CN113202432B - High-pressure non-releasing wellhead main control valve device capable of being replaced under pressure - Google Patents
High-pressure non-releasing wellhead main control valve device capable of being replaced under pressure Download PDFInfo
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- CN113202432B CN113202432B CN202110428179.0A CN202110428179A CN113202432B CN 113202432 B CN113202432 B CN 113202432B CN 202110428179 A CN202110428179 A CN 202110428179A CN 113202432 B CN113202432 B CN 113202432B
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- 230000000903 blocking effect Effects 0.000 claims abstract description 47
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000008859 change Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 7
- 238000009434 installation Methods 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 14
- 239000007789 gas Substances 0.000 description 12
- 238000007789 sealing Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a high-pressure non-releasing pressurized replacement wellhead main control valve device, which comprises a pressurized feeding system connected with a large four-way joint (17) and a blocking mechanism matched with the pressurized feeding system, wherein the blocking mechanism comprises a lubricator (1), a conveying rod (4), an annular concave structure (18) of the blocking device, the blocking device (16) with an expansion section and a locking device, the lubricator (1) is detachably connected to the top of a wellhead valve group, the conveying rod (4) is connected to the blocking device (16) with the expansion section through the annular concave structure (18) of the blocking device, and the locking device is connected with the conveying rod (4), the blocking device (16) with the expansion section and the pressurized feeding system, so that the purpose of pressurized replacement of a fault main control valve can be realized by utilizing the cooperation of the pressurized feeding system and the blocking mechanism under the condition of blocking underground fluid.
Description
Technical Field
The invention relates to the technical field of well repair operation and the like, in particular to a high-pressure non-releasing wellhead main control valve device capable of being replaced under pressure.
Background
After the petroleum (natural gas) drilling operation is finished, each well must be provided with an oil (gas) production tree, as shown in fig. 1, which comprises a large four-way joint 17, one port of the large four-way joint 17 is connected with a wellhead oil production pipe, the other three ports of the large four-way joint 17 are connected with a plurality of main control valves, two wellhead main control valves (wellhead valve groups) connected with ports opposite to the wellhead oil production pipe are respectively a No. 4 main control valve 2 and a No. 1 main control valve 3, wherein the No. 1 main control valve 3 is connected with the ports of the large four-way joint 17 through an upper cover plate flange 6, the upper cover plate flange 6 is connected and fixed on the ports of the large four-way joint 17 through a mounting screw 15, and the set oil (gas) production tree can effectively control each well, so that the oil (gas) production can realize controllable exploitation or well closing operation according to the requirements of people. In the production process, the oil (gas) well contains a large amount of liquid and gas with extremely strong corrosiveness, and the oil (gas) tree is severely corroded after being contacted with the liquid and gas for a long time, so that the oil (gas) tree is damaged, leaked, corroded and blocked, difficult to operate and the like, thereby the main control valve of the oil (gas) tree loses the control function on the wellhead, and if the wellhead is out of control, serious malignant accidents are necessarily caused, and serious losses are caused to life and property safety of people, national economy and ecological environment, so that the main control valve of the wellhead is required to be replaced once the main control valve of the wellhead has accident potential.
The traditional wellhead main control valve replacement method is to adopt well control liquid to carry out well control operation on a construction well, and when well control is stable, the wellhead main control valve can be replaced. The traditional method has the advantages of long construction period, environmental pollution, high construction cost and secondary damage to the production layer, and particularly the old well in the middle and later stages of production is difficult to recover to the original production amount after well killing due to lower stratum energy, and even becomes a waste well.
Disclosure of Invention
The invention aims to provide a high-pressure non-releasing wellhead main control valve device capable of replacing a fault main control valve under pressure under the condition of blocking underground fluid by utilizing the cooperation of a pressurized feeding system and a blocking mechanism.
The invention is realized by the following technical scheme: the utility model provides a high pressure does not release area pressure change wellhead master control valve device, includes the area pressure feed system that is connected with big cross and with the pressure feed system matched with blocking mechanism, blocking mechanism includes lubricator, transfer lever, the annular indent structure of stopper, the stopper of area expansion section, locking device, lubricator detachable connects at wellhead valves top, and the transfer lever passes through the annular indent structure of stopper and connects on the stopper of area expansion section, and locking device is connected with transfer lever, the stopper of area expansion section, area pressure feed system.
Further in order to better realize the invention, the following arrangement structure is adopted: the locking device comprises a primary locking device and a secondary locking device, and the primary locking device is respectively connected with the conveying rod and the belt pressure feeding system; in the use state, the secondary locking device is connected with the blanking plug with the expansion section and the upper cover plate flange, or the secondary locking device is connected with the blanking plug with the expansion section and the upper flange plate of the No. 1 main control valve.
Further in order to better realize the invention, the following arrangement structure is adopted: the secondary locking device is wrapped and clamped on the annular concave structure of the blanking plug.
Further in order to better realize the invention, the following arrangement structure is adopted: the under-pressure feeding system comprises hydraulic systems symmetrically arranged on two sides of the wellhead valve group, the upper end of the hydraulic system is connected with the primary locking device through an upper locking system, and the lower end of the hydraulic system is connected with an upper cover plate flange through a hydraulic cylinder connecting block.
