CN113445915B

CN113445915B - Hydraulic deflecting directional drilling device and method

Info

Publication number: CN113445915B
Application number: CN202110780143.9A
Authority: CN
Inventors: 徐成; 仇海生; 曹垚林; 赵洪瑞; 王贝; 闫斌移; 杜斌; 王宇鹍; 郭怀广; 倪兴; 廖巍
Original assignee: Shenyang Research Institute Co Ltd of CCTEG
Current assignee: Shenyang Research Institute Co Ltd of CCTEG
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2024-04-26
Anticipated expiration: 2041-07-09
Also published as: CN113445915A

Abstract

The invention discloses a hydraulic deflecting directional drilling device, which comprises a hydraulic deflecting directional drilling tool, an elastic drill rod, a pushing component and a high-pressure water injection pump, wherein the hydraulic deflecting directional drilling tool is arranged on the hydraulic deflecting directional drilling tool; the elastic drill rod is in threaded connection with the hydraulic deflecting directional drilling tool, and the hydraulic deflecting directional drilling tool comprises a water jet nozzle and a deflecting auxiliary component; the pushing component is connected with the elastic drill rod and is a rod type pushing component or a hydraulic type pushing component; the pushing component is connected with the high-pressure water injection pump through a high-pressure rubber pipe, and the high-pressure water injection pump injects water to the hydraulic deflecting directional drilling tool. The invention also provides a drilling method of the hydraulic deflecting directional drilling device. The invention is mainly used for underground coal seam hydraulic deflecting directional drilling, and has the advantages of large turning radius, small propulsion resistance, simple process and low cost compared with the radial turning hydraulic jet drilling technology. Compared with the directional drilling technology of the horizontal well, the directional drilling technology has the advantages of small turning radius, simple process and low cost.

Description

Hydraulic deflecting directional drilling device and method

Technical Field

The invention relates to the technical field of coal mine gas disaster prevention and control, in particular to a hydraulic deflecting directional drilling device and method.

Background

The invention belongs to the technical field of coal mine gas disaster prevention and control, and particularly relates to a radial turning device and method for drilling a small radius by using hydraulic jet in a coal seam.

The coal bed gas is one of important unconventional natural gas resources, and when coal bed gas extraction of a high-gas coal bed is carried out underground coal mines, whether the coal bed gas extraction of the non-pressure-relieved coal bed can achieve a good effect depends on the permeability of the coal bed. However, most of coal beds in mining areas in China belong to high-gas low-permeability coal beds, the coal quality is soft and the permeability is poor, the permeability is only 10 ^-4～10^-3 mD, the permeability of the coal beds directly determines the efficiency of coal mine gas extraction and utilization, and the problem of difficult extraction of coal bed gas of the low-permeability coal beds is a key link for ensuring the safe production of coal mines and improving the yield and the utilization rate of the coal bed gas. The research and development of technology and equipment for improving the permeability of a low-permeability coal bed and increasing the yield of coal bed gas become a difficult and urgent task, so that the research and development of underground permeability-increasing key technology and equipment of a difficult-to-draw coal bed becomes an important task to be developed urgently.

At present, the coal seam anti-reflection adopts a dense drilling mode, adopts the drilling anti-reflection mode alone, and particularly for the through-layer drilling, the problem of small coal body exposure area exists, and the single-hole coal body exposure area can be obviously increased by adopting a mode of forming multi-branch radial holes along the radial direction of the drilling by adopting an anti-reflection technology. In addition, due to the limitation of the turning radius, the selected sizes of the water jet nozzle and the elastic drill rod are often smaller, and the hydraulic drilling and the elastic drill rod have poorer pushing performance; the directional drilling technology is adopted, so that the problems of large turning radius, high construction cost and the like exist, and the directional drilling technology is not suitable for single-hole multi-branch small-area drilling and anti-reflection.

Disclosure of Invention

The invention aims to provide a hydraulic deflecting directional drilling device and a hydraulic deflecting directional drilling method. The invention is mainly used for underground coal seam hydraulic deflecting directional drilling, and has the advantages of large turning radius, small propulsion resistance, simple process and low cost compared with the radial turning hydraulic jet drilling technology. Compared with the directional drilling technology of the horizontal well, the directional drilling technology has the advantages of small turning radius, simple process and low cost.

In order to achieve the above purpose, the present invention provides the following technical solutions:

a hydraulic deflecting directional drilling device comprises a hydraulic deflecting directional drilling tool, an elastic drill rod, a pushing component and a high-pressure water injection pump; the elastic drill rod is in threaded connection with the hydraulic deflecting directional drilling tool, and the hydraulic deflecting directional drilling tool comprises a water jet nozzle and a deflecting auxiliary component;

The pushing component is connected with the elastic drill rod and is a rod type pushing component or a hydraulic type pushing component; the pushing component is connected with the high-pressure water injection pump through a high-pressure rubber pipe, and the high-pressure water injection pump injects water to the hydraulic deflecting directional drilling tool.

Further, the water jet nozzle comprises a first water jet nozzle body, and the bottom of the first water jet nozzle body is inclined to the head;

The deflecting auxiliary assembly comprises a directional guide body, wherein a directional connecting section, a first water guide section and a first elastic drill rod connecting section are sequentially arranged in the directional guide body from top to bottom; the directional guide body is in threaded connection with the first water jet nozzle body through the directional connecting section, is in threaded connection with the elastic drill rod through the first elastic drill rod connecting section, and is communicated with the elastic drill rod through the directional guide body;

The central line of the directional connecting section and the central line of the first elastic drill rod connecting section have an offset angle delta, and the central line of the first water jet nozzle body coincides with the central line of the directional connecting section;

The pushing component is a rod type pushing component and comprises a sealing pushing rod and a drilling machine, the sealing pushing rod is in threaded connection with a plurality of connected elastic drill rods, the high-pressure sealing pushing rod is controlled through the clamping of the drilling machine, and the high-pressure sealing pushing rod is connected with a high-pressure water injection pump through a high-pressure rubber pipe.

Further, the water jet nozzle comprises a second water jet nozzle body, the bottom to the head of the second water jet nozzle body are of a vertical structure, a first guide jet hole and a second guide jet hole are arranged at opposite positions of the left side and the right side of the middle section of the second water jet nozzle body, and the caliber of the second guide jet hole is larger than that of the first guide jet hole;

The deflecting auxiliary assembly comprises a first water guide flexible pipe, and a first spray head connecting section, a second water guide section and a second elastic drill rod connecting section are sequentially arranged in the first water guide flexible pipe from top to bottom; the first water guide flexible pipe is connected with the second water jet nozzle body through a first nozzle connecting section in a threaded manner, and is connected with the elastic drill rod through a second elastic drill rod connecting section in a threaded manner, and the water jet nozzle body is communicated with the elastic drill rod through the first water guide flexible pipe; the caliber of the second guide jet hole is larger than that of the first guide jet hole, and when water jet drilling is performed, the second water jet nozzle body generates lateral force F to act on the first water guide flexible pipe, so that the drilling tool is oriented;

Further, the water jet nozzle comprises a third water jet nozzle body, and the bottom to the head of the third water jet nozzle body are of a vertical structure;

