CN114412425A - Colliery is impact crushing formula boosting joint for screen pipe hydraulic pressure/air transport in pit - Google Patents
Colliery is impact crushing formula boosting joint for screen pipe hydraulic pressure/air transport in pit Download PDFInfo
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- CN114412425A CN114412425A CN202111598806.1A CN202111598806A CN114412425A CN 114412425 A CN114412425 A CN 114412425A CN 202111598806 A CN202111598806 A CN 202111598806A CN 114412425 A CN114412425 A CN 114412425A
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- 239000003245 coal Substances 0.000 claims abstract description 33
- 210000001503 joint Anatomy 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 49
- 238000005553 drilling Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 16
- 230000009471 action Effects 0.000 claims description 10
- 238000003801 milling Methods 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 239000005341 toughened glass Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 11
- 238000004891 communication Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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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
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
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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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention discloses an impact crushing type boosting joint for hydraulic/air conveying of a coal mine underground screen pipe, which is provided with: the connector male end is at least provided with a closed crushing body along the radial direction; the joint female end is axially provided with a breaker; the breaker axially corresponds to the closed breaker body. The impact crushing type boosting joint for the coal mine underground screen pipe hydraulic/air conveying can effectively solve the problems of subsection feeding, connection, communication and successful butt joint of the directional long-drilled large-diameter screen pipe, provides pressure and forward power for the feeding of the subsection large-diameter screen pipe, is effectively connected and communicated, can meet the use requirement of subsection hydraulic/air conveying of the large-diameter screen pipe, greatly increases the feeding length, improves the feeding efficiency, and effectively ensures the gas extraction effect.
Description
Technical Field
The invention belongs to the technical field of hole protection drilling tools for gas extraction drill holes in coal mines, and particularly relates to an impact crushing type boosting joint for hydraulic/air conveying of a coal mine underground screen pipe.
Background
With the increasing of the mining depth and difficulty of coal mines, how to treat and utilize gas is a problem which needs to be solved urgently. The coal mine underground directional long-drilling gas extraction technology is one of important means for controlling gas in a coal mine, has the characteristics of controllable drilling track, large depth, long effective hole section distance and the like, and is widely applied. At present, the method for extracting the gas in the directional drilling of the underground coal mine basically adopts two modes of hole-opening completion extraction and hole-protecting extraction by descending a sieve tube after hole completion, but both the two modes have limitations and influence the gas extraction purity and the extraction time.
As the directional drilling is longer and longer, the probability of drilling in complex strata is greatly increased, and the problems of great loss of negative pressure along the way, blockage of an extraction channel due to collapse of a hole wall and the like exist in the process of extracting the holes by naked eyes. Although the problem of collapse and blockage of a gas extraction channel caused by hole collapse can be effectively solved by a mode of putting the sieve tube hole protecting hole after hole collapse is finished, the whole-section sieve tube arrangement is difficult to realize due to the fact that the directional drilling distance is long and the track is complex. At present, two methods for running the directional long drilling screen pipe are available, one is that the directional drilling is directly run from a naked hole after the final hole is lifted, or the screen pipe is pushed into the hole by using a screen pipe booster. However, the drilling hole is long, the resistance of the naked hole is large, and the sieve tube is easy to push, pull and extrude to be damaged; and the second method is to lower the sieve tube from the inner diameter of the drill rod after the reaming drill is lowered again for rotary reaming, and although the lower resistance is smaller than that of the bare hole, for longer directional drilling, the sieve tube is easy to generate buckling effect, and the sieve tube is still difficult to be lowered to the bottom of the hole. Therefore, the segmented hydraulic conveying technology of the large-diameter sieve tube is developed by Zhang Jinbao and other people of the Middlejie chemical group Xian research institute, and the problems are solved. A method for utilizing a medium to boost and sectionally insert the sieve tube is provided in the patent of the subsection large-diameter sieve tube in the directional long borehole of the underground coal mine and the inserting method thereof, the pushing is changed into the pulling, and a new thought is provided for realizing the efficient and long-distance inserting of the large-diameter sieve tube.
Disclosure of Invention
The invention aims to provide an impact crushing type boosting joint for hydraulic/air conveying of a coal mine underground screen pipe, solves the problems of running-in, connection, communication, signaling and the like of conveying of the coal mine underground directional long-drilled screen pipe, and has the characteristics of simple structure, convenience in operation, easiness in maintenance and the like.
