Oil well associated gas discharge aiding device and auxiliary oil and gas production equipment

Abstract

The utility model discloses an oil well associated gas discharge assisting device which comprises a cylinder body, a piston piece, a gas inlet pipe and a gas outlet pipe. The cylinder body is provided with a first cavity, a second cavity, a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe and the liquid outlet pipe are both communicated with the first cavity, the piston piece is located in the second cavity and divides the second cavity into an exhaust cavity and a transition cavity, a first one-way valve is arranged on the piston piece 4, the air inlet pipe comprises a first branch pipe and a second branch pipe, and the first branch pipe is communicated with the exhaust cavity; the second branch pipe is communicated with the transition cavity, the air outlet pipe is connected with the exhaust cavity and the liquid discharging pipe, when the pressure in the air inlet pipe is larger than that of the liquid discharging pipe, air in the first branch pipe is led into the liquid discharging pipe through the exhaust cavity and the air outlet pipe, and when the pressure in the air inlet pipe is smaller than that of the liquid discharging pipe, the piston piece moves towards one side of the second branch pipe. Gas in the transition cavity enters the exhaust cavity through the first one-way valve, when the piston moves towards one side of the first branch pipe, gas in the second branch pipe is introduced into the transition cavity, and gas in the exhaust cavity is introduced into the liquid discharge pipe through the gas outlet pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid transportation, in particular to an oil well associated gas drainage device and auxiliary oil and gas production equipment. Background Art

[0002] Oil production equipment typically consists of production casing and tubing. The production casing extends from the surface to the bottom of the producing rock layer. The tubing is located within the production casing and extends into the oil-liquid area within the casing. The end of the tubing is connected to a pump to extract the bottomhole fluid. The casing pressure within the annular space between the tubing and casing has a certain impact on the production rate of a single well. When the casing pressure is high, gas accumulates in the annular space, the oil level in the well drops, and the submergence of the pump decreases, reducing the pump's fill factor and pumping efficiency, thereby reducing oil production efficiency. When the casing pressure decreases, the oil level in the casing rises, the submergence increases, the pump's fill factor increases, and the amount of produced fluid increases. However, when the casing pressure fluctuates significantly, it can lead to intensified interlayer conflicts within the perforated section of a single well, increasing the water content of individual layers, resulting in an increase in the water content of the produced fluid from the single well and reducing the oil recovery rate.

[0003] In related art, to reduce casing pressure, a bleed valve is installed on the casing. Opening the bleed valve releases high-pressure gas. Reducing casing pressure by directly releasing gas is not only energy-wasting but also environmentally polluting. The oil pipe is connected to a drainage line. Related art also involves connecting an exhaust pipe to the casing, which is then connected to the drainage line to discharge the air inside the casing into the drainage line and out with the produced fluid. However, the air inside the casing can only be discharged when the casing pressure exceeds the oil pressure in the drainage line. Consequently, the amount of air discharged from the casing is small, resulting in poor results.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The embodiments of the present application provide an oil well associated gas drainage device and auxiliary oil and gas production equipment.

[0006] This application provides the following technical solutions:

[0007] The first object of the present application is to provide an oil well associated gas drainage device, comprising:

[0008] a cylinder body, the cylinder body having a first cavity, a second cavity, a liquid inlet pipe and a liquid discharge pipe, the liquid inlet pipe and the liquid discharge pipe are both connected to the cylinder body, and the liquid inlet pipe and the liquid discharge pipe are both in communication with the first cavity;

[0009] a piston member disposed in the second cavity, configured to reciprocate along the cylinder under the action of an external force, the piston member dividing the second cavity into an exhaust cavity and a transition cavity, the piston member being provided with a first one-way valve configured to conduct fluid flow from the transition cavity to the exhaust cavity;

[0010] an intake pipe, the intake pipe comprising a first branch pipe and a second branch pipe, the first branch pipe and the second branch pipe being both connected to the cylinder body, the first branch pipe being connected to the exhaust chamber, and the second branch pipe being connected to the transition chamber;

[0011] an air outlet pipe, one end of which is connected to the exhaust chamber, and the other end of which is connected to the liquid discharge pipe;

[0012] When the pressure in the air inlet pipe is greater than the pressure in the liquid discharge pipe, the gas in the first branch pipe flows into the liquid discharge pipe through the exhaust cavity and the air outlet pipe;

[0013] When the pressure in the intake pipe is lower than the pressure in the liquid discharge pipe, when the piston moves toward the second branch pipe, the gas in the transition chamber enters the exhaust chamber through the first one-way valve; when the piston moves toward the first branch pipe, the gas in the second branch pipe enters the transition chamber, and the gas in the exhaust chamber enters the liquid discharge pipe through the outlet pipe.