Further in order to better realize the invention, the following arrangement structure is adopted: the hydraulic cylinder connecting block is connected to the upper cover plate flange through a mounting screw.
Further in order to better realize the invention, the following arrangement structure is adopted: the hydraulic system comprises a set of main hydraulic cylinder and at least one set of auxiliary hydraulic cylinder on either side, six sets of hydraulic cylinders on both sides, and one set of main hydraulic cylinder and two sets of auxiliary hydraulic cylinders (auxiliary hydraulic cylinder A and auxiliary hydraulic cylinder B) on either side, so as to enhance the stability of the pressurized feeding system, and preferably, the main hydraulic cylinder 13, the auxiliary hydraulic cylinder A11 and the auxiliary hydraulic cylinder B12 are designed based on synchronous working modes.
Further in order to better realize the invention, the following arrangement structure is adopted: the upper locking system comprises a hydraulic cylinder locking block A and a hydraulic cylinder locking block B, wherein the hydraulic cylinder locking block A and the hydraulic cylinder locking block B are connected through a hydraulic cylinder locking screw rod, the top ends of cylinder bodies of a main hydraulic cylinder and an auxiliary hydraulic cylinder are connected to the hydraulic cylinder locking block A, the piston rod ends of the main hydraulic cylinder and the auxiliary hydraulic cylinder are connected to the hydraulic cylinder locking block B and a primary locking device, and the bottom ends of the cylinder bodies of the main hydraulic cylinder and the auxiliary hydraulic cylinder are connected to a hydraulic cylinder connecting block.
Further in order to better realize the invention, the following arrangement structure is adopted: the hydraulic cylinder locking screw adopts an M39 screw.
Further in order to better realize the invention, the following arrangement structure is adopted: the expansion section is made of rubber.
Compared with the prior art, the invention has the following advantages:
The invention can realize the purpose of replacing the fault master control valve under pressure by utilizing the cooperation of the pressurized feeding system and the blocking mechanism under the condition of blocking underground fluid.
The invention is integrally arranged on a large four-way joint, when a main control valve connected with an upper cover plate flange fails or two main control valves on opposite sides of a wellhead oil production pipe fail, a blanking plug with an expansion section is conveyed to an inner hole of the upper cover plate flange of the large four-way joint by adopting a pressure conveying system, then the pressure between the upper part of the blanking plug with the expansion section and a lubricator is released, after the pressure of the section is released, a screw rod connected between the No. 1 main control valve and the upper cover plate flange can be detached, then the No. 1 main control valve and the No. 4 main control valve are lifted up, a space is formed between the No. 1 main control valve and the upper cover plate flange, then a secondary locking device is clamped on the blanking plug, and further a threaded hole connected with the No. 1 main control valve by utilizing the screw rod and the upper cover plate flange is used for locking the secondary locking device on the upper end face of the upper cover plate flange, so that the fault valve (the No. 1 main control valve, the No. 4 main control valve or the simple No. 1 main control valve) can be replaced under the condition of pressure in a well.
When the invention is used, when only the No. 4 main control valve has a fault and the No. 1 main control valve leaks inwards, the upper part of the No. 1 main control valve can be blocked by only the blocking device with the expansion section, and then the blocking device is clamped by the secondary locking device and the secondary locking device is locked on the flange plate of the top port of the No. 1 main control valve by the screw rod, so that the No. 1 main control valve and the No. 4 main control valve do not need to be taken down.
Drawings
Fig. 1 is a schematic diagram of an oil (gas) production tree.
Fig. 2 is a schematic perspective view of the present invention (an unplugged state (i.e., an initial state) of the blanking plug with an expansion section).
Fig. 3 is a schematic view of the front view of the present invention (the state of the blanking plug with the expansion section not being blocked (i.e., the initial state)).
Fig. 4 is a schematic perspective view of the present invention (the state of the blanking plug with the expansion section).
Fig. 5 is a schematic view of the front view of the present invention (the state of the blanking plug with the expansion section).
Fig. 6 is a half cross-sectional view of an occluder with an expanded section.
The device comprises a 1-lubricator, a 2-4 master control valve, a 3-1 master control valve, a 4-transmission rod, a 5-secondary locking device, a 6-upper cover flange, a 7-hydraulic cylinder locking block B, an 8-primary locking device, a 9-hydraulic cylinder locking block A, a 10-hydraulic cylinder locking screw, an 11-auxiliary hydraulic cylinder A, a 12-auxiliary hydraulic cylinder B, a 13-master hydraulic cylinder, a 14-hydraulic cylinder connecting block, a 15-installation screw, a 16-plugging device with an expansion section, a 17-large four-way joint and an annular concave structure of the 18-plugging device.
Detailed Description
The present invention will be described in further detail with reference to examples, but embodiments of the present invention are not limited thereto.
