JP7293497B2 - Hydraulic inclined directional drilling rig and method - Google Patents

Description

TECHNICAL FIELD The present invention relates to the technical field of disaster prevention and treatment of coal mine gas, and more particularly to a hydraulic tilting directional drilling rig and method.

TECHNICAL FIELD The present invention belongs to the technical field of disaster prevention and treatment of coal mine gas, and more particularly to a small radius radial rotation apparatus and method using hydraulic jet drilling in a coal seam.

Coal seam gas is one of the important unconventional natural gas resources, and when coal seam degassing of high-gas coal seams in coal mines, coal seam degassing from unreleased coal seams has a better effect. Whether or not it can be achieved depends mainly on the permeability of the coal bed. However, the coal seams in most mining areas in China belong to high gas low permeability coal beds, the coal is soft and the permeability is as low as 10 ⁻⁴ to 10 ⁻³ mD, and the coal seam permeability is the efficiency of coal mine degassing and utilization. Therefore, solving the problem of the difficulty of coal seam degassing of low-permeability coal seams is an important part of ensuring safe production in coal mines and increasing the productivity and utilization of coal seams. The research and development of technology and equipment for increasing the permeability of low-permeability coal seams and increasing the production of coal seam gas is an extremely difficult and urgent task. Research and development of new technology and equipment is an important issue that needs to be resolved quickly.

At present, high-density boring is mostly used to improve the permeability of the coal seam. Boring alone is used to improve the permeability. Yes, by adopting permeability enhancement technology to form multi-branched radial holes in the radial direction of the bore, the exposed area of the single-hole coal body can be greatly increased. When adopting radial hydraulic jet horizontal drilling technology, there are problems such as the small size of the borehole in the coal mine, the small turning radius, the large pushing resistance, the complicated process technology, etc., and the limited turning radius. Therefore, the selectable sizes of water jet nozzles and elastic drill pipes are generally small, the pushing performance of hydraulic drilling and elastic drill pipes is low, and when adopting directional drilling technology, the turning radius is large and the construction cost is high, etc. However, it is not suitable for increasing permeability in single-hole multi-branch small-area drilling.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hydraulic tilting directional drilling rig and method. The present invention is mainly applied to hydraulic tilting directional drilling of underground coal seams, and has the advantages of large turning radius, small indentation resistance, simple process and low cost compared with radial rotary hydraulic jet drilling technology. . Compared with horizontal well directional drilling technology, it has the advantages of small turning radius, simple process and low cost.

In order to achieve the above objects, the present invention provides the following technical solutions.

A hydraulic tilting directional drilling rig comprising a hydraulic tilting directional drilling tool, an elastic drill pipe, a pushing unit and a high pressure water injection pump, the elastic drill pipe being screwed to the hydraulic tilting directional drilling tool, said A hydraulic tilting directional drilling implement comprising a water jet nozzle and a tilting auxiliary unit,
The pushing unit is connected to an elastic drill pipe, the pushing unit is a rod-type pushing unit or a hydraulic pushing unit, the pushing unit is further connected to the high-pressure water injection pump through a high-pressure rubber pipe, and the high-pressure water injection pump is hydraulic. Water the sloping directional drilling implement.

Further, the water jet nozzle has a first water jet nozzle body, and the first water jet nozzle body has a structure that slopes from the bottom to the head,
Said tilting auxiliary unit comprises a directional guide body, inside said directional guide body, a directional connecting section, a first water conducting section and a first elastic drill pipe connecting section are arranged in order from top to bottom; The guide body is screwed into the first water jet nozzle body through the directional connection section, and screwed into the elastic drill pipe through the first elastic drill pipe connection section, the first water jet nozzle body is Communicate with the elastic drill pipe through the directional guide body,
there is a misalignment angle δ between the centerline of the directional connection section and the centerline of the first elastic drill pipe connection section, and the centerline of the first water jet nozzle body and the centerline of the directional connection section overlap;
The pushing unit is a rod-type pushing unit, comprising a sealing pushing rod and a boring machine, the sealing pushing rod is screwed into a plurality of connected elastic drill pipes, and a high-pressure sealing pushing rod is clamped and controlled by the boring machine. , is connected to 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 second water jet nozzle body is a vertical structure from the bottom to the head, and the left and right sides of the middle section of the second water jet nozzle body A first guide injection hole and a second guide injection hole are provided at opposing positions, and the diameter of the second guide injection hole is larger than that of the first guide injection hole,
The tilting auxiliary unit comprises a first flexible water conduit, and the first flexible water conduit is internally provided with a first nozzle connection section, a second water conveyance section and a second elastic drill pipe connection section in order from top to bottom, A first flexible water conduit is screwed into said second water jet nozzle body through a first nozzle connection section, and screwed into said elastic drill pipe through a second elastic drill pipe connection section, said water jet nozzle body communicates with the elastic drill pipe through the first flexible water conduit, the hole diameter of the second guide injection hole is larger than that of the first guide injection hole, and when the water jet drills, the second water jet nozzle body produces a side force F and acting on the first flexible conduit, thereby achieving directivity of the drilling implement,
The pushing unit is a rod-type pushing unit, comprising a sealing pushing rod and a boring machine, the sealing pushing rod is screwed into a plurality of connected elastic drill pipes, and a high-pressure sealing pushing rod is clamped and controlled by the boring machine. , is connected to a high-pressure water injection pump through a high-pressure rubber pipe.

Further, the water jet nozzle comprises a fifth water jet nozzle body, the fifth water jet nozzle body has a vertical structure from the bottom to the head, and the fifth water jet nozzle body is screwed to the elastic drill pipe. ,
Said tilting auxiliary unit comprises a wire fixing ring, a wire and a wire pulling winch, the wire is fixedly connected to the front end holding part of the elastic drill pipe through the wire fixing ring, and the rear end of the wire is wound around the wire pulling winch. The wire pulling winch is fixed outside the borehole, and by pulling the wire, the elastic drill pipe is controlled to produce deflection, causing the water jet nozzle to produce a drilling deviation angle,
The pushing unit is a rod-type pushing unit, comprising a sealing pushing rod and a boring machine, the sealing pushing rod is screwed into a plurality of connected elastic drill pipes, and a high-pressure sealing pushing rod is clamped and controlled by the boring machine. , is connected to a high-pressure water injection pump through a high-pressure rubber pipe.

Further, the water jet nozzle comprises a sixth water jet nozzle body, the sixth water jet nozzle body having a vertical structure from the bottom to the head,
The auxiliary tilting unit comprises an auxiliary tilting body, an injection window, a guide ramp and a general pushing rod, the sixth water jet nozzle body is screwed into the elastic drill pipe, and the auxiliary tilting body is tubular in its entirety. a side wall of the auxiliary tilting body is provided with an injection window for the sixth water jet nozzle body to extend; It is welded to the upper edge of the body, the other end is welded to the inner wall of the auxiliary tilting body, the axial included angle with the auxiliary tilting body is γ, and the bottom end of the auxiliary tilting body is a plurality of whole The pushing rod is screwed together, the whole pushing rod is generally tubular, the auxiliary tilting auxiliary unit is disposed in the borehole, provides a guide ramp for the sixth water jet nozzle body and the elastic drill pipe, and has a plurality of The elastic drill pipe drives the sixth water jet nozzle body to push it to the guide slope, then bends, and is ejected from the injection window along the guide slope for drilling,
The pushing unit is a rod-type pushing unit, comprising a sealed pushing rod and a boring machine, the sealed pushing rod is screwed into a plurality of connected elastic drill pipes, and a high-pressure sealed pushing rod is clamped and controlled by the boring machine; It is connected to a high-pressure water injection pump via a high-pressure rubber pipe.

Further, the water jet nozzle comprises a seventh water jet nozzle body, the seventh water jet nozzle body having a vertical structure from the bottom to the head,
The auxiliary tilting unit comprises an auxiliary tilting body, an injection window, a guide ramp and a general pushing rod, the seventh water jet nozzle body is screwed into the elastic drill pipe, and the auxiliary tilting body is tubular in its entirety. a side wall of the auxiliary tilting body is provided with an injection window for the seventh water jet nozzle body to extend; It is welded to the upper edge of the body, the other end is welded to the inner wall of the auxiliary tilting body, the axial included angle with the auxiliary tilting body is γ, and the bottom end of the auxiliary tilting body is a plurality of whole threadedly engaged with a pusher rod, said overall pusher rod being generally tubular;
said pushing unit is a hydraulic pushing unit, comprising a second piston, a piston rod, a piston rod water conducting eyelet, a wire rope, a sealed bearing, a rubber seal ring, a liquid injection joint, a wire rope winch, a limiting ramp and a bearing; A piston is attached to the piston rod, one end of the piston rod is connected to and screwed to an elastic drill pipe, and the other end is connected to a wire rope through a bearing so as to be relatively rotatable. A rod water-conducting eyelet is opened and the second piston is sealingly slidable along the overall push-on rod, the inner wall of the auxiliary ramping body, and restricts the second piston to the inner wall of the mouth of the auxiliary ramping body. The limiting bevel which has the function of preventing leakage is fixed by welding, and the liquid injection joint has one end connected and screwed to the overall push-in rod, and the other end screwed to the sealing bearing, and the sealing bearing is provided with a rubber seal ring inside. The wire rope passes through the inner bore of the rubber seal ring and sealingly slides along the sealed bearing and is fixed and pulled by the wire rope winch.

Further, the wire rope comprises a wire rope body and a sealant coated on the outside of the wire rope body.

A hydraulic tilting directional drilling method is provided using the above hydraulic tilting directional drilling equipment, specifically comprising:
step 1, after drilling to the interior of the coal seam, using a pushing unit, an elastic drill pipe, to feed a water jet nozzle of a hydraulic tilting directional drilling tool to a designed tilting drilling position in the borehole;
Connect the rod-type pushing unit or hydraulic propulsion unit with the high-pressure water injection pump through the high-pressure rubber pipe, turn on the high-pressure water injection pump, and the high-pressure water will flow through the elastic drill pipe into the water jet of the hydraulic tilting directional drilling equipment. Step 2 of flowing to a nozzle to perform hydraulically tilted directional crushing to generate directional hydraulic injection holes whose centerline direction is different from the centerline of the borehole;
The pushing unit is used to continue pushing, the elastic drill pipe is bent under force, and the hydraulic tilting directional drilling instrument is driven to gradually directional drilling along the directional hydraulic jet hole, and the hydraulic tilting directional Step 3 of forming a borehole;
step 4 of drawing the elastic drill pipe and the hydraulically inclined directional drilling tool into the borehole using a pushing unit;
Utilizing the pushing unit to drive the elastic drill pipe, hydraulic tilting directional drilling tool to rotate or move to another designed directional jet drilling direction, and repeat steps 3-4 for multi-cluster hydraulic tilting orientation. and step 5 of completing the jet drilling.

