CN217872732U - Drilling plugging structure - Google Patents
Drilling plugging structure Download PDFInfo
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- CN217872732U CN217872732U CN202221916937.XU CN202221916937U CN217872732U CN 217872732 U CN217872732 U CN 217872732U CN 202221916937 U CN202221916937 U CN 202221916937U CN 217872732 U CN217872732 U CN 217872732U
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Abstract
The utility model relates to a drilling block structure, including the rear end inner tube, the outside cover has end to end's rear end outer tube female joint from the back to before in proper order of rear end inner tube, rear end outer tube capsule, rear end play thick liquid pipeline section and rear end outer tube male joint, the space that forms between rear end outer tube female joint and the rear end inner tube outer wall is outer passageway one, the space that forms between rear end outer tube capsule and the rear end inner tube outer wall is outer passageway two, the space that forms between rear end play thick liquid pipeline section and the rear end inner tube outer wall is outer passageway three, the space that forms between rear end outer tube male joint and the rear end inner tube outer wall is outer passageway four, four passageway intercommunications form grout passageway, rear end outer tube capsule is including the rear end outer tube of cover on the rear end inner tube, the outside cover of rear end outer tube has the rear end capsule, the space between rear end capsule and the rear end outer tube is capsule space one, the rear end capsule can expand the back, the lateral wall of rear end capsule pastes tightly with the drilling inner wall, be provided with the one-way valve that the export orientation is capsule space one on the rear end.
Description
Technical Field
The utility model belongs to colliery is gas drainage drilling hole sealing field in the pit relates to a drilling block structure.
Background
At present, a two-plugging one-injection hole sealing technology is generally adopted for sealing holes of gas extraction drill holes in coal mines, the technology needs manual temporary assembly of a hole sealing device, and the technology has the following defects: the hole sealing device needs to be assembled manually and the hole sealing is carried out manually, so that the automation degree is low, the hole sealing procedure is complex, and the labor intensity is high; the hole packer structure is redundant.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a drilling plugging structure that simple structure can automatic hole sealing.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a drilling plugging structure comprises a rear end inner tube, a rear end outer tube female joint, a rear end outer tube capsule, a rear end slurry outlet tube section and a rear end outer tube male joint are sequentially sleeved outside the rear end inner tube from back to front, the rear end outer tube female joint, the rear end outer tube capsule, the rear end slurry outlet tube section and the rear end outer tube male joint are coaxially fixed with the rear end inner tube respectively, a space formed between the rear end outer tube female joint and the outer wall of the rear end inner tube is an outer channel I, a space formed between the rear end outer tube capsule and the outer wall of the rear end inner tube is an outer channel II, a space formed between the rear end outer tube male joint and the outer wall of the rear end inner tube is an outer channel II, the outer channel I, the outer channel II, the outer channel III and the outer channel IV are communicated to form a grouting channel, a gas extraction channel is arranged inside the rear end inner tube, the rear end outer tube capsule comprises a rear end outer tube sleeved on the rear end inner tube, a space between the rear end outer tube and the rear end inner tube is an outer tube, a rear end capsule is sleeved outside, a one-way valve is arranged on the rear end outer wall of the rear end outer tube, and a one-way valve.
Furthermore, the rear end inner pipe is fixedly connected with the rear end outer pipe female joint through a rear end strip-shaped supporting structure, and the rear end strip-shaped supporting structure is clamped into a groove corresponding to the rear end outer pipe female joint to support the pipeline.
Furthermore, a rear end strip-shaped positioning structure is arranged between the rear end inner tube and the rear end outer tube male connector, the rear end strip-shaped positioning structure is clamped in a groove of the rear end outer tube male connector, and a gap is reserved between the rear end strip-shaped positioning structures.
Furthermore, the rear part of the rear-end inner tube is a rear-end inner tube female joint, and the front part of the rear-end inner tube is a rear-end inner tube male joint used for being connected with other connecting pipelines.
Furthermore, a second one-way valve is arranged on the rear pulp outlet pipe section, and the outlet direction of the second one-way valve faces outwards.