Noun interpretation:
The high-pressure oil and gas well refers to a well with the formation pressure provided by geological design as a basis, when the formation fluid fills a well bore, the predicted wellhead closing pressure possibly reaches or exceeds 35MPa, the high-pressure non-releasing wellhead main control valve device with pressure is mainly applied to wellhead main control valve replacement on an oil (gas) production tree of the well, and the high-pressure non-releasing wellhead main control valve device is used for the condition that the high-pressure finger pressure value in the high-pressure non-releasing wellhead main control valve device is more than or equal to 35 MPa; in the whole process of changing the valve under pressure, the blocking tool (the blocking device with the expansion section) is always safely interlocked on the wellhead and is in a whole-process controlled state.
Example 1:
The invention provides a high-pressure non-releasing wellhead main control valve device capable of replacing a fault main control valve under pressure by utilizing the cooperation of a pressurized feeding system and a blocking mechanism under the condition of blocking underground fluid, and particularly adopts the following arrangement structure as shown in fig. 2-6: the device comprises a pressurized feeding system connected with a large four-way joint 17 and a blocking mechanism matched with the pressurized feeding system, wherein the blocking mechanism comprises a lubricator 1, a conveying rod 4, an annular concave structure 18 of the blocking device, the blocking device 16 with an expansion section and a locking device, the lubricator 1 is detachably connected to the top of a wellhead valve group, the conveying rod 4 is connected to the blocking device 16 with the expansion section through the annular concave structure 18 of the blocking device, and the locking device is connected with the conveying rod 4, the blocking device 16 with the expansion section and the pressurized feeding system.
As a preferable arrangement scheme, the under-pressure replacement wellhead valve group device is provided with a two-part under-pressure feeding system and a blocking mechanism matched with the under-pressure feeding system, wherein the under-pressure feeding system is connected with a large four-way joint 17, the blocking mechanism is provided with a lubricator 1, a conveying rod 4, an annular concave structure 18 of the blocking device, the blocking device 16 with an expansion section and a locking device, the lubricator 1 is detachably connected to the top of the wellhead valve group, namely, the lubricator 1 is connected to the top of a No. 4 main control valve 2, the conveying rod 4 is connected with the blocking device 16 with the expansion section through the annular concave structure 18 of the blocking device, and the locking device is connected with the conveying rod 4, the blocking device 16 with the expansion section and the under-pressure feeding system.
When the hydraulic pressure type well head plugging device is used, the lubricator 1 is connected to the top of the No. 4 main control valve 2, the conveying rod 4, the annular concave structure 18 of the plugging device and the plugging device 16 with the expansion section are connected to the top of the No. 4 main control valve 2, the lubricator 1 enters into a well head valve bank formed by the No. 4 main control valve 2 and the No. 1 main control valve 3 from the lubricator 1, a sealing state is formed between the lubricator 1 and the conveying rod 4, the pressure feeding system pushes the annular concave structure 18 of the plugging device and the plugging device 16 with the expansion section to a required position (the upper flange plate of the No. 1 main control valve 3 or the upper cover plate flange 6) in a hydraulic mode by using the conveying rod 4 under the pressurized state, at the moment, the plugging device 16 with the expansion section blocks the lower fluid of the plugging device 16 with the expansion section under the action of the well pressure, then the upper pressure of the plugging device 16 with the expansion section is released by the lubricator 1, and after the pressure release, the main control valve which is not connected with the plugging device 16 with the expansion section in a well head can be detached, and the pressure in the well head can be transferred to the No. 1 main control valve 3 or the upper flange plate 3 or the main control valve 6 or the main control valve 3 can be replaced by the sealing device and the sealing device can be replaced by the sealing device with the absolute valve 2 or the expansion section and the sealing device can be replaced by the sealing device and the performance of the sealing device can be replaced with the sealing device and the sealing device 2 and the performance can be replaced.
Example 2:
The present embodiment is further optimized based on the foregoing embodiment, and the same parts as the foregoing technical solutions will not be described herein, as shown in fig. 2 to fig. 6, and in order to better implement the present invention, the following arrangement structure is specifically adopted: the locking device comprises a primary locking device 8 and a secondary locking device 5, wherein the primary locking device 8 is respectively connected with the conveying rod 4 and the pressurized feeding system; in the use state, the secondary locking device 5 is connected with the blanking plug 16 with the expansion section and the upper cover plate flange 6, or the secondary locking device 5 is connected with the blanking plug 16 with the expansion section and the upper flange of the No. 1 main control valve 3.
As a preferred arrangement, the locking device is provided with two stages, namely a primary locking device 8 and a secondary locking device 5, wherein the transfer rod 4 is connected to the pressurized feed system via the primary locking device 8, and in the use state, the blanking plug 16 with the expansion section is connected to the upper cover flange 6 or the upper flange of the No. 1 main control valve 3 via the secondary locking device 5.
