CN203614375U - Sand-controlled gas-controlled tubing pump for production of coal bed gas well - Google Patents
Sand-controlled gas-controlled tubing pump for production of coal bed gas well Download PDFInfo
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- CN203614375U CN203614375U CN201320821663.0U CN201320821663U CN203614375U CN 203614375 U CN203614375 U CN 203614375U CN 201320821663 U CN201320821663 U CN 201320821663U CN 203614375 U CN203614375 U CN 203614375U
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- valve
- gas
- pump
- assembly
- coal bed
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- 239000003245 coal Substances 0.000 title claims abstract description 30
- 239000004576 sand Substances 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000005065 mining Methods 0.000 claims description 22
- 210000002445 nipple Anatomy 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 7
- 238000000605 extraction Methods 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model belongs to the technical field of a special-purpose tubing pump for the production of a coal bed gas well, and specifically relates to a sand-controlled gas-controlled tubing pump for the production of the coal bed gas well. The tubing pump comprises a plunger assembly, a pump barrel, a liquid inlet valve assembly and a gas-controlled assembly. The tubing pump is characterized in that the lower end of the pump barrel is connected with the gas-controlled assembly via screw threads, and the plunger assembly and the liquid inlet valve assembly are respectively located at the upper end and the lower end in the pump barrel. The tubing pump has the benefits that the cost is low, the structure is simple, the reliability is high, the occurrence of sand sticking and gas locking phenomena during the production of coal bed gas can be effectively prevented, and working efficiency is improved.
Description
Technical field
The utility model belongs to the special tubing pump technical field of coal bed gas well mining, is specifically related to a kind of sand control gas-tight tubing pump for coal bed gas well mining.
Background technique
Along with the business-like success of the exemplary project of Qinshui Basin In Shanxi Province coal-seam gas, the cbm development of China has been transitioned into the production phase from the exploration phase, more than 3000 mouthful of China's coal bed gas well at present, wherein mining well majority utilizes oil-gas mining tubular type pump to carry out mining operation.But, due to the difference of coal-seam gas self reservoir properties feature and conventional gas and oil, make the coal bed gas well mining stage often occur the situation of coal dust holddown, gas top pump standing valve, thereby often there is following problem: coal dust holddown easily occurs in (1) coal bed gas extraction process, tubing pump standing valve is leaked, cause the pump efficiency of tubing pump to reduce, when serious, even do not take out water.(2) because of submergence lower (stable yields stage 10-30m), the stage coal-seam gas that causes giving vent to anger is easily scurried into tubing pump, occurs " gas lock " phenomenon.Thus, have a strong impact on the normal mining work of coal bed gas well, reduced the returns of investment of coal-seam gas.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and the sand control gas-tight tubing pump for coal bed gas well mining of a kind of simple in structure, sands-proof check, anti-" gas lock " is provided.
The utility model solves the technological scheme that its technical problem adopts: a kind of sand control gas-tight tubing pump for coal bed gas well mining, comprise plunger piston assembly 1, pump barrel 2, liquid feed valve assembly 3 and gas-tight assembly 4, it is characterized in that, pump barrel 2 lower ends and gas-tight assembly 4 are with screwed connection, and plunger piston assembly 1 and liquid feed valve assembly 3 lay respectively at the top and bottom of 2 li of pump barrels.
Particularly, described pump barrel 2 adopts conventional gas and oil tubing pump structure, and pump barrel 2 lower ends are provided with supports orifice plate 21, and orifice plate lower end is provided with a valve seat 22.
Particularly, the two ends up and down of described plunger piston assembly 1 adopt double-valve structure, and its top and bottom are traveling valve 11, and the traveling valve 11 of lower end is provided with plunger 13, below plunger with rubber washer 12.
Particularly, described liquid feed valve assembly 3 comprises valve bonnet 31, standing valve 32, valve seat 33, spring 34, hollow plug 35, spring 36, spheroid 37 and hollow tubular pipe nipple 38, described valve bonnet 31 is positioned at standing valve 32 upper ends, valve bonnet 31 is annular space below, annular space lower end is provided with the standing valve 32 being placed on valve seat 33, spring 34 has been fixed in valve seat 33 lower ends, spring 34 lower ends are the upper surface that supports orifice plate 21, valve seat 33 lower ends are connected to a hollow tubular pipe nipple 38, hollow tubular pipe nipple 38 lower ends are provided with hollow plug 35, hollow plug 35 is connected with the spring 36 of spheroid 37 below with lower end.
