CN109209300A - A kind of anti-collapse hole method for sealing of complete opening depth sieve pipe of deep fractures drilling - Google Patents
A kind of anti-collapse hole method for sealing of complete opening depth sieve pipe of deep fractures drilling Download PDFInfo
- Publication number
- CN109209300A CN109209300A CN201811073835.4A CN201811073835A CN109209300A CN 109209300 A CN109209300 A CN 109209300A CN 201811073835 A CN201811073835 A CN 201811073835A CN 109209300 A CN109209300 A CN 109209300A
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- China
- Prior art keywords
- drilling
- pipe
- drainage tube
- sieve
- sealing
- 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
- 238000005553 drilling Methods 0.000 title claims abstract description 46
- 238000007789 sealing Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000000605 extraction Methods 0.000 claims abstract description 29
- 238000007569 slipcasting Methods 0.000 claims abstract description 13
- 239000003292 glue Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 11
- 238000005065 mining Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000002775 capsule Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000007787 solid Substances 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
Landscapes
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
A kind of anti-collapse hole method for sealing of complete opening depth sieve pipe of deep fractures drilling, sequentially includes the following steps: (1) and connect one end of drainage tube with the front end of sieve pipe, sieve pipe is equipped with through-hole；(2) assembly of outer pouch, interior pouch and Grouting Pipe is constituted into hole packer on drainage tube；(3) after the completion of drilling, by with sieve pipe drainage tube along enter drilling in, to drilling carry out sealing of hole；(4) slip casting is carried out to slip casting section, completes borehole sealing.Method of the invention be normally carried out hole packer extraction under the action of borehole collapse, extraction negative pressure can, will not occur to cause slack coal to block drainage tube due to borehole collapse, moreover it is possible to effectively avoid negative pressure that from capable of wasting.
Description
Technical field
The invention belongs to mining technique field, in particular to a kind of anti-collapse hole envelope of the complete opening depth sieve pipe of deep fractures drilling
Hole method.
Background technique
Many mining areas domestic in recent years have entered the deep mining stage, and after entering deep by superficial part, geological structure becomes
Complicated, weight stress increases, and a large amount of energy of accumulation in coal and rock, non-prominent mine changes to projecting mine, so that deep coal petrography
Destruction have more impact and emergentness, deep mash gas pumping drilling is easier to collapse, therefore deep gas drainage is badly in need of change
The method for sealing of extraction borehole is to improve extracting result.
The more application of existing mash gas pumping drilling " a two stifled notes " hole packer carries out sealing of hole, and sealing of hole principle is to utilize note
Stock pump, to the slip casting section slip casting among two capsules bag and two capsules bag, completes the closure of the entire sealing section of drilling by Grouting Pipe；
Two capsules bag is all wrapped on drainage tube, carries out extraction to coal-bed gas using drainage tube.
In the deep mining stage, by " a three high disturbances " effect, the geomechanics environment of deep engineering country rock is sent out compared with superficial part
Given birth to great changes, deep fractures internal pressure increases compared with superficial part coal seam internal pressure, conversion from hard rock mine to soft rock mine,
Phenomena such as gas permeability of coal seam becomes smaller makes drilling, and there is a phenomenon where collapse holes, and due to the effect of extraction negative pressure, drainage tube is easy to occur
Blocking, will necessarily cause the decline of extraction concentration, extraction rate to be lower and extend the extraction period during extraction；Existing " two
A stifled note " hole packer sealed borehole length is distance of the drilling orifice to stress concentration region peak value, after the peak value of stress concentration region
Drilling is collapsed by the pressure inside coal seam, and the extraction negative pressure crushing of the drilling of collapsed portion during extraction is larger,
Waste negative pressure energy.
Existing sealing of hole mode cannot complete opening depth extraction length to deep fractures mash gas pumping drilling carry out complete extraction,
Especially deep fractures internal pressure increases the caused collapse hole that drills, extraction blockage, extraction concentration as caused by drilling collapse hole
Phenomena such as decline, extraction rate reduce and the pressure loss of extraction negative pressure, wastes negative pressure energy.