The beneficial effects of the utility model reside in that:
the utility model discloses simple structure can realize the stifled technique in the colliery universal adoption "two stifled one notes" hole sealing technique automatically, convenient operation.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings, wherein:
FIG. 1 is a schematic structural diagram of an automatic hole sealing device;
FIG. 2 is a schematic structural view of a rear end sleeve;
FIG. 3 is a schematic view of the rear end inner tube;
FIG. 4 is a schematic structural view of an intermediate sleeve;
FIG. 5 is a schematic structural view of the intermediate inner tube;
FIG. 6 is a schematic structural view of the front end sleeve;
fig. 7 is a schematic structural view of the front end inner tube.
Reference numerals:
1. a rear end sleeve; 11. pipe blocking; 12. a rear end outer tube female joint; 13. a rear outer tube capsule; 131. a rear end outer tube; 132. a one-way valve I; 133. a back-end capsule; 14. a rear end inner tube; 141. a rear end inner tube female joint; 142. a rear end strip support structure; 143. a rear end strip-shaped positioning structure; 144. a rear end inner tube male connector; 15. a rear end slurry outlet pipe section; 151. a second one-way valve; 16. a rear end outer tube male joint; 2. an intermediate sleeve; 21. a middle outer tube female joint; 22. an intermediate outer tube; 23. a middle inner tube; 231. a middle inner tube female joint; 232. a middle strip-shaped support structure; 233. a middle strip-shaped positioning structure; 234. a middle inner tube male joint; 24. a middle outer tube male joint; 3. a front end sleeve; 31. a front end outer tube female joint; 32. a front end outer tube capsule; 321. a front end outer tube; 322. a front end capsule; 323. a one-way valve III; 33. a front end inner tube; 331. a front end inner tube female joint; 332. a front end strip support structure; 333. the front end is positioned and sealed; 334. a screen pipe.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", "front", "back", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes, and should not be construed as limitations of the present invention, and it will be understood that specific meanings of the above terms can be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 7, the automatic hole sealing device for the gas extraction borehole in the coal mine comprises a rear casing 1, an intermediate casing 2 and a front casing 3 which are sequentially connected from back to front, wherein the number of the intermediate casings 2 can be set according to requirements, two isolated channels are formed in each casing, the inner channels are communicated in series, and the outer channels are also communicated in series. The outer sides of the outer passages of the rear end sleeve 1 and the front end sleeve 3 are respectively provided with a capsule capable of expanding, and gaps between the rear end sleeve 1 and the drill hole and gaps between the front end sleeve 3 and the drill hole are respectively plugged after the capsules expand. The outer channels of the rear end sleeve 1 and the front end sleeve 3 are communicated with the space of the capsule through a one-way valve. The outer channel of the rear end casing 1 is provided with a one-way valve communicated with the drill hole, so that the hole sealing slurry can enter the space between the middle casing 2 and the drill hole from the one-way valve. The size of the outer pipe of each casing pipe is matched with the size of the drill pipe, the adjacent casing pipes are connected through threads, the front-end casing pipe 3, the middle casing pipe 2 and the rear-end casing pipe 1 are sequentially connected through an automatic drilling machine, and the casing pipes are sequentially sent into the drill hole.
As shown in fig. 2 and 3, the rear casing 1 includes a rear inner tube 14, a rear outer tube female joint 12, a rear outer tube bladder 13, a rear grout outlet tube section 15 and a rear outer tube male joint 16 are sequentially sleeved outside the rear inner tube 14 from back to front, the rear outer tube female joint 12, the rear outer tube bladder 13, the rear grout outlet tube section 15 and the rear outer tube male joint 16 are coaxial with the rear inner tube 14, the rear outer tube female joint 12 is connected with the rear end of the rear outer tube bladder 13 through a screw thread, the front end of the rear outer tube bladder 13 is connected with the rear end of the rear grout outlet tube section 15 through a screw thread, and the front end of the rear grout outlet tube section 15 is connected with the rear end of the rear outer tube male joint 16 through a screw thread. The space formed between the rear-end outer tube female connector 12 and the outer wall of the rear-end inner tube 14 is an outer channel I, the space formed between the rear-end outer tube capsule 13 and the outer wall of the rear-end inner tube 14 is an outer channel II, the space formed between the rear-end grout outlet tube section 15 and the outer wall of the rear-end inner tube 14 is an outer channel III, the space formed between the rear-end outer tube male connector 16 and the outer wall of the rear-end inner tube 14 is an outer channel IV, and the outer channel I, the outer channel II, the outer channel III and the outer channel IV are communicated to form a grouting channel.
