CN218150825U - Structure is taken out to coal seam gas well tubular pump well-flushing machine - Google Patents
Structure is taken out to coal seam gas well tubular pump well-flushing machine Download PDFInfo
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- CN218150825U CN218150825U CN202221914078.0U CN202221914078U CN218150825U CN 218150825 U CN218150825 U CN 218150825U CN 202221914078 U CN202221914078 U CN 202221914078U CN 218150825 U CN218150825 U CN 218150825U
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Abstract
The utility model discloses a coal bed gas well tubular pump well washing machine pumping structure, in particular to the technical field of coal bed gas well washing equipment, which comprises a sleeve, wherein a tail pipe, a gas anchor, a pump well washing tool, a tubular pump and an oil pipe are sequentially arranged in the sleeve from bottom to top, and the tail pipe and the gas anchor, the tubular pump and the oil pipe are connected through an oil pipe coupling; an aluminum-plastic pipe is arranged between the oil pipe and the sleeve, and the bottom end of the aluminum-plastic pipe is connected with the well washing tool under the pump. The utility model discloses a tubular pump sunction inlet well-flushing, three kinds of well-flushing modes of hollow sucker rod well-flushing and automatic cycle well-flushing flow combine, it is good at the standing valve to have accomplished the machine and drawn the process to the standing valve, traveling valve is good at, the gas anchor, the tubular pump sunction inlet washs, also can increase the liquid flow speed in the oil pipe simultaneously, take sand and buggy in the oil pipe to ground, the difficult problem of pump card, pump block, pump leakage has been solved, effectual extension pump non-repair period, practice thrift the working costs, guarantee the continuity of gas well production.
Description
Technical Field
The utility model relates to a coal bed gas well flushing equipment technical field, more specifically say, the utility model relates to a structure is taken out to coal bed gas well tubular pump well flushing machine.
Background
Coal dust is generated by coal bed instability damage caused by well drilling, fracturing engineering and drainage and production disturbance, and can be divided into residual coal dust of well drilling according to coal dust sources, coal dust is generated due to borehole instability, coal matrix is broken to generate coal dust, the liquid yield of a gas well is reduced due to the coal dust, and the coal dust falls on a fixed valve seat of a drainage and production tubular pump, so that the fixed valve is not closed tightly, and pump leakage is caused; part of the well coal dust buries the fixed valve channel to cause the blockage of the liquid inlet channel; the coal dust adheres to the pump plunger, causing pump sticking.
The hydraulic fracturing modification technology is an effective yield increasing method for exploiting coal bed gas, water flow is driven by high pressure along with proppants such as quartz sand, ceramsite and the like to squeeze into original and newly-created cracks in a reservoir, the cracks are widened and extended, further more secondary cracks are generated in the reservoir, a channel with higher flow conductivity can be generated to effectively communicate a shaft and the reservoir, the single well control area and the yield of a coal bed gas well are improved, after fracturing is completed, the gas well discharges water in the cracks in the water drainage and gas production process, particularly the bottom hole flow pressure is quickly reduced, the proppants such as quartz sand with particle sizes and ceramsite and the like in water enter a well barrel and a pump, and after the sand enters the pump barrel, the sand falls on a fixed valve seat of a drainage and production tubular pump, so that the fixed valve is not leaked; part of well sand and pulverized coal can block the fixed valve channel after being mixed, so that the liquid inlet channel is blocked.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-mentioned defect of prior art, the embodiment of the utility model provides a structure is taken out to coal seam gas well tubular pump well-flushing machine to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a pumping structure of a coal bed gas well tubular pump well washing machine comprises a casing, wherein a tail pipe, a gas anchor, a well washing tool under the pump, a tubular pump and an oil pipe are sequentially arranged in the casing from bottom to top, and the tail pipe is connected with the gas anchor and the tubular pump is connected with the oil pipe through oil pipe couplings;
an aluminum-plastic pipe is arranged between the oil pipe and the sleeve, and the bottom end of the aluminum-plastic pipe is connected with the well washing tool under the pump;
a piston, a hollow sucker rod injector, a hollow sucker rod coupling and a hollow sucker rod are sequentially arranged in the oil pipe from bottom to top;
a fixed valve and two traveling valves are arranged in the piston, and a piston liquid drainage channel is arranged at the top end of the piston;
a well washing connector guide channel is arranged in the pump down well washing tool;
the gas anchor is internally provided with a gas anchor central tube, and the side wall of the gas anchor is provided with a gas anchor suction inlet;
the top end of the hollow sucker rod is provided with a water replenishing port, and the top end of the oil pipe is provided with a liquid discharging port.