Summary of the invention
For existing " a two stifled notes " hole-sealing technology above problem existing for the deep mining stage, the present invention provides one kind
The anti-collapse hole method for sealing of complete opening depth sieve pipe of deep fractures drilling, through-hole is arranged on drainage tube, part drainage tube is transformed
At sieve pipe, so that it is still able to maintain channel after collapse hole unimpeded, improves extraction rate.
Method of the invention sequentially includes the following steps:
1, one end of drainage tube being connect with the front end of sieve pipe, the sieve pipe is equipped with equally distributed through-hole,
And the end of sieve pipe is equipped with end socket or plug is closed；
2, the assembly of outer pouch, interior pouch and Grouting Pipe is constituted into hole packer on drainage tube；
3, after the completion of drilling is drilled, by the drainage tube with sieve pipe along entering in drilling, sealing of hole is carried out to drilling, and is made
Sieve pipe end and the spacing of boring end are less than the spacing of extraction tube wall and the inner sidewall that drills；
4, after completing sealing of hole, slip casting is carried out by the slip casting section between the external pouch of Grouting Pipe and interior pouch, completes drilling
It blocks.
In the above method, the diameter of through-hole is 3~5mm；The gross area of whole through-holes is the 1~2 of drainage tube area of section
Times.
In the above method, after the completion of drilling, drainage tube is placed in drilling within half an hour, and the outer pouch of completion,
The assembly of interior pouch and Grouting Pipe.
In the above method, sieve pipe is structure as a whole with drainage tube or sieve pipe and drainage tube are interspersed in the same PVC
It is attached in pipe；Guan Weiyi sections of sieve, or be made of multistage；When sieve pipe is made of multistage, adjacent two sections by wearing
It is inserted in the same pvc pipe and is attached；When being attached using pvc pipe, drainage tube and sieve pipe distinguish PVC-U special glue
It is adhesively fixed together with pvc pipe.
Sieve pipe is arranged in interior pouch front end in method of the invention, and the closure of sieve pipe end can prevent from entering to bore in sieve Guan Shun
During hole, there is slack coal to enter in sieve pipe；Half an hour internal drilling after the completion of drilling is not easy to collapse, therefore within half an hour
Sealing of hole is carried out along drainage tube is entered；When drainage tube and sieve pipe occupy the space entirely to drill, even if borehole collapse, in extraction negative pressure
Under the action of extraction can also be normally carried out, will not occur due to borehole collapse and slack coal is caused to block drainage tube, moreover it is possible to is effective
Avoid negative pressure that from capable of wasting；This method can prevent slack coal after borehole collapse from generating blocking to drainage tube, and it is negative effectively to increase extraction
The transmission length of pressure improves the extraction rate of gas extraction concentration and working face, shortens the extraction period.
Detailed description of the invention
Fig. 1 is complete opening depth sieve pipe hole sealing structure schematic diagram before borehole collapse in the embodiment of the present invention；
Fig. 2 is complete opening depth sieve pipe hole sealing structure schematic diagram after borehole collapse in the embodiment of the present invention；
In figure, 1, drainage tube, 2, outer pouch, 3, interior pouch, 4, sieve pipe, 5, drilling (mine drilling), 6, sieve pipe envelope
Head, 7, Grouting Pipe, 8, slip casting section.
Specific embodiment
When drainage tube is along entering to drill in the embodiment of the present invention, guarantee that drainage tube is straight and at the uniform velocity enters drilling.
After drainage tube is along drilling is entered in the embodiment of the present invention, sieve pipe front end is less than 50mm at a distance from foot of hole.
Drilling axis is parallel to the horizontal plane in the embodiment of the present invention.
Deep fractures of the invention refer to coal seam position away from earth's surface 800m or more.
