CN110056319A - A kind of coal bed gas well does not stop well preforation tunnel dredger - Google Patents
A kind of coal bed gas well does not stop well preforation tunnel dredger Download PDFInfo
- Publication number
- CN110056319A CN110056319A CN201910331426.8A CN201910331426A CN110056319A CN 110056319 A CN110056319 A CN 110056319A CN 201910331426 A CN201910331426 A CN 201910331426A CN 110056319 A CN110056319 A CN 110056319A
- Authority
- CN
- China
- Prior art keywords
- spray head
- water storehouse
- high pressure
- preforation tunnel
- bed gas
- Prior art date
- 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.)
- Pending
Links
- 239000003245 coal Substances 0.000 title claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000007921 spray Substances 0.000 claims abstract description 47
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 210000002445 nipple Anatomy 0.000 claims abstract description 12
- 238000003860 storage Methods 0.000 claims description 4
- 240000007594 Oryza sativa Species 0.000 claims 1
- 235000007164 Oryza sativa Nutrition 0.000 claims 1
- 235000009566 rice Nutrition 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 238000011010 flushing procedure Methods 0.000 abstract description 7
- 238000005406 washing Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 44
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 8
- 238000005065 mining Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 4
- 238000004220 aggregation Methods 0.000 description 4
- 239000002817 coal dust Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses a kind of coal bed gas wells not to stop well preforation tunnel dredger, including sucker rod, oil pipe, casing, high pressure water injection pipe, rubber gasket, horizontal spray head, nipple, multi-angle showerhead, location nut, plunger, travelling valve, pump barrel, standing valve, cementing concrete layer, positioning bolt, coal seam reservoirs, preforation tunnel, sliding bearing bush, water storehouse, rotation forces spray head, fastening bolt, fastening nut, described device passes through the positioning bolt by the sliding bearing bush and the oil pipe, the location nut and rubber gasket connection, the water storehouse is connect with the sliding bearing bush, the water storehouse and the horizontal spray head, the multi-angle showerhead, the rotation forces spray head is threadedly coupled by the nipple, the water storehouse passes through the fastening bolt, the fastening nut connection, the high pressure injection Water pipe is connect with the water storehouse, and the present invention is big using multi-angle rotary spray head flushing area, and high pressure washing effect is good, and interchangeability is strong.
Description
Technical field
The present invention relates to a kind of coal bed gas wells, and desilting equipment component, more particularly to a kind of coal bed gas well to be assisted not to stop well
Preforation tunnel dredger.
Background technique
Coal bed gas is one of the important unconventional petroleum resources of current China's exploitation.The exploitation of coal bed gas not only can be state
Family provides clean energy resource, alleviates the situation of China's clean energy resource anxiety, and can reduce coal mine gas explosion, reduces greenhouse gas
Body discharge.
The geological conditions of China's cbm development is extremely complex, and coal seam reservoirs are more crisp, is also easy to produce coal dust, coal tar, coal bed gas well
The migration pathway that coal bed gas and free coal dust are formed after completion perforating, by the long-term mining period, coal dust water flooding, chlorine from
It is cementing under the material effects such as son, deposition be detained, be attached at preforation tunnel and on shaft in wall, cause produce gas channel blocking,
It the problems such as rod tube increased friction, even results in and does not produce gas, seriously affected the continuous-stable mining of coal bed gas, caused great economy
Loss.The problems such as being directed to the blocking of coal bed gas preforation tunnel at present is mainly proposed down-hole string again using halt production sessions
Lower entering glue pipe carries out water filling flushing, and sebific duct rinses angle and area coverage is smaller, and flushing effect is poor, can not effectively dredge coal
Layer gas well preforation tunnel and the coal slime coal glue etc. of shaft in wall attachment stick aggregation, and stop well operations and seriously affected coal bed gas
Gas production even results in and does not produce gas, causes serious economic loss.
It still may be implemented at present without a kind of effective device in dredging and the pit shaft for not stopping well coal bed gas well preforation tunnel
Inner wall sticks the cleaning of aggregation, causes biggish obstruction to coal bed gas well steady and continuous mining, has seriously affected coal bed gas
Continuous mining and output economic benefit.
Summary of the invention
The object of the invention is that providing a kind of coal bed gas well to solve the above-mentioned problems does not stop well preforation tunnel
Dredger.
The present invention through the following technical solutions to achieve the above objectives:
The present invention includes sucker rod, oil pipe, casing, high pressure water injection pipe, rubber gasket, horizontal spray head, nipple, polygonal
Spend spray head, location nut, plunger, travelling valve, pump barrel, standing valve, cementing concrete layer, positioning bolt, coal seam reservoirs, Perforation
Eye, sliding bearing bush, water storehouse, rotation forces spray head, fastening bolt, fastening nut, described device is by the sliding bearing bush and institute
It states oil pipe to connect by the positioning bolt, the location nut and the rubber gasket, the water storehouse and the sliding axle
Watt connection, the water storehouse connect with the horizontal spray head, the multi-angle showerhead, the rotation forces spray head by the screw thread
Head thread connection, the water storehouse are connected by the fastening bolt, the fastening nut, the high pressure water injection pipe and the storage
Sump connection.
Specifically, the water storehouse includes high pressure water injection mouth, nipple, fastening bolt and fastening nut.
The beneficial effects of the present invention are:
The present invention is that a kind of coal bed gas well does not stop well preforation tunnel dredger, at present still can without a kind of effective device
Stick the cleaning of aggregation, coal dust, coal glue and coal in the dredging and shaft in wall for not stopping well coal bed gas well preforation tunnel to realize
Mud etc. sticks aggregation and blocks production gas channel and rod tube friction etc. one in the blocking of preforation tunnel and shaft in wall, viscous will lead to
Series of problems, the present invention are injected into water storehouse as high voltage power source by high pressure water injection pipe using ground high pressure water injection equipment,
Driving rotation promotes spray head high speed injection water jet to carry out rotary motion with driving device, forms the clean range of large area, high
Pressure water projects through horizontal spray head and multi-angle showerhead high speed and carries out dredging cleaning to preforation tunnel and shaft in wall attachment coal slime etc.,
Rotation promote spray head high speed injection can driving device rotation, formed all standing of annular region area, solve and rinsed using sebific duct
The problem of area limits, and high pressure water is ejected through spray head high speed with biggish impact force, flushing effect is preferable, significantly changes
It has been apt to the dredging effect of preforation tunnel, horizontal spray head, multi-angle showerhead and rotation propulsion spray head use the universal standard part of variable diameter,
Cost is reduced, while outfit can be selected according to technical parameters such as hole condition Perforation Density and apertures, interchangeability is good, in normal mining
Stage can complete dredging cleaning, and realization does not stop well work, avoids because gas production die-offs even caused by stopping well operations
The problems such as not producing gas, coal bed gas well produce the dredging in gas channel, gas production have been significantly increased, has substantially increased coal-bed gas exploitation
Benefit.
Detailed description of the invention
Attached drawing: Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the structural schematic diagram of water storehouse assembly spray head of the present invention；
In figure: 1. sucker rods, 2. oil pipes, 3. casings, 4. high pressure water injection pipes, 5. rubber gaskets, 6. horizontal spray heads, 7. screw threads
Connector, 8. multi-angle showerheads, 9. location nuts, 10. plungers, 11. travelling valves, 12. pump barrels, 13. standing valves, 14. well cementation
Cement layer, 15. positioning bolts, 16. coal seam reservoirs, 17. preforation tunnels, 18. sliding bearing bushes, 19. water storehouses, the spray of 20. rotation forces
Head, 21. fastening bolts, 22. fastening nuts.
Specific embodiment
The invention will be further described with example with reference to the accompanying drawing:
As shown in Figure 1 to Figure 2: the present invention includes sucker rod 1, oil pipe 2, casing 3, high pressure water injection pipe 4, rubber gasket 5, water
Flat spray head 6, nipple 7, multi-angle showerhead 8, location nut 9, plunger 10, travelling valve 11, pump barrel 12, standing valve 13,
Cementing concrete layer 14, positioning bolt 15, coal seam reservoirs 16, preforation tunnel 17, sliding bearing bush 18, water storehouse 19, rotation forces spray head
20, fastening bolt 21, fastening nut 22, described device pass through the positioning bolt with the oil pipe 2 by the sliding bearing bush 18
14, the location nut 9 and the rubber gasket 5 connection, the water storehouse 19 are connect with the sliding bearing bush 18, the water storage
Storehouse 19 and the horizontal spray head 6, the multi-angle showerhead 8, the rotation forces spray head 20 are connected by 7 screw thread of nipple
It connects, the water storehouse 18 is connected by the fastening bolt 21, the fastening nut 22, the high pressure water injection pipe 4 and the storage
Sump 18 connects.
Specifically, the water storehouse 18 includes high pressure water injection mouth, nipple 7, fastening bolt 21 and fastening nut 22.
Preferably, a kind of coal bed gas well does not stop well preforation tunnel dredger, it is characterised in that: high using ground
Pressure injection wetting system is injected into water storehouse 18 by high pressure water injection pipe 4 and is used as high voltage power source, and driving rotation promotes spray head high speed to spray
Jetting jet stream carries out rotary motion with driving device, forms the clean range of large area, high pressure water is through horizontal spray head 6 and multi-angle
Spray head 8, which projects at a high speed, carries out dredging cleaning to preforation tunnel and shaft in wall attachment coal slime etc., and rotation promotes spray head 20 to spray at a high speed
Penetrate can driving device rotation, form all standing of annular region area, solve the problems, such as that rinsing area using sebific duct limits, and high
Pressure water is ejected through spray head high speed with biggish impact force, and flushing effect is preferable, significantly improves the dredging of preforation tunnel
Effect, horizontal spray head, multi-angle showerhead and rotation promote spray head to use the universal standard part of variable diameter, reduce cost, while can root
Outfit is selected according to technical parameters such as hole condition Perforation Density and apertures, interchangeability is good, can complete to dredge in the normal mining stage
Cleaning, realization do not stop well work, avoid because the problems such as gas production die-offs or even do not produce gas caused by stopping well operations, coal seam
Gas well produces the dredging in gas channel, and gas production has been significantly increased, has substantially increased coal-bed gas exploitation benefit.
The present invention is directed to propose a kind of coal bed gas well does not stop well preforation tunnel dredger.
One kind of the present invention does not stop well dredger, including sucker rod, oil pipe, casing, high pressure water injection pipe, Rubber washer
Piece, horizontal spray head, nipple, multi-angle showerhead, location nut, plunger, travelling valve, pump barrel, standing valve, cementing concrete
Layer, positioning bolt, coal seam reservoirs, preforation tunnel, sliding bearing bush, water storehouse, rotation forces spray head, fastening bolt, fastening nut,
Middle water storehouse includes high pressure water injection mouth, nipple, fastening bolt and fastening nut.
The present invention devises a kind of completely new by careful research and discussion, does not stop well perforation applied to coal bed gas well
Eyelet dredger is injected into water storehouse as high voltage power source by high pressure water injection pipe using ground high pressure water injection equipment, drives
Dynamic rotation promotes spray head high speed injection water jet to carry out rotary motion with driving device, forms the clean range of large area, high pressure
Water projects through horizontal spray head and multi-angle showerhead high speed and carries out dredging cleaning to preforation tunnel and shaft in wall attachment coal slime etc., revolves
Turn promote spray head high speed injection can driving device rotation, formed all standing of annular region area, solve using sebific duct flushing surface
The problem of product limitation, and high pressure water is ejected through spray head high speed with biggish impact force, flushing effect is preferable, significantly improves
The dredging effect of preforation tunnel, horizontal spray head, multi-angle showerhead and rotation promote spray head to use the universal standard part of variable diameter, drop
Low cost, while outfit can be selected according to technical parameters such as hole condition Perforation Density and apertures, interchangeability is good, in normal mining rank
Section can complete dredging cleaning, and realization does not stop well work, avoid because gas production die-offs even not caused by stopping well operations
The problems such as producing gas, coal bed gas well produce the dredging in gas channel, gas production have been significantly increased, and substantially increase coal-bed gas exploitation effect
Benefit.
Basic principles and main features and advantages of the present invention of the invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (3)
1. a kind of coal bed gas well does not stop well preforation tunnel dredger, it is characterised in that: including sucker rod, oil pipe, casing, high pressure
Water injection pipe, rubber gasket, horizontal spray head, nipple, multi-angle showerhead, location nut, plunger, travelling valve, pump barrel, fixation
Valve, cementing concrete layer, positioning bolt, coal seam reservoirs, preforation tunnel, sliding bearing bush, water storehouse, rotation forces spray head, fastening spiral shell
Bolt, fastening nut, described device pass through the positioning bolt, the location nut and institute by the sliding bearing bush and the oil pipe
The connection of rubber gasket is stated, the water storehouse connect with the sliding bearing bush, the water storehouse and the horizontal spray head, described polygonal
Degree spray head, the rotation forces spray head are threadedly coupled by the nipple, and the water storehouse passes through the fastening bolt, institute
Fastening nut connection is stated, the high pressure water injection pipe is connect with the water storehouse.
2. coal bed gas well according to claim 1 does not stop well preforation tunnel dredger, it is characterised in that: the water storage
Storehouse includes high pressure water injection mouth, nipple, fastening bolt and fastening nut.
3. coal bed gas well according to claim 1 does not stop well preforation tunnel dredger, it is characterised in that: according to Perforation
When the close hole 29-36/rice, the technical parameter of aperture 5-31mm, the horizontal spray head, multi-angle showerhead and rotation forces spray head are pressed
According to every 60 degree one group of water storehouse outer circumference surface, successively spiral is uniformly installed up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910331426.8A CN110056319A (en) | 2019-04-24 | 2019-04-24 | A kind of coal bed gas well does not stop well preforation tunnel dredger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910331426.8A CN110056319A (en) | 2019-04-24 | 2019-04-24 | A kind of coal bed gas well does not stop well preforation tunnel dredger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110056319A true CN110056319A (en) | 2019-07-26 |
Family
ID=67320258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910331426.8A Pending CN110056319A (en) | 2019-04-24 | 2019-04-24 | A kind of coal bed gas well does not stop well preforation tunnel dredger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110056319A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821425A (en) * | 2019-12-31 | 2020-02-21 | 中国石油大学(华东) | Coal-bed gas well wall cleaning equipment and circulating well cleaning method |
| CN111206909A (en) * | 2020-01-15 | 2020-05-29 | 闫大丰 | Hydraulic jet staged fracturing tool |
| CN113216914A (en) * | 2021-06-09 | 2021-08-06 | 门万龙 | Layered injection allocation device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5060725A (en) * | 1989-12-20 | 1991-10-29 | Chevron Research & Technology Company | High pressure well perforation cleaning |
| CN1401879A (en) * | 2002-09-13 | 2003-03-12 | 中国石化胜利油田有限公司采油工艺研究院 | Hydro-impact broken down method and device for oil-water well |
| CN101718178A (en) * | 2009-12-09 | 2010-06-02 | 中国石油天然气股份有限公司 | Method for continuously washing coal ash under coal bed methane well in bride type without causing pollution |
| 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 |
| CN203742495U (en) * | 2014-03-14 | 2014-07-30 | 中国海洋石油总公司 | High-pressure rotary washing tool |
| CN205297401U (en) * | 2015-12-16 | 2016-06-08 | 常州凯锐能源科技有限公司 | Intelligence well washing device |
| CN106499382A (en) * | 2014-10-24 | 2017-03-15 | 中国石油大学(华东) | A kind of oil field perforation detection and cleaning method |
| CN207111014U (en) * | 2017-08-25 | 2018-03-16 | 北京地矿工程建设有限责任公司 | A kind of well washing equipment |
| CN207332794U (en) * | 2017-09-12 | 2018-05-08 | 中国石油天然气股份有限公司 | A kind of well-flushing instrument |
| CN108071376A (en) * | 2016-11-17 | 2018-05-25 | 中国石油天然气股份有限公司 | A kind of injection-production column jacket in coal bed gas well |
-
2019
- 2019-04-24 CN CN201910331426.8A patent/CN110056319A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5060725A (en) * | 1989-12-20 | 1991-10-29 | Chevron Research & Technology Company | High pressure well perforation cleaning |
| CN1401879A (en) * | 2002-09-13 | 2003-03-12 | 中国石化胜利油田有限公司采油工艺研究院 | Hydro-impact broken down method and device for oil-water well |
| CN101718178A (en) * | 2009-12-09 | 2010-06-02 | 中国石油天然气股份有限公司 | Method for continuously washing coal ash under coal bed methane well in bride type without causing pollution |
| 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 |
| CN203742495U (en) * | 2014-03-14 | 2014-07-30 | 中国海洋石油总公司 | High-pressure rotary washing tool |
| CN106499382A (en) * | 2014-10-24 | 2017-03-15 | 中国石油大学(华东) | A kind of oil field perforation detection and cleaning method |
| CN205297401U (en) * | 2015-12-16 | 2016-06-08 | 常州凯锐能源科技有限公司 | Intelligence well washing device |
| CN108071376A (en) * | 2016-11-17 | 2018-05-25 | 中国石油天然气股份有限公司 | A kind of injection-production column jacket in coal bed gas well |
| CN207111014U (en) * | 2017-08-25 | 2018-03-16 | 北京地矿工程建设有限责任公司 | A kind of well washing equipment |
| CN207332794U (en) * | 2017-09-12 | 2018-05-08 | 中国石油天然气股份有限公司 | A kind of well-flushing instrument |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821425A (en) * | 2019-12-31 | 2020-02-21 | 中国石油大学(华东) | Coal-bed gas well wall cleaning equipment and circulating well cleaning method |
| CN111206909A (en) * | 2020-01-15 | 2020-05-29 | 闫大丰 | Hydraulic jet staged fracturing tool |
| CN113216914A (en) * | 2021-06-09 | 2021-08-06 | 门万龙 | Layered injection allocation device |
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