Further, the angle of the well washing joint guide channel is set to be 45 degrees.
Furthermore, the piston, the hollow sucker rod injector, the hollow sucker rod coupling and the hollow sucker rod are connected in pairs through screw threads.
Furthermore, the top end of the oil pipe is hung on a wellhead device of the coal-bed gas well.
Furthermore, the top end of the hollow sucker rod is connected with a pumping device.
The utility model has the advantages that:
the device realizes the combination of three well washing modes of a tubular pump suction inlet well washing, a hollow sucker rod well washing and an automatic circulation well washing process, realizes the cleaning of a fixed valve, a traveling valve, a gas anchor and a tubular pump suction inlet in the pumping process, can increase the liquid flow speed in the oil pipe, carries sand and coal powder in the oil pipe to the ground, solves the problems of pump blockage, pump blockage and pump leakage, effectively prolongs the pump repair-free period, saves the operation cost and ensures the continuity of gas well production.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
The pumping structure of the coal bed gas well tubular pump well washing machine shown in the attached figure 1 comprises a casing 20, wherein a tail pipe 12, an air anchor 9, a pump down well washing tool 8, a tubular pump 7 and an oil pipe 18 are sequentially arranged in the casing 20 from bottom to top, and the tail pipe 12 and the air anchor 9 and the tubular pump 7 and the oil pipe 18 are connected through oil pipe couplings 4;
an aluminum-plastic pipe 19 is arranged between the oil pipe 18 and the sleeve 20, and the bottom end of the aluminum-plastic pipe 19 is connected with the pump-down well-flushing tool 8;
a piston 5, a hollow sucker rod injector 3, a hollow sucker rod coupling 2 and a hollow sucker rod 1 are sequentially arranged in the oil pipe 18 from bottom to top;
a fixed valve 16 and two traveling valves 6 are arranged in the piston 5, and a piston liquid drainage channel 17 is arranged at the top end of the piston 5;
a well washing connector guide channel 15 is arranged in the pump down well washing tool 8;
an air anchor central tube 14 is arranged in the air anchor 9, and an air anchor suction inlet 10 is formed in the side wall of the air anchor 9;
the top end of the hollow sucker rod 1 is provided with a water replenishing port 14, and the top end of the oil pipe 18 is provided with a liquid discharging port 11.
In the preferred embodiment, the angle of the flushing sub guide channel 15 is set at 45 °.
In the preferred embodiment, the piston 5, the hollow sucker rod injector 3, the hollow sucker rod coupling 2 and the hollow sucker rod 1 are connected with each other through screw threads.
In the preferred embodiment, the top end of tubing 18 is suspended from the wellhead assembly of the coal bed gas well.
In the preferred embodiment, the top end of the hollow sucker rod 1 is connected with a pumping device.
The utility model discloses the theory of operation:
the production of the coal bed gas well is that a tubular pump 7 is driven to work by pumping equipment, so that confined water in a coal reservoir is pumped out, the pressure of the coal reservoir is reduced, the methane adsorbed in the coal reservoir is promoted to be analyzed, and the adsorbed methane is analyzed into a large amount of free methane (gas state) by drainage and depressurization and is transferred to a well head to enter a centralized conveying process;
according to the figure 1, the coal bed is drained and depressurized, so that methane adsorbed in the coal bed is resolved into a large amount of free methane (gas state), the free methane (gas state) is mixed with formation water and then enters a gas anchor suction inlet 10, the gas water is separated into gas and water in a gas anchor 9 due to gravity, the water separated by the gas anchor 9 moves downwards and enters a downhole well washing tool 8 and a tubular pump 9 through a gas anchor central tube 13, the liquid improves kinetic energy through the operation of the tubular pump 9, and the liquid is discharged to a pool from a well mouth through an annular space between an oil tube 18 and a hollow sucker rod 1; the coal bed gas separated from the gas anchor 9 moves upwards, and is transported to a wellhead to enter a centralized conveying flow through an annular space between the casing 1 and the oil pipe 18.
