CN111810087A - Hydraulic large-diameter grading cave-making pressure-relief permeability-increasing device and method - Google Patents
Hydraulic large-diameter grading cave-making pressure-relief permeability-increasing device and method Download PDFInfo
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- CN111810087A CN111810087A CN202010539997.3A CN202010539997A CN111810087A CN 111810087 A CN111810087 A CN 111810087A CN 202010539997 A CN202010539997 A CN 202010539997A CN 111810087 A CN111810087 A CN 111810087A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 103
- 239000007921 spray Substances 0.000 claims abstract description 4
- 239000003245 coal Substances 0.000 claims description 34
- 238000005553 drilling Methods 0.000 claims description 34
- 238000000926 separation method Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 2
- 230000035699 permeability Effects 0.000 abstract description 16
- 238000004080 punching Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 6
- 238000000605 extraction Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
Abstract
The invention relates to the technical field of hydraulic large-diameter grading cave-making pressure relief and permeability increase, in particular to a hydraulic large-diameter grading cave-making pressure relief and permeability increase device, wherein a grading cave-making drill bit is arranged at a position, close to a drill bit, of a grading cave-making drill bit, a grading cave-making drill bit base in the grading cave-making drill bit is fixedly arranged in the drill bit, a hollow water guide shaft is arranged on the grading cave-making drill bit base, a grading cave-making drill bit rotary table is rotatably arranged on the hollow water guide shaft, the tail part of a grading cave-making drill bit jet rod is arranged on the grading cave-making drill bit rotary table, a grading cave-making drill bit jet nozzle is arranged at the head part of the grading cave-making drill bit jet rod, the grading cave-making drill bit jet nozzle sprays water. The hydraulic large-diameter grading cave-making pressure-relief anti-reflection device realizes multiple grading three-dimensional punching cave-making and improves the pressure-relief, anti-reflection and anti-protrusion effects. In addition, the invention also provides a hydraulic large-diameter grading hole-making pressure-releasing permeability-increasing method.
Description
Technical Field
The invention relates to the technical field of hydraulic large-diameter grading, cave-making, pressure-releasing and permeability increasing, in particular to a hydraulic large-diameter grading, cave-making, pressure-releasing and permeability increasing device and method.
Background
Coal mine gas (coal bed gas) is one of important unconventional natural gas resources, and when coal bed gas of a high-gas coal bed is extracted and exploited under a coal mine, whether the good effect of the extraction and exploitation of the coal bed gas of the non-pressure-relief coal bed can be obtained mainly depends on the permeability of the coal bed. However, coal seams in most mining areas in China belong to high-gas low-permeability coal seams, the coal quality is soft, the permeability is poor, the permeability is only 10 < -4 > -10 < -3 > mD, the permeability of the coal seams directly determines the extraction and utilization efficiency of coal mine gas (coal bed gas), and the problem of difficulty in extracting the coal bed gas of the low-permeability coal seams is a key link for ensuring the safety production of coal mines and improving the yield and the utilization rate of the coal bed gas. Research and development of technologies and equipment for improving permeability of a low permeability coal seam and increasing yield of coal bed gas become a difficult and urgent task, so research and development of key technologies and equipment for improving permeability of a coal seam underground which is difficult to pump become an important task to be developed urgently.
Hydraulic cave making means that a great amount of coal is flushed out by high-pressure water jet with the help of bedding drilling holes or cross-layer drilling holes to form a plurality of caverns with larger diameters, and a certain pressure relief gas discharge area is formed in the coal. On one hand, the measure is used for crushing and flushing out a large amount of soft coal bodies in the hydraulic hole making process, thereby playing a role in reducing the ground stress of the coal bodies; on the other hand, the exposed area of the coal seam is increased by the cave formed in the coal seam, and a huge fracture network is formed around the cave, so that a wide space is provided for gas migration and extraction, the permeability of the coal seam is improved, and the gas extraction efficiency and the gas extraction amount can be effectively improved.
