CN106869867B - Washable well coal bed gas drainage and production equipment - Google Patents
Washable well coal bed gas drainage and production equipment Download PDFInfo
- Publication number
- CN106869867B CN106869867B CN201710228790.2A CN201710228790A CN106869867B CN 106869867 B CN106869867 B CN 106869867B CN 201710228790 A CN201710228790 A CN 201710228790A CN 106869867 B CN106869867 B CN 106869867B
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- China
- Prior art keywords
- oil pipe
- pump
- hollow rod
- plunger
- wall
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- 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.)
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 239000003245 coal Substances 0.000 title claims abstract description 25
- 238000005406 washing Methods 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000007667 floating Methods 0.000 claims abstract description 7
- 238000000605 extraction Methods 0.000 claims abstract 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 239000002817 coal dust Substances 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000011144 upstream manufacturing Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention relates to coal bed gas exploitation equipment which can be used for well washing and coal bed gas extraction, and the equipment comprises an oil pipe, a hollow rod and a well washing and extraction pump, wherein the lower part of the hollow rod is arranged in the oil pipe, the lower ends of the hollow rod and the oil pipe are connected with the well washing and extraction pump, the well washing and extraction pump comprises an oil pipe joint, the upper end of the oil pipe joint is connected with the oil pipe, the outer wall of the lower part of the oil pipe joint is connected with an outer cylinder, the lower end of the outer cylinder is connected with a tail joint, the inner wall of the lower part of the oil pipe joint is connected with a pump cylinder, the upper part in the pump cylinder is provided with a plunger, the upper end of the plunger is connected with the hollow rod, the lower part of the plunger is internally provided with a floating valve, the middle part in the pump cylinder is provided with a fixed valve, the outer wall of the lower part of the pump cylinder is sleeved with a sliding sleeve, the lower part of the sliding sleeve is connected with a spring, and the lower end of the spring is connected with the tail joint. The invention can carry out oil pipe well washing operation at any time in the production process, does not damage the coal bed, can wash out the coal dust in the pump cylinder and the liquid production pipe to the ground, and reduces the pump detection period.
Description
Technical Field
The invention relates to coal bed gas exploitation equipment, in particular to washable well coal bed gas drainage and exploitation equipment for coal bed gas exploitation.
Background
In the process of developing the coal bed gas by using the existing coal bed gas drainage and production equipment, along with the reduction of coal bed water, the coal bed produced water is less and less, the coal dust content of the produced water is higher and higher, in addition, after the coal bed gas production well is fractured, the coal dust content is high, and fine coal particles (sand) in an oil pipe can be continuously deposited under the action of self weight, so that the phenomena of pump valve blockage or pump clamping and the like are caused; at present, the problem is solved only by a measure of frequently checking the pump in workover treatment, the time for normally draining water and producing gas is reduced, and the workover cost is increased.
Disclosure of Invention
The invention aims to provide the coal bed methane drainage and production equipment capable of washing the well at any time, preventing coal powder from blocking a pump valve or blocking the pump and reducing the pump detection period.
The technical scheme of the invention is as follows:
the washable well coal bed gas drainage and production equipment comprises an oil pipe, a hollow rod and a washed well drainage and production pump, wherein the lower portion of the hollow rod is arranged in the oil pipe, the lower end of the hollow rod and the lower end of the oil pipe are connected with the washed well drainage and production pump, the washed well drainage and production pump comprises an oil pipe joint, the upper end of the oil pipe joint is connected with the oil pipe, the lower inner wall of the oil pipe joint is provided with a boss, the boss is provided with a communication hole, the outer wall of the lower portion of the oil pipe joint is connected with an outer cylinder, the lower end of the outer cylinder is connected with a tail joint, the inner wall of the lower portion of the oil pipe joint is connected with a pump cylinder, the inner wall of the lower portion of the pump cylinder is provided with a plunger, the upper end of the plunger is connected with the hollow rod, the plunger is of a hollow structure, the lower portion of the plunger is internally provided with a floating valve, the middle portion of the pump cylinder is provided with a washed well hole, the outer wall of the lower portion of the pump cylinder is sleeved with a sliding sleeve, the middle portion of the sliding sleeve is provided with a pressure balance hole, the outer wall of the sliding sleeve is provided with an annular sealing boss, the lower portion of the spring, and the lower portion of the spring is connected with the tail joint.