The specific technical scheme comprises the following steps:
an impact crushing type boosting joint for hydraulic/air conveying of a coal mine underground screen pipe is provided with: the connector male end is at least provided with a closed crushing body along the radial direction; the joint female end is axially provided with a breaker; the breaker axially corresponds to the closed breaker body.
Optionally, the joint female end is provided with a female end shell, and a breaker mounting frame is radially arranged in the female end shell; the knapper is axially arranged on the knapper mounting frame, and the end part of the knapper is suspended and extends along the axial direction.
Optionally, the breaker mounting frame is of a ring structure, and is mounted in the female end shell through a threaded structure; one end of the crusher is of a cylindrical structure, and the other end of the crusher is of a thimble structure.
Optionally, the female end housing is embedded with a jaw, and the open end of the jaw is in the same direction as the crushing end of the crusher.
Optionally, a spring is embedded in the female end shell and positioned between the breaker and the jaw.
Optionally, the clamping jaws are multiple, and each clamping jaw is installed through a connecting screw and a torsion spring.
Optionally, the female end shell is formed by butting two sections of tubular structures, and the diameter of the first section of tubular structure is smaller than that of the second section of tubular structure; mounting threads are arranged outside the first section of tubular structure; a plurality of jack catch mounting grooves are set in the outer wall of the second section tubular structure in an embedded mode, and mounting holes are formed in each jack catch mounting groove.
Optionally, the male end of the connector is provided with a male end shell, one end of the male end shell is provided with a guide ring, and a closed crushing body and a retaining ring are radially clamped in the male end shell; the other end of the male end shell is an open end.
Optionally, the closed crushing body is a circular plate structure made of tempered glass.
The invention discloses a method for conveying a coal mine underground screen pipe, which adopts an impact crushing type boosting joint for hydraulic/air conveying of the coal mine underground screen pipe to convey, and specifically comprises the following steps:
a. after the coal mine underground directional drilling is finished, the directional drilling tool is lifted out of the hole, and a sleeve milling drilling tool is put into the hole to perform sleeve milling and drilling to the bottom of the hole;
b. connecting the large-diameter sieve tube into at least two sections, wherein the first section is connected with the female end of the joint and the throttling booster tube, and the second section and the subsequent sieve tube are respectively connected with the male end and the female end of the joint;
c. after the first section of sieve tube is put into the drill rod, connecting drill rod water and starting a water pump or an air compressor, gradually increasing the flow and pressure of the water pump or the air compressor, conveying the first section of sieve tube into the hole to the bottom of the hole by utilizing the action of water power or air, and discharging the water;
d. after a second section of sieve tube is put into a sleeve milling drill rod, connecting drill rod water and starting a water pump or an air compressor, gradually increasing the flow and pressure of the water pump or the air compressor, utilizing water power or air to act on a closed crushing body at the male end of a joint, pushing the whole section of sieve tube to move forwards until the segmented sieve tube is conveyed into a hole to be contacted with a previous section of sieve tube with a large diameter, leading the male end of the joint into the female end of the joint of the previous section of sieve tube by virtue of a guide ring until a breaker is contacted with the closed crushing body, continuously compressing the breaker by the sieve tube at the rear section, and simultaneously buckling a jaw at the female end of the joint of the previous section of sieve tube into an annular groove at the male end of the joint of the next section of sieve tube;
e. if the pressure of the pump pressure or the air compressor is not reduced, the closed crushing body is not crushed, water supply or air compression is stopped, then the water pressure or the air pressure is repeatedly increased for impact again until the pressure of the pump pressure or the air compressor is obviously reduced, the closed crushing body is crushed, the joint is connected, and the two sections of sieve pipes are successfully butted and communicated;
f. and e, repeating the steps d and e, circulating until the last section of large-diameter sieve tube is put in place, lifting all drilling tools in the hole after the last section of large-diameter sieve tube is put in place, and putting the hole inlet pipe to seal the hole to extract gas.
