Cable-passing directional drill rod

Abstract

The utility model belongs to the technical field of drilling tools, and relates to a through cable directional drilling rod which comprises a drilling rod body, a through cable arranged in the drilling rod body, a cable plug pin and a cable socket, the cable plug pin and the cable socket are installed at the two ends of the through cable respectively, and the through cable is sleeved with a through cable protection sleeve. The cable plug pin is provided with an expansion type plug, the expansion type plug is deformed and shrunk along the radial direction under the action of external force, the outer diameter of the expansion type plug is larger than the inner diameter of the cable socket, and the expansion type plug can be inserted into the cable socket after being deformed and shrunk. The expansion type plug with the radial deformation design is adopted, the radial form of the expansion type plug can be automatically adjusted when the expansion type plug is inserted, then the distance caused by non-concentricity between the cable plug and the drill rod thread is compensated, and the problem of deformation damage caused by non-concentricity between the cable plug and the drill rod thread is solved; therefore, stable and reliable connection can be realized even under the condition of incomplete alignment, the service life of the directional drill rod is prolonged, and the operation stability of the directional drill rod is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of drill tools and relates to a through-cable directional drill pipe. Background Art

[0002] In the field of directional drilling technology in coal mines, as a core technical component, the performance and reliability of the through-cable directional drill pipe are directly related to the overall operation efficiency and safety. The main function of the through-cable directional drill pipe is to achieve effective connection between drill pipes and ensure that the internal through-cable can maintain an automatic, stable and reliable connection state to guarantee the continuity and stability of signal transmission.

[0003] Currently, in order to achieve precise docking of the through-cable plug during the screw thread engagement process of the drill pipe body, the existing technical solutions generally adopt a tapered spring plug design. This design aims to address the possible non-concentricity problem between the plug and the plug hole, hoping to automatically adjust and align during drill pipe connection to ensure smooth connection of the through-cable. However, in the actual application process, the tapered spring plug design has not completely solved the non-concentricity problem between the drill pipe thread and the through-cable plug. Due to the complexity and variability of the operating environment in coal mines, non-concentricity still occurs frequently under the action of various factors such as stress and vibration of the drill pipe. This not only causes the tapered spring plug to be easily deformed and damaged, but also further leads to unstable signal transmission, increased signal attenuation, and even signal interruption in extreme cases, seriously affecting the overall process and efficiency of directional drilling operations in coal mines.

[0004] In view of the above problems, the limitations of the existing technical solutions in dealing with the non-concentricity problem between the drill pipe thread and the through-cable plug are obvious. In view of the deficiencies in the existing technology, the present invention aims to provide an improved through-cable directional drill pipe in order to solve the non-concentricity problem between the drill pipe thread and the through-cable plug and ensure the smooth progress of directional drilling operations in coal mines. Content of the Utility Model

[0005] In view of this, the purpose of the present utility model is to provide a through-cable directional drill pipe, including a cable plug with radial self-adaptive deformation ability, to solve the problem of deformation and damage of the cable plug caused by non-concentricity between the drill pipe thread connection and the cable plug.

[0006] To achieve the above purpose, the present utility model provides the following technical solutions:

[0007] A through-cable directional drill pipe includes a drill pipe body, a through-cable arranged in the drill pipe body, a cable plug and a cable socket respectively installed at both ends of the through-cable, and a through-cable protective sleeve is sleeved on the through-cable;

[0008] The cable plug has an expandable plug which is deformed and reduced radially under the action of an external force. The outer diameter of the expandable plug is larger than the inner diameter of the cable socket, and the expandable plug can be inserted into the cable socket after being deformed and reduced.

[0009] Furthermore, the cable plug also has a cable plug body for connecting and fixing the through-cable, and the expandable plug is arranged at the top of the cable plug body.

[0010] Furthermore, the top of the expandable plug is a hollow sphere, and the lower part is a first hollow cylinder. The outer diameter of the first hollow cylinder is smaller than the outer diameter of the hollow sphere, and the expandable plug is integrally divided into multiple segments in the radial direction so that the expandable plug can be elastically deformed and reduced in the radial direction under the action of an external force.