Particularly, described gas-tight assembly 4 comprises screw thread 41, screen casing 42, hollow tubular 43, sealing gasket 44 and plug 45, described hollow tubular 43 is connected by plug 45 with screen casing 42, screen casing 42 tops are provided with screw thread 41 for connecting pump barrel 2, between screen casing 42 bottoms and plug 45, be provided with sealing gasket 44, hollow tubular 43 and its interior concentric placement of screen casing 42 and isometric.
The beneficial effects of the utility model are that with low cost, simple in structure, reliability is high, can effectively prevent the generation of coal bed gas extraction process medium sand card and " gas lock " phenomenon, increases work efficiency.
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of sand control gas-tight tubing pump for coal bed gas well mining of the utility model;
Fig. 2 is the structural representation of the plunger piston assembly of a kind of sand control gas-tight tubing pump for coal bed gas well mining of the utility model;
Fig. 3 is the structural representation of the pump barrel of a kind of sand control gas-tight tubing pump for coal bed gas well mining of the utility model;
Fig. 4 is the structural representation of the liquid feed valve assembly of a kind of sand control gas-tight tubing pump for coal bed gas well mining of the utility model;
Fig. 5 is the structural representation of the gas-tight assembly of a kind of sand control gas-tight tubing pump for coal bed gas well mining of the utility model.
In figure:
1, plunger piston assembly, 2, pump barrel, 3, liquid feed valve assembly, 4, gas-tight assembly, 11, traveling valve, 12, rubber washer, 13, plunger, 21, support orifice plate, 22, valve seat, 31, valve bonnet, 32, standing valve, 33, valve seat, 34, spring, 35, hollow plug, 36, spring, 37, spheroid, 38, hollow tubular pipe nipple, 41, screw thread, 42, screen casing, 43, hollow tubular, 44, sealing gasket, 45, plug.
Embodiment
As shown in Fig. 1～5, a kind of sand control gas-tight tubing pump for coal bed gas well mining the utility model proposes, comprise plunger piston assembly 1, pump barrel 2, liquid feed valve assembly 3 and gas-tight assembly 4, it is characterized in that, pump barrel 2 lower ends are connected with screw thread 41 with gas-tight assembly 4, and plunger piston assembly 1 and liquid feed valve assembly 3 lay respectively at the top and bottom of 2 li of pump barrels.
Particularly, described pump barrel 2 adopts conventional gas and oil tubing pump structure, and pump barrel 2 lower ends are provided with supports orifice plate 21, and orifice plate lower end is provided with a valve seat 22.
Particularly, the two ends up and down of described plunger piston assembly 1 adopt double-valve structure, and its top and bottom are traveling valve 11, and the traveling valve 11 of lower end is provided with plunger 13, below plunger with rubber washer 12.
Particularly, described liquid feed valve assembly 3 comprises valve bonnet 31, standing valve 32, valve seat 33, spring 34, hollow plug 35, spring 36, spheroid 37 and hollow tubular pipe nipple 38, described valve bonnet 31 is positioned at standing valve 32 upper ends, valve bonnet 31 is annular space below, annular space lower end is provided with the standing valve 32 being placed on valve seat 33, spring 34 has been fixed in valve seat 33 lower ends, spring 34 lower ends are the upper surface that supports orifice plate 21, valve seat 33 lower ends are connected to a hollow tubular pipe nipple 38, hollow tubular pipe nipple 38 lower ends are provided with hollow plug 35, hollow plug 35 is connected with the spring 36 of spheroid 37 below with lower end.
Particularly, described gas-tight assembly 4 comprises screw thread 41, screen casing 42, hollow tubular 43, sealing gasket 44 and plug 45, described hollow tubular 43 is connected by plug 45 with screen casing 42, screen casing 42 tops are provided with screw thread 41 for connecting pump barrel 2, between screen casing 42 bottoms and plug 45, be provided with sealing gasket 44, hollow tubular 43 and its interior concentric placement of screen casing 42 and isometric.
Sand control principle: after coal bed gas well mining a period of time, the coal grain returning out in coal seam often can be deposited on valve seat 33, standing valve 32 is missed, cause pump efficiency to reduce, now face beam hanger for pumping machine releasably, control plunger 12 and clash into liquid feed valve assembly 3 downwards, under the shock of plunger 12, liquid feed valve assembly 3 moves downward, first the spheroid 37 of its bottom blocks the valve seat 22 of pump barrel 2 lower ends, liquid feed valve assembly 3 continues to move downward, then extruded hollow plug 35 lower end liquid upwards rinse the coal grain of deposition on valve seat 33, after the certain distance of plunger piston assembly 3 operation downwards, manipulate again on plunger 12 and carry, at spring 34, when under 36 effect, liquid feed valve assembly 3 is upspring, float with valve seat 33 sand grains above, finally utilize plunger 12 suctions can discharge sand grains.