The auxiliary deflecting component comprises a second water guide flexible pipe, a second spray head connecting section, a third elastic drill rod connecting section, a movable joint, a sealing piston rod, a first piston and a piston rod water guide pipe; the upper end and the lower end of the second water guide flexible pipe are respectively provided with a second spray head connecting section and a third elastic drill rod connecting section; the third water jet nozzle body is connected with the second water guide flexible pipe through the second nozzle connecting section in a threaded manner, the elastic drill rod is connected with the second water guide flexible pipe through the third elastic drill rod connecting section in a threaded manner, the third water jet nozzle body is communicated with the elastic drill rod through the second water guide flexible pipe, the second nozzle connecting section and the third elastic drill rod connecting section, a piston rod water guide pipe communicated with the second water guide flexible pipe is arranged on one side of the middle section of the second water guide flexible pipe, a sealing piston rod is arranged in the upper end of the piston rod water guide pipe, a first piston is arranged at the bottom end of the sealing piston rod, and the sealing piston rod moves up and down along the inner part of the piston rod water guide pipe;

The outer part of the second water guide flexible pipe is provided with a movable joint, the movable joint is pressed to the outer wall of the second water guide flexible pipe to be fixed, the movable joint comprises a lower fixed section, an elastic hose and an upper movable joint pipe, a sealing piston rod is communicated with the elastic drill rod through a piston rod water guide pipe and a third elastic drill rod connecting section, the upper end of the sealing piston rod stretches out of the upper part of the lower fixed section, under the action of water pressure, the sealing piston rod stretches out and then acts on the upper movable joint pipe, so that the upper movable joint pipe drives the second water guide flexible pipe to bend, and the third water jet nozzle body generates a drilling deflection angle;

Further, the top end of the sealing piston rod is hinged with the bottom end of the upper movable joint pipe, a compression spring is arranged between the lower end face of the outlet end of the piston rod water guide pipe and the upper end face of the first piston, and the compression spring is sleeved on the sealing piston rod; under the action of water pressure, after the sealing piston rod is extended, the sealing piston rod acts on the upper movable joint pipe to enable the third water jet nozzle body to generate a drilling deflection angle, and the extension state of the sealing piston rod can be adjusted by adjusting the extension amount of the water pressure control compression spring, so that the deflection angle of the hydraulic deflection directional drilling tool is controlled.

Further, a wireless measurement while drilling system is arranged at the tail end of the upper movable joint pipe in a threaded fixing mode, so that the positioning and the direction judgment of the third water jet nozzle body are realized.

Further, the wireless measurement while drilling system is a wireless inclinometer device.

Further, the water jet nozzle comprises a fourth water jet nozzle body, and the bottom to the head of the fourth water jet nozzle body are of a vertical structure;

the deflecting auxiliary assembly comprises a water guide elastic pipe, a third nozzle connecting section, a fourth elastic drill rod connecting section, an upper movable blade, a lower movable blade and a blade hinge shaft; the upper end and the lower end of the water guide elastic pipe are respectively provided with a third spray head connecting section and a fourth elastic drill rod connecting section;

the fourth water jet nozzle body is connected with the water guide elastic pipe through a third nozzle connecting section in a threaded manner, the elastic drill rod is connected with the water guide elastic pipe through a fourth elastic drill rod connecting section in a threaded manner, and the fourth water jet nozzle body is communicated with the elastic drill rod through the third nozzle connecting section, the water guide elastic pipe and the fourth elastic drill rod connecting section; the upper movable blade is hinged with the lower movable blade through a blade hinge shaft, the water guide elastic tube is positioned in the middle of the upper movable blade and the lower movable blade, and the upper movable blade and the lower movable blade are respectively pressed to the outer wall of the water guide elastic tube; after the fourth water jet nozzle body is propped against the coal rock wall, the upper movable blade rotates around the blade hinge shaft under the thrust action of the elastic drill rod, so that the fourth water jet nozzle body generates a drilling deflection angle;

Further, the water jet nozzle comprises a fifth water jet nozzle body, and the bottom to the head of the fifth water jet nozzle body are of a vertical structure; the fifth water jet nozzle body is connected with the elastic drill rod through threads;

The deflecting auxiliary assembly comprises a steel wire fixing ring, a steel wire and a steel wire traction winch; the steel wire is fixedly connected with the front end of the elastic drill rod in a buckling way through a steel wire fixing ring, the tail end of the steel wire is wound on a steel wire traction winch, the steel wire traction winch is fixed outside a drill hole, and the elastic drill rod is controlled to flex through the traction steel wire, so that a drilling deflection angle is generated by the water jet nozzle;

Further, the water jet nozzle comprises a sixth water jet nozzle body, and the bottom to the head of the sixth water jet nozzle body are of a vertical structure;

The auxiliary deflecting component comprises an auxiliary oblique body, an emergent window, a guide inclined plane and a whole pushing rod, and the sixth water jet nozzle body is in threaded connection with the elastic drill rod; the auxiliary oblique body is in a whole body tube shape, an emergent window for the sixth water jet nozzle body to extend out is formed in the side wall of the auxiliary oblique body, a guide inclined plane is arranged on the inner wall of the auxiliary oblique body, one end of the guide inclined plane is fixedly welded with the upper edge of the auxiliary oblique body, the other end of the guide inclined plane is fixedly welded with the inner wall of the auxiliary oblique body, an axial included angle of the auxiliary oblique body and the auxiliary oblique body is gamma, the bottom end of the auxiliary oblique body is in threaded connection with a plurality of whole body pushing rods, the whole body pushing rods are in a whole body tube shape, auxiliary deflecting assemblies are arranged in a drill hole, a guide inclined plane is provided for the sixth water jet nozzle body and elastic drill rods, and after the sixth water jet nozzle body is pushed to the guide inclined plane, bending is generated and the sixth water jet nozzle body is driven by the elastic drill rods to exit the emergent window along the guide inclined plane;

The pushing component is a rod type pushing component and comprises a sealing pushing rod and a drilling machine, wherein the sealing pushing rod is connected with a plurality of connected elastic drill rods in a threaded mode, the high-pressure sealing pushing rod is controlled through the clamping of the drilling machine, and the high-pressure sealing pushing rod is connected with a high-pressure water injection pump through a high-pressure rubber pipe.

Further, the water jet nozzle comprises a seventh water jet nozzle body, and the bottom to the head of the seventh water jet nozzle body are of a vertical structure;

The auxiliary deflecting component comprises an auxiliary oblique body, an emergent window, a guide inclined plane and a whole pushing rod, and the seventh water jet nozzle body is in threaded connection with the elastic drill rod; the auxiliary oblique body is in a whole body tube shape, an emergent window for the extension of the seventh water jet nozzle body is formed in the side wall of the auxiliary oblique body, a guide inclined plane is arranged on the inner wall of the auxiliary oblique body, one end of the guide inclined plane is welded and fixed with the upper edge of the auxiliary oblique body, the other end of the guide inclined plane is welded and fixed with the inner wall of the auxiliary oblique body, an axial included angle of the auxiliary oblique body and the auxiliary oblique body is gamma, the bottom end of the auxiliary oblique body is in threaded connection with a plurality of whole body pushing rods, and the whole body pushing rods are in a whole body tube shape;

The pushing component is a hydraulic pushing component and comprises a second piston, a piston rod water guide hole, a steel wire rope, a sealing bearing, a sealing rubber ring, a liquid injection joint, a steel wire rope winch, a limiting inclined plane and a bearing; the second piston is arranged on the piston rod, one end of the piston rod is in threaded connection with the elastic drill rod, the other end of the piston rod is in relative rotation connection with the steel wire rope through a bearing, a piston rod water guide hole is formed in the outer wall of the piston rod, the second piston can slide along the whole pushing rod and the inner wall of the auxiliary oblique body in a sealing manner, a limiting inclined plane is welded and fixed on the inner wall of the port of the auxiliary oblique body for limiting the second piston, and the second piston plays a role in blocking coal gangue; one end of the liquid injection joint is in threaded connection with the whole pushing rod, and the other end of the liquid injection joint is in threaded connection with the sealing bearing; the sealing bearing is internally provided with a sealing rubber ring, and the steel wire rope penetrates through an inner hole of the sealing rubber ring and slides along the sealing bearing in a sealing way and is fixed and pulled by a steel wire rope winch.

