Coal mine through cable drill rod capable of preventing signal loss

Abstract

The utility model relates to the technical field of directional drilling, in particular to a coal mine through cable drill rod capable of preventing signal loss, which comprises a drill rod body, an insulating female joint, an insulating wire pipe and an insulating male joint, an insulating female connector is installed at the end, close to the female connector, in the drill rod body, an insulating male connector is installed at the end, close to the male connector, in the drill rod body, an insulating wire pipe is inserted between the two opposite ends of the insulating female connector and the insulating male connector, and a straight connector and a conical connector are inserted into the opposite ends of the insulating female connector and the insulating male connector. A signal line penetrates through the insulated wire tube, and two ends of the signal line respectively penetrate through the insulated female joint and the insulated male joint to be in threaded connection with the straight joint and the conical joint. The insulating joint and the drill rod body are circumferentially positioned, so that the problems of drill rod damage and signal loss caused by rotating and loosening of the insulating joint are prevented; axial positioning of the insulation joint is realized, and the problem of signal loss caused by pull-off of the insulation joint is prevented.

Description

Technical Field

[0001] This utility model relates to the field of directional drilling technology, and in particular to a coal mine cable drill rod for preventing signal loss. Background Technology

[0002] Cable-stayed drill pipes used in coal mines primarily serve to extend the drilling depth and transmit logging signals. Conventional cable-stayed drill pipes present the following risks due to structural issues:

[0003] 1. The friction between the insulating joint and the insulating conduit sealing ring in the cable connection assembly is relatively large. The insulating joint has no anti-loosening structure and is only glued to the insulating conduit. This often causes the insulating joint of one drill rod to rotate with the insulating joint of the other drill rod when the coupling is put on or removed, resulting in loosening of the internal connection of the cable connection assembly.

[0004] 2. Axial tension can cause the stainless steel retaining ring to deform, thereby causing the insulating joint to shift.

[0005] 3. The insulating joint and the insulating conduit are connected by threads. The insulating conduit will shorten when it gets cold, which will cause the insulating joint or the insulating conduit to break.

[0006] All of the above problems will lead to poor contact in the signal transmission component assembly, resulting in poor signal transmission or signal loss. Summary of the Invention

[0007] Therefore, the purpose of this utility model is to provide a coal mine cable drill rod that prevents signal loss, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the following technical solution is adopted:

[0009] A coal mine cable drill rod for preventing signal loss includes a drill rod body, an insulated female connector, an insulated conduit, and an insulated male connector;

[0010] An insulated female connector is installed at one end of the drill pipe body near the female connector, and an insulated male connector is installed at one end of the drill pipe body near the male connector. An insulated conduit is inserted between the opposite ends of the insulated female connector and the insulated male connector. A straight head and a tapered head are inserted into the opposite ends of the insulated female connector and the insulated male connector. A signal wire is threaded through the insulated conduit, and the two ends of the signal wire pass through the insulated female connector and the insulated male connector respectively and are threaded to the straight head and the tapered head.

[0011] Two anti-rotation lugs are radially provided on the outer circumferential walls of the insulating female connector and the insulating male connector respectively. Two anti-rotation slots are radially opened on the inner walls of both ends of the drill rod body respectively. The insulating female connector and the insulating male connector are connected to the inner walls of both ends of the drill rod body by being locked in the anti-rotation slots through the anti-rotation lugs.

[0012] Two anti-rotation lugs are radially arranged on the outer circumferential wall of the insulating female connector and the insulating male connector, respectively. Each lug has an elastic retaining ring on the side near the drill pipe body port. The elastic retaining ring is engaged in the anti-rotation groove to prevent the insulating female connector and the insulating male connector from shifting.

[0013] Preferably, one end of the insulating conduit is threaded to the end of the insulating female connector, and the other end of the insulating conduit is slidably inserted into the end of the insulating male connector. The insulating male connector has a length compensation cavity reserved inside the insulating conduit.