The beneficial effects of the present invention compared to the prior art are as follows. The present invention employs a hydraulic tilting directional drilling tool in place of the conventional small radius rotation control device to provide a hydraulic tilting directional drilling tool in which an elastic drill pipe pushes and gradually rotates drilling along the coal body. Forming the borehole, the size of the water jet nozzle and the elastic drill pipe are not limited by the size of the small radius rotation control device, and a larger turning radius is provided for the rotation of the hydraulic tilting directional drilling tool and the elastic drill pipe. Compared with the radial rotation water jet drilling technology that adopts the small radius rotation control device, the rotation radius is large, the pushing resistance is small, the water jet nozzle and elastic drill pipe are large in size and the performance is high, and the pushing and It has advantages such as simple excavation process and low cost. Compared to the directional drilling technology that employs a combination of a screw drilling tool and an ordinary hard drill pipe, it has advantages such as a small turning radius along the coal body, a simple process, and a low cost. Suitable for branch directional rotary drilling.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural schematic diagram of a hydraulic tilting directional drilling rig according to the present invention, and is a structural schematic diagram of Embodiment 1 of the present invention; FIG. 4 is a schematic diagram of the mounting structure of the water jet nozzle and the tilting auxiliary unit in Embodiment 1 of the present invention; FIG. 7 is a schematic diagram of the mounting structure of the water jet nozzle and the tilting auxiliary unit in Embodiment 2 of the present invention; FIG. 2 is a schematic diagram of a drilling method of the tilted directional drilling rig in Examples 1 and 2; FIG. 10 is a schematic diagram of the mounting structure of the water jet nozzle and the tilting auxiliary unit in Embodiment 3 of the present invention; FIG. 3 is a schematic diagram of a tilted directional excavating device and an excavating method thereof according to Embodiment 3 of the present invention; FIG. 4 is a schematic diagram of an inclined directional excavating device and an excavating method thereof according to Embodiment 4 of the present invention; FIG. 4 is a structural schematic diagram of a water jet nozzle and an elastic drill pipe in Embodiment 4 of the present invention; FIG. 9 is a sectional view taken along line aa of FIG. 8; FIG. 4 is a structural schematic diagram of a tilting auxiliary unit according to Embodiment 4 of the present invention; FIG. 5 is a schematic diagram of an inclined directional excavating device and an excavating method thereof according to Embodiment 5 of the present invention; FIG. 2 is a schematic diagram of hydraulic fracturing in a coal seam hydraulic tilting directional drilling section; 1 is a first structural schematic diagram of an elastic drill pipe in a specific embodiment of the present invention; FIG. FIG. 14 is a cross-sectional view taken along line AA of FIG. 13; Fig. 2 is a second structural schematic diagram of an elastic drill pipe in a specific embodiment of the present invention; FIG. 16 is a cross-sectional view taken along line bb of FIG. 15;

The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Examples, not all implementations. Based on the embodiments of the present invention, all other embodiments that a person skilled in the art can come up with without creative efforts shall fall within the protection scope of the present invention.

Example 1
As shown in FIGS. 1-2, a hydraulic tilting directional drilling rig comprising a hydraulic tilting directional drilling tool 1, an elastic drill pipe 2, a pushing unit 3 and a high pressure water injection pump 5, said The elastic drill pipe 2 is screwed into a hydraulic tilting directional drilling tool 1, said hydraulic tilting directional drilling tool 1 comprises a water jet nozzle 11 and a tilting auxiliary unit 12,
The pushing unit 3 is connected to the elastic drill pipe 2, the pushing unit 3 is a rod-type pushing unit or a hydraulic pushing unit, the pushing unit 3 is further connected to the high-pressure water injection pump 5 through a high-pressure rubber pipe, A high pressure water injection pump 5 injects water into the hydraulic tilting directional drilling implement 1 .

The water jet nozzle 11 has a first water jet nozzle body 1101, and the first water jet nozzle body 1101 has a structure inclined from the bottom to the head,
Said tilting auxiliary unit 12 comprises a directional guide body 1201, inside said directional guide body 1201 are a directional connecting section 12011, a first water conducting section 12012 and a first elastic drill pipe connecting section 12013 in order from top to bottom. The directional guide body 1201 is screwed into the first water jet nozzle body 1101 through the directional connection section 12011 and screwed into the elastic drill pipe 2 through the first elastic drill pipe connection section 12013. and the first water jet nozzle body 1101 communicates with the elastic drill pipe 2 through the directional guide body 1201,
There is a deviation angle δ between the centerline of the directional connection section 12011 and the centerline of the first elastic drill pipe connection section 12013, the deviation angle is δ<30°, and by setting the deviation angle δ , causing the water jet nozzle 11 to generate a jet drilling deviation angle that does not correspond to the axial direction of the borehole, the center line of the first water jet nozzle body 1101 and the center line of the directional connection section 12011 overlapping,
The pushing unit 3 is a rod-type pushing unit, which includes a sealing pushing rod 31 and a boring machine 32, the sealing pushing rod 31 is screwed to a plurality of connected elastic drill pipes 2, and a high-pressure sealing pushing rod 31 is Controlled by a boring machine 32, the high-pressure sealing pushing rod 31 is connected to the high-pressure water injection pump 5 through a high-pressure rubber pipe.

Example 2
Differences from Example 1 are as follows.

As shown in FIG. 3, the water jet nozzle 11 comprises a second water jet nozzle body 1102, the second water jet nozzle body 1102 has a vertical structure from the bottom to the head, and the second water jet nozzle body 1102 A first guide injection hole 11021 and a second guide injection hole 11022 are provided at opposite positions on the left and right sides of the middle section of the, and the hole diameter of the second guide injection hole 11022 is larger than that of the first guide injection hole 11021,
Said tilting auxiliary unit 12 comprises a first flexible water conduit 1202, inside the first flexible water conduit 1202 from top to bottom a first nozzle connection section 12021, a second water conveyance section 12022 and a second elastic drill pipe connection section 12023. , the first flexible water conduit 1202 is screwed into the second water jet nozzle body 1102 through the first nozzle connection section 12021, and the elastic drill pipe through the second elastic drill pipe connection section 12023. 2, the water jet nozzle body 21 communicates with the elastic drill pipe 2 through the first flexible conduit 1202, the hole diameter of the second guide injection hole 11022 is larger than that of the first guide injection hole 11021, and the water When the jet drills, the second water jet nozzle body 1102 generates a side force F acting on the first flexible water conduit 1202, thereby realizing the directivity of the drilling implement,
The pushing unit 3 is a rod-type pushing unit, which includes a sealing pushing rod 31 and a boring machine 32, the sealing pushing rod 31 is screwed to a plurality of connected elastic drill pipes 2, and a high-pressure sealing pushing rod 31 is Controlled by a boring machine 32, the high-pressure sealing pushing rod 31 is connected to the high-pressure water injection pump 5 through a high-pressure rubber pipe.

Example 3
Differences from Example 1 are as follows.

