CN112412462A - Hydraulic coal drawing process and equipment integrating soft coal seam drawing - Google Patents
Hydraulic coal drawing process and equipment integrating soft coal seam drawing Download PDFInfo
- Publication number
- CN112412462A CN112412462A CN202011230039.4A CN202011230039A CN112412462A CN 112412462 A CN112412462 A CN 112412462A CN 202011230039 A CN202011230039 A CN 202011230039A CN 112412462 A CN112412462 A CN 112412462A
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- digging
- coal
- drill rod
- hydraulic
- water
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- 239000003245 coal Substances 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008569 process Effects 0.000 title abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 94
- 238000005553 drilling Methods 0.000 claims abstract description 51
- 238000010276 construction Methods 0.000 claims abstract description 21
- 238000005065 mining Methods 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 4
- 238000000605 extraction Methods 0.000 description 7
- 239000007921 spray Substances 0.000 description 7
- 230000035699 permeability Effects 0.000 description 4
- 238000004080 punching Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 101150006257 rig-4 gene Proteins 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C45/00—Methods of hydraulic mining; Hydraulic monitors
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
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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 belongs to the technical field of coal seam gas drainage, and particularly relates to a soft coal seam drilling and digging integrated hydraulic coal digging process and equipment, which solve the problems that in the prior art, drilling is frequently retreated, time is wasted, coal digging efficiency is not high, and gas is easily over-limited after a drill rod is retreated. The invention comprises the following steps: (1) the equipment is installed in place; the method comprises the following steps that a drilling machine is in place, then a sealing drill rod is installed at the front end of the drilling machine, then hydraulic coal taking equipment is installed at the front end of the sealing drill rod, and finally a drill bit is installed at the front end of the hydraulic coal taking equipment; (2) drilling construction; (3) directly carrying out hydraulic coal mining without withdrawing a drill rod after drilling construction is finished; and introducing high-pressure water into the sealed drill rod, starting the drilling machine to push and pull the drill rod back and forth, wherein the high-pressure water passes through the sealed drill rod and the hydraulic coal digging equipment, and then the hydraulic coal digging equipment generates high-pressure jet flow to conduct hydraulic coal digging, so that hydraulic coal digging is achieved while the drill is withdrawn. The coal digging device greatly improves the coal digging efficiency, improves the operation safety and ensures the safe operation.
Description
Technical Field
The invention belongs to the technical field of coal seam gas drainage, and particularly relates to a soft coal seam digging and digging integrated hydraulic coal digging process and equipment.
Background
The gas treatment is the first important task of coal mine safety production, and the gas extraction is the fundamental measure for gas treatment and prevention of coal mine gas disaster accidents. Aiming at the problem that gas extraction of a low-permeability coal seam is difficult, pressure relief and permeability increase measures are mainly adopted, the permeability coefficient of a coal body is increased, and the gas extraction efficiency is improved. In recent years, from the perspective of safety, hydraulic permeability improvement measures have become a trend of pressure relief permeability improvement.
Hydraulic measures such as hydraulic punching for cross-layer drilling, hydraulic scouring and hydraulic coal digging are widely used. At present, hydraulic coal mining is mainly characterized in that after drilling is completed in construction, drill rods in holes are completely withdrawn, hydraulic punching water cutters are installed, then the water cutters are sent into the holes and sent into high-pressure water, hydraulic coal mining can be performed, the hydraulic punching water cutters are withdrawn after the hydraulic coal mining is completed, then the drill rods are installed for drilling, the circulation is performed until the operation is completed, frequent drill withdrawal exists in the construction process, time is wasted, coal mining efficiency is not high, and certain hidden danger of safety due to the fact that gas is out of limit after the drill rods are withdrawn.
Disclosure of Invention
The invention provides a hydraulic coal digging process and equipment integrating soft coal seam digging and digging, and aims to solve the problems that in the prior art, the drill is frequently withdrawn, the time is wasted, the coal digging efficiency is not high, and certain hidden danger exists on safety due to the fact that gas is easily out of limit after a drill rod is withdrawn.
The invention is realized by adopting the following technical scheme: a soft coal seam digging and drawing integrated hydraulic coal drawing process and equipment comprises the following steps: (1) the equipment is installed in place; the method comprises the following steps that a drilling machine is in place, then a sealing drill rod is installed at the front end of the drilling machine, then hydraulic coal taking equipment is installed at the front end of the sealing drill rod, and finally a drill bit is installed at the front end of the hydraulic coal taking equipment;
(2) drilling construction;
(3) directly carrying out hydraulic coal mining without withdrawing a drill rod after drilling construction is finished; and introducing high-pressure water into the sealed drill rod, starting the drilling machine to push and pull the drill rod back and forth, wherein the high-pressure water passes through the sealed drill rod and the hydraulic coal digging equipment, and then the hydraulic coal digging equipment generates high-pressure jet flow to conduct hydraulic coal digging, so that hydraulic coal digging is achieved while the drill is withdrawn.
And (3) further, during the drilling construction in the step (2), introducing static pressure water into the sealed drill rod, then starting the drilling machine, starting drilling construction for drilling, and stopping drilling after the drilling construction is finished.
A hydraulic coal digging device for digging and digging a soft coal seam integrally comprises a drilling machine, a drill rod and a drill bit; also comprises hydraulic coal-drawing equipment;
the hydraulic coal digging equipment comprises a pipe body, wherein one end of the pipe body is provided with a water inlet, the other end of the pipe body is provided with a water outlet, the water outlet is of a round platform structure, one end of the pipe body, which is provided with the water inlet, is connected with a drill rod, and the other end of the pipe body, which is provided with the water outlet, is connected with a drill bit; the pipe wall of the pipe body is provided with a spray head, a plugging device is arranged in the pipe body, the plugging device can move left and right in the pipe body, when the water pressure of the water inlet is smaller than a set value of the plugging device, the plugging device is far away from the water outlet, the water entering the water inlet is discharged from the water outlet, when the water pressure of the water inlet is larger than the set value of the plugging device, the plugging device moves towards the water outlet and is used for plugging the water outlet, the water entering the water inlet is sprayed out of the spray head, and the set value of the plugging device is consistent; the drill rod is a high-pressure sealing drill rod.
Furthermore, the plugging device comprises a spring and a steel ball, the steel ball is fixedly connected with one end of the spring, the other end of the spring is fixedly connected with the inner wall of the water inlet, and the set value of the plugging device is consistent with the elastic force of the spring from the original position to the position where the steel ball plugs the water outlet.
Further, the spring of the plugging device is a pressure spring.
Compared with the prior art, the invention has the beneficial effects that:
1. the process can directly carry out hydraulic coal extraction on the drill hole after the drilling construction is finished, and does not need to withdraw the drill rod in the hole, disassemble the drill rod and install the water jet cutter, and then send the water jet cutter into the drill hole to carry out hydraulic coal extraction, so that the process is quick, simple and convenient, the coal extraction efficiency is greatly improved, the operation safety is improved, and the safe operation is ensured;
2. the device has the advantages of simple structure, low manufacturing cost, convenient and quick operation, no need of frequently dismounting and mounting the drill rod and the water jet cutter, and realization of hydraulic coal mining while retreating the rod after drilling.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a hydraulic coal mining device through which water flows during drilling construction according to the present invention;
FIG. 3 is a schematic view of water flowing through a hydraulic coal mining apparatus when hydraulic coal mining;
in the figure: 1-pipe body, 1.1-water inlet, 1.2-water outlet, 1.3-spray head, 2-drill rod, 3-plugging device, 3.1-spring, 3.2-steel ball, 4-drilling machine, 5-drill bit, 6-hydraulic coal-drawing equipment and 7-coal bed.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The direction of the arrows in fig. 2 and 3 is the direction of water flow.
Referring to fig. 1 to 3, the present invention provides a technical solution: a soft coal seam digging and digging integrated hydraulic coal digging process and equipment comprise the following steps:
(1) the equipment is installed in place; the method comprises the following steps that a drilling machine is in place, then a sealing drill rod is installed at the front end of the drilling machine, then hydraulic coal taking equipment is installed at the front end of the sealing drill rod, and finally a drill bit is installed at the front end of the hydraulic coal taking equipment;
(2) drilling construction;
(3) directly carrying out hydraulic coal mining without withdrawing a drill rod after drilling construction is finished; static pressure water in the sealed drill rod is switched into high-pressure water, the drilling machine is started, the high-pressure water enters the hydraulic coal digging device through the sealed drill rod and the hydraulic coal digging device and is sprayed out from the spray head to form high-pressure jet flow, the drill rod is pushed and pulled back and forth to conduct hydraulic coal digging, and therefore the purpose that hydraulic coal digging is conducted while drilling is withdrawn is achieved.
