CN114382410A - Downhole broken stratum hole bottom driving rapid pipe following drilling tool and method for coal mine - Google Patents
Downhole broken stratum hole bottom driving rapid pipe following drilling tool and method for coal mine Download PDFInfo
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- CN114382410A CN114382410A CN202210033969.3A CN202210033969A CN114382410A CN 114382410 A CN114382410 A CN 114382410A CN 202210033969 A CN202210033969 A CN 202210033969A CN 114382410 A CN114382410 A CN 114382410A
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- 238000005553 drilling Methods 0.000 title claims abstract description 61
- 239000003245 coal Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 108
- 238000010276 construction Methods 0.000 claims abstract description 11
- 239000011435 rock Substances 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 4
- 244000208734 Pisonia aculeata Species 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000843 powder Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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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
- E21B12/00—Accessories for drilling tools
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
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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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
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- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a coal mine underground broken stratum hole bottom driving rapid pipe following drilling tool and a method, wherein the coal mine underground broken stratum hole bottom driving rapid pipe following drilling tool comprises a sleeve, the bottom of the sleeve is connected with a torsion transmission shell, the bottom of the torsion transmission shell is connected with a sleeve drill bit, the inner side of the torsion transmission shell is provided with a torsion transmission shaft, the upper part of the torsion transmission shaft is connected with a drill rod, and the bottom of the torsion transmission shaft is connected with a small drill bit. The invention realizes the quick pipe following drilling of the hole bottom driving, reduces the stress level of the rear sleeve, reduces the requirements on the material of the pipe and the strength of the connecting screw thread, and reduces the construction cost.
Description
Technical Field
The invention relates to the field of underground coal mine drilling engineering, in particular to a tool and a method for driving quick pipe following drilling of underground coal mine broken stratum hole bottoms.
Background
The water-bearing stratum needs grouting reinforcement before working face recovery under the coal mine, the stratum is broken, and phenomena such as hole wall block falling, hole shrinkage, collapse and water inrush often occur in a grouting drill hole in the construction process, so that the casing cannot enter, the grouting effect is poor, the grouting reinforcement effect of the working face is seriously affected, and further the production continuation of the mine is affected.
At present, an air down-the-hole hammer is adopted as a rock crushing power source and is connected with an eccentric drill bit, and pipe following drilling is realized through pipe shoe matching, but the following defects exist:
(1) rock cannot be effectively broken when the impact drilling meets a soft rock stratum;
(2) the powder is discharged mainly through compressed air, and the stuck drill is easily caused when the stratum goes out of water.
(3) It is difficult to realize that the sleeve pipe is rotatory or rotatory and carry to drawing the cooperation, consequently can't effectively disturb large granule fragment in broken section, influences large granule fragment's discharge effect.
The double-power-head drilling machine is also adopted to drive the synchronous rotary feeding of the sleeve and the drill rod, but the following defects exist:
(1) the requirement on equipment is high, and a double-power-head drilling machine needs to be replaced.
(2) The torque required by the drill bit for breaking the rock is transmitted by twisting the sleeve, and all the sleeves in the holes are at a higher stress level, so that the requirements on the material of the sleeve and the strength of the connecting screw thread are higher.
Disclosure of Invention
The invention aims to provide a downhole broken stratum hole bottom driving rapid pipe following drilling tool and a downhole broken stratum hole bottom driving rapid pipe following drilling method for a coal mine, and aims to solve the problems of no ruler entering of soft rock, drilling in case of water pasting and poor deslagging effect of complex stratum existing in the drilling of a pneumatic down-the-hole hammer pipe following and a series of problems of high equipment requirement, high sleeve material and high screw thread connection strength existing in the drilling of a double-power-head drilling machine pipe following.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a colliery is broken stratum hole bottom drive in pit is with pipe fast and is crept into instrument, includes the sleeve pipe, sheathed tube bottom is connected with the biography and turns round the shell, the bottom of the shell is turned round in the biography is connected with the casing bit, the inboard of the shell is turned round in the biography is provided with the biography and turns round the axle, the upper portion of passing the torsion axle is connected with the drilling rod, the bottom of passing the torsion axle is connected with little drill bit, when using, the drilling rod is connected to the rig, rig drive drilling rod, and the drilling rod drives and passes the torsion axle, passes the torsion axle and turns round the shell with the moment of torsion transmission, and the shell front end is turned round in the biography drives the casing bit and breaks the rock, and the rotatory stirring of rear end drive sleeve pipe bores the sediment, passes the torsion axle front end and drives little drill bit and breaks the rock.