Further, the steel wire rope comprises a steel wire rope body and a sealing colloid coated outside the steel wire rope body.

By utilizing the hydraulic deflecting directional drilling device, the hydraulic deflecting directional drilling method is provided, and specifically comprises the following steps:

step 1: after the construction of the drill hole is completed in the coal seam, the water jet nozzle of the hydraulic deflecting directional drilling tool is conveyed to a designed deflecting drilling position in the drill hole by utilizing the pushing component and the elastic drill rod;

step 2: connecting the rod type pushing component or the hydraulic type pushing component with a high-pressure water injection pump through a high-pressure rubber pipe, starting the high-pressure water injection pump, and enabling high-pressure water to flow through an elastic drill rod to a water jet nozzle of a hydraulic deflecting directional drilling tool to conduct hydraulic deflecting directional coal breaking so as to generate directional hydraulic jet holes with the center line different from the center line of a drilled hole;

Step 3: continuously pushing by using the pushing component, and enabling the elastic drill rod to flex under force to drive the hydraulic deflecting directional drilling tool to drill along the directional hydraulic jet hole gradually and directionally so as to form a hydraulic deflecting directional drilling hole;

Step 4: the elastic drill rod and the hydraulic deflecting directional drilling tool are retracted to the drilling hole by utilizing the pushing component;

step 5: and (3) driving the elastic drill rod and the hydraulic deflecting directional drilling tool to rotate or move to a direction of additionally designed directional jet drilling by utilizing the pushing assembly, and repeating the steps (3-4) to finish multi-cluster hydraulic deflecting directional jet drilling.

Compared with the prior art, the invention has the following beneficial effects: the hydraulic deflecting directional drilling tool is adopted to replace the traditional small-radius rotary control device, and is pushed by an elastic drill rod to gradually and rotationally drill along a coal body to form a hydraulic deflecting directional drilling hole; the sizes of the water jet nozzle and the elastic drill rod are not limited by the sizes of the small-radius rotary control device, a larger rotary radius is provided for the rotation of the hydraulic deflecting directional drilling tool and the elastic drill rod, and compared with the radial rotary hydraulic jet drilling technology adopting the small-radius rotary control device, the hydraulic jet drilling device has the advantages of large rotary radius, small propulsion resistance, large size and high performance of the water jet nozzle and the elastic drill rod, simple pushing and drilling process, low cost and the like. Compared with the directional drilling technology adopting the combination of the screw drilling tool and the conventional hard drill rod, the directional drilling device has the advantages of small radius along the coal body, simple process, low cost and the like, and is suitable for multi-branch directional rotary drilling in small areas.

Drawings

FIG. 1 is a schematic diagram of a hydraulic deflecting directional drilling apparatus according to the present invention; is also a schematic structural diagram of the first embodiment of the invention

FIG. 2 is a schematic diagram illustrating an installation structure of a water jet nozzle and a deflecting auxiliary assembly according to a first embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating a water jet nozzle and a whipstock auxiliary assembly according to a second embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating a water jet nozzle and a whipstock auxiliary assembly according to a third embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating a water jet nozzle and a whipstock auxiliary assembly according to a fourth embodiment of the present invention;

FIG. 6 is a schematic diagram of a water jet nozzle and a whipstock auxiliary assembly according to a fifth embodiment of the invention;

FIG. 7 is a schematic diagram illustrating a water jet nozzle and a whipstock auxiliary assembly according to a sixth embodiment of the invention;

FIG. 8 is a schematic diagram of a drilling method of a deflecting directional drilling device according to the first to sixth embodiments;

FIG. 9 is a schematic diagram of a water jet nozzle and a whipstock auxiliary assembly according to a seventh embodiment of the invention;

FIG. 10 is a schematic diagram of a whipstock directional drilling apparatus and a drilling method thereof according to a seventh embodiment of the present invention;

FIG. 11 is a schematic diagram of a whipstock directional drilling apparatus and a drilling method thereof according to an eighth embodiment of the present invention;

FIG. 12 is a schematic diagram of a water jet nozzle and an elastic drill stem according to an eighth embodiment of the present invention;

FIG. 13 is a cross-sectional view taken along line a-a of FIG. 12;

FIG. 14 is a schematic view of a whipstock auxiliary assembly according to an eighth embodiment of the invention;

FIG. 15 is a schematic view of a whipstock directional drilling apparatus and a drilling method thereof according to a ninth embodiment of the present invention;

FIG. 16 is a schematic diagram of hydraulic fracturing of a hydraulic deflecting directional drilling coal seam section;

In the figure: 1. hydraulic deflecting directional drilling tool; 2. an elastic drill rod;

3. A pushing assembly; 31. sealing the pushing rod; 32. a drilling machine;

301. A second piston; 302. a piston rod; 303. a piston rod water guide flower hole; 304. a wire rope; 3041. a wire rope body; 3042. sealing colloid; 305. sealing the shaft; 306. a sealing rubber ring is supported; 307. a liquid injection joint; 308. a wire rope winch; 309. limiting inclined planes; 310. a bearing;

5. A high-pressure water injection pump 6, a drilling hole 7, a hydraulic deflecting directional drilling hole 8 and a hydraulic straight drilling hole;

11. A water jet nozzle; 1101. a first water jet nozzle body; 1102. a second water jet body; 11021. a first guide injection hole; 11022. a second guide injection hole; 1103. a third water jet body; 1104. a fourth water jet nozzle body; 1105. a fifth water jet head body; 1106. a sixth water jet nozzle body; 1107. seven water jet nozzle bodies;

12. a whipstock auxiliary assembly; 1201. a directional guide body; 12011. a directional connection section; 12012. a first water guide section; 12013. a first resilient drill pipe connecting section;

1202. a first water-guiding flexible tube; 12021. a first nozzle connecting section; 12022. a second water guide section; 12023. a second resilient drill pipe connecting section;

1203. A second water-guiding flexible tube; 1204. a second nozzle connecting section; 1205. a third resilient drill pipe connecting section; 1206. a movable joint; 12061. a lower fixed section; 12062. an elastic hose; 12063. an upper movable joint tube; 1207. sealing the piston rod; 1208. a first piston; 1209. a piston rod water guide pipe; 12110. a compression spring; 60. a wireless measurement while drilling system;

12111. a water-guiding elastic tube; 12112. a third nozzle connecting section; 12113. a fourth resilient drill rod coupling segment; 12114. an upper movable sheet; 12115. a lower movable sheet; 12116. a hinge shaft for the leaf;

12117. a steel wire fixing ring; 12118. a steel wire; 12119. a steel wire traction winch;

12120. Auxiliary oblique body making; 12121. an exit window; 12122. a guide slope; 12123. a whole body pushing rod.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

Referring to fig. 1-2, a hydraulic deflecting directional drilling device comprises a hydraulic deflecting directional drilling tool 1, an elastic drill rod 2, a pushing component 3 and a high-pressure water injection pump 5; the elastic drill rod 2 is in threaded connection with the hydraulic deflecting directional drilling tool 1, and the hydraulic deflecting directional drilling tool 1 comprises a water jet nozzle 11 and a deflecting auxiliary component 12;

the pushing component 3 is connected with the elastic drill rod 2, and the pushing component 3 is a rod type pushing component or a hydraulic type pushing component; the pushing component 3 is connected with the high-pressure water injection pump 5 through a high-pressure rubber pipe, and the high-pressure water injection pump 5 injects water into the hydraulic deflecting directional drilling tool 1.

