CN203531832U - Hole sealing device for underground hydraulic fracturing of coal mine - Google Patents
Hole sealing device for underground hydraulic fracturing of coal mine Download PDFInfo
- Publication number
- CN203531832U CN203531832U CN201320637172.0U CN201320637172U CN203531832U CN 203531832 U CN203531832 U CN 203531832U CN 201320637172 U CN201320637172 U CN 201320637172U CN 203531832 U CN203531832 U CN 203531832U
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- CN
- China
- Prior art keywords
- hole
- pipe
- pvc pipe
- sealing
- reducing pvc
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- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 61
- 239000003245 coal Substances 0.000 title claims abstract description 22
- 239000002775 capsule Substances 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims abstract description 9
- 239000007924 injection Substances 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 claims abstract description 7
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Rigid Pipes And Flexible Pipes (AREA)
Abstract
A hole sealing device for underground hydraulic fracturing of a coal mine comprises a reducing PVC pipe arranged in a drill hole, the diameter of the middle of the reducing PVC pipe is small, and the diameter of the two sides of the reducing PVC pipe is large. A hole sealing capsule which is arranged on a fracturing pipe in a sleeved mode and penetrates through the small-diameter middle of the reducing PVC pipe is arranged in the reducing PVC pipe and is provided with a hole sealing capsule water injection pipe. A blocking cement paste layer is injected between the reducing PVC pipe and the drill hole. Hole-blocking gauze winds around the head of the reducing PVC pipe. The hole sealing device is simple in structure and high in reliability, the hole sealing capsule can be recovered and repeatedly utilized, and the requirement for fast hole sealing for underground hydraulic fracturing of the coal mine can be met.
Description
Technical field
The utility model relates to coal mine down-hole drilling hole sealing device, is particularly useful for the sealing of hole of fracturing under coal mine.
Background technology
Fracturing is one of current coal mine lower area gas control major technique.By region coal body is implemented to fracturing, can increase gas permeability of coal seam, improve gas pumping rate, discharge coal-bed gas pressure, change coal properties, thereby reduce coal and gas outburst risk, reach the object that coal and gas are adopted altogether.
Good seal, high voltage bearing sealing of hole mode are the prerequisites that fracturing is implemented smoothly.Current, fracturing hole sealing technology mainly contains two kinds of cement-based material sealing of hole and hole packer sealing of holes, wherein to can bear pressure higher for cement-based material sealing of hole, but exist the sealing of hole cycle long, complex process, cost is higher, and in sealing of hole process, a large amount of steel pipes are detained in coal seam, and later stage back production leaves the shortcomings such as potential safety hazard; Hole packer sealing of hole has overcome this shortcoming well, and hole-sealing technology is comparatively simple, and sealing of hole is reliable, and hole packer can reuse.It is high that but hole packer sealing of hole requires drilling quality, directly to boring, sends into capsule, is generally difficult to deliver to assigned address; When rib is irregular, between capsule and rib, be careful hole, easily leak, and after pressure break completes, the sealing of hole of the boring that needs to consider to contain large water gaging, has increased sealing of hole difficulty.
Summary of the invention
The purpose of this utility model is the weak point overcoming in prior art, and fracturing hole sealing device under fast, the effective coal mine of a kind of simple in structure, antileaking, sealing of hole speed is provided.
This realizes above-mentioned purpose, fracturing hole sealing device under coal mine of the present utility model, comprise the reducing pvc pipe being located in boring, reducing pvc pipe middle part caliber is little, both sides caliber is large, in reducing pvc pipe, be provided with the sealing of hole capsule that is sleeved on pressure break pipe, passes reducing pvc pipe middle part pipe with small pipe diameter, sealing of hole capsule is provided with sealing of hole capsule water injection pipe, between reducing pvc pipe and boring, is marked with shutoff cement paste layer, and the head of reducing pvc pipe is wound with plug-hole gauze.
Described sealing of hole capsule external diameter is than the little 0.5 ~ 3cm of reducing pvc pipe middle part pipe with small pipe diameter; Described sealing of hole capsule water injection pipe is provided with stop valve.
Beneficial effect: the utility model can be realized quick and effective sealing of hole of fracturing under coal mine, it is not tight that combination sealing of hole mode by capsule hole and pvc pipe has overcome the sealing of hole that independent use hole packer sealing of hole exists, send into difficult shortcoming, by variable section structure, guarantee the reliability of the rear sealing of hole of capsule expansion, realize quick and effective sealing of hole of fracturing under coal mine.It is simple in structure, antileaking, and sealing of hole speed is fast, effective, and the recyclable recycling of sealing of hole capsule, has practicality widely.
Accompanying drawing explanation
Fig. 1 is fracturing hole sealing device structural representation under coal mine of the present utility model.
