CN207048739U - A kind of low gaseous mine gas ground extraction technology drilled well bore structure - Google Patents
A kind of low gaseous mine gas ground extraction technology drilled well bore structure Download PDFInfo
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- CN207048739U CN207048739U CN201720940023.XU CN201720940023U CN207048739U CN 207048739 U CN207048739 U CN 207048739U CN 201720940023 U CN201720940023 U CN 201720940023U CN 207048739 U CN207048739 U CN 207048739U
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Abstract
The utility model belongs to mine gas processing technology field, specifically a kind of low gaseous mine gas ground extraction technology drilled well bore structure.Solve to adopt in well group work progress and run into goaf, water-bearing layer, the situation on the stratum of Complicated Geologic Condition, the problem of to ensure pore-forming, spudded in hole including one, two spud in hole, three, which spud in, hole and four spuds in hole, one spuds in hole by 20m opening positions below ground to basement rock, one, which spuds in, sets surface pipe I in hole, one spuds in the full well cement sealing of hole the week side of boss, two Kong Youyi that spud in open foot of hole to the following opening position in goaf, two, which spud in, sets surface pipe II in hole, two spud in the full well cement sealing of hole the week side of boss, foot of hole is opened to the following opening position in geological structure complexity layer position by two in three holes of spudding in, three, which spud in, sets surface pipe III in hole, three spud in the full well cement sealing of hole the week side of boss, four Kong Yousan that spud in are opened under foot of hole to coal seam.The utility model is suitable to improve one-tenth porosity, and then promotes Safety of Coal Mine Production, improves pit coal production efficiency.
Description
Technical field
The utility model belongs to mine gas processing technology field, specifically a kind of low gaseous mine gas ground extraction skill
Art drilled well bore structure.
Background technology
Low gaseous mine high-productivity faces gas ground extraction technology, using ground drilling technology, well is adopted in formation
Group and the crack communication that is formed of mining, using ground moving pumping plant negative pressure extraction, while extraction goaf gas.Well group is adopted to apply
Goaf, water-bearing layer, the stratum etc. of Complicated Geologic Condition are run into during work, adopting the casing programme of well group just needs to be become
More, to ensure pore-forming.Coal develops correlation technique with coal bed gas Gong Cai National Key Laboratories.
The content of the invention
The utility model runs into goaf, water-bearing layer, Complicated Geologic Condition to solve to adopt in well group work progress
A kind of situation on stratum, the problem of to ensure pore-forming, there is provided low gaseous mine gas ground extraction technology drilled well bore structure.
The utility model takes following technical scheme：A kind of low gaseous mine gas ground extraction technology drilled well bore knot
Structure, including one spud in hole, two spud in hole, three spud in and hole and four spud in hole, one spuds in hole by 20m positions below ground to basement rock
Place, one spuds in setting surface pipe I in hole, and one spuds in the full well cement sealing of hole the week side of boss, and two Kong Youyi that spud in open foot of hole extremely
The following opening position in goaf, two, which spud in, sets surface pipe II in hole, and two spud in the full well cement sealing of hole the week side of boss, three spud in hole by
Two open foot of hole to the following opening position in geological structure complexity layer position, and three, which spud in, sets surface pipe III in hole, and three spud in hole week
The full well cement sealing in side, four Kong Yousan that spud in open 5m opening positions under foot of hole to coal seam.
Compared with prior art, the utility model gives full play to the flexibility for adopting well casing programme, adapts to various complexity
Stratum, improve one-tenth porosity, and then promote Safety of Coal Mine Production, improve pit coal production efficiency.With following four beneficial effect：
1) goaf is passed through, gas in extraction the following group coal；
2) loose aquifer is passed through, prevents well internal water accumulation；
3) through intricately interval is constructed, setting of casing well cementing of cement, reach retaining wall, prevent collapsing and breaking in well, so that
Fill wellhole；
4) interval of interest is closed on, using barefoot completion, ensures that drilling well is preferably connected with the fissure zone formed of mining, improves
Extraction efficiency.
The utility model effectively increases the applicability of low gaseous mine high-productivity faces gas ground extraction technology,
Ensure that one-tenth porosity, smooth engineering construction are carried out, it is ensured that mine gas extraction system normal operation, escort for safety in production.
Brief description of the drawings
Fig. 1 is the utility model structure diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
A kind of low gaseous mine gas ground extraction technology drilled well bore structure, including a hole 1, two of spudding in are spudded in hole 2, three
Hole 3 and four of spudding in is spudded in hole 4, and one spuds in hole 1 by 20m opening positions below ground to basement rock, and one, which spuds in, sets top layer to cover in hole 1
Pipe I, one spuds in the full well cement sealing of the week side of boss of hole 1, and foot of hole is opened to goaf opening position below 5 in two holes 2 of spudding in by one, and two open
Surface pipe II are set in drilling 2, and two are spudded in the full well cement sealing of the week side of boss of hole 2, and three holes 3 of spudding in are spudded in the bottom of hole 2 to ground by two
Texture makes complicated layer opening position below 6, and three, which spud in, sets surface pipe III in hole 3, and three spud in the full well cement sealing of the week side of boss of hole 3,
Spudded in the 5m opening positions of the bottom of hole 3 to coal seam 7 times by three in four holes 4 of spudding in.