The plunger upper end body is connected with the hollow pull rod, the upper end of the hollow pull rod is provided with a hollow rod joint, and the hollow rod joint is connected with the hollow rod.
An upstream movable valve and a downstream movable valve are arranged in the plunger, and an upper fixed valve and a lower fixed valve are arranged in the pump barrel.
The well-flushing hole is located at the lower fixed valve.
And a sliding sleeve seat is arranged on the inner wall of the lower part of the outer barrel.
The upper part of the hollow rod is communicated with a liquid outlet pipeline, and the water injection pry is communicated with the annular space between the hollow rod and the oil pipe through a well washing pipeline.
The invention can carry out oil pipe well washing operation at any time in the production process, does not destroy a coal bed, can wash out the coal dust in the pump cylinder and the liquid production pipe to the ground, thoroughly prevents the coal dust from blocking a pump valve or blocking a pump, reduces the pump detection period, promotes continuous and stable drainage and production, and reduces the drainage and production cost.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of the structure of a well-flushing drainage pump.
1. The hollow rod joint 2, the hollow pull rod 3, the oil pipe joint 4, the upstream movable valve 5, the plunger 6, the downstream movable valve 7, the pump barrel 8, the fixed valve 9, the fixed valve 10, the outer barrel 11, the sliding sleeve 12, the spring 13, the tail joint 14, the annular sealing boss 15, the hollow rod 16, the well-washing and production pump 17, the oil pipe 18, the sleeve 19, the water injection skid 20, the well-washing pipeline 21, the liquid-outlet pipeline 22, the communication hole H1, the communication hole H2, the well-washing hole H3 and the balance hole are formed.
Detailed Description
The coal bed gas drainage and production equipment capable of well washing comprises an oil pipe 17, a hollow rod 15 and a well washing drainage and production pump 16, wherein the lower portion of the hollow rod 15 is arranged in the oil pipe 17, the lower ends of the hollow rod 15 and the oil pipe 17 are connected with the well washing drainage and production pump 16, the upper portion of the hollow rod 15 is communicated with a liquid outlet pipeline 22, and a water injection pry 19 is communicated with an annular space between the hollow rod 15 and the oil pipe 17 through a well washing pipeline 20.
The well washing and discharging and extracting pump 16 comprises an oil pipe 17 connector 3, the upper end of the oil pipe 17 connector 3 is connected with an oil pipe 17, the inner wall of the lower part of the oil pipe 17 connector 3 is provided with a boss, a communicating hole H1 is formed in the boss, the outer wall of the lower part of the oil pipe 17 connector 3 is connected with an outer barrel 10, the lower end of the outer barrel 10 is connected with a tail connector 13, the inner wall of the lower part of the oil pipe 17 connector 3 is connected with a pump barrel 7, a plunger 5 is installed at the inner upper part of the pump barrel 7, the upper end of the plunger 5 is integrally connected with a hollow pull rod 2, the upper end of the hollow pull rod 2 is provided with a hollow rod 15 connector 1, the hollow rod 15 connector 1 is connected with a hollow rod 15, the plunger 5 is of a hollow structure, an upper floating valve 4 and a lower floating valve 6 are arranged in the lower part of the plunger 5, an upper fixed valve 8 and a lower fixed valve 9 are arranged in the middle part of the pump barrel 7, a well washing hole H2 is formed in the lower fixed valve 9 of the pump barrel 7, a sliding sleeve 11 in the lower part of the sliding sleeve 11, a sliding sleeve 11 is provided with a sliding sleeve 11, an annular sealing boss 14 is arranged on the sliding sleeve 11, the sliding sleeve 11 is connected with a spring 12, the lower part of the sliding sleeve 12, and the sliding sleeve 12 is connected with a spring connector 13.
