Pressurizing device for gas lift process of oil and gas well

Abstract

The utility model belongs to the technical field of oil and gas exploitation, and particularly relates to an oil and gas well gas lift process supercharging device. The oil and gas well gas lift process supercharging device comprises a box body; the buffer tank is fixedly arranged in the box body, an air inlet pipe, a blow-off pipe and an exhaust pipe are connected to the buffer tank, the air inlet pipe and the blow-off pipe both extend to the outside of the box body, and the air inlet pipe is connected with a compressor in a slipknot connection mode; the buffer manifold is fixedly arranged in the box body, an inlet of the buffer manifold is connected with the exhaust pipe, an outlet of the buffer manifold is provided with a plurality of gas injection pipes, all the gas injection pipes extend to the outside of the box body, and all the gas injection pipes are connected with all production gas wells in a slipknot connection mode. According to the utility model, the time required for equipment installation can be saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas exploitation, and specifically relates to a pressurizing device for gas lift technology in oil and gas wells. Background Art

[0002] With years of exploitation of oil and gas fields, the formation energy gradually decreases, resulting in liquid accumulation in the wellbores of some oil and gas wells, and they cannot carry liquid for normal production. When the liquid accumulation reaches a certain level, it will cause the oil and gas wells to stop production. To reduce the liquid accumulation in the oil and gas wellbores, it is necessary to discharge it from the wellbore as soon as possible to maintain the normal production of the oil and gas wells. Currently, the main method for discharging the liquid accumulation in low-pressure oil and gas wells is to use the gas lift technology in oil and gas wells for pressurized gas lift drainage.

[0003] In recent years, with the development of gas lift technology, a series of gas lift technologies or systems have emerged. For example, a shale gas gas lift pressurization system disclosed in Chinese Patent Document CN217813411U, an exhaust-gas lift combined process design method and its process flow disclosed in Chinese Patent Document CN113389525A, and a gas lift gas supply system for oil production disclosed in Chinese Patent Document CN217602638U.

[0004] However, most of the existing gas lifts are process flows, lacking specific designs for structures. In the actual working process, the equipment used in the entire process flow occupies a large area, and the connection between each piece of equipment cannot be carried out quickly. A large amount of time is required to assemble the equipment used in the process flow before each operation. Summary of the Utility Model

[0005] Aiming at the above technical problems, the utility model aims to provide a pressurizing device for gas lift technology in oil and gas wells, which can solve at least one of the above problems.

[0006] According to the utility model, a pressurizing device for gas lift technology in oil and gas wells is provided, including:

[0007] A box body;

[0008] A buffer tank, which is fixedly arranged in the box body. An inlet pipe, a sewage discharge pipe and an exhaust pipe are connected to the buffer tank. Both the inlet pipe and the sewage discharge pipe extend to the outside of the box body, and the inlet pipe is connected to a compressor by a quick coupling connection;

[0009] A buffer manifold, which is fixedly arranged in the box body. The inlet of the buffer manifold is connected to the exhaust pipe. A plurality of injection pipes are arranged at the outlet of the buffer manifold. Each injection pipe extends to the outside of the box body, and each injection pipe is connected to each production gas well by a quick coupling connection.

[0010] In a preferred embodiment, first double doors, second double doors, and third double doors are respectively arranged on three side walls of the box body.

[0011] In a preferred embodiment, a first pressure relief pipe is connected to the upper part of the buffer tank, and a first safety valve is arranged on the first pressure relief pipe.

[0012] In a preferred embodiment, a vent pipe is connected to the buffer manifold, and the first pressure relief pipe is connected to the vent pipe.

[0013] In a preferred embodiment, a second pressure relief pipe is connected to the buffer manifold, and a second safety valve is arranged on the second pressure relief pipe.

[0014] In a preferred embodiment, the second pressure relief pipe is connected to the vent pipe.

[0015] In a preferred embodiment, a check valve, a flow meter, and a first ball valve are sequentially arranged on the inlet pipe along the gas flow direction.

[0016] In a preferred embodiment, a first pressure gauge is arranged on the buffer tank.

[0017] In a preferred embodiment, a local pressure gauge and a remote pressure gauge are arranged on the buffer manifold.

[0018] In a preferred embodiment, a control cabinet is arranged in the box body. The control cabinet includes a housing and an explosion-proof cabinet arranged in the housing. A partition is arranged horizontally in the housing, and the explosion-proof cabinet is located above the partition. A plurality of interfaces are arranged at the bottom of the box body, and each of the interfaces is connected to the explosion-proof cabinet.

[0019] Compared with the prior art, the advantages of the present application are as follows.

[0020] The utility model adopts containerized processing, and the buffer tank, valve group, control cabinet, etc. are assembled into a skid, so as to miniaturize the device. The utility model is provided with eight injection pipes, and has the function of simultaneously performing pressurized gas lift operations on eight wells of a cluster well platform.

