CN110645038A - Drilling and hole washing integrated device for coal mine gas extraction - Google Patents
Drilling and hole washing integrated device for coal mine gas extraction Download PDFInfo
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- CN110645038A CN110645038A CN201910914365.8A CN201910914365A CN110645038A CN 110645038 A CN110645038 A CN 110645038A CN 201910914365 A CN201910914365 A CN 201910914365A CN 110645038 A CN110645038 A CN 110645038A
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- 238000005406 washing Methods 0.000 title claims abstract description 95
- 238000005553 drilling Methods 0.000 title claims abstract description 89
- 238000000605 extraction Methods 0.000 title claims abstract description 33
- 239000003245 coal Substances 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims abstract description 6
- 239000002826 coolant Substances 0.000 claims description 17
- 239000000110 cooling liquid Substances 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 239000007921 spray Substances 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- 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
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
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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
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a drilling and hole washing integrated device for coal mine gas extraction, which can conveniently realize the switching between drilling and hole washing, and when a high-pressure hole washing pipe is connected with a hole washing high-pressure injection liquid supply pump, a high-pressure hole washing medium can enable the front end of a high-pressure nozzle to extend out of the front end of a drill bit through an adjusting and protecting assembly so as to inject the high-pressure medium to wash holes; when the drilling motor performs drilling operation, the high-pressure nozzle can be hidden in the inner cavity of the drill bit by adjusting the protection assembly under the action of external pressure so as to protect the high-pressure nozzle, the drilling and hole washing efficiency is effectively improved, and the drilling and hole washing operation for gas extraction of a coal mine is facilitated.
Description
Technical Field
The invention relates to the technical field of gas extraction, in particular to a drilling and hole washing integrated device for coal mine gas extraction.
Background
The gas accident is one of the most serious disaster accidents in the coal mine safety production in China, when the gas emission quantity in a coal mine is very large and is difficult to dilute and remove by ventilation, a drilling drainage method is required to remove the gas and reduce the ventilation burden, and drilling equipment is required to be used for drilling. At the present stage, common drilling equipment in China firstly drills holes, then an extraction pipe is stretched into the drilled holes, and extraction operation is carried out by the extraction pipe. However, for some soft rocks, the problem of blockage of a drill hole often occurs in extraction, once the drill hole is blocked, the drill hole is only treated by a drill bit and is difficult to clean, and hole washing equipment is needed for hole washing. However, the existing hole washing equipment and the existing drilling equipment are generally arranged separately, and are inconvenient to use, for example, when the hole washing equipment is blocked by hard rock, the hole washing equipment is low in cleaning efficiency, and the drilling equipment is difficult to clean soft rock or granular slag, so that the hole washing efficiency and the drilling efficiency are low, and the gas extraction efficiency is influenced.
Therefore, the invention provides a drilling and hole washing integrated device for coal mine gas extraction, and aims to solve the problems in the background art.
Disclosure of Invention
The invention aims to provide a drilling and hole washing integrated device for coal mine gas drainage, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a drilling and hole washing integrated device for coal mine gas extraction comprises a drilling and hole washing advancing track, a drilling motor, a drill rod and a drill bit, wherein an advancing slider is fixedly connected to the drilling motor, the advancing slider is movably arranged along the drilling and hole washing advancing track, the output end of the drilling motor is connected with the drill rod, and the drill bit is coaxially and fixedly connected to the front end of the drill rod; it is characterized in that the preparation method is characterized in that,
a sleeve is further sleeved at a position, close to the drilling motor, outside the drill rod, at least one high-pressure hole washing pipe is arranged on the sleeve, and a high-pressure joint seat is further arranged on the drill rod corresponding to the high-pressure hole washing pipe;
the high-pressure hole washing pipe can axially move so as to realize the communication and disconnection operation with the high-pressure joint seat;
a center hole is formed in the center of the drill rod, and an inner high-pressure cavity of the high-pressure joint seat is communicated with the center hole;
the interior of the front end of the drill bit is also provided with a high-pressure nozzle, and the high-pressure nozzle is arranged in the inner cavity of the drill bit through an adjusting and protecting component; and is
When the high-pressure hole washing pipe is connected with a hole washing high-pressure injection liquid supply pump, high-pressure hole washing media can enable the front end of the high-pressure nozzle to extend out of the front end of the drill bit through the adjusting and protecting assembly so as to inject the high-pressure media to wash holes;
when the drilling motor is used for drilling, the high-pressure nozzle can be hidden in the inner cavity of the drill bit through the adjusting protection assembly under the action of external pressure, so that the high-pressure nozzle is protected.
Further, as preferred, the inner center of the front end of the drill bit is provided with a containing hole, the inner cavity of the front end of the drill bit is communicated with the containing hole, the adjusting protection component comprises an adjusting limiting seat, a high-pressure resistant elastic taper sleeve and a flexible connecting sheet, wherein the high-pressure nozzle is positioned in the containing hole, the front end of the high-pressure nozzle can extend out of the containing hole, the rear end of the high-pressure nozzle is connected with the adjusting limiting seat, the center of the adjusting limiting seat is provided with a hole washing medium through hole communicated with the high-pressure nozzle, the adjusting limiting seat can axially move and is limited in the inner cavity, the cross-sectional area of the adjusting limiting seat is larger than that of the containing hole, one end of the adjusting limiting seat, far away from the high-pressure nozzle, is provided with the high-pressure resistant elastic taper sleeve, and the outer wall of the high-pressure, the end part of the high-pressure resistant elastic taper sleeve is fixedly connected with the end wall of the inner cavity far away from the high-pressure nozzle through the flexible connecting sheet.
Further, as preferred, the inner chamber is the toper structure, and the tip of toper structure is for facing one side of high pressure nozzle, the toper structure of high pressure resistant elasticity taper sleeve with the toper structure looks adaptation of inner chamber, the position that corresponds on the inner wall of inner chamber high pressure resistant elasticity taper sleeve still is provided with the circumference recess, be provided with the sealing washer in the circumference recess.
Further, preferably, when a high-pressure hole washing medium flows to the high-pressure nozzle, the high-pressure hole washing medium can enable the annular wall of the high-pressure resistant elastic taper sleeve to abut against the inner cavity, and meanwhile, the adjusting limit seat moves towards the front end of the drill bit, so that the high-pressure nozzle extends out of the front end of the drill bit.
Further, preferably, the high-pressure joint seat is integrally fixed at the rear end of the drill rod, a medium channel is arranged in the high-pressure joint seat, the outer end of the high-pressure joint seat faces towards one end of the high-pressure hole washing pipe, the medium channel is communicated with the high-pressure joint and the central hole of the drill rod, and the end of the high-pressure hole washing pipe is detachably connected to the high-pressure joint through threads.
Further, preferably, a drill bit cooling liquid supply assembly is further arranged on the sleeve at a position close to the drilling motor, the drill bit cooling liquid supply assembly is connected with a cooling liquid pump, and the drill bit cooling liquid supply assembly is communicated with the central hole of the drill rod.
Further, as preferred, the drill bit coolant supply subassembly includes outer cover seat, drive spindle, coolant liquid chamber and intercommunicating pore, wherein, outer cover seat adopts bearing and the cover that rotatory sealing washer can rotate relatively to establish drive spindle's outside, drive spindle's one end with the tip transmission of drilling rod is connected, drive spindle's the other end is connected to drilling motor, drive spindle's one end is provided with the coolant liquid chamber of blind hole structure, outer cover seat's inner wall with between the periphery wall of drive spindle construct establish into with the intercommunication chamber of coolant liquid pump, the intercommunication chamber with adopt the setting between the coolant liquid chamber be in drive spindle radial direction's a plurality of intercommunicating pores intercommunication, the intercommunication chamber passes through the connector and is connected with the coolant liquid pump.
Preferably, one end of the drilling motor, which is far away from the drill rod, is connected with a travel driving seat, the travel driving seat is connected with a travel driving and feeding mechanism, the travel driving and feeding mechanism is a hydraulic cylinder, an air cylinder or a screw-nut mechanism, the output end of the drilling motor is connected with a speed reduction controller, and the output end of the speed reduction controller is connected with the driving spindle.
Further, preferably, a plurality of driving tooth shoulders in a circumferential array are arranged in the blind hole structure of the driving main shaft, a plurality of driving tooth grooves in a circumferential array are arranged on the outer circumference of the end part of the drill rod, and the driving tooth shoulders and the driving tooth grooves are matched and clamped into the transmission connection.
Further, as preferred, the front end of high pressure hole-washing pipe is fixed on the mount pad, the mount pad cover is established the outside of drilling rod, just the safety cover that is fixed with the toper structure is still established to the outside of mount pad cover, the outside of drill bit is provided with helical structure's drill bit.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the switching between drilling and hole washing can be conveniently realized, and the multifunctional use of drilling and hole washing can be realized, and when the high-pressure hole washing pipe is connected with the hole washing high-pressure injection liquid supply pump, a high-pressure hole washing medium can enable the front end of the high-pressure nozzle to extend out of the front end of the drill bit through the adjusting and protecting assembly so as to inject the high-pressure medium to wash the hole; when the drilling motor performs drilling operation, the high-pressure nozzle can be hidden in the inner cavity of the drill bit through the adjusting and protecting assembly under the action of external pressure so as to be protected, the drilling and hole washing efficiency is effectively improved, and the drilling and hole washing operation for gas extraction in a coal mine is facilitated.
Drawings
FIG. 1 is a schematic overall structure diagram of a drilling and hole washing integrated device for coal mine gas extraction;
FIG. 2 is a schematic structural diagram of a drill rod in the drilling and hole washing integrated device for coal mine gas extraction;
FIG. 3 is a schematic sectional view A-A of FIG. 2;
FIG. 4 is a schematic structural diagram of a coal mine gas extraction drilling and hole washing integrated device when a high-pressure nozzle of an adjusting protection assembly extends out;
FIG. 5 is a schematic structural diagram of a coal mine gas extraction drilling and hole washing integrated device when a high-pressure nozzle of an adjusting protection assembly is hidden;
FIG. 6 is a schematic structural diagram of a buckle in the drilling and hole washing integrated device for coal mine gas extraction;
FIG. 7 is a schematic structural diagram of a front semi-ring in the drilling and hole washing integrated device for coal mine gas extraction.
FIG. 8 is a schematic structural diagram of a high-pressure hole washing pipe in a drilling and hole washing integrated device for coal mine gas extraction.
Detailed Description
Referring to fig. 1 to 8, in the embodiment of the invention, a drilling and hole washing integrated device for coal mine gas extraction comprises a drilling and hole washing advancing track 11, a drilling motor 1, a drill rod 9 and a drill bit 7, wherein the drilling motor 1 is fixedly connected with an advancing slider 3, the advancing slider is movably arranged along the drilling and hole washing advancing track 11, the output end of the drilling motor is connected with the drill rod 9, and the front end of the drill rod is coaxially and fixedly connected with the drill bit 7; the drilling machine is characterized in that a sleeve 10 is further sleeved at a position, close to the drilling motor, outside the drill rod, at least one high-pressure hole washing pipe 5 is arranged on the sleeve, and a high-pressure joint seat 14 is further arranged at a position, corresponding to the high-pressure hole washing pipe, on the drill rod; the high-pressure hole washing pipe can axially move so as to realize the communication and disconnection operation with the high-pressure joint seat; a central hole 13 is formed in the center of the drill rod, and an inner high-pressure cavity of the high-pressure joint seat is communicated with the central hole; a high-pressure nozzle 28 is further arranged in the front end of the drill bit 7, and the high-pressure nozzle 28 is installed in the inner cavity 23 of the drill bit through an adjusting and protecting assembly; and is
When the high-pressure hole washing pipe is connected with a hole washing high-pressure injection liquid supply pump, high-pressure hole washing media can enable the front end of the high-pressure nozzle 28 to extend out of the front end of the drill bit through the adjusting and protecting assembly so as to inject the high-pressure media to wash holes;
when the drilling motor is used for drilling, the high-pressure nozzle can be hidden in the inner cavity of the drill bit through the adjusting protection assembly under the action of external pressure, so that the high-pressure nozzle is protected.