[0011] Furthermore, the cable socket has a cable socket body for connecting and fixing the through-cable and a socket for inserting the expandable plug. The socket is a second hollow cylinder, and the inner diameter of the second hollow cylinder matches the outer diameter of the expandable plug so that the expandable plug can be inserted into the second hollow cylinder after being deformed and reduced.

[0012] Furthermore, the inner diameter of the second hollow cylinder is smaller than the outer diameter of the hollow sphere and larger than the outer diameter of the first hollow cylinder.

[0013] Furthermore, the inlet end face of the socket is set as a conical guiding surface, and the conical guiding surface faces the end of the cable socket close to the through-cable for guiding the insertion of the cable plug.

[0014] Furthermore, internal threads and external threads are respectively provided at both ends of the drill pipe body to realize the connection of multiple through-cable directional drill pipes by screwing the internal threads and the external threads together.

[0015] Furthermore, a connection seat is fixedly sleeved on the outside of the cable plug, and a connection head is fixedly sleeved on the outside of the cable socket, and the connection seat and the connection head are installed in the drill pipe body through a support device.

[0016] Furthermore, the support device includes a support ring and a locking mechanism. The connection seat is circumferentially fixedly connected to the drill pipe body through the support ring, and the connection head is circumferentially fixedly connected to the drill pipe body through the locking mechanism.

[0017] Furthermore, a non-circular hole insertion connection is adopted between the support ring and the connection seat so that a circumferential fixed connection is formed between the support ring and the connection seat. A radial protrusion is provided on the outside of the support ring to be embedded into the drill pipe body, and thus a circumferential fixed connection is formed between the support ring and the drill pipe body.

[0018] Inside the locking mechanism, there is a ratchet mechanism. The inner ring of the ratchet in the ratchet mechanism is inserted into the connecting head in a non-circular hole shape, so that a unilateral circumferential fixed connection is formed between the locking mechanism and the connecting head. A radial protrusion is provided on the outside of the locking mechanism and embedded into the drill pipe body, thereby forming a circumferential fixed connection between the locking mechanism and the drill pipe body.

[0019] The beneficial effects of the present utility model are as follows:

[0020] A through-cable directional drill pipe provided by the present utility model adopts an expandable plug with a radial deformation design, which can automatically adjust its radial shape during insertion, thereby compensating for the distance caused by the non-concentricity between the cable pin and the drill pipe thread, solving the problem of deformation damage caused by the non-concentricity between the cable pin and the drill pipe thread, ensuring a stable and reliable connection even in the case of incomplete alignment, and improving the service life and operation stability of the directional drill pipe.

[0021] Moreover, after the expandable plug deforms and shrinks and is inserted into the cable socket, it still maintains a certain elastic tension (expanding outward), so that the cable pin and the cable socket are closely fitted, further improving the stability of the cable pin and the cable socket.

[0022] Other advantages, objectives, and features of the present utility model will be described to some extent in the subsequent description, and to some extent, they will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the following description. Description of the Drawings

[0023] In order to make the objectives, technical solutions, and advantages of the present utility model clearer, the present utility model will be described in detail and preferably with reference to the accompanying drawings, where:

[0024] Figure 1 It is a schematic structural diagram of a through-cable directional drill pipe in Embodiment 1;

[0025] Figure 2 It is Figure 1 the cross-sectional structural diagram of A-A in

[0026] Figure 3 It is Figure 1 the cross-sectional structural diagram of B-B in

[0027] Figure 4 It is a schematic structural diagram of a cable pin in Embodiment 1;

[0028] Figure 5 It is a schematic structural diagram of a locking mechanism in Embodiment 2;

[0029] Figure 6 It is a schematic structural diagram of the locking mechanism in Embodiment 3.

[0030] Reference numerals: 1 - connecting seat; 2 - cable plug, 201 - hollow sphere; 202 - first hollow cylinder; 3 - through cable; 4 - through cable protective sleeve; 5 - drill pipe body; 6 - connector; 7 - cable socket; 8 - locking mechanism; 801 - ratchet mechanism; 802 - locking screw; 803 - locking cone; 804 - anti-rotation protrusion; 805 - biasing screw; 9 - support ring. Detailed implementation manners

[0031] The following uses specific specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present utility model. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0032] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and cannot be understood as a limitation to the present utility model; in order to better illustrate the embodiments of the present utility model, some components in the drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0033] In the drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] Embodiment 1

[0035] Please refer to Figures 1 to 4, is a coaxial directional drill pipe, including a drill pipe body 5, a coaxial cable 3 arranged in the drill pipe body 5, and a cable plug 2 and a cable socket 7 respectively fixedly installed at both ends of the coaxial cable 3. A connecting seat 1 is fixedly sleeved outside the cable plug 2, and a connecting head 6 is fixedly sleeved outside the cable socket 7;

[0036] The connecting seat 1 and the connecting head 6 are fixedly installed in the drill pipe body 5 through a support device. The support device includes a support ring 9 and a locking mechanism 8. The connecting seat 1 is fixedly connected to the drill pipe body 5 through the support ring 9, and the connecting head 6 is fixedly connected to the drill pipe body 5 through the locking mechanism 8.

[0037] The key point of this embodiment is that the cable plug 2 has a cable plug body for connecting and fixing the coaxial cable 3 and an expandable plug at the top (the end far from the coaxial cable 3) of the cable plug body. The top of the expandable plug is a hollow sphere 201, and the lower part is a first hollow cylinder 202. The outer diameter of the first hollow cylinder 202 is smaller than the outer diameter of the hollow sphere 201, and the expandable plug is integrally divided into multiple segments along the radial direction so that the expandable plug can be elastically deformed and reduced in the radial direction under the action of an external force;

[0038] The cable socket 7 has a cable socket body for connecting and fixing the coaxial cable 3 and a socket for inserting the expandable plug. The socket is a second hollow cylinder, and the inner diameter of the second hollow cylinder matches the outer diameter of the expandable plug so that the expandable plug can be inserted into the second hollow cylinder after being deformed and reduced;

[0039] Further, the inner diameter of the second hollow cylinder is smaller than the outer diameter of the hollow sphere 201 and larger than the outer diameter of the first hollow cylinder 202, and its inlet end face is set as a conical guiding surface, and the conical guiding surface faces the end of the cable socket 7 close to the coaxial cable 3 for guiding the insertion of the cable plug 2.

[0040] Specifically, the inner diameter of the second hollow cylinder is at least greater than or equal to the outer diameter of the hollow sphere 201 after extreme deformation and reduction to ensure that the expandable plug can be inserted into the socket after being deformed and reduced.

[0041] Specifically, the two ends of the drill pipe body 5 are respectively provided with internal threads and external threads to realize the connection of multiple coaxial directional drill pipes through the screwing of the internal threads and external threads. The cable plug 2 is in end-face contact with the cable socket 7. The top of the cable plug 2 is designed as a hollow sphere, and under the action of the conical guiding surface of the cable socket 7, the expandable plug will be deformed and reduced and inserted into the cable socket 7, still maintaining a certain elastic tension so that the cable plug 2 is closely attached to the cable socket 7;

[0042] Through holes serving as flow channels are provided in the support ring 9 and the locking mechanism 8 to facilitate the passage of the fluid in the drill pipe.

[0043] An interference fit is provided between the cable pin 2 and the connector base 1, and between the cable socket 7 and the connector head 6, so as to form a fixed connection. Both the connector base 1 and the connector head 6 are made of non-conductive materials, specifically rubber materials in this embodiment. This not only enables the connector base 1 and the connector head 6 to play an insulating role, but also further provides a relatively large adhesive force between the cable pin 2 and the connector base 1, and between the cable socket 7 and the connector head 6 on the basis of the interference fit, ensuring the stability of the connection.