When the oil pumping unit works, the upper end of an oil pipe 17 is hermetically connected with a Christmas tree, a hollow rod 15 is connected with a ground oil pumping unit, a gas production pipeline 21 is communicated with an annular space between the oil pipe 17 and a sleeve 18, when normal drainage production is carried out, a plunger 5 moves upwards, the pressure in a pump cylinder 7 is reduced, an upper fixed valve 8 and a lower fixed valve 9 are opened, and liquid in a well enters the pump cylinder 7 from the upper fixed valve 8; during downstroke, the plunger 5 moves downwards, the pressure in the pump cylinder 7 rises, the upper fixed valve 8 and the lower fixed valve 9 are closed, the upstream movable valve 4 and the downstream movable valve 6 are opened, and the liquid in the pump cylinder 7 is discharged into the hollow pull rod 2; as the pump continues to pump, the liquid carries the entrained coal fines to the surface and the coal bed gas passes from the annular space between the tubing 17 and casing 18 into the production line 21.
During well washing, well washing liquid is pressurized through the water injection pry 19 and sequentially passes through an oil pipe 17, an annular space of the hollow rod 15, a communication hole H1, a pump barrel 7 and an annular space of the outer barrel 10, the sliding sleeve 11 moves downwards under the hydraulic action of the well washing liquid, the sliding sleeve 11 moves downwards to a well washing hole H2 formed in the side wall of the opened lower fixed valve 9, at the moment, the pump barrel 7 and the annular space of the outer barrel 10 are communicated with an inner hole of the plunger 5, the well washing liquid enters the liquid production pipe through the upper fixed valve 8, the downstream movable valve 6 and the upstream movable valve 4, so that the lower fixed valve 9, the upper fixed valve 8, the downstream movable valve 6 and the upstream movable valve 4 are cleaned, and pulverized coal in the lower fixed valve 9, the upper fixed valve 8, the downstream movable valve 6 and the upstream movable valve 4 is carried to the ground by the cleaning liquid and discharged to a ground water tank.
Finally, it should be noted that the above examples are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (4)
1. The coal bed gas drainage and production equipment is characterized by comprising an oil pipe, a hollow rod and a well washing drainage and production pump, wherein the lower portion of the hollow rod is arranged in the oil pipe, the lower ends of the hollow rod and the oil pipe are connected with the well washing drainage and production pump, the well washing drainage and production pump comprises an oil pipe connector, the upper end of the oil pipe connector is connected with the oil pipe, the inner wall of the lower portion of the oil pipe connector is provided with a boss, the boss is provided with a communicating hole, the outer wall of the lower portion of the oil pipe connector is connected with an outer barrel, the inner wall of the lower portion of the outer barrel is provided with a sliding sleeve seat, the lower end of the outer barrel is connected with a tail connector, the inner wall of the lower portion of the oil pipe connector is connected with a pump barrel, the upper portion of the pump barrel is provided with a plunger, the upper end of the plunger is connected with a hollow rod, the plunger is of a hollow structure, the lower portion of the plunger is provided with a floating valve which comprises an upper floating valve and a lower floating valve, the middle portion of the pump barrel is provided with a fixed valve, the middle portion of the pump barrel, the sliding sleeve is provided with a pressure balance hole, the outer wall of the sliding sleeve, the outer wall is provided with an annular sealing boss, the sliding sleeve is provided with an annular sealing spring, and the lower portion of the spring, and the lower end of the spring is connected with the tail connector.
2. The washable well coal seam gas drainage and extraction equipment as recited in claim 1, wherein the upper end of the plunger is integrally connected with a hollow pull rod, the upper end of the hollow pull rod is provided with a hollow rod joint, and the hollow rod joint is connected with the hollow rod.
3. The washable well coalbed methane production apparatus of claim 1 wherein said washhole is located at a lower fixed valve.
4. The washable well coal seam gas drainage and production equipment as claimed in claim 1, wherein the upper part of the hollow rod is communicated with a liquid outlet pipeline, and the water injection pry is communicated with the annular space between the hollow rod and the oil pipe through the well washing pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710228790.2A CN106869867B (en) | 2017-04-10 | 2017-04-10 | Washable well coal bed gas drainage and production equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710228790.2A CN106869867B (en) | 2017-04-10 | 2017-04-10 | Washable well coal bed gas drainage and production equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106869867A CN106869867A (en) | 2017-06-20 |
| CN106869867B true CN106869867B (en) | 2023-03-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710228790.2A Active CN106869867B (en) | 2017-04-10 | 2017-04-10 | Washable well coal bed gas drainage and production equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106869867B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927398B (en) * | 2019-05-13 | 2022-08-30 | 中国石油天然气股份有限公司 | Coal bed gas production system and gas production method |
| CN111335846B (en) * | 2020-04-26 | 2022-10-25 | 贵阳鑫睿材料科技有限公司 | Coal bed gas exploitation well-flushing equipment |
| CN114151061B (en) * | 2021-12-13 | 2023-06-30 | 东营市福利德石油科技开发有限责任公司 | Coal dust prevention device for coal bed gas production |
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|---|---|---|---|---|
| CN2434447Y (en) * | 2000-03-21 | 2001-06-13 | 张弘韬 | Hollow rod sand sucking and oil extracting appts |
| CN201381812Y (en) * | 2009-03-13 | 2010-01-13 | 东营市兆鑫工贸有限责任公司 | Well flushing tool |
| CN102155393A (en) * | 2011-04-26 | 2011-08-17 | 张春生 | Novel oil-well pump capable of cleaning well during oil extraction |
| CN102536142A (en) * | 2012-02-07 | 2012-07-04 | 中国石油天然气股份有限公司 | Method for pumping and washing coal bed methane discharge well uninterruptedly |
| CN102536144A (en) * | 2011-12-30 | 2012-07-04 | 中国石油天然气股份有限公司 | Coal-seam gas dual-channel well-washing valve |
| CN202531405U (en) * | 2012-02-07 | 2012-11-14 | 中国石油天然气股份有限公司 | Concentric-pipe type pump for coal-bed methane |
| CN103790529A (en) * | 2014-01-21 | 2014-05-14 | 中国海洋石油总公司 | Coalbed methane drainage extraction and backwashing device and method |
| CN104329242A (en) * | 2014-09-05 | 2015-02-04 | 胜利油田北方实业集团有限责任公司 | Pipe type oil suction pump |
| CA2881498A1 (en) * | 2015-02-09 | 2016-08-09 | Warren Wessel | A downhole pump flushing system and method of use |
| CN206681711U (en) * | 2017-04-10 | 2017-11-28 | 淄博东华石油技术有限公司 | Washing well coal bed gas extraction equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2908513C (en) * | 2014-10-07 | 2017-12-05 | Pcs Ferguson, Inc. | Two-piece plunger |
-
2017
- 2017-04-10 CN CN201710228790.2A patent/CN106869867B/en active Active
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|---|---|---|---|---|
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| CN201381812Y (en) * | 2009-03-13 | 2010-01-13 | 东营市兆鑫工贸有限责任公司 | Well flushing tool |
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| CN202531405U (en) * | 2012-02-07 | 2012-11-14 | 中国石油天然气股份有限公司 | Concentric-pipe type pump for coal-bed methane |
| CN103790529A (en) * | 2014-01-21 | 2014-05-14 | 中国海洋石油总公司 | Coalbed methane drainage extraction and backwashing device and method |
| CN104329242A (en) * | 2014-09-05 | 2015-02-04 | 胜利油田北方实业集团有限责任公司 | Pipe type oil suction pump |
| CA2881498A1 (en) * | 2015-02-09 | 2016-08-09 | Warren Wessel | A downhole pump flushing system and method of use |
| CN206681711U (en) * | 2017-04-10 | 2017-11-28 | 淄博东华石油技术有限公司 | Washing well coal bed gas extraction equipment |
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| Publication number | Publication date |
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| CN106869867A (en) | 2017-06-20 |
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