[0014] Optionally, a second one-way valve is provided on each of the first branch pipe and the second branch pipe, and the second one-way valve only conducts fluid flow from the air inlet pipe to the second cavity;

[0015] A third one-way valve is provided on the air outlet pipe, and the third one-way valve only conducts the fluid flow from the air outlet pipe to the liquid discharge pipe;

[0016] A fourth one-way valve is provided on the liquid discharge pipe, and the fourth one-way valve is located between the cylinder body and the air outlet pipe. The fourth one-way valve only conducts fluid movement from the cylinder body to the air outlet pipe;

[0017] A fifth one-way valve is provided on the liquid inlet pipe, and the fifth one-way valve only conducts the fluid movement from the liquid inlet pipe to the cylinder body.

[0018] Optionally, the oil well associated gas drainage assisting device includes a movable rod;

[0019] The movable rod is disposed in the cylinder body, and the movable rod extends through the first cavity and the second cavity;

[0020] The piston is sleeved on the movable rod;

[0021] The movable rod is used to move back and forth along the cylinder body under the action of oil pressure to drive the piston to move synchronously.

[0022] Optionally, the oil well associated gas drainage aid device includes an elastic mechanism;

[0023] The cylinder body includes a third cavity, and the third cavity is located on a side of the second cavity away from the first cavity;

[0024] The liquid inlet pipe is connected to the third cavity;

[0025] One end of the movable rod extends to the third cavity, and the other end extends to the first cavity. The movable rod has a lumen that can connect the first cavity and the third cavity.

[0026] Under the action of oil pressure, the movable rod moves toward the first cavity and compresses the elastic mechanism, and the elastic mechanism can be elastically reset to push the movable rod to move toward the third cavity.

[0027] Optionally, one end of the movable rod located in the first cavity is provided with a communication port connecting the first cavity and the tubular cavity;

[0028] A blocking piece is provided on the movable rod, and the blocking piece is used to block or open the communication port;

[0029] The first cavity and the second cavity are separated by a first isolation member;

[0030] When the movable rod moves toward the first cavity and contacts the elastic mechanism, the blocking member opens the communication port;

[0031] During the process of the movable rod moving toward one side of the third cavity, the first isolating member can act on the blocking member, so that the blocking member closes the communication port.

[0032] Optionally, the blocking member includes a sleeve body;

[0033] The sleeve is slidably sleeved on the movable rod. During the reciprocating motion of the movable rod, the sleeve moves corresponding to the movable rod under the action of the elastic mechanism or the first isolating member to open or close the communication port.

[0034] Optionally, the movable rod includes a tubular body, and the tubular body has the tubular cavity;

[0035] The first port of the tube body at one end of the first cavity is closed by an end plate, and the communication port is opened on the tube wall of the tube body in the first cavity;

[0036] One end of the tube body located in the third cavity is provided with a second port communicating with the tube cavity;

[0037] The blocking member is located in the first cavity and is slidably sleeved on the tube body.

[0038] Optionally, the elastic mechanism includes a sleeve and an elastic component arranged inside the sleeve;

[0039] The movable rod moves toward one side of the first cavity, and its end can extend into the sleeve to compress the elastic component, and the sleeve can push the blocking member to move to open the communication port;

[0040] The elastic component can restore its deformation to push the movable rod to move toward one side of the third cavity.

[0041] Optionally, a plurality of first one-way valves are provided on the piston member, and the first one-way valves are sequentially spaced apart along the circumference of the movable rod.

[0042] The second object of the present application is to provide an auxiliary oil and gas production equipment, comprising:

[0043] The above-mentioned oil well associated gas drainage device;

[0044] A production casing, the production casing is used to extend to the underground oil, and the production casing is connected to the air inlet pipe of the oil well associated gas drainage device;

[0045] An oil pipe, wherein the oil pipe portion is located inside the production casing and is connected to the liquid inlet pipe of the oil well associated gas drainage device.

[0046] By adopting the above technical solution, this application has the following beneficial effects:

[0047] In the oil well associated gas drainage device of the present application, when the pressure in the air inlet pipe is greater than the pressure in the drainage pipe, the gas in the first branch pipe passes into the drainage pipe through the exhaust chamber and the air outlet pipe. When the pressure in the air inlet pipe is less than the pressure in the drainage pipe, when the piston moves toward the second branch pipe, the gas in the transition chamber passes into the exhaust chamber through the first one-way valve. When the piston moves toward the first branch pipe, the gas in the second branch pipe passes into the transition chamber, and the gas in the exhaust chamber passes into the drainage pipe through the air outlet pipe. In the oil well associated gas drainage device of the present application, regardless of whether the casing pressure in the production casing of the auxiliary oil and gas production equipment is large or small, the gas in the production casing can be effectively transported to the drainage pipeline. After the gas in the production casing enters the drainage pipeline, a bubble flow is formed, the relative liquid flow resistance is reduced, and the back pressure is reduced.

[0048] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The accompanying drawings are part of this application and are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0050] Figure 1 A schematic diagram of the auxiliary oil and gas production equipment provided in an embodiment of the present application;

[0051] Figure 2 A diagram showing the oil well associated gas drainage device provided in an embodiment of the present application extending from one side of the first cavity to the end thereof into the sleeve;

[0052] Figure 3 A diagram showing a state in which the movable rod of the oil well associated gas drainage assisting device provided by an embodiment of the present application moves toward the third cavity under the elastic force of the elastic component;

[0053] Figure 4 A state diagram of the oil well associated gas drainage assisting device provided in an embodiment of the present application, in which the movable rod moves toward the third cavity, causing the first isolation member to push the blocking member to slide to close the communication port.

[0054] In the figure: 100, oil well associated gas drainage device; 1, cylinder body; 11, first cavity; 12, second cavity; 13, third cavity; 14, first isolation member; 15, second isolation member; 2, liquid inlet pipe; 21, fifth one-way valve; 3, liquid discharge pipe; 31, fourth one-way valve; 4, piston member; 41, first one-way valve; 5, air inlet pipe; 51, first branch pipe; 52, second branch pipe; 53, second one-way valve; 6, air outlet pipe; 61, third one-way valve; 7, movable rod; 71, tube cavity; 72, connecting port; 73, blocking member; 8, elastic mechanism; 81, sleeve; 82, elastic member; 200, production casing; 300, oil pipe; 400, ground; 500, oil level; 600, oil well pump.

[0055] It should be noted that these drawings and text descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0057] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0058] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0059] Figure 1 Schematic diagram of the auxiliary oil and gas production equipment provided in an embodiment of the present application. Figure 2 、 Figure 3 and Figure 4These are three working state diagrams of the oil well associated gas drainage device provided in the embodiments of the present application. The oil well associated gas drainage device 100 includes a cylinder body 1, a piston member 4, an air inlet pipe 5 and an air outlet pipe 6. The cylinder body 1 has a first cavity 11, a second cavity 12, a liquid inlet pipe 2 and a liquid outlet pipe 3. The liquid inlet pipe 2 and the liquid outlet pipe 3 are both connected to the cylinder body 1, and the liquid inlet pipe 2 and the liquid outlet pipe 3 are both connected to the first cavity 11. The piston member 4 is arranged in the second cavity 12. The piston member 4 is used to reciprocate along the cylinder body 1 under the action of external force. The piston member 4 divides the second cavity 12 into an exhaust cavity and a transition cavity. A first one-way valve 41 is provided on the piston member 4. The first one-way valve 41 only conducts the fluid movement from the transition cavity to the exhaust cavity. The air inlet pipe 5 includes a first branch pipe 51 and a second branch pipe 52. The first branch pipe 51 and the second branch pipe 52 are both connected to the cylinder body 1. The first branch pipe 51 is connected to the exhaust cavity. The second branch pipe 52 communicates with the transition chamber. One end of the outlet pipe 6 is connected to the exhaust chamber, and the other end of the outlet pipe 6 is connected to the liquid drain pipe 3. When the pressure in the inlet pipe 5 is greater than the pressure in the liquid drain pipe 3, the gas in the first branch pipe 51 flows into the liquid drain pipe 3 via the exhaust chamber and the outlet pipe 6. When the pressure in the inlet pipe 5 is less than the pressure in the liquid drain pipe 3, when the piston 4 moves toward the second branch pipe 52, the gas in the transition chamber enters the exhaust chamber through the first one-way valve 41. When the piston moves toward the first branch pipe 51, the gas in the transition chamber is under negative pressure, and the gas in the second branch pipe 52 flows into the transition chamber, compressing the gas in the exhaust chamber. The gas in the exhaust chamber then flows into the liquid drain pipe 3 via the outlet pipe 6. The inlet pipe 5 is connected to the production casing 200 of the auxiliary oil and gas production equipment. The liquid inlet pipe 2 is connected to the oil pipe 300 of the auxiliary oil and gas production equipment. The oil well associated gas drainage device 100 of the present application effectively transports the gas within the production casing 200 of the auxiliary oil and gas production equipment to the oil pipeline regardless of whether the casing pressure is high or low. After the gas within the production casing 200 enters the oil pipeline, it forms a bubble flow, which reduces the relative flow resistance of the liquid and lowers the back pressure.

[0060] In some possible embodiments, a second one-way valve 53 is provided on both the first branch pipe 51 and the second branch pipe 52, and the second one-way valve 53 only conducts fluid movement from the air inlet pipe 5 to the second cavity 12; a third one-way valve 61 is provided on the air outlet pipe 6, and the third one-way valve 61 only conducts fluid movement from the air outlet pipe 6 to the liquid discharge pipe 3; a fourth one-way valve 31 is provided on the liquid discharge pipe 3, and the fourth one-way valve 31 is located between the cylinder body 1 and the air outlet pipe 6, and the fourth one-way valve 31 only conducts fluid movement from the cylinder body 1 to the air outlet pipe 6; a fifth one-way valve 21 is provided on the liquid inlet pipe 2, and the fifth one-way valve 21 only conducts fluid movement from the liquid inlet pipe 2 to the cylinder body 1.

[0061] In this embodiment, the first branch pipe 51 and the second branch pipe 52 are connected to the same main pipe, which is connected to the production casing 200. Second check valves 53 are provided on each of the two branch pipes to prevent gas backflow, allowing gas from the production casing 200 to be discharged only, while gas from the cylinder 1 does not flow back into the production casing 200. Similarly, a third check valve 61 is provided on the air outlet pipe 6 to prevent oil from flowing back through the liquid discharge pipe 3. A fourth check valve 31 is provided on the liquid discharge pipe 3 to prevent oil backflow in the oil pipeline, and a fifth check valve 21 is provided on the liquid inlet pipe 2 to prevent oil backflow in the cylinder 1.

[0062] In some possible embodiments, the oil well associated gas drainage device 100 includes a movable rod 7, which is arranged in the cylinder body 1, and the movable rod 7 extends through the first cavity 11 and the second cavity 12. The piston is sleeved on the movable rod 7, and the movable rod 7 is used to move back and forth along the cylinder body 1 under the action of oil pressure to drive the piston to move synchronously.

[0063] In the disclosed embodiment, the movable rod 7 does not need to be driven by a separate external driving mechanism. Instead, the piston can be driven to reciprocate by the oil pressure in the auxiliary oil and gas production equipment. This has a simple structure, does not waste extra energy, and is low cost.

[0064] In some possible embodiments, the oil well associated gas drainage device 100 includes an elastic mechanism 8, which is arranged in the first cavity 11. The cylinder body 1 includes a third cavity 13. The third cavity 13 is located on the side of the second cavity 12 away from the first cavity 11. The liquid inlet pipe 2 is connected to the third cavity 13. One end of the movable rod 7 extends to the third cavity 13, and the other end extends to the first cavity 11. The movable rod 7 has a tubular cavity 71, which can connect the first cavity 11 and the third cavity 13. Under the action of oil pressure, the movable rod 7 moves toward the side of the first cavity 11 and compresses the elastic mechanism 8. The elastic mechanism 8 can be elastically reset to push the movable rod 7 to move toward the side of the third cavity 13.

[0065] In the embodiment of the present application, one end of the movable rod 7 extends into the third cavity 13 and can move toward the side of the first cavity 11 under the action of oil pressure. The elastic mechanism 8 is provided in the second cavity 12 for compressing and deforming the movable rod 7 in the process of moving away from the third cavity 13, and buffering and storing energy. The movable rod 7 has a lumen 71, which can connect the first cavity 11 and the second cavity 12 to balance the oil pressure in the process of the movable rod 7 moving toward the side of the elastic mechanism 8. When the movable rod 7 moves to the extreme position toward the elastic mechanism 8, the deformation of the elastic mechanism 8 reaches the maximum value, and the elastic mechanism 8 begins to restore the deformation, pushing the movable rod 7 to move toward the side of the third cavity 13, thereby realizing the control of the reciprocating motion of the movable rod 7. The oil well associated gas drainage device 100 provided in the embodiment of the present disclosure can work automatically as long as there is pressure, and is not affected by the stroke frequency of the pumping unit, thereby solving the process disadvantages of the constant pressure valve air collection. The oil well associated gas drainage device 100 of the present application can operate the movable rod 7 5-12 times per minute, depending on the pressure of the oil well tubing 300, with the higher the pressure, the greater the frequency. When the oil well pump 600 is operating, pressure is generated in the pipeline. Under this pressure, the check valves automatically open and close, and the piston reciprocates, allowing the produced gas to enter the gathering and transportation process. The oil well associated gas drainage device 100 of the present application has the advantages of easy installation and use, automatic opening, safety, and high efficiency.

[0066] In some possible embodiments, one end of the movable rod 7 located in the first cavity 11 is provided with a connecting port 72 connecting the first cavity 11 and the tubular cavity 71, and a blocking piece 73 is provided on the movable rod 7, and the blocking piece 73 is used to block or open the connecting port 72. The first cavity 11 and the second cavity 12 are separated by a first isolation piece 14, and the second cavity 12 and the third cavity 13 are separated by a second isolation piece 15. When the movable rod 7 moves toward the side of the first cavity 11 and contacts the elastic mechanism 8, the blocking piece 73 opens the connecting port 72. At this time, the third cavity 13 is connected to the first cavity 11, and the oil can flow through the third cavity 13, the tubular cavity 71, and the first cavity 11 in sequence and discharge into the drain pipe 3. During the process of the movable rod 7 moving toward the side of the third cavity 13, the first isolation member 14 can act on the blocking member 73, so that the blocking member 73 closes the connecting port 72. At this time, the internal tube cavity 71 of the movable rod 7 is not connected to the first cavity 11 and the pressure will not be released. Under the action of the oil, the movable rod 7 will be more likely to move along the cylinder body 1 toward the side of the elastic mechanism 8, compressing the elastic mechanism 8.

[0067] In some possible embodiments, the blocking member 73 includes a sleeve that is slidably mounted on the movable rod 7. During the reciprocating motion of the movable rod 7, the sleeve, under the action of the elastic mechanism 8 or the first isolating member, moves the movable rod 7 to open or close the communication port 72. A preload is applied between the blocking member 73 and the movable rod 7. When not in contact with the elastic mechanism 8 or the first isolating member 14, the blocking member 73 and the movable rod 7 maintain a fixed relative position. However, when in contact with the elastic mechanism 8 or the first isolating member 14, the blocking member 73 is pushed and displaced.

