CN217080413U - Double-hydraulic-cylinder ground driving device for coal-bed gas well - Google Patents
Double-hydraulic-cylinder ground driving device for coal-bed gas well Download PDFInfo
- Publication number
- CN217080413U CN217080413U CN202122873988.0U CN202122873988U CN217080413U CN 217080413 U CN217080413 U CN 217080413U CN 202122873988 U CN202122873988 U CN 202122873988U CN 217080413 U CN217080413 U CN 217080413U
- Authority
- CN
- China
- Prior art keywords
- filter
- cylinder
- check valve
- valve
- cap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a two pneumatic cylinder ground drive of coal bed gas well, including first well head filter, first pressure boost subassembly, second well head filter, second pressure boost subassembly, water tank system, hydraulic drive system, first well head filter includes first filter main part and first gas accuse check valve, second well head filter includes second filter main part, second gas accuse check valve and third gas accuse check valve. The double-hydraulic-cylinder ground driving device for the coal-bed gas well cancels a ground pipeline and a high-pressure water reversing valve, and has the advantages of simple flow, simple structure, few fault points and small operation vibration.
Description
Technical Field
The utility model belongs to the technical field of coal bed gas well drainage gas production, specifically, relate to a two pneumatic cylinder ground drive of coal bed gas well.
Background
The utility model discloses a publication number CN102758602A, patent name: the coal bed gas well concentric tube hydraulic piston arranges and adopts the improved generation of ground drive arrangement in the device and method. The ground driving device in the prior art has the problems of complex flow, large vibration and the like.
Disclosure of Invention
The present invention aims at solving at least one of the technical problems in the related art to a certain extent.
Therefore, the embodiment of the utility model provides a two pneumatic cylinder ground drive of coal bed gas well is provided, this two pneumatic cylinder ground drive of coal bed gas well has cancelled ground pipeline and high pressure water switching-over valve, and the flow is simple, simple structure, and the fault point is few, and the operation vibration is little.
According to the utility model discloses two pneumatic cylinder ground drive of coal bed gas well, including first well head filter, second well head filter, pressure boost subassembly, water tank system, hydraulic drive system.
The first wellhead filter comprises a first filter body and a first pneumatic check valve, the upper end of the first filter body is communicated with a central pipe of a downhole device, and the lower end of the first filter body is communicated with the first pneumatic check valve;
the second wellhead filter comprises a second filter main body, a second pneumatic control check valve and a third pneumatic control check valve, the upper end of the second filter main body is communicated with an oil pipe of the underground device, the lower end of the second filter main body is communicated with the second pneumatic control check valve, and the third pneumatic control check valve is arranged at the upper end of the second filter main body and is communicated with the oil pipe;
the two pressurizing assemblies are respectively communicated with the first wellhead filter and the second wellhead filter
The water tank system is communicated with the first pneumatic control check valve and the second pneumatic control check valve respectively;
the hydraulic driving system is used for providing power for the coal-bed gas well double-hydraulic-cylinder ground driving device.
In some embodiments, the first filter body comprises a first filter upper cap, a first filter pipe, a first filter lower cap and a first high-pressure ball valve, the first filter upper cap is connected with the top end of the first filter pipe, the first filter pipe is communicated with a central pipe of the downhole device through the first filter upper cap, one end of the first filter lower cap is connected with the first filter pipe, the other end of the first filter lower cap is connected with the first high-pressure ball valve, the first high-pressure ball valve is communicated with the first filter pipe, and the first high-pressure ball valve is connected with one of the pressurizing assemblies.
In some embodiments, the second filter body comprises a second filter upper cap, a second filter pipe, a second filter lower cap and a second high-pressure ball valve, the second filter upper cap is connected with the top end of the second filter pipe, the second filter pipe is communicated with a central pipe of the downhole device through the second filter upper cap, one end of the second filter lower cap is connected with the second filter pipe, the other end of the second filter lower cap is connected with the second high-pressure ball valve, the second high-pressure ball valve is communicated with the second filter pipe, and the second high-pressure ball valve is connected with another pressurizing assembly.