The water jet nozzle 11 comprises a first water jet nozzle body 1101, and the bottom to the head of the first water jet nozzle body 1101 is in an inclined structure;

the auxiliary assembly 12 comprises a directional guide body 1201, wherein a directional connecting section 12011, a first water guiding section 12012 and a first elastic drill rod connecting section 12013 are sequentially arranged in the directional guide body 1201 from top to bottom; the directional guide body 1201 is in threaded connection with the first water jet nozzle body 1101 through the directional connection section 12011, and is in threaded connection with the elastic drill rod 2 through the first elastic drill rod connection section 12013, and the first water jet nozzle body 1101 is communicated with the elastic drill rod 2 through the directional guide body 1201;

The central line of the directional connecting section 12011 and the central line of the first elastic drill rod connecting section 12013 have an offset angle delta, the offset angle delta is smaller than 30 degrees, the arrangement of the offset angle delta can enable the water jet nozzle 11 to generate jet drilling offset angles inconsistent with the axial direction of a drilling hole, and the central line of the first water jet nozzle body 1101 is coincident with the central line of the directional connecting section 12011;

The pushing component 3 is a rod type pushing component and comprises a sealing pushing rod 31 and a drilling machine 32, the sealing pushing rod 31 is in threaded connection with a plurality of connected elastic drilling rods 2, the high-pressure sealing pushing rod 31 is clamped and controlled by the drilling machine 32, and the high-pressure sealing pushing rod 31 is connected with the high-pressure water injection pump 5 through a high-pressure rubber pipe.

Example two

The difference from the first embodiment is that:

Referring to fig. 3, the water jet nozzle 11 includes a second water jet nozzle body 1102, a bottom-to-head vertical structure of the second water jet nozzle body 1102, a first guide injection hole 11021 and a second guide injection hole 11022 are disposed at opposite positions on left and right sides of a middle section of the second water jet nozzle body 1102, and a caliber of the second guide injection hole 11022 is larger than that of the first guide injection hole 11021;

The auxiliary assembly 12 comprises a first water guiding flexible pipe 1202, and a first nozzle connecting section 12021, a second water guiding section 12022 and a second elastic drill pipe connecting section 12023 are sequentially arranged in the first water guiding flexible pipe 1202 from top to bottom; the first water-guiding flexible pipe 1202 is in threaded connection with the second water-jetting head body 1102 through a first nozzle connecting section 12021, is in threaded connection with the elastic drill rod 2 through a second elastic drill rod connecting section 12023, and the water-jetting head body 21 is communicated with the elastic drill rod 2 through the first water-guiding flexible pipe 1202; the caliber of the second guide jet hole 11022 is larger than that of the first guide jet hole 11021, and when water jet drilling is performed, the second water jet nozzle body 1102 generates lateral force F to act on the first water guide flexible pipe 1202, so that drilling tool orientation is realized;

Example III

The difference from the first embodiment is that:

referring to fig. 4, the water jet head 11 includes a third water jet head body 1103, and a bottom to head of the third water jet head body 1103 is in a vertical structure;

The auxiliary assembly 12 includes a second water guiding flexible pipe 1203, a second nozzle connecting section 1204, a third elastic drill pipe connecting section 1205, a movable joint 1206, a sealing piston rod 1207, a first piston 1208, and a piston rod water guiding pipe 1209; the upper end and the lower end of the second water guide flexible pipe 1203 are respectively provided with a second nozzle connecting section 1204 and a third elastic drill rod connecting section 1205; the third water jet nozzle body 1103 is in threaded connection with the second water guiding flexible pipe 1203 through the second nozzle connecting section 1204, the elastic drill rod 2 is in threaded connection with the second water guiding flexible pipe 1203 through the third elastic drill rod connecting section 1205, the third water jet nozzle body 1103 is in communication with the elastic drill rod 2 through the second water guiding flexible pipe 1203, the second nozzle connecting section 1204 and the third elastic drill rod connecting section 1205, a piston rod water guiding pipe 1209 communicated with the second water guiding flexible pipe 1203 is arranged at one side of the middle section of the second water guiding flexible pipe 1203, a sealing piston rod 1207 is arranged at the inner part of the upper end of the piston rod water guiding pipe 1209, a first piston 1208 is arranged at the bottom end of the sealing piston rod 1207, and the sealing piston rod 1207 moves up and down along the inner part of the piston rod water guiding pipe 1209;

A movable joint 1206 is arranged outside the second water guiding flexible pipe 1203, the movable joint 1206 is pressed to the outer wall of the second water guiding flexible pipe 1203 to be fixed, the movable joint 1206 comprises a lower fixed section 12061, an elastic hose 12062 and an upper movable joint pipe 12063, a sealing piston rod 1207 is communicated with the elastic drill rod 2 through a piston rod water guiding pipe 1209 and a third elastic drill rod connecting section 1205, the upper end of the sealing piston rod 1207 extends out of the upper fixed section 12061 under the action of water pressure, after the sealing piston rod 1207 extends out, the sealing piston rod 1207 acts on the upper movable joint pipe 12063, so that the upper movable joint pipe 12063 drives the second water guiding flexible pipe 1203 to bend, and a drilling deflection angle is generated by the third water jet nozzle body 1103;

Example IV

The difference from the third embodiment is that:

Referring to fig. 5, the top end of the sealing piston rod 1207 is hinged to the bottom end of the upper movable joint tube 12063, a compression spring 12110 is disposed between the lower end surface of the outlet end of the piston rod water guide tube 1209 and the upper end surface of the first piston 1208, and the compression spring 12110 is sleeved on the sealing piston rod 1207; under the action of water pressure, after the sealing piston rod 1207 stretches, the sealing piston rod 1207 acts on the upper movable joint pipe 12063, so that the third water jet nozzle body 1103 generates a drilling deflection angle, and the stretching state of the sealing piston rod 1207 can be adjusted by adjusting the stretching amount of the water pressure control compression spring 12110, so that the deflection angle of the hydraulic deflection directional drilling tool 1 is controlled.

Example five

The difference from the fourth embodiment is that:

referring to fig. 6, a wireless measurement while drilling system 60 is installed at the end of the upper movable joint pipe 12063 in a threaded fixing manner, so as to realize positioning and direction judgment of the third water jet nozzle body 1103.

The wireless measurement while drilling system 60 is adopted as patent number 201210587198.9, which is applied for the twenty-second institute of electronic technology group company in China.

The wireless measurement while drilling system 60 may also be replaced with a wireless inclinometer apparatus.

Example six

Referring to fig. 7, the difference from the first embodiment is that:

The water jet nozzle 11 comprises a fourth water jet nozzle body 1104, and the bottom to the head of the fourth water jet nozzle body 1104 is in a vertical structure;

The auxiliary assembly 12 comprises a water guiding elastic tube 12111, a third nozzle connecting section 12112, a fourth elastic drill pipe connecting section 12113, an upper movable blade 12114, a lower movable blade 12115 and a blade hinge shaft 12116; the upper end and the lower end of the water guide elastic tube 12111 are respectively provided with a third nozzle connecting section 12112 and a fourth elastic drill rod connecting section 12113;

The fourth water jet nozzle body 1104 is in threaded connection with the water guiding elastic tube 12111 through the third nozzle connecting section 12112, the elastic drill rod 2 is in threaded connection with the water guiding elastic tube 12111 through the fourth elastic drill rod connecting section 12113, and the fourth water jet nozzle body 1104 is in conductive connection with the elastic drill rod 2 through the third nozzle connecting section 12112, the water guiding elastic tube 12111 and the fourth elastic drill rod connecting section 12113; the upper movable blade 12114 is hinged with the lower movable blade 12115 through a blade hinge shaft 12116, the water guide elastic tube 12111 is positioned in the middle of the upper movable blade 12114 and the lower movable blade 12115, and the upper movable blade 12114 and the lower movable blade 12115 are respectively pressed to the outer wall of the water guide elastic tube 12111; after the fourth water jet nozzle body 1104 is propped against the coal rock wall, the upper movable blade 12114 rotates around the blade hinge shaft 12116 under the thrust action of the elastic drill rod 2, so that the fourth water jet nozzle body 1104 generates a drilling deflection angle;

the pushing component 3 is a rod type pushing component and comprises a sealing pushing rod 31 and a drilling machine 32, the sealing pushing rod 31 is in threaded connection with a plurality of connected elastic drilling rods 2, the high-pressure sealing pushing rod 31 is clamped and controlled by the drilling machine 32, and the high-pressure sealing pushing rod 31 is connected with the high-pressure water injection pump 5 through a high-pressure rubber pipe. Example seven

The difference from the first embodiment is that:

Referring to fig. 9-10, the water jet head 11 includes a fifth water jet head body 1105, and the bottom to the head of the fifth water jet head body 1105 is in a vertical structure; the fifth water jet nozzle body 1105 is connected with the elastic drill rod 2 through threads;

The whipstock auxiliary assembly 12 includes a wire retaining ring 12117, a wire 12118, and a wire traction winch 12119; the steel wire 12118 is fixedly connected with the front end of the elastic drill rod 2 through a steel wire fixing ring 12117 in a buckling manner, the tail end of the steel wire 12118 is wound on a steel wire traction winch 12119, the steel wire traction winch 12119 is fixed outside a drilled hole, and the elastic drill rod 2 is controlled to flex through the traction steel wire 12118, so that a drilling deflection angle is generated by the water jet nozzle 11;

Example eight

The difference from the first embodiment is that:

Referring to fig. 11-14, the water jet head 11 includes a sixth water jet head body 1106, and a bottom-to-head vertical structure of the sixth water jet head body 1106;

the auxiliary assembly 12 includes an auxiliary oblique body 12120, an exit window 12121, a guiding inclined surface 12122, and a whole pushing rod 12123, and the sixth water jet body 1106 is screwed with the elastic drill rod 2; the auxiliary oblique body 12120 is in a whole body shape, an emergent window 12121 for extending out of the sixth water jet body 1106 is formed in the side wall of the auxiliary oblique body 12120, a guiding inclined plane 12122 is formed in the inner wall of the auxiliary oblique body 12120, one end of the guiding inclined plane 12122 is welded and fixed with the upper edge of the auxiliary oblique body 12120, the other end of the guiding inclined plane 12122 is welded and fixed with the inner wall of the auxiliary oblique body 12120, an axial included angle of the guiding inclined plane 12120 is gamma and less than 30 degrees, the bottom end of the auxiliary oblique body 12120 is in threaded connection with a plurality of whole body pushing rods 12123, the whole body pushing rods 12123 are in a whole body shape, the auxiliary oblique body assembly 12 is arranged in a drilled hole, a guiding inclined plane is provided for the sixth water jet body 1106 and the elastic drill rods 2, after the sixth water jet body 1106 is driven by the elastic drill rods 2 to be pushed to the guiding inclined plane 12122, bending is generated, and the emergent window 12121 is drilled along the guiding inclined plane 12122;

The pushing component 3 is a rod type pushing component and comprises a sealing pushing rod 31 and a drilling machine 32, the sealing pushing rod 31 is in threaded connection with a plurality of connected elastic drill rods 2, the high-pressure sealing pushing rod 31 is clamped and controlled through the drilling machine 32, and the high-pressure sealing pushing rod 31 is connected with the high-pressure water injection pump 5 through a high-pressure rubber pipe.

Example nine

The difference from the first embodiment is that:

Referring to fig. 15, the water jet head 11 includes a seventh water jet head body 1107, and a bottom to head of the seventh water jet head body 1107 is in a vertical structure;

The auxiliary deflecting component 12 comprises an auxiliary deflecting body 12120, an exit window 12121, a guiding inclined surface 12122 and a whole pushing rod 12123, and the seventh water jet body 1107 is in threaded connection with the elastic drill rod 2; the auxiliary oblique body 12120 is in a whole body shape, an exit window 12121 for the seventh water jet body 1107 to extend out is formed in the side wall of the auxiliary oblique body 12120, a guiding inclined surface 12122 is formed in the inner wall of the auxiliary oblique body 12120, one end of the guiding inclined surface 12122 is welded and fixed with the upper edge of the auxiliary oblique body 12120, the other end of the guiding inclined surface is welded and fixed with the inner wall of the auxiliary oblique body 12120, the axial included angle of the guiding inclined surface and the auxiliary oblique body 12120 is gamma, gamma is smaller than 30 degrees, the bottom end of the auxiliary oblique body 12120 is in threaded connection with a plurality of whole body pushing rods 12123, and the whole body pushing rod 12123 is in a whole body shape;

The pushing component 3 is a hydraulic pushing component and comprises a second piston 301, a piston rod 302, a piston rod water guide hole 303, a steel wire rope 304, a sealing bearing 305, a sealing rubber ring 306, a liquid injection joint 307, a steel wire rope winch 308, a limiting inclined plane 309 and a bearing 310; the second piston 301 is mounted on the piston rod 302, one end of the piston rod 302 is in threaded connection with the elastic drill rod 2, the other end of the piston rod 302 is in rotatable connection with the steel wire rope 304 through a bearing 310, a piston rod water guide hole 303 is formed in the outer wall of the piston rod 302, the second piston 301 can slide along the inner walls of the whole body pushing rod 12123 and the auxiliary whipstock 12120 in a sealing manner, and a limiting inclined plane 309 is welded and fixed on the inner wall of the port of the auxiliary whipstock 12120 for limiting the second piston 301 and playing a role in blocking coal gangue; one end of the liquid injection joint 307 is in threaded connection with the whole pushing rod 12123, and the other end of the liquid injection joint is in threaded connection with the sealing bearing 305; the sealing bearing 305 is internally provided with a sealing rubber ring 306, and the steel wire rope 304 passes through an inner hole of the sealing rubber ring 306 and slides along the sealing bearing 305 in a sealing way and is fixed and pulled by a steel wire rope winch 308.

The steel wire rope 304 includes a steel wire rope body 3041 and a sealing colloid 3042 coated outside the steel wire rope body 3041.

Examples ten

The hydraulic deflecting directional drilling device of the first to ninth embodiments is utilized to provide a hydraulic deflecting directional drilling method, which specifically comprises the following steps:

step 1: after the construction and drilling are completed in the coal seam, the water jet nozzle of the hydraulic deflecting directional drilling tool 1 is conveyed to a designed deflecting drilling position by utilizing the pushing component 3 and the elastic drilling rod 2;

Step 2: connecting a rod type pushing component or a hydraulic type pushing component with a high-pressure water injection pump 5 through a high-pressure rubber pipe, starting the high-pressure water injection pump 5, and enabling high-pressure water to flow through an elastic drill rod 2 to a water jet nozzle 11 of a hydraulic deflecting directional drilling tool 1 to conduct hydraulic deflecting directional coal breaking to generate directional hydraulic jet holes with the center line different from the center line of a drilled hole;

Step 3: the pushing component 3 is utilized to continue pushing, the elastic drill rod 2 is stressed to flex, and the hydraulic deflecting directional drilling tool 1 is driven to drill gradually and directionally along the directional hydraulic jet hole, so that a hydraulic deflecting directional drilling hole is formed;

Step 4: the elastic drill rod 2 and the hydraulic deflecting directional drilling tool 1 are retracted to the drilling hole 6 by the pushing component 3;

Step 5: and (3) driving the elastic drill rod 2 and the hydraulic deflecting directional drilling tool 1 to rotate or move to a direction of additionally designed directional jet drilling by utilizing the pushing component, and repeating the steps (3-4) to finish multi-cluster hydraulic deflecting directional jet drilling.

The elastic drill rod 2 of the invention adopts an elastic drill rod in patent number 202110576619.7, and the applicant: the Chinese coal department group Shenyang research institute Co., ltd. In addition, the elastic drill rod 2 of the present invention may be replaced by a continuous oil pipe, a flexible drill rod, a polyethylene pipe or a high-pressure rubber pipe. According to the difficulty of feeding the elastic drill rods into the drill holes, the elastic drill rods in all the embodiments of the invention are formed by connecting single or multiple elastic drill rods in a threaded mode end to end (the number is selected according to the needs).

The water jet nozzle 11 is a self-feeding and self-rotating jet nozzle, a spin jet nozzle or a porous jet nozzle, and the size of a hole generated by coal breaking by jet flow of the water jet nozzle 11 is larger than the maximum outer diameter of the water jet nozzle 11 and larger than the outer diameter of the elastic drill rod 2. All the water jet heads 11 in the present embodiment are provided with a plurality of front jet ejection openings and a plurality of rear jet ejection openings.

The hydraulic whipstock directional drilling method using the hydraulic whipstock directional drilling apparatus of each embodiment is described in detail below:

1. when the hydraulic deflecting directional drilling device of the first to third embodiments is utilized, the hydraulic deflecting directional drilling method specifically comprises the following steps:

step 11: after the construction of the drilling hole is completed in the coal seam, the water jet nozzle 11, the deflecting auxiliary assembly 12 and the elastic drill rod 2 of the hydraulic deflecting directional drilling tool are sequentially connected, and the hydraulic deflecting directional drilling tool 1 is conveyed to a design deflecting drilling position in the drilling hole 6 by utilizing the pushing assembly 3 (rod type pushing assembly) (when the hydraulic deflecting directional drilling tool 1 in the sixth embodiment is adopted, after being pushed to the bottom of the hole, the sealing pushing rod 31 is required to be pushed continuously, so that the hydraulic deflecting directional drilling tool 1 generates a directional deflection angle);

Step 21: connecting the sealing push rod 31 with the high-pressure water injection pump 5 through a high-pressure rubber pipe, starting the high-pressure water injection pump 5, and enabling high-pressure water to flow through the sealing push rod 31 and the elastic drill rod 2 to the hydraulic deflecting directional drilling tool 1 to perform hydraulic deflecting directional coal breaking so as to generate directional hydraulic jet holes with the center line different from the center line of the drilled hole;

Step 31: the sealing pushing rod 31 is pushed by the drilling machine 32, the elastic drill rod 2 deflects under the thrust of the sealing pushing rod 31 and the counterforce of the coal wall, and the hydraulic deflecting directional drilling tool 1 is driven to drill directionally along the directional hydraulic jet hole step by step to form a hydraulic deflecting directional drilling hole 7;

step 41: the sealing pushing rod 31 is retracted by the drilling machine 32, so that the elastic drill rod 2 and the hydraulic deflecting directional drilling tool 1 are retracted to the bottom of the drilling hole 6;

Step 52: the drilling machine 32 is utilized to drive the sealing pushing rod 31 and the elastic drill rod 2, so that the hydraulic deflecting directional drilling tool 1 is driven to rotate to a direction of additionally designed directional jet drilling, and the steps 31-41 are repeated to complete multi-cluster hydraulic deflecting directional jet drilling.

2. When the hydraulic deflecting directional drilling device in the fourth embodiment and the fifth embodiment is utilized, the hydraulic deflecting directional drilling method specifically comprises the following steps:

Step 12: after the construction of the drilling hole is completed in the coal seam, sequentially connecting the hydraulic deflecting directional drilling tool 1, the elastic drilling rod 2 and the sealing pushing rod 31, and conveying the hydraulic deflecting directional drilling tool 1 to the bottom of the drilling hole 6 by utilizing the drilling machine 32 through one or more sequentially connected sealing pushing rods 31;

Step 22: connecting the sealing push rod 31 with the high-pressure water injection pump 5 through a high-pressure rubber pipe, starting the high-pressure water injection pump 5, enabling high-pressure water to flow through the sealing push rod 31 and the elastic drill rod 2 to the hydraulic deflecting directional drilling tool 1 to perform hydraulic deflecting directional coal breaking, controlling the extending amount of the sealing piston rod 1207 through controlling water injection pressure, and enabling the hydraulic deflecting directional drilling tool 1 to generate deflecting deflection angles and directional hydraulic injection holes with the center line different from the center line of a drilled hole;

step 32: pushing the sealing pushing rod 31 by using the drilling machine 32, and bending the elastic drill rod 2 under the thrust of the sealing pushing rod 31 and the counterforce of the coal wall to gradually drill directionally along the directional hydraulic jet hole to form a hydraulic deflecting directional drilling hole 7;

step 42: calculating the position and angle of the water jet nozzle 11 through the pushing distance of the drill rod (when the hydraulic deflecting directional drilling tool 1 of the fifth embodiment is adopted, the position and angle of the water jet nozzle 11 can be obtained through the wireless measurement while drilling system 60), after the designed position is reached, the sealing piston rod 1207 retracts under the action of the compression spring 12110 by adjusting the water injection pressure, the movable joint 1206 is driven, the deflecting deflection angle of the hydraulic deflecting directional drilling tool 1 is further driven to be reduced, and the hydraulic deflecting directional drilling tool 1 continues to jet and drill along the current jet direction under the pushing of the sealing pushing rod 31 and the elastic drill rod 2, so that a hydraulic straight drilling hole is formed;

step 52: the sealing pushing rod 31 is retracted by the drilling machine 32, so that the elastic drill rod 2 and the hydraulic deflecting directional drilling tool 1 are retracted to the bottom of the drilling hole 6; the drilling machine 32 is utilized to drive the sealing pushing rod 31 and the elastic drill rod 2, so as to drive the hydraulic deflecting directional drilling tool 1 to rotate to a direction of additionally designed directional jet drilling, and the steps 32-42 are repeated, so that multi-cluster hydraulic jet drilling is completed.

3. Referring to fig. 10, a hydraulic deflecting directional drilling method by using the hydraulic deflecting directional drilling device of the seventh embodiment specifically includes:

Step 13: after the construction of the drill hole is completed in the coal seam, sequentially connecting the hydraulic deflecting directional drilling tool 1, the elastic drill rod 2 and the sealing pushing rod 31, and conveying the hydraulic deflecting directional drilling tool 1 to the bottom of the drill hole by utilizing the drilling machine 32 through one or more sequentially connected sealing pushing rods 31;

Step 23: the steel wire 12118 is pulled back by a small amount by utilizing the steel wire traction winch 12119, the elastic drill rod 2 generates a small amount of deflection under the torque action of the steel wire 12118 and the sealing push rod 31, the sealing push rod 31 is connected with the high-pressure water injection pump 5 through a high-pressure rubber pipe, the high-pressure water injection pump 5 is started, and high-pressure water flows through the sealing push rod 31 and the elastic drill rod 2 to the hydraulic deflecting directional drilling tool 1 to perform hydraulic deflecting directional coal breaking, so that directional hydraulic jet holes with the center line different from the center line of a drilled hole are generated;

Step 33: stopping the traction of the steel wire 12118 by the steel wire traction winch 12119, wherein the steel wire 12118 is in a loose state, pushing the sealing push rod 31 and the elastic drill rod 2 by using the drilling machine 32, driving the steel wire 12118 to be pulled out by the steel wire traction winch 12119, driving the hydraulic deflecting directional drilling tool 1 to drill along the directional hydraulic jet hole, after a certain drilling distance, pulling the steel wire 12118 back by a small amount by using the steel wire traction winch 12119 again, generating the directional hydraulic jet hole again through the torque effect, referring to the designed directional drilling track, calculating the drilling distance, repeating the directional drilling and drilling steps to form the hydraulic deflecting directional drilling hole 8;

step 43: the sealing pushing rod 31 is retracted by the drilling machine 32, and meanwhile, the steel wire 12118 is retracted by the steel wire traction winch 12119, so that the elastic drill rod 2 and the hydraulic deflecting directional drilling tool 1 are retracted to the bottom of the drilling hole 6;

Step 53: and driving the sealing push rod 31 and the elastic drill rod 2 by using the drilling machine 32, further driving the hydraulic deflecting directional drilling tool 1 to rotate to a direction of additionally designing directional jet drilling, and repeating the steps 33-43 to finish multi-cluster hydraulic deflecting directional jet drilling.

Step 61: and (3) driving the sealing push rod 31 and the elastic drill rod 2 by using the drilling machine 32, further driving the hydraulic deflecting directional drilling tool 1 to move to other designed directional jet drilling positions, and repeating the steps 13-53 to finish multi-section hydraulic deflecting directional jet drilling.

4. Referring to fig. 11, with the hydraulic deflecting directional drilling device of the eighth embodiment, a hydraulic deflecting directional drilling method is provided:

Step 14: after the drilling machine 32 is used for drilling the main hole 205 along the coal seam construction multi-section branch, the auxiliary whipstock 12120 is sent to the designed whipstock directional drilling position by the drilling machine 32 through a plurality of whole body pushing rods 12123 and then fixed;

Step 24: the sixth water jet nozzle body 1106, the plurality of elastic drill rods 2 and the sealing pushing rod 31 are sequentially connected, the hydraulic deflecting directional drilling tool is conveyed to the auxiliary deflecting body 12120 along the inside of the whole body pushing rod 12123 by utilizing the drilling machine 32 through one or more sealing pushing rods 31 which are sequentially connected, and auxiliary guiding deflecting is completed;

Step 34: starting the high-pressure water injection pump 5, and carrying out hydraulic deflecting and directional coal breaking on high-pressure water through the sealing push rod 31, the elastic drill rod 2 and the sixth water jet nozzle body 1106 to generate directional hydraulic jet holes with the center line different from the center line of the drill hole;

Step 44: pushing the sealing pushing rod 31 by using the drilling machine 32 to drive the elastic drill rod 2 and the sixth water jet nozzle body 1106 to continuously drill along the directional hydraulic jet hole so as to form a branch hole 206;

Step 54: the elastic drill rod 2 and the sixth water jet nozzle body 1106 are retracted to the auxiliary whipstock 12120 by the drill retracting seal pushing rod 31;

step 62: the drilling machine 32 is utilized to drive the auxiliary deflecting auxiliary assembly 12 to rotate to a direction of additionally designed directional jet drilling, and the steps 34-54 are repeated to complete multi-cluster hydraulic deflecting directional jet drilling.

Step 71: and driving the auxiliary deflecting auxiliary assembly to move to a position for additionally designing directional jet drilling by using the drilling machine, and repeating the steps 34-62 to finish the multi-section hydraulic deflecting directional jet drilling.

5. Referring to fig. 15, with the hydraulic deflecting directional drilling device of the ninth embodiment, a hydraulic deflecting directional drilling method is provided:

Step 15: after the drilling of the main hole 205 is completed by using the drilling machine to construct multiple branches along the coal seam, the auxiliary whipstock 12120 is sent to the designed whipstock directional drilling position by using the drilling machine 32 through a plurality of whole body pushing rods 12123 and then fixed;

Step 25: the water jet spray head 11 is connected, the plurality of elastic drill rods 2 are sent into the whole body pushing rod 12123, the piston rod 302 is connected with the tail end of the elastic drill rods 2, and then the whole body pushing rod 12123 is sent;

after connecting the liquid injection joint 307 with the whole pushing rod 12123, the steel wire rope 304 passes through the sealing rubber ring 306 and is fixedly connected with the other end of the piston rod 302, finally the sealing bearing 305 is connected with the liquid injection joint 307, and the liquid injection joint 307 is connected with a high-pressure water injection pump through a high-pressure rubber pipe, so that the installation is completed.

Step 35: starting the high-pressure water injection pump 5, enabling high-pressure water to flow through the liquid injection joint 307 and the whole pushing rod 12123, acting on the second piston 301 to generate pushing force, pushing the plurality of elastic drill rods 2 and the water jet nozzle 11 forwards, and simultaneously starting the wire rope winch 308 to control the second piston 301 through the special wire rope 304 so as to control the pushing speed of the elastic drill rods 2 and the water jet nozzle 11;

Step 45: the elastic drill rods 2 and the water jet nozzles 11 are pushed to the auxiliary deflecting body 12120 to finish auxiliary deflecting, and meanwhile, high-pressure water flows through the piston rod water guide flower holes 303, the piston rods 302 and the plurality of elastic drill rods 2 to the water jet nozzles 11 to realize directional jet coal breaking drilling of the jet flows of the water jet nozzles 11.

Step 55: after the designed drilling distance is reached, the high-pressure water injection pump 5 is stopped, the special steel wire rope 304 is pulled by the steel wire rope winch 308, and the elastic drill rod 2 and the water jet nozzle 11 are driven to retract to the auxiliary whipstock 12120.

Step 63: and (5) driving the auxiliary deflecting component 12 to rotate to another design direction by using the drilling machine, and repeating the steps 35-55 to finish multi-cluster hydraulic deflecting directional jet drilling.

Step 72: and driving the auxiliary whipstock to move to a position for additionally designing directional jet drilling by using the drilling machine, and repeating the steps 35-63 to finish multi-section hydraulic whipstock directional jet drilling.

Referring to fig. 16, after the hydraulic deflecting directional drilling is completed, single-cluster or multi-cluster hydraulic deflecting directional jet drilling holes are formed, hydraulic fracturing is performed on the hole sealing section by utilizing the hydraulic fracturing tool 102 string in the hydraulic deflecting directional drilling coal layer section 101, so that the hydraulic fracturing crack expansion is guided, and a crack system is increased.

