WO2022161055A1

WO2022161055A1 - Coal mine underground wire-buried rotary guide drilling tool combination and industrial control method

Info

Publication number: WO2022161055A1
Application number: PCT/CN2021/140951
Authority: WO
Inventors: 李泉新; 曹明; 杨冬冬; 陈龙; 褚志伟; 陈刚
Original assignee: 中煤科工集团西安研究院有限公司
Priority date: 2021-01-29
Filing date: 2021-12-23
Publication date: 2022-08-04
Also published as: AU2021423999B2; CN112878913A; AU2021423999A1; CN112878913B

Abstract

A coal mine underground wire-buried rotary guide drilling tool combination and an industrial control method. The drilling tool combination comprises a wire-buried water feeder (1), a wire-buried drilling rod (2), an adapter (3), a measurement joint (4), a launch control joint (5), a rotary guide drilling tool (6), and a drilling bit (7) that are sequentially and coaxially connected; a control center (9) is communicated with insulating wires buried in the wire-buried water feeder (1) and the wire-buried drilling rod (2); the insulating wires are gathered into a bundle in the adapter and then connected to a measurement probe tube (402) in the measurement joint (4); the measurement probe tube (402) is connected to the launch control joint (5); the launch control joint (5) is communicated with a control unit in the rotary guide drilling tool (6) by means of an insulating wire; and the control center (9) sends an instruction, the measurement joint (4) returns the attitude information of the drilling tool in a hole, and a pushing palm (604) on the rotary guide drilling tool (6) pushes against a well wall with different push forces according to the instruction, thereby achieving continuous three-dimensional guidance. The drilling tool combination and the industrial control method can achieve power supply and signal transmission at the bottom of the hole, improve the data volume and stability of signal transmission, enhance the overall strength of the drilling rod, reduce pressure on-way loss in long drilling construction, improve stratum adaptability and directional drilling efficiency, and ensure the smoothness of a directional drilling track.

Description

A kind of underground coal mine buried line rotary steerable drilling tool assembly and industrial control method

technical field

The invention belongs to the technical field of drilling equipment, and in particular relates to a rotary steerable drilling tool assembly and an industrial control method for underground buried lines in coal mines.

Background technique

Underground tunnel drilling in coal mines is one of the most direct and effective means for mine disaster prevention and coalbed methane development and utilization. MWD technology is currently the most advanced drilling construction method in coal mines. In coal mines, gas drainage, water hazard prevention and control , concealment to disaster factor exploration and many other fields are more and more widely used. The currently used MWD directional drilling tool combination mainly has the following two forms: one is the combination of the screw motor connected to the wired MWD system and the center cable drill pipe; the second is the screw motor connected to the wireless tracking system such as mud pulse or electromagnetic wave The drill measuring system is combined with the conventional drill pipe. The above-mentioned drilling tool assembly faces the following main problems in the construction of long-distance coal seam pressure relief gas drilling, roof high-level drilling and water exploration and drainage drilling: First, the output power of conventional screw motor sliding drilling is limited, and hard rock drilling The feeding efficiency is low, and the drilling trajectory is not smooth; second, the pressure loss of the center cable drill pipe is large during the application of the pressure in the long drilling hole, and the center cable drill pipe causes the outer wall thickness of the drill pipe to obtain sufficient flow area. Thirdly, with the increase of drilling depth, the directional control of the existing technical equipment is difficult, and the drilling trajectory cannot be effectively controlled; Fourthly, the use of mud pulse and electromagnetic wave wireless measurement while drilling system The formation interference is large, the data transmission efficiency is low, and the auxiliary time is long. Fifth, the formation adaptability is poor. Most of the mining areas in my country have complex coal-rock geological conditions. The existing MWD technology and equipment can drill into complex broken formations Poor adaptability, frequent accidents in the hole.

At present, the rotary steering system has been successfully promoted and used in the petroleum industry. It has the ability of continuous three-dimensional steering and increasing the extension length, which can effectively increase the drilling speed, shorten the well construction period, and the drilling trajectory after construction is smooth. The outer diameter of the rotary steerable drilling tool is large and cannot meet the requirements for use in coal mines, so it cannot be directly used in coal mines. Therefore, it is necessary to design a rotary steerable drilling tool with small size, simple structure and high reliability according to the actual working conditions in coal mines. cable drill pipe.

SUMMARY OF THE INVENTION

Aiming at the defects and deficiencies in the prior art, the present invention provides an underground buried line rotary steerable drilling tool assembly and an industrial control method in order to solve the problem of low drilling efficiency, low drilling efficiency and low drilling efficiency of the MWD directional drilling tool assembly in the prior art. The trajectory is not smooth and so on.

To achieve the above object, the present invention adopts the following technical scheme:

The utility model relates to a rotary steerable drilling tool assembly for underground buried lines in a coal mine, comprising a buried line water feeder, a buried line drill pipe, a conversion joint, a measurement short circuit, a transmission control short circuit, a rotary steerable drilling tool and a drill bit which are coaxially connected in sequence;

