Directional hole directional positioning instrument for coal field drilling

Abstract

The utility model discloses a coal field drilling directional hole directional positioning instrument which comprises a directional drilling rod, a directional positioning instrument body is assembled in the directional drilling rod, a communication connector is arranged at the tail end of the directional positioning instrument body, a communication cable is assembled in the directional drilling rod, the communication cable is arranged in the axial direction of the directional drilling rod, and the communication connector is connected with the directional drilling rod. The end part of the communication cable is provided with a connecting structure connected with the communication joint; the utility model relates to the technical field of coal field drilling, in particular to a directional hole directional positioning instrument for coal field drilling, which adopts a mode of detection while drilling to realize movable connection between an external cable and the directional positioning instrument, and utilizes a double-section extension pipe arranged in a stabilizer to extend an inner pipe and an outer sheath pipe. The cable inlet direction of the wiring position is guaranteed to be perpendicular to the connector of the orientation and positioning instrument, wiring is more stable, meanwhile, damping deformation protection is carried out on the outer protective sleeve through the damping protection ring pad, the communication cable is effectively protected, and instability of signal transmission is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of coalfield drilling, in particular to a directional positioning instrument for directional holes in coalfield drilling. Background Art

[0002] In the modern coal mining process, in order to accurately locate the coal seam, drilling is often used to detect the coal seam. In order to make the drilling positioning hole conform to the designed orientation, most of the drilling measurement devices are connected to the drill rod behind the drill bit.

[0003] The measurement while drilling device will measure and locate the drilling angle, and then transmit the data back through the cable, so that the ground personnel can know the drilling angle and direction through the host computer. Ordinary directional positioning instruments are deep in the formation, so cables are usually used for data transmission while drilling. Since the measurement while drilling device needs to cooperate with the rotation and movement of the drill pipe, and the data cable cannot rotate too much, a communication connector is set on the tail end tube of the directional positioning while drilling instrument. However, during the use of the communication connector, due to the vibration and friction between the external drill pipe and the formation, the connection position between the directional positioning instrument and the cable in the drill pipe must not only resist the rotational force, but also overcome the radial force caused by the vibration. In the long-term use process, the connection position between the directional positioning instrument and the cable will be damaged. In view of this, in-depth research was conducted on the above-mentioned problems, and this case came into being. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a directional positioning instrument for directional hole drilling in coalfields, which solves the problems of the prior art.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a directional positioning instrument for directional drilling of coalfields, comprising a directional drill rod, a directional positioning instrument is installed in the directional drill rod, a communication connector is arranged at the tail end of the positioning and directional instrument, a communication cable is installed in the directional drill rod, the communication cable is arranged along the axial direction of the directional drill rod, and a connection structure is provided at the end of the communication cable to connect with the communication connector;

[0006] The connection mechanism includes an aviation plug, an aviation socket is provided on the communication connector, the aviation plug is plugged into the aviation socket, a connecting line extends from the tail of the aviation plug, a communication rotary connector is provided at the tail end of the connecting line, and a tail protector is connected to one side of the communication rotary connector;

[0007] The communication rotary connector is connected to the end of the communication cable, and the tail protector is wrapped around the outside of the communication cable;

[0008] The connection mechanism also includes a stabilizer, the tail end of the directional positioning instrument is threadedly connected with the stabilizer, the stabilizer is a truncated cone cover, the head end of the stabilizer is provided with a rotation groove, and the tail protector is installed in the rotation groove.

[0009] Preferably, a bearing is provided in the rotating groove at the head end of the stabilizer to protect the tail protector.

[0010] Preferably, the tail protector is connected to the end of the communication rotary connector by screws.

[0011] Preferably, the tail protector includes an extended inner tube, which is inserted into the stabilizer from the rotation groove of the stabilizer and connected to the communication rotator. The outer side of the extended inner tube is connected to a limiting gasket, which blocks the rotation groove. An outer sheath tube is provided on one side of the limiting gasket. The communication cable is connected to the communication rotator by the outer sheath tube passing through the limiting gasket and the extended inner tube.

[0012] Preferably, a shock-absorbing protective ring gasket is provided at the end of the outer sheath tube and is sleeved outside the communication cable.

[0013] The utility model provides a directional positioning instrument for directional holes in coalfield drilling. It has the following beneficial effects: the directional positioning instrument for directional holes in coalfield drilling adopts a detection-while-drilling method, utilizes a stabilizer and a communication rotator arranged in a directional drill rod to follow the directional positioning instrument, realizes the movable connection between the external cable and the directional positioning instrument, utilizes a double-section extension tube arranged in the stabilizer to extend both the inner tube and the outer sheath tube, ensures that the cable entry direction at the wiring position is perpendicular to the joint of the directional positioning instrument, makes the wiring more stable, and at the same time, a shock-absorbing protective ring pad is used on the outer sheath tube for shock-absorbing deformation protection, effectively protects the communication cable, and avoids the instability of signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic cross-sectional structure diagram of the directional positioning instrument for directional hole drilling in coalfields.

