Automatic forced drainage and recovery swabbing operation device

Abstract

The invention discloses an automatic forced-discharge recovery swabbing operation device which comprises a blowout prevention unit, a gas detector is arranged at the top end of the blowout prevention unit, the top end of the blowout prevention unit is further communicated with a grease injector through a pipeline, the grease injector and the gas detector are jointly and electrically connected with a controller, and a supporting frame is arranged on one side of the blowout prevention unit. A top pulley and a bottom pulley are respectively arranged above the top end and on one side of the bottom end of the support frame, the top pulley and the bottom pulley are jointly connected with a steel cable, the upper end of the steel cable downwards extends into the gas production tree through the blowout prevention unit, the lower end of the steel cable penetrates through the Martin decker and then is connected with a winch unit, and the winch unit and the Martin decker are both electrically connected to the controller. The speed, the length and the load of the steel cable are detected through Martin-decker, and the purposes of automatically controlling lifting, lowering, slow lowering and stopping lowering of the steel cable and a swabbing tool are achieved through judgment of the controller; combustible gas leakage is detected through the gas detector, judgment is conducted through the controller, the steel cable is dynamically sealed through the grease injector, and efficient unattended swabbing operation is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas field development and production process devices, and in particular relates to an automated forced drainage and recovery pumping operation device. Background Art

[0002] In the middle and late stages of natural gas well development and production, the amount of liquid accumulated in the wellbore will gradually increase, which will cause a decrease in gas well production and eventually lead to the shutdown of the gas well due to excessive liquid accumulation. In order to solve the problem of liquid accumulation in the well, it is necessary to increase the gas production rate through drainage and pumping operations. The existing pumping equipment cannot realize the automatic pumping function, and the on-site operation needs to be realized through human operation. The efficiency of the pumping operation depends entirely on the skill level of the operator, and it cannot realize unmanned operation and other functions, which does not meet the actual needs of oil and gas fields at this stage to reduce costs and increase efficiency. Therefore, it is urgent to develop an automated unmanned pumping equipment to complete the requirements of related operations. Summary of the invention

[0003] The purpose of the present invention is to provide an automated forced drainage and recovery pumping operation device, which solves the problem of low efficiency of existing manually operated pumping operations.

[0004] The technical solution adopted in the present invention is: an automated forced discharge and recovery pumping operation device, including a blowout prevention unit fixedly connected to the top of the gas production tree, a gas detector is arranged on the top of the blowout prevention unit, and a grease injector is also connected to the top of the blowout prevention unit through a pipeline, the grease injector and the gas detector are electrically connected to a controller, a support frame is arranged on one side of the blowout prevention unit, a sky pulley and a ground pulley are respectively arranged above the top and one side of the bottom of the support frame, the sky pulley and the ground pulley are jointly connected to a steel cable whose upper end extends downward into the gas production tree through the blowout prevention unit, the lower end of the steel cable is connected to a winch unit after passing through Martindike, and the winch unit and Martindike are both electrically connected to the controller.

[0005] The present invention is also characterized in that:

[0006] The blowout preventer unit includes a blowout preventer fixedly connected to the gas tree, and a lower catcher, a blowout preventer, a union joint, an upper catcher, a damping device and a blowout preventer box are fixedly connected upward in sequence on the blowout preventer. The gas detector is located on one side of the top opening of the blowout preventer box, and the grease injector is connected to the blowout preventer box through a pipeline.

[0007] The controller is electrically connected to an electric cock valve arranged on the gas production tree and a blowout preventer electric control switch arranged on the blowout preventer.

[0008] The gas tree is provided with a pressure sensor and a gas-liquid flow meter which are electrically connected to the controller.

[0009] The winch unit comprises a winch drum connected to the lower end of the steel cable, one end of the winch drum is coaxially fixedly connected to a variable frequency motor, and the variable frequency motor is provided with a frequency converter electrically connected to the controller.

[0010] The grease injector, controller, winch unit and Martindike are installed in the room.

[0011] An alarm is provided on one side of the gas detector.

[0012] The beneficial effects of the present invention are as follows: the automated forced drainage and recovery pumping operation device of the present invention detects the speed (lowering, lifting), length (lowering, lifting), load (tension) and other parameters of the steel cable through Martindike, and controls the rotation, slow braking or shutdown of the winch after judgment by the controller, so as to achieve the purpose of automatically controlling the lifting and lowering, slowing down and stopping the lowering of the steel cable and the pumping tool; the combustible gas leakage parameters are detected by the gas detector, and after judgment by the controller, the steel cable is dynamically sealed by the grease injector, and combined with the monitored gas production tree data, a data report is formed and transmitted remotely, so as to realize efficient unattended pumping operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the automated forced drainage and recovery pumping operation device of the present invention;

[0014] Figure 2 It is a schematic diagram of the control principle of the automated forced drainage and recovery pumping operation device of the present invention.

