CN207598218U - Intelligent gas production system is opened between a kind of full Wireless integrated form - Google Patents

Abstract

The utility model discloses an all-wireless integrated intelligent gas production system with intervals, which comprises a gas production tree and a control device. Composite valve, the adjustment cut-off composite valve is connected with an electric actuator, and all signal acquisition modules use independent solar power supply and wireless signal transmission to realize that all modules are installed independently of each other physically and realize zero wiring for signal transmission. In addition, the utility model adopts The new structure anti-freezing high pressure differential and zero-leakage regulating cut-off compound valve has zero leakage of gas after the valve is closed, and will not cause natural gas hydrate freezing and blocking phenomenon in the regulating stop compound valve and nearby pipelines, which can improve the efficiency of gas production, and , the utility model adopts a large-thrust electric actuator with a new structure, so that the thrust of the thrust screw can still be maintained when the stepping motor is powered off, and the stepping motor does not need to be powered on when there is no execution action, which can greatly reduce the electric actuator power consumption.

Description

A fully wireless integrated intelligent gas recovery system

technical field

The utility model relates to an intermittent on-off well control and automatic drainage gas recovery device in the exploitation of natural gas wells, which belongs to the technical field of oil and gas field exploitation.

Background technique

According to the generation mechanism of natural gas, in the process of natural gas generation, corresponding water will be produced at the same time as the formation of natural gas. , with the prolongation of the production cycle and the change of the water-vapor ratio in the geological reservoir and the change of the water content in the capillary channel of the reservoir, the gas is continuously produced, and the corresponding water is gradually accumulated in the reservoir, gradually forming natural gas The fluid accumulation in the well became more and more serious, and finally caused the injection to stop due to the height of the fluid accumulation in the wellbore.

In the mixed flow of water and gas, the maximum liquid carrying capacity of the gas is limited and will not increase with the increase of the gas flow rate. Since natural gas wells generally pursue large production in the initial stage of exploitation, the maximum liquid carrying capacity of the gas is fixed at this time, so the produced gas does not carry out the water in the reservoir. Part of the water in the gas well is left in the reservoir, and finally liquid accumulation in the natural gas well is gradually formed, resulting in less or no flow of the gas well, which greatly affects the production of the gas well in the later stage of production.

In the current production process, when the gas well has less injection or stop injection due to liquid accumulation, it is generally shut down and repressurized, and the well is opened for production after the pressure of the tubing rises. This is the conventional manual intermittent control of the well. After the well is shut down and repressurized, the opening of the well is based on experience to judge the pressure difference between the oil pressure and the external delivery pressure to start production. Since it is impossible to judge when the well is opened to achieve the timing and flow control of the gas at the maximum liquid-carrying flow rate, Therefore, more water cannot be discharged in an effective and timely manner, and gradually the accumulation of fluid in the reservoir will be formed. Because it cannot be discharged in a timely and effective manner, more and more water will accumulate in the reservoir, resulting in lower and lower production of the gas well, and finally unable to Therefore, how to effectively use the produced gas to carry more effusion is an urgent problem to be solved in the gas production process.

In addition, water-bearing natural gas has an important physical characteristic, which will form gas hydrate under certain pressure and temperature, commonly known as combustible ice. In the process of natural gas extraction, since the natural gas at the wellhead contains considerable moisture, when throttling/regulating the natural gas at the wellhead, a pressure difference will be formed at both ends of the regulating valve, and the expansion of the gas will absorb a large amount of heat, forming a local low temperature. The formation of flammable ice will cause freezing and blocking of the regulating valve and nearby pipelines. In addition, when using the regulating valve as the opening and closing valve of the pipeline, because the traditional regulating valve cannot achieve zero leakage when closing (the standard of the regulating valve allows less than 5% Leakage), and it is also easy to form combustible ice to cause freezing of valves and pipelines (in order to solve this problem, the current method is to set up special thawing holes on the gas tree, and use high-pressure pumps to inject into the thawing holes ethanol on ice).