As shown in FIGS. 5 and 6, the water jet nozzle 11 comprises a fifth water jet nozzle body 1105, the fifth water jet nozzle body 1105 has a vertical structure from the bottom to the head, and the fifth water jet The nozzle body 1105 is screwed onto the elastic drill pipe 2,
Said tilting auxiliary unit 12 comprises a wire fixing ring 12117, a wire 12118 and a wire pulling winch 12119, the wire 12118 is fixedly connected to the front end holding part of the elastic drill pipe 2 via the wire fixing ring 12117, and the wire 12118 is fixed. The rear end is wound on a wire pulling winch 12119, which is fixed outside the borehole, and by pulling the wire 12118, the elastic drill pipe 2 is controlled to generate deflection, and the water jet nozzle 11 is provided with drilling slippage. generate an angle
The pushing unit 3 is a rod-type pushing unit, which includes a sealing pushing rod 31 and a boring machine 32, the sealing pushing rod 31 is screwed to a plurality of connected elastic drill pipes 2, and a high-pressure sealing pushing rod 31 is Controlled by a boring machine 32, the high-pressure sealing pushing rod 31 is connected to the high-pressure water injection pump 5 through a high-pressure rubber pipe.

Example 4
Differences from Example 1 are as follows.

7 to 10, the water jet nozzle 11 comprises a sixth water jet nozzle body 1106, the sixth water jet nozzle body 1106 has a vertical structure from the bottom to the head,
The auxiliary tilting unit 12 comprises an auxiliary tilting body 12120, an injection window 12121, a guide slope 12122 and a general pushing rod 12123, the sixth water jet nozzle body 1106 is screwed into the elastic drill pipe 2, and the auxiliary tilting The mounting body 12120 has a tubular shape as a whole, and an exit window 12121 for extending the sixth water jet nozzle body 1106 is formed on the side wall of the auxiliary tilting body 12120, and a guide slope is formed on the inner wall of the auxiliary tilting body 12120. One end of the guide slope 12122 is welded to the upper edge of the auxiliary tilting body 12120, the other end is welded to the inner wall of the auxiliary tilting body 12120, and has an axial included angle with the auxiliary tilting body 12120. γ<30°, the bottom end of the auxiliary tilting body 12120 is screwed into a plurality of general pushing rods 12123, the general pushing rod 12123 is generally tubular, and the auxiliary tilting auxiliary The unit 12 is placed in the borehole to provide a guide ramp for the sixth water jet nozzle body 1106 and the elastic drill pipe 2 , the plurality of elastic drill pipes 2 driving the sixth water jet nozzle body 1106 to form the guide ramp 12122 . After pushing up to, bending occurs, ejecting from the injection window 12121 along the guide slope 12122 and excavating,
The pushing unit 3 is a rod-type pushing unit, which includes a sealing pushing rod 31 and a boring machine 32, the sealing pushing rod 31 is screwed to a plurality of connected elastic drill pipes 2, and a high-pressure sealing pushing rod 31 is a boring machine. Controlled by the machine 32, the high-pressure sealing pushing rod 31 is connected to the high-pressure water injection pump 5 through a high-pressure rubber pipe.

Example 5
Differences from Example 1 are as follows.

As shown in FIG. 11, the water jet nozzle 11 comprises a seventh water jet nozzle body 1107, the seventh water jet nozzle body 1107 has a vertical structure from the bottom to the head,
The auxiliary tilting unit 12 comprises an auxiliary tilting body 12120, an injection window 12121, a guide slope 12122 and a general pushing rod 12123, the seventh water jet nozzle body 1107 is screwed into the elastic drill pipe 2, and the auxiliary tilting The attachment body 12120 has a tubular shape as a whole, and an exit window 12121 for extending the seventh water jet nozzle main body 1107 is formed on the side wall of the auxiliary inclination body 12120, and a guide slope is formed on the inner wall of the auxiliary inclination body 12120. One end of the guide slope 12122 is welded to the upper edge of the auxiliary tilting body 12120, the other end is welded to the inner wall of the auxiliary tilting body 12120, and has an axial included angle with the auxiliary tilting body 12120. γ<30°, the bottom end of the auxiliary tilting body 12120 is screwed into a plurality of overall pushing rods 12123, and the overall pushing rods 12123 are tubular as a whole;
Said pushing unit 3 is a hydraulic pushing unit, comprising a second piston 301, a piston rod 302, a piston rod water conducting eyelet 303, a wire rope 304, a sealed bearing 305, a rubber seal ring 306, a liquid injection joint 307, a wire rope winch 308, a limit The second piston 301 is attached to the piston rod 302, one end of which communicates with the elastic drill pipe 2 and is screwed thereon, and the other end of which is connected to the wire through the bearing 310. The second piston 301 is rotatably connected to the rope 304, the outer wall of the piston rod 302 is provided with a piston rod water-conducting eyelet 303, and the second piston 301 is sealed and slidable along the inner wall of the overall pushing rod 12123 and the auxiliary tilting body 12120. A restricting slope 309 is welded to the inner wall of the mouth of the auxiliary tilting body 12120 to restrict the movement of the second piston 301 and prevent dripping. The other end is screwed into a seal bearing 305, a rubber seal ring 306 is provided inside the seal bearing 305, and the wire rope 304 passes through the inner hole of the rubber seal ring 306 and is threaded into the seal bearing 305. It slides sealingly along and is secured and towed by a wire rope winch 308 .

The wire rope 304 includes a wire rope body 3041 and a sealant 3042 covering the outside of the wire rope body 3041 .

Example 6
Utilizing the hydraulic tilting directional drilling rig of Examples 1-5 to provide a hydraulic tilting directional drilling method, specifically comprising:
step 1 of sending a water jet nozzle of a hydraulic tilting directional drilling instrument 1 to a designed tilting drilling position by means of a pushing unit 3 and an elastic drill pipe 2 after boring into the interior of the coal seam;
The rod-type pushing unit or hydraulic propulsion unit is connected with the high-pressure water injection pump 5 through the high-pressure rubber pipe, the high-pressure water injection pump 5 is turned on, and the high-pressure water flows through the elastic drill pipe 2 into the hydraulic tilting directional drilling instrument. 1 water jet nozzle 11 to perform hydraulic tilting directional coal crushing to generate directional hydraulic injection holes whose center line direction is different from the center line of the borehole;
The pushing unit 3 is used to continue pushing, the elastic drill pipe 2 is bent under force, and the hydraulic tilting directional drilling tool 1 is driven to gradually directional drill along the directional hydraulic jet hole, and the hydraulic tilting is performed. step 3 of forming a directional borehole;
step 4 of drawing the elastic drill pipe 2 and the hydraulic tilting directional drilling instrument 1 into the borehole 6 by means of the pushing unit 3;
The pushing unit is used to drive the elastic drill pipe 2, hydraulic tilting directional drilling implement 1 to rotate or move to another designed directional jet drilling direction, and repeat steps 3-4 for multi-cluster hydraulic tilting. and Step 5 of completing the directional jet drilling.

As shown in FIGS. 13 and 14, the first structure of the elastic drill pipe 2 of the present invention is specifically as follows. The elastic drill pipe 2 comprises a flexible inner pipe 201 and an elastic out-rod 202. At least one elastic out-rod 202 is axially fixed outside the flexible inner pipe 201. A front end connector 205 and a rear connector 206 are provided at both ends respectively, the at least one elastic outrod 202 is fixed to the outside of the flexible inner pipe 201 by a plurality of buckles 204, and the plurality of buckles 204 are attached to the flexible inner pipe. 201, the buckle 204 is provided with a plurality of through-holes for the elastic out-rod 202 to pass through, and the elastic out-rod 202 extends axially with respect to the buckle 204 in the through-hole. The front end of the elastic out rod 202 and the front end of the flexible inner pipe 201 are fixedly connected via a first front end pressing portion 203 . The resilient outrod 202 is made of spring steel or nickel-titanium alloy material. Flexible inner pipe 201 may employ a rubber tube.

As shown in FIGS. 15 and 16, the second structure of the elastic drill pipe 2 of the present invention is specifically as follows. The elastic drill pipe 2 comprises a flexible inner pipe 201 and an elastic out-rod 202. At least one elastic out-rod 202 is axially fixed outside the flexible inner pipe 201. A front end connector 205 and a rear connector 206 are provided at both ends, respectively, the at least one elastic outrod 202 and the front end of the flexible inner pipe 201 are fixed via a second front end holding portion 207, and the rear end is a rear end holding portion. 208, and between the second front end pressing portion 207 and the rear end pressing portion 208, the elastic out rod 202 and the flexible inner pipe 201 are fixed via a flexible fixing body 209, and the flexible fixing body 209 is bonded. agents, nonwovens or flexible plastics. The nonwoven fabric and the flexible plastic fix the elastic out rod 202 and the flexible inner pipe 201 by winding, and the adhesive fixes the elastic out rod 202 and the flexible inner pipe 201 by adhesion.

The resilient outrod 202 is a solid cylinder or hollow cylinder tube or strong spring tube.

Also, instead of the elastic drill pipe 2 in the present invention, a continuous oil pipe, flexible drill pipe, polyethylene pipe or high pressure rubber pipe may be used. Depending on the difficulty of feeding the elastic drill pipe into the borehole, in all embodiments of the invention, the elastic drill pipe is formed by threading one or more elastic drill pipes end-to-end (quantity required). selected accordingly).

The water jet nozzle 11 in the present invention is a self-advancing self-rotating jet nozzle or a self-rotating jet nozzle or a multi-hole jet nozzle. 11 and larger than the elastic drill pipe 2 outer diameter. All water jet nozzles 11 in this embodiment are provided with a plurality of front jet outlets and a plurality of rear jet outlets.

In the following, a detailed description will be given of the hydraulic tilting directional drilling method using the hydraulic tilting directional drilling equipment in each embodiment.

1. When using the hydraulic tilting directional drilling equipment in Examples 1 and 2, the hydraulic tilting directional drilling method is specifically as follows.

In step 11, after boring to the inside of the coal seam, the water jet nozzle 11 of the hydraulic tilting directional drilling instrument, the tilting auxiliary unit 12, and the elastic drill pipe 2 are connected in order, and the pushing unit 3 (rod type pushing unit). to deliver the hydraulic tilted directional drilling implement 1 to the designed tilted drilling position in the borehole 6,
In step 21, the sealing pushing rod 31 is connected with the high-pressure water injection pump 5 through the high-pressure rubber pipe, the high-pressure water injection pump 5 is turned on, and the high-pressure water flows through the sealing pushing rod 31, the elastic drill pipe 2, and the hydraulic tilting Flowing to the directional drilling tool 1 to perform hydraulic tilting directional crushing, generating directional hydraulic injection holes whose center line direction is different from the center line of the borehole,
In step 31, the drilling machine 32 is used to push the sealed pusher rod 31, the elastic drill pipe 2 flexes under the thrust of the sealed pusher rod 31 and the reaction force of the coal wall, and the hydraulic tilting directional drilling instrument 1 to gradually directional excavate along the directional hydraulic injection hole to form a hydraulic inclined directional excavation hole 7,
In step 41, the drilling machine 32 is used to draw the sealing pushing rod 31, and further draw the elastic drill pipe 2 and the hydraulic tilting directional drilling tool 1 to the bottom of the borehole 6;
In step 52, the boring machine 32 is used to drive the sealing push rod 31 and the elastic drill pipe 2, and the hydraulic tilting directional drilling implement 1 is rotated in another designed directional jet drilling direction, step Repeat 31-41 to complete the multi-cluster hydraulic tilted directional jet drilling.

2. As shown in FIG. 6, the hydraulic tilting directional excavation method using the hydraulic tilting directional excavation device in the third embodiment is specifically as follows.

