of the screw rod nut (1-12) is connected with a handle nut (1-9) through a second key (1-13); the top of the screw nut (1-12) is connected with a screw protective cap (1-10); the valve covers (1-25) are connected with the valve bodies (1-27) through a plurality of high-strength bolts (1-32), and sealing gasket rings (1-30) are arranged at the joints of the valve covers (1-25) and the valve bodies (1-27); the mounting bottom plate (1-3) is connected with a shield (1-4) which can protect the bull gear (1-7) and the pinion gear (1-5); the valve comprises a valve body (1-27), a valve rod (1-24) and a valve cover (1-22), wherein a first sealing ring (1-21) is arranged at the position where the valve rod (1-24) penetrates through the valve cover (1-22), a second sealing ring (1-23) is arranged at the joint of the valve cover (1-22) and the valve cover (1-25), a third sealing ring (1-26) is arranged at the joint of the valve seat (1-28) and the valve body (1-27), a fourth sealing ring (1-33) matched with the valve seat (1-28) is arranged on a closing valve core (1-34), and a fifth sealing ring (1-36) matched with the closing valve core (1-34.

4. The full-time intelligent management system for the oil and gas pipeline network according to claim 1, characterized in that when repairing valves, a valve repairing tool with pressure is adopted, the valve repairing tool with pressure comprises a valve connected to a large four-way flange of a wellhead, the upper part of the valve is connected with a blowout prevention flange B (2-7), the upper part of the blowout prevention flange B (2-7) is connected to a hydraulic cylinder (2-12) through a hydraulic cylinder short joint, a plugging rod is inserted into the hydraulic cylinder (2-12) and extends out of the hydraulic cylinder (2-12), the plugging rod comprises a plugging device, the upper part of the plugging device is connected with a piston rod (2-23), a central rod (2-6) is inserted into a central hole of the plugging device and a central hole of the piston rod (2-23), and the free end of the central rod (2-6) penetrates out of the end part of the piston, the end part of the piston rod (2-23) is fixed on the central rod (2-6) through a fixing nut (2-24) and a central rod pressing cap (2-25);

the blanking plug comprises a sleeve (2-2) connected with a piston rod (2-23), the free end of the sleeve (2-2) is connected to a sealing rubber cylinder (2-4), the free end of the sealing rubber cylinder (2-4) is fixed through a plug (2-3), and the lower end of a central rod (2-6) is in threaded connection with the plug (2-3);

the blowout prevention flange B (2-7) or the hydraulic cylinder (2-12) is connected with a centering cross beam (2-8), a piston rod (2-23) at the upper part of the plugging rod is connected with a non-releasing cross beam (2-11), two ends of the centering cross beam (2-8) and the non-releasing cross beam (2-11) are respectively connected through a first upright post (2-5) and a second upright post (2-10), the blowout prevention flange B (2-7) is provided with a vent valve and a pressure gauge, and the blowout prevention flange B is sealed through combined sealing.

5. The full-time intelligent management system for oil and gas pipelines and networks according to claim 4, characterized in that the upper part of the casing (2-2) is connected with a blanking plug connecting rod (2-13), the upper part of the blanking plug connecting rod (2-13) is connected with a blanking plug upper connector (2-18), the upper part of the blanking plug upper connector (2-18) is connected to a piston rod (2-23) through a movable connecting assembly, the hollow part of the upper part of the blanking plug, the hollow part of the blanking plug upper connector (2-18), the hollow part of the movable connecting assembly and the hollow part of the piston rod (2-23) are inserted with a central rod (2-6), a shaft sleeve (2-14) is installed inside the blanking plug connecting rod (2-13), the lower part of the blanking plug connecting rod (2-13) is connected to the casing (2-2), the free end of the casing (2-2) is, the free end of the sealing rubber cylinder (2-4) is fixed through a plug (2-3), the upper end of the shaft sleeve (2-14) is connected with the central rod (2-6), the lower end of the shaft sleeve is connected with a central shaft (2-15), the free end of the central shaft (2-15) is arranged in the middle of the sleeve (2-2), the sealing rubber cylinder (2-4) and the plug (2-3) in an inserting mode, and the plug (2-3) is in threaded connection with the central shaft (2-15);

the inner part of the connecting rod (2-13) of the blanking plug is provided with a unthreaded hole, the outer part of the shaft sleeve (2-14) is provided with a polished rod, and the shaft sleeve (2-14) is in clearance fit with the connecting rod (2-13) of the blanking plug;

the movable connecting assembly comprises movable joint connectors (2-20) connected with the upper connectors (2-18) of the blanking plug, the movable joint connectors (2-20) are connected to the movable joints (2-19) through pressing caps (2-22), movable joint clamping rings (2-21) are arranged between the movable joint connectors (2-20) and the pressing caps (2-22), and the movable joints (2-19) are connected with piston rods (2-23);

a first sealing element (2-16) is arranged between the blanking plug connecting rod (2-13) and the sleeve (2-2), and a second sealing element (2-17) is arranged between the sleeve (2-2) and the central shaft (2-15);

the piston rod (2-23) is in clearance fit with the central rod (2-6);

the first upright post (2-5) and the righting cross beam (2-8) and the non-releasing cross beam (2-11) as well as the second upright post (2-10) and the righting cross beam (2-8) and the non-releasing cross beam (2-11) are fixed through limit nuts (2-9).