There is no power supply near the existing natural gas wellhead. Due to the limitation of the structure and principle of the current gas tree regulating valve, the regulating valve realizes the opening and closing and opening control of the regulating valve through the wired control of the 4-20ma signal. When the actuator is frozen and blocked, the actuator cannot work and is stuck. Generally, it is impossible to achieve full pressure differential throttling control, that is to say, it cannot work under the pressure differential of the valve pressure resistance level, and the maximum working pressure differential is determined when the valve is manufactured. , and cannot be adjusted as the working conditions change.

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides a fully wireless integrated intermittent smart gas extraction system that is simple to install, high in reliability, free from freezing and blocking, and capable of maximizing the amount of liquid carried by the gas.

The technical scheme that the utility model solves its technical problem adopts is:

An all-wireless integrated intelligent gas production system with open intervals, comprising a gas production tree and a control device, the gas production tree is provided with a casing pressure signal collection device, an oil pressure signal collection device, a flow signal collection device and an adjustment cut-off composite valve, The regulating cut-off compound valve is connected with an electric actuator, and the electric actuator is connected with a power supply mechanism; the casing pressure signal acquisition device includes a casing pressure solar power supply device and a casing pressure transformer electrically connected with the casing pressure solar power supply device. Transmitter and sleeve pressure wireless transmission module; the oil pressure signal acquisition device includes an oil pressure solar power supply device and an oil pressure transmitter and an oil pressure wireless transmission module electrically connected to the oil pressure solar power supply device; the flow signal The acquisition device includes a flow solar power supply device and a differential pressure transmitter and a flow wireless transmitting module electrically connected to the flow solar power supply device; the power supply mechanism includes a main solar power supply device and a battery electrically connected to the main solar power supply device box, the electric actuator is electrically connected to the battery box; the control device includes a wireless transceiver module and a GPRS module, and the wireless transceiver module is wirelessly connected to the sleeve pressure wireless transmitter module, the oil pressure wireless transmitter module and the flow wireless transmitter module. The communication constitutes a wireless local area network; the control device is provided with working power by the main solar power supply device.

The casing pressure signal acquisition device includes a three-way high-pressure joint, one end of the three-way high-pressure joint is connected to the cork of the gas tree, one end is connected to the casing pressure transmitter, and the other end is connected to the gas tree. Pressure Transmitters.

The battery box includes a storage battery, and the storage battery is connected with a charging and discharging protection module.

The regulating cut-off composite valve includes a valve body and a valve cover, the valve body is provided with a valve cavity, an air inlet and an air outlet, a cage is installed in the valve cavity, and an axially movable valve is installed in the cage. The spool is connected with a thrust valve stem protruding from the bonnet; the side wall of the cage is provided with an air inlet connected with the air inlet, and the front end of the cage is provided with There is an air outlet hole communicating with the air outlet passage, a valve core sealing ring is installed at the front end of the valve core to realize zero leakage when closed, and the diameter of the valve core sealing ring is larger than that of the air outlet hole.

The valve core is provided with a pressure guide air channel, one end of the pressure guide air channel is located at the front side of the air intake hole, and the other end is located at the rear side of the air intake hole.

A sleeve core sealing ring is arranged between the side wall of the valve core and the cage, and the sleeve core sealing ring is located at the rear side of the air inlet hole.

A front cavity cover sealing ring is installed between the front end of the cage and the valve cavity, a rear cavity cover sealing ring is installed between the side wall of the cage and the valve cavity, and the rear cavity cover sealing ring is located at the the rear side of the air intake hole.

The electric actuator includes a casing, one end of the casing is installed with a connecting bracket, and the other end is installed with an explosion-proof cylinder, a stepping motor is installed in the explosion-proof cylinder, and a transmission nut is installed in the casing through a double bearing. A threaded thrust screw is installed inside the transmission nut, and one end of the thrust screw extends into the connecting bracket; the stepper motor is connected to the transmission nut through a reducer; the adjustment cut-off composite valve is assembled with an electric actuator Finally, one end of the thrust valve rod extends into the connecting bracket and docks with the thrust screw rod.