The impact crushing type boosting joint for hydraulic/air conveying of the underground coal mine screen pipe can effectively solve the problems of sectional connection and communication and running-in of the large-diameter screen pipe of the directional long drilled hole, and can provide pressure and forward power for the running-in of the large-diameter screen pipe of the sectional long drilled hole, and can effectively connect and communicate with each other, thereby meeting the use requirement of sectional hydraulic/air conveying of the large-diameter screen pipe, greatly increasing the running-in length, improving the running-in efficiency and effectively ensuring the gas extraction effect.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a cross-sectional view of an impact crushing type boosting joint for hydraulic/air delivery of a coal mine well screen pipe according to the present invention;
FIG. 2 is a schematic view of the female end of the connector of FIG. 1;
FIG. 3 is a schematic structural diagram of an impact crushing type boosting joint for hydraulic/air delivery of a coal mine well screen pipe of the invention installed in a drilling tool;
in the figure, 1-joint female end, 11-female end shell, 111-mounting thread, 112-mounting hole, 113-jaw mounting groove, 12-crusher, 13-crusher mounting rack, 14-jaw, 15-connecting screw, 16-torsion spring, 17-spring, 18-locking nut;
2-connector male end, 21-male end shell, 22-closed crushing body, 23-guide ring and 24-baffle ring;
and 3, sleeving a milling drilling tool.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be described in detail with reference to the accompanying drawings and embodiments, with reference to fig. 1 to 3. A boosting joint for hydraulic/air conveying of a coal mine underground directional long-drilled sieve tube comprises a main body structure, a main body structure and a main body structure, wherein the main body structure consists of a joint male end 2 and a joint female end 1 which are respectively used for connecting a female end and a male end of a large-diameter sieve tube; the male end 2 of the connector and the female end 1 of the connector are connected in a matching way by adopting a claw 14 and an annular groove; the clamping jaw 14 is fixed through a connecting screw 15 and is reset by a torsion spring 16; the male end 2 of the joint is of a central through hole type cylindrical structure, a boss is processed inside the male end for installing the closed crushing body 22, the boss is fixed by a baffle ring 24 and used for sealing water (air), building pressure and providing power to drive the boosting large-diameter sieve tube to move towards the bottom of a hole; a guide ring 23 is arranged in front of the male end 2 of the connector and used for guiding the two sections of large-diameter sieve tubes in the holes; a breaker mounting frame 13 and a locking nut 18 are arranged in the joint female end 1 and are used for fixing a breaker 12; when the male end 2 of the joint is driven to the female end 1 of the joint through water pressure (air pressure), namely the closed crushing body 22 moves to contact with the crusher 12, the jaw 14 is clamped into the annular groove of the male end 2 of the joint until the crusher 12 breaks through the closed crushing body 22 under the action of the water pressure (air pressure), so that the connection of the two joints is completed, and the center of the whole section of the large-diameter sieve tube is communicated; by adopting the method, the large-diameter sieve tube is connected through the boosting joint and is lowered section by section, and finally the gas extraction channel of the directional long drill hole is formed.
The screen pipe boosting joint is divided into two ends which are respectively arranged on the two sides of the sectional large-diameter screen pipe. The concrete structure comprises:
the male end 2 of the connector is provided with a male end shell 21, the right side of the male end shell 21 is processed into an internal thread, namely an open end, the male end shell can be connected with a sieve tube, the outer end of the left side of the male end shell 21 is processed into a tubular annular groove with gradually increased diameter and used for being connected with the claw 14 of the female end 1 in a grabbing and buckling mode, the inner end of the left side is processed into an internal thread and connected with a guide ring 23, and the internal thread and a limiting step are processed on the inner side of the male end 2 of the connector and used for blocking a ring 24 to install and sealing a crushing body 22 respectively.
The retainer ring 24 is of an annular structure, the outer side of the retainer ring is processed into threads and is installed in the male end shell 21, and the left side of the retainer ring is used for fixing and sealing the crushing body 22. The left side of the guide ring 23 is of a conical structure, the conical size is in butt joint with the limit position of the male end and the female end of the connector, the limit position is as shown in figure 3, and the right side of the guide ring is processed into an external thread and matched with the male end shell 21.
The closed crushing body 22 is a disk structure made of toughened glass and is arranged in the male end shell 21 to realize sealing and establish water pressure (air pressure), power is provided to drive the segmented large-diameter sieve tube to move forward, after the butt joint of the male end and the female end of the joint is completed, the closed crushing body 22 is crushed by the crusher 12, and crushed slag particles are discharged out of the hole along with water flow (air flow).