In this embodiment, the inner center of the front end of the drill 7 is provided with a receiving hole 27, the front end inner cavity 23 of the drill is communicated with the receiving hole 27, the adjusting protection component comprises an adjusting limiting seat 24, a high pressure resistant elastic taper sleeve 26 and a flexible connecting sheet 25, wherein the high pressure nozzle is located in the receiving hole, the front end of the high pressure nozzle can extend out of the receiving hole, the rear end of the high pressure nozzle is connected with the adjusting limiting seat, the center of the adjusting limiting seat is provided with a hole washing medium through hole communicated with the high pressure nozzle, the adjusting limiting seat is axially movable and limited in the inner cavity, the cross-sectional area of the adjusting limiting seat is larger than that of the receiving hole, one end of the adjusting limiting seat far away from the high pressure nozzle is provided with the high pressure resistant elastic taper sleeve 26, and the outer wall of the high pressure resistant elastic taper sleeve 26 can be tightly attached to the inner cavity inner wall, the end part of the high pressure resistant elastic taper sleeve 26 is connected and fixed on the end wall of the inner cavity far away from the high pressure nozzle through the flexible connecting sheet.
As a preferred embodiment, the inner cavity is a tapered structure, the small end of the tapered structure faces one side of the high-pressure nozzle, the tapered structure of the high-pressure resistant elastic taper sleeve 26 is matched with the tapered structure of the inner cavity, a circumferential groove is further formed in the inner wall of the inner cavity at a position corresponding to the high-pressure resistant elastic taper sleeve, and a sealing ring 29 is arranged in the circumferential groove.
When high-pressure hole washing media flow to the high-pressure nozzle, the high-pressure hole washing media can enable the annular wall of the high-pressure resistant elastic taper sleeve 26 to abut against the inner cavity, and meanwhile, the adjusting limiting seat moves towards the front end of the drill bit, so that the high-pressure nozzle extends out of the front end of the drill bit.
In the invention, the high-pressure joint seat 14 is integrally fixed at the rear end of the drill rod, a medium channel is arranged in the high-pressure joint seat, a high-pressure joint 15 is arranged at one end, facing the high-pressure hole washing pipe 5, of the outer end of the high-pressure joint seat, the medium channel is communicated with the high-pressure joint and the central hole 13 of the drill rod, and the end part 53 of the high-pressure hole washing pipe 5 is detachably connected to the high-pressure joint by threads.
A drill bit cooling liquid supply assembly is further arranged on the sleeve 10 and close to the drilling motor, the drill bit cooling liquid supply assembly is connected with a cooling liquid pump, and the drill bit cooling liquid supply assembly is communicated with the central hole 13 of the drill rod.
The drill bit coolant supply assembly comprises an outer sleeve seat 17, a driving spindle 18, a coolant cavity 22 and communicating holes 21, wherein the outer sleeve seat 17 is sleeved with a bearing and a rotary sealing ring in a relatively rotating mode and is arranged outside the driving spindle, one end of the driving spindle is in transmission connection with the end of a drill rod, the other end of the driving spindle is connected to the drilling motor, the coolant cavity with a blind hole structure is formed in one end of the driving spindle, a communicating cavity is formed between the inner wall of the outer sleeve seat and the peripheral wall of the driving spindle and is communicated with the coolant pump, the communicating cavity is communicated with the coolant cavity through the communicating holes in the radial direction of the driving spindle, and the communicating cavity is connected with the coolant pump through a connecting outer joint 19.
One end of the drilling motor, which is far away from the drill rod, is connected with a traveling driving seat 8, the traveling driving seat is connected with a traveling driving and feeding mechanism, the traveling driving and feeding mechanism is a hydraulic cylinder, an air cylinder or a screw rod nut mechanism, the output end of the drilling motor is connected with a speed reduction controller 2, and the output end of the speed reduction controller 2 is connected with the driving spindle 18.
The blind hole structure of the driving main shaft is internally provided with a plurality of driving tooth shoulders 20 in a circumferential array, the outer circumference of the end part of the drill rod is provided with a plurality of driving tooth grooves in a circumferential array, and the driving tooth shoulders 20 are matched with the driving tooth grooves to be clamped into the driving connection.
