CN107905760B - Self-anchoring, self-sealing and high-pressure water injection fracturing integrated device and control method - Google Patents
Self-anchoring, self-sealing and high-pressure water injection fracturing integrated device and control method Download PDFInfo
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- CN107905760B CN107905760B CN201711077191.1A CN201711077191A CN107905760B CN 107905760 B CN107905760 B CN 107905760B CN 201711077191 A CN201711077191 A CN 201711077191A CN 107905760 B CN107905760 B CN 107905760B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 129
- 238000007789 sealing Methods 0.000 title claims abstract description 95
- 238000004873 anchoring Methods 0.000 title claims abstract description 66
- 238000002347 injection Methods 0.000 title claims abstract description 57
- 239000007924 injection Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000005553 drilling Methods 0.000 claims abstract description 24
- 239000003245 coal Substances 0.000 claims abstract description 22
- 230000009471 action Effects 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 41
- 239000010959 steel Substances 0.000 claims description 41
- 238000000605 extraction Methods 0.000 claims description 11
- 230000010354 integration Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000011084 recovery Methods 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 239000002775 capsule Substances 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
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- 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
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
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- 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
- E21B43/006—Production of coal-bed methane
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- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a self-anchoring, self-sealing, high-pressure water injection and fracturing integrated device and a control method, wherein the device comprises an anchoring unit, a hole sealing unit and a fracturing unit, wherein the anchoring unit is arranged on a drill rod and used for anchoring the drill rod in a borehole wall during high-pressure water injection; the hole sealing unit is arranged at the front side of the anchoring unit and is used for sealing holes of drill holes, and the high-pressure rubber tube in the hole sealing unit is expanded under the action of high-pressure water to realize hole sealing; the fracturing unit is arranged on the front side of the hole sealing unit and is used for fracturing a coal seam at a drilling position after high-pressure water is injected. The hydraulic fracturing device realizes the integration of hydraulic fracturing, hole sealing and anchoring, reduces the risk of pressure leakage caused by loose hole sealing, reduces the time for replacing the drill rod, can reduce one third of fracturing time, is convenient to recycle, is convenient to use, has novel structure and has good application prospect.
Description
Technical Field
The invention relates to a self-anchoring, self-sealing, high-pressure water injection and fracturing integrated device and a control method, and belongs to the technical field of gas extraction.
Background
Along with the increase of the mining depth of the coal mine, many coal mines face the problem that high-gas low-permeability coal seam gas is difficult to pre-pump, the problem severely restricts the safe production of the coal mine, and one of the most main means for solving the problem of gas emission and outburst in the mining process of the coal mine is high-pressure water injection or hydraulic fracturing. However, in the process of high-pressure water injection or hydraulic fracturing under coal mine, the current hole sealing mode in China mainly adopts cement mortar permanent hole sealing and capsule type self-sealing hole sealing devices for hole sealing. Although the cement mortar hole sealing has certain strength, because cement has a tendency of shrinkage after solidification, cracks can be generated on the wall of a drilled hole to cause gas leakage, and particularly for small-dip-angle drilled holes, the shrinkage of the cement inevitably generates large cracks on the upper wall of the drilled hole, and the hole sealing cost is higher. The capsule type self-sealing hole packer sometimes has small friction resistance, and sometimes the hole packer slides, even slides out of a drilling hole to cause accidents.
Through the discussion, in the existing underground hole sealing mode, the hole sealing cost of cement mortar is high, and sometimes the hole sealing quality is problematic; in the capsule type self-sealing water conservancy fracturing and high-pressure water injection technology, the hole sealing, fracturing and water injection methods have different defects and are not anchored by a hole sealing device. How to overcome the problems, the extraction effect of the drilling hole is improved, and the service time of the drilling hole is prolonged, which is a problem to be solved at present.