Specific construction step is as follows：
1）One hole of spudding in uses Φ 480mm drill bits, creeps into 20m below basement rock, lower Φ 377.7mm surface pipes I, Quan Jing
Cement sealing；
2）Two holes of spudding in use Φ 311.1mm drill bits, pass through goaf, lower Φ 244.5mm surface pipes II, full well cement
Sealing；
3）Three holes of spudding in use Φ 215.9mm drill bits, through loose aquifer, geological structure complexity layer, accomplish leakproof, anti-
Collapse, tripping in Φ 139.7mm surface pipes III, full well cement sealing；
4）Four holes of spudding in use Φ 114mm drill bits, are drilled into 5m barefoot completions under coal seam.
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art,
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacing, within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., this should be included in
Within the protection domain of invention.
Claims (1)
- A kind of 1. low gaseous mine gas ground extraction technology drilled well bore structure, it is characterised in that：Spudded in hole including one（1）、 Two spud in hole（2）, three spud in hole（3）And four spud in hole（4）, one spuds in hole（1）By 20m opening positions below ground to basement rock, One spuds in hole（1）Interior setting surface pipe I, one spuds in hole（1）The full well cement sealing of the week side of boss, two spud in hole（2）Spudded in hole by one Bottom to goaf（5）Following opening position, two spud in hole（2）Interior setting surface pipe II, two spud in hole（2）The full well cement of the week side of boss Sealing, three spud in hole（3）Spudded in hole by two（2）Bottom is to geological structure complexity layer（6）Following opening position, three spud in hole（3）It is interior Surface pipe III is set, and three spud in hole（3）The full well cement sealing of the week side of boss, four spud in hole（4）Spudded in hole by three（3）Bottom is to coal Layer（7）Lower 5m opening positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720940023.XU CN207048739U (en) | 2017-07-31 | 2017-07-31 | A kind of low gaseous mine gas ground extraction technology drilled well bore structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720940023.XU CN207048739U (en) | 2017-07-31 | 2017-07-31 | A kind of low gaseous mine gas ground extraction technology drilled well bore structure |
Publications (1)
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| CN207048739U true CN207048739U (en) | 2018-02-27 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057795A (en) * | 2018-08-29 | 2018-12-21 | 山西晋城无烟煤矿业集团有限责任公司 | It is a kind of to cross goaf coal bed gas ground drilling method |
| CN109139094A (en) * | 2018-10-26 | 2019-01-04 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of roller ground gas pumping method |
| CN110318706A (en) * | 2019-07-15 | 2019-10-11 | 神华神东煤炭集团有限责任公司 | A kind of method that drilling operation crosses goaf |
| CN110939408A (en) * | 2018-09-25 | 2020-03-31 | 山西省煤炭地质勘查研究院 | Optimized goaf coalbed methane ground extraction well body structure and well cementation method |
| CN110939407A (en) * | 2018-09-25 | 2020-03-31 | 山西省煤炭地质勘查研究院 | Double-deck overlapping goaf ground drainage well structure and recovery unit |
| CN111021959A (en) * | 2019-12-20 | 2020-04-17 | 山西蓝焰煤层气集团有限责任公司 | Well drilling method for preventing water accumulation in goaf |
| CN111335936A (en) * | 2020-03-20 | 2020-06-26 | 淮南矿业(集团)有限责任公司 | Construction method of ground fire prevention and extinguishing channel of goaf target area |
| CN114294046A (en) * | 2021-12-31 | 2022-04-08 | 山西晋煤集团技术研究院有限责任公司 | Up-down three-dimensional extraction method for full-coverage well in coal mine area |
-
2017
- 2017-07-31 CN CN201720940023.XU patent/CN207048739U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057795A (en) * | 2018-08-29 | 2018-12-21 | 山西晋城无烟煤矿业集团有限责任公司 | It is a kind of to cross goaf coal bed gas ground drilling method |
| CN110939408A (en) * | 2018-09-25 | 2020-03-31 | 山西省煤炭地质勘查研究院 | Optimized goaf coalbed methane ground extraction well body structure and well cementation method |
| CN110939407A (en) * | 2018-09-25 | 2020-03-31 | 山西省煤炭地质勘查研究院 | Double-deck overlapping goaf ground drainage well structure and recovery unit |
| CN109139094A (en) * | 2018-10-26 | 2019-01-04 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of roller ground gas pumping method |
| CN110318706A (en) * | 2019-07-15 | 2019-10-11 | 神华神东煤炭集团有限责任公司 | A kind of method that drilling operation crosses goaf |
| CN110318706B (en) * | 2019-07-15 | 2021-06-04 | 神华神东煤炭集团有限责任公司 | Method for drilling construction to pass through goaf |
| CN111021959A (en) * | 2019-12-20 | 2020-04-17 | 山西蓝焰煤层气集团有限责任公司 | Well drilling method for preventing water accumulation in goaf |
| CN111335936A (en) * | 2020-03-20 | 2020-06-26 | 淮南矿业(集团)有限责任公司 | Construction method of ground fire prevention and extinguishing channel of goaf target area |
| CN114294046A (en) * | 2021-12-31 | 2022-04-08 | 山西晋煤集团技术研究院有限责任公司 | Up-down three-dimensional extraction method for full-coverage well in coal mine area |
| CN114294046B (en) * | 2021-12-31 | 2024-01-26 | 山西晋煤集团技术研究院有限责任公司 | Coal mine area full-coverage underground three-dimensional extraction method |
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