阅读说明：本技术 一种水射流钻机及煤层羽状瓦斯抽采钻孔施工方法 (Water jet drilling machine and coal seam feathery gas extraction drilling construction method ) 是由 李江涛 王宇鹍 仇海生 刘晓辉 孙文静 张红奎 马文伟 梁文勖 王魁军 于 2020-06-12 设计创作，主要内容包括：本发明涉及一种水射流钻机,包括钻机主体机械连接钻机内钻杆夹持器、钻机外钻杆夹持器,特点在于：钻机外钻杆夹持器侧设有360°方位标识盘,每节外钻杆端头外侧设有水射流喷嘴方向标识,外钻杆前端固定有柔性钻杆回转器,外部高压胶管经水辫连接的内钻杆连接柔性高压胶管,柔性高压胶管前端经柔性钻杆回转器段后连接水射流喷嘴。还公开了一种水射流钻机的煤层羽状瓦斯抽采钻孔施工方法,可根据需要定向施工水射流羽状钻孔,扩大了抽采钻孔的瓦斯抽采范围,增加了卸压面积,特别适应低透气性硬煤层的瓦斯抽采,如无烟煤煤层瓦斯抽采,有效增加本煤层的瓦斯抽放效果。(The invention relates to a water jet drilling machine, which comprises a drilling machine main body which is mechanically connected with a drilling machine inner drill rod holder and a drilling machine outer drill rod holder, and is characterized in that: the side of a drill rod holder outside the drilling machine is provided with a 360-degree azimuth identification disc, the outer side of the end head of each section of outer drill rod is provided with a water jet nozzle direction identification, the front end of the outer drill rod is fixed with a flexible drill rod gyrator, an outer high-pressure rubber pipe is connected with a flexible high-pressure rubber pipe through an inner drill rod connected by a water braid, and the front end of the flexible high-pressure rubber pipe is connected with a water jet nozzle through a section of the flexible drill. The water jet flow feathered drill hole can be directionally constructed according to needs, the gas extraction range of the extraction drill hole is expanded, the pressure relief area is increased, the method is particularly suitable for gas extraction of a low-permeability hard coal seam, such as gas extraction of a anthracite coal seam, and the gas extraction and drainage effect of the coal seam is effectively improved.)

1. A water jet drilling machine comprises a drilling machine body, wherein the drilling machine body is mechanically connected with an inner drill rod holder and an outer drill rod holder of the drilling machine, and is characterized in that: the side of a drill rod holder outside the drilling machine is provided with a 360-degree azimuth identification disc, the outer side of the end head of each section of outer drill rod is provided with a water jet nozzle direction identification, the front end of the outer drill rod is fixed with a flexible drill rod gyrator, an outer high-pressure rubber pipe is connected with a flexible high-pressure rubber pipe through an inner drill rod connected by a water braid, and the front end of the flexible high-pressure rubber pipe is connected with a water jet nozzle through a section of the flexible drill.

2. A waterjet drilling machine according to claim 1, characterized in that: and a plurality of shaft rings are arranged in the flexible drill rod gyrator.

3. A waterjet drilling machine according to claim 1, characterized in that: the 360-degree azimuth marking disc is fixed on a drill rod clamp holder outside the drilling machine through a fixing hole, the 360-degree azimuth marking disc is composed of a dial disc which is arranged on a base and provided with an angle adjusting handle, a half-side gland is arranged on the upper portion of the dial disc to form a cavity for adjusting the angle, a drill rod hole is arranged in the middle of the 360-degree azimuth marking disc, a fastening screw is arranged from the outer side of the base to form the 360-degree azimuth marking disc, and the dial disc of the 360-degree azimuth marking disc is marked with 0-360-degree scales and is provided with a water drop.

4. A waterjet drilling machine according to claim 2, characterized in that: the 360-degree azimuth marking disc is fixed on a drill rod clamp holder outside the drilling machine through a fixing hole, the 360-degree azimuth marking disc is composed of a dial disc which is arranged on a base and provided with an angle adjusting handle, a half-side gland is arranged on the upper portion of the dial disc to form a cavity for adjusting the angle, a drill rod hole is arranged in the middle of the 360-degree azimuth marking disc, a fastening screw is arranged from the outer side of the base to form the 360-degree azimuth marking disc, and the dial disc of the 360-degree azimuth marking disc is marked with 0-360-degree scales and is provided with a water drop.