[0021] In addition, during the working process, the utility model can be quickly connected to a compressor and a production gas well. The utility model is designed with double doors, which is convenient for maintenance. Using the utility model can achieve the purposes of stable and increased production of gas wells, reduced handling cost, shortened installation and disassembly time, and convenient maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present utility model will be described below with reference to the accompanying drawings.

[0023] Figure 1Shows a schematic diagram of an embodiment of the gas lift process pressurization device for oil and gas wells according to the present utility model;

[0024] Figure 2 Shows a schematic flow diagram of an embodiment of the gas lift process pressurization device for oil and gas wells according to the present utility model;

[0025] Figure 3 Shows a connection schematic diagram of an embodiment of the buffer manifold according to the present utility model;

[0026] Figure 4 Shows a schematic diagram of an embodiment of the control cabinet according to the present utility model.

[0027] In the figure: 1. Box body; 11. First pair of opening doors; 12. Second pair of opening doors; 13. Third pair of opening doors; 2. Buffer tank; 21. Inlet pipe; 211. Check valve; 212. Flow meter; 213. First ball valve; 22. Drain pipe; 23. Exhaust pipe; 24. First pressure relief pipe; 25. First safety valve; 26. First pressure gauge; 3. Buffer manifold; 31. Injection pipe; 32. Vent pipe; 33. Second pressure relief pipe; 34. Second safety valve; 35. Local pressure gauge; 36. Remote pressure gauge; 4. Control cabinet; 41. Outer shell; 42. Explosion-proof cabinet; 43. Partition; 44. Power supply connector; 45. First control connector; 46. Second control connector; 47. Third control connector; 48. Conducting wire; 5. Compressor; 100. Gas lift process pressurization device for oil and gas wells.

[0028] In this application, all the drawings are schematic drawings, only used to illustrate the principle of the present utility model and not drawn to actual scale. Detailed implementation manners

[0029] The present utility model will be introduced below with reference to the drawings.

[0030] It should be noted that the directional terms or limiting words such as "upper", "lower", "front", "rear", "left", "right", etc. used in this application are all with reference to the drawings. They do not limit the absolute positions of the components involved, but can vary according to specific situations.

[0031] Figure 1 Shows the structure of the gas lift process pressurization device 100 for oil and gas wells according to the present utility model. As Figure 1 shown, the gas lift process pressurization device 100 for oil and gas wells includes a box body 1, a buffer tank 2 and a buffer manifold 3.

[0032] In this embodiment, the box body 1 is a square structure with a cavity, and a first pair of opening doors 11, a second pair of opening doors 12 and a third pair of opening doors 13 are respectively arranged on three side walls of the box body 1. Specifically, as Figure 1As shown in the figure, a first pair of opening doors 11 are provided on the left side wall of the box body 1, a second pair of opening doors 12 are provided on the front side wall of the box body 1, and a third pair of opening doors 13 are provided on the right side wall of the box body 1.

[0033] The buffer tank 2 is fixedly arranged inside the box body 1, on the left side inside the box body 1. After opening the first pair of opening doors 11, the buffer tank 2 can be repaired.

[0034] As Figure 1 and Figure 2 shown in the figure, an air inlet pipe 21, a blowdown pipe 22 and an exhaust pipe 23 are connected to the buffer tank 2, and both the air inlet pipe 21 and the blowdown pipe 22 extend to the outside of the box body 1. Specifically, the air inlet pipe 21 and the blowdown pipe 22 pass through the bottom plate of the box body 1 and thus extend to the outside of the box body 1. And after the air inlet pipe 21 extends out of the box body 1, it is connected to the compressor 5 by a quick coupling connection.

[0035] In a preferred embodiment, the air inlet pipe 21 and the blowdown pipe 22 pass through the box body 1 from below. After extending to the outside of the box body 1, they both continue to extend to the left for easy connection to other equipment.

[0036] In a preferred embodiment, the air inlet pipe 21 is connected to the compressor 5 through a quick connector (not shown in the figure), and the compressor 5 conveys the gas required for the gas injection process into the buffer tank 2.

[0037] Under the action of the quick connector, the air inlet pipe 21 can be quickly disassembled and assembled with the compressor 5. Among them, the specific structure of the quick connector is the prior art and will not be elaborated here.

[0038] According to the present utility model, as Figure 1 shown in the figure, the buffer pipe manifold 3 is fixedly arranged inside the box body 1, on the right side of the buffer tank 2. After opening the third pair of opening doors 13, the buffer pipe manifold 3 can be repaired.

[0039] According to the present utility model, after opening the second pair of opening doors 12, the buffer tank 2 and the buffer pipe manifold 3 can be repaired simultaneously, which is convenient for maintenance.