[0015] In the figure, 1. grease injector, 2. controller, 3. winch unit, 4. Martindike, 5. ground pulley, 6. overhead pulley, 7. gas detector, 8. alarm, 9. blowout preventer box, 10. damping device, 11. upper catcher, 12. union, 13. blowout preventer, 14. support frame, 15. lower catcher, 16. blowout preventer, 17. casing pressure gauge, 18. pressure sensor, 19. oil pressure gauge, 20. pressure sensor, 21. electric plug valve, 22. gas-liquid flow meter, 23. blowout preventer electric control switch;

[0016] 31. Winch drum, 32. Variable frequency motor, 33. Frequency converter. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Example 1

[0019] The present invention provides an automated forced drainage and recovery pumping device, such as Figure 1 and Figure 2As shown, it includes a grease injector 1, a PLC controller 2, a winch unit 3 and a Martindike 4 arranged in the room body on one side of the gas tree, and the first three are welded to the bottom plate of the room body. A blowout prevention unit is arranged above the gas tree, and a gas detector 7 is arranged at the top of the blowout prevention unit. An alarm 8 is arranged on one side of the gas detector 7 in linkage, which can be linked to the alarm when the combustible gas leaks, playing a warning role. The top of the blowout prevention unit is also connected to the grease injector 1 through a pipeline, and the grease injector 1 and the gas detector 7 are electrically connected to the controller 2. A support frame 14 is arranged on one side of the blowout prevention unit, and a sky pulley 6 and a ground pulley 5 are arranged above the top and on one side of the bottom of the support frame 14, respectively. The sky pulley 6 and the ground pulley 5 are jointly connected to a steel cable whose upper end extends downward into the gas tree through the blowout prevention unit, and the lower end of the steel cable passes through the Martindike 4 and is connected to the winch unit 3, and the winch unit 3 and the Martindike 4 are both electrically connected to the controller 2. The controller 2 is electrically connected to an electric plug valve 21 provided on the gas production tree and a blowout preventer electric control switch 23 provided on the blowout preventer 16. The gas production tree is provided with pressure sensors 18, 20 and a gas-liquid flow meter 22 electrically connected to the controller 2. The pressure sensor 18 is provided on the casing pressure gauge 17, and the pressure sensor 20 is provided on the oil pressure gauge 19.

[0020] Through the above-mentioned method, the automatic forced drainage and recovery pumping operation device of the present invention detects the speed (lowering, lifting), length (lowering, lifting), load (tension) and other parameters of the steel cable through Martin Dyke 4, and controls the winch to rotate, slow brake or stop after the controller 2 determines, so as to achieve the purpose of automatically controlling the lifting and lowering, slowing down and stopping the lowering of the steel cable and the pumping tool; the combustible gas leakage parameters are detected by the gas detector 7, and after the controller 2 determines, the grease is injected into the blowout preventer box 9 through the grease injector 1 to dynamically seal the steel cable. In addition, combined with the wellhead casing pressure monitored by the casing pressure gauge 17 and the pressure in the oil pipe monitored by the oil pressure gauge 19, the measured pressure is converted into an electrical signal and transmitted to the controller 2 through the pressure sensor 18 and the pressure sensor 20, and the liquid discharge and gas production monitored by the gas-liquid flowmeter 22, a data report is formed and transmitted remotely, so as to realize efficient unattended pumping operation. In addition, the switch of the electric plug valve 21 and the blowout preventer electric control switch 23 can be controlled by the controller 2 to realize remote operation.

[0021] Example 2

[0022] In the automatic forced drainage recovery pumping operation device of the present invention, the grease injector 1 is mainly composed of a grease injection seal control head, an electric air compressor, a seal head grease injection pipeline, a seal head return pipeline, a grease delivery pump system, an overflow pipeline, a circulation tee, etc. The controller 2 detects the leakage of the combustible gas at the blowout prevention box 9 through the gas detector 7, thereby controlling the grease injector 1 to start grease injection into the blowout prevention box 9.

[0023] The winch unit 3 includes a winch drum 31 connected to the lower end of the steel cable, and a variable frequency motor 32 is coaxially fixedly connected to one end of the winch drum 31. A frequency converter 33 electrically connected to the controller 2 is provided on the variable frequency motor 32. The AC variable frequency motor 32 is driven by power, and the power is transmitted to the winch drum 31 through a drum-type gear coupling after being reduced by a vertical gear first-speed reduction box. The winch is a pry-type structure with a compact structure and can be hoisted and transported as a whole. The winch adopts a motor energy consumption braking type, and an electromagnetic power-off brake is provided at the rear shaft end of the motor to achieve braking when the system is powered off. The winch gear reduction box adopts a built-in oil tank splash lubrication, and does not require an external oil tank and lubricating oil pump, reducing the risk of lubricating oil leakage.