In some embodiments, the first pneumatic check valve comprises a first check valve housing, a first valve ball, a first valve seat, a first water outlet tee joint, a first pneumatic push rod and a first cylinder, the first check valve housing is communicated with the first filtering lower cap through a pipeline, the first valve ball is arranged in the first check valve housing and is in sliding fit with the first check valve housing, the first valve seat is arranged at one end of the first check valve housing and is connected with the first valve seat, the first water outlet tee joint is arranged at the other end of the first valve seat and is connected with the first valve seat, the first cylinder is connected with the first water outlet tee joint, the first pneumatic push rod is arranged in the first water outlet tee joint, one end of the first pneumatic push rod is connected with the first cylinder, the other end of the first pneumatic push rod passes through the first water outlet tee joint and the first valve seat and abuts against the first valve ball, the first water outlet tee joint is communicated with the water tank system through a pipeline.
In some embodiments, the second pneumatically controlled check valve comprises a second check valve housing, a second valve ball, a second valve seat, a second water outlet tee, a second pneumatic push rod, and a second cylinder, the second pneumatically controlled check valve is structurally identical to the first pneumatically controlled check valve, and the second pneumatically controlled check valve is in communication with the second filter lower cap.
In some embodiments, the third pneumatically controlled check valve comprises a third check valve housing, a third valve ball, a third valve seat, a third outlet tee, a third pneumatic ram, and a third cylinder, the third pneumatically controlled check valve is identical in structure to the first pneumatically controlled check valve, and the third check valve housing is in communication with the second filter upper cap.
In some embodiments, the pressure boosting assembly includes a cylinder end cover, a water end cylinder cap, a cylinder, a sealing element, a piston, an oil end cylinder cap, a magnetic ring, a reed pipe housing, and a reed pipe, the water end cylinder cap is disposed on one end of the cylinder, the oil end cylinder cap is disposed on the other end of the cylinder, the piston is disposed in the cylinder, the piston is in sliding fit with the cylinder, the sealing element is disposed between the piston and the cylinder, the magnetic ring is disposed on the piston, the two cylinder end covers are disposed on the outer side of the water end cylinder cap and the outer side of the oil end cylinder cap, the reed pipe housing is disposed on the cylinder end cover, the reed pipe housing is disposed in the reed pipe housing, and the water end cylinder cap is communicated with the first high pressure ball valve or the second high pressure ball valve.
In some embodiments, the water tank system includes a water tank, a first centrifugal pump, a second centrifugal pump and a liquid level switch, the first centrifugal pump is established in the water tank and communicates the water tank with the first pneumatic control check valve, the second centrifugal pump is established in the water tank and communicates the water tank with the second pneumatic control check valve, and the liquid level switch is established in the water tank for controlling the liquid level of the water tank.
Has the advantages that:
the utility model discloses a two pneumatic cylinder ground drive of coal bed gas well has cancelled ground pipeline and high-pressure switching-over valve, and the flow is simple, simple structure, fault point are few. High-pressure water is alternately injected into the central pipe and the oil pipe to drive the underground pump set to reciprocate, and the hydraulic pressure in the well is pumped to the ground.
The piston moves to the right when the pressure of the pressurizing assembly is released, so that the effect can be generated, and the vibration generated when the device releases the pressure can be reduced.
The two ends of the pressurizing assembly are provided with the cylinder end covers, so that other pipeline parts are not detached when the piston sealing element is replaced, and the pressurizing assembly is convenient and fast.
Drawings
Fig. 1 is a schematic view of a double-hydraulic-cylinder ground driving device for a coal-bed gas well according to an embodiment of the present invention;
FIG. 2 is a schematic view of a first wellhead filter according to an embodiment of the present invention;
FIG. 3 is a schematic view of a second wellhead filter according to an embodiment of the present invention;
fig. 4 is a schematic view of a pressurizing assembly according to an embodiment of the present invention.
Reference numerals:
a first wellhead filter 1; a first filter body 11; a first filter upper cap 111; a first filtering pipe 112; a first filtering lower cap 113; a first high pressure ball valve 114; a first pneumatically controlled check valve 12; a first single flow valve housing 121; first valve ball 122 first valve seat 123; a first water outlet tee 124; a first pneumatic ram 125; a first cylinder 126;
a second wellhead filter 2; a second filter body 21; a second filter upper cap 211; a second filtering pipe 212; a second filtering lower cap 213; a second high pressure ball valve 214; a second pneumatically controlled check valve 22; a second single flow valve housing 221; a second valve ball 222; a second valve seat 223; a second outlet tee 224; a second pneumatic ram 225; a second cylinder 226; a third pneumatically controlled check valve 23; a third single flow valve housing 231; a third valve ball 232; a third valve seat 233; a third outlet tee 234; a third pneumatic ram 235; a third cylinder 236;
a pressurizing assembly 3; a cylinder end cap 31; a water end cylinder cap 32; a cylinder barrel 33; a seal 34; a piston 35; an oil end cylinder cap 36; a magnetic ring 37; a reed switch housing 38; a reed pipe 39;
a water tank system 4; a water tank 41; a first centrifugal pump 42; a second centrifugal pump 43, a liquid level switch 44;
a hydraulic drive system 5.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1-3, the coal bed gas well double hydraulic cylinder ground driving device of the embodiment of the present invention includes a first wellhead filter 1, a second wellhead filter 2, a pressurizing assembly 3, a water tank system 4 and a hydraulic driving system 5.
Specifically, as shown in fig. 2, the first wellhead filter 1 comprises a first filter body 11 and a first pneumatic check valve 12, the first filter body 11 comprises a first filter upper cap 111, a first filter pipe 112, a first filter lower cap 113 and a first high-pressure ball valve 114, the upper end of the first filter pipe 112 is fixedly connected with the first filter upper cap 111, and the central pipe is communicated with the first filter pipe 112 through a pipeline. The lower end of the first filtering pipe 112 is connected with a first filtering lower cap 113, a first high-pressure ball valve 114 is arranged on the first filtering lower cap 113, and the first high-pressure ball valve 114 is communicated with the filtering pipe.
The first pneumatic check valve 12 comprises a first check valve housing 121, a first valve ball 122, a first valve seat 123, a first water outlet tee 124, a first pneumatic push rod 125 and a first air cylinder 126, wherein the upper end of the first valve seat 123 is hermetically connected with the lower end of the first check valve housing 121, and a through hole is formed in the side wall of the first check valve housing 121 and is used for being communicated with the first filtering lower cap 113 through a pipeline. The first valve ball 122 is disposed in the first single flow valve housing 121 and slidably engages the first single flow valve housing 121. The first water outlet tee 124 is connected with the lower end of the first valve seat 123. The lower end of the first water outlet tee 124 is connected with a first air cylinder 126. The first pneumatic push rod 125 is disposed in the first water outlet tee 124, the lower end of the first pneumatic push rod 125 is connected to the first cylinder 126, and the upper end thereof passes through the first water outlet tee 124 and the first valve seat 123 to stop against the first valve ball 122. The first pneumatic push rod 125 is slidably engaged with the first water outlet tee 124. The first cylinder 126 is used to drive the first pneumatic ram 125 to move in the up-down direction. The first water outlet tee 124 has a passage on the side wall for communicating with the water tank 41 through a pipeline. The first pneumatically controlled check valve 12 is used to control the opening and closing of the line between the water tank 41 and the first wellhead filter 1.