[0068] In some possible embodiments, the movable rod 7 includes a tube body, which has the tube cavity 71, and the first port of the tube body located at one end of the first cavity 11 is closed by an end plate, and the connecting port 72 is opened on the tube wall of the tube body located in the first cavity 11, and the second port connected to the tube cavity 71 is provided at one end of the tube body located in the third cavity 13, and the blocking member 73 is located in the first cavity 11, and the blocking member 73 can be slidably mounted on the tube body.

[0069] The elastic mechanism 8 includes a sleeve 81 and an elastic member 82 disposed inside the sleeve 81. The elastic member 82 may be a spring. When the movable rod 7 moves toward the first cavity 11, its end extends into the sleeve 81 to compress the elastic member 82. The sleeve 81 pushes the blocking member 73 to move, thereby opening the communication port 72. The elastic member 82 then recovers its deformation to push the movable rod 7 toward the third cavity 13.

[0070] It should be noted that the inner diameter of the sleeve 81 can be larger than the outer diameter of the movable rod 7, but smaller than the outer diameter of the blocking member 73. When the end of the movable rod 7 is inserted into the sleeve 81, the end plate of the tube body can push against and squeeze the elastic component 82, while the blocking member 73 cannot enter the sleeve 81. The sleeve 81 will push the blocking member 73 to slide along the movable rod 7, so that the connecting port 72 is opened. At this time, the oil inside the movable rod 7 will enter the first cavity 11 through the connecting port 72, and then enter the drain pipe 3.

[0071] In some possible implementation schemes, a plurality of first one-way valves 41 are provided on the piston member 4 , and the first one-way valves 41 are arranged in sequence along the circumference of the movable rod 7 . By providing a plurality of first one-way valves 41 , the gas flow rate can be increased.

[0072] like Figure 1As shown, the disclosed embodiment also provides auxiliary oil and gas production equipment, including: production casing 200, oil pipe 300, and the aforementioned oil well associated gas drainage device 100. The production casing 200 is used to extend to the oil at the bottom of the ground 400. The production casing 200 is connected to the air inlet pipe 5 of the oil well associated gas drainage device 100. The oil pipe 300 is partially located within the production casing 200, with the end of the oil pipe 300 below the oil liquid level 500 and equipped with a pump 600. The oil pipe 300 is connected to the liquid inlet pipe 2 of the oil well associated gas drainage device 100.

[0073] The oil well associated gas drainage device 100 of the present application effectively transports the gas within the production casing 200 of the auxiliary oil and gas production equipment to the drainage pipeline, regardless of whether the casing pressure within the production casing 200 is high or low. Once the gas within the production casing 200 enters the drainage pipeline, it forms a bubble flow, reducing the relative resistance to liquid flow and lowering back pressure. The auxiliary oil and gas production equipment of the present application offers advantages such as easy installation and use, automatic opening control, safety, and high efficiency.

[0074] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments using the above-mentioned technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. An oil well associated gas drainage device, characterized in that: include: a cylinder body, the cylinder body having a first cavity, a second cavity, a liquid inlet pipe and a liquid discharge pipe, the liquid inlet pipe and the liquid discharge pipe are both connected to the cylinder body, and the liquid inlet pipe and the liquid discharge pipe are both in communication with the first cavity; a piston member disposed in the second cavity, configured to reciprocate along the cylinder under the action of an external force, the piston member dividing the second cavity into an exhaust cavity and a transition cavity, the piston member 4 being provided with a first one-way valve, the first one-way valve conducting fluid flow from the transition cavity to the exhaust cavity; an intake pipe, the intake pipe comprising a first branch pipe and a second branch pipe, the first branch pipe and the second branch pipe being both connected to the cylinder body, the first branch pipe being connected to the exhaust chamber, and the second branch pipe being connected to the transition chamber; an air outlet pipe, one end of which is connected to the exhaust chamber, and the other end of which is connected to the liquid discharge pipe; When the pressure in the air inlet pipe is greater than the pressure in the liquid discharge pipe, the gas in the first branch pipe flows into the liquid discharge pipe through the exhaust cavity and the air outlet pipe; When the pressure in the intake pipe is lower than the pressure in the liquid discharge pipe, when the piston moves toward the second branch pipe, the gas in the transition chamber enters the exhaust chamber through the first one-way valve; when the piston moves toward the first branch pipe, the gas in the second branch pipe enters the transition chamber, and the gas in the exhaust chamber enters the liquid discharge pipe through the outlet pipe.

2. The oil well associated gas drainage device according to claim 1, characterized in that: A second one-way valve is provided on each of the first branch pipe and the second branch pipe, and the second one-way valve only conducts the flow of fluid from the air inlet pipe to the second cavity; A third one-way valve is provided on the air outlet pipe, and the third one-way valve only conducts the fluid flow from the air outlet pipe to the liquid discharge pipe; A fourth one-way valve is provided on the liquid discharge pipe, and the fourth one-way valve is located between the cylinder body and the air outlet pipe. The fourth one-way valve only conducts fluid movement from the cylinder body to the air outlet pipe; A fifth one-way valve is provided on the liquid inlet pipe, and the fifth one-way valve only conducts the fluid movement from the liquid inlet pipe to the cylinder body.

3. The oil well associated gas drainage device according to claim 2, characterized in that: Includes movable pole; The movable rod is disposed in the cylinder body, and the movable rod extends through the first cavity and the second cavity; The piston is sleeved on the movable rod; The movable rod is used to move back and forth along the cylinder body under the action of oil pressure to drive the piston to move synchronously.

4. The oil well associated gas drainage device according to claim 3, characterized in that: comprising an elastic mechanism, wherein the elastic mechanism is arranged in the first cavity; The cylinder body includes a third cavity, and the third cavity is located on a side of the second cavity away from the first cavity; The liquid inlet pipe is connected to the third cavity; One end of the movable rod extends to the third cavity, and the other end extends to the first cavity. The movable rod has a lumen that can connect the first cavity and the third cavity. Under the action of oil pressure, the movable rod moves toward the first cavity and compresses the elastic mechanism, and the elastic mechanism can be elastically reset to push the movable rod to move toward the third cavity.

5. The oil well associated gas drainage device according to claim 4, characterized in that: One end of the movable rod located in the first cavity is provided with a communication port connecting the first cavity and the tubular cavity; A blocking piece is provided on the movable rod, and the blocking piece is used to block or open the communication port; The first cavity and the second cavity are separated by a first isolation member; When the movable rod moves toward the first cavity and contacts the elastic mechanism, the blocking member opens the communication port; During the process of the movable rod moving toward one side of the third cavity, the first isolating member can act on the blocking member, so that the blocking member closes the communication port.

6. The oil well associated gas drainage device according to claim 5, characterized in that: The blocking member includes a sleeve body; The sleeve is slidably sleeved on the movable rod. During the reciprocating motion of the movable rod, the sleeve moves corresponding to the movable rod under the action of the elastic mechanism or the first isolating member to open or close the communication port.

7. The oil well associated gas drainage device according to claim 6, characterized in that: The movable rod includes a tubular body, and the tubular body has the tubular cavity; The first port of the tube body at one end of the first cavity is closed by an end plate, and the communication port is opened on the tube wall of the tube body in the first cavity; One end of the tube body located in the third cavity is provided with a second port communicating with the tube cavity; The blocking member is located in the first cavity and is slidably sleeved on the tube body.

8. The oil well associated gas drainage device according to claim 5, characterized in that: The elastic mechanism includes a sleeve and an elastic component arranged inside the sleeve; The movable rod moves toward one side of the first cavity, and its end can extend into the sleeve to compress the elastic component, and the sleeve can push the blocking member to move to open the communication port; The elastic component can restore its deformation to push the movable rod to move toward one side of the third cavity.

9. The oil well associated gas drainage device according to any one of claims 3 to 8, characterized in that: A plurality of first one-way valves are arranged on the piston member, and the first one-way valves are arranged in sequence and spaced apart along the circumference of the movable rod.

10. An auxiliary oil and gas production equipment, characterized in that: include: The oil well associated gas drainage device according to any one of claims 1 to 9; A production casing, the production casing is used to extend to the underground oil, and the production casing is connected to the air inlet pipe of the oil well associated gas drainage device; An oil pipe, wherein the oil pipe portion is located inside the production casing and is connected to the liquid inlet pipe of the oil well associated gas drainage device.

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