5. A water jet drilling machine according to any one of claims 1-4, characterized in that: the 360-degree azimuth marking disc can also be fixed on the drilling machine main body.

6. A coal seam pinnate gas extraction drilling construction method of a water jet drilling machine comprises the steps of drilling a main drilling hole in a coal seam and withdrawing a drilling rod, and is characterized in that: a water jet drilling machine is utilized, an outer drill rod with a flexible drill rod gyrator is inserted into the bottom of a main drilling hole of a coal seam, the outer drill rod is fixed on a drilling machine main body by a drilling machine outer drill rod clamp, an inner drill rod is fixed on the drilling machine main body by a drilling machine inner drill rod clamp, a water jet nozzle is enabled to be arranged in the flexible drill rod gyrator, a 360-degree azimuth marking disc fixed on the drilling machine outer drill rod clamp is used for pushing and pulling an angle adjusting handle, a water drop gradienter is enabled to be in a horizontal state, after a fastening screw rod is screwed to fix a dial, the outer drill rod is rotated, the direction marking position of the water jet nozzle is enabled to be aligned with the 0-degree position of the dial, a water jet drilling machine is started, the inner drill rod is enabled to drill for L meters, a 0-degree position water jet feather-shaped drilling hole of the 360-degree azimuth marking disc is formed, the inner drill, pushing and pulling an angle-adjusting handle to enable a water drop level meter to be in a horizontal state, screwing a fastening screw rod to fix a dial, rotating an outer drill rod to enable a water jet nozzle direction marking position to be aligned with 180 degrees of the dial, starting a water jet drilling machine to enable an inner drill rod to drill for L meters to form a 180-degree water jet feather-shaped drilling hole of a 360-degree azimuth marking disc, withdrawing the inner drill rod, enabling the water jet nozzle to be aligned with 180 degrees of the 360-degree azimuth marking disc, withdrawing the inner drill rod and the outer drill rod from the flexible drill rod rotator, enabling the water jet nozzle direction marking to still be aligned with 180 degrees of the 360-degree azimuth marking disc, starting the water jet drilling machine to enable the inner drill rod to drill for L meters to form a 180-degree water jet feather-shaped drilling hole of the 360-degree azimuth marking disc, withdrawing the inner drill rod to enable the water jet nozzle to be aligned with the flexible drill rod rotator, and using the, the angle adjusting handle is pushed and pulled to enable the water drop level meter to be in a horizontal state, the fastening screw is screwed down to fix the dial, the outer drill rod is rotated to enable the direction marking position of the water jet nozzle to be aligned with 0-degree position of the dial, the water jet drilling machine is started to enable the inner drill rod to drill for L meters, a 0-degree position water jet pinnate drilling hole of the 360-degree azimuth marking disc is formed, the inner drill rod is withdrawn, the water jet nozzle is enabled to be arranged in the flexible drill rod rotator, the inner drill rod and the outer drill rod are pulled out for H meters, the direction marking of the water jet nozzle is still aligned with 0-degree position of the 360-degree azimuth marking disc, the water jet drilling machine is started to enable the inner drill rod to drill for L meters, and a 0-degree position water jet pinnate.

7. The coal seam feathered gas extraction drilling construction method of the water jet drilling machine as claimed in claim 6, wherein the method comprises the following steps: and repeating the construction process to form all water jet plume-shaped drill holes.

8. The coal seam feathered gas extraction drilling construction method of the water jet drilling machine as claimed in claim 6, wherein the method comprises the following steps: l is more than or equal to 25 meters and more than or equal to 15 meters, H is integral multiple of the effective length of each section of outer drill rod, and H is more than or equal to 10 meters and more than or equal to 4 meters.