When the two main control valves 3 and 2 are needed to be replaced in use, the transmission rod 4 is pushed by the pressurized feeding system through the primary locking device 8, the transmission rod 4 further pushes the annular concave structure 18 of the blanking plug and the blanking plug 16 with the expansion section, the blanking plug 16 with the expansion section is pushed to the upper cover plate flange 6, the secondary locking device 5 is locked on the blanking plug 16 with the expansion section, and then the secondary locking device 5 can be fixed on the upper cover plate flange 6 by using an additional screw connecting piece or a screw connecting piece which is connected with the upper cover plate flange by the primary main control valve 3; when only the No. 4 main control valve 2 needs to be replaced, the blanking plug 16 with an expansion section is pushed into the No. 1 main control valve 3, the secondary locking device 5 is locked on the blanking plug 16 with the expansion section, then an additional screw connecting piece or a screw connecting piece connected with the original No. 1 main control valve 3 and the No. 4 main control valve 2 can be utilized to fix the secondary locking device 5 on the upper flange plate of the No. 1 main control valve 3, when the secondary locking device 5 is fixed on the upper flange plate of the upper cover plate flange 6 or the No. 1 main control valve 3, the corresponding fault valve can be replaced, and during replacement, the primary locking device 8 can be detached at the moment, then the main control valve at the upper part of the secondary locking device 5 is lifted down along with the blowout pipe by using a lifting tool, then a new main control valve sleeve is arranged on the conveying rod 4, at the moment, the primary locking device 8 is pressurized, the force applied to the blanking plug 16 with the expansion section is removed through the conveying rod 4, the main control valve 1 is removed from the main control valve 1, and the blanking plug 16 can be further removed from the main control valve 1, and the main control valve 3 is further removed from the main control valve 1. The plugging device 16 with the expansion section can be opened after the number 1 main control valve 3 and the number 4 main control valve 2 are installed in place, and the time for opening the plugging device 16 with the expansion section can be determined according to the site situation and is not limited to the above.
Example 3:
the present embodiment is further optimized based on any one of the foregoing embodiments, and the same parts as the foregoing technical solutions will not be described herein, as shown in fig. 2 to fig. 6, and in order to further better implement the present invention, the following arrangement structure is specifically adopted: the secondary locking means 5 is clamped on the annular concave structure 18 of the blanking plug.
As a preferred arrangement, the secondary locking device 5 adopts a hoop structure, and a section of annular concave structure (an annular concave structure 18 forming the blanking plug) is arranged on the annular concave structure 16 of the blanking plug, so that the secondary locking device 5 is wrapped on the annular concave structure 18 of the blanking plug.
Example 4:
The present embodiment is further optimized based on any one of the foregoing embodiments, and the same parts as the foregoing technical solutions will not be described herein, as shown in fig. 2 to fig. 6, and in order to further better implement the present invention, the following arrangement structure is specifically adopted: the pressurized feeding system comprises hydraulic systems symmetrically arranged on two sides of the wellhead valve group, the upper end of the hydraulic system is connected with the primary locking device 8 through an upper locking system, and the lower end of the hydraulic system is connected with the upper cover plate flange 6 through a hydraulic cylinder connecting block 14.
As a preferable arrangement scheme, when the pressurized feeding system is designed, the pressurized feeding system comprises two sets of hydraulic systems, and the two sets of hydraulic systems are symmetrically arranged at two sides of the wellhead valve group, wherein a valve upper turntable connecting line of the wellhead valve group is used as a symmetry axis (namely, any set of hydraulic systems are not arranged at the valve upper turntable side), the upper end of the hydraulic system is connected with the primary locking device 8 through an upper locking system, and the lower end of the hydraulic system is connected with the upper cover plate flange 6 through a hydraulic cylinder connecting block 14.
Example 5:
the present embodiment is further optimized based on any one of the foregoing embodiments, and the same parts as the foregoing technical solutions will not be described herein, as shown in fig. 2 to fig. 6, and in order to further better implement the present invention, the following arrangement structure is specifically adopted: the hydraulic cylinder connecting block 14 is connected to the upper cover flange 6 by a mounting screw 15.
As a preferable arrangement scheme, the installation setting of the wellhead valve group device is effectively replaced by utilizing the matched installation holes of the upper cover plate flange 6 and the large four-way 17, when the installation setting is designed and used, the hydraulic cylinder connecting block 14 is installed and arranged on the upper cover plate flange 6 through the installation screw 15, when the replacement of a fault valve is needed, when the installation of a pressurized feeding system is needed, at least 4 installation screws 15 connected with the upper cover plate flange 6 and the large four-way 17 are withdrawn (at least 2 are withdrawn from two sides respectively, the original installation screw 15 is replaced by new screws one by one), preferably 6 withdrawal screws (3 on two sides respectively), then the hydraulic cylinder connecting block 14 is arranged on the upper cover plate flange 6, the hydraulic cylinder connecting block 14 and the upper cover plate flange 6 are fixed together through the installation holes of the original installation screw 15 on the upper cover plate flange 6 and the reserved connection holes on the hydraulic cylinder connecting block 14, and then the installation of the hydraulic system can be carried out.
Example 6:
The present embodiment is further optimized based on any one of the foregoing embodiments, and the same parts as the foregoing technical solutions will not be described herein, as shown in fig. 2 to fig. 6, and in order to further better implement the present invention, the following arrangement structure is specifically adopted: the hydraulic system comprises a set of main hydraulic cylinders 13 and at least one set of auxiliary hydraulic cylinders on either side.