And (3) in the drilling construction in the step (2), introducing static pressure water into the sealed drill rod, then starting the drilling machine, starting drilling construction for drilling, and stopping drilling after the drilling construction is finished.
The apparatus comprises a drilling rig 4, a drill rod 2 and a drill bit 5; also comprises hydraulic coal-drawing equipment;
the hydraulic coal digging equipment comprises a pipe body 1, wherein one end of the pipe body 1 is provided with a water inlet 1.1, the other end of the pipe body is provided with a water outlet 1.2, the water outlet 1.2 is of a circular truncated cone structure, one end of the pipe body 1, which is provided with the water inlet 1.1, is connected with a drill rod 2, and one end of the pipe body 1, which is provided with the water outlet 1.2, is connected with a drill bit 5; the pipe wall of the pipe body 1 is provided with a spray head 1.3, a plugging device 3 is arranged in the pipe body 1, the plugging device 3 can move left and right in the pipe body 1, when the water pressure of the water inlet 1.1 is smaller than the set value of the plugging device 3, the plugging device 3 is far away from the water outlet 1.2, the water entering the water inlet 1.1 is discharged from the water outlet 1.2, when the water pressure of the water inlet 1.1 is larger than the set value of the plugging device 3, the plugging device 3 moves towards the water outlet 1.2 and is used for plugging the water outlet 1.2, the water entering the water inlet 1.1 is sprayed out from the spray head 1.3, and the set value of the plugging device 3 is; the drill rod 2 is a high-pressure sealing drill rod.
The plugging device 3 comprises a spring 3.1 and a steel ball 3.2, the steel ball 3.2 is fixedly connected with one end of the spring 3.1, the other end of the spring 3.1 is fixedly connected with the inner wall of the water inlet 1.1, and the plugging pressure set value of the plugging device 3 is consistent with the elastic force of the spring 3.1 deforming from the original position to the position of the steel ball 3.2 plugging the water outlet.
The spring 3.1 of the plugging device 3 is a pressure spring.
As shown in fig. 2, when the water pressure of the water entering the water inlet 1.1 is less than the set value of the plugging device 3 (5 Mpa is used in the operation), the spring 3.1 is not deformed, the steel ball 3.2 cannot swing, and finally the water flows into the drill bit 5 from the water outlet 1.2, and the drill bit is normally drilled.
As shown in fig. 3, when the water pressure of the water entering the water inlet 1.1 is greater than the set value of the blocking device 3 (5 Mpa is used in this operation), the spring 3.1 is compressed and deformed in the direction of the water outlet 1.2 after receiving the water pressure, so that the steel ball 3.2 moves towards the water outlet 1.2, finally the steel ball 3.2 blocks the drill bit 5, and at the moment, the water is sprayed out from the spray nozzle 1.3 to start coal extraction.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (5)
1. A soft coal seam digging and digging integrated hydraulic coal digging method is characterized in that: the method comprises the following steps:
(1) the equipment is installed in place; the method comprises the following steps that a drilling machine is in place, then a sealing drill rod is installed at the front end of the drilling machine, then hydraulic coal taking equipment is installed at the front end of the sealing drill rod, and finally a drill bit is installed at the front end of the hydraulic coal taking equipment;
(2) drilling construction;
(3) directly carrying out hydraulic coal mining without withdrawing a drill rod after drilling construction is finished; and introducing high-pressure water into the sealed drill rod, starting the drilling machine to push and pull the drill rod back and forth, wherein the high-pressure water passes through the sealed drill rod and the hydraulic coal digging equipment, and then the hydraulic coal digging equipment generates high-pressure jet flow to conduct hydraulic coal digging, so that hydraulic coal digging is achieved while the drill is withdrawn.
2. The soft coal seam digging and digging integrated hydraulic coal digging method according to claim 1, characterized in that: and (3) in the drilling construction in the step (2), introducing static pressure water into the sealed drill rod, then starting the drilling machine, starting drilling construction for drilling, and stopping drilling after the drilling construction is finished.