Embodiment 1
One end of drainage tube is connect with the front end of sieve pipe, the sieve pipe is equipped with equally distributed through-hole, and
And the end of sieve pipe is equipped with end socket or plug is closed；Wherein the diameter of through-hole is 3~5mm；Total face of whole through-holes
Product is 1~2 times of drainage tube area of section；
The assembly of outer pouch, interior pouch and Grouting Pipe is constituted into hole packer on drainage tube；
After the completion of drilling is drilled, drainage tube is placed in drilling within half an hour, and complete outer pouch, interior pouch and
The assembly of Grouting Pipe carries out sealing of hole to drilling, and sieve pipe end and the spacing of boring end is made to be less than extraction tube wall and bore
The spacing of hole inner sidewall；Wherein sieve pipe and drainage tube are same material integral structure；
After completing sealing of hole, slip casting is carried out by the slip casting section between the external pouch of Grouting Pipe and interior pouch, completes drilling envelope
It is stifled；It is as shown in Figure 1 to complete the complete opening depth sieve pipe hole sealing structure after blocking；Drainage tube (1) insertion drilling (5) simultaneously passes through outer pouch
(2) it is connect with interior pouch (3), drainage tube (1) front end with sieve pipe (4), sieve pipe (4) end is equipped with sieve channel closure (6), sieve
Network management end socket (6) is close to drilling (5) end；Grouting Pipe (7) passes through outer pouch (2), and front end is fixed on interior pouch (3), outer pouch
It (2) is slip casting section (8) that part of the Grouting Pipe (7) in slip casting section (8) is equipped with grouting port between interior pouch (3)；
Structure after collapsing is as shown in Figure 2；After borehole collapse, extraction can be also normally carried out under the action of extraction negative pressure,
It will not occur to cause slack coal to block drainage tube due to borehole collapse, effectively avoid negative pressure that from capable of wasting.
Embodiment 2
With embodiment 1, difference is method:
(1) gross area of whole through-holes is 1.5 times of drainage tube area of section；
(2) sieve pipe is interspersed in the same pvc pipe with drainage tube and is attached；Sieve pipe is made of multistage, and adjacent two
Section is attached by being interspersed in the same pvc pipe, and drainage tube and sieve pipe difference PVC-U special glue are Nian Jie with pvc pipe solid
It is scheduled on together.
Embodiment 3
With embodiment 1, difference is method:
(1) gross area of whole through-holes is 2 times of drainage tube area of section；
(2) sieve pipe is interspersed in the same pvc pipe with drainage tube and is attached；Guan Weiyi sections of sieve.
Claims (4)
1. a kind of anti-collapse hole method for sealing of complete opening depth sieve pipe of deep fractures drilling, it is characterised in that sequentially include the following steps:
(1) one end of drainage tube being connect with the front end of sieve pipe, the sieve pipe is equipped with equally distributed through-hole, and
The end of sieve pipe is equipped with end socket or plug is closed；
(2) assembly of outer pouch, interior pouch and Grouting Pipe is constituted into hole packer on drainage tube；
(3) after the completion of drilling is drilled, by the drainage tube with sieve pipe along entering in drilling, sealing of hole is carried out to drilling, and makes to sieve
The spacing of network management end and boring end is less than the spacing of extraction tube wall and the inner sidewall that drills；
(4) after completing sealing of hole, slip casting is carried out by the slip casting section between the external pouch of Grouting Pipe and interior pouch, completes drilling envelope
It is stifled.
2. a kind of anti-collapse hole method for sealing of complete opening depth sieve pipe of deep fractures drilling according to claim 1, feature
The diameter for being the through-hole is 3~5mm；The gross area of whole through-holes is 1~2 times of drainage tube area of section.
3. a kind of anti-collapse hole method for sealing of complete opening depth sieve pipe of deep fractures drilling according to claim 1, feature
It is in step (3) after the completion of drilling, drainage tube is placed in drilling within half an hour, and completes outer pouch, interior pouch
With the assembly of Grouting Pipe.
4. a kind of anti-collapse hole method for sealing of complete opening depth sieve pipe of deep fractures drilling according to claim 1, feature
It is that the sieve pipe is structure as a whole with drainage tube or sieve pipe is interspersed in the same pvc pipe with drainage tube and carries out
Connection；Guan Weiyi sections of sieve, or be made of multistage；When sieve pipe is made of multistage, adjacent two sections same by being interspersed in
It is attached in a pvc pipe；When being attached using pvc pipe, drainage tube and sieve pipe distinguish PVC-U special glue and pvc pipe
It is adhesively fixed together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811073835.4A CN109209300A (en) | 2018-09-14 | 2018-09-14 | A kind of anti-collapse hole method for sealing of complete opening depth sieve pipe of deep fractures drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811073835.4A CN109209300A (en) | 2018-09-14 | 2018-09-14 | A kind of anti-collapse hole method for sealing of complete opening depth sieve pipe of deep fractures drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109209300A true CN109209300A (en) | 2019-01-15 |
Family
ID=64984382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811073835.4A Pending CN109209300A (en) | 2018-09-14 | 2018-09-14 | A kind of anti-collapse hole method for sealing of complete opening depth sieve pipe of deep fractures drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109209300A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778332A (en) * | 2019-10-16 | 2020-02-11 | 山东大学 | Reducing self-adaptive expansion grouting device for cracked and damaged part of secondary lining of tunnel and reinforcing method |
| CN114136267A (en) * | 2021-11-15 | 2022-03-04 | 天津大学 | Measurement and control integrated soil deformation dynamic control system based on composite capsule |
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|---|---|---|---|---|
| US4998848A (en) * | 1989-03-27 | 1991-03-12 | R. G. Hansen & Associates | Method and apparatus for removing ground contaminants |
| CN101482026A (en) * | 2009-02-10 | 2009-07-15 | 河南理工大学 | Gas extraction secondary high-pressure slip-casting hole-sealing apparatus and its hole-sealing method |
| CN103195471A (en) * | 2013-04-22 | 2013-07-10 | 中国矿业大学 | Method for preventing drilling collapse of downhole coal bed |
| CN203905916U (en) * | 2014-06-23 | 2014-10-29 | 河南理工大学 | Spherical screen pipe |
| CN105114030A (en) * | 2015-08-20 | 2015-12-02 | 中国矿业大学 | Gas extraction drilling non-solidification constant-pressure slurry hole sealing method |
| CN205314961U (en) * | 2016-01-19 | 2016-06-15 | 河南工程学院 | Quick hole sealing device of adopting drilling is taken out in soft coal seam |
| CN106050297A (en) * | 2016-06-28 | 2016-10-26 | 淮南矿业(集团)有限责任公司 | Point injection type hole sealing method and device |
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2018
- 2018-09-14 CN CN201811073835.4A patent/CN109209300A/en active Pending
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| US4998848A (en) * | 1989-03-27 | 1991-03-12 | R. G. Hansen & Associates | Method and apparatus for removing ground contaminants |
| CN101482026A (en) * | 2009-02-10 | 2009-07-15 | 河南理工大学 | Gas extraction secondary high-pressure slip-casting hole-sealing apparatus and its hole-sealing method |
| CN103195471A (en) * | 2013-04-22 | 2013-07-10 | 中国矿业大学 | Method for preventing drilling collapse of downhole coal bed |
| CN203905916U (en) * | 2014-06-23 | 2014-10-29 | 河南理工大学 | Spherical screen pipe |
| CN105114030A (en) * | 2015-08-20 | 2015-12-02 | 中国矿业大学 | Gas extraction drilling non-solidification constant-pressure slurry hole sealing method |
| CN205314961U (en) * | 2016-01-19 | 2016-06-15 | 河南工程学院 | Quick hole sealing device of adopting drilling is taken out in soft coal seam |
| CN106050297A (en) * | 2016-06-28 | 2016-10-26 | 淮南矿业(集团)有限责任公司 | Point injection type hole sealing method and device |
| CN106869989A (en) * | 2017-02-23 | 2017-06-20 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of underground coal mine continuous screen manages and protects hole method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778332A (en) * | 2019-10-16 | 2020-02-11 | 山东大学 | Reducing self-adaptive expansion grouting device for cracked and damaged part of secondary lining of tunnel and reinforcing method |
| CN114136267A (en) * | 2021-11-15 | 2022-03-04 | 天津大学 | Measurement and control integrated soil deformation dynamic control system based on composite capsule |
| CN114136267B (en) * | 2021-11-15 | 2022-09-02 | 天津大学 | Measurement and control integrated soil deformation dynamic control system based on composite capsule |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190115 |
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| RJ01 | Rejection of invention patent application after publication |