As the preferable arrangement scheme, the hydraulic system at any side comprises a set of main hydraulic cylinder 13 and at least one set of auxiliary hydraulic cylinder, two sets of preferable auxiliary hydraulic cylinders are respectively an auxiliary hydraulic cylinder A11 and an auxiliary hydraulic cylinder B12, the auxiliary hydraulic cylinder A11 and the auxiliary hydraulic cylinder B12 are respectively arranged at two sides of the main hydraulic cylinder 13, and preferably, the main hydraulic cylinder 13, the auxiliary hydraulic cylinder A11 and the auxiliary hydraulic cylinder B12 are designed based on a synchronous working mode, so that more stable force can be conveyed for the conveying rod 4, and the strength, the safety reliability and the stability of the whole set of wellhead valve group device with pressure replacement are enhanced.
Example 7:
The present embodiment is further optimized based on any one of the foregoing embodiments, and the same parts as the foregoing technical solutions will not be described herein, as shown in fig. 2 to fig. 6, and in order to further better implement the present invention, the following arrangement structure is specifically adopted: the upper locking system comprises a hydraulic cylinder locking block A9 and a hydraulic cylinder locking block B7, wherein the hydraulic cylinder locking block A9 and the hydraulic cylinder locking block B7 are connected through a hydraulic cylinder locking screw rod 10, the top ends of a main hydraulic cylinder 13 and an auxiliary hydraulic cylinder are connected to the hydraulic cylinder locking block A9, the piston rod ends of the main hydraulic cylinder 13 and the auxiliary hydraulic cylinder are connected to the hydraulic cylinder locking block B7 and the primary locking device 8, and the bottom ends of the main hydraulic cylinder 13 and the auxiliary hydraulic cylinder are connected to a hydraulic cylinder connecting block 14.
As a preferable arrangement scheme, the upper locking system comprises a hydraulic cylinder locking block A9 and a hydraulic cylinder locking block B7 which are arranged up and down, the hydraulic cylinder locking block A9 and the hydraulic cylinder locking block B7 are connected through a hydraulic cylinder locking screw 10 (the locking screw 10 can also play a role of a positioning guide rail when a main hydraulic cylinder 13 and an auxiliary hydraulic cylinder work), a primary locking device 8 is arranged between the hydraulic cylinder locking block A9 and the hydraulic cylinder locking block B7, when the upper locking system is arranged, two upper locking systems are respectively arranged on two sides, any upper locking system is fixedly arranged through the two sets of hydraulic cylinder locking screws 10, when the auxiliary hydraulic cylinder of the main hydraulic cylinder 13 is arranged, the bottom ends of the main hydraulic cylinder 13 and the auxiliary hydraulic cylinder are arranged on a hydraulic cylinder connecting block 14 in a threaded fit or interference fit or clamping or threaded auxiliary fitting mode, the top ends of the main hydraulic cylinder 13 and the auxiliary hydraulic cylinder are arranged on the hydraulic cylinder locking block A9 in a threaded fit or interference fit or clamping or threaded auxiliary fitting mode, the piston rod of the auxiliary hydraulic cylinder is further fixed on the hydraulic cylinder locking block B7 in a threaded fit or threaded auxiliary fitting mode, the piston rod end of the main hydraulic cylinder 13 penetrates through the primary locking device 8 and is fixed on the hydraulic cylinder locking block B7 in a threaded fit or threaded auxiliary fitting mode, when the piston rod of the main hydraulic cylinder 13 is connected with the primary locking device 8 in a penetrating manner, the piston rod of the main hydraulic cylinder 13 can be connected and fixed on the primary locking device 8 in a threaded fit mode (in the matching mode, a threaded auxiliary piece (namely a nut) can be arranged above and below the primary locking device 8 to further lock the primary locking device 8 and the piston rod), the locking device can also be connected and fixed on the primary locking device 8 in an interference fit and fastening mode of the upper and lower thread auxiliary parts.
When the hydraulic cylinder is applied, the piston rods of the two hydraulic cylinders are in a remote state at the initial position, then when the piston rods of the hydraulic cylinders begin to shrink inwards, under the action of pressure, the annular concave structure 18 of the blanking plug and the blanking plug 16 with an expansion section are driven by the primary locking device 8 to push the conveying rod 4 to move towards the large four-way 17 side, so as to provide larger or/and more stable force for the conveying rod 4, the auxiliary hydraulic cylinder transfers the pressure to the primary locking device 8 through the hydraulic cylinder locking block B7, when the conveying rod 4 is conveyed, the hydraulic cylinder locking screw 10 connected with the hydraulic cylinder locking block A9 and the hydraulic cylinder locking block B7 plays a role of a positioning guide rail, namely, under the positioning action of the hydraulic cylinder locking screw 10, the primary locking device 8 drives the conveying rod 4 to move downwards or upwards along the hydraulic cylinder locking screw 10, so that the conveying rod 4 can be ensured to accurately drive the annular concave structure 18 of the blanking plug and the blanking plug 16 with the expansion section to be blocked to the preset position, after the blanking is finished, the working state of each hydraulic cylinder is kept, the pressure in the wellhead oil extraction pipe is transferred to the primary locking device 8, the primary locking device 8 is transferred to the large four-way 17 through a hydraulic system, the pressure between the annular concave structure 18 of the blanking plug and the lubricator 1 is released through the lubricator 1 at the moment, the main control valve above the blanking plug 16 with the expansion section can be safely removed, the blanking plug 16 with the expansion section is further fixed on the main control valve or the upper cover plate flange 6 below the annular concave structure 18 of the blanking plug through the secondary locking device 5, the pressure in the well is transferred to the main control valve or the upper cover plate flange 6 connected with the secondary locking device 5 through the blanking plug 16 with the expansion section and the secondary locking device 5 at the moment, the upper locking system and primary locking means 8 may then be removed (or the hydraulic cylinder and primary locking means 8 may be removed, but not limited thereto), and the main control valve and lubricator 1 above the plug 16 with expansion section may be lifted out along the transfer rod 4 for replacement.
