CN205001159U - Buggy row that prevents that coal seam gas well used adopts pump - Google Patents

Abstract

The utility model discloses an anti-coal pulverized extraction pump used in coalbed gas wells, comprising a lower joint, a fixed valve, a downstream floating valve, a long plunger, a short pump barrel, an upper joint, a sucker rod joint, an upstream floating valve, and a short pump. There is a matching long plunger inside the barrel, the lower end of the long plunger is fixed with a downstream floating valve, and the upper end of the long plunger is provided with an upstream floating valve, which is characterized in that: the outer wall of the upper end of the upper collar passes through the upper outer pipe and The upper joint is fixedly connected, the short pump barrel is located in the upper outer tube cavity, the lower end of the upper coupling is connected and fixed with the lower coupling through the middle outer tube, the lower floating valve is located in the middle outer tube cavity, and the lower end of the lower coupling is connected with the lower outer tube through the lower outer tube. The lower joint is fixedly connected, and a fixed valve is arranged in the lower outer lumen, and the lower end of the fixed valve is fixedly arranged on the upper end of the central hole of the lower joint through a support tube. The utility model effectively solves the problem that the pulverized coal is stuck in the pump and the fixed valve is buried in the conventional pump, prolongs the pump inspection period, improves the system efficiency, and reduces the mining cost.

Description

Anti-coal pulverized drainage pump used in coalbed methane wells

technical field

The utility model relates to an improvement of a drainage gas recovery pump, in particular to a coal powder prevention drainage pump used in coal bed gas wells.

Background technique

In the exploitation of coalbed methane, there is usually accumulated water in the well, and the liquid in the well needs to be drained away, and the gas needs to be exploited to be discharged to the ground smoothly. At present, most of the drainage pumps used in coalbed methane wells are conventional tubular pumps, which are prone to pump jamming and pulverized coal buried fixed valves.

Contents of the invention

The purpose of this utility model is to provide a kind of anti-coal pulverized drainage pump used in coalbed gas wells with simple structure, easy to use, which can effectively prevent the problem of pulverized coal stuck in the pump and fixed valve being buried, and prolong the service life.

In order to achieve the above purpose, the technical solution adopted by the utility model is: the anti-coal pulverized coal drainage pump used in the coalbed methane well includes a lower joint, a fixed valve, a downstream moving valve, a long plunger, a short pump barrel, an upper joint, and a pumping pump. The oil rod joint and the upstream floating valve, the short pump barrel is equipped with a matching long plunger, the lower end of the long plunger is fixed with a downstream floating valve, the upper end of the long plunger is equipped with an upstream floating valve, and the upstream floating valve The upper end of the pump is fixedly connected with the sucker rod through the sucker rod joint, and the lower end of the short pump barrel is fixedly provided with an upper coupling, which is characterized in that: the outer wall of the upper end of the upper coupling is fixedly connected with the upper joint through the upper outer pipe, and the short pump barrel is located at In the upper outer lumen, the lower end of the upper collar is connected and fixed with the lower collar through the middle outer tube. The downstream floating valve is located in the middle outer lumen. A fixed valve is arranged inside, and the lower end of the fixed valve is fixedly arranged on the upper end of the central hole of the lower joint through a support tube.

The upper floating valve is connected and fixed with the upper end of the long plunger through a double-ended threaded connecting pipe.

The beneficial effect of the utility model is that: effectively solve the problems of the pulverized coal stuck in the pump and the fixed valve buried in the conventional pump, prolong the pump inspection period, improve the system efficiency, and reduce the mining cost.

Description of drawings

Fig. 1 is a schematic cross-sectional view of the structure of the utility model.

In the figure: 1. Lower joint; 2. Support pipe; 3. Fixed valve; 4. Lower outer pipe; 5. Lower collar; 6. Downstream floating valve; 7. Middle outer pipe; 8. Long plunger; 9. 10. Short pump barrel; 11. Upper outer pipe; 12. Upper joint; 13. Upstream floating valve; 14. Sucker rod joint; 15. Double threaded connecting pipe.