The thrust valve stem is provided with a position indicating sheet, and the connecting bracket is provided with a position indicating plate, a front position sensor and a rear position sensor.

The end of the shaft of the stepping motor protrudes from the explosion-proof cylinder, and a hand wheel with a position indicator is installed at the end of the shaft of the stepping motor.

The beneficial effects of the utility model are:

1. All the signal acquisition modules of the utility model adopt independent solar power supply and wireless signal transmission to realize the physical independent installation of all modules, realize zero wiring for signal transmission, simple installation and high reliability. The control device adopts GPRS module or The RTU communicates with the internal network of the oil field or the background on the Internet, and can be automatically/remotely controlled to maximize the amount of liquid carried by the gas and meet various control requirements in the gas well production process.

2. The adjustable cut-off composite valve of the utility model can be combined with a large-thrust electric actuator to realize anti-freezing and high-pressure difference zero leakage. When ice is blocked, the push-pull force of the actuator is enough to crush the frozen objects in the valve, which can completely replace the existing gas production tree. The traditional throttling needle valve has zero leakage of gas after the valve is shut off. When the valve is shut off, it will not cause the natural gas hydrate freezing blockage of the regulating cut-off composite valve and nearby pipelines, which can improve the efficiency of gas production without alcohol injection. Unfreeze jobs.

3. The utility model adopts a new structure of high-thrust electric actuator, so that the thrust of the thrust screw can still be maintained when the stepping motor is powered off. When there is no execution action, the stepping motor does not need to be powered on all the time, which can greatly reduce the number of electric actuators. power consumption.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a schematic diagram of the system structure of the present utility model;

Fig. 2 is a structural schematic diagram of a casing pressure signal acquisition device;

Fig. 3 is a structural schematic diagram of a flow signal acquisition device;

Fig. 4 is a schematic structural view of the combination of the adjustment cut-off compound valve and the electric actuator;

Fig. 5 is the cross-sectional view of adjusting cut-off compound valve;

Figure 6 is a partial enlarged view of Figure 5;

Fig. 7 is a sectional view of the electric actuator.

Detailed ways

Referring to Fig. 1 to Fig. 7, a fully wireless integrated intelligent gas production system with open intervals includes a gas production tree and a control device. The gas production tree is provided with a casing pressure signal collection device 1, an oil pressure signal collection device 2, a flow rate A signal acquisition device 3 and an adjustable cut-off composite valve 4, the adjustable cut-off composite valve 4 is connected with an electric actuator 5, and the electric actuator 5 is connected with a power supply mechanism; the casing pressure signal collection device 1 includes a casing pressure solar power supply device 10 (each solar power supply device is mainly a solar panel and a small battery located in the solar panel and a charge and discharge protection circuit) and a sleeve pressure transmitter 11 and a sleeve pressure wireless transmission module 12 electrically connected to the sleeve pressure solar power supply device 10 The oil pressure signal acquisition device 2 includes an oil pressure solar power supply device 20 and an oil pressure transmitter 21 and an oil pressure wireless transmission module 22 electrically connected to the oil pressure solar power supply device 20; the flow signal acquisition device 3 Including a flow solar power supply device 30 and a differential pressure transmitter 31 electrically connected to the flow solar power supply device 30 and a flow wireless transmitting module 32; the power supply mechanism includes a main solar power supply device 6 and a main solar power supply device 6 Electrically connected battery box 60 (the battery box 60 is buried and installed, and the support pole of the main solar power supply device is integrated with the battery box), the battery box 60 includes a battery 61 (lead-acid battery or low-temperature lithium battery), and the battery 61 A charging and discharging protection module 62 is connected, and the electric actuator 5 is electrically connected to the battery box 60; the control device includes a wireless transceiver module 70 and a GPRS module 71, and the control device is provided by the main solar power supply device 30 Working power.

The wireless transceiver module 70 and the casing pressure wireless transmitting module 12, the oil pressure wireless transmitting module 22 and the flow wireless transmitting module 32 wirelessly communicate to form a wireless local area network for short-distance wireless transmission of signals, and all signal acquisition modules are powered by independent solar energy and Wireless signal transmission enables all modules to be physically installed independently of each other and zero wiring for signal transmission. The control device uses the GPRS module to communicate with the background on the Internet, and can also use the standard RTU to communicate with the internal network of the oil field. The software parameters of the control device can be updated and set remotely through the GPRS module, and can also be monitored in real time with terminals such as computers, tablet computers or mobile phones where there is a network (need to install the corresponding monitoring terminal).

The control mode of the system can be automatic/remote. In the automatic mode, the opening and closing of the electric actuator and the opening control of the cut-off composite valve can be completed according to the control software in the control device according to the oil pressure, casing pressure and flow signals. When the oil pressure of the gas well is insufficient, the regulating cut-off compound valve is closed, and the pressure of the gas well is shut down to restore. The flow signal collected is controlled and adjusted by the control software to adjust the opening of the cut-off compound valve to ensure that the gas flow rate in the wellbore is within the range of the maximum liquid carrying capacity, and it can also be realized by adjusting the cut-off valve according to the casing pressure and oil pressure conditions predetermined by the software. The opening and closing of the composite valve realizes the intermittent control of the gas well, realizes the maximum liquid carrying capacity of the gas, and meets various control requirements in the gas well production process.

There are two modes in the remote mode, one is to use the RS485 transmission method to realize the opening, closing and opening control of the cut-off composite valve through the RTU of the oil field and the digital control network of the oil field, and the other is to use the GPRS module (mobile phone communication network ) in the background to realize the opening, closing and opening control of the adjustment cut-off composite valve.

The casing pressure signal acquisition device 1 includes a three-way high-pressure joint 13, one end of the three-way high-pressure joint 13 is connected to the cork 14 (pressure gauge switch) of the gas tree, and the other end is connected to the casing pressure transmitter 11 , and the other end is connected to the pressure transmitter 15 that comes with the gas tree (the pressure transmitter 15 is the original equipment on the gas tree).

The regulating cut-off composite valve 4 includes a valve body 400 and a valve cover 401, and the valve body 400 and the valve cover 401 are fixed by screws, and the valve body 400 is provided with a valve cavity, an air inlet 403 and an air outlet 404, the A cage 405 is installed in the valve cavity, and an axially movable valve core 406 is installed in the cage 405. The valve core 406 is connected with a thrust valve stem 407 protruding from the valve cover 401. The thrust valve stem 407 and the valve cover 401 are installed with packing 415 for sealing and supporting; the side wall of the cage 405 is provided with an air inlet 408 communicating with the air inlet 403, and the front end of the cage 405 An air outlet hole 409 communicating with the air outlet passage 404 is provided, and a high-strength valve core sealing ring 410 is installed on the front end surface of the valve core 406 (a groove is arranged on the front end surface of the valve core, and the valve core sealing ring is embedded in the groove), the diameter of the valve core sealing ring 410 is larger than the diameter of the air outlet hole 409 . The axial force of the thrust valve stem between the cage and the valve core realizes the function of shearing and crushing the ice-blocked hydrate. The end face of sleeve 405 is compressed and sealed to realize the zero leakage function after the valve is closed.

The spool 406 is provided with a pressure guide air passage 411, one end of the pressure guide air passage 411 is located at the front side of the air intake hole 408, and the other end is located at the rear side of the air intake hole 408, and the pressure guide air passage makes the valve core The equal pressure on both sides of 406 reduces the push and pull force for valve opening and closing.

A high-strength sleeve sealing ring 412 is disposed between the side wall of the valve core 406 and the cage 405 , and the sleeve sealing ring 412 is located at the rear side of the air inlet 408 . A high-strength front chamber seal ring 413 is installed between the front end of the cage 405 and the valve chamber, and a high-strength rear chamber seal ring 414 is installed between the side wall of the cage 405 and the valve chamber The sealing ring 414 of the rear chamber sleeve is located at the rear side of the air inlet 408 to improve the sealing performance of the regulating cut-off composite valve.