Disclosure of Invention
The invention aims to overcome the defects of poor air permeability and small extraction amount of the existing gas drilling extraction coal seam, and solves the problems of long time and the like of the anchoring, hole sealing and fracturing methods of the drilling. The self-anchoring, self-sealing and high-pressure water injection fracturing integrated device and the control method solve the problems of multiple technical processes, long time consumption, poor sealing effect and difficult recovery existing in the process of implementing anchoring, sealing and fracturing in the drilling extraction process, realize the integration of hydraulic fracturing, hole sealing and anchoring, are convenient to recover and use, have novel structures and good application prospects.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an integrated device for self-anchoring, self-sealing and high-pressure water injection fracturing comprises an anchoring unit, a hole sealing unit and a fracturing unit,
the anchoring unit is arranged on the drill rod and used for anchoring the drill rod in the wall of a drilling hole when high-pressure water injection or fracturing is carried out;
the hole sealing unit is arranged at the front side of the anchoring unit and is used for sealing holes of drill holes, and the high-pressure rubber tube in the hole sealing unit is expanded under the action of high-pressure water to realize hole sealing;
the fracturing unit is arranged on the front side of the hole sealing unit and is used for fracturing a coal seam at a drilling position after high-pressure water is injected.
The integrated device for self-anchoring, self-sealing and high-pressure water injection fracturing comprises an anchoring unit, wherein the anchoring unit comprises a drill rod connecting terminal, a hydraulic cylinder cone valve, a supporting pawl and a pawl reset spring, the rear end part of the drill rod connecting terminal is sleeved and fixed on a drill rod, the hydraulic cylinder cone valve is arranged on the inner wall of the front end part of the drill rod connecting terminal, the supporting pawl is arranged in the drill rod connecting terminal, the pawl reset spring is arranged between the supporting pawl and the inner wall of the drill rod connecting terminal, the movable end of the supporting pawl can extend out of the drill rod connecting terminal, and the front end part of the drill rod connecting terminal is communicated with a hole sealing unit.
The hole sealing unit comprises a high-pressure rubber tube, a water shutoff steel ball and a steel ball reset spring, wherein the rear end part of the high-pressure rubber tube is communicated with the front end part of a drill rod connecting terminal, the water shutoff steel ball is arranged at the front end part of the high-pressure rubber tube, and the water shutoff steel ball is connected with the fracturing unit through the steel ball reset spring.
The self-anchoring, self-sealing and high-pressure water injection fracturing integrated device comprises a fracturing unit, wherein the fracturing unit comprises a pressure adjusting bolt and a fracturing water injection port, the pressure adjusting bolt is used for propping against a steel ball reset spring, the fracturing water injection port is arranged on the outer side of the steel ball reset spring, and when a water blocking steel ball moves to the front side of the fracturing water injection port under the control of high-pressure water, the fracturing unit is used for injecting water through the fracturing water injection port and fracturing a coal seam at a drilling position.
The hydraulic cylinder cone valve is used for connecting high-pressure water inlet, and the high-pressure water enters the high-pressure rubber tube through the hydraulic cylinder cone valve.
The self-anchoring, self-sealing and high-pressure water injection fracturing integrated device has the advantages that the movable end of the supporting pawl can extend out to be connected with the drill rod terminal, and the hydraulic cylinder cone valve pushes the movable end of the supporting pawl to extend outwards along the radial direction of the drill rod under the action of high-pressure water and be clamped on the wall of the drill hole, so that anchoring is realized.