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the directional positioning instrument for directional hole drilling in coalfields according to the utility model.

[0016] Figure 3 It is a schematic diagram of the local blasting structure of the directional positioning instrument for directional hole drilling in coalfields according to the utility model.

[0017] In the figure: 1. directional drill rod; 2. directional positioning instrument; 3. communication connector; 4. communication cable; 5. aviation plug; 6. aviation socket; 7. connecting line; 8. rotary connector; 9. tail protector; 10. stabilizer; 11. bearing; 901. extension inner tube; 902. limit gasket; 903. outer casing tube; 904. shock-absorbing protection ring pad. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3 The utility model provides an implementation scheme: in the modern coalfield drilling application process, in order to better understand the coalfield geological information, it is necessary to drill the coalfield strata to obtain the coal seam information. At present, the coal seam drilling mainly uses a directional drill bit. During the operation of the directional drill bit, in order to more accurately detect the drill bit position, a magnetic positioning instrument is often used. A directional positioning instrument 2 is installed in the drill rod behind the drill bit, and a magnetic field is arranged at the bottom where the drill bit passes. The magnetic changes sensed by the directional positioning instrument 2 are used to measure the position and direction of the drill bit and other data, and the data is transmitted back to the host through a cable, and the host is used to control the drilling direction of the drill bit.

[0020] In view of the above problems, the present application discloses a directional positioning instrument 2 for directional drilling of coalfields. The device is connected to the drill bit and the rear drill rod through a directional drill rod 1. The directional positioning instrument 2 is installed in the directional drill rod 1. The directional positioning instrument 2 can interact with the ground magnetic field to measure the drill bit azimuth angle and other data. A communication connector 3 is provided at the tail end of the positioning and directional instrument. A communication cable 4 is installed in the directional drill rod 1. The communication cable 4 is arranged along the axial direction of the directional drill rod 1. The end of the communication cable is provided with a connection structure connected to the communication connector 3. The measurement data can be transmitted back to the ground host through the communication cable.

[0021] According to the instruction manual Figure 1-3 It can be seen that the above-mentioned connection mechanism includes an aviation plug 5, an aviation socket 6 is provided on the communication connector 3, the aviation plug 5 is plugged into the aviation socket 6, a connecting line 7 extends from the tail of the aviation plug 5, a communication rotary connector 8 is provided at the tail end of the connecting line 7, and a tail protector 9 is connected to one side of the communication rotary connector 8;

[0022] In the specific implementation process, the aviation plug 5 is inserted into the aviation socket 6 to realize the connection between the communication cable 4 and the directional positioning instrument 2. In the process of matching the aviation plug 5 with the aviation socket 6, the tail end of the aviation plug 5 is also provided with a connecting line 7, which can be connected to the rear rotary connector 8 through the connecting line 7. The rotary connector 8 is a kind of adapter permanently provided in the rotating position of the optical cable. Through this adapter, one side of the tail protector 9 remains stationary, while the aviation plug 5 and the connecting line 7 rotate synchronously;

[0023] In order to further connect the communication cable with the positioning and directional instrument, improve the stability of the connection and avoid vibration affecting the connection position, causing the connection position to fall off, etc., the communication rotary connector 8 is connected to the end of the communication cable 4, and the tail protector 9 is wrapped around the outside of the communication cable 4, and the tail protector 9 protects the communication cable 4; furthermore, the connection mechanism also includes a stabilizer 10, and the tail end of the directional positioning instrument 2 is threadedly connected with the stabilizer 10, the stabilizer 10 is a truncated cone-shaped cover, and the head end of the stabilizer 10 is provided with a rotation groove, and the tail protector 9 is installed in the rotation groove. In the specific implementation process, the stabilizer 10 is connected to the tail end of the directional positioning instrument 2. During the application process, the stabilizer 10 rotates synchronously with the directional positioning instrument 2, and the tail protector 9 remains stationary, so that the outside of the communication cable 4 is protected by the tail protector 9, and the tail protector 9 is stabilized when subjected to lateral vibration, thereby improving.

[0024] As a preferred solution, further, a bearing 11 is provided in the rotating groove at the head end of the stabilizer 10 to protect the tail protector 9, reduce the friction of rotation, and avoid damage to the tail protector 9 caused by excessive friction.