The hydraulic deflecting directional drilling tool is adopted to replace the traditional small-radius rotary control device, and is pushed by an elastic drill rod to gradually and rotationally drill along a coal body to form a hydraulic deflecting directional drilling hole; the sizes of the water jet nozzle and the elastic drill rod are not limited by the sizes of the small-radius rotary control device, a larger rotary radius is provided for the rotation of the hydraulic deflecting directional drilling tool and the elastic drill rod, and compared with the radial rotary hydraulic jet drilling technology adopting the small-radius rotary control device, the hydraulic jet drilling device has the advantages of large rotary radius, small propulsion resistance, large size and high performance of the water jet nozzle and the elastic drill rod, simple pushing and drilling process, low cost and the like. Compared with the directional drilling technology adopting the combination of the screw drilling tool and the conventional hard drill rod, the directional drilling device has the advantages of small radius along the coal body, simple process, low cost and the like, and is suitable for multi-branch directional rotary drilling in small areas.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The hydraulic deflecting directional drilling device is characterized by comprising a hydraulic deflecting directional drilling tool, an elastic drill rod, a pushing component and a high-pressure water injection pump; the elastic drill rod is in threaded connection with the hydraulic deflecting directional drilling tool, and the hydraulic deflecting directional drilling tool comprises a water jet nozzle and a deflecting auxiliary component;

The pushing component is connected with the elastic drill rod, and is connected with the high-pressure water injection pump through a high-pressure rubber pipe, and the high-pressure water injection pump injects water to the hydraulic deflecting directional drilling tool;

the water jet nozzle comprises a first water jet nozzle body, and the bottom to the head of the first water jet nozzle body are of an inclined structure;

2. The hydraulic deflecting directional drilling device is characterized by comprising a hydraulic deflecting directional drilling tool, an elastic drill rod, a pushing component and a high-pressure water injection pump; the elastic drill rod is in threaded connection with the hydraulic deflecting directional drilling tool, and the hydraulic deflecting directional drilling tool comprises a water jet nozzle and a deflecting auxiliary component;

The water jet nozzle comprises a second water jet nozzle body, wherein the bottom to the head of the second water jet nozzle body are of a vertical structure, a first guide jet hole and a second guide jet hole are arranged at opposite positions of the left side and the right side of the middle section of the second water jet nozzle body, and the caliber of the second guide jet hole is larger than that of the first guide jet hole;

3. The hydraulic deflecting directional drilling device is characterized by comprising a hydraulic deflecting directional drilling tool, an elastic drill rod, a pushing component and a high-pressure water injection pump; the elastic drill rod is in threaded connection with the hydraulic deflecting directional drilling tool, and the hydraulic deflecting directional drilling tool comprises a water jet nozzle and a deflecting auxiliary component;

The water jet nozzle comprises a third water jet nozzle body, and the bottom to the head of the third water jet nozzle body are of a vertical structure;

4. The hydraulic deflecting directional drilling device according to claim 3, wherein the top end of the sealing piston rod is hinged with the bottom end of the upper movable joint pipe, a compression spring is arranged between the lower end surface of the outlet end of the piston rod water guide pipe and the upper end surface of the first piston, and the compression spring is sleeved on the sealing piston rod; under the action of water pressure, after the sealing piston rod is extended, the sealing piston rod acts on the upper movable joint pipe to enable the third water jet nozzle body to generate a drilling deflection angle, and the extension state of the sealing piston rod can be adjusted by adjusting the extension amount of the water pressure control compression spring, so that the deflection angle of the hydraulic deflection directional drilling tool is controlled.

5. The hydraulic deflecting directional drilling device is characterized by comprising a hydraulic deflecting directional drilling tool, an elastic drill rod, a pushing component and a high-pressure water injection pump; the elastic drill rod is in threaded connection with the hydraulic deflecting directional drilling tool, and the hydraulic deflecting directional drilling tool comprises a water jet nozzle and a deflecting auxiliary component;

The water jet nozzle comprises a fourth water jet nozzle body, and the bottom to the head of the fourth water jet nozzle body are of a vertical structure;

6. The hydraulic deflecting directional drilling device is characterized by comprising a hydraulic deflecting directional drilling tool, an elastic drill rod, a pushing component and a high-pressure water injection pump; the elastic drill rod is in threaded connection with the hydraulic deflecting directional drilling tool, and the hydraulic deflecting directional drilling tool comprises a water jet nozzle and a deflecting auxiliary component;

the water jet nozzle comprises a fifth water jet nozzle body, and the bottom to the head of the fifth water jet nozzle body are of a vertical structure; the fifth water jet nozzle body is connected with the elastic drill rod through threads;

7. The hydraulic deflecting directional drilling device is characterized by comprising a hydraulic deflecting directional drilling tool, an elastic drill rod, a pushing component and a high-pressure water injection pump; the elastic drill rod is in threaded connection with the hydraulic deflecting directional drilling tool, and the hydraulic deflecting directional drilling tool comprises a water jet nozzle and a deflecting auxiliary component;

The water jet nozzle comprises a sixth water jet nozzle body, and the bottom to the head of the sixth water jet nozzle body are of a vertical structure;

The auxiliary deflecting component comprises an auxiliary oblique body, an emergent window, a guide inclined plane and a whole pushing rod, and the sixth water jet nozzle body is in threaded connection with the elastic drill rod; the auxiliary oblique body is in a whole body tube shape, an emergent window for the sixth water jet nozzle body to extend out is formed in the side wall of the auxiliary oblique body, a guide inclined plane is arranged on the inner wall of the auxiliary oblique body, one end of the guide inclined plane is welded and fixed with the upper edge of the auxiliary oblique body, the other end of the guide inclined plane is welded and fixed with the inner wall of the auxiliary oblique body, an axial included angle of the auxiliary oblique body and the auxiliary oblique body is gamma, the bottom end of the auxiliary oblique body is in threaded connection with a plurality of whole body pushing rods, the whole body pushing rods are in a whole body tube shape, the oblique auxiliary component is arranged in a drill hole, a guide inclined plane is provided for the sixth water jet nozzle body and elastic drill rods, and after the sixth water jet nozzle body is pushed to the guide inclined plane, the sixth water jet nozzle body is driven by the plurality of elastic drill rods to generate bending and is emergent and drilled by the emergent window along the guide inclined plane;

the pushing component is a rod type pushing component and comprises a sealing pushing rod and a drilling machine, the sealing pushing rod is in threaded connection with a plurality of elastic drill rods, the high-pressure sealing pushing rod is controlled through the clamping of the drilling machine, and the high-pressure sealing pushing rod is connected with a high-pressure water injection pump through a high-pressure rubber pipe.

8. The hydraulic deflecting directional drilling device is characterized by comprising a hydraulic deflecting directional drilling tool, an elastic drill rod, a pushing component and a high-pressure water injection pump; the elastic drill rod is in threaded connection with the hydraulic deflecting directional drilling tool, and the hydraulic deflecting directional drilling tool comprises a water jet nozzle and a deflecting auxiliary component;

The water jet nozzle comprises a seventh water jet nozzle body, and the bottom to the head of the seventh water jet nozzle body are of a vertical structure;

9. A drilling method of a hydraulic deflecting directional drilling device, which is realized by adopting the hydraulic deflecting directional drilling device as claimed in any one of claims 1 to 8, and specifically comprises the following steps: