CN205477511U - Prevent releasing hydraulic fracturing hole sealing device - Google Patents
Prevent releasing hydraulic fracturing hole sealing device Download PDFInfo
- Publication number
- CN205477511U CN205477511U CN201620048223.XU CN201620048223U CN205477511U CN 205477511 U CN205477511 U CN 205477511U CN 201620048223 U CN201620048223 U CN 201620048223U CN 205477511 U CN205477511 U CN 205477511U
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- hole
- capsule
- sealing
- hole sealing
- fracturing
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Abstract
The utility model discloses a mining prevent releasing hydraulic fracturing hole sealing device, the hole sealing capsule, check valve, the end cap that set gradually on the fracturing pipe, the fracturing pipe is big from the middle part diameter, and the bulging tripe shape hole sealing capsule center that the both ends diameter is little is passed, and the fracturing pipe is glued intracapsular part at the hole sealing and is provided with the apopore. This hole sealing device can effectively prevent the hydraulic fracturing in -process and release drilling because injection pressure is too big with the hole sealing capsule, causes the drawback of fracturing failure, compare with conventional water conservancy hole sealing capsule, but this hole sealing device and big, the sealed effectual reuse of drilling area of contact, simple structure, safe and reliable.
Description
Technical field
This utility model relates to the technical field of underground fracture drilling and sealing, is specifically related to one and utilizes sealing of hole capsule " bulge " section to embed bore expanded hole section after expanding thus increase the adhesive force of capsule and boring, improve sealing effectiveness, prevent capsule to be pushed out the technical field of boring.
Background technology
Pre-mining drainage coal-bed gas, as the mainly means of solution coal mine gas problem, is constantly subjected to the attention of coal-mining technique personnel.According to statistics, the coal seam of the highly gassy mine of China more than 95% and projecting mine exploitation belongs to low air permeability coal seam, causes gas pumping work the embarrassment of " having gas can not take out " often occur.From the sixties in last century, hydraulic fracturing technology has been applied since the weak seam anti-reflection enhanced gas extraction gas field of low-permeable at First National by Shenyang academy, and technical know-how research and the equipment research and development of fracturing all achieve huge progress.
The hole sealing technology of the boring of fracturing at present specifically includes that cement mortar or chemical grout sealing of hole and three kinds of modes of hole packer sealing of hole.Cement mortar method for sealing there will be crack after there is problems of cement consolidation, forms leakage path thus affects sealing effectiveness；The sealing of hole limited strength of the chemical grout method of pore sealing of such as polyurethanes, expansion rate is wayward, easily departs from the wall of a borehole because of contraction, the phenomenon leaked air after slurry dilatancy consolidation.These two kinds of method for sealing techniques are loaded down with trivial details and can not reuse, and are primarily adapted for use in permanent sealing of hole place.Hole packer sealing of hole can be divided into friction-type and hydraulic expansion type two class by its sealing of hole principle.Field practice application shows, friction-type hole packer is the heaviest, and the coefficient of expansion is less, and sealing of hole effect is undesirable.Therefore, underground coal mine fracturing hole packer typically uses the hydraulic expansion type sealing of hole mode of repeatable utilization.It is cylinder that general hole packer sets rear mid portion, by length limitation, capsule is limited with the contact area of boring, the frictional force of the capsule after expansion and the wall of a borehole less than fracturing fluid to capsule along the thrust of borehole axial time, when fracturing pump feed flow, sealing of hole capsule may be released boring by the wriggling of fracturing string, water under high pressure in capsule constitutes bigger threat to the safety of workmen around, therefore, a kind of being possible to prevent because the hole packer that boring released by sealing of hole capsule is seemed the most necessary by string creep is researched and developed.
Summary of the invention
For deficiency of the prior art, this utility model provides a kind of anti-release fracturing hole sealing device, by existing cylindrical capsule changes into bulge shape, thus increases the adhesive force of capsule and boring, prevent capsule in fracturing process to be pushed out boring.
The technical scheme is that a kind of anti-release fracturing hole sealing device, including being disposed with sealing of hole capsule, check valve, plug on pressure break pipe；Pressure break pipe from sealing of hole capsule center through and part in sealing of hole capsule be provided with apopore, pressure break tube end is provided with plug, is provided with check valve in the middle of capsule and plug.
Described sealing of hole capsule is bulge shape, is divided into 3 sections by length, and mid portion diameter is big, two ends diameter is little, and capsule two ends are fixed on pressure break pipe by high pressure pipe collar.
The diameter of the mid portion that described sealing of hole capsule diameter increases is less than bore diameter.
The mid portion length that described sealing of hole capsule diameter increases is less than bore expanded hole segment length.
The beneficial effects of the utility model are: compared with traditional waterpower hole packer, this sealing of hole capsule uses the design of bulge shape, after sealing of hole capsule expands, " belly " that capsule is heaved embeds in the cavity after bore expanded hole just, when pressure break starts, capsule by fracturing section water under high pressure to capsule along the outside thrust of borehole axial, balance each other therewith, capsule is in addition to by with the frictional force of the wall of a borehole, also receive boring cavity to capsule to boring in thrust, greatly strengthen the stability of capsule, effectively prevent capsule and be pushed out the danger of boring.This apparatus structure is simple, workable, it is simple to Technique Popularizing.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram before this utility model pressure break.
Fig. 2 is this utility model post-fracturing apparatus structure schematic diagram.