Working principle of tubular pump
(1) Upstroke
When the plunger is pulled upwards by the sucker rod string and the traveling valve on the plunger is closed by the pressure of the liquid column in the oil pipe, the volume of the lower pump cavity below the plunger is increased, the pressure in the pump is reduced, the fixed valve is opened under the action of the pressure difference between the upper pressure and the lower pressure of the fixed valve, and the liquid is sucked into the pump. At the same time, the interior of tubing 18 has been gradually filled with fluid and the fluid above the plunger is discharged along tubing 18 to the surface, so the upstroke is the process of drawing fluid into the pump and discharging fluid at the wellhead.
(2) Downstroke
The sucker rod string drives the plunger to move downwards. The plunger compresses the liquid between the fixed valve and the traveling valve, and when the pressure in the pump increases to a pressure greater than the pressure of the liquid above the plunger, the traveling valve is lifted open, and the liquid below the plunger passes through the traveling valve and into the upper portion of the plunger, causing the pump to discharge the liquid. Therefore, the down stroke is the process of discharging liquid into the oil pipe by the pump, the condition of discharging the liquid by the pump is that the pressure in the pump is higher than the pressure of the liquid column above the plunger piston, and therefore, the down stroke is the process of discharging the liquid from the well head after the oil pipe enters the liquid
The utility model discloses contain tubular pump sunction inlet well-flushing flow, hollow sucker rod well-flushing flow and automatic cycle well-flushing flow.
The well washing process of the suction inlet of the tubular pump comprises the following steps: water enters from a well mouth and flows through the aluminum plastic pipe 19, the cavity between the pump-down well-washing tool 8 and the gas anchor 9, and the pump and the gas anchor 9 of the water washing machine achieve the function of preventing coal dust;
water is injected on the ground, when the piston 5 moves upwards, the upper traveling valve and the lower traveling valve 6 in the piston 5 are closed, the fixed valve 16 is opened, the ground injected water passes through the aluminum plastic pipe 19 and the pump down well flushing joint and is aligned to the fixed valve 16 through the well flushing joint guide channel 15, water with certain pressure directly flushes the fixed valve 16, and surrounding coal dust, sand and formation water are carried by the water and are converged into cavities of the traveling valves 6 and the fixed valve 16; when the piston 5 moves downwards, the traveling valve 6 is opened, the fixed valve 16 is closed, the mixed liquid in the cavities 16 of the traveling valve 6 and the fixed valve is compressed and then is pressurized, the compressed mixed liquid enters the annular space of the oil pipe 18 and the hollow sucker rod 1 through the piston liquid drainage channel 17, the mixed liquid with certain pressure and liquid flow speed is drained out of the ground and a well mouth from the annular space, and therefore the coal dust and sand which are cleaned by the tubular pump 7 and the valve are brought to the ground.
The well washing process of the hollow sucker rod comprises the following steps: water is discharged from a well head through the hollow sucker rod 1, the hollow sucker rod injector 3 and the annular space of the oil pipe 18 and the hollow sucker rod 1 together with water discharged by a piston in an injection pump barrel on the ground;
when the tubular pump 7 works in normal up-down stroke, water passes through the hollow sucker rod 1 and the hollow sucker rod injector 3 on the ground, and is aligned to the upper end face of the piston 5 through the guide channel of the hollow sucker rod injector 3, water with certain pressure directly washes the upper surface of the piston 5, pulverized coal and sand which are carried by the water above the piston 5 are mixed with mixed liquid which enters the oil pipe 18 and the annular space of the hollow sucker rod 1 through the piston liquid drainage channel 17, and the mixed liquid with certain pressure and liquid flow velocity is discharged out of the ground and a well mouth from the annular space, so that pulverized coal and abrasive belts above the piston 5 are discharged to the ground.
The automatic circulation well washing process is that water is boosted to 0.2 MPa through a mechanical diaphragm pump and is higher than well head casing pressure (gas flow process external conveying pressure), clear water is uniformly injected for 24 hours, daily produced liquid of gas well discharge capacity is not less than 5.24 m & lt 3 & gt, the liquid flow speed in an oil pipe is improved, accordingly, pulverized coal is carried out to the ground, well head produced water is injected into a well bottom again after being settled and filtered through a water pool, and circulation is established. The mechanical diaphragm pump is an adjustable mechanical diaphragm pump, and is matched with the discharge capacity of the tubular pump by adjusting the discharge capacity, and the liquid level in the well is controlled within a reasonable range, so that the phenomenon that the well is flooded and killing is caused, and gas production is influenced is avoided. The well washing process can continuously wash the medium-low gas production well for 24 hours, carry coal dust and reduce the production cost; however, for a high-yield gas well, the well washing process is not suitable, and the main reason is that when the instantaneous gas flow of the gas well is more than 250 m < 3 >/h, a gas cap phenomenon occurs, so that water flow cannot reach an underground injector, and further, the well washing cannot be carried out.
Normally, an automatic circulating well washing process and an automatic hollow rod well washing process are used, a pump-down well washing process is used regularly, the three well washing processes supplement each other, no coal dust and sand precipitation of a pump and a gas anchor is guaranteed, the liquid flow speed in a pipe is improved, and then coal dust and fine sand in produced water of a coal-bed gas well are brought out of the well to a ground sedimentation tank, the purpose of preventing the pump from being blocked by the machine of the coal-bed gas well is achieved, and the pump detection period of the gas well is effectively prolonged.
The utility model provides a coal bed gas well tubular pump well washer takes out structure can guarantee that tubular pump 7 and gas anchor 9 do not have buggy and sand sediment, has improved intraductal liquid flow velocity, can take out the buggy of coal bed gas well extraction aquatic, fine sand underground to ground, reaches coal bed gas well machine and takes out the purpose of pump anti-sticking, effectively prolongs the pump detection cycle of gas well.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to the common design, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;
and finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a structure is taken out to coal bed gas well tubular pump well-flushing machine which characterized in that: the device comprises a casing (20), wherein a tail pipe (12), an air anchor (9), a pump-down well-flushing tool (8), a tubular pump (7) and an oil pipe (18) are sequentially arranged in the casing (20) from bottom to top, and the tail pipe (12) and the air anchor (9) and the tubular pump (7) and the oil pipe (18) are connected through an oil pipe coupling (4);
an aluminum-plastic pipe (19) is arranged between the oil pipe (18) and the sleeve (20), and the bottom end of the aluminum-plastic pipe (19) is connected with the pump-down well-flushing tool (8);
a piston (5), a hollow sucker rod injector (3), a hollow sucker rod coupling (2) and a hollow sucker rod (1) are sequentially arranged in the oil pipe (18) from bottom to top;
a fixed valve (16) and two traveling valves (6) are arranged in the piston (5), and a piston liquid drainage channel (17) is arranged at the top end of the piston (5);
a well-flushing connector guide channel (15) is arranged in the pump-down well-flushing tool (8);
a gas anchor central tube (13) is arranged in the gas anchor (9), and a gas anchor suction inlet (10) is formed in the side wall of the gas anchor (9);
the top end of the hollow sucker rod (1) is provided with a water replenishing port (14), and the top end of the oil pipe (18) is provided with a liquid discharging port (11).
2. The structure is taken out to coal seam gas well tubular pump well washing machine of claim 1, characterized in that: the angle of the well-flushing joint guide channel (15) is set to be 45 degrees.
3. The structure of claim 1 or 2 for pumping the tubular pump well washing machine of the coal-bed gas well is characterized in that: the piston (5), the hollow sucker rod injector (3), the hollow sucker rod coupling (2) and the hollow sucker rod (1) are connected through screw threads.
4. The structure of claim 1, wherein the structure is characterized in that: the top end of the oil pipe (18) is hung on a wellhead device of the coal-bed gas well.
5. The structure is taken out to coal seam gas well tubular pump well washing machine of claim 1, characterized in that: the top end of the hollow sucker rod (1) is connected with a pumping device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221914078.0U CN218150825U (en) | 2022-07-25 | 2022-07-25 | Structure is taken out to coal seam gas well tubular pump well-flushing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221914078.0U CN218150825U (en) | 2022-07-25 | 2022-07-25 | Structure is taken out to coal seam gas well tubular pump well-flushing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218150825U true CN218150825U (en) | 2022-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221914078.0U Active CN218150825U (en) | 2022-07-25 | 2022-07-25 | Structure is taken out to coal seam gas well tubular pump well-flushing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218150825U (en) |
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2022
- 2022-07-25 CN CN202221914078.0U patent/CN218150825U/en active Active
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