The hydraulic punching and cave-making technology is an effective mode for pressure relief and permeability increase of a low-permeability coal seam, after the coal seam enters a deep part, the permeability of the coal seam is further reduced, the ground stress is increased, and the effect of extraction outburst prevention can be ensured only by adopting pressure relief and permeability increase measures with higher strength. For the hydraulic punching and hole making technology, holes with larger radius need to be manufactured. The current hydraulic punching and hole-making technology is limited by a punching method, equipment capability and structure, the maximum hole-making radius is limited and generally does not exceed 0.5 m.
Disclosure of Invention
In order to solve the problems, the hydraulic large-diameter grading hole-making pressure-relief and permeability-increasing device provided by the invention can change the punching process, realize multiple grading and three-dimensional hole-making, break through the limit of hole-making radius of the conventional hydraulic hole-making method, expand the pressure-relief range of the drilled hole and improve the pressure-relief, permeability-increasing and outburst-prevention effects. In addition, the invention also provides a hydraulic large-diameter grading hole-making pressure-releasing permeability-increasing method.
In a first technical scheme, the hydraulic large-diameter grading hole making pressure relief permeability increasing device comprises a drill rod, a drill bit, a drill rod holder, a grading hole making drill bit and a water supply device, wherein the drill bit is installed at the front end of the drill rod, the grading hole making drill bit is installed inside the drill rod and is close to the drill bit at the front section, an outer drill rod notch is formed in the position, opposite to the grading hole making drill bit, of the drill rod, the drill rod holder is clamped at the tail of the drill rod, the drill rod holder can drive the drill bit and the drill rod holder to rotate axially synchronously, and the water supply device is connected with the grading hole making drill bit through a pipeline and supplies water to the grading; the grading hole making drill bit comprises a grading hole making drill bit base, a grading hole making drill bit rotary table, a hollow water guide shaft, at least two groups of grading hole making drill bit jet rods and grading hole making drill bit jet nozzles, wherein the grading hole making drill bit base is fixedly arranged in a drill rod, the hollow water guide shaft is arranged on the grading hole making drill bit base, the grading hole making drill bit rotary table is rotatably arranged on the hollow water guide shaft, the tail part of the grading hole making drill bit jet rod is arranged on the grading hole making drill bit rotary table, the grading hole making drill bit jet nozzles are arranged at the head part of the grading hole making drill bit jet rods, the extension lines of the grading hole making drill bit jet rods are staggered with the axis of the middle slotted hollow water guide shaft, and a rotary table water guide cavity is arranged inside the grading hole making drill;
the water supply device is in butt joint through a pipeline, supplies water to the jet flow rods of the grading hole making drill bits through the pipeline, the middle slotted hollow water guide shaft and the grading hole making drill bit rotary table, sprays water outwards at high pressure through the jet flow nozzles of the grading hole making drill bits, and the grading hole making drill bit rotary table rotates through centrifugal torque force formed by spraying water outwards at high pressure through the jet flow nozzles of the grading hole making drill bits.
In the first technical solution, preferably, the water supply device includes a high pressure resistant water tail, the drill rods include an inner drill rod and an outer drill rod, the drill rod holder includes a first drill rod holder and a second drill rod holder, the outer drill rod is sleeved outside the inner drill rod, the drill bit is installed at the front end of the outer drill rod, the staged hole making drill bit is installed at the front end of the inner drill rod, the high pressure water tail is connected to the tail end of the inner drill rod, the first drill rod holder holds the tail section of the inner drill rod, and the second drill rod holder holds the tail section of the outer drill rod.
In a first technical scheme, as preferred, hierarchical cave-making drill bit base has spring magnetic force separation blade towards hierarchical cave-making drill bit efflux pole one side surface, and this spring magnetic force separation blade sets up on the rotation path of hierarchical cave-making drill bit efflux pole, and this spring magnetic force separation blade is used for attracting hierarchical cave-making drill bit efflux pole when hierarchical cave-making drill bit efflux pole stall, makes hierarchical cave-making drill bit efflux pole accomodate inside outer drilling rod.
In the first technical scheme, preferably, a connecting rod is further arranged in the outer drill rod, and two ends of the connecting rod are respectively connected with the tail of the drill bit and the front end of the grading hole making drill bit.
In the first technical scheme, preferably, the middle slotted hollow water guide shaft is mounted on the graded hole making drill base through a base bearing, a base water guide pipeline communicating the middle slotted hollow water guide shaft with the inner drill rod is arranged in the graded hole making drill base, the base water guide pipeline is welded with the outer wall of the base bearing, and the middle slotted hollow water guide shaft is welded with the inner wall of the base bearing.
In a second technical solution, a hydraulic large-diameter graded hole-making, pressure-releasing and permeability-increasing method using the hydraulic large-diameter graded hole-making, pressure-releasing and permeability-increasing device as in the first technical solution includes the following steps:
step 1, before a hydraulic large-diameter grading hole-making pressure-relief permeability-increasing device performs hole-making operation, an inner drill rod, an outer drill rod, a grading hole-making drill bit and a drill bit are drilled to a hole-making working position by operating a first drill rod holder and a second drill rod holder;
and 4, stopping water supply after full coal thickness cave building is completed, withdrawing the inner drill rod and the grading cave building drill bit, replacing the lengthened grading cave building drill bit jet flow and lengthening the rod, screwing and connecting the inner drill rod and the grading cave building drill bit with the internal screw thread of the drill bit, pushing the inner drill rod and the grading cave building drill bit to the position of a cave building hole, and repeating the step two and the step three to complete large-size grading cave building of the cave building drill bit on the basis of the existing hole.
In the second technical means, it is preferable that the method comprises, after the step 3, a step 31: and (3) after the three-dimensional cave building at the position is completed, stopping water supply, realizing that the jet flow of the graded cave building drill bit can extend the rod to be aligned back under the blocking and magnetic action of the spring magnetic retaining sheet, continuing to drill the inner drill rod, the outer drill rod, the graded cave building drill bit and the drill bit to the next cave building working position, and repeating the step 3 to complete the full-coal-thickness continuous cave building.
In order to achieve the purpose, the invention adopts the technical scheme that:
the beneficial effects of the invention are as follows:
compared with the prior art, the hydraulic large-diameter grading, cave-making, pressure-relief and permeability-increasing device is adopted to generate the horizontal and longitudinal simultaneous rotation of the cave-making drill bit on the basis of drilling and forming of the traditional drilling machine, a large-volume three-dimensional space is formed near a drill hole, continuous drilling is carried out to realize full-coal-thickness continuous cave making, a larger-volume grading three-dimensional cave making can be realized by lengthening the jet flow rod, and the hydraulic large-diameter grading, cave-making, pressure-increasing and pressure-relief device has the advantages of small-size drilling and cave making, simplicity in operation, easiness in control and the like, the scope of the drilling, the manual labor intensity is reduced, the mechanical loss of the drilling tool is reduced, the mine gas control.
Drawings
Fig. 1 is a schematic diagram of a grading hole-making drill bit in the hydraulic large-diameter grading hole-making pressure-relief permeability-increasing device.
Fig. 2 is a schematic side view of a grading cavitation drill bit in the hydraulic large-diameter grading cavitation pressure relief permeability-increasing device.
FIG. 3 is an overall schematic view of the hydraulic large-diameter grading, hole-making, pressure-releasing and permeability-increasing device of the invention.
Fig. 4 is a schematic force diagram of a rotary disc of a graded-hole-making drill bit in the hydraulic large-diameter graded-hole-making pressure-relief permeability-increasing device.
The reference numerals include:
1-high pressure resistant water tail, 2-inner drill rod, 3-first water guide connector, 4-grading cave making drill bit base, 5-grading cave making drill bit rotary table, 6-middle slotted hollow water guide shaft, 7-second water guide connector, 8-grading cave making drill bit jet rod, 9-grading cave making drill bit jet nozzle, 10-grading cave making drill bit, 11-first drill rod holder, 12-second drill rod holder, 13-outer drill rod, 14-connecting rod, 15-drill bit, 16-spring magnetic catch, 20-high pressure water jet reaction force, 21-torque direction, 22-drilling hole, 31-base water guide pipeline, 32-base bearing, 33-rotary table water guide cavity and 34-outer drill rod slotting.