When the wellhead valve group (a new No. 1 main control valve 3 and a new No. 4 main control valve 2 (the valves are provided with the lubricator 1 in advance), or a new No. 1 main control valve 3 and a new No. 4 main control valve 2 (the valves are provided with the lubricator 1 in advance)) are hoisted in place, the primary locking device 8 is installed in place, each hydraulic cylinder is synchronously pressurized first, after the pressure in the well is transferred to the upper cover flange 6 again through the transmission rod 4 and the primary locking device 8, the secondary locking device 5 can be detached, after the secondary locking device 5 is detached, the main control valve above the blanking plug 16 with an expansion section is installed on the main control valve or the upper cover flange 6 connected with the blanking plug 16 with the expansion section, after the installation, the blanking plug 16 with the expansion section can be moved upwards to the upper end of the valve plate of the new No. 1 main control valve 3, the new No. 1 main control valve 3 is closed, the pressure is released through the pressure release device of the lubricator 1, and the wellhead valve group device with pressure is detached to restore the original state.
Example 8:
The present embodiment is further optimized based on any one of the foregoing embodiments, and the same parts as the foregoing technical solutions will not be described herein, as shown in fig. 2 to fig. 6, and in order to further better implement the present invention, the following arrangement structure is specifically adopted: the hydraulic cylinder locking screw 10 adopts an M39 screw.
Example 9:
The present embodiment is further optimized based on any one of the foregoing embodiments, and the same parts as the foregoing technical solutions will not be described herein, as shown in fig. 2 to fig. 6, and in order to further better implement the present invention, the following arrangement structure is specifically adopted: the expansion section is made of rubber, and when the transmission rod 4 runs downwards, the expansion section made of rubber is used for blocking the upper part and the periphery of the blanking plug 16, so that well fluid cannot leak out of a wellhead.
Example 10:
The embodiment is further optimized on the basis of any embodiment, the high-pressure non-releasing wellhead main control valve device with pressure is replaced, as shown in fig. 2-6, the wellhead main control valve device comprises a hydraulic feeding system, a blocking mechanism, a locking device and a locking system 4, wherein the hydraulic feeding system adopts a hydraulic system which utilizes hydraulic to provide power, 3 sets of hydraulic systems are preferably symmetrically arranged in design, the 3 sets of hydraulic systems are respectively a main hydraulic cylinder 13, an auxiliary hydraulic cylinder A11 and an auxiliary hydraulic cylinder B12, the auxiliary hydraulic cylinder A11 and the auxiliary hydraulic cylinder B12 are respectively arranged on two sides of the main hydraulic cylinder 13, and preferably, the main hydraulic cylinder 13, the auxiliary hydraulic cylinder A11 and the auxiliary hydraulic cylinder B12 are designed based on a synchronous working mode, so that the hydraulic feeding system can convey larger, more stable and uniform force for a conveying rod 4;
the blocking mechanism is provided with a lubricator 1, a transmission rod 4, an annular concave structure 18 of the blocking device and the blocking device 16 with an expansion section;
The locking device comprises a primary locking device 8 and a secondary locking device 5;
the locking system comprises a hydraulic cylinder locking block A9, a hydraulic cylinder locking block B7 and a hydraulic cylinder connecting block 14;
the annular groove is arranged at the connecting part of the transmission rod 4 and the primary locking device 8, so that the primary locking device 8 is better held on the transmission rod 4, and the transmission rod 4 and the primary locking device 8 can be connected together in a threaded fit or threaded auxiliary fitting mode; an annular groove (an annular concave structure 18 of the blanking plug) is arranged at the connecting part of the blanking plug 16 with the expansion section and the secondary locking device 5, so that the secondary locking device 5 is tightly held on the blanking plug 16 with the expansion section, when the blanking plug is used, the lubricator 1 is detachably connected to the top of the No. 4 main control valve 2, the conveying rod 4 is connected with the blanking plug 16 with the expansion section through the annular concave structure 18 of the blanking plug, the hydraulic cylinder locking block A9 and the hydraulic cylinder locking block B7 are connected through the hydraulic cylinder locking screw rod 10 (the locking screw rod 10 can also play a role of positioning, guiding and stabilizing the whole device when the main hydraulic cylinder 13 and the auxiliary hydraulic cylinder work, thereby increasing the safety and reliability of the whole device), the hydraulic cylinder locking block A9 and the hydraulic cylinder locking block B7 are in an up-down relationship, a primary locking device 8 is arranged between a hydraulic cylinder locking block A9 and a hydraulic cylinder locking block B7, the primary locking device 8 is connected with a transmission rod 4, when a main hydraulic cylinder 13, an auxiliary hydraulic cylinder A11 and an auxiliary hydraulic cylinder B12 are installed, the bottom ends of the main hydraulic cylinder 13, the auxiliary hydraulic cylinder A11 and the auxiliary hydraulic cylinder B12 are installed and fixed on a hydraulic cylinder connecting block 14 in a threaded fit or interference fit or clamping or threaded auxiliary fitting mode, the top ends of the main hydraulic cylinder 13, the auxiliary hydraulic cylinder A11 and the auxiliary hydraulic cylinder B12 are arranged on the hydraulic cylinder locking block A9 in a threaded fit or interference fit or clamping or threaded auxiliary fitting mode, the piston rods of the auxiliary hydraulic cylinders are further fixed on the hydraulic cylinder locking block B7 in a threaded fit or threaded auxiliary fitting mode, the piston rod end of the main hydraulic cylinder 13 passes through the primary locking device 8 and is fixed on the hydraulic cylinder locking block B7 in a threaded fit or threaded auxiliary fitting mode, when the piston rod of the main hydraulic cylinder 13 is connected with the primary locking device 8 in a penetrating manner, the piston rod can be connected and fixed on the primary locking device 8 in a threaded fit mode (in the case of the matching mode, threaded auxiliary pieces (namely nuts are used) are arranged above and below the primary locking device 8 to further lock the primary locking device 8 and the piston rod), and the piston rod is connected and fixed on the primary locking device 8 in an interference fit and upper and lower threaded auxiliary piece fastening mode.
When the fault valve needs to be replaced, the plug 16 with the expansion section is inserted into the wellhead valve group from the top of the lubricator 1, and when the upper cover plate flange 6 is fixedly connected with the hydraulic cylinder connecting block 14: the installation screw rods 15 connecting the upper cover plate flange 6 and the large four-way joint 17 are withdrawn at least 4 (at least 2 on two sides), preferably withdrawn 6 (at least 3 on two sides), then the hydraulic cylinder connecting block 14 is arranged on the upper cover plate flange 6, the hydraulic cylinder connecting block 14 and the upper cover plate flange 6 are fixed together by utilizing the installation holes of the original installation screw rods 15 on the upper cover plate flange 6 and the reserved connection holes on the hydraulic cylinder connecting block 14, and then the installation of a hydraulic system can be carried out, but the hydraulic system and the hydraulic cylinder connecting block 14 can be installed and fixed firstly and then are integrally installed and fixed on the upper cover plate flange 6, and how to install can be adjusted correspondingly according to the situation.
When the hydraulic control device is applied, at the initial position, the piston rods of the auxiliary hydraulic cylinder A11, the auxiliary hydraulic cylinder B12 and the main hydraulic cylinder 13 are in a remote state, then when the piston rods of the auxiliary hydraulic cylinder A11, the auxiliary hydraulic cylinder B12 and the main hydraulic cylinder 13 begin to shrink inwards, under the action of pressure, the annular concave structure 18 of the blanking plug and the blanking plug 16 with an expansion section are driven by the primary locking device 8 to push the conveying rod 4 to move towards the large four-way 17 side, wherein the auxiliary hydraulic cylinder A11 and the auxiliary hydraulic cylinder B12 transfer the pressure to the primary locking device 8 through the hydraulic cylinder locking block B7 so as to provide larger or/and more stable force for the conveying rod 4 in cooperation with the main hydraulic cylinder 13, and the hydraulic cylinder locking screw 10 connected with the hydraulic cylinder locking block A9 and the hydraulic cylinder locking block B7 can play a role of positioning guide rail when conveying the conveying rod 4, namely, under the positioning action of the hydraulic cylinder locking screw 10, the primary locking device 8 drives the conveying rod 4 to move downwards or upwards along the hydraulic cylinder locking screw 10, so that the conveying rod 4 can be ensured to accurately drive the annular concave structure 18 of the blanking plug and the blanking plug 16 with the expansion section to be blocked to a preset position (the upper cover plate flange 6 or the upper port of the No. 1 main control valve 3), after the blanking is finished, the working state of each hydraulic cylinder is kept, the pressure in the wellhead oil production pipe is transferred to the primary locking device 8, the primary locking device 8 is transferred to the large four-way 17 through a hydraulic system, the main control valve above the blanking plug 16 can be safely removed after the pressure between the expansion section 18 and the lubricator 1 is released through the lubricator 1, and further the blanking plug 16 with expansion section is fixed on the main control valve or the upper cover plate flange 6 below the annular concave structure 18 of the blanking plug by the secondary locking device 5, at this time, the pressure in the well is transferred to the main control valve or the upper cover plate flange 6 connected with the secondary locking device 5 by the blanking plug 16 with expansion section and the secondary locking device 5, then the hydraulic cylinder locking block B7, the hydraulic cylinder locking block A9 and the primary locking device 8 can be removed (or the auxiliary hydraulic cylinder A11, the negative stick-up plough B12, the main hydraulic cylinder 13 and the primary locking device 8 are removed at the same time, but not limited to this), and the main control valve and the lubricator 1 above the blanking plug 16 with expansion section are lifted out along the conveying rod 4 for replacement.
When the wellhead valve group (a new No. 1 main control valve 3 and a new No. 4 main control valve 2 (the valves are provided with the lubricator 1 in advance), or a new No. 1 main control valve 3 and a new No. 4 main control valve 2 (the valves are provided with the lubricator 1 in advance)) are lifted in place, the primary locking device 8 is reinstalled, then each hydraulic cylinder is pressurized, after the pressure in the well is transferred to the upper cover flange 6 again through the transmission rod 4 and the primary locking device 8, the secondary locking device 5 can be disassembled, after the secondary locking device 5 is disassembled, the main control valve above the blanking plug 16 with an expansion section is installed on the main control valve or the upper cover flange 6 connected with the blanking plug 16 with an expansion section, the blanking plug 16 with an expansion section is disassembled, the blanking plug 16 with an expansion section is upwards moved to the position above the valve plate of the No. 1 main control valve 3, the No. 1 main control valve 3 is closed, the pressure is released through the pressure release device on the lubricator 1, the wellhead valve group device can be replaced under pressure, then the upper cover flange 6 and the large four-way full-way joint 17 is connected, and the main control valve 4 is further installed, and the production tree is restored to the original position (the installation valve 2). The plugging device 16 with the expansion section can be opened after the number 1 main control valve 3 and the number 4 main control valve 2 are installed in place, and the time for opening the plugging device 16 with the expansion section can be determined according to the site situation and is not limited to the above.
Therefore, the fault valve can be safely replaced under the condition of the pressure in the well.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present invention fall within the scope of the present invention.
Claims (4)
1. High pressure does not release and presses change wellhead main control valve device, its characterized in that: the automatic feeding device comprises a pressurized feeding system connected with a large four-way joint (17) and a blocking mechanism matched with the pressurized feeding system, wherein the blocking mechanism comprises a lubricator (1), a conveying rod (4), an annular concave structure (18) of the blocking device, the blocking device (16) with an expansion section and a locking device, the lubricator (1) is detachably connected to the top of a wellhead valve group, the conveying rod (4) is connected to the blocking device (16) with the expansion section through the annular concave structure (18) of the blocking device, and the locking device is connected with the conveying rod (4), the blocking device (16) with the expansion section and the pressurized feeding system; the locking device comprises a primary locking device (8) and a secondary locking device (5), wherein the primary locking device (8) is respectively connected with the conveying rod (4) and the pressurized feeding system; in the use state, the secondary locking device (5) is connected with the blanking plug (16) with the expansion section and the upper cover plate flange (6); the pressurized feeding system comprises hydraulic systems symmetrically arranged at two sides of the wellhead valve group, and the upper end of the hydraulic system is connected with a primary locking device (8) through an upper locking system; the hydraulic system at any side comprises a set of main hydraulic cylinders (13) and at least one set of auxiliary hydraulic cylinders, and the main hydraulic cylinders (13) at two sides, the auxiliary hydraulic cylinders and the middle transmission rod (4) form a three-dimensional structure together; the upper locking system comprises a hydraulic cylinder locking block A (9) and a hydraulic cylinder locking block B (7), wherein the hydraulic cylinder locking block A (9) and the hydraulic cylinder locking block B (7) are connected through a hydraulic cylinder locking screw (10), the top ends of the cylinders of the main hydraulic cylinder (13) and the auxiliary hydraulic cylinder are connected to the hydraulic cylinder locking block A (9), and the piston rod end of the main hydraulic cylinder (13) penetrates through a primary locking device (8) to be fixed on the hydraulic cylinder locking block B (7); the piston rod end of the auxiliary hydraulic cylinder is connected to the hydraulic cylinder locking block B (7), the bottom ends of the main hydraulic cylinder (13) and the cylinder body of the auxiliary hydraulic cylinder are connected to the hydraulic cylinder connecting block (14) in a threaded fit mode, and the hydraulic cylinder connecting block (14) is connected to the upper cover plate flange (6) through the mounting screw rod (15).
2. The high pressure, no-release, pressurized replacement wellhead master valve device of claim 1, wherein: an annular concave structure is arranged on the blanking plug (16) with the expansion section to form an annular concave structure (18) of the blanking plug, and the secondary locking device (5) is wrapped on the annular concave structure (18) of the blanking plug.
3. The high pressure, no-release, pressurized replacement wellhead master valve device of claim 1, wherein: the hydraulic cylinder locking screw (10) adopts an M39 screw.
4. The high-pressure non-lost pressurized replacement wellhead master valve device according to any one of claims 1,2, 3, wherein: the expansion section is made of rubber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110428179.0A CN113202432B (en) | 2021-04-21 | 2021-04-21 | High-pressure non-releasing wellhead main control valve device capable of being replaced under pressure |
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| CN202110428179.0A CN113202432B (en) | 2021-04-21 | 2021-04-21 | High-pressure non-releasing wellhead main control valve device capable of being replaced under pressure |
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| CN113202432B true CN113202432B (en) | 2024-07-23 |
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