Mining wired measurement-while-drilling exploring tube

Abstract

The utility model provides a mining wired measurement-while-drilling exploring tube. The mining wired measurement-while-drilling exploring tube comprises a transmission connecting unit, a protection fixing unit and a measurement control unit. According to the technical scheme provided by the utility model, through innovative designs such as multi-stage sealing design, vibration reduction structure design, high-precision mechanical fine adjustment, a comprehensive calibration method and directional joint design, the problems existing in the use process of the existing wired measurement-while-drilling exploring tube are effectively solved, and the durability, the stability and the measurement precision of the exploring tube are improved; and more reliable and accurate measurement support is provided for directional drilling under complex working conditions.

Description

Technical Field

[0001] The utility model relates to the field of mine probes, in particular to a wired measurement-while-drilling probe for mines. Background Art

[0002] With the rapid development of social economy, the demand for energy in all walks of life in my country is also increasing, and fossil energy still accounts for a relatively large proportion. my country is rich in coal, poor in oil and little in gas. Coal resources are abundant, but underground coal mining is also accompanied by many safety accidents every year, of which gas accidents account for more than 30%. Therefore, directional drilling before coal mining and then implementing gas extraction is an effective means to avoid gas accidents. Crawler directional drilling rigs are generally used in underground coal mines, equipped with a wired measurement while drilling system to implement directional drilling in different stratum structures.

[0003] However, the wired measurement while drilling probes in existing wired measurement while drilling systems have the following problems during use: 1) Since the transmission connection unit of the general wired measurement while drilling probes is isolated by insulating materials, and the internal circuit board skeleton and the directional joint on one side are an integrated structure, when used in various complex working conditions, vibration and impact cause damage to the probe transmission connection unit or damage to sensors and chips on the circuit skeleton, thereby causing damage to the probe; 2) Existing measurement while drilling probes generally use software compensation to achieve precision calibration. For example, the installation deviation of the acceleration sensor and the magnetic sensor is large, and simple software compensation cannot achieve high-precision measurement. For directional drilling with target shooting requirements, accurate drilling cannot be achieved, resulting in drilling failure. Utility Model Content

[0004] In order to solve the problems in the prior art of being used in various complex working conditions, such as damage to the probe tube transmission connection unit caused by vibration and impact or damage to sensors and chips on the circuit skeleton, which in turn causes damage to the probe tube, and large installation deviations of the acceleration sensor and the magnetic sensor, and the inability of simple software compensation to achieve high-precision measurement, the utility model provides a wired measurement-while-drilling probe tube for mining;

[0005] The utility model provides a mine-use wired measurement while drilling probe adopts the following technical solutions:

[0006] A wired measurement while drilling probe for mining, comprising a transmission connection unit, a protection and fixing unit, and a measurement control unit;

[0007] The transmission connection unit includes a lead rod, an insulating seat, a directional joint, an insulating gasket and a nut. Stepped holes are provided inside the insulating seat and the directional joint. The insulating seat is threadedly connected to the directional joint and achieves multi-level sealing with an O-ring through the stepped hole. The lead rod is provided inside the insulating seat and passes through the inner holes of the insulating seat and the directional joint and is fixed by a nut. An insulating gasket is provided between the lead rod and the inner side wall of the directional joint, and an O-ring is installed on the outer wall of the lead rod to achieve sealing between the lead rod and the insulating seat.

[0008] The protective fixing unit includes an outer protective tube, a front joint, a centralizer, a protective cap and an aviation socket. The right side of the directional joint is connected to the outer protective tube through a thread and is sealed by an O-ring 4. The right side of the outer protective tube is connected to the front joint through a thread and is sealed by an O-ring 4. The outer side wall of the front joint is installed with a centralizer. The right side of the front joint is connected to the protective cap through a thread and is sealed by an O-ring 6. A stepped hole is opened inside the front joint, and the front joint is threadedly connected to the aviation socket through the stepped hole.