[0014] Preferably, the inner walls of the insulating female connector and the insulating male connector are respectively embedded with two sealing rings, and the sealing rings are tightly fitted to the outer wall of the end of the insulating conduit; the outer circumferential wall of the tapered connector end of the insulating male connector is embedded with two sealing rings.

[0015] Preferably, a spring is installed at the end of the connector away from the signal line.

[0016] Preferably, a stabilizing wing is provided inside the drill pipe body, and an insulating conduit passes through the center of the stabilizing wing.

[0017] The beneficial effects of this utility model are:

[0018] This invention provides circumferential positioning of the insulating joint and the drill rod body to prevent damage to the drill rod and signal loss caused by the loosening of the insulating joint due to rotation.

[0019] Achieve axial positioning of the insulating joint to prevent signal loss caused by the insulating joint being pulled out;

[0020] This allows for the free axial elongation of the insulated conduit, preventing signal transmission damage or loss caused by thermal expansion and contraction leading to insulation joint failure or water ingress after the insulated conduit breaks. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0022] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram showing the connection between the signal line and the direct connector and the tapered connector in this utility model;

[0024] Figure 3 This is a schematic diagram of the anti-rotation clip structure in this utility model;

[0025] Figure 4 This is a schematic diagram showing the connection between the insulating female connector and the insulating male connector in this utility model. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0028] Please refer to Figure 1-4 A coal mine cable drill rod for preventing signal loss includes a drill rod body 1, an insulating female connector 2, an insulating conduit 3, and an insulating male connector 4;

[0029] An insulating female connector 2 is installed inside the drill pipe body 1 near the female connector, and an insulating male connector 4 is installed inside the drill pipe body 1 near the male connector. An insulating conduit 3 is inserted between the opposite ends of the insulating female connector 2 and the insulating male connector 4. A stabilizing wing 12 is provided inside the drill pipe body 1. The insulating conduit 3 passes through the center of the stabilizing wing 12. A straight head 5 and a tapered connector 6 are inserted into the opposite ends of the insulating female connector 2 and the insulating male connector 4. A signal line 7 is passed through the insulating conduit 3. The two ends of the signal line 7 pass through the insulating female connector 2 and the insulating male connector 4 respectively and are threaded to the straight head 5 and the tapered connector 6. A spring 11 is installed at the end of the straight head 5 away from the signal line 7.

[0030] Two anti-rotation lugs 24 are radially provided on the outer circumferential walls of the insulating female connector 2 and the insulating male connector 4, and two anti-rotation slots 13 are radially opened on the inner walls of both ends of the drill rod body 1. The insulating female connector 2 and the insulating male connector 4 are connected to the inner walls of both ends of the drill rod body 1 by being locked in the anti-rotation slots 13 through the anti-rotation lugs 24.

[0031] Two anti-rotation lugs 24 are radially arranged on the outer circumferential walls of the insulating female connector 2 and the insulating male connector 4, respectively. Each lug has an elastic retaining ring 8 on the side near the drill pipe body 1. The elastic retaining ring 8 is engaged in the anti-rotation groove 13 to prevent the insulating female connector 2 and the insulating male connector 4 from shifting. This prevents the insulating female connector 2 and the insulating male connector 4 from rotating relative to the drill pipe body 1 when connecting and disconnecting the drill pipe, thus preventing signal transmission problems caused by loosening due to the rotation of the insulating female connector 2 and the insulating male connector 4. The cooperation between the elastic retaining ring 8 and the anti-rotation groove 13 restricts the axial displacement of the insulating female connector 2 and the insulating male connector 4, preventing the axial force generated during connection and disconnection from pulling the connector off.