The buried water feeder includes a mandrel, and a plurality of insulated wires V are embedded in the side wall of the mandrel; the buried drill pipe includes an outer pipe III, and a plurality of insulated wires IV are embedded in the pipe wall of the outer pipe III. And the insulated wire IV is connected to the insulated wire V; the conversion joint includes an outer tube II and an inner tube located in the outer tube II, and a plurality of insulated wires III are embedded in the wall of the outer tube II, and a plurality of insulated wires One end of III is connected to the insulated wire IV, and the other ends of the plurality of insulated wires III are assembled into a bundle in the inner tube and connected to the cable joint at the end of the inner tube; the measurement short connection includes the measurement outer tube and the measurement located in the outer measurement tube. The probe tube, and the measurement probe tube is connected to the cable joint; the transmission and control short-circuit includes an outer tube I, an inverter electronic section and a turbine generator located in the outer tube and connected in series in sequence, and a communication is provided at the end of the turbine generator. The interface, the communication interface is connected to the measuring probe pipe, and an insulated wire II is embedded in the pipe wall of the outer pipe I, and the insulated wire II is connected to the inverter electronic section; The outer casing, a plurality of push slaps embedded on the outer wall of the outer casing and distributed evenly along the circumference of the outer casing, a hydraulic cylinder arranged in the outer casing pipe wall and correspondingly communicated with the push slaps, the electronic section connecting the hydraulic cylinder and the connecting electronic The rotary transformer of the section; the insulated wire I is embedded in the side wall of the central shaft, and the two ends of the insulated wire I are respectively connected to the rotary transformer and the insulated wire II;

The insulated wire Ⅴ is connected to the control center through the insulated wire ⅤI, and the control center can send the rotation guidance control command, and then the insulated wire ⅤI, the insulated wire V, the insulated wire Ⅳ, the insulated wire Ⅲ and the cable joint reach the measuring probe and the transmitter. Control short-circuit, measurement short-circuit can measure the current attitude value of the rotary steerable drilling tool and return to the control center, send control short-circuit to transmit the control command to the rotary steerable drilling tool through the insulated wire II and the insulated wire I to adjust the hydraulic pressure according to the control command The action of the oil cylinder completes the pushing action of pushing against the slap; the electronic section in the rotary steerable drilling tool supplies power to the hydraulic oil cylinder and adjusts the hydraulic thrust according to the control command, so that the pushing slap pushes against the well wall with different thrusts to achieve steerable drilling. track control.

The present invention also includes the following technical features:

Specifically, the buried water feeder further includes a guide ring IV arranged on the annular boss of the outer wall of one end of the mandrel, a guide ring V arranged on the annular boss of the outer wall of the other end of the mandrel, and a plurality of guide rings arranged on the wall of the mandrel A plurality of the insulated wires V in the axial wire hole, and the two ends of the insulated wires V are respectively connected to the guide ring IV and the guide ring V, and the outer casing is sleeved on the outside of the mandrel through the bearing, and the casing is located outside the mandrel close to the guide ring V And the upper end cover arranged at the end of the mandrel and the casing, and the upper end cover is provided with a guide ring VI corresponding to the guide ring V and not in contact with the guide ring VI, and is connected with an insulated wire VI that can extend out of the upper end cover on the guide ring VI; the described An annular groove is arranged on the guide ring VI, a plurality of hemispherical grooves are arranged on the guide ring V, and a metal ball sandwiched between the guide ring V and the guide ring VI is arranged in the hemispherical groove; There is a circular groove, a spring II is arranged in the circular groove and the spring II can freely expand and contract axially, a contact II is inserted into the spring II and the contact II can expand and contract with the spring II; the mandrel can be relative to the shell and The upper end cap turns.

Specifically, insulating fixing glue III is filled between the insulated wire V and the inner wall of the axial wire hole, the guide ring IV is located in the guide ring groove on the annular boss on the outer wall of one end of the mandrel, and between the guide ring IV and the guide ring The guide ring glue IV is filled between the grooves, the guide ring V is located in the guide ring groove on the annular boss on the outer wall of the other end of the mandrel, and the guide ring glue V is filled between the guide ring V and the guide ring groove; the guide ring VI is located in the guide ring groove. A guide ring glue VI is filled in the guide ring groove at the end of the upper end cover and between the guide ring VI and the guide ring groove.

Specifically, a guide ring II is provided on the annular boss on the inner wall of one end of the outer tube III of the buried drill pipe, the annular boss on the outer wall of the other end of the outer tube III is provided with a guide ring III, and a plurality of the insulated wires IV are provided on the outside A plurality of axial wire holes in the tube wall of the tube III and the two ends of the insulated wire IV are respectively connected to the guide ring II and the guide ring III; the guide ring III is provided with a circular groove, and the circular groove is provided with a spring I and The spring I can freely expand and contract in the axial direction, and the contact point I is inserted into the spring I and the contact point I can expand and contract with the spring I; on.

Specifically, insulating fixing glue II is filled between the insulated wire IV and the inner wall of the axial wire hole, the guide ring II is located in the guide ring groove on the annular boss on the inner wall of one end of the outer tube III, and between the guide ring II and the guide ring The grooves are filled with guide ring glue II, the guide ring II is provided with an annular groove, the guide ring III is located in the guide ring groove on the annular boss on the outer wall of the other end of the outer tube III, and is filled between the guide ring III and the guide ring groove There is guide ring glue III.

Specifically, a guide ring I is provided on the annular boss on the inner wall of the outer tube II of the conversion joint, and a plurality of axial wire passages are arranged in the side wall of the outer tube II, and the wire passages are communicated with the guide ring I. A plurality of radial passages are connected between the tube II and the inner tube, and the radial passages correspond to the wire passages one-to-one and communicate with each other; the plurality of insulated wires III in the wire passages extend to the inside through the radial passages After the pipes are assembled into a bundle, they are connected to the cable joint at the end of the inner pipe; the insulated wire III is communicated with the guide ring I; after the conversion joint is connected with the buried drill pipe, the contact point I and the guide ring I are in contact and conduct.

Specifically, a guide ring glue I is provided between the guide ring I and the outer tube II, and an insulating fixing glue I is provided between the insulated wire III and the inner wall of the wire passage and between the insulated wire III and the inner wall of the radial passage; The ring I is arranged in the guide ring groove on the annular boss of the outer pipe II, the guide ring I is provided with an annular groove, and the guide ring glue I is filled between the guide ring I and the guide ring groove of the outer pipe II, and the inner pipe It is limited and fixed in the outer tube II by the fixing ring.

Specifically, the transmission-control short-circuit connection also includes a slip ring II arranged on the annular boss on the outer wall of the outer tube I, and the output end of the inverter electronic section is led to the slip ring II through the insulated wire II; the slip ring II is connected to the Insulation treatment is performed between the outer tubes I.

Specifically, in the rotary steerable drilling tool, the rotary transformer includes an annular rotary transformer secondary side connected to the electronic section and an annular rotary transformer primary side disposed on the outer wall of the central shaft and opposite to the rotary transformer secondary side; the rotary steerable The drilling tool also includes drill bit joints respectively arranged at both ends of the central shaft, a slip ring I that can be in contact with the slip ring II, and an insulated wire I arranged in the side wall of the central shaft and connected to the primary side of the resolver and the slip ring I; each The hydraulic oil cylinder is correspondingly connected to a push-back palm, and each electronic section is correspondingly connected to a hydraulic oil cylinder; The bearing is respectively fixed on both ends of the outer sleeve through the lower bearing sleeve and the upper bearing sleeve, and the central shaft can rotate freely in the outer sleeve.

An industrial control method for a rotary steerable drilling tool assembly for underground buried lines in a coal mine, the method comprising:

Control signal transmission steps: the control center sends a rotary steering control command, and the control command is transmitted to the adapter in the form of carrier wave through the insulated wire V in the buried water feeder and the insulated wire Ⅳ in the buried drill pipe, and the insulated wire Ⅲ in the adapter Collected into a bundle to continue to transmit commands to the measuring probe pipe inside the short-circuit and the rotary steerable drilling tool at the front end; the measuring probe tube can measure the attitude value of the current rotating steerable drilling tool and return to the control center in the form of a carrier wave, and the rotating steerable drilling tool The action of the hydraulic cylinder can be regulated according to the control command, and the pushing action of pushing against the palm can be completed;

Steps of in-hole power supply: The mud pump injects drilling fluid into the drilling tool assembly, and the drilling fluid flowing from the orifice impacts the turbine rotor to drive the turbine generator to work to generate AC voltage. The inverter electronic section rectifies and stabilizes the AC voltage. The power and control commands are transmitted to the primary side of the resolver through the inverter electronic section, and the secondary side of the resolver receives the power and control commands from the primary side of the resolver through non-contact magnetic coupling. Rectification and voltage stabilization, the electronic section supplies power to the hydraulic cylinder and adjusts the hydraulic thrust according to the control command, so that the pusher slap pushes against the well wall with different thrusts, and realizes the trajectory control of steerable drilling.

Compared with the prior art, the present invention has the following beneficial technical effects:

①Using the buried line rotary steerable drilling tool assembly can effectively solve the problems of low hard rock drilling efficiency, uneven drilling trajectory, unstable signal transmission, and small amount of signal data in the long-distance drilling construction of existing technical equipment in coal mines. , has the beneficial effects of continuous three-dimensional steering, smooth drilling trajectory, shortening the well construction period, etc.; ② the buried wire drill pipe adopts the side wall buried wire instead of the original central cable drill pipe, which increases the flow area and also increases the drill pipe. The wall thickness improves the overall strength of the drill pipe and meets the requirements of long-distance drilling for flushing fluid flow and pressure, reduces the working load of the existing equipment, and effectively improves the depth and efficiency of directional drilling; ③ The overall structure of the system is simple, and the specifications and dimensions It meets the actual working conditions in coal mines, with few wearing parts and easy to replace, and the whole set of drilling tool assembly has a long service life; ④ This set of drilling tool assembly has strong stratum adaptability, and can adjust the drilling trajectory in real time through the feedback of the drilling tool attitude information , the auxiliary time is small, which can effectively reduce the friction torque. ⑤ The power supply and signal transmission at the bottom of the hole are realized through the buried drill pipe, which improves the data volume and stability of signal transmission, enhances the overall strength of the drill pipe, and effectively reduces the pressure loss along the way in the construction of long drilling holes. Steering drilling tools can effectively improve formation adaptability and directional drilling efficiency, and ensure smooth directional drilling trajectory.

Description of drawings

Fig. 1 is the overall schematic diagram of the present invention;

Figure 2 is a sectional view of the buried water feeder;

FIG. 3 is a schematic diagram of the guide ring V. FIG.

Figure 4 is a sectional view of a buried drill pipe;

Fig. 5 is the schematic diagram of guide ring II;

Fig. 6 is the schematic diagram of guide ring III;

FIG. 7 is a sectional view of the guide ring glue II.

8 is a cross-sectional view of the guide ring glue III.

Figure 9 is a partial view III of the buried drill pipe;

Figure 10 is a sectional view of the adapter;

Figure 11 is the front view of the sending control short circuit;

Figure 12 is a front view of a rotary steering drilling tool;

Figure 13 is A-A sectional view of rotary steerable drilling tool;

Figure 14 is a partial view II of the resolver;

The meaning of the reference symbols:

1. Buried water feeder, 2. Buried drill pipe, 3. Adapter, 4. Measurement short circuit, 5. Transmission control short circuit, 6. Rotary steering drilling tool, 7. Drill bit, 8. Insulated wire ⅤI, 9 .control center;

101. Mandrel, 102. Insulated wire V, 103. Guide ring IV, 104. Guide ring V, 105. Bearing II, 106. Housing, 107. Upper end cover, 108. Guide ring VI, 109. Metal ball, 110. Spring II, 111. Contact II;

201. Outer tube III, 202. Insulated wire IV, 203. Guide ring II, 204. Guide ring III, 205. Spring I, 206. Contact I;

301. Outer tube II, 302. Inner tube, 303. Insulated wire III, 304. Cable joint, 305. Guide ring I, 306. Fixing ring;

401. Measuring outer tube, 402. Measuring probe tube;

501. Outer tube I, 502. Inverter electronic section, 503. Turbine generator, 504. Communication interface, 505. Insulated wire II, 506. Slip ring II;

601. Center shaft, 602. Bearing, 603. Outer casing, 604. Push against the palm, 605. Hydraulic cylinder, 606. Electronic section, 607. Resolver, 608. Insulated conductor I, 609. Resolver secondary side, 610. Primary side of resolver, 611. Drill joint, 612. Slip ring I, 613. Lower bearing sleeve, 614. Upper bearing sleeve.

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Detailed ways

Following the above technical solutions, specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent transformations made on the basis of the technical solutions of the present application all fall into the protection scope of the present invention. . The present invention will be described in further detail below in conjunction with the embodiments.

Example 1:

As shown in Fig. 1 to Fig. 14 , this embodiment provides a rotary steerable drilling tool assembly for underground coal mines, including a buried water feeder 1, a buried drill pipe 2, a conversion joint 3, and a short measuring connection that are coaxially connected in sequence. 4. Short circuit of hair control 5. Rotary steering drilling tool 6 and drill bit 7.

The buried water feeder 1 includes a mandrel 101, and a plurality of insulated wires V102 are embedded in the side wall of the mandrel 101; the buried drill pipe 2 includes an outer pipe III201, and a plurality of insulated wires are embedded in the pipe wall of the outer pipe III201. Ⅳ202, and the insulated wire Ⅳ202 is connected to the insulated wire Ⅴ102; the adapter 3 includes an outer tube II301 and an inner tube 302 located in the outer tube II301, and a plurality of insulated wires III303 are embedded in the wall of the outer tube II301, and a plurality of insulated wires One end of III303 is connected to the insulated wire IV202, and the other end of the multiple insulated wires III303 is assembled into a bundle in the inner tube 302 and connected to the cable joint 304 at the end of the inner tube 302; the measurement short 4 includes the outer measurement tube 401 and the outer measurement tube 401. The measuring probe tube 402 inside, and the measuring probe tube 402 is connected to the cable joint 304; The end of the generator 503 is provided with a communication interface 504, the communication interface 504 is connected to the measuring probe 402, an insulated wire II 505 is embedded in the pipe wall of the outer pipe I501, and the insulated wire II 505 is connected to the inverter electronic section 502; the rotary steerable drilling tool 6 includes a center The shaft 601, the outer sleeve 603 sleeved on the outside of the central shaft 601 through the bearing 602, a plurality of push palms 604 embedded on the outer wall of the outer sleeve 603 and distributed evenly along the circumference of the outer sleeve 603, arranged in the wall of the outer sleeve 603 and connected to the pusher. The hydraulic oil cylinder 605 connected by the palm 604, the electronic section 606 connected to the hydraulic oil cylinder 605 and the rotary transformer 607 connected to the electronic section 606 are correspondingly connected; an insulated wire I608 is embedded in the side wall of the central shaft 601, and both ends of the insulated wire I608 are connected to rotate respectively Transformer 607 and insulated wire II 505; more specifically, the mandrel 101 of the buried water feeder 1 is connected to one end of the outer pipe III 201 of the buried drill pipe 2, and the other end of the outer pipe III 201 of the buried drill pipe 2 is connected to the outer pipe of the adapter 3 One end of II301, the other end of the outer tube II301 of the adapter 3 is connected to one end of the measurement outer tube 401 of the measurement short circuit 4, and the other end of the measurement outer tube 401 of the measurement short circuit 4 is connected to one end of the outer tube I501 of the transmitter control short circuit 5, the transmitter control short circuit The other end of the outer pipe I501 connected to 5 is connected to the central shaft 601 of the rotary steering drilling tool 6 , and the drill bit joint of the rotary steering drilling tool 6 is connected to the drill bit 7 .

The insulated wire Ⅴ102 is connected to the control center 9 through the insulated wire ⅤI8, and the control center 9 can send a rotation guide control command, and then the insulated wire ⅤI8, insulated wire Ⅴ102, insulated wire Ⅳ202, insulated wire Ⅲ303 and cable joint 304 reach the measuring probe 402 in turn. Short connection 5 with transmission control, measurement short connection 4 can measure the attitude value of the current rotary steerable drilling tool 6 and return to the control center 9, transmission control short connection 3 transmits the control command to the rotary steerable drill through insulated wire II505 and insulated wire I608 The tool 6 is used to control the action of the hydraulic cylinder 605 according to the control command to complete the pushing action of the slap 604; the electronic section 606 in the rotary steerable drilling tool 6 supplies power to the hydraulic cylinder 605 according to the control command and adjusts the size of the hydraulic thrust, so that the slap is pushed against the slap. 604 pushes against the well wall with different thrusts to achieve trajectory control of steerable drilling.

The buried water feeder 1 also includes a guide ring IV103 arranged on the annular boss of the outer wall of one end of the mandrel 101, a guide ring V104 arranged on the annular boss of the outer wall of the other end of the mandrel 101, and a plurality of shafts arranged in the wall of the mandrel 101. A plurality of insulated wires V102 in the wire hole and the two ends of the insulated wires V102 are respectively connected to the guide ring IV103 and the guide ring V104, and the casing 106 is sheathed outside the mandrel 101 through the bearing II 105, and the casing 106 is located close to the guide ring V104 The mandrel The outer side of 101 and the upper end cover 107 provided at the end of the mandrel 101 and the outer casing 106, and the upper end cover 107 is provided with a guide ring VI108 corresponding to the guide ring V104 and not in contact with the guide ring VI108. The insulated wire VI8; the guide ring VI108 is provided with an annular groove, the guide ring V104 is provided with a plurality of hemispherical grooves (in this embodiment, there are 8 hemispherical grooves), and in the hemispherical groove there are clamped The metal ball 109 between the guide ring V104 and the guide ring VI108; the guide ring IV103 is provided with a circular groove, the circular groove is provided with a spring II110 and the spring II110 can freely expand and contract axially, and a contact is inserted into the spring II110 II111 and the contact II111 can expand and contract with the spring II110; the mandrel 101 can rotate relative to the casing 106 and the upper end cover 107, and in the actual working process, the guide ring V104 rotates with the mandrel 101, the guide ring VI108 does not rotate, and the metal ball 109 rotates in the hemispherical groove to realize the conduction between the guide ring V104 and the guide ring VI108.

In the above structure of the buried water feeder 1, the insulating fixing glue III is filled between the insulated wire V102 and the inner wall of the axial wire hole, and the guide ring IV103 is located in the guide ring groove on the annular boss on the outer wall of one end of the mandrel 101 and is in the guide ring. The guide ring glue IV is filled between the IV103 and the guide ring groove, the guide ring V104 is located in the guide ring groove on the annular boss on the outer wall of the other end of the mandrel 101, and the guide ring glue V is filled between the guide ring V104 and the guide ring groove ; The guide ring VI108 is located in the guide ring groove at the end of the upper end cover 107 and is filled with guide ring glue VI between the guide ring VI108 and the guide ring groove.

One end of the outer tube III201 of the buried drill pipe 2 is provided with a guide ring II203 on the inner wall annular boss, the other end of the outer tube III201 is provided with a guide ring III204 on the annular boss of the outer wall, and a plurality of insulated wires IV202 are arranged on the inner wall of the outer tube III201. A plurality of axial wire holes and the two ends of the insulated wire IV202 are respectively connected to the guide ring II203 and the guide ring III204; the guide ring III204 is provided with a circular groove, and the circular groove is provided with a spring I205 and the spring I205 can be freely stretched in the axial direction, The contact I206 is inserted into the spring I205 and the contact I206 can expand and contract with the spring I205; after the buried drill pipe 2 is connected to the buried water feeder 1, the contact II111 and the guide ring II203 are in contact and conduct, and the guide ring IV103 and the guide ring Ring II111 does not touch. In this embodiment, the outer tube III 201 is provided with four axial wire holes in the circumferential direction, and the four insulated wires IV in the axial wire holes can transmit signals without interfering with each other. If there is a problem with one of the insulated wires during the working process, Does not affect signal transmission.

In the above structure of the buried drill pipe 2, the insulating fixing glue II is filled between the insulated wire IV202 and the inner wall of the axial wire hole, which plays the role of fixing and secondary insulation, and the guide ring II203 is located on one end of the outer tube III201. The annular boss on the inner wall The guide ring groove is filled with guide ring glue II between the guide ring II203 and the guide ring groove, the guide ring II203 is provided with an annular groove, and the guide ring III204 is located in the guide ring groove on the annular boss on the outer wall of the other end of the outer tube III201 The guide ring glue III is filled inside and between the guide ring III204 and the guide ring groove.

A guide ring I305 is provided on the annular boss on the inner wall of the outer tube II301 of the adapter 3, and a plurality of axial passages are arranged in the side wall of the outer tube II301 and the wire passages are communicated with the guide ring I305. A plurality of radial passages are connected between the pipes 302, and the radial passages and the wire passages are in one-to-one correspondence and communicate with each other; a plurality of insulated wires III303 in the wire passages extend through the radial passages to the inner pipes after they are assembled into a bundle and then connected inside. The cable joint 304 at the end of the pipe 302; the insulated wire III303 communicates with the guide ring I305; after the conversion joint 3 is connected with the buried drill pipe 2, the contact I206 is in contact with the guide ring I305, and the guide ring III204 is not connected with the guide ring I305. touch.

In the above-mentioned structure of the adapter 3, the guide ring glue I is provided between the guide ring I305 and the outer tube II301, and the insulating fixing glue I is provided between the insulated wire III303 and the inner wall of the wire passage and between the insulated wire III303 and the inner wall of the radial passage; The guide ring I305 is arranged in the guide ring groove on the annular boss of the outer tube II301, the guide ring I305 is provided with an annular groove, and the guide ring glue I is filled between the guide ring I305 and the guide ring groove of the outer tube II301, and the inner tube 302 It is limited and fixed in the outer tube II 301 by the fixing ring 306 .