Detailed description of the invention
Shown in 1,2, a kind of anti-release fracturing hole sealing device is described further below in conjunction with the accompanying drawings, along the long 80m of coal bed drilling, aperture 94mm in this example.For realizing the safe and effective sealing of hole of this fracturing boring, this utility model uses following device and method for sealing.
As it is shown in figure 1, a kind of anti-release fracturing hole sealing device, including being disposed with sealing of hole capsule (3), check valve (5), plug (6) etc. on pressure break pipe (1)；Pressure break pipe (1) from sealing of hole capsule (3) center through and part in sealing of hole capsule (3) be provided with apopore (4), pressure break pipe (1) end is provided with plug (6), is provided with check valve (5) in the middle of capsule (3) and plug (6).
Particularly, sealing of hole capsule (3) is bulge shape, is divided into 3 sections by length, and mid portion diameter is big, two ends diameter is little, and capsule (3) two ends are fixed on pressure break pipe (1) by high pressure pipe collar (2).
Particularly, the diameter of the mid portion that sealing of hole capsule (3) diameter increases is less than bore diameter.
During sealing of hole, this hole sealing device with other equipment with the use of, this method for sealing comprises the steps:
(1) design before construction: according to the lithology that boring country rock is coal seam and the character of suitable coal bed drilling, determine that drilling and sealing segment length is 1.5m, hole sealing depth 5m, sealing of hole capsule (3) overall length 1.5m is designed according to sealing of hole segment length, it is equally divided into 3 sections, the long 0.5m of single hop, mid portion diameter 80mm, two ends diameter 60mm, bore expanded hole sector hole footpath is 120mm, long 0.8m；
(2) reaming: with Special reamer at the boring cavity expanding a segment length 0.8m, diameter 120mm at hell 3.7m；
(3) hole sealing device is entered under: by entering in boring under anti-release fracturing hole sealing device, write down outside sealing of hole capsule (3) " belly " section away from hell distance, enter under arresting stop when this distance reaches 3.8m；
(4) fracturing pump is connected with pressure break pipe (1), pressure testing check each section all connection after, open fracturing pump, fracturing fluid makes capsule (3) expand in entering sealing of hole capsule (3) by the apopore on pressure break pipe, capsule (3) mid portion expands and embeds the cavity at bore expanded hole close contact therewith, close contact at capsule (3) two ends and non-reaming of holing, it is achieved the sealing of hole of boring；Along with injection pressure constantly raises, after reaching check valve (5) unlatching pressure, fracturing fluid flows into pressure break target zone in boring in check valve (5)；
(5) closing fracturing pump after pressure break completes, sealing of hole capsule (3) solution is honored as a queen and fracturing string is extracted boring.
Particularly, the mid portion length that sealing of hole capsule (3) diameter increases is less than bore expanded hole segment length.
Claims (4)
1. an anti-release fracturing hole sealing device, it is characterised in that: it is disposed with sealing of hole capsule, check valve, plug on pressure break pipe；Pressure break pipe from sealing of hole capsule center through and part in sealing of hole capsule be provided with apopore, pressure break tube end is provided with plug, is provided with check valve in the middle of capsule and plug.
One the most according to claim 1 anti-release fracturing hole sealing device, it is characterized in that: described sealing of hole capsule is bulge shape, being divided into 3 sections by length, mid portion diameter is big, two ends diameter is little, and capsule two ends are fixed on pressure break pipe by high pressure pipe collar.
One the most according to claim 2 anti-release fracturing hole sealing device, it is characterised in that: the diameter of the mid portion that described sealing of hole capsule diameter increases is less than bore diameter.
One the most according to claim 3 anti-release fracturing hole sealing device, it is characterised in that: the mid portion length that described sealing of hole capsule diameter increases is less than bore expanded hole segment length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620048223.XU CN205477511U (en) | 2016-01-19 | 2016-01-19 | Prevent releasing hydraulic fracturing hole sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620048223.XU CN205477511U (en) | 2016-01-19 | 2016-01-19 | Prevent releasing hydraulic fracturing hole sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205477511U true CN205477511U (en) | 2016-08-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620048223.XU Expired - Fee Related CN205477511U (en) | 2016-01-19 | 2016-01-19 | Prevent releasing hydraulic fracturing hole sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205477511U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757000A (en) * | 2018-04-12 | 2018-11-06 | 山东科技大学 | A kind of quick slot orientation fracturing system in underground based on drilling machine power and method |
| CN117552786A (en) * | 2024-01-12 | 2024-02-13 | 中煤科工开采研究院有限公司 | Top plate frosted jet flow fracturing and top cutting device and top cutting method |
-
2016
- 2016-01-19 CN CN201620048223.XU patent/CN205477511U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757000A (en) * | 2018-04-12 | 2018-11-06 | 山东科技大学 | A kind of quick slot orientation fracturing system in underground based on drilling machine power and method |
| CN108757000B (en) * | 2018-04-12 | 2019-09-24 | 山东科技大学 | A kind of quick slot orientation fracturing system in underground based on drilling machine power and method |
| US10774591B2 (en) | 2018-04-12 | 2020-09-15 | Shandong University Of Science And Technology | Drill-power-based directional hydraulic fracturing system for downhole quick slotting and method thereof |
| CN117552786A (en) * | 2024-01-12 | 2024-02-13 | 中煤科工开采研究院有限公司 | Top plate frosted jet flow fracturing and top cutting device and top cutting method |
| CN117552786B (en) * | 2024-01-12 | 2024-04-09 | 中煤科工开采研究院有限公司 | Top plate frosted jet flow fracturing and top cutting device and top cutting 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: 20160817 Termination date: 20170119 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |