CN216306002U - Hydraulic cavitation orifice prevention device - Google Patents
Hydraulic cavitation orifice prevention device Download PDFInfo
- Publication number
- CN216306002U CN216306002U CN202122645676.4U CN202122645676U CN216306002U CN 216306002 U CN216306002 U CN 216306002U CN 202122645676 U CN202122645676 U CN 202122645676U CN 216306002 U CN216306002 U CN 216306002U
- Authority
- CN
- China
- Prior art keywords
- sleeve
- hole
- way pipe
- port
- drill
- 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.)
- Expired - Fee Related
Links
- 230000002265 prevention Effects 0.000 title description 3
- 239000003245 coal Substances 0.000 claims abstract description 59
- 238000000926 separation method Methods 0.000 claims abstract description 50
- 238000007789 sealing Methods 0.000 claims abstract description 46
- 238000005553 drilling Methods 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 8
- 238000005507 spraying Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 43
- 238000000605 extraction Methods 0.000 description 12
- 239000007921 spray Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model discloses a hydraulic cavitation orifice-preventing device which comprises a positioning hole-sealing sleeve pipe assembly, a three-way pipe and a coal water gas separation device, wherein the positioning hole-sealing sleeve pipe assembly extends into and is positioned inside an orifice section of a drill hole from left to right, the left port of the positioning hole-sealing sleeve pipe assembly is connected with the right port of the three-way pipe, the lower port of the three-way pipe is connected with an inlet of the coal water gas separation device, a valve is arranged at the lower port of the three-way pipe, and the left port of the three-way pipe, the right port of the three-way pipe, the central hole of the positioning hole-sealing sleeve pipe assembly and the central line of the drill hole are coincided. The hydraulic hole-making method is scientific in principle and ingenious in design, adopts a mode of additionally installing a positioning hole-sealing sleeve assembly at a hydraulic hole-making orifice, and is used when a drill hole is seriously sprayed with a hole; the drill hole can be closed in time, the gas on the air return side is not over-limited, the safety problems that the sprayed coal body hurts people, a drilling machine is buried and the like are avoided, the problem of spraying holes in the hydraulic hole making process can be effectively solved, and the safety and the reliability of the hydraulic hole making work are ensured.
Description
Technical Field
The utility model belongs to the technical field of coal mine safety production, and particularly relates to a hydraulic cave-making blowout-preventing hole device.
Background
Most coal seams in China have the characteristic of 'three high and one low', and the coal seams have generally high gas content and are not beneficial to safe production. In order to ensure the safe production of a mine, measures for increasing permeability and promoting gas extraction need to be carried out on the coal seam, so that the gas permeability of the coal seam is increased, and the gas extraction effect is enhanced.
Scholars at home and abroad make a great deal of research on the permeability-increasing technology of coal seams, and provide hydraulic measures such as protective layer mining, hydraulic fracturing, hydraulic slotting, hydraulic punching and the like, deep hole loosening blasting and liquid CO2Measures such as phase change crackingAnd (4) applying. In the anti-reflection pumping-promoting technical measures, the protective layer mining is suitable for mining conditions of coal seam groups, but most coal seams in China belong to a single coal seam; the technical measures such as hydraulic fracturing and hydraulic slotting can effectively increase the air permeability of the coal bed, but are applicable to medium and hard coal beds; although the hydraulic punching technical measure can be suitable for medium and soft coal seams, the hydraulic punching technical measure needs to have rock drift conditions and needs a larger engineering quantity; deep hole loosening blasting and liquid CO2The phase change cracking technology and the like are influenced by factors such as civil explosive article control and the like, and the application range of the phase change cracking technology and the like is greatly limited.
Aiming at a single low-permeability coal seam, the hydraulic hole-making technical measure is a very effective technical measure. The technical measure is that in a coal mining layer crossheading, a large hole (cave) is punched in a coal body by utilizing the coal breaking effect and the hydraulic scouring effect of high-pressure water, and the surrounding coal body is transported into the hole under the action of strong ground stress to fully relieve pressure of the coal body, so that a large number of cracks are generated in the coal body in a large range around the hole, the air permeability of the coal body is greatly improved, the purposes of increasing permeability and promoting pumping are achieved, the application is wide, and a good effect is achieved.
