Explosion-proof static pushing type rotary guiding device for underground coal mine

Abstract

According to the coal mine underground anti-explosion static pushing type rotary guiding device, the anti-explosion structural design is adopted for components, the anti-explosion type of a rotary guiding system is an anti-explosion and intrinsic safety type, the interior of a cavity is communicated, an anti-explosion cavity is formed, only one port connected with the outside is arranged, and the coal mine underground anti-explosion safety design is met; in addition, the overall outer diameter of the underground coal mine explosion-proof static pushing type rotary guiding device does not exceed phi 140 mm, the requirement for slurry flow is small, the structure is easy to achieve, and the underground coal mine explosion-proof static pushing type rotary guiding device is suitable for underground coal mine nearly-horizontal directional drilling.

Description

Technical Field

[0001] The utility model belongs to the field of underground tunnel drilling in coal mines, and is particularly designed to be an explosion-proof static push-type rotary guide device for underground coal mines. Background Art

[0002] In the coal mining industry, when it comes to drilling long-distance coal seam roof high-position gas extraction holes and rock formation water exploration and drainage holes, the main problems faced are: First, the output power of the screw motor is limited during sliding directional drilling, and the hard rock drilling efficiency is extremely low; second, during compound drilling, the output power of the drill rig is limited, and the drilling efficiency deteriorates as the drilling distance increases; third, the difficulty of directional control increases with the increase of drilling distance, and the directional control efficiency decreases.

[0003] Rotary steerable systems (RSSs) have been successfully adopted in the oil industry, offering continuous three-dimensional guidance and extended reach, increasing drilling speeds and shortening well construction cycles. However, their large outer diameters prevent them from meeting explosion-proof requirements, and their design philosophy is primarily tailored to surface conditions within oil drilling sites. Compared to the oil industry, underground coal mine rotary steerable tools require low power consumption and higher explosion-proof requirements. Existing oil rotary steerable systems do not meet safety and explosion-proof requirements in underground coal mines and are therefore unsuitable for these conditions. Utility Model Content

[0004] The purpose of the utility model is to provide an explosion-proof static push-type rotary guide device for underground coal mines, so as to solve the problem that the rotary guide device in the prior art has high power consumption and cannot meet the safety and explosion-proof requirements of underground coal mines.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] An explosion-proof static push-type rotary guide device for underground coal mines, comprising at least one central cable drill rod, a measurement while drilling short section, a guide device and a directional drill bit, which are fixedly connected in sequence from front to back;

[0007] A channel is opened inside the center cable drill pipe, through which the communication cable is passed, and the communication cable is connected to the measurement while drilling short section;

[0008] The guide device includes a power supply and communication short section and a non-rotating outer shell, and the power supply and communication short section and the non-rotating outer shell are connected through a first TC bearing assembly;

[0009] The power supply and communication sub is provided with a communication connector, a turbine power generation component and a voltage stabilizing output component in sequence; the communication connector is electrically connected to the measurement while drilling sub;

[0010] There is a central rotating short section inside the non-rotating outer shell, which is connected to the voltage stabilizing output component; a push-to-actuate short section is provided on the rear side wall of the non-rotating outer shell;

[0011] The rear end of the non-rotating outer sleeve is connected to the directional drill bit through a second TC bearing assembly.

[0012] The utility model also has the following features:

[0013] Furthermore, the pushing and actuating sub includes a plurality of hydraulic legs, and the plurality of hydraulic legs are evenly distributed along the circumferential direction on the rear side wall of the non-rotating outer casing.

[0014] Further, the push-to-actuate short section includes a hydraulic slap.

[0015] Furthermore, a wireless transmission component is provided inside the measurement while drilling sub;

[0016] A wireless receiving component is provided inside the non-rotating outer cover, and the wireless transmission component is connected to the wireless receiving component;

[0017] The wireless receiving component is respectively connected to each hydraulic leg of the push-pull execution short section.