Rear end outer tube capsule 13 is including the rear end outer tube 131 of cover on rear end inner tube 14, and the space between rear end outer tube 131 and the rear end inner tube 14 is outer passageway two, and the outside cover of rear end outer tube 131 has rear end capsule 133, and the space between rear end capsule 133 and the rear end outer tube 131 is capsule space one, and rear end capsule 133 can expand, and the inflation back, the lateral wall and the drilling inner wall of rear end capsule 133 paste tightly, are provided with check valve 132 on the rear end outer tube 131, and the exit direction of check valve 132 is capsule space one.
And a second check valve 151 is arranged on the rear-end slurry outlet pipe section 15, and the outlet direction of the second check valve 151 is a space formed by the hole sealing device and the drill hole.
The rear part of the rear end inner tube 14 is a rear end inner tube female joint 141, the front part of the rear end inner tube 14 is a rear end inner tube male joint 144, and a detachable pipe plug 11 is assembled in the rear end inner tube female joint 141 to plug the rear end inner tube 14.
The rear end inner tube 14 is connected with the rear end outer tube female joint 12 through the rear end strip-shaped supporting structure 142, the rear end strip-shaped supporting structure 142 is attached to the rear end outer tube female joint 12 to support a pipeline, and the rear end strip-shaped supporting structure 142 is not of an annular structure and does not seal an outer channel I, so that the rear end strip-shaped supporting structure 142 plays a role in supporting the rear end inner tube 14.
A rear end strip-shaped positioning structure 143 is arranged between the rear end inner tube 14 and the rear end outer tube male connector 16, the rear end strip-shaped positioning structure 143 is clamped in a groove of the rear end outer tube male connector 16 and does not block the outer channel four, and the functions of supporting the rear end inner tube 14 and preventing the rear end inner tube 14 from axially moving are achieved.
An inner hole of the inner pipe 14 at the rear end is a gas extraction channel, and a channel formed by connecting the first outer channel, the second outer channel, the third outer channel and the fourth outer channel in series is a grouting channel. After the pipe plug 11 is assembled, the pipe plug 11 prevents slurry from entering a gas extraction channel, and when gas is extracted, the pipe plug 11 is opened for gas extraction.
As shown in fig. 4 and 5, the middle sleeve 2 includes a middle inner tube 23, the middle inner tube 23 is sleeved with a middle outer tube female joint 21, a middle outer tube 22 and a middle outer tube male joint 24 from back to front in sequence, an inner hole of the middle outer tube female joint 21 is provided with a tapered thread connected with the rear end outer tube male joint 16, the middle outer tube female joint 21 is connected with the rear end outer tube male joint 16, and communication between the rear end sleeve 1 and the middle sleeve 2 is completed.
The space between the middle outer pipe female joint 21, the middle outer pipe 22, the middle outer pipe male joint 24 and the middle inner pipe 23 is respectively an outer channel five, an outer channel six and an outer channel seven, and the outer channel five, the outer channel six and the outer channel seven are connected in series to form a grouting channel. The rear end of the middle inner tube 23 is a middle inner tube female joint 231, and the smooth inner surface of the middle inner tube female joint 231 is attached to the smooth outer surface of the rear end inner tube male joint 144, so that the communication between the rear end inner tube 14 and the middle inner tube 23 is completed. The front end of the middle inner tube 23 is a middle inner tube male connector 231.
The middle inner tube 23 and the middle outer tube female joint 21 are connected through the middle strip-shaped supporting structure 232, the middle strip-shaped supporting structure 232 is attached to the middle outer tube female joint 21 to support a pipeline, and the middle strip-shaped supporting structure 232 is a strip-shaped structure and is not an annular structure, so that the middle strip-shaped supporting structure 232 cannot seal an outer channel I, and the middle inner tube 23 is supported.
