CN103629093A - Sand prevention gas-proof tubular pump for drainage and exploitation of coal-bed gas well - Google Patents
Sand prevention gas-proof tubular pump for drainage and exploitation of coal-bed gas well Download PDFInfo
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- CN103629093A CN103629093A CN201310680747.1A CN201310680747A CN103629093A CN 103629093 A CN103629093 A CN 103629093A CN 201310680747 A CN201310680747 A CN 201310680747A CN 103629093 A CN103629093 A CN 103629093A
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Abstract
The invention belongs to the technical field of a tubular pump specially used for the drainage and exploitation of a coal-bed gas well, and particularly relates to a sand prevention gas-proof tubular pump for the drainage and exploitation of the coal-bed gas well. The sand prevention gas-proof tubular pump comprises a plunger assembly, a pump cylinder, a liquid inlet valve assembly and a gas-proof assembly, and is characterized in that the lower end of the pump cylinder is connected with the gas-proof assembly by screw threads; the plunger assembly and the liquid inlet valve assembly are respectively arranged at the upper end and the lower end of the pump cylinder. The sand prevention gas-proof tubular pump has the beneficial effects that the tubular pump is low in cost, simple in structure and high in reliability, the phenomena of sand blocking and 'gas locking' caused in the drainage and exploitation process of the coal-bed gas well can be effectively prevented, and the working efficiency is improved.
Description
Technical field
The invention belongs to the special-purpose tubing pump technical field of coal bed gas well mining, be 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, China's coal bed gas well is more than 3000 mouthful at present, and wherein mining well majority utilizes oil-gas mining tubular type pump to carry out mining operation.Yet, difference due to 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 object of the invention is to overcome above-mentioned deficiency, 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 technical solution adopted for the present invention to solve the technical problems is: 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, and plunger 13 is below 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 for supporting the upper surface of 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 invention has the beneficial effects as follows, 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 invention will be further described.
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 present invention;
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 present invention;
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 present invention;
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 present invention;
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 present invention.
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 that the present invention 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, and plunger 13 is below 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 for supporting the upper surface of 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, make standing valve 32 leakages, cause pump efficiency to reduce, face beam hanger for pumping machine releasably now, 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, control again on plunger 12 and carry, at spring 34, when under 36 effect, liquid feed valve assembly 3 is upspring, with valve seat 33 sand grains above, float, finally utilize plunger 12 suctions can discharge sand grains.
Gas-tight principle: coal bed gas extraction enters after gas-liquid two-phase flow, can be automatically separated because of density variation at hollow tubular 43 places, and gas directly upwards flows along pit shaft, and liquid is directly walked around hollow tubular 43 in screen casing 42 inflow pumps.
During 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.During 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 during 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 of lower end (11) is provided with plunger (13), and plunger (13) is below 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 |
|---|---|---|---|
| CN201310680747.1A CN103629093A (en) | 2013-12-13 | 2013-12-13 | Sand prevention gas-proof tubular pump for drainage and exploitation of coal-bed gas well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310680747.1A CN103629093A (en) | 2013-12-13 | 2013-12-13 | Sand prevention gas-proof tubular pump for drainage and exploitation of coal-bed gas well |
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| CN103629093A true CN103629093A (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310680747.1A Pending CN103629093A (en) | 2013-12-13 | 2013-12-13 | Sand prevention gas-proof tubular pump for drainage and exploitation of coal-bed gas well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840483A (en) * | 2015-02-02 | 2016-08-10 | 中国石油大学(北京) | Sticking and leakage preventing pump used for discharge and mining of coal-bed gas well |
| CN107100592A (en) * | 2017-05-12 | 2017-08-29 | 中国石油大学(华东) | Coal bed gas multi-machine interaction hydraulic-driven mining process system |
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| US5033550A (en) * | 1990-04-16 | 1991-07-23 | Otis Engineering Corporation | Well production method |
| CN2479249Y (en) * | 2001-04-29 | 2002-02-27 | 中国石油天然气股份有限公司 | Forced recovery deep oil well pump |
| CN201031791Y (en) * | 2007-05-10 | 2008-03-05 | 盘锦辽油晨宇集团有限公司光达石油机械厂 | Equal-diameter strong start and stop oil-well pump |
| US20100215528A1 (en) * | 2009-02-24 | 2010-08-26 | Charles Gene Fisher | Double standing valve sucker rod pump |
| CN201802597U (en) * | 2010-10-09 | 2011-04-20 | 中国石油大学(华东) | Coal powder-preventing tubular draining and mining pump |
| CN102287358A (en) * | 2011-08-30 | 2011-12-21 | 中国石油大学(华东) | Long-plunger type dual-barrel coal-dust resistant discharging and extracting pump |
| CN202338296U (en) * | 2011-10-17 | 2012-07-18 | 中国石油天然气股份有限公司 | Built-in sieve tube of coal-bed gas well |
| CN203614375U (en) * | 2013-12-13 | 2014-05-28 | 贵州盘江煤层气开发利用有限责任公司 | Sand-controlled gas-controlled tubing pump for production of coal bed gas well |
-
2013
- 2013-12-13 CN CN201310680747.1A patent/CN103629093A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5033550A (en) * | 1990-04-16 | 1991-07-23 | Otis Engineering Corporation | Well production method |
| CN2479249Y (en) * | 2001-04-29 | 2002-02-27 | 中国石油天然气股份有限公司 | Forced recovery deep oil well pump |
| CN201031791Y (en) * | 2007-05-10 | 2008-03-05 | 盘锦辽油晨宇集团有限公司光达石油机械厂 | Equal-diameter strong start and stop oil-well pump |
| US20100215528A1 (en) * | 2009-02-24 | 2010-08-26 | Charles Gene Fisher | Double standing valve sucker rod pump |
| CN201802597U (en) * | 2010-10-09 | 2011-04-20 | 中国石油大学(华东) | Coal powder-preventing tubular draining and mining pump |
| CN102287358A (en) * | 2011-08-30 | 2011-12-21 | 中国石油大学(华东) | Long-plunger type dual-barrel coal-dust resistant discharging and extracting pump |
| CN202338296U (en) * | 2011-10-17 | 2012-07-18 | 中国石油天然气股份有限公司 | Built-in sieve tube of coal-bed gas well |
| CN203614375U (en) * | 2013-12-13 | 2014-05-28 | 贵州盘江煤层气开发利用有限责任公司 | Sand-controlled gas-controlled tubing pump for production of coal bed gas well |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840483A (en) * | 2015-02-02 | 2016-08-10 | 中国石油大学(北京) | Sticking and leakage preventing pump used for discharge and mining of coal-bed gas well |
| CN107100592A (en) * | 2017-05-12 | 2017-08-29 | 中国石油大学(华东) | Coal bed gas multi-machine interaction hydraulic-driven mining process system |
| CN107100592B (en) * | 2017-05-12 | 2019-07-09 | 中国石油大学(华东) | Coal bed gas multi-machine interaction hydraulic-driven mining process system |
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| CB02 | Change of applicant information |
Address after: Lin Cheng Xi Lu Lake District 550081 Guizhou city of Guiyang province No. 95 seven floor Applicant after: Guizhou Pan Jiang cbm development utilizes Co., Ltd Address before: 550081 Guizhou Province, Guiyang City Lake District century Jin Yuan shopping center business building D block 15 layer Applicant before: Guizhou Pan Jiang cbm development utilizes Co., Ltd |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20140312 |