In figure: 1-pressure break pipe, 2-reducing pvc pipe, 3-sealing of hole capsule, 4-cement paste layer, 5-gauze, 6-sealing of hole capsule water injection pipe, 7-stop valve.
The specific embodiment
Below in conjunction with accompanying drawing, an embodiment of the present utility model is further described:
Fracturing hole sealing device under coal mine of the present utility model, mainly reducing pvc pipe 2, sealing of hole capsule 3, sealing of hole capsule water injection pipe 6, consist of, reducing pvc pipe 2 is located in boring, and reducing pvc pipe 2 middle part calibers are little, both sides caliber is large, its cross-section is divided into arc convergent cross section, as shown in drawings; In reducing pvc pipe 2, be provided with the sealing of hole capsule 3 that enters inner side Large Diameter Pipeline through reducing pvc pipe 2 middle part pipe with small pipe diameters, described sealing of hole capsule 3 external diameters are than the little 0.5 ~ 3cm of reducing pvc pipe 2 middle part pipe with small pipe diameter.Sealing of hole capsule 3 is sleeved on pressure break pipe 1, and hole capsule 3 is provided with sealing of hole capsule water injection pipe 6, and sealing of hole capsule water injection pipe 6 is provided with stop valve 7; Between described reducing pvc pipe 2 and boring, be marked with shutoff cement paste layer 4, the head of reducing pvc pipe 2 is wound with plug-hole gauze 5.During work, to the interior water filling of sealing of hole capsule 3, sealing of hole capsule 3 is expanded and block reducing pvc pipe 2 inner side Large Diameter Pipelines, while implementing pressure break in by 1 pair of boring of pressure break pipe, due to the effect of reducing pvc pipe 2 middle part pipe with small pipe diameters, wedging firmly withstands sealing of hole capsule 3.
Claims (3)
1. fracturing hole sealing device under a coal mine, it is characterized in that: it comprises the reducing pvc pipe (2) being located in boring, reducing pvc pipe (2) middle part caliber is little, both sides caliber is large, in reducing pvc pipe (2), be provided with and be sleeved on the sealing of hole capsule (3) that pressure break pipe (1) is upper, pass reducing pvc pipe (2) middle part pipe with small pipe diameter, sealing of hole capsule (3) is provided with sealing of hole capsule water injection pipe (6), between reducing pvc pipe (2) and boring, be marked with shutoff cement paste layer (4), the head of reducing pvc pipe (2) is wound with plug-hole gauze (5).
2. fracturing hole sealing device under coal mine according to claim 1, is characterized in that: described sealing of hole capsule (3) external diameter is than the little 0.5 ~ 3cm of reducing pvc pipe (2) middle part pipe with small pipe diameter.
3. fracturing hole sealing device under coal mine according to claim 1, is characterized in that: described sealing of hole capsule water injection pipe (6) is provided with stop valve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320637172.0U CN203531832U (en) | 2013-10-16 | 2013-10-16 | Hole sealing device for underground hydraulic fracturing of coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320637172.0U CN203531832U (en) | 2013-10-16 | 2013-10-16 | Hole sealing device for underground hydraulic fracturing of coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203531832U true CN203531832U (en) | 2014-04-09 |
Family
ID=50418054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320637172.0U Expired - Fee Related CN203531832U (en) | 2013-10-16 | 2013-10-16 | Hole sealing device for underground hydraulic fracturing of coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203531832U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594849A (en) * | 2014-12-05 | 2015-05-06 | 新汶矿业集团有限责任公司华丰煤矿 | Method for eliminating high ground stress |
| CN109113637A (en) * | 2018-09-20 | 2019-01-01 | 中国矿业大学 | A kind of brill downhole explosion and water filling or fracturing integrated hole packer and construction method |
| CN112145145A (en) * | 2020-10-20 | 2020-12-29 | 陕西煤业化工技术研究院有限责任公司 | Supercritical carbon dioxide sand-carrying fracturing coal bed device and method |
-
2013
- 2013-10-16 CN CN201320637172.0U patent/CN203531832U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594849A (en) * | 2014-12-05 | 2015-05-06 | 新汶矿业集团有限责任公司华丰煤矿 | Method for eliminating high ground stress |
| CN109113637A (en) * | 2018-09-20 | 2019-01-01 | 中国矿业大学 | A kind of brill downhole explosion and water filling or fracturing integrated hole packer and construction method |
| CN112145145A (en) * | 2020-10-20 | 2020-12-29 | 陕西煤业化工技术研究院有限责任公司 | Supercritical carbon dioxide sand-carrying fracturing coal bed device and method |
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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: 20140409 Termination date: 20141016 |
|
| EXPY | Termination of patent right or utility model |