The front end of the high-pressure hole washing pipe 5 is fixed on the mounting seat 16, the mounting seat is sleeved on the outer portion of the drill rod, the protective cover 6 fixed with a conical structure is further sleeved on the outer portion of the mounting seat 16, and a drill blade of a spiral structure is arranged on the outer portion of the drill bit.
In order to realize the installation, the dismantlement and fixed of high-pressure wash the downthehole pipe 5, high-pressure wash the downthehole pipe 5 and include metal spray tube 51, the one end fixedly connected with barb bayonet 52 of metal spray tube 51, the other end of metal spray tube 51 is connected with threaded connection section 53 through the screw thread embedding. Meanwhile, in the invention, the high-pressure hole washing pipe 5 is fixed on the high-pressure joint seat 14 by adopting the buckle 4, the buckle 4 comprises the front semi-ring sheet 41, the rear semi-ring sheet 42 is arranged at the rear end of the front semi-ring sheet 41, the bolts 43 are respectively arranged at the two ends of the connection part of the front semi-ring sheet 41 and the rear semi-ring sheet 42 in a penetrating way, and the front semi-ring sheet 41 and the rear semi-ring sheet 42 have the same structure, so that the buckle 4 can be fixed on the sleeve 10, the high-pressure spray pipe assembly 5 can be fixed at the same time, and the stability of the high-pressure. The front half ring 41 includes a first half ring 411, both ends of the first half ring 411 are fixedly connected with a second half ring 412, and a bolt hole 413 is formed at the front side of one end of the second half ring 412, so that the high pressure nozzle assembly 5 can be stably fixed, and the high pressure water pipe connected with the high pressure nozzle assembly 5 is prevented from affecting the drilling operation of the drill. The sleeve 10 is located inside the first half ring 411, the metal nozzle 51 is located inside the second half ring 412, and both the sleeve 10 and the metal nozzle 51 are fixed to the inner sides of the front half ring plate 41 and the rear half ring plate 42, so that the metal nozzle 51 and the threaded connection section 53 of the high pressure nozzle assembly 5 can be detached and installed separately, and thus can be cleaned conveniently. The lower end of the metal nozzle 51 penetrates through the inner side of the positioning hole, the threaded connection section 53 is positioned on the inner side of the horn housing, and the barb bayonet 52 is connected with an external high-pressure water pipe, so that the threaded connection section 53 can be mounted and dismounted on the horn housing.
According to the invention, the switching between drilling and hole washing can be conveniently realized, and the multifunctional use of drilling and hole washing can be realized, and when the high-pressure hole washing pipe is connected with the hole washing high-pressure injection liquid supply pump, a high-pressure hole washing medium can enable the front end of the high-pressure nozzle to extend out of the front end of the drill bit through the adjusting and protecting assembly so as to inject the high-pressure medium to wash the hole; when the drilling motor performs drilling operation, the high-pressure nozzle can be hidden in the inner cavity of the drill bit through the adjusting and protecting assembly under the action of external pressure so as to be protected, the drilling and hole washing efficiency is effectively improved, and the drilling and hole washing operation for gas extraction in a coal mine is facilitated.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (10)
1. A drilling and hole washing integrated device for coal mine gas extraction comprises a drilling and hole washing advancing track (11), a drilling motor (1), a drill rod (9) and a drill bit (7), wherein the drilling motor (1) is fixedly connected with an advancing slider (3), the advancing slider is movably arranged along the drilling and hole washing advancing track (11), the output end of the drilling motor is connected with the drill rod (9), and the drill bit (7) is coaxially and fixedly connected to the front end of the drill rod; it is characterized in that the preparation method is characterized in that,
a sleeve (10) fixed on the frame is further sleeved outside the drill rod at a position close to the drilling motor, a spacing cavity is formed between the sleeve and the drill rod, at least one high-pressure hole washing pipe (5) is arranged on the sleeve, and a high-pressure joint seat (14) is further arranged on the drill rod at a position corresponding to the high-pressure hole washing pipe;
the high-pressure hole washing pipe can axially move so as to realize the communication and disconnection operation with the high-pressure joint seat;
a central hole (13) is formed in the center of the drill rod, and an inner high-pressure cavity of the high-pressure joint seat is communicated with the central hole;
a high-pressure nozzle (28) is further arranged inside the front end of the drill bit (7), and the high-pressure nozzle (28) is installed in an inner cavity (23) of the drill bit through an adjusting and protecting assembly; and is
When the high-pressure hole washing pipe is connected with a hole washing high-pressure injection liquid supply pump, high-pressure hole washing media can enable the front end of the high-pressure nozzle (28) to extend out of the front end of the drill bit through the adjusting and protecting assembly so as to inject the high-pressure media to wash holes;
when the drilling motor is used for drilling, the high-pressure nozzle can be hidden in the inner cavity of the drill bit through the adjusting protection assembly under the action of external pressure, so that the high-pressure nozzle is protected.