detailed description

Make the utility model with reference to Fig. 1. The pulverized coal discharge prevention pump used in this coalbed methane well includes a lower joint 1, a fixed valve 3, a lower traveling valve 6, a long plunger 8, a short pump barrel 10, an upper joint 12, a sucker rod joint 14 and an upper traveling valve 13. The short pump barrel 10 is provided with a matching long plunger 8, the lower end of the long plunger 8 is fixed with a downstream traveling valve 6, the upper end of the long plunger 8 is provided with an upstream traveling valve 13, and the upper end of the long plunger 8 is provided with an upstream traveling valve 13. The upper end of the pump is fixedly connected with the sucker rod through the sucker rod joint 14, and the lower end of the short pump barrel 10 is fixed with an upper collar 9, which is characterized in that the outer wall of the upper end of the upper collar 9 is fixed with the upper joint 12 through the upper outer tube 11 connection, the short pump barrel 10 is located in the cavity of the upper outer tube 11, the lower end of the upper coupling 9 is connected and fixed with the lower coupling 5 through the middle outer tube 7, the downstream floating valve 6 is located in the cavity of the middle outer tube 7, and the lower end of the lower coupling 5 The lower outer tube 4 is fixedly connected with the lower joint 1, and a fixed valve 3 is arranged in the cavity of the lower outer tube 4, and the lower end of the fixed valve 3 is fixedly arranged on the upper end of the center hole of the lower joint 1 through the support tube 2.

The upper floating valve 13 is connected and fixed with the upper end of the long plunger 8 through a double-ended threaded connecting pipe 15 .

When using the utility model, the short pump cylinder 10 cooperates with the long plunger 8 to form a dynamic seal. The short pump barrel 10 is relatively static, and the long plunger 8 moves up and down to realize the increase and decrease of the volume and provide power for liquid discharge. The utility model itself has no power device, and the pumping unit on the ground drives the long plunger 8 to reciprocate up and down through the sucker rod to realize drainage. When the sucker rod moves upward, it drives the plunger assembly (the plunger assembly includes the downstream traveling valve 6, the long plunger 8, the double-ended threaded connecting pipe 15, the upstream traveling valve 13, and the sucker rod joint 14) to move upward. , the upstream floating valve 13 and the downstream floating valve 6 are closed under the action of their own weight, the space between the downstream floating valve 6 and the fixed valve 3 increases, the pressure decreases, the fixed valve 3 opens under the pressure of the well fluid, and the well fluid enters In the cavity of the middle outer tube 7. When the sucker rod moves downward, the space between the downstream traveling valve 6 and the fixed valve 3 decreases, and the pressure increases. Under the action of the pressure, the fixed valve 3 closes, and the downstream traveling valve 6 and the upstream traveling valve 13 open. The well fluid is discharged to the top of the upper joint 12 from the cavity of the middle outer pipe 7 . During the operation of the plunger, solid debris such as sand particles in the well fluid will sink into the cavity of the upper outer tube 11 or the cavity of the lower outer tube 4 due to gravity, preventing the sand particles from entering between the short pump barrel 10 and the long plunger 8 Causing stagnation, preventing sand grains from depositing on the upper part of the fixed valve 3 to cause failure.

Claims (2)

1. the anti-coal dust mining pump of coal bed gas well use, comprise lower contact (1), standing valve (3), lower travelling valve (6), long-plunger (8), short pump barrel (10), upper connection (12), rod connector (14) and upper travelling valve (13), suitable long-plunger (8) is provided with in short pump barrel (10), the lower end of long-plunger (8) is fixed with lower travelling valve (6), long-plunger (8) upper end is provided with upper travelling valve (13), the upper end of upper travelling valve (13) is fixedly connected with sucker rod by rod connector (14), the lower end of short pump barrel (10) is fixed with box cupling (9), it is characterized in that: the upper end outer wall of upper box cupling (9) is fixedly connected with upper connection (12) by top outer tube (11), short pump barrel (10) is positioned at top outer tube (11) chamber, upper box cupling (9) lower end is connected and fixed by middle part outer tube (7) and lower box cupling (5), lower travelling valve (6) is positioned at outer tube (7) chamber, middle part, the lower end of lower box cupling (5) is fixedly connected with lower contact (1) by lower outer tubes (4), standing valve (3) is provided with in lower outer tubes (4) chamber, the lower end of standing valve (3) is fixedly installed on the center hole upper end of lower contact (1) by support tube (2).

2. the anti-coal dust mining pump of coal bed gas well use according to claim 1, is characterized in that: described upper travelling valve (13) is connected and fixed by the upper end of double thread screw connecting tube (15) with long-plunger (8).