Further, the biography is turned round the axle including biography and is turned round the axle body, and biography is turned round the axle body and is provided with the hole, and the upper end of biography is turned round the axle body and is provided with the foreign side of being convenient for to add and unload the drilling rod, and the middle part of biography is turned round the axle body and is provided with the seal ring groove that is used for installing the sealing washer, and the bottom of biography is turned round the axle body and is provided with the toper screw thread that is used for connecting little drill bit, the circumference of biography is turned round the axle body and is provided with in the week and is used for transmitting the moment of torsion for the key of biography torsional shell and is used for wasing the water hole that overflows in space between biography torsional axis and the biography torsional shell.
Further, the keys are arranged on the lower side of the sealing ring groove, and the keys are uniformly distributed on the outer side of the torque transmission shaft body in a 3 x 120 degree mode.
Furthermore, the overflowing water holes are uniformly distributed on the outer side of the torque transmission shaft body in a 2 multiplied by 180 degree mode.
Further, the shell is turned round including passing to the biography, the one end of passing to turning round the shell is provided with the back spiral that is used for adapter sleeve, and the other end is provided with the preceding screw thread that is used for connecting the casing bit, the inboard of passing to turning round the shell is provided with the L type key that is used for receiving the moment of torsion of biography torsional axis.
Furthermore, the L-shaped keys are uniformly distributed on the inner side of the torque transmission shell in a 3 x 120-degree mode, and the roots of the L-shaped keys are matched with the keys so as to realize that the drill rod is pulled back to drive the sleeve to be pulled back; when the construction is finished, the space between the two L-shaped keys is the backspacing space of the keys, and the keys can be separated from the L-shaped keys by reversing the drill rod for a certain angle.
Furthermore, the front screw thread adopts a right-handed structure, and the rear screw thread adopts a left-handed structure.
A coal mine underground broken stratum hole bottom driving rapid pipe following drilling method comprises the following steps:
the first step is as follows: performing rotary construction on a pilot hole, reaming and a next-stage sleeve;
the second step is that: installing a torque transmission shaft, a torque transmission shell, a sleeve bit and a small bit;
the third step: the drill rod is connected with the torque transmission shaft, and the sleeve is connected with the torque transmission shell;
the fourth step: pumping water, after returning water, driving a drill rod by a drilling machine, further driving a torque transmission shaft, transmitting torque to a torque transmission shell by the torque transmission shaft, driving a casing bit to break rock at the front end of the torque transmission shell, driving a casing to rotate and stir drilling slag at the rear end of the torque transmission shell, and driving a small bit to break rock at the front end of the torque transmission shaft;
the fifth step: after the synchronous drilling is carried out for a specific stroke, stopping the pump, additionally connecting a drill rod, then additionally connecting a sleeve on the outer layer, and repeating the fourth step;
and a sixth step: and after reaching the design position, stopping rotating, flushing for a certain time, reversely rotating the drill rod by using a drilling machine, simultaneously lifting, separating the torque transmission shaft from the torque transmission shell, and then lifting the small drill bit, the torque transmission shaft and the drill rod.
Compared with the prior art, the invention has the following beneficial technical effects:
(1) in the using process of the drilling machine, the drilling machine drives the drill rod to further drive the torque transmission shaft, the torque transmission shaft transmits torque to the torque transmission shell through a key, the front end of the torque transmission shell drives the casing bit to break rock, the rear end drives the casing to rotate and stir drilling slag, and the front end of the torque transmission shaft drives the small bit to break rock; after the synchronous drilling is carried out for a specific stroke, stopping the pump, additionally connecting a drill rod, then additionally connecting a sleeve on the outer layer, and repeating the process; the drilling machine is used for driving the drill rod to rotate reversely for a certain time, the drill rod is lifted simultaneously, the torsion transmission shaft is separated from the torsion transmission shell, then the small drill bit, the torsion transmission shaft and the drill rod are lifted, the rapid drilling with the pipe under the drive of the hole bottom is realized, in addition, the rock breaking torque of the casing bit is directly provided by the torsion transmission shell, and the rear part of the torsion transmission shell only drives the rear casing to rotate, so that the outer layer drilling tool is in a low-stress state except the torsion transmission shell and the casing bit, the stress level of the rear casing is reduced, the requirements on the material of the pipe and the strength of a connecting screw thread are reduced, and the construction cost is reduced.
(2) The sealing ring groove on the torque transmission shaft body is used for installing an O-shaped ring and is matched with the torque transmission shell, so that the accident that water and rock powder return from the annular space of the drill rod and the sleeve pipe to block the remaining pipe is avoided.
(3) The invention solves the problems of no footage of soft rock, sticking when water and the like caused by drilling with the pipe of the air down-the-hole hammer by arranging the overflowing water hole and adopting hydraulic slag discharge.
(4) The invention does not need to replace large-scale equipment such as a drilling machine and the like, and has simple construction method and high economical efficiency.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic view of a bottom hole drive rapid casing drilling tool assembly;
FIG. 2 is a schematic view of a torque transmission housing; wherein (a) is a three-dimensional structure diagram, and (b) is a cross-sectional diagram;
fig. 3 is a schematic view of a torque transmission shaft.
Wherein, 1, a sleeve; 2, drilling a drill rod; 3, transmitting the torsion shell; 4-casing bit; 5, a torsion transmission shaft; 6-small drill bit; 3-1-torque transmission shell; 3-2-L type bond; 3-front thread; 3-4-back thread; 3-5-groove; 5-1-foreign; 5-2-torque transmission shaft body; 5-3-sealing ring groove; 5-4-overflowing water hole; a 5-bond; 5-6-conical screw threads; 5-7-inner hole.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings:
referring to fig. 1 to 3, the bottom-of-hole driving rapid pipe-following drilling process of the present invention:
the first step is as follows: a pilot hole is formed in the rotary construction, hole expansion is carried out, and a next-stage casing 1 (the first-stage casing is thick, the second-stage casing is thin, and the second-stage casing penetrates through the first-stage casing);
the second step is that: installing a torque transmission shaft 5, a torque transmission shell 3, a casing drill bit 4 and a small drill bit 6 (the components are installed on the lowest casing pipe in the second step);
the third step: the drill rod 2 is connected with the torque transmission shaft 5, and the sleeve 1 is connected with the torque transmission shell 3;
the fourth step: pumping water through a drill rod and a torque transmission shaft, after water is returned, driving the drill rod 2 by a drilling machine, further driving a torque transmission shaft 5, transmitting torque to a torque transmission shell 3 by the torque transmission shaft 5 through a key, driving a casing bit 4 to break rock at the front end of the torque transmission shell 3, driving a casing 1 to rotate and stir drilling slag at the rear end, and driving a small bit 6 to break rock at the front end of the torque transmission shaft 5;
the fifth step: after the synchronous drilling is carried out for a specific stroke, stopping the pump, additionally connecting the drill rod 2, then additionally connecting the casing pipe 1 on the outer layer, and repeating the fourth step;
and a sixth step: and after reaching the design position, stopping rotating, flushing for a certain time, reversely rotating the drill rod 2 by using a drilling machine, simultaneously lifting, separating the torque transmission shaft 5 from the torque transmission shell 3, and then lifting the small drill bit 6, the torque transmission shaft 5 and the drill rod 2.
2. The torque transmission shaft of the present invention includes: 5-1 of outer square, 5-2 of a torque transmission shaft body, 5-3 of a seal ring groove, 5-4 of an overflowing water hole, 5-5 of a key, 5-6 of a conical screw thread and 5-7 of an inner hole.
The outer square 5-1 is used for facilitating the loading and unloading of the drill rod 2;
an inner hole 5-7 for water passing is formed in the torque transmission shaft body 5-2;
the seal ring groove 5-3 is used for installing an O-shaped ring and is matched with the torque transmission shell 3, so that the pipe retaining blockage accident caused by water and rock powder returning from the annular space between the drill rod 2 and the sleeve 1 is prevented;
the keys 5-5 are uniformly distributed according to 3 multiplied by 120 degrees;
the overflowing water holes 5-4 are uniformly distributed according to 2 multiplied by 180 degrees and are used for cleaning the space between the torque transmission shaft 5 and the torque transmission shell 3;
the conical thread 5-6 is used for connecting a small drill bit 6.
3. The torsion transmission shell of the invention comprises: comprises a torque transmission shell 3-1, an L-shaped key 3-2, a front thread 3-3, a rear thread 3-4 and a groove 3-5.
The L-shaped keys 3-2 are uniformly distributed according to 3 multiplied by 120 degrees and are used for receiving the torque of the transmission torsion shaft 5; the root groove 3-5 of the L-shaped key 3-2 is matched with the key 5-5, so that the casing 1 can be pulled back by pulling back the drill rod 2; when the construction is finished, the space between the two L-shaped keys 3-2 is the retraction space of the key 5-5, and the key 5-5 is separated from the L-shaped key 3-2 by reversing the drill rod 1 for a certain angle;
the front threads 3-3 adopt a right-handed structure and are used for transmitting clockwise torque so as to drive the casing bit 4 to break rock;
the rear threads 3-4 adopt a left-handed structure, and drive the upper sleeve 1 to rotate anticlockwise when viewed from the hole bottom direction to the orifice direction. Because the rock breaking torque of the casing bit 4 is directly provided by the torque transmission shell 3, and the rear part of the torque transmission shell 3 only drives the rear casing to rotate, the outer layer drilling tool is in a low stress state except the torque transmission shell 3 and the casing bit 4, the requirements on the material quality of the pipe and the strength of a connecting screw thread are reduced, and the construction cost is reduced.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (8)
1. A coal mine underground broken stratum hole bottom driving rapid pipe following drilling tool is characterized by comprising a sleeve (1), the bottom of the sleeve (1) is connected with a transmission torsion shell (3), the bottom of the transmission torsion shell (3) is connected with a sleeve drill bit (4), a torsion transmission shaft (5) is arranged on the inner side of the torsion transmission shell (3), the upper part of the torsion transmission shaft (5) is connected with a drill rod (2), the bottom of the torsion transmission shaft (5) is connected with a small drill bit (6), when the drilling machine is used, the drill rod (2) is connected to a drilling machine, the drilling machine drives the drill rod (2), the drill rod (2) drives the torque transmission shaft (5), the torque transmission shaft (5) transmits torque to the torque transmission torsion shell (3), the front end of the torque transmission torsion shell (3) drives the casing bit (4) to break rock, the rear end of the driving casing (1) rotates to stir drilling slag, and the front end of the torque transmission shaft (5) drives the small bit (6) to break rock.
2. The tool as claimed in claim 1, which is used for driving a rapid pipe-following drilling tool for underground coal mine broken stratum hole bottom, it is characterized in that the torque transmission shaft (5) comprises a torque transmission shaft body (5-2), the torque transmission shaft body (5-2) is provided with an inner hole (5-7), the upper end of the torque transmission shaft body (5-2) is provided with an outer square (5-1) which is convenient for loading and unloading the drill rod (2), the middle part of the torque transmission shaft body (5-2) is provided with a sealing ring groove (5-3) for installing a sealing ring, the bottom of the torque transmission shaft body (5-2) is provided with a conical screw thread (5-6) for connecting a small drill bit (6), and a key (5-5) for transmitting torque to the torque transmission shell (3) and an overflowing water hole (5-4) for cleaning a space between the torque transmission shaft (5) and the torque transmission shell (3) are arranged in the circumferential direction of the torque transmission shaft body (5-2).
3. The downhole broken formation hole bottom driving rapid pipe following drilling tool for the coal mine according to claim 2, wherein the keys (5-5) are arranged at the lower side of the sealing ring groove (5-3), and the keys (5-5) are uniformly distributed at the outer side of the torque transmission shaft body (5-2) according to a 3 x 120 degree form.
4. The downhole broken formation hole bottom driving rapid pipe following drilling tool for the coal mine according to claim 2, wherein the overflowing water holes (5-4) are uniformly distributed on the outer side of the torque transmission shaft body (5-2) in a 2 x 180 degree mode.
5. The underground coal mine broken formation hole bottom driving rapid pipe following drilling tool according to claim 2, wherein the torque transmission shell (3) comprises a torque transmission shell (3-1), one end of the torque transmission shell (3-1) is provided with a rear screw (3-4) used for connecting a sleeve (1), the other end of the torque transmission shell is provided with a front screw thread (3-3) used for connecting a sleeve bit (4), and the inner side of the torque transmission shell (3-1) is provided with an L-shaped key (3-2) used for receiving torque of a torque transmission shaft (5).
6. The downhole broken stratum hole bottom driving rapid pipe following drilling tool for the coal mine according to claim 5, wherein the L-shaped keys (3-2) are uniformly distributed on the inner side of the torque transmission shell (3-1) in a 3 x 120 degree mode, and the roots of the L-shaped keys (3-2) are matched with the keys (5-5) to realize the pull-back of the driving sleeve (1) through the pull-back of the drill rod (2); when the construction is finished, the space between the two L-shaped keys (3-2) is the retraction space of the keys (5-5), and the keys (5-5) can be separated from the L-shaped keys (3-2) by reversing the drill rod (1) for a certain angle.
7. The downhole broken formation hole bottom driving rapid pipe following drilling tool for the coal mine according to claim 5, wherein the front threads (3-3) adopt a right-handed structure, and the rear threads (3-4) adopt a left-handed structure.
8. A coal mine underground broken stratum hole bottom driving rapid pipe following drilling method adopts the coal mine underground broken stratum hole bottom driving rapid pipe following drilling tool disclosed by claim 1, and is characterized by comprising the following steps:
the first step is as follows: performing rotary construction on a pilot hole, reaming and a next-stage sleeve;
the second step is that: a torsion transmission shaft (5), a torsion transmission shell (3), a casing drill bit (4) and a small drill bit (6) are installed;
the third step: the drill rod (2) is connected with the torque transmission shaft (5), and the sleeve (1) is connected with the torque transmission shell (3);
the fourth step: pumping water, after water is returned, driving a drill rod (2) by a drilling machine, further driving a torque transmission shaft (5), transmitting torque to a torque transmission shell (3) by the torque transmission shaft (5), driving a casing bit (4) to break rock at the front end of the torque transmission shell (3), driving a casing (1) to rotate and stir drilling slag at the rear end, and driving a small bit (6) to break rock at the front end of the torque transmission shaft (5);
the fifth step: after the synchronous drilling is carried out for a specific stroke, stopping the pump, additionally connecting the drill rod (2), then additionally connecting the casing pipe (1) on the outer layer, and repeating the fourth step;
and a sixth step: and after reaching the design position, stopping rotating, flushing for a certain time, reversely rotating the drill rod (2) by using a drilling machine, simultaneously lifting, separating the torque transmission shaft (5) from the torque transmission shell (3), and then lifting the small drill bit (6), the torque transmission shaft (5) and the drill rod (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210033969.3A CN114382410A (en) | 2022-01-12 | 2022-01-12 | Downhole broken stratum hole bottom driving rapid pipe following drilling tool and method for coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210033969.3A CN114382410A (en) | 2022-01-12 | 2022-01-12 | Downhole broken stratum hole bottom driving rapid pipe following drilling tool and method for coal mine |
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| Publication Number | Publication Date |
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| CN114382410A true CN114382410A (en) | 2022-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210033969.3A Pending CN114382410A (en) | 2022-01-12 | 2022-01-12 | Downhole broken stratum hole bottom driving rapid pipe following drilling tool and method for coal mine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115126507A (en) * | 2022-05-05 | 2022-09-30 | 中国矿业大学(北京) | Method for forming holes by grouting broken rock ores |
| CN115898367A (en) * | 2022-11-08 | 2023-04-04 | 四川省金钻地质矿产勘探工程有限责任公司 | Measuring device for advanced geological forecast drilling of tunnel and using method thereof |
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| CN109630023A (en) * | 2018-12-01 | 2019-04-16 | 谭雄卫 | In the method and ground device for regulating direction of soft stratum laying horizontal pipe |
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2022
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| CN101956525A (en) * | 2010-09-08 | 2011-01-26 | 吉林大学 | Down-the-hole hammer reverse concentric casing drilling tool |
| CN202520228U (en) * | 2012-04-25 | 2012-11-07 | 宜昌市五环钻机具有限责任公司 | Integrated concentric overburden drilling tool |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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