The closed crushing body 22 has the functions of establishing pressure, providing power and connecting and communicating after being crushed by the crusher, and the working principle is as follows: the joint male end 2 is connected with the whole-end large-diameter sieve tube and builds pressure for the whole-end sieve tube under the action of water pressure (air pressure) so as to provide power to push the whole-section sieve tube to move forwards until the whole-section sieve tube is conveyed into a hole to be contacted with the previous section large-diameter sieve tube, at the moment, the joint male end 2 is guided into the joint female end 1 of the previous section sieve tube by virtue of the guide ring 23 until the crusher 12 is contacted with the closed crushing body 22, the crusher 12 is continuously compressed by the later section sieve tube, and meanwhile, the clamping jaws 14 of the joint female end 1 of the previous section sieve tube are buckled into the annular groove of the joint male end 2 of the next section sieve tube. The closed crushing body 22 is instantaneously crushed as the compression amount of the crusher 12 reaches the limit, at this time, the two sections of large direct sieve pipes are connected and form a central through with the previous section of large diameter sieve pipe, the closed crushing body 22 becomes particles, and the particles are discharged out of the hole along with the discharged water flow (air flow).
The joint female end 1 is provided with a female end shell 11, the left side of the female end shell 11 is provided with an external thread, namely an installation thread 111, a sieve tube can be connected, four cuboid grooves and threaded holes are evenly distributed on a right pipe body, namely a jaw installation groove 113 and an installation hole 112, for installing a jaw 14 and a connecting screw 18, the inner side of the pipe body is provided with an internal thread, and the internal thread is connected with a breaker installation frame 13. The lock nut 18 has an annular structure, is threaded on the inside, and is connected to the breaker 12, and is connected to the breaker mounting bracket 13 on the right side, for fixing the breaker 12. The breaker mounting bracket 13 is of an annular structure, a threaded hole is machined in the center of the breaker mounting bracket for mounting the breaker 12, and an external thread is machined on the outer side of the breaker mounting bracket and is matched and connected with an internal thread of the female end shell 11. The jaws 14 are divided into four groups, holes are formed in the left side of the jaws and connected with four rectangular jaw mounting grooves 113 in the female housing 11 through connecting screws 15, and two grippers are formed in the right side of the jaws and used for gripping and fastening annular grooves in the end portion of the male housing 21. And a torsion spring 16 is arranged between the jaw 14 and the connecting screw 15, and the torsion spring 16 is used for resetting the jaw 14 when the male end and the female end of the connector are butted. The spring 17 is arranged in a hole arranged in the female end shell 11, the spring 17 is positioned in the female end shell 11 between the crusher 12 and the clamping jaws 14, and the spring 17 is used for a resetting function when the phenomenon that the closed crushing body 22 is not crushed by the crusher 12 occurs in joint butt joint.
The spring 17 has a sliding reset function, and the working principle is as follows: the female end shell 11 is internally provided with a spring 17 with a reset function, and the whole joint connection process has a sliding reset function. When the phenomenon that the breaker 12 does not break the closed breaker body 22 occurs in butt joint of the joints, the male end 2 of the joint can automatically rebound under the action of the spring 17 to recover the compression amount, the breaker 12 can be compressed again under the secondary action of hydraulic power (air pressure), and the process is repeated until the closed breaker body 22 is broken successfully, so that the joints are connected, and the two sieve pipes are communicated, thereby ensuring the connection success rate and high efficiency of the two large-diameter sieve pipes.
The invention relates to a boosting joint for hydraulic/air conveying of a directional long borehole screen pipe under a coal mine and a use method thereof, and a position reporting technology, wherein the working principle is as follows:
when two sections of large-diameter sieve tubes are butted, the closed crushing body 22 is crushed by the crusher 12 to realize the communication of the two sections of sieve tubes, and the connection of the connected single sieve tubes is realized by the catching of the clamping jaws 14. There is a problem here as to whether or not the through-connection is successful and the connection is successful. After the screen pipe is put into a drill pipe, connecting drill pipe water and starting a water pump (air compressor), gradually increasing the flow and pressure of the water pump (air compressor) to convey the segmented screen pipe into the hole by utilizing the action of water power (air pressure), gradually increasing the flow and pressure provided by the water pump (air compressor) to utilize the action of water power (air pressure), enabling the water power to act on the closed crushing body 22 of the joint male end 2 to push the whole screen pipe to move forwards until the segmented screen pipe is conveyed into the hole to be in contact with the previous section of large-diameter screen pipe, guiding the joint male end 2 into the joint female end 1 of the previous section of screen pipe by virtue of a guide ring until the crusher 12 is in contact with the closed crushing body 22, continuously compressing the crusher 12 by the rear section of screen pipe, and simultaneously buckling the clamping jaws 14 of the joint female end 1 of the previous section of screen pipe into the annular grooves of the joint male end 2 of the next section of screen pipe. The closed crushing body 22 is instantaneously hit when the compression amount of the crusher 12 reaches the limit to be excited, if crushing is successful, the claw 14 can smoothly catch the annular groove of the male end connector 2, if crushing is not successful, the spring 17 can rebound to the upper sieve tube, the water pressure (air pressure) and the flow are increased at the moment, the process of secondarily compressing the crusher is carried out, the process is repeated until the closed crushing body 22 is crushed, and the two sieve tubes are connected. Here, it is necessary to perform a hole bottom notification according to the pressure change of the pump to determine whether the connection is successful. When advancing through pumping pressure and discharge (compressed air) effect propulsion screen pipe and advancing, pumping pressure (air compressor machine pressure) can rise rapidly under the unchangeable condition of water (air) flow, and pumping pressure (air compressor machine pressure) realize stably when the screen pipe steadily advances, and when carrying out breaker 12 compression, pumping pressure (air compressor machine pressure) can rise to the biggest. When the closed crushing body 22 is not crushed, the pump pressure (air compressor pressure) is continuously shaken; after the closed crushing body 22 is crushed, the water pressure (air pressure) can suddenly drop because the pump volume (air flow) is not changed and the pipe is communicated, and the successful alarm judgment of the connection of the sieve pipe is realized by observing the instantaneous drop of the pump pressure.