In step 13, after drilling to the inside of the coal seam, the hydraulic tilting directional drilling tool 1, the elastic drill pipe 2, and the sealed pushing rod 31 are connected in order, and the boring machine 32 is used to connect in order 1. feeding the hydraulic tilting directional drilling instrument 1 to the bottom of the borehole by means of a sealed pushing rod or rods 31;
In step 23, the wire pulling winch 12119 is utilized to pull back the wire 12118 slightly, and under the torque action of the wire 12118 and the sealing pushing rod 31, the elastic drill pipe 2 flexes slightly, pulling the sealing pushing rod 31 through the high pressure rubber tube. through the high-pressure water injection pump 5, turn on the high-pressure water injection pump 5, the high-pressure water flows through the sealed pushing rod 31, the elastic drill pipe 2 into the hydraulic tilting directional drilling equipment 1, and the hydraulic tilting directivity Coal crushing is performed to generate directional hydraulic injection holes whose center line direction is different from the center line of the borehole,
In step 33, the pulling of the wire 12118 by the wire pulling winch 12119 is stopped, the wire 12118 is in a slack state, and the boring machine 32 is used to push in the sealing pushing rod 31 and the elastic drill pipe 2 to drive the wire 12118. The wire pulling winch 12119 is pulled out, the hydraulic tilting directional drilling instrument 1 is driven to drill along the directional hydraulic injection hole, and after drilling for a predetermined distance, the wire pulling winch 12119 is reused to slightly pull the wire 12118. to regenerate the directional hydraulic injection hole by torque action, calculate the drilling distance with reference to the designed directional drilling trajectory, and repeat the above directivity and drilling steps to form the hydraulic tilted directional drillhole 8 to form
At step 43 , the boring machine 32 is utilized to pull the sealed push rod 31 in while the wire pulling winch 12119 pulls the wire 12118 to pull the elastic drill pipe 2 and hydraulic ramped directional drilling implement 1 into the bottom of the borehole 6 . Realize that
In step 53, the boring machine 32 is used to drive the sealing push rod 31 and the elastic drill pipe 2, and the hydraulic tilting directional drilling implement 1 to rotate in another designed directional jet drilling direction. and repeat steps 33-43 to complete the multi-cluster hydraulic graded directional jet drilling.

In step 61, the boring machine 32 is used to drive the sealed push rod 31 and the elastic drill pipe 2, and the hydraulic tilting directional drilling implement 1 is moved to another designed directional jet drilling position. , steps 13-53 are repeated to complete the multi-section hydraulic tilted directional jet drilling.

3. As shown in FIG. 7, using the hydraulic tilting directional drilling rig in Embodiment 4 to provide a hydraulic tilting directional drilling method.

In step 14, after using the boring machine 32 to construct the multi-section branch excavation main hole 205 along the coal seam, the boring machine 32 is used to design the auxiliary tilting body 12120 with a plurality of overall pushing rods 12123. feeds and locks into a tilted directional drilling position,
In step 24, the sixth water jet nozzle body 1106, the plurality of elastic drill pipes 2 and the sealing pushing rod 31 are connected in order, and the boring machine 32 is used to connect one or more sealing pushing rods connected in order. The rod 31 feeds the hydraulic tilting directional drilling implement along the interior of the overall pushing rod 12123 to the auxiliary tilting body 12120 to complete the auxiliary guide tilting;
In step 34, turn on the high-pressure water injection pump 5, high-pressure water flows through the sealing pushing rod 31, the elastic drill pipe 2 to the sixth water jet nozzle body 1106 to perform hydraulic tilting directional coal crushing, and the centerline generates a directional hydraulic injection hole whose direction is different from the centerline of the borehole,
In step 44 , the boring machine 32 is used to push the sealing pushing rod 31 to drive the elastic drill pipe 2 and the sixth water jet nozzle body 1106 to continue drilling along the directional hydraulic injection hole, and the branch hole 206 . form,
in step 54, use the boring machine to draw the sealing pushing rod 31 to finish drawing the elastic drill pipe 2 and the sixth water jet nozzle body 1106 into the auxiliary tilting body 12120;
At step 62, the boring machine 32 is utilized to drive the auxiliary tilting auxiliary unit 12 to rotate to another designed directional jet drilling direction, and steps 34-54 are repeated to repeat the multi-cluster hydraulic tilting directional. Complete jet drilling.

In step 71, the boring machine is utilized to drive the auxiliary tilting auxiliary unit to another designed directional jet drilling position, and steps 34-62 are repeated to perform multi-section hydraulic tilting directional jet drilling. to complete.

4. As shown in FIG. 11, the hydraulic tilting directional drilling rig in Example 5 is used to provide a hydraulic tilting directional drilling method.

In step 15, after the drilling machine 32 is used to construct the multi-section branch excavation main hole 205 along the coal seam, the boring machine 32 is used to design the auxiliary tilting body 12120 with a plurality of overall pushing rods 12123. feeds and locks into a tilted directional drilling position,
In step 25, the water jet nozzle 11, the plurality of elastic drill pipes 2 are connected and sent to the overall pushing rod 12123, the piston rod 302 is connected with the rear end of the elastic drill pipe 2 and sent to the overall pushing rod 12123,
After connecting the liquid injection joint 307 and the overall pushing rod 12123, the wire rope 304 is fixedly connected to the other end of the piston rod 302 through the rubber seal ring 306, finally connecting the sealing bearing 305 and the liquid injection joint 307, Connect the liquid injection joint 307 with the high pressure water injection pump through a high pressure rubber tube to complete the installation.

In step 35, turn on the high-pressure water injection pump 5, the high-pressure water flows through the liquid injection joint 307, the overall pushing rod 12123, and acts on the second piston 301 to generate thrust, the multiple elastic drill pipes 2 and the water jet At the same time pushing the nozzle 11 forward, turn on the wire rope winch 308, control the second piston 301 by the special wire rope 304, further control the pushing speed of the elastic drill pipe 2 and the water jet nozzle 11,
In step 45, after the elastic drill pipe 2 and the water jet nozzle 11 are pushed into the auxiliary tilting body 12120, the auxiliary tilting is completed, and at the same time, the high-pressure water is injected into the piston rod water-conducting eyelet 303, the piston rod 302, and the multiple elastic drills. It flows through the pipe 2 to the water jet nozzle 11, and the water jet nozzle 11 jets to realize directional jet coal breaking drilling.

In step 55, after drilling the designed distance, the high-pressure water injection pump 5 is stopped, the special wire rope 304 is pulled by the wire rope winch 308, and the elastic drill pipe 2 and water jet nozzle 11 are driven to drive the auxiliary slope. Pull into attachment 12120 .