A control method of a self-anchoring, self-sealing and high-pressure water injection fracturing integrated device comprises the following steps,
the method comprises the following steps that (A), high-pressure water enters an anchoring unit through a hydraulic cylinder cone valve, the hydraulic cylinder cone valve pushes the movable end of a supporting pawl at the outer side of the hydraulic cylinder cone valve to extend outwards along the radial direction of a drill rod and is clamped on the wall of a drill hole, and the greater the pressure of the high-pressure water is, the greater the outward pushing force generated by the hydraulic cylinder cone valve is, the greater the supporting pawl achieves the effect of anchoring the drill rod;
step (B), high-pressure water enters a hole sealing unit after passing through an anchoring unit, the high-pressure water enters a high-pressure rubber pipe to expand the high-pressure rubber pipe to seal a drilled hole, and the pressure adjusting bolt of a fracturing unit is adjusted to ensure that the hole sealing pressure in the high-pressure rubber pipe is 2-8Mpa higher than the high-pressure water pressure and ensure effective plugging of the drilled hole;
the high-pressure water continues to provide pressure, when the pressure is larger than the elasticity provided by the steel ball reset spring for the water plugging steel ball, and when the water plugging steel ball moves to the front side of the fracturing water injection port, the fracturing unit injects water outwards through the fracturing water injection port, fractures the coal seam at the drilling hole, provides pressure between 30 and 40Mpa, and performs high-pressure water injection or fracturing on the coal seam;
and (D) stopping injecting high-pressure water after gas extraction is completed, recovering the high-pressure rubber pipe after pressure relief, recovering the water shutoff steel ball to an initial position under the pressure of the steel ball reset spring, and recovering the supporting pawl under the action of the pawl reset spring so as to be reused.
The control method of the self-anchoring, self-sealing and high-pressure water injection fracturing integrated device comprises the step (B) of ensuring that the hole sealing pressure in the high-pressure rubber tube is 2-8Mpa higher than the high-pressure water injection or fracturing pressure.
The control method of the self-anchoring, self-sealing and high-pressure water injection fracturing integrated device comprises the following step (C), wherein the fracturing unit is used for injecting water through a fracturing water injection port to fracture a coal bed at a drilling position, and the pressure is 35Mpa.
The beneficial effects of the invention are as follows: the self-anchoring, self-sealing and high-pressure water injection fracturing integrated device and the control method solve the problems of multiple technical processes, long time consumption, poor sealing effect and difficult recovery existing in the process of implementing anchoring, sealing and fracturing in the drilling extraction process, realize the integration of hydraulic fracturing, hole sealing and anchoring, are convenient to recover and use, have novel structures and good application prospects.
Drawings
FIG. 1 is a schematic structural view of a self-anchoring, self-sealing, high pressure water injection fracturing integrated device of the present invention;
FIG. 2 is a schematic structural view of an anchoring unit structure of the present invention;
fig. 3 is a schematic diagram of the hole sealing unit and the structure of the hole sealing unit according to the present invention.
The meaning of the symbols in the drawings is as follows:
1: connecting a drill rod terminal; 2: a hydraulic cylinder cone valve; 3: a supporting pawl; 4: a pawl return spring; 5: a drill rod; 6: a high pressure hose; 7: a water blocking steel ball; 8: an adjusting bolt; 9: fracturing a water injection port; 10: and a steel ball return spring.
Description of the embodiments
The invention will be further described with reference to the drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
The invention relates to a self-anchoring and self-sealing type high-pressure water injection fracturing integrated device which comprises an anchoring unit, a hole sealing unit and a fracturing unit,
the anchoring unit is arranged on the drill rod and used for anchoring the drill rod in the wall of a drilling hole when high-pressure water injection or fracturing is carried out;
the hole sealing unit is arranged at the front side of the anchoring unit and is used for sealing holes of drill holes, and the high-pressure rubber tube in the hole sealing unit is expanded under the action of high-pressure water to realize hole sealing;
the fracturing unit is arranged on the front side of the hole sealing unit and is used for fracturing a coal seam at a drilling position after high-pressure water is injected.
The invention relates to a self-anchoring and self-sealing type high-pressure water injection fracturing integrated device, which has a specific structure schematic diagram, as shown in figures 1-3,
the anchoring unit comprises a drill rod connecting terminal 1, a hydraulic cylinder cone valve 2, a supporting pawl 3 and a pawl reset spring 4, wherein the rear end part of the drill rod connecting terminal 1 is sleeved and fixed on a drill rod 5, the hydraulic cylinder cone valve 2 is arranged on the inner wall of the front end part of the drill rod connecting terminal 1, the supporting pawl 3 is arranged in the drill rod connecting terminal 1, the pawl reset spring 4 is arranged between the supporting pawl 3 and the inner wall of the drill rod connecting terminal 1, the movable end of the supporting pawl 3 can extend out of the drill rod connecting terminal 1, and the front end part of the drill rod connecting terminal 1 is communicated with the hole sealing unit.
The hole sealing unit comprises a high-pressure rubber tube 6, a water shutoff steel ball 7 and a steel ball reset spring 10, wherein the rear end part of the high-pressure rubber tube 6 is communicated with the front end part of the drill rod receiving terminal 1, the water shutoff steel ball 7 is arranged at the front end part of the high-pressure rubber tube 6, and the water shutoff steel ball 7 is connected with the fracturing unit through the steel ball reset spring 10.
The fracturing unit comprises a pressure adjusting bolt 8 and a fracturing water injection port 9, wherein the pressure adjusting bolt 8 is used for propping against a steel ball reset spring 10, the fracturing water injection port 9 is arranged on the outer side of the steel ball reset spring 10, and when the water plugging steel ball 7 moves to the front side of the fracturing water injection port 9 under the control of high-pressure water, the fracturing unit is used for injecting water through the fracturing water injection port 9 and fracturing a coal seam at a drilling position.
The hydraulic cylinder cone valve 2 is used for connecting high-pressure water inlet, and the high-pressure water enters the high-pressure rubber tube 6 through the hydraulic cylinder cone valve 2.
The movable end of the supporting pawl 3 can extend out to be connected with the drill rod terminal 1, and the hydraulic cylinder cone valve 2 pushes the movable end of the supporting pawl 3 to extend outwards along the radial direction of the drill rod 5 and be clamped on the wall of a drill hole under the action of high-pressure water, so that anchoring is realized.
The invention relates to a control method of a self-anchoring and self-sealing type high-pressure water injection fracturing integrated device, which comprises the following steps,
the high-pressure water enters the anchoring unit through the hydraulic cylinder cone valve 2, the hydraulic cylinder cone valve 2 pushes the movable end of the supporting pawl 3 on the outer side of the hydraulic cylinder cone valve to extend outwards along the radial direction of the drill rod 5 and is clamped on the wall of a drill hole, and the larger the pressure of the high-pressure water is, the larger the outward pushing force generated by the hydraulic cylinder cone valve 2 is, so that the supporting pawl 3 realizes the effect of anchoring the drill rod 5;
step (B), high-pressure water enters a hole sealing unit after passing through an anchoring unit, the high-pressure water enters a high-pressure rubber tube 6 to expand the high-pressure rubber tube to seal a drilled hole, and the pressure adjusting bolt 8 of a fracturing unit is adjusted to ensure that the hole sealing pressure in the high-pressure rubber tube 6 is 2-8Mpa, preferably 6Mpa, and ensure that the drilled hole is effectively plugged;
the high-pressure water continues to provide pressure, when the pressure is larger than the elasticity provided by the steel ball reset spring 10 to the water plugging steel ball 7, the water is injected outwards through the water injection port 9 when the water plugging steel ball 7 moves to the front side of the water injection port 9, the fracturing unit carries out fracturing on a coal bed at a drilling hole through the water injection port 9, the pressure is provided between 30 and 40Mpa, preferably 35Mpa, and gas extraction is carried out;
and (D) stopping injecting high-pressure water after gas extraction is completed, recovering the high-pressure rubber tube 6 after pressure relief, recovering the water blocking steel ball 7 to the initial position under the pressure of the steel ball reset spring 10, recovering the supporting pawl 3 under the action of the pawl reset spring 4, recycling, realizing the integration of hydraulic fracturing, hole sealing and anchoring, and being convenient for recovery.
In summary, the self-anchoring, self-sealing and high-pressure water injection fracturing integrated device and the control method solve the problems that the existing coal mine self-sealing hole packer is not firm in sliding hole sealing towards holes and poor in sealing performance due to insufficient hole sealing friction resistance, solve the problems of multiple technical processes, long consumption time, poor sealing effect and difficult recovery in the process of anchoring, sealing and fracturing in the process of drilling and extracting, realize hydraulic fracturing, hole sealing and anchoring integration, facilitate recovery, are convenient to use and novel in structure, and have good application prospects.