[0025] As a preferred solution, further, the tail protector 9 is connected to the end of the communication rotary connector 8 by screws to facilitate connection and disassembly.

[0026] As a preferred solution, further, according to the attached description Figure 1-3 It can be seen that the tail protector 9 includes an extended inner tube 901, which is inserted into the stabilizer 10 from the rotation groove of the stabilizer 10 and connected to the communication rotator. The outer side of the extended inner tube 901 is connected to a limiting gasket 902, which is blocked on the rotation groove. An outer sheath tube 903 is provided on one side of the limiting gasket 902. The communication cable 4 is connected to the communication rotator by the outer sheath tube 903 passing through the limiting gasket 902 and the extended inner tube 901;

[0027] In the specific implementation process, the communication rotator is connected through the extended inner tube 901. When the stabilizer 10 is adapted to rotate the aviation socket 6 and the aviation plug 5, the stabilizer 10 cooperates with the extended inner tube 901 to stabilize the communication cable 4 to prevent the communication cable 4 from rotating. Then, the extended inner tube 901 and the outer sheath tube 903 are separated by the limiting gasket 902, and the cooperation with the extended inner tube 901 plays a limiting role.

[0028] As a preferred solution, further, a shock-absorbing protection ring pad 904 is provided at the end of the outer sheath tube 903 and is sleeved outside the communication cable 4. The shock-absorbing protection ring pad 904 protects the communication cable 4 and provides deformation protection when the communication cable 4 is subjected to radial force.

[0029] From the above, it can be generally known that the directional positioning instrument 2 for directional holes in coalfield drilling adopts a detection-while-drilling method, and utilizes the stabilizer 10 and the communication rotator arranged in the directional drill rod 1 to follow the directional positioning instrument 2 to realize the active connection between the external cable and the directional positioning instrument 2. The double-section extension tube arranged in the stabilizer 10 is used to extend the inner tube 901 and the outer sheath tube 903 to ensure that the cable entry direction of the wiring position remains perpendicular to the connector of the directional positioning instrument 2, making the wiring more stable. At the same time, the shock-absorbing protection ring pad 904 is used on the outer sheath tube 903 to perform shock-absorbing deformation protection, thereby effectively protecting the communication cable 4 and avoiding unstable signal transmission.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A directional positioning instrument (2) for directional drilling of coalfields, comprising a directional drill rod (1), wherein the directional drill rod (1) is equipped with a directional positioning instrument (2), a communication connector (3) is provided at the tail end of the positioning instrument, and a communication cable (4) is equipped in the directional drill rod (1), characterized in that: The communication cable (4) is arranged along the axial direction of the directional drilling rod (1), and a connection structure is provided at the end of the communication cable to be connected to the communication connector (3); The connection structure comprises an aviation plug (5), an aviation socket (6) is provided on the communication connector (3), the aviation plug (5) is plugged into the aviation socket (6), a connecting line (7) extends from the tail of the aviation plug (5), a communication rotary connector (8) is provided at the tail end of the connecting line (7), and a tail protector (9) is connected to one side of the communication rotary connector (8); The communication rotary connector (8) is connected to the end of the communication cable (4), and the tail protector (9) is wrapped around the outside of the communication cable (4); The connection structure further comprises a stabilizer (10), the tail end of the directional positioning instrument (2) being threadedly connected to the stabilizer (10), the stabilizer (10) being a truncated cone-shaped cover, the head end of the stabilizer (10) being provided with a rotation groove, and the tail protector (9) being installed in the rotation groove.

2. The directional positioning instrument (2) for directional hole drilling in coalfield according to claim 1, characterized in that: A bearing (11) is arranged in the rotating groove at the head end of the stabilizer (10) to protect the tail protector (9).

3. The directional positioning instrument (2) for directional hole drilling in coalfield according to claim 2, characterized in that: The tail protector (9) is connected to the end of the communication rotary connector (8) via screws.

4. The directional positioning instrument (2) for directional hole drilling in coalfield according to claim 3, characterized in that: The tail protector (9) comprises an extended inner tube (901), the extended inner tube (901) is inserted into the stabilizer (10) from the rotation groove of the stabilizer (10) and is connected to the communication rotator, the outer side of the extended inner tube (901) is connected to a limit gasket (902), the limit gasket (902) is blocked on the rotation groove, an outer sheath tube (903) is provided on one side of the limit gasket (902), and the communication cable (4) is connected to the communication rotator by the outer sheath tube (903) passing through the limit gasket (902) and the extended inner tube (901).

5. The directional positioning instrument (2) for directional hole drilling in coalfield according to claim 4, characterized in that: The end of the outer sheath tube (903) is provided with a shock-absorbing protective ring pad (904) which is sleeved outside the communication cable (4).

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