At step 63, the boring machine is utilized to drive the auxiliary tilting unit 12 to rotate in another designed direction, and steps 35-55 are repeated to complete the multi-cluster hydraulic tilting directional jet drilling.

In step 72, the boring machine is utilized to drive the auxiliary tilter to another designed directional jet drilling position and steps 35-63 are repeated to perform multi-section hydraulic tilting directional jet drilling. complete.

As shown in FIG. 12, upon completion of hydraulic tilting directional drilling and formation of a single-cluster or multi-cluster hydraulic tilting directional injection borehole, the coalbed hydraulic tilting directional drilling section 101 includes hydraulic fracturing. The tools 102 are utilized to hydraulically fracturing the sealing sections in series to achieve guidance for hydraulic fracturing crack extension and to increase the crack system.

The present invention employs a hydraulic tilting directional drilling tool in place of the conventional small radius rotation control device to provide a hydraulic tilting directional drilling tool in which an elastic drill pipe pushes and gradually rotates drilling along the coal body. Forming the borehole, the size of the water jet nozzle and the elastic drill pipe are not limited by the size of the small radius rotation control device, and a larger turning radius is provided for the rotation of the hydraulic tilting directional drilling tool and the elastic drill pipe. Compared with the radial rotation water jet drilling technology that adopts the small radius rotation control device, the rotation radius is large, the pushing resistance is small, the water jet nozzle and elastic drill pipe are large in size and the performance is high, and the pushing and It has advantages such as simple excavation process and low cost. Compared to the directional drilling technology that employs a combination of a screw drilling tool and an ordinary hard drill pipe, it has advantages such as a small turning radius along the coal body, a simple process, and a low cost. Suitable for branch directional rotary drilling.

Although embodiments of the present invention have been illustrated and described, those skilled in the art can make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the invention. , the scope of the invention is limited by the appended claims and their equivalents.

1. Hydraulic tilting directional drilling implement;
2, elastic drill pipe;
201, flexible inner pipe;
202, elastic outrod;
203, first front end holding part;
204, the buckle;
205, front end connector;
206, rear connector;
207, second front end holding part;
208, rear end holding part;
209, flexible fixing member;
3, pushing unit;
31, sealing push rod;
32, boring machine;
301, second piston;
302, piston rod;
303, piston rod water conducting eyelet;
304, wire rope;
3041, wire rope body;
3042, sealant;
305, sealed shaft;
306, rubber seal ring;
307, liquid injection joint;
308, wire rope winch;
309, limiting slope;
310, bearing;
5, high pressure water injection pump;
6, borehole;
7. Hydraulic tilted directional drilling;
8, hydraulic straight borehole;
11, water jet nozzle;
1101, the first water jet nozzle body;
1102, the second water jet nozzle body;
11021, first guide injection hole;
11022, second guide injection hole;
1105, fifth water jet nozzle body;
1106, the sixth water jet nozzle body;
1107, seventh water jet nozzle body;
12, tilting auxiliary unit;
1201, directional guide body;
12011, directional connection section;
12012, first water conveying section;
12013, first elastic drill pipe connection section;
1202, first flexible conduit;
12021, first nozzle connection section;
12022, second water conveying section;
12023, second elastic drill pipe connection section;
12117, wire fixing ring;
12118, wire;
12119, wire traction winch;
12120, auxiliary tilting body;
12121, exit window;
12122, guide ramp;
12123, overall pushing rod;

Claims (7)

A hydraulic tilting directional drilling rig comprising a hydraulic tilting directional drilling tool, an elastic drill pipe, a pushing unit and a high pressure water injection pump, the elastic drill pipe being screwed to the hydraulic tilting directional drilling tool, said A hydraulic tilting directional drilling implement comprising a water jet nozzle and a tilting auxiliary unit,
The pushing unit is connected to an elastic drill pipe, the pushing unit is a rod-type pushing unit or a hydraulic pushing unit, the pushing unit is further connected to the high-pressure water injection pump through a high-pressure rubber pipe, and the high-pressure water injection pump is hydraulic. A hydraulic tilted directional drilling rig characterized by watering a tilted directional drilling implement. The water jet nozzle comprises a first water jet nozzle body, the first water jet nozzle body having a structure that slopes from the bottom to the head,
Said tilting auxiliary unit comprises a directional guide body, inside said directional guide body, a directional connecting section, a first water conducting section and a first elastic drill pipe connecting section are arranged in order from top to bottom; The guide body is screwed into the first water jet nozzle body through the directional connection section, and screwed into the elastic drill pipe through the first elastic drill pipe connection section, the first water jet nozzle body is Communicate with the elastic drill pipe through the directional guide body,
there is a misalignment angle δ between the centerline of the directional connection section and the centerline of the first elastic drill pipe connection section, and the centerline of the first water jet nozzle body and the centerline of the directional connection section overlap;
The pushing unit is a rod-type pushing unit, comprising a sealing pushing rod and a boring machine, the sealing pushing rod is screwed into a plurality of connected elastic drill pipes, and a high-pressure sealing pushing rod is clamped and controlled by the boring machine. 2. The hydraulic tilting directional drilling rig according to claim 1, which is connected to a high pressure water injection pump through a high pressure rubber pipe. Said water-jet nozzle comprises a second water-jet nozzle body, the second water-jet nozzle body has a vertical structure from bottom to top, and the left and right sides of the middle section of said second water-jet nozzle body face each other. a first guide injection hole and a second guide injection hole are provided at a position, and the hole diameter of the second guide injection hole is larger than that of the first guide injection hole;
The tilting auxiliary unit comprises a first flexible water conduit, and the first flexible water conduit is internally provided with a first nozzle connection section, a second water conveyance section and a second elastic drill pipe connection section in order from top to bottom, A first flexible water conduit is screwed into said second water jet nozzle body through a first nozzle connection section, and screwed into said elastic drill pipe through a second elastic drill pipe connection section, said second water jet The nozzle body communicates with the elastic drill pipe through the first flexible water conduit, the hole diameter of the second guide injection hole is larger than that of the first guide injection hole, and when the water jet drills, the second water jet nozzle body moves toward the side. generating a force F acting on the first flexible conduit, thereby achieving directivity of the drilling implement;
The pushing unit is a rod-type pushing unit, comprising a sealing pushing rod and a boring machine, the sealing pushing rod is screwed into a plurality of connected elastic drill pipes, and a high-pressure sealing pushing rod is clamped and controlled by the boring machine. 2. The hydraulic tilting directional drilling rig according to claim 1, which is connected to a high pressure water injection pump through a high pressure rubber pipe. The water jet nozzle comprises a fifth water jet nozzle body, the fifth water jet nozzle body has a vertical structure from the bottom to the head, the fifth water jet nozzle body is screwed into the elastic drill pipe,
Said tilting auxiliary unit comprises a wire fixing ring, a wire and a wire pulling winch, the wire is fixedly connected to the front end holding part of the elastic drill pipe through the wire fixing ring, and the rear end of the wire is wound around the wire pulling winch. The wire pulling winch is fixed outside the borehole, and by pulling the wire, the elastic drill pipe is controlled to produce deflection, causing the water jet nozzle to produce a drilling deviation angle,
The pushing unit is a rod-type pushing unit, comprising a sealing pushing rod and a boring machine, the sealing pushing rod is screwed into a plurality of connected elastic drill pipes, and a high-pressure sealing pushing rod is clamped and controlled by the boring machine. 2. The hydraulic tilting directional drilling rig according to claim 1, which is connected to a high pressure water injection pump through a high pressure rubber pipe. the water jet nozzle comprises a sixth water jet nozzle body, the sixth water jet nozzle body having a vertical structure from the bottom to the head;
The auxiliary tilting unit comprises an auxiliary tilting body, an injection window, a guide ramp and a general pushing rod, the sixth water jet nozzle body is screwed into the elastic drill pipe, and the auxiliary tilting body is tubular in its entirety. a side wall of the auxiliary tilting body is provided with an injection window for the sixth water jet nozzle body to extend; It is welded to the upper edge of the body, the other end is welded to the inner wall of the auxiliary tilting body, the axial included angle with the auxiliary tilting body is γ, and the bottom end of the auxiliary tilting body is a plurality of whole The pushing rod is screwed together, the whole pushing rod is generally tubular, the auxiliary tilting auxiliary unit is disposed in the borehole, provides a guide ramp for the sixth water jet nozzle body and the elastic drill pipe, and has a plurality of The elastic drill pipe drives the sixth water jet nozzle body to push it to the guide slope, then bends, and is ejected from the injection window along the guide slope for drilling,
The pushing unit is a rod-type pushing unit, which includes a sealing pushing rod and a boring machine, the sealing pushing rod is screwed into a plurality of elastic drill pipes, the high pressure sealing pushing rod is clamped and controlled by the boring machine, and a high pressure rubber pipe. 2. A hydraulic tilting and directional drilling rig according to claim 1, connected to a high pressure water injection pump via. the water jet nozzle comprises a seventh water jet nozzle body, the seventh water jet nozzle body having a vertical structure from the bottom to the head;
The auxiliary tilting unit comprises an auxiliary tilting body, an injection window, a guide ramp and a general pushing rod, the seventh water jet nozzle body is screwed into the elastic drill pipe, and the auxiliary tilting body is tubular in its entirety. a side wall of the auxiliary tilting body is provided with an injection window for the seventh water jet nozzle body to extend; It is welded to the upper edge of the body, the other end is welded to the inner wall of the auxiliary tilting body, the axial included angle with the auxiliary tilting body is γ, and the bottom end of the auxiliary tilting body is a plurality of whole threadedly engaged with a pusher rod, said overall pusher rod being generally tubular;
said pushing unit is a hydraulic pushing unit, comprising a second piston, a piston rod, a piston rod water conducting eyelet, a wire rope, a sealed bearing, a rubber seal ring, a liquid injection joint, a wire rope winch, a limiting ramp and a bearing; A piston is attached to the piston rod, one end of the piston rod is connected to and screwed to an elastic drill pipe, and the other end is connected to a wire rope through a bearing so as to be relatively rotatable. A rod water-conducting eyelet is opened and the second piston is sealingly slidable along the overall push-on rod, the inner wall of the auxiliary ramping body, and restricts the second piston to the inner wall of the mouth of the auxiliary ramping body. The limiting bevel which has the function of preventing leakage is fixed by welding, and the liquid injection joint has one end connected and screwed to the overall push-in rod, and the other end screwed to the sealing bearing, and the sealing bearing is provided with a rubber seal ring inside. Hydraulic tilting directional excavation according to claim 1, characterized in that the wire rope passes through the inner bore of the rubber seal ring and sealingly slides along the sealed bearing and is fixed and hauled by the wire rope winch. Device. A drilling method for a hydraulic tilting directional drilling rig realized by using the hydraulic tilting directional drilling rig according to any one of claims 1 to 6, specifically comprising:
step 1, after drilling to the interior of the coal seam, using a pushing unit, an elastic drill pipe, to feed a water jet nozzle of a hydraulic tilting directional drilling tool to a designed tilting drilling position in the borehole;
Connect the rod-type pushing unit or hydraulic propulsion unit with the high-pressure water injection pump through the high-pressure rubber pipe, turn on the high-pressure water injection pump, and the high-pressure water will flow through the elastic drill pipe into the water jet of the hydraulic tilting directional drilling equipment. Step 2 of flowing to a nozzle to perform hydraulically tilted directional crushing to generate directional hydraulic injection holes whose centerline direction is different from the centerline of the borehole;
The pushing unit is used to continue pushing, the elastic drill pipe is bent under force, and the hydraulic tilting directional drilling instrument is driven to gradually directional drilling along the directional hydraulic jet hole, and the hydraulic tilting directional Step 3 of forming a borehole;
step 4 of drawing the elastic drill pipe and the hydraulically inclined directional drilling tool into the borehole using a pushing unit;
Utilizing the pushing unit to drive the elastic drill pipe, hydraulic tilting directional drilling tool to rotate or move to another designed directional jet drilling direction, and repeat steps 3-4 for multi-cluster hydraulic tilting orientation. and step 5 of completing jet drilling.

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