The utility model adopts a new structure antifreeze high pressure difference zero leakage regulating cut-off compound valve to replace the traditional throttling needle valve on the gas production tree. After the valve is closed, the gas will leak zero, which will not cause the regulating cut-off compound valve and nearby pipelines Freezing plugging of natural gas hydrate can improve the efficiency of gas production.

The electric actuator 5 includes a housing 500, a connecting bracket 501 is installed at one end of the housing 500, and an explosion-proof cylinder 502 is installed at the other end, and a stepping motor 503 is installed in the explosion-proof cylinder 502 (the stepping motor is provided with a wireless communication module), the casing 500 is equipped with a drive nut 505 through double bearings 504 (two bearings), and a threaded thrust screw 506 is installed in the drive nut 505, and one end of the thrust screw 506 extends into the connection Bracket 501; the stepper motor 503 is connected to the drive nut 505 through a reducer 507 (the drive nut is installed in the nut drive plate 512, and the reducer is connected to the nut drive plate); the adjustment cut-off composite valve 4 and the electric actuator After the device 5 is assembled, one end of the thrust valve rod 407 extends into the connecting bracket 501 and docks with the thrust screw 506 .

The thrust valve rod 407 is provided with a position indicating plate 408, and the connecting bracket 501 is provided with a position indicating plate 508, a front position sensor 509 and a rear position sensor 510, which can provide opening, closing and opening adjustment for the control system.

The end of the shaft of the stepping motor 503 protrudes from the explosion-proof cylinder 502, and a hand wheel 511 with a position indicator is installed at the end of the shaft of the stepping motor 503, which can also be controlled and adjusted manually On, off and opening.

The utility model adopts a new structure of large-thrust electric actuator. Due to the self-locking characteristic of the transmission nut, even if the torque of the transmission nut disappears, the thrust will continue to be maintained. At the same time, the support of the transmission nut adopts a double-bearing support structure to reduce the size of the transmission nut The movement gap of the mechanism keeps the thrust of the thrust screw when the stepper motor 503 loses power, which can greatly reduce the power consumption of the electric actuator, and the stepper motor does not need to be powered on all the time when there is no execution action.

The above embodiments cannot limit the scope of protection of the present invention. The equivalent modifications and changes made by those in the technical field without departing from the overall concept of the utility model still fall within the scope of the present invention. .

Claims (10)

1. intelligent gas production system is opened between a kind of full Wireless integrated form, including christmas tree and control device, it is characterised in that described to adopt Gas tree is provided with casing pressure signal pickup assembly（1）, fuel injection pressure signal harvester（2）, flow rate signal pick device（3）It is cut with adjusting Only combination valve（4）, it is described to adjust cut-off combination valve（4）It is connected with Electric Actuator（5）, the Electric Actuator（5）It is connected with Power supply mechanism；The casing pressure signal pickup assembly（1）Including casing pressure solar power supply apparatus（10）With with the casing pressure solar energy For electric installation（10）The set pressure transmitter of electrical connection（11）And casing pressure wireless transmitter module（12）；The fuel injection pressure signal harvester （2）Including oil pressure solar power supply apparatus（20）With with the oil pressure solar power supply apparatus（20）The oil pressure transmitter of electrical connection （21）And oil pressure wireless transmitter module（22）；The flow rate signal pick device（3）Including flow solar power supply apparatus（30） With with the flow solar power supply apparatus（30）The pressure difference transmitter of electrical connection（31）And flow wireless transmitter module（32）；Institute It states power supply mechanism and includes main solar power supply apparatus（6）With with the main solar power supply apparatus（6）The battery case of electrical connection （60）, the Electric Actuator（5）With the battery case（60）Electrical connection；The control device includes radio receiving transmitting module（70） And GPRS module（71）；The radio receiving transmitting module（70）With casing pressure wireless transmitter module（12）, oil pressure wireless transmitter module （22）With flow wireless transmitter module（32）Wireless communication composition Wireless LAN；The control device is by the main solar energy For electric installation（6）Working power is provided.