[0024] The blowout prevention unit includes a blowout preventer 16 fixedly connected to the gas production tree, and the blowout preventer 16 is fixedly connected in sequence with a lower catcher 15, a blowout preventer 13, a union 12, an upper catcher 11, a damping device 10 and a blowout preventer box 9. The gas detector 7 is located on the top opening side of the blowout preventer box 9, and the grease injector 1 is connected to the blowout preventer box 9 through a pipeline. Among them, the blowout preventer box 9, through which the steel wire first passes, contains packing (rubber core) to prevent liquid or gas from overflowing, realizes static sealing, and prevents pollution of the work site; the damping device 10 contains a steel wire channel, and during the pumping operation, dynamic sealing can be realized in the component after continuous grease injection; the upper catcher 11 contains a buffer device, which can play a buffering role when the tool string is lifted too fast, to prevent accidents caused by excessive speed; the union 12 is a connecting joint of the blowout preventer 13, which is convenient for the installation between two sections of the blowout preventer 13 and disassembly; the blowout preventer 13 accommodates the pumping tool string during operation. In order to ensure a sealing link between the downhole and the surface before and after the operation, thereby achieving the pumping effect, after the operation is completed, the tool string is hoisted into the blowout preventer 13, the gas tree valve is closed to shut in the well, the pressure is released through the blowout preventer 13, the blowout preventer 13 is removed, the tool string is taken out, and the operation is completed; the lower catcher 15 can detect whether the tool string has reached the blowout preventer 13; the blowout preventer 16 is a safety sealing wellhead device used to prevent blowouts. The above parts are connected in sequence by threads.

[0025] Example 3

[0026] When the automatic forced drainage and recovery pumping device of the present invention is in operation, Martindike 4 detects that the speed of the steel cable is too fast / slow, and transmits a signal to the controller 2. After the controller 2 determines, it controls the frequency conversion motor 32 to slow down or speed up the speed through the frequency converter 33, so that the winch drum 31 brakes or rotates slowly; similarly, Martindike 4 detects that the length of the steel cable is too long, and after the controller 2 determines, it controls the frequency conversion motor 32 to reverse through the frequency converter 33, so that the steel cable is lifted or lowered through the winch drum 31; Martindike 4 detects that the upward pulling force of the steel cable is too large, and after the controller 2 determines, it controls the frequency conversion motor 32 to reverse through the frequency converter 33, and the steel cable is lowered to discharge part of the liquid downward to relieve the pressure. In the above process, if the gas detector 7 detects that the combustible gas leakage at the outlet of the blowout preventer 9 exceeds the standard, it transmits a signal to the controller 2. After the controller 2 determines, it controls the grease injector 1 to inject grease into the blowout preventer 9, so as to dynamically seal the steel cable.

Claims

1. Automated forced drainage and recovery pumping device, characterized in that: The invention comprises a blowout prevention unit fixedly connected to the top of a gas production tree, a gas detector (7) being arranged at the top of the blowout prevention unit, a grease injector (1) being also connected to the top of the blowout prevention unit through a pipeline, the grease injector (1) and the gas detector (7) being electrically connected to a controller (2), a support frame (14) being arranged on one side of the blowout prevention unit, a sky pulley (6) and a ground pulley (5) being arranged above the top and on one side of the bottom of the support frame (14), the sky pulley (6) and the ground pulley (5) being connected to a steel cable whose upper end extends downward through the blowout prevention unit into the gas production tree, the lower end of the steel cable passing through a Martin Dyke (4) being connected to a winch unit (3), the winch unit (3) and the Martin Dyke (4) being electrically connected to the controller (2).

2. The automated forced drainage and recovery pumping device according to claim 1, characterized in that: The blowout prevention unit comprises a blowout preventer (16) fixedly connected to the gas tree, a lower catcher (15), a blowout preventer (13), a union (12), an upper catcher (11), a damping device (10) and a blowout prevention box (9) fixedly connected in sequence upward on the blowout preventer (16), a gas detector (7) is located at one side of the top opening of the blowout prevention box (9), and a grease injector (1) is connected to the blowout prevention box (9) through a pipeline.

3. The automated forced drainage and recovery pumping device according to claim 2, characterized in that: The controller (2) is electrically connected to an electric cock valve (21) arranged on the gas tree and a blowout preventer electric control switch (23) arranged on the blowout preventer (16).

4. The automated forced drainage and recovery pumping device according to claim 1, characterized in that: The gas tree is provided with a pressure sensor (18, 20) and a gas-liquid flow meter (22) which are electrically connected to the controller (2).

5. The automated forced drainage and recovery pumping device according to claim 1, characterized in that: The winch unit (3) comprises a winch drum (31) connected to the lower end of the steel cable, one end of the winch drum (31) is coaxially fixedly connected to a variable frequency motor (32), and the variable frequency motor (32) is provided with a frequency converter (33) electrically connected to the controller (2).

6. The automated forced drainage and recovery pumping device according to claim 1, characterized in that: The grease injector (1), the controller (2), the winch unit (3) and the Martindike (4) are arranged together in the room.

7. The automated forced drainage and recovery pumping device according to claim 1, characterized in that: An alarm (8) is provided in linkage with one side of the gas detector (7).

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