[0044] The cable pin 2 is made of elastic metal material, which can have good elasticity while conducting electricity, thereby achieving good deformation reduction and expansion.

[0045] Further, one end of the connector base 1 close to the expansion plug has a clearance connection with the expansion plug and has a cavity for accommodating the connector head 6, so as to facilitate the insertion of the expansion plug into the cable socket 7. A conical guiding surface is provided at the entrance end face of this cavity to serve the purpose of guiding the connector head 6.

[0046] During the screwing process of the internal and external threads of the drill pipe body 5, the cable pin 2 and the cable socket 7 rotate relative to each other. Since the end faces of the cable socket 7 and the cable pin 2 are in frictional contact, the cable socket 7 and the cable pin 2 bear torque. To prevent the cable socket 7 and the cable pin 2 from rotating relative to their corresponding drill pipe body and components such as the through-cable, anti-rotation designs are provided on both the support device (support ring 9 and locking mechanism 8).

[0047] A non-circular hole insertion connection is adopted between the support ring 9 and the connector base 1, so as to form a circumferential fixed connection between the support ring 9 and the connector base 1. A radial protrusion is provided on the outer side of the support ring 9 to be embedded in the drill pipe body 5, and then the torque on the support ring 9 is transmitted to the drill pipe body 5 to form a circumferential fixed connection.

[0048] In another embodiment, a form in which a protrusion is provided on the support ring 9 to be embedded in the connector base 1 can also be adopted to achieve the circumferential fixed connection between the support ring 9 and the connector base 1.

[0049] A ratchet mechanism 801 is provided inside the locking mechanism 8. The non-circular hole of the inner ring of the ratchet in the ratchet mechanism 801 is inserted into the connector head 6, so as to form a unilateral circumferential fixed connection between the locking mechanism 8 and the connector head 6. A radial protrusion is provided on the outside of the locking mechanism 8 to be embedded in the drill pipe body 5, and then the torque on the locking mechanism 8 is transmitted to the drill pipe body 5 to form a circumferential fixed connection.

[0050] Specifically, snap rings or shoulders are provided on both sides of the support ring 9 and the locking mechanism 8 to achieve the axial fixed connection between the support ring 9 and the locking mechanism 8 and the drill pipe body.

[0051] Further, a cable protection sleeve 4 sleeved on the through-cable 3 is also provided between the connecting seat 1 and the connecting head 6 to protect the through-cable 3; specifically, the cable protection sleeve 4 is threadedly connected to the connecting seat 1 and the connecting head 6.

[0052] Further, sealing rings are provided at the joints of the cable protection sleeve 4 with the connecting seat 1 and the connecting head 6 to play a sealing role.

[0053] Further, a sealing ring is provided at the joint of the connecting head 6 and the connecting seat 1 to prevent the flow in the drill pipe body from entering the cable socket 7 or the cable pin 2 from the ends of the connecting head 6 and the connecting seat 1.

[0054] Embodiment 2

[0055] Please refer to Figure 5 , the difference between this embodiment and Embodiment 1 is that in this embodiment, there is no ratchet mechanism inside the locking mechanism 8. Instead, an anti-rotation protrusion 804 arranged axially and embedded in the connecting head 6 is provided on one side of the locking mechanism 8, and a groove corresponding to the anti-rotation protrusion 804 is provided on the connecting head 6, so as to form a circumferential fixed connection between the locking mechanism 8 and the connecting head 6. A locking cone 803 that slides radially is provided outside the locking mechanism 8, and a locking screw 802 that cooperates with the locking cone 803 is provided on the locking mechanism 8. By tightening the locking screw 802, the locking cone 803 is pushed out radially from the locking mechanism 8, so that the locking cone 803 abuts against the inner wall of the drill pipe body 5 to realize the locking of the locking mechanism 8 and the drill pipe body 5.