2. The drilling and hole washing integrated device for coal mine gas extraction according to claim 1, wherein a receiving hole (27) is formed in the center of the front end of the drill bit (7), a front end inner cavity (23) of the drill bit is communicated with the receiving hole (27), the adjusting and protecting component comprises an adjusting and limiting seat (24), a high-pressure-resistant elastic taper sleeve (26) and a flexible connecting sheet (25), the high-pressure nozzle is located in the receiving hole, the front end of the high-pressure nozzle can extend out of the receiving hole, the rear end of the high-pressure nozzle is connected with the adjusting and limiting seat, a hole washing medium through hole communicated with the high-pressure nozzle is formed in the center of the adjusting and limiting seat, the adjusting and limiting seat is axially movable and limited in the inner cavity, and the cross sectional area of the adjusting and limiting seat is larger than that of the receiving hole, the high-pressure-resistant elastic taper sleeve (26) is arranged at one end, far away from the high-pressure nozzle, of the adjusting limiting seat, the outer wall of the high-pressure-resistant elastic taper sleeve (26) can be tightly attached to the inner wall of the inner cavity, and the end part of the high-pressure-resistant elastic taper sleeve (26) is fixedly connected to the end wall, far away from the high-pressure nozzle, of the inner cavity through the flexible connecting sheet.
3. The drilling and hole washing integrated device for coal mine gas extraction as claimed in claim 2, wherein the inner cavity is of a conical structure, the small end of the conical structure faces one side of the high-pressure nozzle, the conical structure of the high-pressure resistant elastic taper sleeve (26) is matched with the conical structure of the inner cavity, a circumferential groove is further formed in the inner wall of the inner cavity corresponding to the high-pressure resistant elastic taper sleeve, and a sealing ring (29) is arranged in the circumferential groove.
4. The drilling and hole washing integrated device for coal mine gas extraction as claimed in claim 2 or 3, wherein when a high-pressure hole washing medium flows to the high-pressure nozzle, the high-pressure hole washing medium can enable the annular wall of the high-pressure-resistant elastic taper sleeve (26) to abut against the inner cavity, and meanwhile the adjusting limiting seat moves towards the front end of the drill bit, so that the high-pressure nozzle extends out of the front end of the drill bit.
5. The drilling and hole washing integrated device for coal mine gas extraction as claimed in claim 4, wherein the high-pressure joint seat (14) is integrally fixed at the rear end of the drill rod, a medium channel is arranged in the high-pressure joint seat, a high-pressure joint (15) is arranged at one end, facing the high-pressure hole washing pipe (5), of the outer end of the high-pressure joint seat, the medium channel is communicated with the high-pressure joint and a central hole (13) of the drill rod, and an end portion (53) of the high-pressure hole washing pipe (5) is detachably connected to the high-pressure joint through threads.
6. The drilling and hole washing integrated device for coal mine gas extraction is characterized in that a drill bit cooling liquid supply assembly is further arranged on the sleeve (10) close to the drilling motor, is connected with a cooling liquid pump and is communicated with the central hole (13) of the drill rod.
7. The drilling and hole washing integrated device for coal mine gas extraction according to claim 6, wherein the drill bit coolant supply assembly comprises an outer sleeve seat (17), a driving spindle (18), a coolant cavity (22) and communication holes (21), wherein the outer sleeve seat (17) is sleeved outside the driving spindle in a manner that a bearing and a rotary sealing ring can rotate relatively, one end of the driving spindle is in transmission connection with the end of the drill rod, the other end of the driving spindle is connected to the drilling motor, the driving spindle is provided with the coolant cavity with a blind hole structure at one end, a communication cavity with the coolant pump is formed between the inner wall of the outer sleeve seat and the outer peripheral wall of the driving spindle, and the communication cavity is communicated with the coolant cavity through the communication holes arranged in the radial direction of the driving spindle, the communicating cavity is connected with the cooling liquid pump through a connecting outer joint (19).