[0018] Furthermore, the second TC bearing assembly is connected to the directional drill bit through a lower joint.

[0019] Furthermore, a controller is included;

[0020] The controller is connected with the communication cable and the wireless transmission component respectively.

[0021] Compared with the prior art, the present invention has the following technical effects:

[0022] The components of the utility model's underground explosion-proof static push-type rotary guide device for coal mines adopt an explosion-proof structural design. The explosion-proof type of the rotary guide system is a flameproof and intrinsically safe type. The interiors of the cavities are connected to form an explosion-proof cavity, and there is only one port for connection to the outside, which meets the requirements of the underground explosion-proof safety design of coal mines. In addition, the overall outer diameter of the underground explosion-proof static push-type rotary guide device for coal mines of the utility model does not exceed φ140mm, the mud flow requirement is small, the structure is easy to implement, and it is suitable for near-horizontal directional drilling in coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of the utility model of an explosion-proof static push-type rotary guide device for underground coal mines;

[0024] Figure 2 It is a structural schematic diagram of the guide device in the utility model.

[0025] The meaning of each number in the figure is:

[0026] 1. Center cable drill pipe; 2. Measurement while drilling sub; 3. Directional drill bit; 4. Power supply and communication sub; 5. Non-rotating outer sleeve; 6. First TC bearing assembly; 7. Communication connector; 8. Turbine generator assembly; 9. Voltage stabilizing output assembly; 10. Center rotation sub; 11. Push-to-pull execution sub; 1101, hydraulic palm; 12. Second TC bearing assembly; 13. Wireless receiving assembly; 14. Lower connector; 15. Controller. DETAILED DESCRIPTION

[0027] It should be noted that, unless otherwise specified, all components in the present invention are components known in the prior art. For example, the hydraulic shoe is a known and commonly used hydraulic shoe.

[0028] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made on the basis of the technical solution of this application fall within the scope of protection of the present invention.

[0029] It should be noted that all components in the present invention are connected using conventional connection methods in the prior art, and the communication and control between components all use existing algorithms, and do not include improvements to the algorithms.

[0030] like Figure 1 and 2 As shown, an explosion-proof static push-type rotary guide device for underground coal mines includes at least one central cable drill rod 1, a measurement while drilling short section 2, a guide device and a directional drill bit 3 fixedly connected in sequence from front to back;

[0031] A channel is opened inside the center cable drill pipe 1, and a communication cable is passed through the channel, and the communication cable is connected to the measurement while drilling short section 2;

[0032] The guide device includes a power supply and communication short section 4 and a non-rotating outer shell 5, and the power supply and communication short section 4 and the non-rotating outer shell 5 are connected through a first TC bearing assembly 6;

[0033] The power supply and communication sub 4 is provided with a communication connector 7, a turbine power generation component 8 and a voltage stabilizing output component 9 in sequence; the communication connector 7 is electrically connected to the measurement while drilling sub 2;

[0034] A central rotating short section 10 is provided inside the non-rotating outer shell 5, and the central rotating short section 10 is connected to the voltage stabilizing output component 9; a push-to-actuate short section 11 is provided on the rear side wall of the non-rotating outer shell 5;

[0035] The rear end of the non-rotating outer sleeve 5 is connected to the directional drill bit 3 through the second TC bearing assembly 12.

[0036] Among them, the central cable drill rods 1 are connected by threads, and the communication cable forms a wired channel for bidirectional signal transmission;

[0037] One side of the measurement while drilling short section 2 is connected to the center cable drill pipe 1 through a thread, and the other side is connected to the guide device, which is used to measure the drilling trajectory, receive and upload the working status of the guide device, and receive and send control instructions to the guide device; the guide device is connected to the measurement while drilling short section 2 through a thread, adopts a flameproof and intrinsically safe design, and meets the explosion-proof requirements of underground coal mines.

[0038] As a preferred solution, the pushing and leaning execution sub 11 includes a plurality of hydraulic legs 1101 , and the plurality of hydraulic legs 1101 are evenly distributed on the rear side wall of the non-rotating outer casing 5 .

[0039] Furthermore, the pushing and leaning execution sub 11 includes 3-4 hydraulic legs 1101 .

[0040] The push-to-actuate sub 11 includes three or four evenly distributed hydraulic legs 1101. Different hydraulic legs 1101 extend to push against the hole wall to generate lateral force to achieve directional drilling. The non-rotating outer sleeve 5 rotates at a relatively low speed during drilling, generally within 1 r / min, to ensure the stability of the push force output by the push-to-actuate sub 11.

[0041] As a preferred solution, a wireless transmission component is provided inside the measurement while drilling sub 2;

[0042] A wireless receiving component 13 is provided inside the non-rotating outer cover 5, and the wireless transmission component is connected to the wireless receiving component 13;

[0043] The wireless receiving component 13 is connected to each hydraulic leg 1101 of the pushing and leaning execution pup joint 11 respectively.

[0044] As a preferred solution, the second TC bearing assembly 12 is connected to the directional drill bit 3 through the lower joint 14.

[0045] As a preferred solution, it further includes a controller 15;

[0046] The controller 15 is connected to the communication cable and the wireless transmission component respectively.

[0047] The wireless receiving component 13 receives the electric energy and signals sent by the wireless transmission component by a non-contact magnetic coupling method; the wireless receiving component 13 is used to control the working state of the hydraulic leg 1101 of the pushing and leaning execution short section 11.

Claims

1. An explosion-proof static push-type rotary guide device for underground coal mines, characterized in that: It comprises at least one central cable drill rod (1), a measurement while drilling sub (2), a guide device and a directional drill bit (3) which are fixedly connected in sequence from front to back; A channel is provided inside the central cable drill rod (1), a communication cable is passed through the channel, and the communication cable is connected to a measurement while drilling sub (2); The guide device comprises a power supply and communication short section (4) and a non-rotating outer shell (5), wherein the power supply and communication short section (4) and the non-rotating outer shell (5) are connected via a first TC bearing assembly (6); The power supply and communication subsection (4) is provided with a communication connector (7), a turbine power generation component (8) and a voltage stabilization output component (9) in sequence; the communication connector (7) is electrically connected to the measurement while drilling subsection (2); The non-rotating outer shell (5) has a central rotating short section (10) inside, and the central rotating short section (10) is connected to the voltage-stabilizing output component (9); a pushing execution short section (11) is provided on the rear side wall of the non-rotating outer shell (5); The rear end of the non-rotating outer sleeve (5) is connected to the directional drill bit (3) through a second TC bearing assembly (12).

2. The explosion-proof static push-type rotary guide device for underground coal mines according to claim 1, characterized in that: The pushing and actuating short section (11) comprises a plurality of hydraulic legs (1101), and the plurality of hydraulic legs (1101) are evenly distributed along the circumferential direction on the rear side wall of the non-rotating outer sleeve (5).

3. The explosion-proof static push-type rotary guide device for underground coal mines according to claim 2, characterized in that: The pushing and leaning execution short section (11) includes 3-4 hydraulic legs (1101).

4. The explosion-proof static push-type rotary guide device for underground coal mines according to claim 2, characterized in that: The measurement while drilling sub (2) is internally provided with a wireless transmission component; A wireless receiving component (13) is provided inside the non-rotating outer cover (5), and the wireless transmission component is connected to the wireless receiving component (13); The wireless receiving component (13) is respectively connected to each hydraulic leg (1101) of the pushing and leaning execution short section (11).

5. The explosion-proof static push-type rotary guide device for underground coal mines according to claim 1, characterized in that: The second TC bearing assembly (12) is connected to the directional drill bit (3) via a lower joint (14).

6. The explosion-proof static push-type rotary guide device for underground coal mines according to claim 4, characterized in that: Also included is a controller (15); The controller (15) is connected to the communication cable and the wireless transmission component respectively.

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