The hydraulic cave-building technology has good permeability-increasing and pumping-promoting effects, so that when the technology is applied to an area with a high coal seam gas content, due to strong coal breaking and pressure relief effects, gas in a coal body is quickly desorbed in the hydraulic cave-building process, so that spray holes are serious in the hydraulic cave-building process, a large amount of sprayed coal and gas intensively enter a working face in a short time, the gas concentration on the air return side of the working face is over-limited, the sprayed coal and gas can hurt people and the like, and certain potential safety hazards are brought. Although a plurality of blowout preventers are available in the market, when gas orifices are serious, the jetted gas cannot be timely and completely treated by an extraction system, and the problems of gas overrun and the like are still caused; and if the duration of the spray holes is long and the strength is high, the sprayed coal cannot be quickly treated, so that the safety problems that a drilling machine is buried and the like are caused, and the popularization and the application of the hydraulic hole making technology are limited to a certain extent.
Based on the above problems, it is necessary to take practical measures to ensure that the ejected coal and gas can be processed in time during hydraulic cave-making, so that the concentration of the gas at the return air side is not exceeded, and the ejected coal can not injure people.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the hydraulic hole-making blowout-preventing device is convenient to operate, simple in structure, safe and reliable and good in using effect.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a hydraulic power cave is prevented orifice device, includes location hole sealing sleeve pipe assembly, three-way pipe and coal water gas separator, and location hole sealing sleeve pipe assembly stretches into and fixes a position inside the drill way section of drilling from left to right, and location hole sealing sleeve pipe assembly left end mouth is connected with the right-hand member mouth of three-way pipe, and the lower port of three-way pipe and coal water gas separator's access connection, the lower port department of three-way pipe are equipped with the valve, and the left port of three-way pipe, the right port of three-way pipe, the centre bore of location hole sealing sleeve pipe assembly and the coincidence of the central line of drilling.
The positioning hole sealing sleeve assembly comprises an outer sleeve and an inner sleeve which are arranged on the same central line, the inner sleeve is arranged in the outer sleeve, the outer diameter of the inner sleeve is smaller than the inner diameter of the outer sleeve, the outer diameter of the outer sleeve is slightly smaller than the diameter of an orifice section of a drilled hole, a left internal thread sleeve and a right internal thread sleeve are respectively and fixedly arranged in a left end opening and a right end opening of the outer sleeve, excircles of the left end and the right end of the inner sleeve are respectively in threaded connection with the left internal thread sleeve and the right internal thread sleeve, a plurality of groups of positioning assemblies are arranged in an annular cavity formed between the outer sleeve and the inner sleeve at intervals along the axial direction, each group of positioning assemblies comprises a bearing which is assembled on the excircle of the inner sleeve in an interference fit manner, at least three positioning rods are hinged on the outer ring of the bearing along the circumferential direction, a group of through holes are arranged on the left side of each bearing on the outer sleeve, the number of the through holes is equal to the number of the positioning rods hinged to the outer ring of each bearing, and a through hole correspondingly penetrates through the movable end of each positioning rod, the straight line at locating lever length direction place intersects and the contained angle is the acute angle with interior sleeve pipe central line, and the locating lever is reduced gradually by the hinged end with the bearing excircle to the distance of wearing out fenestrate movable end apart from the drilling drill way, and the locating lever movable end is pricked in the drill way section coal wall of drilling.
The outer sleeve is completely located in the orifice section of the drill hole, the left end of the inner sleeve extends out of the outer sleeve, the left end of the inner sleeve extends into the right end opening of the three-way pipe and is in threaded connection with the right end opening of the three-way pipe, and a driving rod for driving the inner sleeve to rotate is arranged on the inner sleeve between the three-way pipe and the outer sleeve.
And a rubber sealing sleeve is arranged in the left port of the three-way pipe, and the inner diameter of the rubber sealing sleeve is equal to the outer diameter of the drill rod.
The coal water gas separation device comprises a separation box and a rubber bag, the right side of the top of the separation box is connected with a lower port of a three-way pipe, the left side of the top of the separation box is connected with a coal mine underground gas drainage pipeline through a first high-pressure hose, the lower part of the separation box is of a rectangular pyramid cylinder structure with a big top and a small bottom, supporting legs are arranged on the outer side of the rectangular pyramid cylinder structure, a separation screen plate is horizontally arranged at the upper port of the rectangular pyramid cylinder structure in the separation box, a drainage pipe joint is connected with the lower port of the rectangular pyramid cylinder structure, and the left side of the separation box is connected with the rubber bag through a second high-pressure hose above the separation screen plate.