6. The full-time intelligent management system for the oil and gas pipe network according to claim 1, wherein when the valve is replaced, a valve replacing tool with pressure is adopted to directly replace the valve according to actual conditions, or a new operation channel is established by adopting a drilling tool with pressure, and then a fault valve is replaced by adopting the valve replacing tool with pressure;

the pressurized valve replacing tool comprises a stand column assembly connected to a large four-way flange of a wellhead, the upper part of the stand column assembly is connected with a plugging rod through a centralizing crossbeam (2-8), the blocking rod is inserted into the hydraulic cylinder assembly and comprises a blocking device, the upper portion of the blocking device is connected to the movable connecting assembly through a blocking device upper connector (2-18), the upper portion of the movable connecting assembly is connected with a piston rod (2-23), the upper portion of the blocking device is hollow, a center hole of the blocking device upper connector (2-18), a center hole of the movable connecting assembly and a center hole of the piston rod (2-23) are provided with center rods (2-6) in an inserting mode, the free end of each center rod (2-6) penetrates through the end portion of the piston rod (2-23), and the end portion of each piston rod (2-23) is fixed to the center rod (2-6) through a fixing nut (2-24) and a pressing center rod cap (2-;

the blanking plug comprises a blanking plug connecting rod (2-13) connected with a blanking plug upper connector (2-18), a shaft sleeve (2-14) is installed inside the blanking plug connecting rod (2-13), the lower part of the blanking plug connecting rod (2-13) is connected with a sleeve (2-2), the free end of the sleeve (2-2) is connected to a sealing rubber cylinder (2-4), the free end of the sealing rubber cylinder (2-4) is fixed through a plug (2-3), the upper end of the shaft sleeve (2-14) is connected with a central rod (2-6), the lower end of the shaft sleeve (2-14) is connected with a central shaft (2-15), the free end of the central shaft (2-15) is inserted into the sleeve (2-2), the center holes of the sealing rubber cylinder (2-4) and the plug (2-3) are arranged, and the plug (2-3) is in threaded connection with the central shaft (2-15);

the hydraulic cylinder assembly comprises hydraulic cylinders (2-12), the lower parts of the hydraulic cylinders (2-12) are connected to a blowout prevention flange B through hydraulic cylinder short joints (3-21), the lower part of the blowout prevention flange B is connected to a wellhead large four-way flange through a valve, the lower part of a plugging rod penetrates into the wellhead large four-way flange, the upper part of the plugging rod penetrates out of the hydraulic cylinders (2-12), and the plugging rod is connected with a centralizing beam (2-8) through grooves in the outer sides of piston rods (2-23); and the blowout prevention flange B is provided with a vent valve and a pressure gauge and is sealed through combined sealing.

7. The full-time intelligent management system for oil and gas pipe networks according to claim 6, wherein the inside of the plug connecting rod (2-13) is a smooth hole, the outside of the shaft sleeve (2-14) is a smooth rod, and the shaft sleeve (2-14) and the plug connecting rod (2-13) are in clearance fit; the piston rod (2-23) is in clearance fit with the central rod (2-6); the vertical column assembly comprises two vertical columns (3-20), the bottoms of the two vertical columns (3-20) are connected with a large four-way flange of a wellhead through vertical column joints (3-22), and the upper parts of the two vertical columns (3-20) are connected with the centering cross beams (2-8) in a matched mode; the movable connecting assembly comprises movable joint connectors (2-20) connected with the upper connectors (2-18) of the blanking plug, the movable joint connectors (2-20) are connected to the movable joints (2-19) through pressing caps (2-22), movable joint clamping rings (2-21) are arranged between the movable joint connectors (2-20) and the pressing caps (2-22), and the movable joints (2-19) are connected with piston rods (2-23); a first sealing element (2-16) is arranged between the plug connecting rod (2-13) and the sleeve (2-2), and a second sealing element (2-17) is arranged between the sleeve (2-2) and the central shaft (2-15).

8. The full-time intelligent management system for the oil and gas pipeline network according to claim 6, wherein the under-pressure drilling tool comprises blowout prevention flanges A (4-23) fixed on a standby control valve of a valve to be operated, center drill rods (4-6) are inserted into the centers of the blowout prevention flanges A (4-23), V-shaped seals for sealing the center drill rods (4-6) are arranged on the upper and lower sides of the blowout prevention flanges A (4-23), the bottoms of the center drill rods (4-6) are connected to drill bits (4-3) through centering sleeves (4-4), and drill rod extension rods (4-12) are connected to the tops of the center drill rods (4-6);

the upper part of the blowout prevention flange A (4-23) is connected with a lower centering beam (4-22), the middle part of the lower centering beam (4-22) is inserted into a central drill rod (4-6), two ends of the lower centering beam are inserted with columns A (4-2), the bottom of each column A (4-2) is fixed on a fixing seat of a valve to be drilled, the central drill rod (4-6) is connected with a non-releasing beam A (4-11), the non-releasing beam A (4-11) is positioned on the upper side of the lower centering beam (4-22), the middle part of the non-releasing beam A (4-11) is inserted into the central drill rod (4-6), two ends of the non-releasing beam A (4-2) are inserted into the columns A (4-2), and the top of each column A (4-2) is connected with an;

the top of the upright post A extension bar (4-10) is connected with a motor beam (4-13), two ends of the motor beam (4-13) are fixed with hydraulic cylinders A (4-16), the middle part is connected with a motor support (4-14), the motor support (4-14) is provided with a hydraulic motor (4-15), the center of the motor support (4-14) is provided with a connecting spline (4-17) and a drill rod conversion shaft (4-18), the output shaft of the hydraulic motor (4-15) is connected to the drill rod conversion shaft (4-18) through the connecting spline (4-17), the lower part of the drill rod conversion shaft (4-18) is inserted in the center of the motor beam (4-13), the bottom of the drill rod conversion shaft (4-18) is connected with the top of the drill rod extension rod (4-12);

the hydraulic cylinder A (4-16) and the hydraulic motor (4-15) are controlled by a hydraulic control console.

9. The full-time intelligent management system for the oil and gas pipe network according to claim 8, characterized in that the center of the blowout prevention flange A (4-23) is provided with an upper sealing groove and a lower sealing groove for mounting a V-shaped seal, a V-shaped sealing ring assembly (4-8), a V-shaped compression nut (4-7) and a sealing packing (4-9) are sequentially arranged in the sealing groove at the upper side from bottom to top, and a V-shaped sealing ring assembly (4-8), a V-shaped compression nut (4-7) and a sealing packing (4-9) are sequentially arranged in the sealing groove at the lower side from top to bottom;

the blowout prevention flange A (4-23) is fixed on a standby control valve of the valve to be operated through 8 stud bolts and matched nuts, a connecting surface is sealed through an octagonal gasket, and a sensor for measuring medium pressure or temperature parameters and a vent valve for medium discharge in the operation process are installed on the blowout prevention flange A (4-23);

the lower centralizing crossbeam (4-22) consists of a male crossbeam and a female crossbeam, the male crossbeam and the female crossbeam are connected through a stud, the lower centralizing crossbeam (4-22) is provided with 3 through holes, the size of the middle through hole is matched with the size of a central drill rod (4-6) and is used for penetrating through the central drill rod (4-6), the through holes at the left end and the right end are used for installing a left upright post A (4-2) and a right upright post A (4-2), and the lower centralizing crossbeam (4-22) is used for centralizing the blowout preventing flange A (4-23) and preventing the blowout preventing flange A (4-;

the lower righting cross beam (4-22) and the non-releasing cross beam A (4-11) are connected with the upright post A (4-2) through an upright post A limit nut (4-21); a bearing B (4-19) is arranged between the motor cross beam (4-13) and the drill rod conversion shaft (4-18), the motor support (4-14) is in threaded connection with the motor cross beam (4-13), and the motor support (4-14) is connected with the hydraulic motor (4-15) through a bolt.

10. The full-time intelligent management system for oil and gas pipelines according to claim 8, characterized in that the motor cross beam (4-13) is provided with a cooling water injection port (4-25) communicated with the centers of the drill rod extension rods (4-12) and the central drill rod (4-6);

the drill rod extension rod (4-12) is connected to the drill rod change-over shaft (4-18) through threads, the central drill rod (4-6) is connected with the drill rod extension rod (4-12) through threads, the centering sleeve (4-4) is connected with the central drill rod (4-6) through threads, and the drill bit (4-3) is connected with the centering sleeve (4-4) through threads;

a plurality of positioning grooves are formed in the central drill rod (4-6) and the drill rod extension rod (4-12), one positioning groove is used for installing the non-releasing cross beam A (4-11), and drill rod guard rings (4-20) are installed on the other positioning grooves;

the top of the hydraulic cylinder A (4-16) is connected with a hydraulic cylinder A beam (4-24).