A middle strip-shaped positioning structure 233 is arranged between the middle inner tube 23 and the middle outer tube male connector 24, the middle strip-shaped positioning structure 233 is clamped in the groove of the middle outer tube male connector 24 and does not block the outer channel five, and the middle inner tube 23 is supported and the middle inner tube 23 is prevented from moving axially.
The number of the middle sleeves 2 is flexibly selected according to the actual requirement of the hole sealing length, only one middle sleeve 2 can be directly connected with the front-end sleeve 3, and more than two middle sleeves 2 can also be connected in sequence to lengthen the whole hole sealing device and meet the requirement of the hole sealing length.
As shown in fig. 6 and 7, the front sleeve 3 includes a front inner tube 33, a front outer tube female connector 31 and a front outer tube capsule 32 are sequentially sleeved on the front inner tube 33 from back to front, the front outer tube female connector 31 and the front outer tube capsule 32 are connected by threads, the spaces between the front outer tube female connector 31 and the front outer tube capsule 32 and the front inner tube 33 are respectively an outer passage eight and an outer passage nine, and the outer passage eight and the outer passage nine are communicated. The inner hole of the front end outer tube female joint 31 is provided with a tapered thread connected with the middle outer tube male joint 24, and the front end outer tube female joint 31 is connected with the middle outer tube male joint 24 to complete communication between the front end sleeve 3 and the middle sleeve 2.
The rear end of the front end inner tube 33 is provided with a front end inner tube female joint 331, and the front end inner tube female joint 331 can be connected with the middle inner tube male joint 234 to realize the connection between the middle inner tube 23 and the front end inner tube 33. The front end outer tube capsule 32 comprises a front end outer tube 321 sleeved on the front end inner tube 33, a front end capsule 322 is sleeved outside the front end outer tube 321, a space between the front end capsule 322 and the front end outer tube 321 is a capsule space II, and the front end capsule 322 can expand to enable the outer side wall of the front end capsule to be tightly attached to the inner side wall of the drilled hole. The front end outer pipe 321 is provided with a one-way valve III 323, and the outlet of the one-way valve III 323 is arranged inside the front end capsule 322.
The front end inner tube 33 is connected with the front end outer tube female joint 31 through the front end strip-shaped supporting structure 332, the front end strip-shaped supporting structure 332 is attached to the front end outer tube female joint 31 to support a pipeline, and the front end strip-shaped supporting structure 332 is not of an annular structure and does not seal an outer channel eight, so that the front end strip-shaped supporting structure 332 plays a role in supporting the middle inner tube 23.
The front end of the front end inner pipe 33 extends to a position beyond the front end outer pipe capsule 32, the front end inner pipe 33 positioned outside the front end outer pipe capsule 32 is a sieve pipe 334, the sieve pipe 334 is formed by forming a plurality of holes in the side wall of the front end inner pipe 33, and the sieve pipe 334 plays a role in blocking large-particle coal rocks in a drill hole and preventing a gas extraction pipe from being blocked.
The front end inner tube 33 and the rear part of the front end outer tube 321 are sealed through a front end positioning sealing structure 333, and the surface of the front end positioning sealing structure 333 is provided with external threads which can be in threaded connection with the front end outer tube 321, so that the grouting channel is blocked and the inner tube and the outer tube are kept concentric.
The outer channel I, the outer channel II, the outer channel III, the outer channel IV, the outer channel V, the outer channel VI, the outer channel VII, the outer channel VIII and the outer channel IX are connected in series to form a grouting channel.
The utility model discloses a theory of operation does:
(1) The rear end sleeve 1, the middle sleeve 2 and the front end sleeve 3 are respectively placed in a drill rod box of an automatic drilling machine;
(2) The front end casing 3 is taken out by the mechanical arm of the drilling machine and is sent into the holder by the driving drill rod;
(3) The middle casing 2 is taken out by the mechanical arm of the drilling machine and is connected with the front casing 3 by the driving drill rod;
(4) Adding a plurality of middle sleeves 2 as required, wherein the front sleeve 3 and part of the middle sleeves 2 are fed into a drill hole by a drilling machine;
(5) After the middle casing 2 is connected, the mechanical arm of the drilling machine takes out the rear casing 1, and the rear casing is sent into a drill hole by a driving drill rod and connected with the middle casing 2;
(6) Grouting: at the moment, the driving drill rod of the drilling machine is still connected with the rear-end sleeve 1, hole sealing slurry is injected from the center of the outer channel, and the slurry enters a grouting channel formed by the inner pipe and the outer pipe of the hole sealing device. After the grouting pipeline is filled with the grout, the pressure begins to rise until the outlet pressure of the one-way valve I132 and the one-way valve III 323 is reached, the grout simultaneously enters the front end capsule 322 and the rear end capsule 133, the two capsules begin to expand and gradually attach to the inner wall of the drilled hole, and at the moment, the two-time operation in the hole sealing technology of 'two-plugging one-injection' is completed; when the capsule expands to a certain degree, the grouting pressure reaches the outlet pressure of the second one-way valve 151, the slurry starts to enter a space formed by the drill hole and the hole sealing device, the grouting is continued, the slurry is filled in the drill hole, the pressure is maintained continuously, the slurry fully permeates cracks in the drill hole, and at the moment, the 'one injection' in the 'two-plugging one-injection' hole sealing technology is completed.
(7) And withdrawing the driving drill rod, and cleaning the driving drill rod by water.
(8) Gas extraction: and opening the pipe plug 11 to finish gas extraction.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (5)
1. A drilling plugging structure is characterized in that: comprises a rear end inner tube (14), a rear end outer tube female joint (12), a rear end outer tube capsule (13), a rear end grout outlet tube section (15) and a rear end outer tube male joint (16) are sequentially sleeved outside the rear end inner tube (14) from back to front, the rear end outer tube female joint (12) and the rear end inner tube (14) are coaxially fixed, a space formed between the rear end outer tube female joint (12) and the outer wall of the rear end inner tube (14) is an outer channel I, a space formed between the rear end outer tube capsule (13) and the outer wall of the rear end inner tube (14) is an outer channel II, a space formed between the rear end grout outlet tube section (15) and the outer wall of the rear end inner tube (14) is an outer channel III, a space formed between the rear end outer tube male joint (16) and the outer wall of the rear end inner tube (14) is an outer channel IV, the outer channel I, the outer channel II, the outer channel III and the outer channel IV are communicated to form a grouting channel, the rear end inner tube (131) and the rear end outer tube (133) are respectively sleeved on the rear end outer tube (14), a rear end outer tube (131), a rear end expansion valve (133), a rear end outer tube expansion valve (131) is arranged between the rear end inner wall of the rear end outer tube (131), the outlet direction of the one-way valve I (132) is the capsule space I.
2. A borehole plugging structure according to claim 1, wherein: the rear end inner pipe (14) is fixedly connected with the rear end outer pipe female joint (12) through a rear end strip-shaped supporting structure (142), and the rear end strip-shaped supporting structure (142) is clamped into a groove corresponding to the rear end outer pipe female joint (12) to support a pipeline.
3. A borehole plugging structure according to claim 1, wherein: a rear end strip-shaped positioning structure (143) is arranged between the rear end inner tube (14) and the rear end outer tube male connector (16), the rear end strip-shaped positioning structure (143) is clamped in a groove of the rear end outer tube male connector (16), and a gap is reserved between the rear end strip-shaped positioning structures (143).
4. A borehole plugging structure according to claim 1, wherein: the rear part of the rear end inner pipe (14) is provided with a rear end inner pipe female joint (141), and the front part of the rear end inner pipe (14) is provided with a rear end inner pipe male joint (144) used for being connected with other connecting pipelines.
5. A borehole plugging structure according to claim 1, wherein: a second check valve (151) is arranged on the rear pulp outlet pipe section (15), and the outlet direction of the second check valve (151) faces outwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221916937.XU CN217872732U (en) | 2022-07-22 | 2022-07-22 | Drilling plugging structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221916937.XU CN217872732U (en) | 2022-07-22 | 2022-07-22 | Drilling plugging structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217872732U true CN217872732U (en) | 2022-11-22 |
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ID=84055369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221916937.XU Active CN217872732U (en) | 2022-07-22 | 2022-07-22 | Drilling plugging structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217872732U (en) |
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2022
- 2022-07-22 CN CN202221916937.XU patent/CN217872732U/en active Active
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