As shown in fig. 3, the second wellhead filter 2 includes a second filter body 21, a second high pressure ball valve 22 and a third pneumatically controlled check valve 23. The second filter body 21 has the same inner structure as the first filter body 11, and the second filter body 21 includes a second filter upper cap 211 communicating with an oil pipe, a second filter pipe 212, a second filter lower cap 213, and a second high pressure ball valve 214.
The second high-pressure ball valve 22 comprises a second single flow valve housing 221, a second valve ball 222, a second valve seat 223, a second water outlet tee 224, a second pneumatic push rod 225 and a second cylinder 226, the second high-pressure ball valve 22 has the same structure as the first pneumatic check valve 12, and the second single flow valve housing 221 is communicated with the second filtering lower cap 213. The second high pressure ball valve 22 is used to control the opening and closing of the line between the water tank system 4 and the second wellhead filter 2.
The third pneumatic check valve 23 comprises a third check valve housing 231, a third valve ball 232, a third valve seat 233, a third water outlet tee 234, a third pneumatic push rod 235 and a third cylinder 236, and the third pneumatic check valve 23 has the same structure as the first pneumatic check valve 12. The third single flow valve housing 231 communicates with the second filter upper cap. When the third pneumatic control check valve 23 is opened, the liquid discharged from the oil pipe can be directly discharged through the third pneumatic control check valve 23, and when the third pneumatic control check valve is closed, the liquid discharged from the oil pipe is filtered by the second filter pipe 212 and then discharged into the water tank system 4.
As shown in fig. 4, there are 2 pressure boost assemblies 3, and each pressure boost assembly 3 includes a cylinder end cover 31, a water end cylinder cap 32, a cylinder 33, a sealing member 34, a piston 35, an oil end cylinder cap 36, a magnetic ring 37, a reed pipe housing 38, and a reed pipe 39. The left end of the cylinder barrel 33 is communicated and fixedly connected with the water end cylinder barrel cap 32, and the right end of the cylinder barrel 33 is communicated and fixedly connected with the oil end cylinder barrel cap 36. Three pistons 35 are arranged in the cylinder 33 in sequence and are matched with the cylinder 33 in a sliding way. A sealing element 34 is arranged between the piston 35 and the cylinder 33, and a magnetic ring 37 is arranged at the end part of the piston 35. The left side of water end cylinder cap 32 and the right side of oil end cylinder cap 36 are equipped with cylinder end cover 31, and cylinder end cover 31 is respectively with water end cylinder cap 32 and oil end cylinder cap 36 fixed connection. The reed pipe shell 38 is arranged on the cylinder end cover 31, the reed pipe shell 38 can be made of copper, the reed pipe shell 38 penetrates through the cylinder end cover 31 and the water end cylinder cap 32 or the oil end cylinder cap 36 and extends into the cylinder 33, and the outer diameter of the reed pipe shell 38 corresponds to the inner diameter of the magnetic ring 37. The cylinder cap 32 of one of the pressurizing assemblies 3 is communicated with the first high-pressure ball valve 114, and the cylinder cap 32 of the other pressurizing assembly 3 is communicated with the second high-pressure ball valve 214. The low-pressure water in the first wellhead filter 1 or the second wellhead filter 2 can enter the cylinder barrel 33 through the water end cylinder barrel cap 32, the piston 35 is pushed to move right, when the piston 35 reaches the right end of the cylinder barrel 33, the magnetic ring 37 induces the reed pipe 39 at the right end to generate a signal, at the moment, the high-pressure hydraulic oil enters from the oil end cylinder barrel cap 36, and the low-pressure water in the cylinder barrel 33 is pressurized into high-pressure water.
As shown in fig. 1, the water tank 41 assembly includes a water tank 41, a first centrifugal pump 42, a second centrifugal pump 43 and a liquid level switch 44, the first centrifugal pump 42 and the second centrifugal pump 43 are both disposed in the water tank 41, the first centrifugal pump 42 is communicated with the first water outlet tee 124, and the second centrifugal pump 43 is communicated with the second water outlet tee 224. A level switch 44 is provided in the tank 41 for controlling the level of the water in the tank 41.
The hydraulic driving system 5 is used for providing power for the coal-bed gas well double-hydraulic-cylinder ground driving device.
According to the utility model discloses two pneumatic cylinder ground drive of coal bed gas well has oil pipe in the pit shaft, has the center tube in the oil pipe, forms two passageways (the annular channel and the center tube hole passageway of oil pipe and center tube), and two interfaces of pump package in the pit are connected respectively to oil pipe and center tube, and the main function of this device is from two passageways of center tube and oil pipe pour into the water under high pressure in the well in turn, and drive pump package reciprocating motion in the pit extracts ground with hydraulic pressure in the well.
Starting up the process: the water tank 41 is filled with water, the first centrifugal pump 42 and the second centrifugal pump 43 are started, the third pneumatic control check valve 23 is closed, low-pressure water enters the two pressurizing assemblies 3 through the first pneumatic control check valve 12 or the second high-pressure ball valve 22 and the first filter or the second filter main body 21, the piston 35 is pushed to the right end of the cylinder barrel 33, the reed pipe 39 sends out a signal, and the centrifugal pumps stop working.
The operation flow is as follows: the pressurizing assembly 3 communicated with the first wellhead filter 1 injects high-pressure hydraulic oil into the cylinder barrel 33 through the hydraulic driving system 5, low-pressure water is pressurized and then injected into the central tube through the filter, the underground pump set is driven to operate, and liquid is produced in an oil tube at the moment. When the liquid level of the water tank 41 is at the lower limit, the third pneumatic control check valve 23 is closed, the second high-pressure ball valve 22 is opened, and the produced liquid enters the water tank 41 after being filtered by the second filter pipe 212 until the liquid level of the water tank 41 reaches the upper limit. When the liquid level of the water tank 41 is above the lower limit, the third pneumatic control check valve 23 is opened, the second high-pressure ball valve 22 is closed, and the produced liquid carrying impurities is directly discharged through the third pneumatic control check valve 23.
A well washing process: when the well is washed, the pressurizing assembly 3 injects high-pressure water into the first wellhead filter 1 (the second air-controlled one-way valve is opened, the produced liquid flows into the water tank 41), the high-pressure water is injected into the central pipe through the first wellhead filter 1, after the well is washed by the driving underground device, the first centrifugal pump 42 works, low-pressure water is injected into the pressurizing assembly 3, when the piston 35 moves to the reed pipe 39 at the right end to generate a signal, the liquid supplement is stopped, and the pressurizing assembly 3 starts pressurizing. The time is set through a PLC program in the process of fluid infusion and pressurization.
The flow of backwashing a produced liquid filter pipe: under the control of the PLC program, the third pneumatic control check valve 23 is opened, the second centrifugal pump 43 works, and low-pressure water is injected into the second filter pipe 212 through the second high-pressure ball valve 22 and is discharged through the third pneumatic control check valve 23.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention may be modified or substituted with equivalents without departing from the spirit and scope of the invention, which should be construed as being limited only by the claims.
In the description of the present invention, it should be understood that the terms "left", "right", "front", "back", "up", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the scope of the present invention.
Claims (8)
1. The utility model provides a two pneumatic cylinder ground drive of coal bed gas well which characterized in that includes:
a first wellhead filter comprising a first filter body and a first pneumatically controlled check valve, the first filter body communicating at an upper end with a central tube of a downhole device and at a lower end with the first pneumatically controlled check valve;
the second wellhead filter comprises a second filter main body, a second pneumatic control check valve and a third pneumatic control check valve, the upper end of the second filter main body is communicated with an oil pipe of the underground device, the lower end of the second filter main body is communicated with the second pneumatic control check valve, and the third pneumatic control check valve is arranged at the upper end of the second filter main body;
two pressurizing assemblies are arranged and are respectively communicated with the first wellhead filter and the second wellhead filter;
the water tank system is communicated with the first pneumatic control check valve and the second pneumatic control check valve respectively;
and the hydraulic driving system is used for providing power for the double-hydraulic-cylinder ground driving device of the coal bed gas well.
2. The double-hydraulic-cylinder ground driving device for the coal-bed gas well as the coal-bed gas well is characterized in that the first filter body comprises a first filter upper cap, a first filter pipe, a first filter lower cap and a first high-pressure ball valve, the first filter upper cap is connected with the top end of the first filter pipe, the first filter pipe is communicated with a central pipe of the downhole device through the first filter upper cap, one end of the first filter lower cap is connected with the first filter pipe, the other end of the first filter lower cap is connected with the first high-pressure ball valve, the first high-pressure ball valve is communicated with the first filter pipe, and the first high-pressure ball valve is connected with one of the pressurizing assemblies.
3. The double-hydraulic-cylinder ground driving device for the coal-bed gas well as the coal-bed gas well is characterized in that the second filter main body comprises a second filter upper cap, a second filter pipe, a second filter lower cap and a second high-pressure ball valve, the second filter upper cap is connected with the top end of the second filter pipe, the second filter pipe is communicated with a central pipe of the downhole device through the second filter upper cap, one end of the second filter lower cap is connected with the second filter pipe, the other end of the second filter lower cap is connected with the second high-pressure ball valve, the second high-pressure ball valve is communicated with the second filter pipe, and the second high-pressure ball valve is connected with the other pressurizing assembly.
4. The coal-bed gas well double-hydraulic cylinder ground driving device as claimed in claim 3, wherein the first pneumatic check valve comprises a first check valve housing, a first valve ball, a first valve seat, a first water outlet tee joint, a first pneumatic push rod and a first cylinder, the first check valve housing is communicated with the first filtering lower cap through a pipeline, the first valve ball is arranged in the first check valve housing and is in sliding fit with the first check valve housing, the first valve seat is arranged at one end of the first check valve housing and is connected with the first valve seat, the first water outlet tee joint is arranged at the other end of the first valve seat and is connected with the first valve seat, the first cylinder is connected with the first water outlet tee joint, the first pneumatic push rod is arranged in the first water outlet tee joint, and one end of the first pneumatic push rod is connected with the first cylinder, the other end of the first valve ball is abutted against the first valve seat after penetrating through the first water outlet tee joint, and the first water outlet tee joint is communicated with the water tank system through a pipeline.
5. The double-hydraulic-cylinder ground driving device for the coal-bed gas well as the double-hydraulic-cylinder ground driving device for the coal-bed gas well is characterized in that the second pneumatic control check valve comprises a second check valve shell, a second valve ball, a second valve seat, a second water outlet tee joint, a second pneumatic push rod and a second air cylinder, the second pneumatic control check valve is identical in structure with the first pneumatic control check valve, and the second pneumatic control check valve is communicated with the second filtering lower cap.
6. The double-hydraulic-cylinder ground driving device for the coal-bed gas well as the coal-bed gas well is characterized in that the third pneumatic control check valve comprises a third check valve housing, a third valve ball, a third valve seat, a third water outlet tee joint, a third pneumatic push rod and a third air cylinder, the third pneumatic control check valve is identical in structure with the first pneumatic control check valve, and the third check valve housing is communicated with the second filter upper cap.