3. The hydraulic coal mining equipment for the soft coal seam mining integrated hydraulic coal mining method according to claim 1, comprising a drilling machine (4), a drill rod (2) and a drill bit (5); the method is characterized in that: also comprises hydraulic coal-drawing equipment;
the hydraulic coal digging equipment comprises a pipe body (1), wherein one end of the pipe body (1) is provided with a water inlet (1.1), the other end of the pipe body is provided with a water outlet (1.2), the water outlet (1.2) is of a circular truncated cone structure, one end of the pipe body (1) provided with the water inlet (1.1) is connected with a drill rod (2), and one end of the pipe body (1) provided with the water outlet (1.2) is connected with a drill bit (5); a nozzle (1.3) is arranged on the pipe wall of the pipe body (1), a plugging device (3) is arranged in the pipe body (1), the plugging device (3) can move left and right in the pipe body (1), when the water pressure of the water inlet (1.1) is smaller than a set value of the plugging device (3), the plugging device (3) is far away from the water outlet (1.2), water entering the water inlet (1.1) is discharged from the water outlet (1.2), when the water pressure of the water inlet (1.1) is larger than the set value of the plugging device (3), the plugging device (3) moves towards the water outlet (1.2) and is used for plugging the water outlet (1.2), the water entering the water inlet (1.1) is sprayed out from the nozzle (1.3), and the set value of the plugging device (3) is consistent with the water pressure required by hydraulic coal mining; the drill rod (2) is a high-pressure sealing drill rod.
4. The soft coal seam digging and digging integrated hydraulic coal digging method according to claim 3, characterized in that: the blocking device (3) comprises a spring (3.1) and a steel ball (3.2), the steel ball (3.2) is fixedly connected with one end of the spring (3.1), the other end of the spring (3.1) is fixedly connected with the inner wall of the water inlet (1.1), and the set value of the blocking device (3) is consistent with the elastic force of the spring (3.1) from the original position to the position of the steel ball (3.2) for blocking the water outlet (1.2).
5. The soft coal seam digging and drawing integrated hydraulic coal drawing method according to claim 4, is characterized in that: the spring (3.1) of the plugging device (3) is a pressure spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011230039.4A CN112412462A (en) | 2020-11-06 | 2020-11-06 | Hydraulic coal drawing process and equipment integrating soft coal seam drawing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011230039.4A CN112412462A (en) | 2020-11-06 | 2020-11-06 | Hydraulic coal drawing process and equipment integrating soft coal seam drawing |
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| Publication Number | Publication Date |
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| CN112412462A true CN112412462A (en) | 2021-02-26 |
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| CN202011230039.4A Pending CN112412462A (en) | 2020-11-06 | 2020-11-06 | Hydraulic coal drawing process and equipment integrating soft coal seam drawing |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201090139Y (en) * | 2007-10-11 | 2008-07-23 | 中国矿业大学 | Press control drill scalpel integration drilling bit |
| CN203978282U (en) * | 2014-08-01 | 2014-12-03 | 四川省华蓥山煤业股份有限公司绿水洞煤矿 | A kind of automatic-switching type hydraulic flushing in hole ejector |
| CN107435519A (en) * | 2016-05-27 | 2017-12-05 | 徐州博安科技发展有限责任公司 | Low discharge creeps into high flow capacity seam cutting drill bit |
| CN111088992A (en) * | 2020-01-13 | 2020-05-01 | 煤科集团沈阳研究院有限公司 | Ball throwing type high-pressure hydraulic drilling and cutting integrated penetration increasing device and penetration increasing method |
-
2020
- 2020-11-06 CN CN202011230039.4A patent/CN112412462A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201090139Y (en) * | 2007-10-11 | 2008-07-23 | 中国矿业大学 | Press control drill scalpel integration drilling bit |
| CN203978282U (en) * | 2014-08-01 | 2014-12-03 | 四川省华蓥山煤业股份有限公司绿水洞煤矿 | A kind of automatic-switching type hydraulic flushing in hole ejector |
| CN107435519A (en) * | 2016-05-27 | 2017-12-05 | 徐州博安科技发展有限责任公司 | Low discharge creeps into high flow capacity seam cutting drill bit |
| CN111088992A (en) * | 2020-01-13 | 2020-05-01 | 煤科集团沈阳研究院有限公司 | Ball throwing type high-pressure hydraulic drilling and cutting integrated penetration increasing device and penetration increasing method |
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Application publication date: 20210226 |