[0040] In a specific embodiment, a ball valve and an electric valve are provided on the exhaust pipe 23. During the actual working process, the opening and closing of the exhaust pipe 23 can be controlled through the ball valve and the electric valve according to the actual situation.

[0041] As Figure 2As shown, the left - end inlet of the buffer manifold 3 is connected to the exhaust pipe 23. Multiple injection pipes 31 are provided at the lower - end outlet of the buffer manifold 3, and each injection pipe 31 extends to the outside of the box body 1. Specifically, the injection pipes 31 are evenly distributed on the buffer manifold 3, pass through the bottom plate of the box body 1 downward, and thus extend to the outside of the box body 1. After each injection pipe 31 extends to the outside of the box body 1, each production gas well is connected by a quick - coupling connection method.

[0042] In a preferred embodiment, the number of injection pipes 31 is eight, and the injection pipes 31 are parallel to each other.

[0043] In a preferred embodiment, the injection pipes 31 are connected to the production gas wells through quick - connectors.

[0044] The gas in the buffer tank 2 enters the buffer manifold 3 through the exhaust pipe 23. The buffer manifold 3 then distributes the gas to each injection pipe 31, and the gas is injected into each production gas well through each injection pipe 31.

[0045] The buffer tank 2 and the buffer manifold 3 of the present utility model are both arranged in the box body 1. During use, only the inlet pipe 21 extending out of the box body 1 needs to be connected to the compressor 5, and each injection pipe 31 extending out of the box body 1 needs to be connected to each production gas well, then production can be started, so as to achieve the purposes of stable and increased production of gas wells, reduced handling costs, and shortened installation and disassembly time.

[0046] In a preferred embodiment, a first pressure - relief pipe 24 is connected to the upper part of the buffer tank 2, and a first safety valve 25 is arranged on the first pressure - relief pipe 24. When the pressure in the buffer tank 2 exceeds the set pressure of the first safety valve 25, the first safety valve 25 automatically opens, and the gas in the buffer tank 2 can flow out through the first pressure - relief pipe 24, thereby reducing the pressure in the buffer tank 2.

[0047] As Figure 2 and Figure 3 shown, a vent pipe 32 is connected to the buffer manifold 3, and the first pressure - relief pipe 24 is connected to the vent pipe 32. The vent pipe 32 can be arranged on the left part of the buffer manifold 3, as Figure 2 shown. The vent pipe 32 can also be arranged on the right part of the buffer manifold 3, as Figure 3 shown. That is to say, the specific installation position of the vent pipe 32 does not need to be specifically limited, as long as the vent pipe 32 is connected to the buffer manifold 3.

[0048] The vent pipe 32 is connected to an existing vent standpipe (not shown in the figure). A ball valve, two electric valves, and a ball valve are sequentially connected in series from top to bottom on the vent pipe 32. The connection position of the first pressure - relief pipe 24 and the vent pipe 32 is between the lowermost ball valve and the electric valve of the vent pipe 32.

[0049] AsFigure 2 As shown, in a preferred embodiment, a second pressure relief pipe 33 is connected to the buffer manifold 3, and a second safety valve 34 is provided on the second pressure relief pipe 33.

[0050] In a preferred embodiment, as Figure 3 shown, the second pressure relief pipe 33 includes two branches connected in parallel to each other. The second safety valve 34 is provided on one of the branches of the second pressure relief pipe 33, and a ball valve is provided in series with the second safety valve 34 on this branch. When the second safety valve 34 needs to be repaired or replaced, the ball valve on this branch can be closed. Two ball valves are connected in series on the other branch of the second pressure relief pipe 33. When these two ball valves are opened, the second safety valve 34 can be short-circuited.

[0051] In this setting, after the pressure in the buffer manifold 3 is greater than the set pressure of the second safety valve 34, the second safety valve 34 opens to relieve the pressure of the buffer manifold 3. When it is necessary to empty the buffer manifold 3, the two ball valves in parallel with the second safety valve 34 are opened, and the buffer manifold 3 can be emptied.

[0052] In a preferred embodiment, the second pressure relief pipe 33 is connected to the vent pipe 32. The connection position of the second pressure relief pipe 33 and the vent pipe 32 is between the ball valve and the electric valve at the lowermost part of the vent pipe 32.

[0053] In a specific embodiment, a check valve 211, a flow meter 212, and a first ball valve 213 are sequentially provided on the intake pipe 21 along the gas flow direction.

[0054] In a specific embodiment, a first pressure gauge 26 is provided on the buffer tank 2. A local pressure gauge 35 and a remote pressure gauge 36 are provided on the buffer manifold 3.

[0055] In a preferred embodiment, a control cabinet 4 is provided in the box body 1, as Figure 1 shown, the control cabinet 4 is fixedly provided on the rear side wall of the box body 1.

[0056] As Figure 4 shown, the control cabinet 4 includes a housing 41 and an explosion-proof cabinet 42 provided in the housing 41. A partition 43 is provided in the housing 41 along the horizontal direction. The partition 43 divides the housing 41 into upper and lower cavities. The explosion-proof cabinet 42 is located above the partition 43. A plurality of interfaces are provided at the bottom of the box body 1, and each interface is connected to the explosion-proof cabinet 42.

[0057] Specifically, a power connector 44, a first control connector 45, a second control connector 46, and a third control connector 47 are provided at the bottom of the box body 1. The power connector 44, the first control connector 45, the second control connector 46, and the third control connector 47 are respectively connected to the explosion-proof cabinet 42 through wires 48. One end of the wire 48 is connected to the explosion-proof cabinet 42, and the other end of the wire 48 passes through the partition 43 and the bottom plate of the outer shell 41 to be connected to each connector.

[0058] The power connector 44 is used to connect to an external power supply to supply power to the explosion-proof cabinet 42. Specifically, the external power supply can be mains power or a solar battery.

[0059] The first control connector 45 and the second control connector 46 are used for the communication connection between the PLC and each electric valve in this embodiment. The third control connector 47 is used for the communication connection between the PLC and each flow meter and pressure gauge in this embodiment. It is easy to understand that the inventive point of the present utility model lies in the structural arrangement. These electric control connection methods are all prior arts and are not the technical key points of the present utility model, so they will not be elaborated here.

[0060] In a preferred embodiment, the power supply line is packaged in a box and fixed inside the box body 1. Instrument lines such as each flow meter and pressure gauge use snake skin metal pipes for threading.

[0061] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0062] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0063] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0064] Finally, it should be noted that the above are only the preferred implementation schemes of the present utility model and do not constitute any limitation to the present utility model. Although the present utility model has been described in detail with reference to the foregoing implementation schemes, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A gas lift process booster device for oil and gas wells, characterized in that: include: Box body (1); A buffer tank (2), the buffer tank (2) being fixedly arranged in the housing (1), the buffer tank (2) being connected to an air intake pipe (21), a sewage pipe (22) and an exhaust pipe (23), the air intake pipe (21) and the sewage pipe (22) both extending to the outside of the housing (1), and the air intake pipe (21) being connected to the compressor by means of a snap connection; A buffer manifold (3), wherein the buffer manifold (3) is fixedly arranged in the casing (1), the inlet of the buffer manifold (3) is connected to the exhaust pipe (23), and a plurality of gas injection pipes (31) are arranged at the outlet of the buffer manifold (3), each of the gas injection pipes (31) extends to the outside of the casing (1), and each of the gas injection pipes (31) is connected to each production gas well by means of a snap connection.

2. The oil and gas well gas lift process booster device according to claim 1, characterized in that: A first double-leaf door (11), a second double-leaf door (12) and a third double-leaf door (13) are respectively arranged on the three side walls of the box body (1).

3. The oil and gas well gas lift process booster device according to claim 1, characterized in that: A first pressure relief pipe (24) is connected to the upper part of the buffer tank (2), and a first safety valve (25) is arranged on the first pressure relief pipe (24).

4. The oil and gas well gas lift process booster device according to claim 3, characterized in that: The buffer pipe manifold (3) is connected to a vent pipe (32), and the first pressure relief pipe (24) is connected to the vent pipe (32).

5. The oil and gas well gas lift process booster device according to claim 4, characterized in that: The buffer pipe manifold (3) is connected to a second pressure relief pipe (33), and a second safety valve (34) is provided on the second pressure relief pipe (33).

6. The oil and gas well gas lift process booster device according to claim 5, characterized in that: The second pressure relief pipe (33) is connected to the vent pipe (32).

7. The oil and gas well gas lift process booster device according to any one of claims 1 to 6, characterized in that: A check valve (211), a flow meter (212) and a first ball valve (213) are sequentially arranged on the air inlet pipe (21) along the gas flow direction.

8. The oil and gas well gas lift process booster device according to any one of claims 1 to 6, characterized in that: A first pressure gauge (26) is provided on the buffer tank (2).

9. The oil and gas well gas lift process pressurization device according to any one of claims 1 to 6, characterized in that: The buffer manifold (3) is provided with an on-site pressure gauge (35) and a remote pressure gauge (36).

10. The oil and gas well gas lift process pressurization device according to any one of claims 1 to 6, characterized in that: A control cabinet (4) is arranged in the box body (1), and the control cabinet (4) comprises an outer shell (41) and an explosion-proof cabinet (42) arranged in the outer shell (41). A partition (43) is arranged in the horizontal direction in the outer shell (41), and the explosion-proof cabinet (42) is located above the partition (43). A plurality of interfaces are arranged at the bottom of the box body (1), and each of the interfaces is connected to the explosion-proof cabinet (42).

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