The invention also discloses a method for conveying the screen pipe under the coal mine, which specifically comprises the following steps:
a. after the coal mine underground directional drilling is finished, the directional drilling tool is lifted out of the hole, and a sleeve milling drilling tool 3 is put into the hole to perform sleeve milling and drilling to the bottom of the hole;
b. connecting the large-diameter sieve tube into at least two sections, wherein the first section is connected with a joint female end 1 and a throttling booster tube, and the second section and the subsequent sieve tube are respectively connected with a joint male end 1 and a joint female end 2;
c. after the first section of sieve tube is put into the drill rod, connecting the water in the drill rod and starting a water pump (air compressor), gradually increasing the flow and pressure of the water pump (air compressor), conveying the first section of sieve tube into the hole to the bottom of the hole by utilizing the action of water power (compressed air), and discharging the water;
d. after a second section of sieve tube is put into a sleeve milling drill rod, connecting drill rod water and starting a water pump (air compressor), gradually increasing the flow and pressure of the water pump (air compressor), utilizing the hydraulic action on a closed crushing body 22 of a joint male end 2 to push the whole section of sieve tube to move forwards until the segmented sieve tube is conveyed into a hole to be contacted with a previous section of large-diameter sieve tube, leading the joint male end 2 into a joint female end 1 of the previous section of sieve tube by virtue of a guide ring 23 at the moment, until a crusher 12 is contacted with the closed crushing body 22, continuously compressing the crusher 12 by the later section of sieve tube, and simultaneously buckling a jaw 14 of the joint female end 1 of the previous section of sieve tube into an annular groove of the joint male end 2 of the next section of sieve tube;
e. if the pump pressure (air compressor pressure) is not reduced, the closed crushing body 22 is not crushed, water supply (compressed air) is stopped, then the water pressure (air pressure) is repeatedly increased for impact again until the pump pressure (air compressor pressure) is obviously reduced, the closed crushing body 22 is crushed, the joints are connected, and the two sections of sieve pipes are successfully butted and communicated;
f. and e, repeating the steps d and e, circulating until the last section of large-diameter sieve tube is put in place, lifting all drilling tools in the hole after the last section of large-diameter sieve tube is put in place, and putting the hole inlet pipe to seal the hole to extract gas.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. The utility model provides a colliery is broken formula boosting joint of impact for screen pipe hydraulic pressure/air transport in pit which characterized in that sets up:
the connector male end (2), the connector male end (2) is at least provided with a closed crushing body (22) along the radial direction;
the joint female end (1) is axially provided with a knapper (12) along the joint female end (1);
the breaker (12) is axially corresponding to the closed breaker body (22).
2. The impact crushing type boosting joint for conveying the hydraulic force/air of the coal mine underground screen pipe according to claim 1, wherein a female end shell (11) is arranged at the female end (1) of the joint, and a crusher mounting frame (13) is radially arranged in the female end shell (11);
the crusher (12) is axially installed on the crusher mounting frame (13), and the end part of the crusher (12) is suspended and extends along the axial direction.
3. The coal mine underground screen pipe hydraulic/air conveying impact crushing type boosting joint as claimed in claim 2, wherein the crusher mounting frame (13) is of a ring structure, and the crusher mounting frame (13) is mounted in the female end shell (11) through a threaded structure;
one end of the knapper (12) is of a cylindrical structure, and the other end of the knapper (12) is of a thimble structure.
4. The impact crushing type boosting joint for coal mine well screen pipe hydraulic/air conveying according to claim 2 or 3, characterized in that a jaw (14) is embedded on the female end shell (11), and the open end of the jaw (14) is in the same direction as the crushing end of the crusher (12).
5. The impact breaking type boosting joint for coal mine well screen pipe hydraulic/air transportation according to claim 4, characterized in that a spring (17) is embedded in the female end housing (11), and the spring (17) is positioned between the breaker (12) and the jaw (14).
6. The impact breaking type boosting joint for coal mine well screen pipe hydraulic/air conveying according to claim 4, characterized in that the clamping jaws (14) are multiple, and each clamping jaw (14) is installed through a connecting screw (15) and a torsion spring (16).
7. The impact crushing type boosting joint for the hydraulic/air conveying of the coal mine well screen pipe as claimed in claim 2 or 3, wherein the female end shell (11) is formed by butt joint of two sections of tubular structures, and the diameter of the first section of tubular structure is smaller than that of the second section of tubular structure;
and a mounting thread (111) is arranged outside the first section of tubular structure; a plurality of jack catch mounting grooves (113) are set in the outer wall of the second section of tubular structure, and mounting holes (112) are set in each jack catch mounting groove (113).
8. The impact crushing type boosting joint for the hydraulic/air conveying of the coal mine well screen pipe as claimed in claim 1, 2 or 3, wherein the male end (2) of the joint is provided with a male end shell (21), one end of the male end shell (21) is provided with a guide ring (23), and a closed crushing body (22) and a retaining ring (24) are radially clamped in the male end shell (21);
the other end of the male end shell (21) is an open end.
9. The impact crushing type boosting joint for the hydraulic/air conveying of the coal mine underground screen pipe according to claim 8, wherein the closed crushing body (22) is of a round plate structure made of toughened glass.
10. The method for conveying the screen pipe under the coal mine is characterized in that the impact crushing type boosting joint for conveying the screen pipe under the coal mine according to any one of claims 1 to 9 is adopted for conveying, and the method specifically comprises the following steps:
a. after the coal mine underground directional drilling is finished, the directional drilling tool is lifted out of the hole, and a sleeve milling drilling tool (3) is put into the hole to perform sleeve milling drilling to the bottom of the hole;
b. connecting the large-diameter sieve tube into at least two sections, wherein the first section is connected with the joint female end (1) and the throttling booster tube, and the second section and the subsequent sieve tube are respectively connected with the joint male end (1) and the joint female end (2);
c. after the first section of sieve tube is put into the drill rod, connecting drill rod water and starting a water pump or an air compressor, gradually increasing the flow and pressure of the water pump or the air compressor, conveying the first section of sieve tube into the hole to the bottom of the hole by utilizing the action of water power or air, and discharging the water;
d. after a second section of sieve tube is put into a sleeve milling drill rod, connecting drill rod water and starting a water pump or an air compressor, gradually increasing the flow and pressure of the water pump or the air compressor, utilizing water power or air to act on a closed crushing body (22) at a joint male end (2), pushing the whole section of sieve tube to move forwards until the sectional sieve tube is conveyed into a hole to be contacted with a previous section of sieve tube with a large diameter, leading the joint male end (2) into a joint female end (1) of the previous section of sieve tube by a guide ring (23) until a crusher (12) is contacted with the closed crushing body (22), continuously compressing the crusher (12) by the later section of sieve tube, and simultaneously buckling a jaw (14) of the joint female end (1) of the previous section of sieve tube into an annular groove of the joint male end (2) of the next section of sieve tube;
e. if the pressure of the pump pressure or the air compressor is not reduced, the closed crushing body (22) is not crushed, water supply or air compression is stopped, then water pressure or air pressure is repeatedly increased for impact again until the pressure of the pump pressure or the air compressor is obviously reduced, the closed crushing body (22) is crushed, the joints are connected, and the two sections of sieve pipes are successfully butted and communicated;
f. and e, repeating the steps d and e, circulating until the last section of large-diameter sieve tube is put in place, lifting all drilling tools in the hole after the last section of large-diameter sieve tube is put in place, and putting the hole inlet pipe to seal the hole to extract gas.
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| CN114837630A (en) * | 2022-05-26 | 2022-08-02 | 中煤科工集团西安研究院有限公司 | Coal mine underground broken soft coal seam directional long drilling fast screening system and method |
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