CN210178337U - Oil well casing gas recovery pressure reducing device - Google Patents
Oil well casing gas recovery pressure reducing device Download PDFInfo
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- CN210178337U CN210178337U CN201921040982.1U CN201921040982U CN210178337U CN 210178337 U CN210178337 U CN 210178337U CN 201921040982 U CN201921040982 U CN 201921040982U CN 210178337 U CN210178337 U CN 210178337U
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Abstract
The oil well casing gas recovering and pressure reducing device belongs to oil well special equipment, including oil pipe and casing pipe in the well head equipment, the oil outlet of oil pipe is connected with oil pipeline, and the gas exhaust port of casing pipe is connected with gas pipeline, its characterized in that: the air exhaust pump assembly is characterized by also comprising an air exhaust pump assembly, wherein the air transmission pipeline is connected with a suction inlet of the air exhaust pump assembly, and a discharge outlet of the air exhaust pump assembly is communicated with the oil transmission pipeline through an exhaust pipe; the exhaust pipe is provided with a first one-way valve; the gas transmission pipeline is provided with a second one-way valve; the air pump assembly can forcibly pump out the natural gas in the sleeve and directly pump the natural gas into the oil pipeline, so that the pressure in the sleeve is reduced, the production pressure difference is amplified, the oil liquid level is improved, the oil increasing effect is achieved, and the natural gas is completely recovered; the oil well casing gas recovery pressure reduction device can recover natural gas with overpressure in the casing, so that the oil field is increased in yield, the operation is reliable, and the installation, use and maintenance costs can be reduced.
Description
Technical Field
The invention relates to a special device for an oil well, and particularly provides an oil well casing gas recovery and pressure reduction device.
Background
In the oil recovery process in oil field, fluid gets into oil pipe in the wellhead assembly and is taken out to ground, have the natural gas to be adopted simultaneously and get into the wellhead assembly, the natural gas gets into in the wellhead assembly oil pipe outlying cover intraductal with the oil separation, when the natural gas pressure in the cover pipe is too high, can make the oil liquid level reduce, lead to the oil recovery volume to descend, in order to make the natural gas pressure in the cover pipe keep at the design value, can reduce the resistance that the oil liquid level upwards moved, need retrieve with unnecessary natural gas in the sleeve pipe with natural gas recovery unit.
Most of the currently used natural gas recovery devices are cylinder type devices, wherein a cylinder body of the cylinder type device is arranged on a derrick, high-pressure natural gas in a sleeve is led into a cylinder, a piston rod in the cylinder body is jacked up by the natural gas and then is pressed down by a walking beam of an oil pumping unit, so that the natural gas in the sleeve is repeatedly pumped; however, because the pressure of the natural gas in the sleeve is unstable, when no natural gas exists in the sleeve or the pressure of the natural gas is low, the piston rod connected with the walking beam drives the piston to continuously operate, the sleeve is vacuumized, the oil outlet resistance is increased, and the applicability and the reliability are poor; and moreover, the air cylinder, the piston and accessories of the device are all arranged at the high positions of the derrick and the walking beam, and the steps of welding reconstruction of the derrick and the like are also involved, so that when the air cylinder type natural gas recovery device is installed, arranged and maintained, a lifting climbing carrier is additionally used and is assisted by a large number of professional technicians and field safety personnel, the installation and use cost is high, the time for stopping the oil pumping unit is long due to the complex assembly and maintenance process, and the periodic oil extraction amount of the oil pumping unit is influenced.
Disclosure of Invention
The utility model aims at providing an oil well cover gas recovery pressure reduction means can retrieve the natural gas of the interior superpressure of sleeve pipe, makes the oil field increase output, and the operation is reliable, can reduce the cost of installation, use and maintenance.
The technical scheme of the utility model is that: oil well cover gas recovery pressure reduction means, oil pipe and sleeve pipe in the well head device are drawn together to the oil-out hookup of oil pipe has oil pipeline, and the hookup of sheathed tube gas vent has gas pipeline, its characterized in that: the air suction pump assembly is characterized by further comprising an air suction pump assembly, the air conveying pipeline is connected with a suction inlet of the air suction pump assembly, and a discharge outlet of the air suction pump assembly is communicated with the oil conveying pipeline through an exhaust pipe.
The exhaust pipe is provided with a first one-way valve.
And a second one-way valve is arranged on the gas transmission pipeline.
The air delivery pipeline is provided with an air pressure sensor, the signal output end of the air pressure sensor is connected with the signal input end of the controller through a first signal line, and the signal output end of the controller is connected with the signal input end of a start-stop control switch in the air pump assembly through a second signal line.
The utility model discloses a theory of operation is: when the air pump assembly works, natural gas in the sleeve is forcibly pumped out and directly pumped into the oil pipeline, so that the pressure in the sleeve is reduced, the production pressure difference is amplified, the oil level is improved, the oil increasing effect can be achieved, and the natural gas is completely recovered.
The utility model has the advantages that:
1) compared with the cylinder structure, the air pump assembly can be installed on the ground on site, saves high-altitude operation, can be installed and maintained in the operating state of the oil pumping unit, and has mature technology, reliable operation and low use and maintenance cost.
2) The second one-way valve has the advantages of preventing gas in the pipeline from flowing back and avoiding the pressure of the sleeve from being out of control.
3) The controller monitors the pressure value in the casing through the air pressure sensor, so that the air pump assembly can be intelligently controlled to be started or closed, negative pressure is prevented from being generated in the casing, and the oil yield of the oil field is guaranteed to be stable.
Drawings
Fig. 1 is a schematic structural diagram of the oil well casing gas recovery pressure reducing device of the utility model.
In the figure, 1 a start-stop control switch, 2 a signal input end of the start-stop control switch, 3 a second signal line, 4 a signal output end of a controller, 5 a controller, 6 a signal input end of the controller, 7 a discharge port of an air pump assembly, 8 an exhaust pipe, 9 an exhaust valve, 10 a first one-way valve, 11 an oil pipeline, an oil outlet of 12 an oil pipeline, 13 a pumping rod, 14 an oil pipeline, 15 a sleeve, 16 a discharge port of the sleeve, 17 an air delivery valve, 18 a second one-way valve, 19 an air delivery pipeline, 20 an air pressure sensor, 21 a signal output end of the air pressure sensor, 22 a suction inlet of the air pump assembly, 23 the air pump assembly, 24 an air pump, 25 a power transmission device, 26 a motor and 27 a first signal.
Detailed Description
The oil well casing gas recovery pressure reduction device comprises an oil pipe 14 and a sleeve 15 in a wellhead device, wherein an oil outlet 12 of the oil pipe is connected with an oil pipeline 11, an exhaust port 16 of the sleeve is connected with a gas pipeline 19, the oil well casing gas recovery pressure reduction device also comprises a suction pump assembly 23, the gas pipeline is connected with a suction inlet 22 of the suction pump assembly, and a discharge port 7 of the suction pump assembly is communicated with the oil pipeline through an exhaust pipe 8; the exhaust pipe is provided with a first one-way valve 10; a second one-way valve 18 is arranged on the gas transmission pipeline; the oil well casing gas recovery and pressure reduction device further comprises a controller 5, an air pressure sensor 20 is arranged on the air transmission pipeline, a signal output end 21 of the air pressure sensor is connected with a signal input end 6 of the controller through a first signal line 27, and a signal output end 4 of the controller is connected with a signal input end 2 of a start-stop control switch 1 in the air pump assembly through a second signal line 3.
The exhaust pipe is provided with an exhaust valve 9, and the gas transmission pipeline is provided with a gas transmission valve 17 for controlling the closing and the conduction of the pipeline, so that the maintenance is convenient. The connection and communication of each pipeline and the pipe and the port can adopt flange sealing connection or welding integration, the air pump assembly comprises an air pump 24 and a motor 26, the motor is preferably an explosion-proof motor, the power output end of the motor is in power connection with the power input end of the air pump, or the power output end of the motor is in power connection with the power input end of the air pump through a power transmission device 25, namely the air pump is driven to run through electric power, the power transmission device is a transmission shaft, a chain wheel and chain mechanism, a universal joint shaft, a belt pulley group or a gearbox and the like, the power supply of the motor adopts field power supply, the field power supply is difficult, a generator device can be assembled, and the generator device comprises: fuel generator, wind generator, hydroelectric generator, solar power module or a combination of the above generator devices. The pipe sleeve is sleeved on an oil pipe, and a pumping rod 13 extends in the oil pipe. The controller is also called an industrial personal computer or a singlechip or a switch controller, at least comprises a computing unit, a storage unit, an interface unit, a power supply unit and the like, belongs to the prior art, a pre-programmed program is stored in the storage unit, and the controller can be also provided with a communication unit, can transmit the working condition information of the oil well casing gas recovery pressure reduction device to a designated receiving terminal through a communication means, and is convenient for remote monitoring of working personnel. The controller can be integrated in a start-stop control switch in the air pump assembly, the controller and the start-stop control switch are arranged on a circuit board or in a control box, and all electric control devices for controlling the work of the air pump assembly by monitoring the air pressure value in the air transmission pipeline fall into the protection range of the application.
Claims (4)
1. Oil well cover gas recovery pressure reduction means, oil pipe (14) and sleeve pipe (15) including among the wellhead assembly, oil-out (12) hookup of oil pipe have oil pipeline (11), and sheathed tube gas vent (16) hookup has gas transmission pipeline (19), its characterized in that: the device also comprises an air pump assembly (23), the air conveying pipeline is connected with a suction inlet (22) of the air pump assembly, and a discharge outlet (7) of the air pump assembly is communicated with the oil conveying pipeline through an exhaust pipe (8).
2. The oil well casing gas recovery depressurization device of claim 1, wherein: the exhaust pipe is provided with a first one-way valve (10).
3. The oil well casing gas recovery depressurization device of claim 1, wherein: and a second one-way valve (18) is arranged on the gas transmission pipeline.
4. The oil well casing gas recovery depressurization device of claim 1, wherein: the air pump assembly is characterized by further comprising a controller (5), wherein an air pressure sensor (20) is arranged on the air delivery pipeline, a signal output end (21) of the air pressure sensor is connected with a signal input end (6) of the controller through a first signal line (27), and a signal output end (4) of the controller is connected with a signal input end (2) of a start-stop control switch (1) in the air pump assembly through a second signal line (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921040982.1U CN210178337U (en) | 2019-07-05 | 2019-07-05 | Oil well casing gas recovery pressure reducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921040982.1U CN210178337U (en) | 2019-07-05 | 2019-07-05 | Oil well casing gas recovery pressure reducing device |
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| Publication Number | Publication Date |
|---|---|
| CN210178337U true CN210178337U (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921040982.1U Active CN210178337U (en) | 2019-07-05 | 2019-07-05 | Oil well casing gas recovery pressure reducing device |
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| CN (1) | CN210178337U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427530A (en) * | 2020-09-22 | 2022-05-03 | 中国石油化工股份有限公司 | Device and method for reducing back pressure in cooperative work with mechanical oil production well |
-
2019
- 2019-07-05 CN CN201921040982.1U patent/CN210178337U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427530A (en) * | 2020-09-22 | 2022-05-03 | 中国石油化工股份有限公司 | Device and method for reducing back pressure in cooperative work with mechanical oil production well |
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