The transmission control short-circuit 5 also includes a slip ring II506 arranged on the annular boss on the outer wall of the outer tube I501. The output end of the inverter electronic section 502 is led to the slip ring II506 through the insulated wire II505; insulation treatment is performed between the slip ring II506 and the outer tube I501 .

In the rotary steerable drilling tool 6, the resolver 607 includes an annular resolver secondary side 609 connected to the electronic section 606 and an annular resolver primary side 610 located on the outer wall of the central shaft 601 and opposite to the resolver secondary side 609; The drilling tool 6 also includes drill bit joints 611 respectively arranged at both ends of the central shaft 601, a slip ring I 612 which can be in contact with the slip ring II 506, and an insulation which is arranged in the side wall of the central shaft 601 and communicates with the primary side 610 of the resolver and the slip ring I 612. Wire I608, the drill bit joint 611 is threadedly connected to the central shaft 601; each hydraulic cylinder 605 is connected to a push-back palm 604, and each electronic section 606 is connected to a hydraulic cylinder 605; the slip ring I612 is insulated from the central shaft 601, and the outer casing is A plurality of bearings 602 are arranged between the tube 603 and the central shaft 601 . The plurality of bearings 602 are respectively fixed to both ends of the outer sleeve 603 through the lower bearing sleeve 613 and the upper bearing sleeve 614 , and the central shaft 601 can rotate freely in the outer sleeve 603 . Specifically, in this embodiment, four sets of bearings 602 are arranged between the outer sleeve 603 and the central shaft 601 , two sets of bearings 602 are arranged at one end of the outer sleeve 603 , and the other two sets of bearings 602 are arranged at the other end of the outer sleeve 603 . Specifically, the lower bearing sleeve 613 and the upper bearing sleeve 614 respectively fix the two sets of bearings 602 on both ends of the outer sleeve 603 by means of screw connection.

In this embodiment, the push-back palm includes radially telescopic outriggers, the lower part of the outrigger is provided with an oil bag, an oil circuit exists between the oil bag and the hydraulic cylinder, and the electronic section adjusts the supply of the hydraulic cylinder to the oil bag according to the control signal. The amount of oil, thereby controlling the radial expansion and contraction of the outriggers. In actual work, the three pushers push against the well wall with different thrusts according to the instructions, so as to realize continuous three-dimensional steerable drilling.

In this embodiment, the guide ring I, the guide ring II, and the guide ring VI have the same structure and size, and the end faces are all provided with an annular groove, and the outline of the annular groove is the same as that of the contact head; It is matched with the annular grooves on the end faces of the guide ring I and the guide ring II and can slide relatively freely. The contact I contacts the annular groove on the end face of the guide ring II. As the thread is gradually tightened, the guide ring II squeezes the contact I and compresses the spring I to the bottom dead center. At this time, there is a certain gap between the guide ring II and the guide ring III. , to prevent frequent loading and unloading of the drill pipe to wear the guide ring, the contact point I, the contact II and the guide ring are in point contact, and the above contacts are easy to replace after failure.

The guide ring glue I, guide ring glue II, guide ring glue III, guide ring glue IV, guide ring glue V, and guide ring glue VI in this embodiment are all annular structures after molding, and wrap the corresponding guide rings, such as As shown in Figure 7 and Figure 8, the guide ring glue I, guide ring glue II, and guide ring glue VI wrap the outer ring of the guide ring slightly higher than the inner ring by a certain height, and guide ring glue III, guide ring glue IV, and guide ring glue V wrap The inner ring of the guide ring is slightly higher than the outer ring by a certain height. The guide ring glue of two different structures is in a mutual cooperation relationship after being molded, which can wrap the guide ring, contacts and other connecting ports to play the role of sealing and isolation. The guide ring glue adopts a flexible material with certain elasticity and wear resistance. , soft rubber can be used here.

Example 2:

The present embodiment provides an industrial control method for a buried line rotary steerable drilling tool assembly in a coal mine, the method comprising:

Control signal transmission steps: the control center (that is, the orifice computer) sends a rotary steering control command, and the control command is transmitted to the conversion joint in the form of a carrier wave through the insulated wire V in the buried water feeder and the insulated wire Ⅳ in the buried drill pipe. The insulated wire III in the joint is collected into a bundle to continue to transmit commands to the measuring probe inside the short-circuit and the rotary steerable drilling tool at the front; the measuring probe can measure the current attitude value of the rotary steerable drilling tool and return to the control in the form of carrier wave In the center, the rotary steerable drilling tool can adjust the action of the hydraulic cylinder according to the control command to complete the pushing action of pushing against the palm;

Claims

A rotary steerable drilling tool assembly for underground buried lines in a coal mine, which is characterized in that it comprises a buried line water feeder (1), a buried line drill pipe (2), a conversion joint (3), and a measuring short connection (4) that are coaxially connected in sequence. , hair control short circuit (5), rotary steerable drilling tool (6) and drill bit (7);

The buried water feeder (1) includes a mandrel (101), and a plurality of insulated wires V (102) are embedded in the side wall of the mandrel (101); the buried drill pipe (2) includes an outer pipe III ( 201), a plurality of insulated conductors IV (202) are embedded in the pipe wall of the outer pipe III (201), and the insulated conductors IV (202) are connected to the insulated conductors V (102); the conversion joint (3) includes an outer Pipe II (301) and the inner pipe (302) located in the outer pipe II (301), and a plurality of insulated conductors III (303) are embedded in the pipe wall of the outer pipe II (301), and a plurality of insulated conductors III ( 303) One end is connected to the insulated wire IV (202), and the other ends of the plurality of insulated wires III (303) are assembled into a bundle in the inner tube (302) and connected to the cable joint (304) at the end of the inner tube (302); The measurement short connection (4) comprises a measurement outer pipe (401) and a measurement probe pipe (402) located in the measurement outer pipe (401), and the measurement probe pipe (402) is connected to the through-cable joint (304); The hair-control short-circuit (5) includes an outer tube I (501), an inverter electronic section (502) and a turbine generator (503) that are located in the outer tube I (501) and are connected in series in sequence, and are connected to the turbine generator (503). The end is provided with a communication interface (504), the communication interface (504) is connected to the measuring probe tube (402), and an insulated wire II (505) and an insulated wire II (505) are embedded in the tube wall of the outer tube I (501). Connect the inverter electronic section (502); the rotary steerable drilling tool (6) includes a central shaft (601), an outer casing (603) sleeved on the outside of the central shaft (601) through a bearing (602), and an outer casing (603) embedded in the outer casing ( 603) a plurality of push slaps (604) on the outer wall and uniformly distributed along the circumference of the outer sleeve (603), hydraulic cylinders (605) provided in the pipe wall of the outer sleeve (603) and in corresponding communication with the push slaps (604), An electronic section (606) connected to the hydraulic cylinder (605) and a resolver (607) connected to the electronic section (606); an insulated wire I (608) is embedded in the side wall of the central shaft (601), and the insulated wire I (608) ) are respectively connected to the resolver (607) and the insulated wire II (505) at both ends;

The insulated wire Ⅴ(102) is connected to the control center (9) through the insulated wire ⅤI(8), and the control center (9) can send a rotation guide control command, and the insulated wire ⅤI(8), the insulated wire Ⅴ(102) are sequentially connected to the control center (9). , insulated wire Ⅳ (202), insulated wire Ⅲ (303) and cable joint (304) reach the measuring probe (402) and the transmission control short circuit (5), the measuring short circuit (4) can measure the current rotary steering drilling tool The attitude value of (6) is returned to the control center (9), and the control short circuit (3) transmits the control command to the rotary steerable drilling tool (6) through the insulated wire II (505) and the insulated wire I (608). The control command regulates the action of the hydraulic oil cylinder (605) to complete the pushing action of the slap (604); the electronic section (606) in the rotary steerable drilling tool (6) supplies power to the hydraulic oil cylinder (605) and adjusts the hydraulic thrust according to the control command. size, so that the pusher slap (604) pushes against the well wall with different thrusts to realize trajectory control of steerable drilling.
The rotary steerable drilling tool assembly for underground coal mines according to claim 1, characterized in that, the buried water feeder (1) further comprises a guide ring IV ( 103), a guide ring V (104) arranged on the annular boss on the outer wall of the other end of the mandrel (101), a plurality of the insulated wires V arranged in a plurality of axial wire holes in the wall of the mandrel (101) (102) and the two ends of the insulated wire V (102) are respectively connected to the guide ring IV (103) and the guide ring V (104), and the outer casing (106) is sheathed on the outside of the mandrel (101) through the bearing II (105) and the outer casing ( 106) An upper end cover (107) located on the outer side of the mandrel (101) near the guide ring V (104) and provided at the end of the mandrel (101) and the outer casing (106), and the upper end cover (107) is provided with a guide ring. The guide ring VI (108) corresponding to and not in contact with V (104) is connected to the guide ring VI (108) with an insulated wire VI (8) that can extend out of the upper end cover (107); the guide ring VI (108) An annular groove is provided on the guide ring V (104), a plurality of hemispherical grooves are provided on the guide ring V (104), and a metal ball (109) sandwiched between the guide ring V (104) and the guide ring VI (108) is arranged in the hemispherical groove. ); a circular groove is provided in the guide ring IV (103), a spring II (110) is provided in the circular groove, and the spring II (110) can be freely expanded and retracted in the axial direction, and a spring II (110) is inserted into the spring II (110). Contact II (111) and the contact II (111) can be extended and retracted with the spring II (110); the mandrel (101) can rotate relative to the housing (106) and the upper end cover (107).
The rotary steerable drilling tool assembly for underground buried lines in a coal mine according to claim 2, characterized in that, insulating fixing glue III is filled between the insulated wire V (102) and the inner wall of the axial wire hole, and the guide ring IV ( 103) It is located in the guide ring groove on the annular boss on the outer wall of one end of the mandrel (101) and is filled with guide ring glue IV between the guide ring IV (103) and the guide ring groove, and the guide ring V (104) is located on the mandrel (103). 101) The guide ring groove on the annular boss on the outer wall of the other end is filled with guide ring glue V between the guide ring V (104) and the guide ring groove; the guide ring VI (108) is located at the end guide of the upper end cover (107). A guide ring glue VI is filled in the ring groove and between the guide ring VI (108) and the guide ring groove.
The rotary steerable drilling tool assembly for underground coal mines according to claim 2, characterized in that, a guide ring II (203) is provided on the annular boss at one end of the outer tube III (201) of the buried drill pipe (2). ), a guide ring III (204) is provided on the annular boss on the outer wall of the other end of the outer tube III (201), and a plurality of described insulated wires IV (202) are provided in the outer tube III (201) A plurality of axial wires in the tube wall Inside the hole and both ends of the insulated wire IV (202) are respectively connected to the guide ring II (203) and the guide ring III (204); the guide ring III (204) is provided with a circular groove, and the circular groove is provided with a spring I (205) and the spring I (205) can freely expand and contract in the axial direction, the contact I (206) is inserted into the spring I (205), and the contact I (206) can expand and contract with the spring I (205); After the wire drill pipe (2) is connected with the buried water feeder (1), the contact II (111) and the guide ring II (203) are in contact and conduct.
The rotary steerable drilling tool assembly for underground buried lines in a coal mine according to claim 4, characterized in that, insulating fixing glue II is filled between the insulated wire IV (202) and the inner wall of the axial wire hole, and the guide ring II (203) ) is located in the guide ring groove on the annular boss on the inner wall of one end of the outer tube III (201) and is filled with guide ring glue II between the guide ring II (203) and the guide ring groove, and the guide ring II (203) is provided with a ring The guide ring III (204) is located in the guide ring groove on the annular boss on the outer wall of the other end of the outer tube III (201) and the guide ring glue III is filled between the guide ring III (204) and the guide ring groove.
The underground coal mine buried line rotary steerable drilling tool assembly according to claim 4, characterized in that, a guide ring I (305) is provided on the inner wall annular boss of the outer pipe II (301) of the adapter (3), and a guide ring I (305) is provided on the outside The side wall of the tube II (301) is provided with a plurality of passages along the axial direction and the wire passages communicate with the guide ring I (305), and a plurality of diameters are connected between the outer tube II (301) and the inner tube (302). The direction channel and the radial channel correspond to the wire passages one-to-one and communicate with each other; a plurality of the insulated wires III (303) in the wire passages extend through the radial passages to the inner pipe and then converge into a bundle and then connect to the inner pipe (302) Cable joint (304) at the end; the insulated wire III (303) communicates with the guide ring I (305); after the adapter (3) is connected to the buried drill pipe (2), the contact The I (206) is in contact with the guide ring I (305) for conduction.
The underground coal mine buried line rotary steerable drilling tool assembly according to claim 6, wherein a guide ring glue I is provided between the guide ring I (305) and the outer pipe II (301), and the insulated wire III (303) ) and the inner wall of the wire passage and between the insulated wire III (303) and the inner wall of the radial channel are provided with insulating fixing glue I; the guide ring I (305) is arranged on the guide ring on the annular boss of the outer tube II (301). In the ring groove, the guide ring I (305) is provided with an annular groove, the guide ring glue I is filled between the guide ring I (305) and the guide ring groove of the outer tube II (301), and the inner tube (302) is fixed by The ring (306) is limited and fixed in the outer tube II (301).
The rotary steerable drilling tool assembly for underground buried lines in a coal mine according to claim 1, characterized in that, the hair-control short-circuit (5) further comprises a slip ring II (506) arranged on the annular boss on the outer wall of the outer pipe I (501). ), the output end of the inverter electronic section (502) is led to the slip ring II (506) through the insulated wire II (505); the slip ring II (506) and the outer tube I (501) are insulated deal with.
The underground coal mine buried line rotary steerable drilling tool assembly according to claim 8, characterized in that, in the rotary steerable drilling tool (6), the rotary transformer (607) comprises an annular rotary transformer connected to the electronic section (606) The secondary side (609) and the ring-shaped resolver primary side (610) arranged on the outer wall of the central shaft (601) and opposite to the resolver secondary side (609); The drill bit joints (611) at both ends of the shaft (601), the slip ring I (612) which can be in contact with the slip ring II (506), and the slip ring I (612) which are arranged in the side wall of the central shaft (601) and communicate with the primary side of the resolver (610) and the The insulated wire I (608) of the slip ring I (612); each hydraulic cylinder (605) is correspondingly connected to a pusher palm (604), and each electronic section (606) is correspondingly connected to a hydraulic cylinder (605); The slip ring I (612) is insulated from the central shaft (601), and a plurality of the bearings (602) are arranged between the outer sleeve (603) and the central shaft (601). ) are respectively fixed on both ends of the outer sleeve (603) through the lower bearing sleeve (613) and the upper bearing sleeve (614), and the central shaft (601) can rotate freely in the outer sleeve (603).
An industrial control method for a rotary steerable drilling tool assembly for underground buried lines in a coal mine, characterized in that the method comprises:

Control signal transmission steps: the control center sends a rotary steering control command, and the control command is transmitted to the adapter in the form of carrier wave through the insulated wire V in the buried water feeder and the insulated wire Ⅳ in the buried drill pipe, and the insulated wire Ⅲ in the adapter Collected into a bundle to continue to transmit commands to the measuring probe pipe inside the short-circuit and the rotary steerable drilling tool at the front end; the measuring probe tube can measure the attitude value of the current rotating steerable drilling tool and return to the control center in the form of a carrier wave, and the rotating steerable drilling tool The action of the hydraulic cylinder can be regulated according to the control command, and the pushing action of pushing against the palm can be completed;

Steps of in-hole power supply: The mud pump injects drilling fluid into the drilling tool assembly, and the drilling fluid flowing from the orifice impacts the turbine rotor to drive the turbine generator to work to generate AC voltage. The inverter electronic section rectifies and stabilizes the AC voltage. The power and control commands are transmitted to the primary side of the resolver through the inverter electronic section, and the secondary side of the resolver receives the power and control commands from the primary side of the resolver through non-contact magnetic coupling. Rectification and voltage stabilization, the electronic section supplies power to the hydraulic cylinder and adjusts the hydraulic thrust according to the control command, so that the pusher slap pushes against the well wall with different thrusts, and realizes the trajectory control of steerable drilling.