CN113090186B - Coal mine underground bundling type large-diameter directional drilling and expanding integrated tool and method - Google Patents
Coal mine underground bundling type large-diameter directional drilling and expanding integrated tool and method Download PDFInfo
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- CN113090186B CN113090186B CN202110300549.2A CN202110300549A CN113090186B CN 113090186 B CN113090186 B CN 113090186B CN 202110300549 A CN202110300549 A CN 202110300549A CN 113090186 B CN113090186 B CN 113090186B
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- 238000005553 drilling Methods 0.000 title claims abstract description 254
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000003245 coal Substances 0.000 title claims abstract description 19
- 238000011010 flushing procedure Methods 0.000 claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 62
- 230000005540 biological transmission Effects 0.000 claims description 33
- 238000005192 partition Methods 0.000 claims description 24
- 238000004891 communication Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 9
- 238000010276 construction Methods 0.000 abstract description 16
- 239000011435 rock Substances 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 230000002265 prevention Effects 0.000 description 1
- 230000009182 swimming Effects 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
- 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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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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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- 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
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
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Abstract
The invention discloses a bundling type large-diameter directional drilling and reaming integrated tool and method under a coal mine, which comprises a large-diameter directional drilling and reaming device and a pilot directional drilling tool assembly; the large-diameter reaming-while-drilling device comprises a reaming bit assembly, a central pipe and three straight screw drilling tools which are uniformly distributed around the circumference of the central pipe and are parallel to the central pipe; the three straight screw drilling tools are communicated with the four-stage cavity in the central tube, and flushing fluid is distributed through the four-stage cavity to sequentially drive the upper cluster type straight screw and the lower directional bent screw, so that directional drilling and reaming while drilling are simultaneously performed. The invention can realize directional drilling and reaming drilling by reasonably distributing the high-pressure flushing fluid in the drilling process, reduces the construction procedures in the large-diameter drilling construction process, simultaneously utilizes the flushing fluid to drive the large-diameter drill bit to ream, avoids the risk of drilling tool accidents caused by the rotation of orifice power, is suitable for coal seam drilling and rock stratum drilling, and has important significance for safe and efficient large-diameter drilling hole forming.
Description
Technical Field
The invention belongs to the field of directional drilling of underground coal mines, and particularly relates to a bundling type large-diameter directional drilling and expanding integrated tool and method for the underground coal mines.
Background
The directional drilling in the underground coal mine has the advantages of high drilling precision, long effective hole section and the like, and is widely applied to the fields of underground coal mine gas extraction, water damage prevention, geological abnormal body exploration and the like, and good application effect is achieved.
With the development of the underground directional drilling technology and equipment of the coal mine, the directional drilling makes a great breakthrough in depth, and basically meets the current underground directional drilling requirement, but in gas extraction and other large-diameter hole drilling with special application, the current process technology cannot meet the requirement that the single construction hole diameter exceeds 200mm, generally adopts the technical scheme of firstly constructing a small-diameter directional pilot drilling hole and then performing one or more large-diameter hole expanding constructions, because the rock crushing power in the large-diameter hole expanding construction completely comes from the rotation of a power head of an orifice drilling machine, and because the hole diameter is larger, the drilling tool in the hole is in a buckling state after being compressed, the drilling tool in the hole is in a complex stress state, the hole accident is easy to occur, and the safe and efficient drilling is not facilitated.
The diameter of a drill bit and a matched drilling tool needs to be improved when the diameter of a single pore-forming is required to be improved, the requirements on an orifice drilling machine for friction resistance and dead weight of the drilling tool in a drilling middle hole are high, the orifice drilling whole set of operation capacity needs to be improved in a matched mode, and if a small-diameter drilling rod is matched with a large-diameter screw and a large-diameter motor to carry out one-time construction, the construction efficiency is low and directional drilling is difficult.
Therefore, in view of the requirements and the problems existing at present of safe and efficient drilling of large-diameter drilling holes under coal mines, a designer of the invention researches and designs a bundling type large-diameter directional drilling and reaming integrated tool under coal mines by means of careful research and design and integrating experience and achievement of related industries for many years, realizes directional drilling and reaming drilling of large-diameter drilling holes in one drilling by means of the existing equipment capacity, can reduce the construction process of large-diameter directional drilling holes, and improves the construction efficiency and drilling safety of large-diameter drilling holes.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a coal mine underground cluster type large-diameter directional drilling and expanding integrated tool and a method, which are used for solving the problems of low construction efficiency, difficult directional drilling and the like of large-diameter drilling; the device is simple in structure, realizes simultaneous implementation of the large-diameter directional drilling and the hole expanding drilling, reduces the construction procedures of the large-diameter directional drilling, and improves the construction efficiency and the drilling safety of the large-diameter drilling.
In order to achieve the purpose, the invention adopts the following technical scheme:
a large diameter reaming while drilling apparatus comprising: the hole expanding drill bit assembly comprises a hole expanding drill bit assembly, a central pipe and three straight screw drilling tools which are uniformly distributed around the circumference of the central pipe and are parallel to the central pipe; the three straight screw drilling tools are respectively a first straight screw drilling tool, a second straight screw drilling tool and a third straight screw drilling tool, and the side wall of each straight screw drilling tool is provided with an upper water hole and a lower water hole;
the water inlet end of the central pipe is communicated with the water inlet hole of the first straight screw drilling tool, the water outlet hole of the second straight screw drilling tool is communicated with the water outlet hole of the third straight screw drilling tool, and the water outlet end of the central pipe is communicated with the water outlet hole of the fourth straight screw drilling tool;
the reaming bit assembly is sleeved at the water outlet end of the central pipe and is in transmission connection with the end parts of the three straight screw drilling tools;
the flushing fluid can sequentially pass through the first straight screw drilling tool, the second straight screw drilling tool and the third straight screw drilling tool.
The invention also comprises the following technical characteristics:
specifically, a baffle assembly is arranged in the central tube to divide the interior of the central tube into a first-stage chamber, a second-stage chamber, a third-stage chamber and a fourth-stage chamber;
the baffle assembly comprises a first rectangular baffle, a second rectangular baffle, a third rectangular baffle, a fourth rectangular baffle and a fifth rectangular baffle which are of an integrated structure, one long edge of each baffle is arranged along the central axis of the central tube, and the other long edge of each baffle is tightly attached to the inner wall of the central tube; the length of the first baffle is equal to the sum of the lengths of the third baffle and the fourth baffle, the length of the second baffle is smaller than that of the third baffle, and the length of the fifth baffle is smaller than that of the fourth baffle;
the first baffle, the second baffle and the third baffle are radially distributed along the central pipe and are positioned at trisection positions of the circumference of the central pipe, and the lengths of the second baffle and the third baffle are smaller than the length of the first baffle and are positioned at the upper part of the first baffle; the fourth baffle is arranged at the lower part of the first baffle and is positioned in the same radial direction as the second baffle, and the fifth baffle is also arranged at the lower part of the first baffle and is positioned in the same radial direction as the third baffle;
a first baffle plate is vertically arranged at the upper ends of the first baffle plate, the second baffle plate and the third baffle plate, is of a two-thirds circular structure and is positioned between the first baffle plate and the third baffle plate as well as between the second baffle plate and the third baffle plate; a second baffle plate is vertically arranged at the lower end of the second baffle plate, is of a one-third circular structure and is positioned between the second baffle plate and the first baffle plate; a third baffle plate is vertically arranged at the lower end of the third baffle plate and the upper end of the fourth baffle plate, is of a one-third round structure and is positioned between the third baffle plate and the fourth baffle plate; a fourth baffle plate is vertically arranged at the upper end of the fifth baffle plate, is of a one-third round structure and is positioned between the first baffle plate and the fifth baffle plate; and a fifth baffle plate is vertically arranged at the lower ends of the first baffle plate, the fourth baffle plate and the fifth baffle plate, is of a two-thirds circular structure and is positioned between the first baffle plate and the fourth baffle plate as well as between the fifth baffle plate and the fourth baffle plate.
Specifically, the primary chamber is surrounded by a central pipe inner wall, a first baffle, a second baffle and a second partition plate; the secondary chamber is surrounded by the inner wall of the central pipe, the first baffle, the fourth baffle, the third baffle, the first partition, the second partition, the third partition and the fifth partition; the third-stage chamber is surrounded by the inner wall of the central pipe, the first baffle, the third baffle, the fourth baffle, the fifth baffle, the third baffle, the fourth baffle and the first baffle; the four-stage chamber is enclosed by the inner wall of the central pipe, the first baffle, the fifth baffle and the fourth baffle.
Specifically, the inner wall of the upper part of the central pipe corresponding to the primary chamber is provided with a first upper communication joint which is communicated with an upper water hole of the first straight screw drilling tool; the inner wall of the lower part of the central pipe corresponding to the secondary chamber is provided with a first lower communicating joint which is communicated with a lower water hole of the first straight screw drilling tool, and the inner wall of the upper part of the central pipe corresponding to the secondary chamber is provided with a second upper communicating joint which is communicated with an upper water hole of the second straight screw drilling tool; the inner wall of the lower part of the central pipe corresponding to the three-stage chamber is provided with a second lower communicating joint to be communicated with a lower water hole of a second straight screw drilling tool, and the inner wall of the upper part of the central pipe corresponding to the three-stage chamber is provided with a third upper communicating joint to be communicated with an upper water hole of a third straight screw drilling tool; and a lower third communicating joint is arranged on the inner wall of the lower part of the central pipe corresponding to the four-stage chamber and is communicated with a lower water hole of a third straight screw drilling tool.
Specifically, all be equipped with the transmission shaft in the third straight screw rod drilling tool, the tip outer wall of transmission shaft is equipped with the transmission external tooth, and reamer bit assembly inner wall is equipped with the transmission internal tooth, and the transmission external tooth of three straight screw rod drilling tool all meshes with the transmission internal tooth of reamer bit assembly, forms planetary gear set to thereby drive reamer bit assembly rotation through the transmission shaft rotation of three straight screw rod drilling tool of flush fluid drive.
Specifically, a throttle valve is arranged in the third straight screw drilling tool.
Specifically, the outer wall of the lower part of the central tube is sequentially provided with a central tube outer wall, a middle-diameter section, a small-diameter section and a lower connecting thread along the axial direction; the diameter of the middle-diameter section is smaller than that of the outer wall of the central tube, a first-stage shoulder is arranged between the middle-diameter section and the outer wall of the central tube, the diameter of the small-diameter section is smaller than that of the middle-diameter section, and a second-stage shoulder is arranged between the small-diameter section and the middle-diameter section;
the reaming bit assembly comprises a reaming bit body and an end cover which are sleeved outside the central tube; the end cover is vertical to the central pipe, and the central pipe and the three straight screw drilling machines vertically penetrate through the end cover; the end cover is tightly attached to and sleeved on the middle diameter section, one side of the end cover is a primary shoulder, and the other side of the end cover is a fixed sleeve sleeved on the middle diameter section so as to axially position the end cover; the reaming bit body is tightly attached to and sleeved on the small-diameter section, one side of the reaming bit body is a secondary shoulder, and the other side of the reaming bit body is a pressing ring sleeved on the small-diameter section so as to axially position the reaming bit body.
A colliery is bunched in the integrated tool that directional drilling and reaming of major diameter in pit, including the said major diameter bores the reaming device while drilling, also include the pilot-operated directional drilling tool assembly;
the water outlet end of the central tube is coaxially connected with the pilot directional drilling tool assembly; the flushing fluid can sequentially pass through the first straight screw drilling tool, the second straight screw drilling tool, the third straight screw drilling tool and the pilot directional drilling tool combination, namely the directional drilling bits in the reaming bit assembly and the pilot directional drilling tool combination are sequentially driven;
the pilot directional drilling tool assembly comprises an extension drilling tool, a measuring system, a single-bent screw motor and a directional drilling bit which are sequentially distributed along the axial direction.
A directional drilling and reaming method for a cluster type large-diameter directional drilling and reaming integrated tool in a coal mine well is characterized in that the integrated tool is adopted to realize the simultaneous implementation of the directional drilling and the reaming drilling of a large-diameter drilling hole.
Specifically, the method comprises the following steps:
flushing fluid enters the first-stage cavity from the water inlet end of the central pipe, then enters the first straight screw drilling tool and drives a transmission shaft in the first straight screw drilling tool, the flushing fluid flows into the second-stage cavity through the first straight screw drilling tool and then enters the second straight screw drilling tool and drives a transmission shaft in the second straight screw drilling tool, and the flushing fluid flows into the third-stage cavity through the second straight screw drilling tool and then enters the third straight screw drilling tool and drives a transmission shaft in the third straight screw drilling tool; the three straight screw drilling tools drive and the reaming bit assembly to rotate to realize reaming; meanwhile, a part of flushing liquid flowing into the third straight screw drilling tool flows into the four-stage chamber and then enters the pilot directional drilling tool assembly to drive the directional drill bit to realize drilling; and spraying another part of flushing liquid in the third straight screw drilling tool out of a water hole of the reaming bit assembly to flush the reaming bit assembly.
Compared with the prior art, the invention has the beneficial technical effects that:
according to the invention, the high-pressure flushing fluid in the drilling process is reasonably distributed, so that one drill can be realized for large-diameter drilling directional drilling and reaming drilling, the large-diameter directional drilling construction procedures are reduced, and the large-diameter drilling construction efficiency is improved; in the large-diameter drilling construction, the rock crushing power is completely derived from the screw drilling tool driven by flushing fluid pressure, so that the complex stress condition of the drilling tool in the hole is avoided, the drilling tool accident risk caused by the rotation of the orifice power is avoided, the method is also suitable for rock stratum drilling, and the method has important significance for safe and efficient hole forming of large-diameter drilling.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the external structure of the center rod.
FIG. 3 is a schematic view of the construction of a center rod inner barrier assembly.
Fig. 4 is a partial sectional view of the third straight screw.
Fig. 5 is a cross-sectional view of a reamer bit assembly.
Reference signs mean:
1. a large-diameter reaming-while-drilling device, 2, a pilot directional drilling tool assembly; 10. the method comprises the following steps of (1) reaming a drill bit assembly, 20 parts of a central pipe, 30 parts of a first straight screw drilling tool, 40 parts of a second straight screw drilling tool, and 50 parts of a third straight screw drilling tool; 101. water hole, 102 reaming bit body, 103 end cover, 104 fixing sleeve, 105 pressing ring; 201. the first-stage chamber 202, the second-stage chamber 203, the third-stage chamber 204, the fourth-stage chamber 205, the first baffle plate 206, the second baffle plate 207, the third baffle plate 208, the fourth baffle plate 209, the fifth baffle plate 210, the first partition plate 211, the second partition plate 212, the third partition plate 213, the fourth partition plate 214, the fifth partition plate 215, the upper first communication joint 216, the lower first communication joint 217, the upper second communication joint 218, the lower second communication joint 219, the upper third communication joint 220, the lower third communication joint 221, the middle-diameter section 222, the small-diameter section 223, the lower connecting thread 224, the first-stage chamber 225, and the second-stage shoulder; 501. drive shaft, 502. Throttle valve; 21. directional drill bit, 22 single bending screw motor, 23 measuring system, 24 extension drilling tool.
The invention is described in detail below with reference to the drawings and the detailed description.
Detailed Description
The present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention fall within the protection scope of the present invention. The present invention will be described in further detail with reference to examples.
Example 1:
as shown in fig. 1 to 5, the present embodiment provides a large-diameter reaming-while-drilling device, including: the hole expanding drill bit assembly comprises a hole expanding drill bit assembly 10, a central tube 20 and three straight screw drilling tools which are uniformly distributed around the circumference of the central tube and are parallel to the central tube; the three straight screw drilling tools are respectively a first straight screw drilling tool 30, a second straight screw drilling tool 40 and a third straight screw drilling tool 50, and each straight screw drilling tool side wall is provided with an upper water hole and a lower water hole.
The first-stage cavity 201, the second-stage cavity 202, the third-stage cavity 203 and the fourth-stage cavity 204 which are mutually separated are arranged inside the central tube 20, wherein the first-stage cavity 201 is communicated with the water inlet end of the central tube 20 and the water inlet hole of the first straight screw drilling tool 30, the second-stage cavity 202 is communicated with the water outlet hole of the first straight screw drilling tool 30 and the water inlet hole of the second straight screw drilling tool 40, the third-stage cavity 203 is communicated with the water outlet hole of the second straight screw drilling tool 40 and the water inlet hole of the third straight screw drilling tool 50, and the fourth-stage cavity 204 is communicated with the water outlet hole of the third straight screw drilling tool 50 and the water outlet end of the central tube 20. The chambers at all levels are communicated through three straight screw drilling tools to form a flushing fluid serial channel.
The reaming bit assembly 10 is sleeved at the water outlet end of the central tube 20, the reaming bit assembly 10 is in transmission connection with the end parts of the three straight screw drilling tools, and the water outlet end of the central tube 20 is coaxially connected with the pilot directional drilling tool assembly 2.
The flushing liquid can sequentially pass through the first straight screw drilling tool 30, the second straight screw drilling tool 40, the third straight screw drilling tool 50 and the pilot directional drilling tool assembly 2, namely the reaming bit assembly 10 and the directional bit 21 in the pilot directional drilling tool assembly 2 are sequentially driven, and the reaming bit assembly is driven at a small flow rate in a series connection mode of three straight screw drilling tools.
A baffle assembly is arranged in the central tube 20 to divide the central tube into a first-stage chamber 201, a second-stage chamber 202, a third-stage chamber 203 and a fourth-stage chamber 204; in this embodiment, it is baffle upper portion to establish one side that every baffle is close to the center tube end of intaking, and one side that is close to the center tube end of swimming is the baffle lower part:
the baffle assembly comprises a first baffle 205, a second baffle 206, a third baffle 207, a fourth baffle 208 and a fifth baffle 209 which are rectangular and of an integrated structure, wherein one long side of each baffle is distributed along the central axis of the central tube 20, and the other long side of each baffle is tightly attached to the inner wall of the central tube 20; the length of first baffle 205 is equal to the sum of the lengths of third baffle 207 and fourth baffle 208, the length of second baffle 206 is less than the length of third baffle 207, and the length of fifth baffle 209 is less than the length of fourth baffle 208.
Wherein, the first baffle 205, the second baffle 206 and the third baffle 207 are all arranged along the radial direction of the central tube 20 and are positioned at the trisection position of the circumference of the central tube 20, and the second baffle 206 and the third baffle 207 are positioned at the upper part of the first baffle 205; fourth baffle 208 is disposed below first baffle 205 and in the same radial direction as second baffle 206, and fifth baffle 209 is also disposed below first baffle 205 and in the same radial direction as third baffle 207.
A first baffle plate 210 is vertically arranged at the upper ends of the first baffle plate 205, the second baffle plate 206 and the third baffle plate 207, and the first baffle plate 210 is of a two-thirds circular structure and is positioned between the first baffle plate 205 and the third baffle plate 207 and between the second baffle plate 206 and the third baffle plate 207; a second baffle 211 is vertically arranged at the lower end of the second baffle 206, and the second baffle 211 is a one-third round structure and is positioned between the second baffle 206 and the first baffle 205; a third baffle 212 is vertically arranged at the lower end of the third baffle 207 and the upper end of the fourth baffle 208, and the third baffle 212 is of a one-third round structure and is positioned between the third baffle 207 and the fourth baffle 208; a fourth baffle plate 213 is vertically arranged at the upper end of the fifth baffle plate 209, and the fourth baffle plate 213 is in a one-third round structure and is positioned between the first baffle plate 205 and the fifth baffle plate 209; a fifth baffle plate 214 is vertically arranged at the lower ends of the first baffle plate 205, the fourth baffle plate 208 and the fifth baffle plate 209, and the fifth baffle plate 214 is of a two-thirds circular structure and is positioned between the first baffle plate 205 and the fourth baffle plate 208 and between the fifth baffle plate 209 and the fourth baffle plate 208.
The primary chamber 201 is enclosed by the inner wall of the central tube 20, a first baffle 205, a second baffle 206 and a second baffle 211; the secondary chamber 202 is enclosed by the inner wall of the central tube 20, a first baffle 205, a fourth baffle 208, a third baffle 207, a first partition 210, a second partition 211, a third partition 212, and a fifth partition 214; the tertiary chamber 203 is enclosed by the inner wall of the central tube 20, a first baffle 205, a third baffle 207, a fourth baffle 208, a fifth baffle 214, a third baffle 212, a fourth baffle 213 and a first baffle 210; the quaternary chamber 204 is bounded by the inner wall of the central tube 20, the first baffle 205, the fifth baffle 209, and the fourth baffle 213.
An upper first communication joint 215 is arranged on the inner wall of the upper part of the central pipe 20 corresponding to the first-stage chamber 201 so as to be communicated with an upper water hole of the first straight screw drilling tool 30; the inner wall of the lower part of the central pipe 20 corresponding to the secondary chamber 202 is provided with a lower first communicating joint 216 to be communicated with a lower water hole of the first straight screw drilling tool 30, and the inner wall of the upper part of the central pipe 20 corresponding to the secondary chamber 202 is provided with an upper second communicating joint 217 to be communicated with an upper water hole of the second straight screw drilling tool 40; the lower part inner wall of the central tube 20 corresponding to the third-stage chamber 203 is provided with a lower part second communication joint 218 to communicate with the lower water hole of the second straight screw drilling tool 40, and the upper part inner wall of the central tube 20 corresponding to the third-stage chamber 203 is provided with an upper part third communication joint 219 to communicate with the upper water hole of the third straight screw drilling tool 50; the lower inner wall of the central tube 20 corresponding to the fourth-stage chamber 204 is provided with a lower third communication joint 220 to communicate with the lower water hole of the third straight screw drill 50.
All be equipped with transmission shaft 501 in the three straight screw drilling tool, the tip outer wall of transmission shaft 501 is equipped with the transmission external tooth, and reamer bit assembly 10 inner wall is equipped with the transmission internal tooth, and the transmission external tooth of three straight screw drilling tool all meshes with the transmission internal tooth of reamer bit assembly 10, forms planetary gear set to thereby drive the transmission shaft rotation of three straight screw drilling tool through the flush fluid and drive reamer bit assembly 10 and rotate.
A throttle 502 is disposed in the third straight screw drill 50, and a part of the flushing fluid flowing into the third straight screw drill 50 flows into the fourth-stage chamber 204 and then flows to the pilot drill assembly 2 to drive the pilot drill 21 to rotate, and another part of the flushing fluid flows to the reamer bit assembly 10 and is ejected from the water hole 101 of the reamer bit assembly 10 to flush the reamer bit assembly 10.
The outer wall of the lower part of the central tube 20 is sequentially provided with a central tube outer wall, a middle diameter section 221, a small diameter section 222 and a lower connecting thread 223 along the axial direction; the intermediate diameter section 221 has a diameter smaller than the outer wall diameter of the base pipe 20, a primary shoulder 224 is provided between the intermediate diameter section 221 and the outer wall of the base pipe 20, the small diameter section 222 has a diameter smaller than the intermediate diameter section 221, and a secondary shoulder 225 is provided between the small diameter section 222 and the intermediate diameter section 221.
The reamer bit assembly 10 comprises a reamer bit body 102 and an end cap 103 which are sleeved outside the central tube 20; the end cover 103 is vertical to the central tube 20, and the central tube 20 and three straight screw drilling machines vertically penetrate through the end cover 103; the end cover 103 is tightly attached to and sleeved on the middle diameter section 221, one side of the end cover 103 is a primary shoulder 224, and the other side of the end cover 103 is a fixing sleeve 104 sleeved on the middle diameter section 221 so as to axially position the end cover 103; reamer bit body 102 fits snugly over and around small diameter section 222, with secondary shoulder 225 on one side of reamer bit body 102 and compression ring 105 on the other side of reamer bit body 102 over small diameter section 222 to axially locate reamer bit body 102.
The pilot directional drilling assembly 2 comprises an extension drilling tool 24, a measuring system 23, a single-bent screw motor 22 and a directional drilling bit 21 which are sequentially arranged along the axial direction.
Example 2:
a coal mine underground cluster type large-diameter directional drilling and reaming integrated tool comprises a large-diameter directional drilling and reaming device 1 in embodiment 1 and further comprises a pilot directional drilling tool assembly 2.
The water outlet end of the central tube 20 is coaxially connected with the pilot directional drilling tool assembly 2; the flushing fluid can sequentially pass through the first straight screw drilling tool 30, the second straight screw drilling tool 40, the third straight screw drilling tool 50 and the pilot directional drilling tool assembly 2, namely the reaming bit assembly 10 and the directional bit 21 in the pilot directional drilling tool assembly 2 are sequentially driven; the pilot directional drilling tool assembly 2 comprises an extension drilling tool 24, a measuring system 23, a single-bent screw motor 22 and a directional drilling bit 21 which are sequentially arranged along the axial direction; in the present embodiment, the pilot directional drilling assembly 2 is of a conventional arrangement, with the liquid levels of the various components of the assembly being of a conventional configuration.
Example 3:
the embodiment provides a directional drilling and reaming method of a cluster type large-diameter directional drilling and reaming integrated tool in an underground coal mine, and the method adopts the integrated tool in the embodiment 2 to realize the simultaneous operation of the directional drilling and the reaming drilling of a large-diameter drill hole.
The method comprises the following steps:
flushing fluid enters the first-stage cavity from the water inlet end of the central pipe, then enters the first straight screw drilling tool and drives a transmission shaft in the first straight screw drilling tool, flows into the second-stage cavity through the first straight screw drilling tool and then enters the second straight screw drilling tool and drives the transmission shaft in the second straight screw drilling tool, and flows into the third-stage cavity through the second straight screw drilling tool and then enters the third straight screw drilling tool and drives the transmission shaft in the third straight screw drilling tool; the three straight screw drilling tool drives and the reaming bit assembly rotates to realize reaming; meanwhile, a part of flushing liquid flowing into the third straight screw drilling tool flows into the fourth-stage chamber and then enters the pilot directional drilling tool assembly to drive the directional drill bit to realize drilling; and spraying another part of flushing liquid in the third straight screw drilling tool out of a water hole of the reaming bit assembly to flush the reaming bit assembly.
Claims (4)
1. A coal mine underground cluster type large-diameter directional drilling and reaming integrated tool is characterized by comprising a large-diameter directional drilling and reaming device (1) and a pilot directional drilling tool assembly (2);
the major diameter reaming while drilling device (1) comprises: the hole expanding drill bit assembly comprises a hole expanding drill bit assembly (10), a central tube (20) and three straight screw drilling tools which are uniformly distributed around the circumference of the central tube and are parallel to the central tube; the three straight screw drilling tools are respectively a first straight screw drilling tool (30), a second straight screw drilling tool (40) and a third straight screw drilling tool (50), and the side wall of each straight screw drilling tool is provided with an upper water hole and a lower water hole;
a first-stage chamber (201), a second-stage chamber (202), a third-stage chamber (203) and a fourth-stage chamber (204) which are mutually separated are arranged inside the central tube (20), wherein the first-stage chamber (201) is communicated with the water inlet end of the central tube (20) and the water inlet hole of the first straight screw drilling tool (30), the second-stage chamber (202) is communicated with the water outlet hole of the first straight screw drilling tool (30) and the water inlet hole of the second straight screw drilling tool (40), the third-stage chamber (203) is communicated with the water outlet hole of the second straight screw drilling tool (40) and the water inlet hole of the third straight screw drilling tool (50), and the fourth-stage chamber (204) is communicated with the water outlet hole of the third straight screw drilling tool (50) and the water outlet end of the central tube (20);
the reaming bit assembly (10) is sleeved at the water outlet end of the central tube (20), and the reaming bit assembly (10) is in transmission connection with the end parts of the three straight screw drilling tools;
the flushing liquid can sequentially pass through the first straight screw drilling tool (30), the second straight screw drilling tool (40) and the third straight screw drilling tool (50);
a baffle assembly is arranged in the central pipe (20) to divide the central pipe into a first-stage chamber (201), a second-stage chamber (202), a third-stage chamber (203) and a fourth-stage chamber (204);
the baffle assembly comprises a first baffle (205), a second baffle (206), a third baffle (207), a fourth baffle (208) and a fifth baffle (209) which are rectangular and of an integrated structure, wherein one long side of each baffle is distributed along the central axis of the central tube (20), and the other long side of each baffle is tightly attached to the inner wall of the central tube (20); the length of the first baffle (205) is equal to the sum of the lengths of the third baffle (207) and the fourth baffle (208), the length of the second baffle (206) is less than the length of the third baffle (207), and the length of the fifth baffle (209) is less than the length of the fourth baffle (208);
the first baffle (205), the second baffle (206) and the third baffle (207) are radially distributed along the central tube (20) and are positioned at the trisection position of the circumference of the central tube (20), and the second baffle (206) and the third baffle (207) are positioned at the upper part of the first baffle (205); a fourth baffle plate (208) is arranged at the lower part of the first baffle plate (205) and is positioned in the same radial direction as the second baffle plate (206), and a fifth baffle plate (209) is also arranged at the lower part of the first baffle plate (205) and is positioned in the same radial direction as the third baffle plate (207);
a first baffle plate (210) is vertically arranged at the upper ends of the first baffle plate (205), the second baffle plate (206) and the third baffle plate (207), the first baffle plate (210) is of a two-thirds circular structure and is positioned between the first baffle plate (205) and the third baffle plate (207) and between the second baffle plate (206) and the third baffle plate (207); a second baffle plate (211) is vertically arranged at the lower end of the second baffle plate (206), and the second baffle plate (211) is of a one-third round structure and is positioned between the second baffle plate (206) and the first baffle plate (205); a third baffle plate (212) is vertically arranged at the lower end of the third baffle plate (207) and the upper end of the fourth baffle plate (208), and the third baffle plate (212) is of a one-third round structure and is positioned between the third baffle plate (207) and the fourth baffle plate (208); a fourth clapboard (213) is vertically arranged at the upper end of the fifth baffle (209), and the fourth clapboard (213) is of a one-third round structure and is positioned between the first baffle (205) and the fifth baffle (209); a fifth baffle plate (214) is vertically arranged at the lower ends of the first baffle plate (205), the fourth baffle plate (208) and the fifth baffle plate (209), and the fifth baffle plate (214) is of a two-thirds circular structure and is positioned between the first baffle plate (205) and the fourth baffle plate (208) and between the fifth baffle plate (209) and the fourth baffle plate (208);
the primary chamber (201) is defined by the inner wall of the central pipe (20), a first baffle plate (205), a second baffle plate (206) and a second partition plate (211); the secondary chamber (202) is surrounded by the inner wall of the central pipe (20), a first baffle plate (205), a fourth baffle plate (208), a third baffle plate (207), a first partition plate (210), a second partition plate (211), a third partition plate (212) and a fifth partition plate (214); the tertiary chamber (203) is enclosed by the inner wall of the central pipe (20), a first baffle plate (205), a third baffle plate (207), a fourth baffle plate (208), a fifth partition plate (214), a third partition plate (212), a fourth partition plate (213) and a first partition plate (210); the four-stage chamber (204) is enclosed by the inner wall of the central pipe (20), a first baffle (205), a fifth baffle (209) and a fourth partition (213);
the inner wall of the upper part of the central pipe (20) corresponding to the primary chamber (201) is provided with a first upper communication joint (215) so as to be communicated with an upper water hole of the first straight screw drilling tool (30); a lower first communicating joint (216) is arranged on the inner wall of the lower part of the central pipe (20) corresponding to the secondary chamber (202) and communicated with a lower water hole of the first straight screw drilling tool (30), and an upper second communicating joint (217) is arranged on the inner wall of the upper part of the central pipe (20) corresponding to the secondary chamber (202) and communicated with an upper water hole of the second straight screw drilling tool (40); a lower second communication joint (218) is arranged on the inner wall of the lower part of the central pipe (20) corresponding to the third-stage chamber (203) so as to be communicated with a lower water hole of the second straight screw drilling tool (40), and an upper third communication joint (219) is arranged on the inner wall of the upper part of the central pipe (20) corresponding to the third-stage chamber (203) so as to be communicated with an upper water hole of the third straight screw drilling tool (50); a lower third communication joint (220) is arranged on the inner wall of the lower part of the central pipe (20) corresponding to the four-stage chamber (204) and is communicated with a lower water hole of a third straight screw drilling tool (50);
the three straight screw drilling tools are internally provided with transmission shafts (501), the outer walls of the end parts of the transmission shafts (501) are provided with transmission outer teeth, the inner wall of the hole expanding drill bit assembly (10) is provided with transmission inner teeth, and the transmission outer teeth of the three straight screw drilling tools are all meshed with the transmission inner teeth of the hole expanding drill bit assembly (10) to form a planetary gear set so as to drive the transmission shafts of the three straight screw drilling tools to rotate through flushing fluid to drive the hole expanding drill bit assembly (10) to rotate;
the water outlet end of the central pipe (20) is coaxially connected with the pilot directional drilling tool assembly (2); the flushing fluid can sequentially pass through the first straight screw drilling tool (30), the second straight screw drilling tool (40), the third straight screw drilling tool (50) and the pilot directional drilling tool assembly (2), namely the reaming bit assembly (10) and the directional bit (21) in the pilot directional drilling tool assembly (2) are sequentially driven;
the pilot directional drilling tool assembly (2) comprises an extension drilling tool (24), a measuring system (23), a single-bent screw motor (22) and a directional drilling bit (21) which are sequentially arranged along the axial direction.
2. The coal mine underground cluster type large-diameter directional drilling and expanding integrated tool as claimed in claim 1, wherein a throttle valve (502) is arranged in the third straight screw drilling tool (50).
3. The coal mine underground cluster type large-diameter directional drilling and expanding integrated tool is characterized in that the outer wall of the lower portion of the central tube (20) is sequentially provided with a central tube outer wall, a medium-diameter section (221), a small-diameter section (222) and a lower connecting thread (223) along the axial direction; the diameter of the middle-diameter section (221) is smaller than that of the outer wall of the central tube (20), a primary shoulder (224) is arranged between the middle-diameter section (221) and the outer wall of the central tube (20), the diameter of the small-diameter section (222) is smaller than that of the middle-diameter section (221), and a secondary shoulder (225) is arranged between the small-diameter section (222) and the middle-diameter section (221);
the reamer bit assembly (10) comprises a reamer bit body (102) and an end cover (103) which are sleeved outside a central pipe (20); the end cover (103) is vertical to the central pipe (20), and the central pipe (20) and the three straight screw drilling machines vertically penetrate through the end cover (103); the end cover (103) is tightly attached to and sleeved on the middle diameter section (221), one side of the end cover (103) is provided with a primary shoulder (224), and the other side of the end cover (103) is provided with a fixed sleeve (104) sleeved on the middle diameter section (221) so as to axially position the end cover (103); the reaming bit body (102) is tightly attached to and sleeved on the small-diameter section (222), a secondary shoulder (225) is arranged on one side of the reaming bit body (102), and a pressing ring (105) sleeved on the small-diameter section (222) is arranged on the other side of the reaming bit body (102) so as to axially position the reaming bit body (102).
4. A directional drilling and reaming method for a coal mine underground cluster type large-diameter directional drilling and reaming integrated tool is characterized in that the method adopts the integrated tool of claim 1 to realize the simultaneous implementation of the directional drilling and reaming drilling of a large-diameter drill hole; the method comprises the following steps:
flushing fluid enters the first-stage cavity from the water inlet end of the central pipe, then enters the first straight screw drilling tool and drives a transmission shaft in the first straight screw drilling tool, flows into the second-stage cavity through the first straight screw drilling tool and then enters the second straight screw drilling tool and drives the transmission shaft in the second straight screw drilling tool, and flows into the third-stage cavity through the second straight screw drilling tool and then enters the third straight screw drilling tool and drives the transmission shaft in the third straight screw drilling tool; the three straight screw drilling tools drive and the reaming bit assembly to rotate to realize reaming; meanwhile, a part of flushing liquid flowing into the third straight screw drilling tool flows into the four-stage chamber and then enters the pilot directional drilling tool assembly to drive the directional drill bit to realize drilling; and the other part of flushing liquid in the third straight screw drilling tool is sprayed out of the water hole of the reaming bit assembly to flush the reaming bit assembly.
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| CN202110300549.2A CN113090186B (en) | 2021-03-22 | 2021-03-22 | Coal mine underground bundling type large-diameter directional drilling and expanding integrated tool and method |
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| CN202110300549.2A CN113090186B (en) | 2021-03-22 | 2021-03-22 | Coal mine underground bundling type large-diameter directional drilling and expanding integrated tool and method |
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