8. The drilling and hole washing integrated device for coal mine gas extraction according to claim 7, wherein one end of the drilling motor, which is far away from the drill rod, is connected with a travel driving seat (8), the travel driving seat is connected with a travel driving and feeding mechanism, the travel driving and feeding mechanism is a hydraulic cylinder, an air cylinder or a screw-nut mechanism, the output end of the drilling motor is connected with a speed reduction controller, and the output end of the speed reduction controller is connected with the driving spindle.
9. The drilling and hole washing integrated device for coal mine gas extraction according to claim 8, characterized in that a plurality of driving tooth shoulders (20) in a circumferential array are arranged in a blind hole structure of the driving spindle, a plurality of driving tooth grooves in a circumferential array are arranged on the outer circumference of the end of the drill rod, and the driving tooth shoulders (20) are matched with the driving tooth grooves and are clamped into a transmission connection.
10. The drilling and hole washing integrated device for coal mine gas extraction as claimed in claim 9, wherein the front end of the high-pressure hole washing pipe (5) is fixed on a mounting seat (16), the mounting seat is sleeved outside the drill rod, a protective cover (6) with a conical structure is further sleeved outside the mounting seat (16), and a drill edge with a spiral structure is arranged outside the drill bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910914365.8A CN110645038B (en) | 2019-09-25 | 2019-09-25 | Drilling and hole washing integrated device for coal mine gas extraction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910914365.8A CN110645038B (en) | 2019-09-25 | 2019-09-25 | Drilling and hole washing integrated device for coal mine gas extraction |
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| Publication Number | Publication Date |
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| CN110645038A true CN110645038A (en) | 2020-01-03 |
| CN110645038B CN110645038B (en) | 2021-01-19 |
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| CN201910914365.8A Expired - Fee Related CN110645038B (en) | 2019-09-25 | 2019-09-25 | Drilling and hole washing integrated device for coal mine gas extraction |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878900A (en) * | 2021-01-19 | 2021-06-01 | 天津市华普生产力促进有限公司 | Drilling tool for penetrating gravel stratum |
| CN113818812A (en) * | 2021-08-11 | 2021-12-21 | 沧州格锐特钻头有限公司 | Roller bit with temperature monitoring and cooling functions |
| CN114687668A (en) * | 2022-03-31 | 2022-07-01 | 华北科技学院(中国煤矿安全技术培训中心) | Broken soft thin coal seam gas extraction directional long drilling construction drilling tool combination and method |
| CN114837588A (en) * | 2022-05-19 | 2022-08-02 | 四川芙蓉川南建设工程有限公司 | Coal seam drilling breakable tail flushing hole device and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878900A (en) * | 2021-01-19 | 2021-06-01 | 天津市华普生产力促进有限公司 | Drilling tool for penetrating gravel stratum |
| CN113818812A (en) * | 2021-08-11 | 2021-12-21 | 沧州格锐特钻头有限公司 | Roller bit with temperature monitoring and cooling functions |
| CN113818812B (en) * | 2021-08-11 | 2024-01-26 | 沧州格锐特钻头有限公司 | Cone bit with temperature monitoring and cooling functions |
| CN114687668A (en) * | 2022-03-31 | 2022-07-01 | 华北科技学院(中国煤矿安全技术培训中心) | Broken soft thin coal seam gas extraction directional long drilling construction drilling tool combination and method |
| CN114687668B (en) * | 2022-03-31 | 2023-10-24 | 华北科技学院(中国煤矿安全技术培训中心) | Drilling tool assembly and method for directional long drilling construction of gas extraction of crushed soft and thin coal seam |
| CN114837588A (en) * | 2022-05-19 | 2022-08-02 | 四川芙蓉川南建设工程有限公司 | Coal seam drilling breakable tail flushing hole device and method |
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