[0009] The measurement control unit is installed inside the protective fixing unit, including a vibration damping spring, a circuit board frame, a circuit board, an acceleration sensor, and a magnetic sensor. The right end of the directional joint is welded with a vibration damping spring, and the right end of the vibration damping spring is welded with a circuit board frame; a point circuit board, an acceleration sensor, and a magnetic sensor are installed inside the circuit board frame; O-rings are installed at both ends of the circuit board frame to center the circuit board frame inside the outer protective cylinder;

[0010] Furthermore, the circuit board frame has two square slots formed in the horizontal and vertical directions, respectively. The circuit board is fixed in the vertically formed square slot of the circuit board frame by a cylindrical head screw, and the acceleration sensor and the magnetic sensor are installed in the horizontally formed square slot of the circuit board frame.

[0011] Furthermore, a wire is welded inside the right side of the lead rod to be electrically connected to the circuit board, the acceleration sensor and the magnetic sensor are electrically connected to the circuit board through the wire, and the aviation socket is electrically connected to the circuit board through the wire;

[0012] Furthermore, a CPU, a voltage-stabilized power supply, and a memory chip are welded inside the circuit board to realize the control and transmission of the measurement data;

[0013] Furthermore, the acceleration sensor and magnetic sensor are each fixed in a horizontally provided square slot of the circuit board frame by six cylindrical head screws in pairs, with two of the six cylindrical head screws forming a pair; three pairs of cylindrical head screws are respectively provided in three different directions of the acceleration sensor and the magnetic sensor for mechanical fine-tuning, and high-precision compensation is performed through software compensation to ensure acquisition of high-precision inclination and azimuth measurement data;

[0014] Furthermore, at least two directional keys are welded to the outer side wall of the directional joint to match the keyways of the non-magnetic drill pipe of the matching instrument;

[0015] Furthermore, at least three supports are integrally formed on the outer side wall of the centralizer, so as to center the measurement while drilling probe in the inner hole of the non-magnetic drill pipe of the instrument.

[0016] In summary, the beneficial effects of the present invention are as follows:

[0017] The utility model effectively prevents external liquid or gas from entering the interior of the probe tube through the threaded connection and O-ring multi-stage sealing between the insulating seat and the directional joint, protecting the internal circuit and components from corrosion and damage. In addition, a vibration-damping spring is introduced between the directional joint and the circuit board frame. This design effectively alleviates the impact of vibration and impact on the circuit frame and the components thereon, improving the vibration and impact resistance of the probe tube. Moreover, through modular design, the circuit board frame and key components such as the directional joint are separated, avoiding the spread of damage caused by the integrated structure, making the probe tube easier to repair and replace when damaged.

[0018] The utility model uses six cylindrical head screws in groups of two to perform mechanical fine-tuning of the acceleration sensor and the magnetic sensor in three different directions, ensuring the precise installation and positioning of the sensors, thereby improving the measurement accuracy; combining mechanical fine-tuning and software compensation, the utility model realizes the comprehensive calibration of the measurement error, effectively reduces the measurement error caused by installation deviation, and improves the reliability and accuracy of the measurement; and the matching design of the directional key welded on the outer wall of the directional joint and the keyway of the non-magnetic drill pipe of the supporting instrument ensures the correct position and direction of the probe tube in the drill pipe, further improving the stability and accuracy of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 This is a three-dimensional diagram of manual calibration of the acceleration sensor and magnetic sensor of the utility model.

[0021] Figure 3 This is a schematic diagram of the overall structure of the directional joint of the utility model.

[0022] Figure 4 This is a schematic diagram of the overall structure of the centralizer of the utility model.

[0023] Figure 5 The utility model is a structural schematic diagram of a mine-used wired measurement while drilling probe tube installed in an instrument non-magnetic drill rod.

[0024] As shown in the figure: 1. Lead rod, 2. Insulation seat, 3. Orientation joint, 31. Orientation key, 4. Insulation washer, 5. Nut, 6. Vibration damping spring, 7. Circuit board frame, 8. Circuit board, 9. Outer protective tube, 10. Accelerometer, 11. Magnetic sensor, 12. Front connector, 13. Centralizer, 14. Protective cap, 15. Aviation socket, 16. O-ring (1), 17. O-ring (2), 18. O-ring (3), 19. O-ring (4), 20. O-ring (5), 21. Cylinder head screw (1), 22. Set screw, 23. O-ring (6), 24. Cylinder head screw (2), 25. Non-magnetic drill pipe, 26. Wired MWD probe. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-5 The utility model is further described in detail:

[0026] The present invention discloses a wired measurement while drilling probe for mining. Figure 1 、 2 As shown, a wired measurement while drilling probe for mining includes a transmission connection unit, a protection and fixing unit, and a measurement control unit;

[0027] like Figure 1 、 2As shown, the transmission connection unit includes a lead rod 1, an insulating seat 2, a directional joint 3, an insulating gasket 4 and a nut 5. Step holes are provided inside the insulating seat 2 and the directional joint 3. The insulating seat 2 is threadedly connected to the directional joint 3 and a multi-level seal is achieved through the stepped hole and the O-ring. The insulating seat 2 is provided with a lead rod 1 inside, and passes through the inner holes of the insulating seat 2 and the directional joint 3 and is fixed by the nut 5. An insulating gasket 4 is provided between the inner side wall of the lead rod 1 and the directional joint 3, and an O-ring 17 is installed on the outer wall of the lead rod 1 to achieve a seal between the lead rod 1 and the insulating seat 2. A wire is welded inside the right side of the lead rod 1 to electrically connect with the circuit board 8. The acceleration sensor 10 and the magnetic sensor 11 are electrically connected with the circuit board 8 through a wire. The aviation socket 15 is provided with a lead rod 11. It is electrically connected to the circuit board 8 through a wire. In this embodiment, the insulating seat 2 and the directional joint 3 are tightly connected by threads to form a stepped hole structure, and multi-level sealing is achieved by O-rings to prevent external liquid or gas from entering the interior of the probe. The lead rod 1 passes through the inner holes of the insulating seat 2 and the directional joint 3 and is fixed by a nut 5 to ensure the stability of the lead rod 1 and the continuity of data transmission. The insulating pad 4 is arranged between the lead rod 1 and the inner wall of the directional joint 3 to further increase the insulation performance. The O-ring 17 is installed on the outer wall of the lead rod 1 to achieve a seal with the insulating seat 2. The multi-level sealing design improves the waterproof and dustproof performance of the probe and is suitable for complex working conditions. The stable physical connection and data transmission channel ensure the reliability and durability of the probe.

[0028] like Figure 1 、 2As shown, the protection and fixing unit includes an outer protection tube 9, a front joint 12, a centralizer 13, a protection cap 14 and an aviation socket 15. The right side of the directional joint 3 is connected to the outer protection tube 9 by a thread and is sealed by an O-ring 19. The right side of the outer protection tube 9 is connected to the front joint 12 by a thread and is sealed by an O-ring 19. The outer side wall of the front joint 12 is installed with a centralizer 13. The right side of the front joint 12 is connected to the protection cap 14 by a thread and is sealed by an O-ring 23. A stepped hole is opened inside the front joint 12, and the front joint 12 is threadedly connected to the aviation socket 15 through the stepped hole. In this embodiment, the right side of the directional joint 3 is connected to the outer protection tube 9 by a thread and is sealed by an O-ring 19. The outer protective tube 9 is further connected to the front joint 12 on the right side through a thread, and is also sealed by an O-ring 19; the centralizer 13 is installed on the outer side wall of the front joint 12 to keep the probe tube in the center position inside the drill pipe; the protective cap 14 is connected to the right side of the front joint 12 through a thread and is sealed by an O-ring 23 to protect the end of the probe tube from damage; the aviation socket 15 is threadedly connected to the inside of the front joint 12 through a stepped hole for data transmission with external equipment. Such a structure provides a strong protective structure and improves the impact and vibration resistance of the probe tube; the centralizer 13 ensures the center position of the probe tube in the drill pipe, improving the accuracy of the measurement; the aviation socket 15 provides a convenient data transmission interface;

[0029] like Figure 1 、 2As shown, the measurement control unit is installed inside the protective fixing unit, including a vibration-damping spring 6, a circuit board frame 7, a circuit board 8, an acceleration sensor 10 and a magnetic sensor 11. The right end of the directional joint 3 is welded with a vibration-damping spring 6. The right end of the vibration-damping spring 6 is welded with a circuit board frame 7; the inside of the circuit board frame 7 is installed with a circuit board 8, an acceleration sensor 10 and a magnetic sensor 11; O-rings 5 ​​20 are respectively installed at both ends of the circuit board frame 7 to center the circuit board frame 7 in the outer protective tube 9; in this embodiment, the right end of the directional joint 3 is welded with a vibration-damping spring 6, and the right end of the vibration-damping spring 6 is welded with the circuit board frame 7 to form a stable supporting structure; the circuit board 8 is fixed in the square groove vertically opened in the circuit board frame 7 by a cylindrical head screw 1 21; the acceleration sensor 10 and the magnetic sensor 11 are installed in the circuit board frame 7. The plate frame 7 is horizontally provided with a square slot and mechanically fine-tuned by six cylindrical head screws 24; the wire on the right side of the lead rod 1 is electrically connected to the circuit board 8, and the acceleration sensor 10 and the magnetic sensor 11 are also electrically connected to the circuit board 8 via wires; a CPU, a voltage-stabilized power supply, and a memory chip are welded inside the circuit board 8 to realize the control and transmission of measurement data; the aviation socket 15 is electrically connected to the circuit board 8 via a wire to realize data transmission with external devices; in this structure, the design of the vibration-damping spring 6 and the circuit board frame 7 improves the vibration resistance of the probe and protects the internal components; mechanical fine-tuning and high-precision compensation technology ensure high-precision measurement of the acceleration sensor 10 and the magnetic sensor 11; the CPU, voltage-stabilized power supply, and memory chip inside the circuit board 8 provide stable data processing and storage capabilities;

[0030] like Figure 1 、 2As shown, the interior of the circuit board skeleton 7 has two square slots respectively formed in the horizontal and vertical directions. The circuit board 8 is fixed in the vertical square slot of the circuit board skeleton 7 by a cylindrical head screw 21. The acceleration sensor 10 and the magnetic sensor 11 are installed in the horizontal square slot of the circuit board skeleton 7. The acceleration sensor 10 and the magnetic sensor 11 are each fixed in the horizontal square slot of the circuit board skeleton 7 by a group of six cylindrical head screws 24. Two of the six cylindrical head screws 24 form a pair. Three pairs of cylindrical head screws 24 are respectively provided in three different directions of the acceleration sensor 10 and the magnetic sensor 11 for mechanical fine adjustment. High-precision compensation is performed through software compensation to ensure high-precision inclination and azimuth measurement data. In this embodiment, the acceleration sensor 10 and the magnetic sensor 11 are respectively installed in the horizontal square slots of the circuit board skeleton 7. Each sensor is mechanically fine-tuned by three cylindrical head screws 24 in different directions to ensure that the sensor's installation position and angle are accurate. Through software compensation, measurement errors caused by installation deviations are compensated with high precision. The mechanical fine-tuning technology ensures the accuracy of the sensor's installation position and angle. The software compensation technology improves the measurement accuracy and reliability, achieving high-precision measurement.

[0031] like Figure 3-5 As shown, the outer wall of the directional joint 3 is welded with at least two directional keys 31, which match the key slots of the matching instrument non-magnetic drill rod 25; the outer wall of the stabilizer 13 is integrally formed with at least three supports, which center the measurement while drilling probe in the inner hole of the instrument non-magnetic drill rod 25. In this embodiment, the outer wall of the directional joint 3 is welded with at least two directional keys 31, which match the key slots of the matching instrument non-magnetic drill rod 25, ensuring the correct position and direction of the probe in the drill rod; the outer wall of the stabilizer 13 is integrally formed with at least three supports, which center the measurement while drilling probe in the inner hole of the instrument non-magnetic drill rod 25, preventing the probe from shaking or deflecting in the drill rod; the design of the directional joint 3 ensures the correct matching and positioning of the probe and the drill rod; the stabilizer 13 improves the stability of the probe in the drill rod and the accuracy of measurement.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. The various components mentioned in the present invention are common technologies in the existing field. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in this utility model is defined by the appended claims and their equivalents.

Claims

1. A wired measurement while drilling probe for mining, characterized by: It includes transmission connection unit, protection fixing unit and measurement control unit; The transmission connection unit comprises a lead rod (1), an insulating seat (2), a directional joint (3), an insulating pad (4) and a nut (5); a stepped hole is provided inside the insulating seat (2) and inside the directional joint (3); the insulating seat (2) and the directional joint (3) are threadedly connected and achieve multi-stage sealing with an O-ring through the stepped hole; a lead rod (1) is provided inside the insulating seat (2), passes through the inner holes of the insulating seat (2) and the directional joint (3), and is fixed by a nut (5); an insulating pad (4) is provided between the inner side wall of the lead rod (1) and the directional joint (3), and an O-ring (17) is installed on the outer side wall of the lead rod (1) to achieve sealing between the lead rod and the insulating seat (2); The protection fixing unit comprises an outer protection tube (9), a front joint (12), a centralizer (13), a protection cap (14) and an aviation socket (15); the right side of the directional joint (3) is connected to the outer protection tube (9) by a thread and is sealed by an O-ring (19); the right side of the outer protection tube (9) is connected to the front joint (12) by a thread and is sealed by an O-ring (19); the outer side wall of the front joint (12) is installed with a centralizer (13); the right side of the front joint (12) is connected to the protection cap (14) by a thread and is sealed by an O-ring (23); a stepped hole is provided inside the front joint (12); the front joint (12) is threadedly connected to the aviation socket (15) through the stepped hole; The measurement control unit is installed inside the protective fixing unit and includes a vibration damping spring (6), a circuit board frame (7), a circuit board (8), an acceleration sensor (10) and a magnetic sensor (11). The right end of the directional joint (3) is welded with the vibration damping spring (6), and the right end of the vibration damping spring (6) is welded with the circuit board frame (7); the circuit board (8), the acceleration sensor (10) and the magnetic sensor (11) are installed inside the circuit board frame (7); O-rings (20) are respectively installed at both ends of the circuit board frame (7) so that the circuit board frame (7) is centered inside the outer protective tube (9).

2. A wired measurement while drilling probe for mining according to claim 1, characterized in that The circuit board frame (7) has two square grooves formed inside in the horizontal and vertical directions, respectively. The circuit board (8) is fixed in the square groove formed vertically in the circuit board frame (7) by a cylindrical head screw (21), and the acceleration sensor (10) and the magnetic sensor (11) are installed in the square groove formed horizontally in the circuit board frame (7).

3. A wired measurement while drilling probe for mining according to claim 1, characterized in that The right side of the lead rod (1) is electrically connected to the circuit board (8) by welding a wire inside the lead rod (1), the acceleration sensor (10) and the magnetic sensor (11) are electrically connected to the circuit board (8) through the wire, and the aviation socket (15) is electrically connected to the circuit board (8) through the wire.

4. A wired measurement while drilling probe for mining according to claim 1, characterized in that A CPU, a voltage-stabilized power supply, and a storage chip are welded inside the circuit board (8) to realize the control and transmission of measurement data.

5. A wired measurement while drilling probe for mining according to claim 1, characterized in that The acceleration sensor (10) and the magnetic sensor (11) are each fixed in a horizontally opened square groove of the circuit board frame (7) by a group of six cylindrical head screws (24), two of the six cylindrical head screws (24) forming a pair; three pairs of cylindrical head screws (24) are respectively arranged in three different directions of the acceleration sensor (10) and the magnetic sensor (11) for mechanical fine adjustment, and high-precision compensation is performed by software compensation to ensure that high-precision inclination and azimuth measurement data are obtained.

6. A wired measurement while drilling probe for mining according to claim 1, characterized in that At least two directional keys (31) are welded to the outer side wall of the directional joint (3) to match the key slots of the matching instrument non-magnetic drill rod (25).

7. A wired measurement while drilling probe for mining according to claim 1, characterized in that The outer side wall of the centralizer (13) is integrally formed with at least three supports, and the measurement while drilling probe (26) is centered in the inner hole of the instrument non-magnetic drill rod (25).

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