The foregoing has outlined and described the basic principles, features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A control method of an integrated device for self-anchoring, self-sealing and high-pressure water injection fracturing is characterized by comprising the following steps of: the self-anchoring, self-sealing and high-pressure water injection fracturing integrated device comprises an anchoring unit, a hole sealing unit and a fracturing unit,
the anchoring unit is arranged on the drill rod and used for anchoring the drill rod in the wall of a drilling hole when high-pressure water injection or fracturing is carried out;
the anchoring unit comprises a drill rod connecting terminal (1), a hydraulic cylinder cone valve (2), a supporting pawl (3) and a pawl reset spring (4), wherein the rear end part of the drill rod connecting terminal (1) is sleeved and fixed on a drill rod (5), the hydraulic cylinder cone valve (2) is arranged on the inner wall of the front end part of the drill rod connecting terminal (1), the supporting pawl (3) is arranged in the drill rod connecting terminal (1), the pawl reset spring (4) is arranged between the supporting pawl (3) and the inner wall of the drill rod connecting terminal (1), the movable end of the supporting pawl (3) can extend out of the drill rod connecting terminal (1), and the front end part of the drill rod connecting terminal (1) is communicated with the hole sealing unit;
the hole sealing unit is arranged at the front side of the anchoring unit and is used for sealing holes of drill holes, and the high-pressure rubber tube in the hole sealing unit is expanded under the action of high-pressure water to realize hole sealing;
the hole sealing unit comprises a high-pressure rubber tube (6), a water shutoff steel ball (7) and a steel ball reset spring (10), wherein the rear end part of the high-pressure rubber tube (6) is communicated with the front end part of the drill rod connecting terminal (1), the water shutoff steel ball (7) is arranged at the front end part of the high-pressure rubber tube (6), and the water shutoff steel ball (7) is connected with the fracturing unit through the steel ball reset spring (10);
the fracturing unit is arranged at the front side of the hole sealing unit and is used for fracturing a coal seam at a drilling position after high-pressure water is injected;
the fracturing unit comprises a pressure adjusting bolt (8) and a fracturing water injection port (9), wherein the pressure adjusting bolt (8) is used for propping against a steel ball reset spring (10), the fracturing water injection port (9) is arranged on the outer side of the steel ball reset spring (10), and when the water shutoff steel ball (7) moves to the front side of the fracturing water injection port (9) under the control of high-pressure water, the fracturing unit injects water through the fracturing water injection port (9) to fracture a coal seam at a drilling position;
the control method comprises the following steps:
the method comprises the following steps that (A), high-pressure water enters an anchoring unit through a hydraulic cylinder cone valve (2), the hydraulic cylinder cone valve (2) pushes the movable end of a supporting pawl (3) on the outer side of the hydraulic cylinder cone valve to extend outwards along the radial direction of a drill rod (5) and is clamped on the wall of the drill hole, and the larger the pressure of the high-pressure water is, the larger the outward thrust generated by the hydraulic cylinder cone valve (2) is, the supporting pawl (3) realizes the function of anchoring the drill rod (5);
step (B), high-pressure water enters a hole sealing unit after passing through an anchoring unit, the high-pressure water enters a high-pressure rubber pipe (6) to expand the high-pressure rubber pipe to seal holes of the drilled holes, and the pressure adjusting bolts (8) of the fracturing unit are adjusted to ensure that the hole sealing pressure in the high-pressure rubber pipe (6) is 2-8Mpa higher than the high-pressure water pressure and ensure effective plugging of the drilled holes;
the high-pressure water continues to provide pressure, when the pressure is larger than the elasticity provided by the steel ball reset spring (10) to the water shutoff steel ball (7), the water shutoff steel ball (7) is moved to the front side of the fracturing water injection port (9), the fracturing water injection port (9) is injected outwards, the fracturing unit injects water through the fracturing water injection port (9), fracturing is carried out on a coal bed at a drilling hole, the pressure is provided to be 30-40Mpa, and gas extraction is carried out;
and (D) stopping injecting high-pressure water after gas extraction is completed, recovering the high-pressure rubber tube (6) after pressure relief, recovering the water shutoff steel ball (7) to an initial position under the pressure of the steel ball reset spring (10), and recovering the supporting pawl (3) under the action of the pawl reset spring (4) so as to be reusable.