Detailed Description
In order to make the purpose, technical solution and advantages of the present technical solution more clear, the present technical solution is further described in detail below with reference to specific embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present teachings.
Example 1
As shown in fig. 1-4, the hydraulic large-diameter staged hole-making pressure-relief permeability-increasing device proposed in this embodiment includes a drill rod, a drill bit 15, a drill rod holder, a staged hole-making drill bit 10 and a water supply device, wherein the drill bit 15 is installed at the front end of the drill rod, the staged hole-making drill bit 10 is installed inside the drill rod and near the drill bit 15 at the front section, the drill rod has an outer drill rod slot 34 at a position opposite to the staged hole-making drill bit 10, the drill rod holder is held at the tail of the drill rod, the drill rod holder can drive the drill bit 15 and the drill rod holder to rotate axially in synchronization, and the water supply device is connected with the staged hole-making drill bit 10 through a pipeline; the grading cave-making drill 10 comprises a grading cave-making drill base 4, a grading cave-making drill turntable 5, a hollow water guide shaft, at least two groups of grading cave-making drill jet rods 8 and grading cave-making drill jet nozzles 9, wherein the grading cave-making drill base 4 is fixedly arranged in a drill rod, the hollow water guide shaft is arranged on the grading cave-making drill base 4, the grading cave-making drill turntable 5 is rotatably arranged on the hollow water guide shaft, the tail part of the grading cave-making drill jet rod 8 is arranged on the grading cave-making drill turntable 5, the grading cave-making drill jet nozzle 9 is arranged at the head part of the grading cave-making drill jet rod 8, the extension line of the grading cave-making drill jet rod 8 is staggered with the axis of the middle slotted hollow water guide shaft 6, and a turntable water guide cavity 33 is arranged inside the grading cave-making;
the water supply device supplies water to the jet flow rod 8 of the grading cave-making drill bit through a pipeline, the hollow water guide shaft 6 with the middle groove and the grading cave-making drill bit rotary table 5, the jet flow nozzle 9 of the grading cave-making drill bit sprays water outwards at high pressure, and the grading cave-making drill bit rotary table 5 rotates through centrifugal torque force formed by the jet flow nozzle 9 of the grading cave-making drill bit spraying water outwards at high pressure.
The water supply device comprises a high-pressure-resistant water tail 1, the drill rod comprises an inner drill rod 2 and an outer drill rod 13, the drill rod holder comprises a first drill rod holder 11 and a second drill rod holder 12, the outer drill rod 13 is sleeved outside the inner drill rod 2, a drill bit 15 is installed at the front end of the outer drill rod 13, a grading and cave-making drill bit 10 is installed at the front end of the inner drill rod 2, the high-pressure water tail is connected to the tail end of the inner drill rod 2, the first drill rod holder 11 is held at the tail section of the inner drill rod 2, and the second drill rod holder 12 is held at the tail section.
Hierarchical cave drill bit base 4 has spring magnetic force separation blade 16 towards 8 side surfaces of hierarchical cave drill bit efflux pole, and this spring magnetic force separation blade 16 sets up on the rotation path of hierarchical cave drill bit efflux pole 8, and this spring magnetic force separation blade 16 is used for attracting hierarchical cave drill bit efflux pole 8 of making when 8 stall of hierarchical cave drill bit efflux pole, makes hierarchical cave drill bit efflux pole 8 accomodate outside inside drilling rod 13.
A connecting rod 14 is also arranged in the outer drill rod 13, and two ends of the connecting rod 14 are respectively connected with the tail part of a drill bit 15 and the front end of the grading and cave-making drill bit 10.
The middle slotted hollow water guide shaft 6 is installed on the grading cave-making drill base 4 through a base bearing 32, a base water guide pipeline 31 communicating the middle slotted hollow water guide shaft 6 with the inner drill rod 2 is arranged in the grading cave-making drill base 4, the base water guide pipeline 31 is welded with the outer wall of the base bearing 32, and the middle slotted hollow water guide shaft 6 is welded with the inner wall of the base bearing 32.
Specifically, a high-pressure-resistant water tail 1 is connected with an inner drill rod 2, and a grading hole-making drill bit base 4 is connected with the inner drill rod 2 through a first water guide connector 3; the base water guide pipeline 31 is welded with the outer wall of a base bearing 32, the middle slotted hollow water guide shaft 6 is welded with the inner wall of the base bearing 32, the graded hole making drill bit rotary table 5 is in threaded connection with the middle slotted hollow water guide shaft 6, a rotary table water guide cavity 33 is communicated with the inside of the middle slotted hollow water guide shaft 6, the graded hole making drill bit jet nozzle 9 is connected with a graded hole making drill bit 10 jet flow extendable rod, a second water guide connector 7 is connected with the graded hole making drill bit rotary table 5, the upper part of the spring magnetic force catch 16 is a spring catch, the bottom of the spring magnetic force catch is provided with a magnet, the upper catch is positioned on the rotary path of the graded hole making drill bit 10 jet flow extendable rod, and the bottom of the spring magnetic force catch; the grading hole making drill 10 is connected with a drill 15 through a connecting rod 14; the inner drill rod 2 is connected with a drilling machine through a first drill rod holder 11, and the outer drill rod 13 is connected with the drilling machine through the first drill rod holder 11;
further, the grading cave-making drill bit 10 is composed of a grading cave-making drill bit base 4, a grading cave-making drill bit rotary table 5, a middle slotted hollow water guide shaft 6, a second water guide connector 7, a grading cave-making drill bit 10 jet extension bar, a grading cave-making drill bit jet nozzle 9, a spring magnetic catch 16, a base water guide pipeline 31 and a base bearing 32, wherein the length of the grading cave-making drill bit 10 jet extension bar before extension is smaller than the radius of a drilling hole 22.
The grading cave-making drill base 4 is connected with the grading cave-making drill turntable 5 through a middle slotted hollow water guide shaft 6 and a base bearing 32, and a gap is reserved between the two. The two groups of second water guide connectors 7, the grading cave-making drill bit 10 jet flow lengthening rod and the grading cave-making drill bit jet flow nozzle 9 are staggered and not on the same straight line.
The hydraulic large-diameter grading hole making technology and equipment innovate a punching mode and a punching equipment structure, change the punching process and realize multi-time grading three-dimensional punching hole making. Breaking through the limit of the conventional hydraulic hole-making method, enlarging the pressure-relief range of the drill hole 22 and improving the pressure-relief, permeability-increasing and outburst-prevention effects.
Example 2
The hydraulic large-diameter graded hole-making, pressure-releasing and permeability-increasing method provided in this embodiment uses the hydraulic large-diameter graded hole-making, pressure-releasing and permeability-increasing device provided in embodiment 1, and includes the following steps:
step 1, before a hydraulic large-diameter grading hole-making pressure-relief permeability-increasing device performs hole-making operation, an inner drill rod 2, an outer drill rod 13, a grading hole-making drill bit 10 and a drill bit 15 are drilled to a hole-making working position by operating a first drill rod holder 11 and a second drill rod holder 12;
and 2, using the high-pressure resistant water tail 11 of the invention to jet flow through the inner drill rod 2, the first water guide connector 3, the grading hole making drill bit base 4, the grading hole making drill bit rotary table 5, the middle slotted hollow water guide shaft 6, the rotary table water guide cavity 33, the second water guide connector 7 and the grading hole making drill bit 10 to guide water through the extension rod, so that the high-pressure jet flow is sprayed out from the grading hole making drill bit jet flow nozzle 9, two groups of high-pressure jet flow reaction forces act on the grading hole making drill bit rotary table 5, and torque is generated to drive the grading hole making drill bit rotary table 5 to longitudinally rotate at high speed, as shown in a torque direction 22 in fig.
And 4, after the continuous cave making of the full coal thickness is finished, stopping water supply, withdrawing the inner drill rod 2 and the grading cave making drill bit 10, replacing the lengthened grading cave making drill bit 10 to jet the extension rod, screwing and connecting the inner drill rod 22 and the grading cave making drill bit 10 with the internal thread of the drill bit 15, pushing the inner drill rod and the grading cave making drill bit to the position of a hole with a cave made, repeating the step two and the step three, and finishing the large-size grading cave making of the cave making drill bit 15 on the basis of the existing hole.
The foregoing is only a preferred embodiment of the present invention, and many variations in the specific embodiments and applications of the invention may be made by those skilled in the art without departing from the spirit of the invention, which falls within the scope of the claims of this patent.
Claims (7)
1. The utility model provides a hydraulic large-diameter is hierarchical cave release anti-reflection device that makes which characterized in that: the drill rod holder is clamped at the tail part of the drill rod, the drill rod holder can drive the drill bit and the drill rod holder to synchronously axially rotate, and the water supply device is connected with the grading hole making drill bit through a pipeline and supplies water to the grading hole making drill bit; the grading hole making drill bit comprises a grading hole making drill bit base, a grading hole making drill bit rotary table, a hollow water guide shaft, at least two groups of grading hole making drill bit jet rods and grading hole making drill bit jet nozzles, wherein the grading hole making drill bit base is fixedly arranged in a drill rod, the hollow water guide shaft is arranged on the grading hole making drill bit base, the grading hole making drill bit rotary table is rotatably arranged on the hollow water guide shaft, the tail part of the grading hole making drill bit jet rod is arranged on the grading hole making drill bit rotary table, the grading hole making drill bit jet nozzles are arranged at the head part of the grading hole making drill bit jet rods, the extension lines of the grading hole making drill bit jet rods are staggered with the axis of the middle slotted hollow water guide shaft, and a rotary table water guide cavity is arranged inside the grading hole making drill;
the water supply device is in butt joint through a pipeline, supplies water to the jet flow rods of the grading hole making drill bits through the pipeline, the middle slotted hollow water guide shaft and the grading hole making drill bit rotary table, sprays water outwards at high pressure through the jet flow nozzles of the grading hole making drill bits, and the grading hole making drill bit rotary table rotates through centrifugal torque force formed by spraying water outwards at high pressure through the jet flow nozzles of the grading hole making drill bits.
2. The hydraulic large-diameter grading, cave-making, pressure-releasing and anti-reflection device according to claim 1, characterized in that: the water supply installation includes high pressure resistant water tail, the drilling rod includes interior drilling rod and outer drilling rod, the drilling rod holder includes first drilling rod holder and second drilling rod holder, the outside of drilling rod including outer drilling rod suit, the front end of drilling rod outside the drill bit is installed, the front end of drilling rod including hierarchical cave-making drill bit installation, high pressure water tail connects the tail end at interior drilling rod, the tail section of drilling rod including the centre gripping of first drilling rod holder, the tail section of drilling rod outside the centre gripping of second drilling rod holder centre gripping.
3. The hydraulic large-diameter grading, cave-making, pressure-releasing and anti-reflection device according to claim 2, characterized in that: cave drill bit base is made in grades has spring magnetic force separation blade towards hierarchical cave drill bit efflux pole one side surface, and this spring magnetic force separation blade sets up on the rotation path of hierarchical cave drill bit efflux pole, and this spring magnetic force separation blade is used for attracting hierarchical cave drill bit efflux pole when hierarchical cave drill bit efflux pole stall is made in grades, makes hierarchical cave drill bit efflux pole accomodate inside outer drilling rod.
4. The hydraulic large-diameter grading, cave-making, pressure-releasing and anti-reflection device according to claim 3, characterized in that: and a connecting rod is further arranged in the outer drill rod, and two ends of the connecting rod are respectively connected with the tail of the drill bit and the front end of the grading hole making drill bit.
5. The hydraulic large-diameter grading, cave-making, pressure-releasing and anti-reflection device according to claim 3, characterized in that: the middle slotted hollow water guide shaft is mounted on the graded hole making drill bit base through a base bearing, a base water guide pipeline communicated with the middle slotted hollow water guide shaft and the inner drill rod is arranged in the graded hole making drill bit base, the base water guide pipeline is welded with the outer wall of the base bearing, and the middle slotted hollow water guide shaft is welded with the inner wall of the base bearing.
6. A hydraulic large-diameter grading, cave-making, pressure-releasing and permeability-increasing method using the hydraulic large-diameter grading, cave-making, pressure-releasing and permeability-increasing device according to claim 3, characterized by comprising the following steps:
step 1, before a hydraulic large-diameter grading hole-making pressure-relief permeability-increasing device performs hole-making operation, an inner drill rod, an outer drill rod, a grading hole-making drill bit and a drill bit are drilled to a hole-making working position by operating a first drill rod holder and a second drill rod holder;
step 2, using the high-pressure resistant water tail of the invention to guide water through an inner drill rod, a graded hole making drill bit base, a graded hole making drill bit turntable, a middle slotted hollow water guide shaft and a graded hole making drill bit jet lengthening rod, realizing that high-pressure jet is sprayed out from a graded hole making drill bit jet nozzle, reacting force of two groups of high-pressure jet acts on the graded hole making drill bit turntable, and generating torque to drive the graded hole making drill bit turntable to longitudinally rotate at high speed;
step 3, the grading hole making drill bit transversely rotates to make a three-dimensional hole, the jet flow nozzle longitudinally rotates at a high speed, and simultaneously, the drilling machine drives the inner drill rod and the outer drill rod to synchronously and radially rotate through the first drill rod holder and the second drill rod holder respectively, so as to drive the grading hole making drill bit to radially rotate, further drive the jet flow nozzle to radially rotate, and complete the three-dimensional hole making at the position;
and 4, stopping water supply after full coal thickness cave building is completed, withdrawing the inner drill rod and the grading cave building drill bit, replacing the lengthened grading cave building drill bit jet flow and lengthening the rod, screwing and connecting the inner drill rod and the grading cave building drill bit with the internal screw thread of the drill bit, pushing the inner drill rod and the grading cave building drill bit to the position of a cave building hole, and repeating the step two and the step three to complete large-size grading cave building of the cave building drill bit on the basis of the existing hole.
7. The hydraulic large-diameter grading, cave-making, pressure-releasing and permeability-increasing method according to claim 6, characterized in that: comprising, after step 3, step 31: and (3) after the three-dimensional cave building at the position is completed, stopping water supply, realizing that the jet flow of the graded cave building drill bit can extend the rod to be aligned back under the blocking and magnetic action of the spring magnetic retaining sheet, continuing to drill the inner drill rod, the outer drill rod, the graded cave building drill bit and the drill bit to the next cave building working position, and repeating the step 3 to complete the full-coal-thickness continuous cave building.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010539997.3A CN111810087B (en) | 2020-06-12 | 2020-06-12 | Hydraulic large-diameter grading, cave-making, pressure-releasing and permeability-increasing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010539997.3A CN111810087B (en) | 2020-06-12 | 2020-06-12 | Hydraulic large-diameter grading, cave-making, pressure-releasing and permeability-increasing device and method |
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| Publication Number | Publication Date |
|---|---|
| CN111810087A true CN111810087A (en) | 2020-10-23 |
| CN111810087B CN111810087B (en) | 2022-11-08 |
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| CN202010539997.3A Active CN111810087B (en) | 2020-06-12 | 2020-06-12 | Hydraulic large-diameter grading, cave-making, pressure-releasing and permeability-increasing device and method |
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Cited By (1)
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