9. The coal seam feathered gas extraction drilling construction method of the water jet drilling machine according to claim 7 is characterized in that: l is more than or equal to 25 meters and more than or equal to 15 meters, H is integral multiple of the effective length of each section of outer drill rod, and H is more than or equal to 10 meters and more than or equal to 4 meters.

10. The coal seam feathered gas extraction drilling construction method of the water jet drilling machine according to any one of claims 6 to 9, characterized in that: the 0-degree angle of the water jet feathery drilling hole at the 0-degree position of the 360-degree azimuth marking disc can be selected and determined within the range of 0-360 degrees, the 180-degree angle of the water jet feathery drilling hole at the 180-degree position of the 360-degree azimuth marking disc can be selected and determined within the range of 0-360 degrees, and the number of the water jet feathery drilling holes can be determined according to requirements.

Technical Field

The invention relates to a water jet drilling machine and a gas extraction drilling construction method, in particular to a water jet drilling machine and a coal seam feathered gas extraction drilling construction method.

Background

The improvement of the gas drainage effect of the low-permeability coal seam is an important direction and subject in the field of coal mine safety all the time, the traditional underground hydraulic punching, hydraulic hole making and hydraulic loosening are influenced by submerged jet flow and the like, the pressure relief influence range is not large, the effect cannot meet the requirement, and the hydraulic fracturing cannot form effective fracturing, so that the gas permeability of the coal seam is improved, and the effect is not ideal. The ultra-short radius radial rotation technology for drilling the coal seam under the coal mine can drill gas circulation channels (drill holes) with the length of 20-50 meters in the range of 4-10 meters (left and right intervals) from left to right in a drilling plane, enlarge the control range and the pressure relief area of the drill holes, improve the air permeability coefficient of the coal seam and effectively increase the gas extraction effect of the coal seam.

The regional outburst prevention measure for gas extraction by cross-layer drilling is characterized in that due to the low gas permeability of a coal seam and other reasons, in order to meet the requirement of coal mine gas extraction indexes, the drilling intervals of some mining areas are reduced to 5 multiplied by 5 meters, and the drilling engineering quantity is large.

In order to effectively solve the problem, a water jet drilling method capable of turning drilling is adopted, and the coal seam is used for drilling holes, water jet drilling in the coal seam is carried out at different positions in the drilled holes in different directions, so that a drill hole in a feather-shaped interconnection is formed in the coal seam, the air permeability coefficient of the coal seam is effectively increased, and the gas extraction effect is improved. However, at present, a water jet drilling machine with corresponding orientation is lacked, and the coal seam feathery gas extraction drilling construction method cannot be realized.

Disclosure of Invention

The invention aims to provide a water jet drilling machine and a coal seam feathered gas extraction drilling construction method, which overcome the defects of the prior art, enlarge the gas extraction range of an extraction drilling hole and increase the pressure relief area.

The technical scheme adopted by the invention for solving the technical problems is as follows: a water jet drilling machine comprises a drilling machine body, wherein the drilling machine body is mechanically connected with an inner drill rod holder and an outer drill rod holder of the drilling machine, and the water jet drilling machine is characterized in that: the side of a drill rod holder outside the drilling machine is provided with a 360-degree azimuth identification disc, the outer side of the end head of each section of outer drill rod is provided with a water jet nozzle direction identification, the front end of the outer drill rod is fixed with a flexible drill rod gyrator, an outer high-pressure rubber pipe is connected with a flexible high-pressure rubber pipe through an inner drill rod connected by a water braid, and the front end of the flexible high-pressure rubber pipe is connected with a water jet nozzle through a section of the flexible drill.

Wherein: a plurality of shaft rings are arranged in the flexible drill rod gyrator.

Wherein: the 360-degree azimuth marking disc is fixed on a drill rod clamp holder outside the drilling machine through a fixing hole, the 360-degree azimuth marking disc is composed of a dial disc which is arranged on a base and provided with an angle adjusting handle, a half-side gland is arranged on the upper portion of the dial disc to form a cavity for adjusting the angle, a drill rod hole is arranged in the middle of the 360-degree azimuth marking disc, a fastening screw rod is arranged from the outer side of the base, and the dial disc of the 360-degree azimuth marking disc is marked with 0-360-degree scales and provided with a water drop level indicator.

Wherein the 360-degree azimuth marking disc can also be fixed on the drilling machine main body.

A coal seam pinnate gas extraction drilling construction method of a water jet drilling machine comprises the steps of drilling a main drilling hole in a coal seam and withdrawing a drilling rod, and is characterized in that: a water jet drilling machine is utilized, an outer drill rod with a flexible drill rod gyrator is inserted into the bottom of a main drilling hole of a coal seam, the outer drill rod is fixed on a drilling machine main body by a drilling machine outer drill rod clamp, an inner drill rod is fixed on the drilling machine main body by a drilling machine inner drill rod clamp, a water jet nozzle is enabled to be arranged in the flexible drill rod gyrator, a 360-degree azimuth marking disc fixed on the drilling machine outer drill rod clamp is used for pushing and pulling an angle adjusting handle, a water drop gradienter is enabled to be in a horizontal state, after a fastening screw rod is screwed to fix a dial, the outer drill rod is rotated, the direction marking position of the water jet nozzle is enabled to be aligned with the 0-degree position of the dial, a water jet drilling machine is started, the inner drill rod is enabled to drill for L meters, a 0-degree position water jet feather-shaped drilling hole of the 360-degree azimuth marking disc is formed, the inner drill, pushing and pulling an angle-adjusting handle to enable a water drop level meter to be in a horizontal state, screwing a fastening screw rod to fix a dial, rotating an outer drill rod to enable a water jet nozzle direction marking position to be aligned with 180 degrees of the dial, starting a water jet drilling machine to enable an inner drill rod to drill for L meters to form a 180-degree water jet feather-shaped drilling hole of a 360-degree azimuth marking disc, withdrawing the inner drill rod, enabling the water jet nozzle to be aligned with 180 degrees of the 360-degree azimuth marking disc, withdrawing the inner drill rod and the outer drill rod from the flexible drill rod rotator, enabling the water jet nozzle direction marking to still be aligned with 180 degrees of the 360-degree azimuth marking disc, starting the water jet drilling machine to enable the inner drill rod to drill for L meters to form a 180-degree water jet feather-shaped drilling hole of the 360-degree azimuth marking disc, withdrawing the inner drill rod to enable the water jet nozzle to be aligned with the flexible drill rod rotator, and using the, the angle adjusting handle is pushed and pulled to enable the water drop level meter to be in a horizontal state, the fastening screw is screwed down to fix the dial, the outer drill rod is rotated to enable the direction marking position of the water jet nozzle to be aligned with 0-degree position of the dial, the water jet drilling machine is started to enable the inner drill rod to drill for L meters, a 0-degree position water jet pinnate drilling hole of the 360-degree azimuth marking disc is formed, the inner drill rod is withdrawn, the water jet nozzle is enabled to be arranged in the flexible drill rod rotator, the inner drill rod and the outer drill rod are pulled out for H meters, the direction marking of the water jet nozzle is still aligned with 0-degree position of the 360-degree azimuth marking disc, the water jet drilling machine is started to enable the inner drill rod to drill for L meters, and a 0-degree position water jet pinnate.

Wherein: and repeating the construction process to form all water jet plume-shaped drill holes.

Wherein: l is more than or equal to 25 meters and more than or equal to 15 meters, H is integral multiple of the effective length of each section of outer drill rod, and H is more than or equal to 10 meters and more than or equal to 4 meters.

Wherein: the 0-degree angle of the water jet feathery drilling hole at the 0-degree position of the 360-degree azimuth marking disc can be selected and determined within the range of 0-360 degrees, the 180-degree angle of the water jet feathery drilling hole at the 180-degree position of the 360-degree azimuth marking disc can be selected and determined within the range of 0-360 degrees, and the number of the water jet feathery drilling holes can be determined according to requirements.

The corresponding method derived from the coal seam feathery gas extraction drilling construction method of the water jet drilling machine is also within the protection range.

The invention has the beneficial effects that: the water jet drilling machine is used for realizing the construction of the coal seam feathery gas extraction drill hole from the main drill hole, the water jet feathery drill hole can be directionally constructed according to the requirement, the gas extraction range of the extraction drill hole is expanded, the pressure relief area is increased, the water jet drilling machine is particularly suitable for the gas extraction of the low-permeability hard coal seam, such as the gas extraction of the anthracite coal seam, and the gas extraction and drainage effect of the coal seam is effectively improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural diagram of a water jet drilling machine according to the present invention;

FIG. 2 is a schematic structural view of a 360-degree azimuth marking plate according to the present invention;

FIG. 3 is a schematic view of the cross-sectional structure A-A of FIG. 2;

FIG. 4 is a schematic diagram of a coal seam feathered gas extraction drilling structure of the water jet drilling machine.

In the figure: 1. the drilling machine comprises a drilling machine body, 2. a drilling machine inner drill rod clamp, 3. a drilling machine outer drill rod clamp, 4. an outer drill rod, 5.360-degree azimuth marking disc, 6. a water jet nozzle direction marker, 7. a flexible drill rod gyrator, 8. an outer high-pressure rubber pipe, 9. a water swivel, 10. an inner drill rod, 11. a flexible high-pressure rubber pipe, 12. a water jet nozzle, 71. a collar, 100. a coal bed, 200. a main drilling hole, a water jet feather-shaped drilling hole at 0-degree position of 300.360-degree azimuth marking disc, a water jet feather-shaped drilling hole at 180-degree position of 400.360-degree azimuth marking disc, 401. a base, 402. a half-side gland, a fastening screw rod, 404. an angle adjusting handle, 405. a dial scale, 406. an over-drilling rod hole, 407. a fixing hole, 408. an angle adjusting cavity, and.

Detailed Description

First embodiment

Referring to fig. 1-3, a water jet drilling machine comprises a drilling machine body 1 mechanically connected with a drilling machine inner drill rod holder 2 and a drilling machine outer drill rod holder 3, and is characterized in that: the side of a drill rod holder 3 outside the drilling machine is provided with a 360-degree azimuth identification disc 5, the outer side of the end of each section of outer drill rod 4 is provided with a water jet nozzle direction identification 6, the front end of the outer drill rod 4 is fixed with a flexible drill rod gyrator 7, an inner drill rod 10 connected with an outer high-pressure rubber pipe 8 through a water braid 9 is connected with a flexible high-pressure rubber pipe 11, and the front end of the flexible high-pressure rubber pipe 11 is connected with a water jet nozzle 12 through the section 7 of the flexible drill rod.

Wherein: several collars 71 are provided in the kelly gyrator 7.

Wherein: the 360-degree azimuth marking disc 5 is fixed on the outer drill rod clamp holder 3 of the drilling machine through a fixing hole 407, the 360-degree azimuth marking disc 5 is composed of a dial 405 which is arranged on a base 401 and is provided with an angle adjusting handle 404, a half-side gland 402 is arranged at the upper part of the dial 405 to form an angle adjusting cavity 408, a drill rod passing hole 406 is arranged in the middle of the 360-degree azimuth marking disc 5, a fastening screw 403 is arranged from the outer side of the base 401, and the dial 405 of the 360-degree azimuth marking disc 5 is marked with 0-360-degree scales and is provided with a water drop level meter 409.

Wherein the 360-degree azimuth marking disc 5 can also be fixed on the drilling machine main body 1.