[0056] Embodiment 3

[0057] Please refer to Figure 6 , the difference between this embodiment and Embodiment 1 is that in this embodiment, there is no ratchet mechanism inside the locking mechanism 8. Instead, an anti-rotation protrusion 804 arranged axially and embedded in the connecting head 6 is provided on one side of the locking mechanism 8, and a groove corresponding to the anti-rotation protrusion 804 is provided on the connecting head 6, so as to form a circumferential fixed connection between the locking mechanism 8 and the connecting head 6. An eccentric screw 805 is provided at the edge of one side of the locking mechanism 8, so that the end face of the screw after the eccentric screw 805 is screwed in abuts against the inner wall of the drill pipe body 5 to realize the locking of the locking mechanism 8 and the drill pipe body 5.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A cable directional drilling rod, characterized in that: It comprises a drill rod body, a cable arranged in the drill rod body, and a cable plug and a cable socket respectively installed at both ends of the cable, and a cable protective cover is sleeved on the cable; The cable plug has an expansion plug, which is deformed and shrunk radially under the action of external force, the outer diameter of the expansion plug is larger than the inner diameter of the cable socket, and the expansion plug can be inserted into the cable socket after deformation and shrinkage.

2. The cable directional drilling rod according to claim 1, characterized in that: The cable plug also has a cable plug body for connecting and fixing the through cable, and the expansion plug is arranged on the top of the cable plug body.

3. The cable-through directional drilling rod according to claim 1, characterized in that: The top of the expansion plug is a hollow sphere, and the lower part is a first hollow cylinder. The outer diameter of the first hollow cylinder is smaller than the outer diameter of the hollow sphere, and the expansion plug is divided into multiple sections along the radial direction as a whole, so that the expansion plug can be elastically deformed and shrunk in the radial direction under the action of external force.

4. The cable-through directional drilling rod according to claim 3, characterized in that: The cable socket comprises a cable socket body for connecting and fixing a cable and a socket for inserting an expansion plug. The socket is a second hollow cylinder, and the inner diameter of the second hollow cylinder matches the outer diameter of the expansion plug so that the expansion plug can be inserted into the second hollow cylinder after being deformed and shrunk.

5. The cable-through directional drilling rod according to claim 4, characterized in that: The inner diameter of the second hollow cylinder is smaller than the outer diameter of the hollow sphere, and larger than the outer diameter of the first hollow cylinder.

6. The cable-through directional drilling rod according to claim 4, characterized in that: The inlet end surface of the socket is set as a tapered guide surface, and the tapered guide surface faces the end of the cable socket close to the cable passing through, so as to guide the insertion of the cable plug.

7. The cable-through directional drilling rod according to claim 1, characterized in that: The two ends of the drill rod body are respectively provided with an internal thread and an external thread, so as to realize the connection of multiple cable-through directional drill rods by screwing the internal thread and the external thread.

8. The cable-through directional drilling rod according to claim 1, characterized in that: A connecting seat is arranged on the outer fixing sleeve of the cable plug, a connecting head is arranged on the outer fixing sleeve of the cable socket, and the connecting seat and the connecting head are installed in the drill rod body through a supporting device.

9. The cable-through directional drilling rod according to claim 8, characterized in that: The supporting device comprises a supporting ring and a locking mechanism. The connecting seat is circumferentially fixedly connected to the drill rod body via the supporting ring, and the connecting head is circumferentially fixedly connected to the drill rod body via the locking mechanism.

10. The cable-through directional drilling rod according to claim 9, characterized in that: The support ring and the connection seat are connected by inserting a non-circular hole, so that a circumferential fixed connection is formed between the support ring and the connection seat. A radial protrusion is provided on the outer side of the support ring to embed into the drill pipe body, thereby forming a circumferential fixed connection between the support ring and the drill pipe body. A ratchet mechanism is provided inside the locking mechanism, and the inner ring of the ratchet in the ratchet mechanism is inserted into the connecting head in a non-circular hole shape, so that a unilateral circumferential fixed connection is formed between the locking mechanism and the connecting head. A radial protrusion is provided on the outer side of the locking mechanism and embedded in the drill rod body, thereby forming a circumferential fixed connection between the locking mechanism and the drill rod body.

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