7. The double-hydraulic-cylinder ground driving device for the coal-bed gas well as defined by claim 3, wherein the boosting assembly comprises a cylinder end cover, a water-end cylinder cap, a cylinder, a sealing element, a piston, an oil-end cylinder cap, a magnetic ring, a reed pipe shell and reed pipes, the water-end cylinder cap is arranged at one end of the cylinder, the oil-end cylinder cap is arranged at the other end of the cylinder, the piston is arranged in the cylinder, the piston is in sliding fit with the cylinder, the sealing element is arranged between the piston and the cylinder, the magnetic ring is arranged on the piston, the two cylinder end covers are respectively arranged at the outer side of the water-end cylinder cap and the outer side of the oil-end cylinder cap, the reed pipe shell is arranged on the cylinder end cover, the reed pipe shell is internally provided with the reed pipe, and the water-end cylinder cap is communicated with the first high-pressure ball valve or the second high-pressure ball valve.
8. The coalbed methane well double-hydraulic cylinder ground driving device as recited in claim 1, wherein the water tank system comprises a water tank, a first centrifugal pump, a second centrifugal pump and a liquid level switch, the first centrifugal pump is arranged in the water tank and is communicated with the water tank and the first pneumatic control check valve, the second centrifugal pump is arranged in the water tank and is communicated with the water tank and the second pneumatic control check valve, and the liquid level switch is arranged in the water tank and is used for controlling the liquid level of the water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122873988.0U CN217080413U (en) | 2021-11-23 | 2021-11-23 | Double-hydraulic-cylinder ground driving device for coal-bed gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122873988.0U CN217080413U (en) | 2021-11-23 | 2021-11-23 | Double-hydraulic-cylinder ground driving device for coal-bed gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217080413U true CN217080413U (en) | 2022-07-29 |
Family
ID=82538387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122873988.0U Active CN217080413U (en) | 2021-11-23 | 2021-11-23 | Double-hydraulic-cylinder ground driving device for coal-bed gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217080413U (en) |
-
2021
- 2021-11-23 CN CN202122873988.0U patent/CN217080413U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102758602B (en) | Concentric tube hydraulic piston drainage and extraction device and method for coal-bed gas well | |
| CN201180635Y (en) | Hydraulic double-acting rodless pump | |
| CN217080413U (en) | Double-hydraulic-cylinder ground driving device for coal-bed gas well | |
| US5651666A (en) | Deep-well fluid-extraction pump | |
| CN206988079U (en) | A kind of fluid pressure type oil well pump | |
| CN111088966B (en) | Hydraulic drive rodless drainage gas production device and two-position four-way reversing valve | |
| CN108150121A (en) | Jet flow pressurizing formula electric hydaulic bridge plug setting tool | |
| CN217632894U (en) | Mining emulsion plunger pump | |
| CN204532276U (en) | Fluid pressure linkage double acting Rodless oil extraction device | |
| CN211692416U (en) | Liquid-driving rodless water-draining gas-producing device and two-position four-way reversing valve | |
| CN101782060B (en) | Hydraulic oil pump | |
| CN204436767U (en) | Hydraulic double-acting rodless pumping operation pump and system | |
| CN107939361B (en) | Foam liquid discharge oil production string and method for oil pumping well | |
| CN107100592B (en) | Coal bed gas multi-machine interaction hydraulic-driven mining process system | |
| CN220015471U (en) | Single-action pump for discharging liquid outwards | |
| CN203097852U (en) | Flow parting device under producing well | |
| CN112065697A (en) | Double-channel slide valve whole-course oil well pump and special slide valve | |
| CN205260297U (en) | Hydraulic pressure booster pump | |
| CN116428164A (en) | Double-acting pump and double-acting pump with driving power source | |
| CN220118294U (en) | Dual-channel feedback oil pump | |
| CN219061959U (en) | Double-plunger test combined pump | |
| CN218564062U (en) | Hydraulic cylinder vertical U-shaped clamp structure | |
| CN220134178U (en) | Underground large-displacement external liquid discharge single-action pump of rodless drainage system | |
| CN219888233U (en) | Underground fixed cylinder single-acting pump of rodless drainage and production system | |
| CN216241145U (en) | High-pressure reciprocating plunger type booster pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |