CN203796238U - Novel pressure relief coal bed gas well device - Google Patents
Novel pressure relief coal bed gas well device Download PDFInfo
- Publication number
- CN203796238U CN203796238U CN201420222754.7U CN201420222754U CN203796238U CN 203796238 U CN203796238 U CN 203796238U CN 201420222754 U CN201420222754 U CN 201420222754U CN 203796238 U CN203796238 U CN 203796238U
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- CN
- China
- Prior art keywords
- wall
- rock stratum
- gas
- novel pressure
- gas well
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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.)
- Expired - Fee Related
Links
- 239000003245 coal Substances 0.000 title abstract description 23
- 239000011435 rock Substances 0.000 claims abstract description 28
- 239000004568 cement Substances 0.000 abstract description 6
- 238000005065 mining Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 5
- 230000006378 damage Effects 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 150000002843 nonmetals Chemical class 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model relates to a novel pressure relief coal bed gas well device comprising a barrel-shaped surface casing. The inner wall of the surface casing is provided with a thread, the outer wall of the surface casing is provided coarse corrugations, the outer wall of the surface casing is fixed with the well wall through the corrugations, a barrel-shaped rock stratum casing is fixed in the surface casing through the thread by means of screwing, the upper portion of the rock stratum casing is connected with one end of a gas guide pipe, the other end of the gas guide pipe is connected with a gas collection bag, a valve is arranged on the gas guide pipe, the lower portion of the rock stratum casing is screwed with the upper portion of a gas production screen pipe through the thread, and a metal mesh is disposed on the inner wall of the gas generation screen pipe. The novel pressure relief coal bed gas well device is high in integration degree, high in stability, low in cost, short in construction cycle, high in damage resistance, not easy to block and easy to recycle, has broad practicability and is suitable for being applied and used in the field of coal mining, well cementation by cement paste is not needed, the casings can be directly screwed in when lowered, and subsequent coal bed mining is unaffected.
Description
Technical field
the utility model relates to the pressure relief device that a kind of colliery is used, and especially well bore is stablized and the strong novel pressure released seam gas well of the one device of ability of resisting destruction.
Background technology
traditional pressure released seam gas well adopts three opening structures, the first perforate footpath section of drilling well is provided with surface pipe, between surface pipe and the borehole wall, fix with cement paste, the second perforate footpath section is provided with rock stratum sleeve pipe in surface pipe, between rock stratum sleeve pipe and surface pipe and the borehole wall, fix with cement paste, in the 3rd perforate footpath section, be provided with aerogenesis screen casing, aerogenesis screen casing hangs on rock stratum sleeve bottom by suspension arrangement.This traditional pressure released seam gas well in work progress, repeatedly setting of casing, repeatedly with cement slurry cementing, by suspension arrangement, aerogenesis screen casing is hung on to the program complexity, loaded down with trivial details of rock stratum sleeve bottom, cause construction drill long in time limit, cost is high.After having constructed, when working seam, overlying strata sedimentation meeting produces larger stress and distortion, and traditional pressure released seam gas well structure can not adapt to these and change, and it is disrumpent feelings therefore to produce wellhole.In the time of extraction coal bed gas, the foreign material such as ickings, landwaste are piled up in sieve aperture is inhaled into aerogenesis screen casing and gradually, stop up boring bottom, affect extracting result.In the time of the follow-up coal seam of the complete exploitation of extraction, adopt the method for beating sieve aperture on steel sleeve to make owing to being arranged in the aerogenesis screen casing of coal seam section more, once cutting coal machine and metal sleeve collision can produce spark, cause potential safety hazard.
Utility model content
in order to solve existing pressure released seam gas well device complexity and the construction period is long, cost is high problem, the utility model provides a kind of novel pressure released seam gas well device, and this pressure released seam gas well apparatus integration degree is high, stability is strong, does not need to carry out cement slurry cementing, and cost is low, while transferring sleeve pipe, can directly screw in, construction period is short, and ability of resisting destruction is strong, is difficult for stopping up, reclaim easily, do not affect follow-up seam mining, there is practicality widely, be adapted at coal mining field and promote the use of.
the utility model solves the technical scheme that its technical problem adopts: this novel pressure released seam gas well device comprises wireway, rock stratum sleeve pipe, surface pipe, wire lath, aerogenesis screen casing, valve and gas collection bag, this novel pressure released seam gas well device has the surface pipe of a tubular, the inwall of surface pipe is provided with screw thread, outer wall is provided with coarse ripple, the outer wall of surface pipe is fixed by ripple and the borehole wall, in surface pipe, spin and be fixed with the rock stratum sleeve pipe of tubular by screw thread, the inner and outer wall of rock stratum sleeve pipe is equipped with screw thread, the outer wall of rock stratum sleeve pipe is fixed by the inwall of screw thread and surface pipe, the top of rock stratum sleeve pipe is connecting one end of wireway, the other end of wireway is connecting gas collection bag, wireway is provided with valve, together with the bottom of rock stratum sleeve pipe is screwed in the top of aerogenesis screen casing by screw thread, aerogenesis screen casing inwall is furnished with wire lath, the mesh size of wire lath is 2mm × 2mm, can prevent that tiny coal petrography piece from entering aerogenesis screen casing, stop up boring, described aerogenesis screen casing is that high strength nonmetals are made.While using this gas well device, this device is inserted in the coal seam below earth's surface, Open valve, coal bed gas enters in the sleeve pipe of rock stratum by aerogenesis screen casing, then enter gas collection bag through wireway, after coal bed gas is full of gas collection bag, valve-off, take off after gas collection bag is disposed coal bed gas and can be reinstalled wireway, prepare for collect coal bed gas next time.
the beneficial effects of the utility model are, this pressure released seam gas well apparatus integration degree is high, and stability is strong, do not need to carry out cement slurry cementing, cost is low, while transferring sleeve pipe, can directly screw in, and the construction period is short, ability of resisting destruction is strong, be difficult for stopping up, reclaim easily, do not affect follow-up seam mining, there is practicality widely, be adapted at coal mining field and promote the use of.