Second embodiment

Referring to fig. 1-4, a coal seam feathered gas extraction drilling construction method of a water jet drilling machine comprises drilling a main drilling hole 200 (the diameter is more than 150 mm) in a coal seam 100, and withdrawing a drilling rod, and is characterized in that: a water jet drilling machine is utilized, an outer drill rod 4 with a flexible drill rod gyrator 7 is inserted into the bottom of a main drilling hole 200 of a coal seam 100, the outer drill rod 4 is fixed on a drilling machine main body 1 by a drilling machine outer drill rod clamp 3, an inner drill rod 10 is fixed on the drilling machine main body 1 by a drilling machine inner drill rod clamp 2, a water jet nozzle 12 is led into the flexible drill rod gyrator 7, a 360-degree azimuth marking disc 5 fixed on the drilling machine outer drill rod clamp 3 is used for pushing and pulling an angle adjusting handle 404 to enable a water drop level meter 409 to be in a horizontal state, after a dial is fixed by screwing a fastening screw 403, the outer drill rod 4 is rotated to enable the position of the water jet nozzle direction marking 6 to be aligned with the 0-degree position of the water jet dial 405, a water jet drilling machine is started, the inner drill rod 10 is driven to drill for a distance of L20 (generally L is 15-25 meters), and a 0-degree position water, withdrawing the inner drill rod 10, enabling the water jet nozzle 12 to be arranged in the flexible drill rod gyrator 7, pushing and pulling the angle adjusting handle 404 by using the 360-degree azimuth marking disc 5 fixed on the outer drill rod clamp 3 of the drilling machine, enabling the water drop level meter 409 to be in a horizontal state, screwing the fastening screw 403 to fix the dial, rotating the outer drill rod 4, enabling the position of the water jet nozzle direction mark 6 to be aligned with the 180-degree position of the dial 405, starting the water jet drilling machine, enabling the inner drill rod 10 to drill at a distance L of 20 (generally L of 15-25 meters), forming a 180-degree water jet plume-shaped drilling hole 400 at the position of 180-degree of the 360-degree azimuth marking disc 5, withdrawing the inner drill rod 10, enabling the water jet nozzle 12 to be arranged in the flexible drill rod gyrator 7, extracting the inner drill rod 10 and the outer drill rod 4 (generally H of 4-10 meters), enabling the water jet nozzle direction mark 6 to still be aligned with the 180-degree azimuth marking disc 5, starting a water jet drilling machine, enabling an inner drill rod 10 to drill a distance L of 20 (generally L of 15-25 m) meters to form a 180-degree position water jet feathered drilling hole 400 of a 360-degree azimuth marking disc 5, withdrawing the inner drill rod 10, enabling a water jet nozzle 12 to enter a flexible drill rod rotator 7, using the 360-degree azimuth marking disc 5 fixed on a drill rod holder 3 outside the drilling machine to push and pull an angle adjusting handle 404 to enable a water drop leveller 409 to be in a horizontal state, screwing a fastening screw 403 to fix a dial, rotating an outer drill rod 4 to enable a water jet nozzle direction marker 6 to be aligned to a 0-degree position of the dial 405, starting the water jet drilling machine, enabling the inner drill rod 10 to drill a distance L of 20 (generally L of 15-25 m) meters to form a 0-degree position water jet feathered drilling hole 300 of the 360-degree azimuth marking disc 5, withdrawing the inner drill rod 10, enabling the water jet nozzle 12 to enter the flexible drill rod rotator 7, the inner drill rod 10 and the outer drill rod 4 are pulled out by a distance of H4 (generally, H4-10 m), the water jet nozzle direction indicator 6 is still aligned with the 0 ° position of the 360 ° azimuth indicator disk 5, and a water jet drilling machine is started to drill the inner drill rod 10 by a distance of L20 (generally, L15-25 m) m, so that a water jet plume-shaped drill hole 300 with a 0 ° position of the 360 ° azimuth indicator disk 5 is formed.

Wherein: and repeating the construction process to form all water jet plume-shaped drill holes.

Wherein: l is more than or equal to 25 meters and more than or equal to 15 meters, H is integral multiple of the effective length of each section of outer drill rod 4, and H is more than or equal to 10 meters and more than or equal to 4 meters.

Wherein: the 0-degree angle of the water jet feathered drilling hole 300 at the 0-degree position of the 360-degree azimuth marking disc 5 can be selected and determined within the range of 0-360 degrees, the 180-degree angle of the water jet feathered drilling hole 400 at the 180-degree position of the 360-degree azimuth marking disc 5 can be selected and determined within the range of 0-360 degrees, and the number of the water jet feathered drilling holes can be determined according to requirements.