2. The control method of the self-anchoring, self-sealing and high-pressure water injection fracturing integrated device according to claim 1, wherein the control method comprises the following steps: the hydraulic cylinder cone valve (2) is used for connecting high-pressure water, and the high-pressure water enters the high-pressure rubber tube (6) through the hydraulic cylinder cone valve (2).
3. The control method of the self-anchoring, self-sealing and high-pressure water injection fracturing integrated device according to claim 1, wherein the control method comprises the following steps: the movable end of the supporting pawl (3) can extend out to be connected with the drill rod terminal (1), and the hydraulic cylinder cone valve (2) pushes the movable end of the supporting pawl (3) to extend outwards along the radial direction of the drill rod (5) and be clamped on the wall of a drill hole under the action of high-pressure water, so that anchoring is realized.
4. The control method of the self-anchoring, self-sealing and high-pressure water injection fracturing integrated device according to claim 1, wherein the control method comprises the following steps: and (B) ensuring that the hole sealing pressure in the high-pressure rubber tube (6) is higher than the high-pressure water pressure by 6Mpa.
5. The control method of the self-anchoring, self-sealing and high-pressure water injection fracturing integrated device according to claim 1, wherein the control method comprises the following steps: and (C) injecting water into the coal seam at the drilling position through a fracturing water injection port (9) by the fracturing unit, and fracturing the coal seam at the drilling position to provide the pressure of 35Mpa.
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| CN109632625B (en) * | 2018-10-29 | 2020-04-03 | 中国矿业大学 | Tectonic coal in-situ coal bed gas horizontal well pressure relief test device and test method |
| CN111425175B (en) * | 2020-04-02 | 2022-03-25 | 西安科技大学 | Coal rock stratum high-pressure hole sealing pressure relief protection method |
| CN111425176B (en) * | 2020-04-02 | 2022-03-18 | 西安科技大学 | Coal and rock stratum high-pressure hole sealing and pressure maintaining and releasing device |
| CN111998747B (en) * | 2020-09-03 | 2022-06-14 | 鄂托克前旗长城六号矿业有限公司 | Quick hole sealing device and method for underground blast hole |
| CN112145118B (en) * | 2020-10-19 | 2022-05-13 | 华北科技学院 | Double-end water plugging device integrating drilling peeking function and method |
| CN112412388B (en) * | 2020-11-23 | 2021-09-21 | 中国矿业大学 | Reusable gas drilling two-plugging one-injection integrated setting packer |
| CN112832709B (en) * | 2020-12-31 | 2022-05-20 | 河北邦田矿山安全设备有限公司 | Hole packer |
| CN114658360A (en) * | 2022-05-09 | 2022-06-24 | 中国铁建重工集团股份有限公司 | Anti-rotation supporting device and directional core drill |
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| JP2007009645A (en) * | 2005-07-04 | 2007-01-18 | Geotechnos Co Ltd | Method of hydraulic fracture test |
| CN103742115A (en) * | 2013-12-18 | 2014-04-23 | 中国矿业大学 | Underground coal mine fracture sealing device and method |
| CN105507940A (en) * | 2016-01-11 | 2016-04-20 | 山东科技大学 | Slotting, plugging and fracturing integrated type intensified marsh gas extraction device and method |
| CN207660586U (en) * | 2017-11-06 | 2018-07-27 | 辽宁工程技术大学 | From anchoring, the integrated apparatus of self-sealing, high pressure water injection pressure break |
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