[0032] One end of the insulating conduit 3 is threaded to the end of the insulating female connector 2, and the other end of the insulating conduit 3 is slidably inserted into the end of the insulating male connector 4. The insulating male connector 4 is connected to the interior of the insulating conduit 3 and has a reserved length compensation cavity 41. The reserved length compensation cavity 41 ensures that the insulating conduit 3 will not exert axial tension or thrust on the insulating female connector 2 and the insulating male connector 4 after expansion or contraction, thus avoiding the risk of the insulating female connector 2, the insulating male connector 4, and the insulating conduit 3 being pulled apart.

[0033] Insulating female connector 2 and insulating male connector 4 are connected to the inner wall of insulating conduit 3, where two sealing rings 9 are embedded respectively. The sealing rings 9 fit tightly against the outer wall of the end of insulating conduit 3. Two sealing rings 10 are embedded on the outer circumferential wall of the tapered connector 6 at one end of insulating male connector 4. In use, when several drill pipe bodies 1 are connected in sequence, the insulating male connector 4 inside the drill pipe body 1 is connected to the insulating female connector 2 inside the connected drill pipe body 1 by threads in sequence. The sealing rings 9 and 10 keep the signal line 7 isolated from the outside of insulating conduit 3 and seal the drilling fluid.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A coal mine cable-operated drill rod for preventing signal loss, comprising a drill rod body (1), characterized in that, It also includes an insulating female connector (2), an insulating conduit (3), and an insulating male connector (4). An insulating female connector (2) is installed inside the drill pipe body (1) near the female connector, and an insulating male connector (4) is installed inside the drill pipe body (1) near the male connector. An insulating conduit (3) is inserted between the opposite ends of the insulating female connector (2) and the insulating male connector (4). A straight head (5) and a tapered head (6) are inserted into the opposite ends of the insulating female connector (2) and the insulating male connector (4). A signal wire (7) is threaded through the insulating conduit (3). The two ends of the signal wire (7) pass through the insulating female connector (2) and the insulating male connector (4) respectively and are threaded to the straight head (5) and the tapered head (6). Two anti-rotation lugs (24) are radially provided on the outer circumferential walls of the insulating female connector (2) and the insulating male connector (4). Two anti-rotation slots (13) are radially opened on the inner walls of both ends of the drill rod body (1). The insulating female connector (2) and the insulating male connector (4) are connected to the inner walls of both ends of the drill rod body (1) by being locked in the anti-rotation slots (13) through the anti-rotation lugs (24). Two anti-rotation catches (24) are radially arranged on the outer circumferential wall of the insulating female connector (2) and the insulating male connector (4). Each catches are provided with an elastic retaining ring (8) on the side near the end of the drill rod body (1). The elastic retaining ring (8) is engaged in the anti-rotation groove (13) to prevent the insulating female connector (2) and the insulating male connector (4) from displacement.

2. A coal mine cable-operated drill rod for preventing signal loss according to claim 1, characterized in that, One end of the insulating conduit (3) is threaded to the end of the insulating female connector (2), and the other end of the insulating conduit (3) is slidably inserted into the end of the insulating male connector (4). The insulating male connector (4) is connected to the inside of the insulating conduit (3) with a reserved length compensation cavity (41).

3. A coal mine cable-operated drill rod for preventing signal loss according to claim 2, characterized in that, The insulating female connector (2) and the insulating male connector (4) are connected to the inner wall of the insulating conduit (3) and two sealing rings (9) are embedded respectively. The sealing rings (9) are tightly fitted to the outer wall of the end of the insulating conduit (3). The insulating male connector (4) is installed with two sealing rings (10) on the outer circumferential wall of the tapered connector (6).

4. A coal mine cable-operated drill rod for preventing signal loss according to claim 1, characterized in that, A spring (11) is installed at the end of the direct connector (5) away from the signal line (7).

5. A coal mine cable-operated drill rod for preventing signal loss according to claim 1, characterized in that, The drill pipe body (1) is equipped with a stabilizing wing (12), and the insulating conduit (3) passes through the center of the stabilizing wing (12).

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