2. intelligent gas production system is opened between full Wireless integrated form according to claim 1, it is characterised in that the casing pressure signal Harvester（1）Including three-way pipe high pressure connection（13）, the three-way pipe high pressure connection（13）One termination christmas tree cock （14）, a termination set pressure transmitter（11）, another pressure transmitter for terminating christmas tree and carrying（15）.

3. intelligent gas production system is opened between full Wireless integrated form according to claim 1, it is characterised in that the battery case （60）Including accumulator（61）, the accumulator（61）It is connected with charge and discharge protecting module（62）.

4. intelligent gas production system is opened between full Wireless integrated form according to claim 1, it is characterised in that described to adjust cut-off Combination valve（4）Including valve body（400）And valve deck（401）, the valve body（400）It is provided with valve chamber, air intake duct（403）And gas off-take （404）, cage set is installed in the valve chamber（405）, the cage set（405）The spool being axially movable inside is installed（406）, institute State spool（406）It is connected with and stretches out the valve deck（401）Outer thrust valve rod（407）；The cage set（405）Side wall be provided with With the air intake duct（403）The air admission hole of connection, the cage set（405）Front end be provided with and the gas off-take（404）Connection Venthole（409）, the spool（406）Front end valve core seal ring is installed（410）To realize zero leakage when closing, institute State valve core seal ring（410）Diameter be more than the venthole（409）Diameter.

5. intelligent gas production system is opened between full Wireless integrated form according to claim 4, it is characterised in that the spool（406） It is provided with pilot air flue（411）, the pilot air flue（411）One end be located at the front side of the air admission hole, the other end is located at institute State the rear side of air admission hole.

6. intelligent gas production system is opened between full Wireless integrated form according to claim 4, it is characterised in that the spool（406） Side wall and the cage set（405）Between be provided with set core sealing ring（412）, the set core sealing ring（412）Positioned at it is described into The rear side of stomata.

7. intelligent gas production system is opened between full Wireless integrated form according to claim 4, it is characterised in that the cage set（405） Front end and the valve chamber between be equipped with ante-chamber set sealing ring（413）, the cage set（405）Side wall and valve chamber between install There is back cavity to cover sealing ring（414）, the back cavity set sealing ring（414）Positioned at the rear side of the air admission hole.

8. intelligent gas production system is opened between full Wireless integrated form according to claim 4, it is characterised in that the electronic execution Device（5）Including shell（500）, the shell（500）One end connecting bracket is installed（501）, the other end is equipped with explosion-proof vent （502）, the explosion-proof vent（502）Stepper motor is inside installed（503）, the shell（500）Inside pass through duplex bearing（504）Installation There is transmission nut（505）, the transmission nut（505）The thrust screw rod of screw thread engagement is inside installed（506）, the thrust screw rod （506）One end stretch into the connecting bracket（501）It is interior；The stepper motor（503）Pass through retarder（507）With the transmission Nut（505）Connection；It is described to adjust cut-off combination valve（4）And Electric Actuator（5）After assembling, the thrust valve rod（407）'s The connecting bracket is stretched into one end（501）The interior and thrust screw rod（506）Docking.

9. intelligent gas production system is opened between full Wireless integrated form according to claim 8, it is characterised in that the thrust valve rod （407）On be provided with position instruction piece（408）, the connecting bracket（501）Inside it is provided with position indicator（508）, front position Sensor（509）With rear position sensor（510）.

10. intelligent gas production system is opened between full Wireless integrated form according to claim 8, it is characterised in that the stepper motor （503）The tip of the axis stretch out the explosion-proof vent（502）Outside, and in the stepper motor（503）The tip of the axis be provided with The handwheel of position instruction table（511）.