By adopting the technical scheme, the utility model comprises the following steps when in working and use:
(1) at the hydraulic cave drilling position, firstly constructing a drilling hole with the diameter more than 30mm and the depth not less than 10m on the coal seam, and sending a positioning hole sealing sleeve assembly into the drilling hole (the hole opening section of the drilling hole) at the section;
(2) after the positioning hole sealing sleeve assembly is sent into the positioning hole sealing sleeve assembly, the driving rod is held by a hand to rotate the inner sleeve, because the left end outer circle and the right end outer circle of the inner sleeve are respectively in threaded connection with the left inner thread sleeve and the right inner thread sleeve which are arranged inside the outer sleeve, the inner sleeve is moved leftwards (towards a drilling hole opening), when the inner sleeve rotates, because the outer circle of the inner sleeve is provided with a bearing, the positioning rod and the outer ring of the bearing do not rotate along with the inner sleeve, the bearing is gradually close to an adjacent perforation along with the inner sleeve moving leftwards, so that the movable end of the driving rod hinged on the outer circle of the bearing extends out the perforation to prick into the inner wall of the hole opening section of the drilling hole, and the positioning hole sealing sleeve assembly is tightly fixed in the hole opening section of the drilling hole;
(3) the left end of the inner sleeve is connected with an upper three-way pipe through threads;
(4) the right port of the three-way pipe is connected with the inner sleeve through threads; the lower port of the three-way pipe is connected with a separation box through a section of high-pressure-resistant pipe, the left side part of the separation box is connected with a rubber bag through a second high-pressure hose, and the rubber bag is used for collecting suddenly sprayed coal and a large amount of gas; the right side of the top of the separation box is connected with a drainage pipeline through a first high-pressure hose and is used for draining a large amount of sprayed gas in time;
(5) after the equipment is installed, performing layer drilling along the center directions of the left port, the right port and the inner sleeve of the three-way pipe until the depth L is set; then hydraulic cave making is carried out by adopting a reverse construction method, namely: firstly, drilling to a set depth L (L is more than or equal to 90 m), then, starting to withdraw the drill, and implementing hydraulic hole making in the process of withdrawing the drill, wherein the length of the hydraulic hole making is not less than L/2;
(6) in the process of hydraulic hole making, water slag and gas flow into a separation box through a gap between a drill rod and an inner sleeve and a three-way pipe, the gas is pumped away by a pumping pipeline, water is discharged through a water discharge pipe joint, and the drilling slag is left in the separation box on a separation net; if no spray hole is formed in the hydraulic hole making operation, the drill is normally withdrawn, and hydraulic hole making is carried out; if serious spray holes occur, the drilling is stopped immediately, a valve at the lower port of the three-way pipe is closed, and due to the arrangement of the rubber sealing sleeve, the spray holes can be basically and completely blocked;
(7) after the movement of the spray hole in the drill hole is ended, slowly opening a valve at the lower end port of the three-way device, gradually relieving the gas pressure in the drill hole, and discharging the sprayed gas, coal and water into a separation box;
(8) recovering normal hydraulic force to make cave after the gas pressure in the drill hole is completely removed;
(9) after the hydraulic hole making work is finished, removing the drill rod, then detaching the three-way pipe, reversely rotating the driving rod at the rear end of the inner sleeve to enable the inner sleeve to move rightwards, so that the positioning rod retracts into the outer sleeve, and then taking out the positioning hole sealing sleeve assembly from the drill hole for further use;
(10) sending the hole sealing pipe and the extraction pipe into a hydraulic hole making drill hole, and sealing the hole tightly;
(11) and after the hole sealing material is solidified, connecting the extraction pipe with an extraction system to perform gas extraction.
In summary, the present invention has the following technical effects:
1. the hydraulic hole-making method is scientific in principle and ingenious in design, adopts a mode of additionally installing a positioning hole-sealing sleeve assembly at a hydraulic hole-making orifice, and is used when a drill hole is seriously sprayed with a hole; the drill hole can be closed in time, gas on the air return side is guaranteed not to exceed the limit, safety problems such as the fact that sprayed coal hurts people and a drilling machine is buried are avoided, the problem of spraying holes in the hydraulic cave forming process can be effectively solved, the hydraulic cave forming work is safe and reliable, and the safe driving and protecting navigation are achieved for the safe production of a coal mine.
2. The positioning hole sealing sleeve pipe assembly adopts an inner sleeve pipe to move along the axial direction of the outer sleeve pipe, so that the inclination angle of the positioning rod is driven to change, the positioning rod is inserted into the coal wall of the hole sealing section of the drill hole, and the outer sleeve pipe is firmly fixed in the drill hole; after hydraulic hole making measures are implemented, the sleeve can be detached, and the positioning hole sealing sleeve assembly can be repeatedly used;
3. the coal water-gas separation device can realize gas extraction and coal water separation during normal hydraulic cave making, also can realize buffering of a large amount of coal bodies and gas sprayed out during orifice spraying, and effectively prevents the problems of gas overrun and the like.
Drawings
FIG. 1 is a schematic structural view of the present invention in an operating state;
FIG. 2 is a schematic view of the connection structure of the positioning sealing sleeve assembly and the tee in FIG. 1.
Detailed Description
As shown in fig. 1 and 2, the hydraulic cavitation orifice prevention device comprises a positioning hole sealing sleeve pipe assembly 1, a three-way pipe 2 and a coal water gas separation device, wherein the positioning hole sealing sleeve pipe assembly 1 extends into and is positioned inside an orifice section of a drill hole from left to right, a left port of the positioning hole sealing sleeve pipe assembly 1 is connected with a right port of the three-way pipe 2, a lower port of the three-way pipe 2 is connected with an inlet of the coal water gas separation device, a valve 3 is arranged at the lower port of the three-way pipe 2, and a left port of the three-way pipe 2, a right port of the three-way pipe 2, a central hole of the positioning hole sealing sleeve pipe assembly 1 and a central line of the drill hole are coincided.
The positioning hole sealing sleeve assembly 1 comprises an outer sleeve 4 and an inner sleeve 5 which are arranged on the same central line, the inner sleeve 5 is arranged inside the outer sleeve 4, the outer diameter of the inner sleeve 5 is smaller than the inner diameter of the outer sleeve 4, the outer diameter of the outer sleeve 4 is slightly smaller than the diameter of a hole opening section of a drilled hole by 0.5-2cm, a left inner thread sleeve 6 and a right inner thread sleeve 7 are respectively and fixedly arranged at the inner parts of a left end opening and a right end opening of the outer sleeve 4, excircles of the left end and the right end of the inner sleeve 5 are respectively in threaded connection with the left inner thread sleeve 6 and the right inner thread sleeve 7, a plurality of groups of positioning assemblies are arranged at intervals along the axial direction in an annular cavity formed between the outer sleeve 4 and the inner sleeve 5, each group of positioning assemblies comprises a bearing 8 which is in interference fit with the excircle of the inner sleeve 5, at least three positioning rods 9 are hinged to the outer ring of the bearing 8 along the circumferential direction, a group of perforations are arranged on the outer sleeve 4, and are equal to the number of the positioning rods 9 hinged to the outer ring of each bearing 8, the expansion end of every locating lever 9 all corresponds and wears out a perforation, and the straight line at locating lever 9 length direction place intersects and the contained angle is the acute angle with interior sleeve pipe 5 central line, and locating lever 9 is reduced gradually by the hinged end with bearing 8 excircle to the distance of wearing out perforated expansion end apart from the drilling drill way, and the expansion end of locating lever 9 pricks into in the drill way section coal wall of drilling.
The outer sleeve 4 is located in the orifice section of the drill hole, the left end of the inner sleeve 5 extends out of the outer sleeve 4, the left end of the inner sleeve 5 extends into the right end opening of the three-way pipe 2 and is in threaded connection with the right end opening of the three-way pipe 2, and a driving rod 10 for driving the inner sleeve 5 to rotate is arranged on the inner sleeve 5 between the three-way pipe 2 and the outer sleeve 4.
A rubber sealing sleeve 11 is arranged in the left port of the three-way pipe 2, and the inner diameter of the rubber sealing sleeve 11 is equal to the outer diameter of the drill rod.
The coal water gas separation device comprises a separation box 12 and a rubber bag 13, the right side of the top of the separation box 12 is connected with the lower port of a three-way pipe 2, the left side of the top of the separation box 12 is connected with a coal mine underground gas drainage pipeline 15 through a first high-pressure hose 14, the lower portion of the separation box 12 is of a rectangular pyramid cylinder structure with a large upper portion and a small lower portion, supporting legs 16 are arranged on the outer side of the rectangular pyramid cylinder structure, a separation screen plate 17 is horizontally arranged on the upper port of the rectangular pyramid cylinder structure in the separation box 12, the lower port of the rectangular pyramid cylinder structure is connected with a water discharge pipe joint 18, and the left side of the separation box 12 is connected with the rubber bag 13 through a second high-pressure hose 19 above the separation screen plate 17.
When the utility model is used, the utility model comprises the following steps:
(1) at the hydraulic cave drilling position, firstly constructing a drilling hole with the diameter more than 30mm and the depth not less than 10m on the coal seam, and sending a positioning hole sealing sleeve assembly 1 into the drilling hole (the hole opening section of the drilling hole);
(2) after the positioning hole sealing sleeve assembly 1 is sent into, the inner sleeve 5 is rotated by the aid of the handheld driving rod 10, the left end outer circle and the right end outer circle of the inner sleeve 5 are respectively in threaded connection with the left inner thread sleeve 6 and the right inner thread sleeve 7 which are arranged inside the outer sleeve 4, so that the inner sleeve 5 moves leftwards (moves towards a drilling hole opening), when the inner sleeve 5 rotates, the outer circle of the inner sleeve 5 is provided with the bearing 8, the outer circles of the positioning rod 9 and the bearing 8 do not rotate along with the inner sleeve 5, the bearing 8 moves leftwards along with the inner sleeve 5, the bearing 8 is gradually close to adjacent through holes, so that the movable end of the driving rod 10 hinged to the outer circle of the bearing 8 extends out of the through holes to be pricked into the inner wall of the hole opening section of the drilling hole, and the positioning hole sealing sleeve assembly 1 is tightly fixed in the hole opening section of the drilling hole;
(3) the left end of the inner sleeve 5 is connected with the upper three-way pipe 2 through threads;
(4) the right port of the three-way pipe 2 is connected with the inner sleeve 5 through threads; the lower port of the three-way pipe 2 is connected with a separation box 12 through a section of high-pressure-resistant pipe, the left side part of the separation box 12 is connected with a rubber bag 13 through a second high-pressure hose 19, and the rubber bag 13 is used for collecting suddenly sprayed coal and a large amount of gas; the right side of the top of the separation box 12 is connected with a drainage pipeline 15 through a first high-pressure hose 14 and is used for draining a large amount of sprayed gas in time;
(5) after the equipment is installed, bedding drilling is conducted along the left port and the right port of the three-way pipe 2 and the center direction of the inner sleeve 5, and the drilling machine 21 drives the drill rod 20 to conduct construction till the set depth L; then hydraulic cave making is carried out by adopting a reverse construction method, namely: firstly, drilling to a set depth L (L is more than or equal to 90 m), then, starting to withdraw the drill, and implementing hydraulic hole making in the process of withdrawing the drill, wherein the length of the hydraulic hole making is not less than L/2;
(6) in the process of hydraulic hole making, water slag and gas flow into the separation box 12 through a gap between the drill rod 20 and the inner sleeve 5 and the three-way pipe 2, the gas is pumped away by the pumping pipeline 15, water is discharged through the water discharge pipe joint 18, and the drilling slag is left in the separation box 12 on the separation net; if no spray hole is formed in the hydraulic hole making operation, the drill is normally withdrawn, and hydraulic hole making is carried out; if serious spray holes occur, the drilling is stopped immediately, the valve 3 at the lower port of the three-way pipe 2 is closed, and the rubber sealing sleeve 11 is arranged, so that the spray holes can be basically and completely blocked;
(7) after the movement of the spray hole in the drill hole is ended, slowly opening a valve 3 at the lower end of the three-way device, gradually relieving the gas pressure in the drill hole, and discharging the sprayed gas, coal and water into a separation box 12, wherein the safety and reliability of high-pressure spray buffering are ensured due to the arrangement of a rubber bag 13;
(8) recovering normal hydraulic force to make cave after the gas pressure in the drill hole is completely removed;
(9) after the hydraulic hole making work is finished, removing the drill rod 20, then detaching the three-way pipe 2, reversely rotating the driving rod 10 at the rear end of the inner sleeve 5, enabling the inner sleeve 5 to move rightwards, enabling the positioning rod 9 to retract into the outer sleeve 4, and then taking out the positioning hole sealing sleeve assembly 1 from the drill hole for further use;
(10) sending the hole sealing pipe and the extraction pipe into a hydraulic hole making drill hole, and sealing the hole tightly;
(11) and after the hole sealing material is solidified, connecting the extraction pipe with an extraction system to perform gas extraction.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention. Meanwhile, the directions of "front, back, left, right, up, down" and the like described in the embodiments are only for facilitating the understanding of the technical solutions by those skilled in the art, and do not limit the protection scope of the present invention.
Claims (5)
1. The utility model provides a hydraulic cavitation orifice preventing device which characterized in that: the coal water gas separation device comprises a positioning hole sealing sleeve pipe assembly, a three-way pipe and a coal water gas separation device, wherein the positioning hole sealing sleeve pipe assembly extends into the drill hole section from left to right and is positioned inside the drill hole, a left port of the positioning hole sealing sleeve pipe assembly is connected with a right port of the three-way pipe, a lower port of the three-way pipe is connected with an inlet of the coal water gas separation device, a valve is arranged at the lower port of the three-way pipe, and the left port of the three-way pipe, the right port of the three-way pipe, a center hole of the positioning hole sealing sleeve pipe assembly and the center line of the drill hole coincide.
2. The apparatus of claim 1, wherein: the positioning hole sealing sleeve assembly comprises an outer sleeve and an inner sleeve which are arranged on the same central line, the inner sleeve is arranged in the outer sleeve, the outer diameter of the inner sleeve is smaller than the inner diameter of the outer sleeve, the outer diameter of the outer sleeve is slightly smaller than the diameter of an orifice section of a drilled hole, a left internal thread sleeve and a right internal thread sleeve are respectively and fixedly arranged in a left end opening and a right end opening of the outer sleeve, excircles of the left end and the right end of the inner sleeve are respectively in threaded connection with the left internal thread sleeve and the right internal thread sleeve, a plurality of groups of positioning assemblies are arranged in an annular cavity formed between the outer sleeve and the inner sleeve at intervals along the axial direction, each group of positioning assemblies comprises a bearing which is assembled on the excircle of the inner sleeve in an interference fit manner, at least three positioning rods are hinged on the outer ring of the bearing along the circumferential direction, a group of through holes are arranged on the left side of each bearing on the outer sleeve, the number of the through holes is equal to the number of the positioning rods hinged to the outer ring of each bearing, and a through hole correspondingly penetrates through the movable end of each positioning rod, the straight line at locating lever length direction place intersects and the contained angle is the acute angle with interior sleeve pipe central line, and the locating lever is reduced gradually by the hinged end with the bearing excircle to the distance of wearing out fenestrate movable end apart from the drilling drill way, and the locating lever movable end is pricked in the drill way section coal wall of drilling.
3. The apparatus of claim 2, wherein: the outer sleeve is completely located in the orifice section of the drill hole, the left end of the inner sleeve extends out of the outer sleeve, the left end of the inner sleeve extends into the right end opening of the three-way pipe and is in threaded connection with the right end opening of the three-way pipe, and a driving rod for driving the inner sleeve to rotate is arranged on the inner sleeve between the three-way pipe and the outer sleeve.
4. A hydroexcavation blowout preventer according to claim 1, 2 or 3, wherein: and a rubber sealing sleeve is arranged in the left port of the three-way pipe, and the inner diameter of the rubber sealing sleeve is equal to the outer diameter of the drill rod.
5. A hydroexcavation blowout preventer according to claim 1, 2 or 3, wherein: the coal water gas separation device comprises a separation box and a rubber bag, the right side of the top of the separation box is connected with a lower port of a three-way pipe, the left side of the top of the separation box is connected with a coal mine underground gas drainage pipeline through a first high-pressure hose, the lower part of the separation box is of a rectangular pyramid cylinder structure with a big top and a small bottom, supporting legs are arranged on the outer side of the rectangular pyramid cylinder structure, a separation screen plate is horizontally arranged at the upper port of the rectangular pyramid cylinder structure in the separation box, a drainage pipe joint is connected with the lower port of the rectangular pyramid cylinder structure, and the left side of the separation box is connected with the rubber bag through a second high-pressure hose above the separation screen plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122645676.4U CN216306002U (en) | 2021-11-01 | 2021-11-01 | Hydraulic cavitation orifice prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122645676.4U CN216306002U (en) | 2021-11-01 | 2021-11-01 | Hydraulic cavitation orifice prevention device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216306002U true CN216306002U (en) | 2022-04-15 |
Family
ID=81117927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122645676.4U Expired - Fee Related CN216306002U (en) | 2021-11-01 | 2021-11-01 | Hydraulic cavitation orifice prevention device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216306002U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114934763A (en) * | 2022-04-29 | 2022-08-23 | 中煤科工集团重庆研究院有限公司 | Pressure relief device and method for weak-impact ultra-thick coal seam |
-
2021
- 2021-11-01 CN CN202122645676.4U patent/CN216306002U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114934763A (en) * | 2022-04-29 | 2022-08-23 | 中煤科工集团重庆研究院有限公司 | Pressure relief device and method for weak-impact ultra-thick coal seam |
| CN114934763B (en) * | 2022-04-29 | 2023-11-17 | 中煤科工集团重庆研究院有限公司 | Pressure relief device and pressure relief method for weak impact super-thick coal seam |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2016363855B2 (en) | "drilling-flushing-slotting" coupled pressure relief and permeability increasing method for high gas outburst coal seam | |
| CN106320985B (en) | Coal seam high-pressure water jet drill, which expands, cuts integrated permeability improvement device and its method | |
| CN110617044B (en) | Ultrahigh-pressure water jet slotting system and using method thereof | |
| CN104895484B (en) | A kind of underground coal mine crawler type creeps into hole-punching integrated equipment | |
| CN108547604B (en) | Drilling and stamping integrated device and method | |
| CN102094668B (en) | High-pressure hydraulic tunneling, pressure releasing and protrusion removing method for upper drainage roadway | |
| CN204098878U (en) | Device made by a kind of abrasive material perforation sandblasting pressure break connection | |
| CN101586441B (en) | High-pressure water jet system and method for drilling and enlarging holes on coal bed | |
| CN108086964A (en) | Coal bed gas horizontal well orients hydrajet tool string and construction method | |
| CN110953013B (en) | Controllable jet flow punching pressure relief and permeability increase device and method for soft coal seam | |
| CN110984130B (en) | Slurry stopping system and method for preventing blockage and slurry return outside hole of crushing belt | |
| WO2019205516A1 (en) | System for extracting gas from tectonically-deformed coal seam in-situ by depressurizing horizontal well cavity | |
| CN204851052U (en) | Integration equipment that punches a hole is crept into in colliery crawler -type in pit | |
| CN106437570A (en) | Drilling type continuous sand blasting device | |
| CN216306002U (en) | Hydraulic cavitation orifice prevention device | |
| CN109184653B (en) | Novel slotting device and method for coal mine hydraulic fracturing | |
| CN110905589A (en) | Gas extraction drilling and punching coordination operation system and method | |
| CN109610454A (en) | A kind of underground obstacle barrier clearing device and its construction method | |
| CN208416512U (en) | A kind of brill punching press integrated apparatus | |
| CN107575164A (en) | A kind of high-pressure hydraulic with the conditions of brill radially creeps into guider and method | |
| CN203547562U (en) | Integrated drilling and cutting drill stem | |
| CN105422016A (en) | Borehole cleaning system and cleaning method | |
| CN107795004A (en) | A kind of device thin clearly and its method of work for mud lamination | |
| CN208010302U (en) | A kind of spiral groove device of horizontal well pit shaft well-flushing | |
| CN115638018A (en) | Rapid cross-cut coal uncovering system and method based on physical fluidization simultaneous mining of coal and gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220415 |