Brief description of the drawings
below in conjunction with drawings and Examples, the utility model is described in further detail.
fig. 1 is structural principle schematic diagram of the present utility model.
in Fig. 1,1. wireway, 2. rock stratum sleeve pipe, the 3. borehole wall, 4. surface pipe, 5. wire lath, 6. aerogenesis screen casing, 7. valve, 8. gas collection bag.
Detailed description of the invention
in Fig. 1, this novel pressure released seam gas well device comprises wireway 1, rock stratum sleeve pipe 2, surface pipe 4, wire lath 5, aerogenesis screen casing 6, valve 7 and gas collection bag 8, this novel pressure released seam gas well device has the surface pipe 4 of a tubular, the inwall of surface pipe 4 is provided with screw thread, outer wall is provided with coarse ripple, the outer wall of surface pipe 4 is fixing by ripple and the borehole wall 3, in surface pipe 4, spin and be fixed with the rock stratum sleeve pipe 2 of tubular by screw thread, the inner and outer wall of rock stratum sleeve pipe 2 is equipped with screw thread, the outer wall of rock stratum sleeve pipe 2 is fixed by the inwall of screw thread and surface pipe 4, the top of rock stratum sleeve pipe 2 is connecting one end of wireway 1, the other end of wireway 1 is connecting gas collection bag 8, wireway 1 is provided with valve 7, together with the bottom of rock stratum sleeve pipe 2 is screwed in the top of aerogenesis screen casing 6 by screw thread, aerogenesis screen casing 6 inwalls are furnished with wire lath 5, the mesh size of wire lath 5 is 2mm × 2mm, can prevent that tiny coal petrography piece from entering aerogenesis screen casing 6, stop up boring, described aerogenesis screen casing 6 is made for high strength nonmetals.While using this gas well device, this device is inserted in the coal seam below earth's surface, Open valve 7, coal bed gas enters in rock stratum sleeve pipe 2 by aerogenesis screen casing 6, then enter gas collection bag 8 through wireway 1, after coal bed gas is full of gas collection bag 8, valve-off 7, take off after gas collection bag 8 is disposed coal bed gas and can be reinstalled wireway 1, prepare for collect coal bed gas next time.
Claims (3)
1.
a kind of novel pressure released seam gas well device, this novel pressure released seam gas well device comprises wireway (1), rock stratum sleeve pipe (2), surface pipe (4), wire lath (5), aerogenesis screen casing (6), valve (7) and gas collection bag (8), it is characterized in that, this novel pressure released seam gas well device has the surface pipe (4) of a tubular, the inwall of surface pipe (4) is provided with screw thread, outer wall is provided with coarse ripple, the outer wall of surface pipe (4) is fixing by ripple and the borehole wall (3), in surface pipe (4), spin and be fixed with the rock stratum sleeve pipe (2) of tubular by screw thread, the inner and outer wall of rock stratum sleeve pipe (2) is equipped with screw thread, the outer wall of rock stratum sleeve pipe (2) is fixed by the inwall of screw thread and surface pipe (4), together with the bottom of rock stratum sleeve pipe (2) is screwed in the top of aerogenesis screen casing (6) by screw thread, aerogenesis screen casing (6) inwall is furnished with wire lath (5).
2.
the novel pressure released seam gas well of one according to claim 1 device, is characterized in that, the mesh size of described wire lath (5) is 2mm × 2mm.
3.
the novel pressure released seam gas well of one according to claim 1 device, it is characterized in that, the top of described rock stratum sleeve pipe (2) is connecting one end of wireway (1), and the other end of wireway (1) is connecting gas collection bag (8), and wireway (1) is provided with valve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420222754.7U CN203796238U (en) | 2014-05-04 | 2014-05-04 | Novel pressure relief coal bed gas well device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420222754.7U CN203796238U (en) | 2014-05-04 | 2014-05-04 | Novel pressure relief coal bed gas well device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203796238U true CN203796238U (en) | 2014-08-27 |
Family
ID=51378459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420222754.7U Expired - Fee Related CN203796238U (en) | 2014-05-04 | 2014-05-04 | Novel pressure relief coal bed gas well device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203796238U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895531A (en) * | 2015-04-30 | 2015-09-09 | 山西蓝焰煤层气集团有限责任公司 | Single thick coal seam ground mining well extraction process |
-
2014
- 2014-05-04 CN CN201420222754.7U patent/CN203796238U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895531A (en) * | 2015-04-30 | 2015-09-09 | 山西蓝焰煤层气集团有限责任公司 | Single thick coal seam ground mining well extraction process |
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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: 20140827 Termination date: 20150504 |
|
| EXPY | Termination of patent right or utility model |