Gas-tight principle: coal bed gas extraction enters after gas-liquid two-phase flow, at hollow tubular 43 places, because density variation can separate automatically, gas directly upwards flows along pit shaft, and liquid is directly walked around hollow tubular 43 in screen casing 42 inflow pumps.
When upstroke, plunger 13 moves upward, the managed interior head of liquid of traveling valve 11 above piston and closing, now, (below plunger) pressure decreased in pump, standing valve 32 is opened under the effect of the difference of annular space head of liquid and pump internal pressure, thereby sucks liquid.When down stroke, sucker rod moves downward with plunger 13, and standing valve 32 is now in closed condition, pump internal pressure is greater than plunger 13 above when head of liquid, traveling valve 11 is backed down, and plunger 13 liquid below enters plunger 13 tops by traveling valve 11, and now pump is discharged liquid.Thus, plunger 13 pumps, and tubing pump has completed a suction period.
Claims (5)
1. the sand control gas-tight tubing pump for coal bed gas well mining, comprise plunger piston assembly (1), pump barrel (2), liquid feed valve assembly (3) and gas-tight assembly (4), it is characterized in that, pump barrel (2) lower end is connected with screw thread (41) with gas-tight assembly (4), and plunger piston assembly (1) and liquid feed valve assembly (3) lay respectively at the inner top and bottom of pump barrel (2).
2. a kind of sand control gas-tight tubing pump for coal bed gas well mining according to claim 1, described liquid feed valve assembly (3) comprises valve bonnet (31), standing valve (32), valve seat (33), spring (34), hollow plug (35), spring (36), spheroid (37) and hollow tubular pipe nipple (38), it is characterized in that, described valve bonnet (31) is positioned at standing valve (32) upper end, valve bonnet (31) is annular space below, annular space lower end is provided with the standing valve (32) being placed on valve seat (33), spring (34) has been fixed in valve seat (33) lower end, spring (34) lower end is for supporting the upper surface of orifice plate (21), valve seat (33) lower end is connected to a hollow tubular pipe nipple (38), hollow tubular pipe nipple (38) lower end is provided with hollow plug (35), hollow plug (35) is connected with the spring (36) of spheroid (37) below with lower end.
3. a kind of sand control gas-tight tubing pump for coal bed gas well mining according to claim 1, described gas-tight assembly (4) comprises screw thread (41), screen casing (42), hollow tubular (43), sealing gasket (44) and plug (45), it is characterized in that, described hollow tubular (43) is connected by plug (45) with screen casing (42), screen casing (42) top is provided with screw thread (41) for connecting pump barrel (2), between screen casing (42) bottom and plug (45), be provided with sealing gasket (44), hollow tubular (43) and its interior concentric placement of screen casing (42) and isometric.
4. according to a kind of sand control gas-tight tubing pump for coal bed gas well mining described in claim 1 or 2 or 3, it is characterized in that, the two ends up and down of described plunger piston assembly (1) adopt double-valve structure, its top and bottom are traveling valve (11), the traveling valve (11) of lower end is provided with plunger (13), below plunger with rubber washer (12).
5. according to a kind of sand control gas-tight tubing pump for coal bed gas well mining described in claim 1 or 2 or 3, it is characterized in that, described pump barrel (2) adopts conventional gas and oil tubing pump structure, and pump barrel (2) lower end is provided with supports orifice plate (21), and orifice plate lower end is provided with a valve seat (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320821663.0U CN203614375U (en) | 2013-12-13 | 2013-12-13 | Sand-controlled gas-controlled tubing pump for production of coal bed gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320821663.0U CN203614375U (en) | 2013-12-13 | 2013-12-13 | Sand-controlled gas-controlled tubing pump for production of coal bed gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203614375U true CN203614375U (en) | 2014-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320821663.0U Expired - Fee Related CN203614375U (en) | 2013-12-13 | 2013-12-13 | Sand-controlled gas-controlled tubing pump for production of coal bed gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203614375U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629093A (en) * | 2013-12-13 | 2014-03-12 | 贵州盘江煤层气开发利用有限责任公司 | Sand prevention gas-proof tubular pump for drainage and exploitation of coal-bed gas well |
-
2013
- 2013-12-13 CN CN201320821663.0U patent/CN203614375U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629093A (en) * | 2013-12-13 | 2014-03-12 | 贵州盘江煤层气开发利用有限责任公司 | Sand prevention gas-proof tubular pump for drainage and exploitation of coal-bed gas well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |