CN113202416B - Multi-channel double-piston mechanical-hydraulic composite hole-making drilling tool and hole-making method - Google Patents
Multi-channel double-piston mechanical-hydraulic composite hole-making drilling tool and hole-making method Download PDFInfo
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- CN113202416B CN113202416B CN202110491345.1A CN202110491345A CN113202416B CN 113202416 B CN113202416 B CN 113202416B CN 202110491345 A CN202110491345 A CN 202110491345A CN 113202416 B CN113202416 B CN 113202416B
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- 238000005553 drilling Methods 0.000 title claims abstract description 46
- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 238000004080 punching Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 230000011664 signaling Effects 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000009977 dual effect Effects 0.000 claims 1
- 239000003245 coal Substances 0.000 abstract description 24
- 238000005516 engineering process Methods 0.000 abstract description 8
- 102000010637 Aquaporins Human genes 0.000 description 76
- 230000001965 increasing effect Effects 0.000 description 9
- 238000010276 construction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000001028 reflection method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 108010063290 Aquaporins Proteins 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
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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- 239000011241 protective layer Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- 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
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
- E21B10/322—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools cutter shifted by fluid pressure
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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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a multi-channel double-piston mechanical-hydraulic composite hole-making drilling tool and a hole-making method, wherein a pipe body is arranged; according to the flow direction of water flow, a piston is arranged in the pipe body along the axial direction, a hole making opening is arranged on the side wall of the pipe body, a reaming wing piece is arranged at the hole making opening, and the reaming wing piece is mechanically connected with the piston through a turbine vortex rod mechanism; on one hand, the water flow from the piston end converts the axial movement of the piston into the opening movement of the reaming wing pieces to provide power for mechanical force cavitation; on the other hand, the water flow from the piston end passes through the reaming wings for hydraulic cavitation. The multi-stage adjustable and mechanical-hydraulic composite hole making of underground mechanical hole making of the coal mine is realized; realizing the in-place opening and reporting of the mechanical hole making cutter; combines the advantages of mechanical hole making and hydraulic hole making, widens the application range of the hole making technology in coal beds with different hardness, and improves the function and reliability of the hole making drilling tool.
Description
Technical Field
The invention relates to the field of underground tunnel drilling of coal mines and coal and gas control engineering, in particular to a multi-channel double-piston mechanical-hydraulic combined hole making drilling tool and a hole making method.
Background
With the increasing specific gravity of crushed soft coal layers in coal mine production, the problem of gas control is increasingly prominent, and particularly in high-gas low-permeability coal seams of mining areas (wells) without protective layer exploitation conditions, the adoption of permeability-increasing measures for assisting gas extraction is the most widely applied and effective gas control means at present. A large number of practices prove that: the coal seam anti-reflection can enable the coal body to generate more cracks, and the pressure relief and air supply area is enlarged, so that the method is a fundamental way for improving the gas extraction rate of the coal seam. The hole drilling and hole making anti-reflection technology has the remarkable advantages of simple construction operation, high cost performance, obvious anti-reflection effect and the like, and is high in popularization. At present, the drilling hole-making anti-reflection method mainly comprises two types of hydraulic hole-making anti-reflection and mechanical hole-making anti-reflection. The hydraulic cavity-making anti-reflection method has the advantages of high cavity-making efficiency and good anti-reflection effect for the coal layers with the coal-rock firmness coefficient f less than or equal to 0.5, but the cavity-making radius of the coal layers with the coal-rock firmness coefficient f more than 0.5 is obviously reduced along with the increase of the hardness of the coal rocks; compared with the hydraulic hole making method, the mechanical hole making method has more controllable hole making radius, but has lower hydraulic hole making efficiency compared with a crushed soft coal layer, and the prior mechanical hole making drilling tool can not realize multi-stage controllability of in-place opening message and opening angle of a mechanical cutter. Therefore, the advantages of hydraulic hole making and mechanical hole making are necessary to be combined, a mechanical-hydraulic combined hole making technology is provided, the application range of the hole making technology in different coal beds is widened, the functions and the reliability of hole making drilling tools are improved, the actual requirements of crushed soft low-permeability coal seam mining areas in China on coal seam permeability improvement operation are met, and safe and efficient production of the crushed soft low-permeability coal seams is ensured.
Hydraulic hole making technology: when normal drilling construction is performed, the hydraulic hole making device does not work, after the target hole making device is drilled, the hydraulic hole making device is opened by improving the hydraulic pressure, and the conventional hydraulic hole making drilling tool has high hole making efficiency and good permeability increasing effect when the hardness of a coal bed is low.
Mechanical hole making technology: the existing mechanical hole-making drilling tool opening mode mainly comprises a hydraulic opening mode and a rotary opening mode, wherein the hydraulic opening mode is as follows: the hydraulic pressure is lower during normal drilling construction, the mechanical hole making cutter is not opened, and after drilling to the target hole making position, the mechanical hole making cutter is opened by increasing the hydraulic pressure; the rotary opening mode is as follows: during normal drilling construction, the rotation speed of the drilling tool is low, the mechanical hole making cutter is not opened, and after the drilling tool drills into the target hole making point, the mechanical hole making cutter is opened under the action of centrifugal force by increasing the rotation speed of the drilling tool. Compared with the hydraulic cavitation technology, the cavitation radius of mechanical cavitation is more controllable.
The prior art has the following defects:
(1) The existing hydraulic hole making drilling tool has low hole making efficiency and uncontrollable hole making radius when the hardness of the coal bed is high;
(2) The existing mechanical hole-making drilling tool cannot realize the in-place opening signaling and opening angle controllability of a mechanical cutter;
(3) Mechanical hole making techniques, while having relatively controllable hole making radii, are less efficient in making holes in crushed soft coal layers than hydraulic hole making.
Disclosure of Invention
The invention aims to provide a multi-channel double-piston mechanical-hydraulic composite hole making drilling tool and a hole making method, which overcome the defect that the hole making efficiency, the hole making radius, the coal seam adaptability and the like cannot be considered in the prior art.
In order to solve the problems, the technical scheme adopted by the invention comprises the following steps:
A multi-channel double-piston mechanical-hydraulic composite hole-making drilling tool, which is provided with a pipe body; according to the flow direction of water flow, a piston is arranged in the pipe body along the axial direction, a hole making opening is arranged on the side wall of the pipe body, a reaming wing piece is arranged at the hole making opening, and the reaming wing piece is mechanically connected with the piston through a turbine vortex rod mechanism; on one hand, the water flow from the piston end converts the axial movement of the piston into the opening movement of the reaming wing pieces to provide power for mechanical force cavitation; on the other hand, the water flow from the piston end passes through the reaming wings for hydraulic cavitation.
Optionally, the piston comprises a primary piston and a secondary piston which are sequentially arranged according to the flow direction of water flow; a first low-pressure water channel, a second low-pressure water channel and a high-pressure water channel are embedded in the pipe body, a first low-pressure water channel water inlet and a second low-pressure water channel water inlet are arranged in the axial movement range of the primary piston, and a high-pressure water channel water inlet is arranged at the upstream of the axial movement range of the primary piston; the turbine scroll mechanism is mechanically coupled to the secondary piston.
Optionally, the first low-pressure water channel water inlet is positioned at the upstream of the second low-pressure water channel water inlet according to the flow direction of water flow.
Optionally, a primary spring is arranged between the primary piston and the secondary piston; and a secondary spring is arranged between the secondary piston and the turbine scroll mechanism.
Optionally, the reaming wing is embedded with a jet water channel, and the water-passing pin shaft is communicated with the jet water channel and the high-pressure water channel.
Optionally, the turbine scroll mechanism comprises a screw; one end of the screw is provided with a first external screw thread of the screw, the other end of the screw is provided with a second external screw thread of the screw, and the first external screw thread of the screw is mechanically connected with the piston; the second external thread of the screw is meshed with the thread arranged at the root of the reaming wing.
Optionally, a limiting ring is arranged on the inner wall of the pipe body between the piston and the reaming wing, a thrust ball bearing is arranged at the limiting ring, and a screw rod passes through the thrust ball bearing.
Optionally, a first interface is arranged at one end of the pipe body and is used for connecting a drill rod; the other end of the pipe body is provided with a second interface for connecting a drill bit.
The invention relates to a multi-channel double-piston mechanical-hydraulic composite hole making method, which adopts the multi-channel double-piston mechanical-hydraulic composite hole making drilling tool to make holes.
Optionally, the method comprises the following steps:
The first step: when the non-cave-building section normally drills, the water flow pressure is not higher than 2MPa, water flows to the drill bit through the first low-pressure water channel and the second low-pressure water channel to be cooled and punched by the drill bit, and the high-pressure water channel assists in punching;
and a second step of: drilling to a preset jet water channel section, starting a mechanical hole making device, adjusting the water flow pressure to be 2-5 MPa, wherein the water flow pressure does not contain an endpoint value of 5, and gradually opening reaming wings;
And a third step of: after the water flow pressure reaches 5MPa, the reaming wing piece is opened to the maximum, the first-stage piston plugs the first low-pressure water channel and the second low-pressure water channel, water flow passes through the high-pressure water channel to cause water pressure to rise rapidly, in-place signaling of the reaming wing piece is realized, and the jet water channel is opened to form the cave.
The invention has the beneficial effects that:
The multi-stage adjustable and mechanical-hydraulic composite hole making of underground mechanical hole making of the coal mine is realized; realizing the in-place opening and reporting of the mechanical hole making cutter; combines the advantages of mechanical hole making and hydraulic hole making, widens the application range of the hole making technology in coal beds with different hardness, and improves the function and reliability of the hole making drilling tool.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
FIG. 1 is a schematic diagram of a multi-channel dual-piston mechanical-hydraulic composite hole-making drilling tool according to the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;
FIG. 4 is a B-B cross-sectional view of FIG. 2;
the reference numerals in the figures are as follows:
The pipe comprises a 1-pipe body, a 11-first connector, a 12-second connector, a 13-hole making port, a 14-limiting ring, a 2-stage piston, a 3-stage piston, a 31-piston internal thread, a 4-stage spring, a 5-screw, a 51-screw first external thread, a 52-screw second external thread, a 6-stage spring, a 7-thrust ball bearing, an 8-reaming wing, an 81-jet water channel, a 9-water-through pin, a 100-first low-pressure water channel, a 1001 first low-pressure water channel water inlet, a 101-second low-pressure water channel, a 1011-second low-pressure water channel water inlet, a 102-high-pressure water channel and a 1021-high-pressure water channel water inlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It should be apparent that the embodiments described below are only some, but not all embodiments of the present invention, and the present invention is not limited in any way, and all embodiments using the technical solutions of the present embodiment, including simple changes, fall within the scope of the present invention.
In order to achieve the above purpose and achieve the above technical effects, the present invention is realized by the following technical scheme:
Referring to fig. 1-4, a multi-channel double-piston mechanical-hydraulic composite hole making drilling tool is provided with a pipe body 1; according to the flow direction of water flow, a piston is arranged in the pipe body 1 along the axial direction, a hole making opening 13 is arranged on the side wall of the pipe body 1, a hole enlarging wing piece 8 is arranged at the position of the hole making opening 13, and the hole enlarging wing piece 8 is mechanically connected with the piston through a turbine vortex rod mechanism; on one hand, the water flow from the piston end converts the axial movement of the piston into the opening movement of the reaming wing pieces 8 to provide power for mechanical force cavitation; on the other hand, the water flow from the piston end is hydraulically cavitated through the reaming wings 8. The drilling tool can control the opening time and opening in-place signaling of the mechanical cutter through different water pressures during drilling construction, and simultaneously realize high-pressure water required by hydraulic hole making and flushing water separation required by common drilling through the design of an internal water channel, thereby being suitable for different construction processes.
In the embodiment of the disclosure, the piston comprises a primary piston 2 and a secondary piston 3 which are arranged in sequence according to the flow direction of water flow; a first low-pressure water channel 100, a second low-pressure water channel 101 and a high-pressure water channel 102 are embedded in the pipe body 1, a first low-pressure water channel water inlet 1001 and a second low-pressure water channel water inlet 1011 are arranged in the axial movement range of the primary piston 2, and a high-pressure water channel water inlet 1021 is arranged at the upstream of the axial movement range of the primary piston 2; the turbine scroll mechanism is mechanically connected to the secondary piston 3.
In an embodiment of the present disclosure, the first low pressure waterway inlet 1001 is upstream of the second low pressure waterway inlet 1011 in water flow direction. When drilling is performed without hole making, the water pressure is not high, the compression amount of the primary piston 2 pushed by the water pressure is small, and water flows through the 3 water channels, wherein the water flows of the first low-pressure water channel 100 and the second low-pressure water channel 101 flow to the drill bit for cooling the drill bit and discharging rock debris, the water pressure of the high-pressure water channel 102 is the same as the water pressure of the low-pressure water channel, the water quantity is small, and the water flows to the reaming wing 8 to prevent coal dust from blocking the nozzle. When the hole is made and drilling is performed, the water pressure is gradually increased, the primary piston 2 is pushed by the water pressure to compress the primary spring 4, when the primary piston 2 is compressed to be in contact with the secondary piston 3, the first low-pressure water channel 100 is blocked by the primary piston 2, water flow can only flow to the drill bit and the reaming wing 8 through the second low-pressure water channel 101 and the high-pressure water channel 102 respectively, the throttling effect enables the water pressure to be further increased, the primary piston 2 is pushed to drive the secondary piston 3 to move towards the bottom of the hole, the axial movement of the secondary piston 3 is converted into the rotary movement of the screw 5 through the matching of the piston internal thread 31 of the secondary piston 3 and the screw first external thread 51 of the screw 5, the rotary movement is converted into the opening movement of the reaming wing 8 through the left-end worm of the screw 5, when the primary piston 2 is compressed in place, all the first low-pressure water channel 100 and the second low-pressure water channel 101 are blocked, and all water flow can only flow to the reaming wing 8 through the high-pressure water channel 102, the water pressure is rapidly increased, the reaming wing 8 is simultaneously opened in place, and the in-position of the reaming wing 8 can be judged through the step increase of the water pressure. If the primary piston 2 is not compressed in place, even if the pump quantity is opened to the maximum, the water pressure cannot exceed the design value (such as 5 MPa) due to the large total overflow water channel area, and the water pressure is suddenly increased at the moment of completely sealing the first low-pressure water channel 100 and the second low-pressure water channel 101 due to the rapid reduction of the overflow area without changing the pump quantity, and the in-place report judgment of the mechanical hole making drilling tool is realized by observing whether the pump pressure exceeds the design value (5 MPa), so that the cooling flushing of the drill bit, the mechanical hole making and the mechanical-hydraulic composite hole making are gradually realized.
In the embodiment of the disclosure, a primary spring 4 is arranged between the primary piston 2 and the secondary piston 3; a secondary spring 6 is arranged between the secondary piston 3 and the turbine scroll mechanism and is used for retracting the reaming wings 8 after the cavitation is completed.
In the embodiment of the disclosure, the reaming wing 8 is embedded with the jet water channel 81, the water-passing pin shaft 9 is communicated with the jet water channel 81 and the high-pressure water channel 102, and the jet water channel 81 on the reaming wing 8 is particularly used for realizing high-pressure water cavitation.
In an embodiment of the present disclosure, the turbine scroll mechanism includes a screw 5; one end of the screw 5 is provided with a screw first external thread 51, the other end of the screw 5 is provided with a screw second external thread 52, the screw first external thread 51 is mechanically connected with the piston, and the specific screw first external thread 51 is meshed with the piston internal thread 31 of the secondary piston 3; the screw second external thread 52 is meshed with threads arranged at the root of the reaming wing 8, when the water flow pressure from the end of the primary piston 2 pushes the primary piston 2 to axially move, on one hand, the secondary piston 3 is driven to axially move, and through the mechanical connection of the screw first external thread 51 meshed with the piston internal thread 31, axial displacement is converted into axial rotation of the screw 5, and the axial rotation of the screw 5 is converted into radial opening of the reaming wing 8.
In the embodiment of the disclosure, a limiting ring 14 is arranged on the inner wall of the pipe body 1 between the piston and the reaming wing 8, a thrust ball bearing 7 is arranged at the limiting ring 14, and the screw 5 passes through the thrust ball bearing 7. The water-passing pin shaft 9 is fixed on the pipe body 1, the middle part of the water-passing pin shaft 9 is connected with 2 reaming fins 8, and the water-passing pin shaft 9 is used for distributing water in the high-pressure water channel 102 to the jet water channel 81 on the reaming fins 8, so that high-pressure water cavitation is realized.
In the embodiment of the disclosure, one end of the pipe body 1 is provided with a first interface 11 for connecting a drill rod; the other end of the tube body 1 is provided with a second interface 12 for connecting a drill bit. The pipe body 1 is provided with threads at both ends, the left side can be connected with a drilling bit, the right side can be connected with a drill rod, and 3 water channels are arranged on the pipe body and are respectively a first low-pressure water channel 100, a second low-pressure water channel 101 and a high-pressure water channel 102.
The mechanical-hydraulic composite hole making drilling method comprises the following steps:
the invention relates to a multi-channel double-piston mechanical-hydraulic composite hole making method, which adopts the multi-channel double-piston mechanical-hydraulic composite hole making drilling tool to make holes.
The method specifically comprises the following steps:
the first step: when the non-cave-building section normally drills, the water flow pressure is not higher than 2MPa, the water flow flows to the drill bit through the first low-pressure water channel 100 and the second low-pressure water channel 101 for cooling and punching the drill bit, and the high-pressure water channel 102 assists in punching; at the moment, the mechanical cutter is not opened, most water flows to the drill bit through the low-pressure water channel for cooling and punching of the drill bit, and the water flow of the high-pressure water channel is smaller, so that only the auxiliary punching and the high-pressure water channel blocking prevention effects are realized;
And a second step of: drilling to a preset jet water channel section, starting a mechanical hole making device, adjusting the water flow pressure to be 2-5 MPa, wherein the water flow does not contain an endpoint value of 5, and gradually opening reaming wings 8; the opening angle is regulated by the pump pressure, at the moment, most water flows still to the drill bit through the low-pressure water channel for cooling and punching the drill bit, the water flow of the high-pressure water channel 102 is smaller, but the water flow of the high-pressure water channel 102 is gradually increased along with the rising of the pump pressure, so that the functions of cooling a cutter and flushing broken coal dust are realized;
and a third step of: after the water flow pressure reaches 5MPa, the reaming wing piece 8 is opened to the maximum, the first-stage piston 2 plugs the first low-pressure water channel 100 and the second low-pressure water channel 101, water flow passes through the high-pressure water channel 102 to cause the water pressure to rise rapidly, in-place signaling of the reaming wing piece 8 is realized, and the jet water channel 81 is opened to create the cave. At this time, the piston plugs the low-pressure water channel flowing to the drill bit, most of water flows to the jet water channel 81 through the high-pressure water channel 102, the pumping pressure rises rapidly, in-place signaling of the mechanical cutter is realized, the high-pressure jet water channel of the jet water channel 81 is opened to form a hole, the hole forming radius is further enlarged on the basis of the hole forming of the mechanical cutter, and at this time, the hydraulic punching hole forming strength is controlled by adjusting the pumping pressure;
Fourth step: when the designed hole making radius is reached, the pump is stopped, and at the moment, the mechanical cutter withdraws the cutter into the drilling tool under the action of the spring force, and the drilling tool is lifted out of the hole, and hole sealing and extraction are carried out.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the embodiments described above, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations. Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (7)
1. A multi-channel double-piston mechanical-hydraulic composite hole-making drilling tool, which is characterized in that a pipe body (1) is arranged; according to the flow direction of water flow, a piston is arranged in the pipe body (1) along the axial direction, a hole making opening (13) is arranged on the side wall of the pipe body (1), a hole enlarging wing piece (8) is arranged at the position of the hole making opening (13), and the hole enlarging wing piece (8) is mechanically connected with the piston through a turbine vortex rod mechanism;
On one hand, the water flow from the piston end provides power for converting the axial movement of the piston into the opening movement of the reaming wing pieces (8) to perform mechanical force cavitation;
on the other hand, the water flow from the piston end passes through the reaming wing (8) to carry out hydraulic cavitation;
The piston comprises a primary piston (2) and a secondary piston (3) which are sequentially arranged according to the flow direction of water flow;
A first low-pressure water channel (100), a second low-pressure water channel (101) and a high-pressure water channel (102) are embedded in the pipe body (1), a first low-pressure water channel water inlet (1001) and a second low-pressure water channel water inlet (1011) are arranged in the axial movement range of the primary piston (2), and a high-pressure water channel water inlet (1021) is arranged at the upstream of the axial movement range of the primary piston (2);
the turbine vortex rod mechanism is mechanically connected with the secondary piston (3);
the reaming wing pieces (8) are embedded with jet water channels (81), and the water-passing pin shafts (9) are communicated with the jet water channels (81) and the high-pressure water channels (102);
The turbine vortex rod mechanism comprises a screw rod (5);
One end of the screw (5) is provided with a screw first external thread (51), the other end of the screw (5) is provided with a screw second external thread (52), and the screw first external thread (51) is mechanically meshed with the piston internal thread (31) of the secondary piston (3);
the second external thread (52) of the screw is meshed with the thread arranged at the root of the reaming wing (8).
2. The multi-channel dual piston mechanical-hydraulic compound cavitation drill of claim 1, wherein the first low pressure waterway inlet (1001) is upstream of the second low pressure waterway inlet (1011) in water flow direction.
3. The multi-channel double-piston mechanical-hydraulic composite hole-making drilling tool according to claim 2, wherein a primary spring (4) is arranged between the primary piston (2) and the secondary piston (3);
a secondary spring (6) is arranged between the secondary piston (3) and the turbine scroll mechanism.
4. A multi-channel double-piston mechanical-hydraulic composite hole-making drilling tool according to claim 3, characterized in that a limiting ring (14) is arranged on the inner wall of the pipe body (1) between the piston and the reaming wings (8), a thrust ball bearing (7) is arranged at the limiting ring (14), and a screw rod (5) is arranged through the thrust ball bearing (7).
5. The multi-channel double-piston mechanical-hydraulic composite hole-making drilling tool according to any one of claims 4, wherein one end of the pipe body (1) is provided with a first interface (11) for connecting a drill rod;
The other end of the pipe body (1) is provided with a second interface (12) for connecting a drill bit.
6. A multi-channel double-piston mechanical-hydraulic composite hole making method, which is characterized in that the multi-channel double-piston mechanical-hydraulic composite hole making drilling tool is adopted for hole making.
7. The multi-channel double-piston mechanical-hydraulic composite cavitation method of claim 6, comprising:
The first step: when the non-cave-building section normally drills, the water flow pressure is not higher than 2MPa, water flows to the drill bit through the first low-pressure water channel (100) and the second low-pressure water channel (101) for cooling and punching the drill bit, and the high-pressure water channel (102) assists in punching;
and a second step of: drilling to a preset jet water channel section, starting a mechanical hole making device, adjusting the water flow pressure to be 2-5 MPa, and gradually opening reaming wings (8) without 5 endpoint values;
and a third step of: after the water flow pressure reaches 5MPa, the reaming wing piece (8) is opened to the maximum, the first-stage piston (2) plugs the first low-pressure water channel (100) and the second low-pressure water channel (101), the water flow leads to rapid water pressure rising through the high-pressure water channel (102), in-place signaling of the reaming wing piece (8) is realized, and the jet water channel (81) is opened to form the cave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110491345.1A CN113202416B (en) | 2021-05-06 | 2021-05-06 | Multi-channel double-piston mechanical-hydraulic composite hole-making drilling tool and hole-making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110491345.1A CN113202416B (en) | 2021-05-06 | 2021-05-06 | Multi-channel double-piston mechanical-hydraulic composite hole-making drilling tool and hole-making method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113202416A CN113202416A (en) | 2021-08-03 |
| CN113202416B true CN113202416B (en) | 2024-06-04 |
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| CN113445921B (en) * | 2021-08-17 | 2024-06-25 | 河南龙腾新型钻具制造有限公司 | Underground coal mine deep hole composite type hole expanding and making device |
| CN113846971B (en) * | 2021-09-29 | 2024-03-29 | 河南能源化工集团研究总院有限公司 | Mechanical hydraulic drilling and hole-making integrated device and operation method |
| CN113982677A (en) * | 2021-11-18 | 2022-01-28 | 江西地普金刚石工具制造有限公司 | Novel hydraulic reversing structure's cave ware of drawing |
| CN114934748B (en) * | 2022-05-23 | 2024-05-31 | 中煤科工集团西安研究院有限公司 | Hydraulically-controlled air drilling and hole digging device and construction method |
| CN114961589B (en) * | 2022-05-26 | 2023-03-14 | 中国矿业大学 | Spring pin graded control type mechanical hole making drill bit and hole making method thereof |
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