CN119083911A - Internal expansion cable directional drilling rod - Google Patents

Abstract

The present invention belongs to the technical field of drilling tools, and relates to an internal expansion type cable directional drill pipe, comprising a drill pipe body, a cable arranged in the drill pipe body, and a cable plug and a cable socket respectively installed at both ends of the cable; the cable plug has an expansion plug, and the expansion plug is deformed and reduced in the radial direction under the action of an external force, and 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 reduction. The present invention adopts an expansion plug with a radial deformation design, which can automatically adjust its radial shape when inserted, thereby compensating for the distance caused by the non-concentricity between the cable plug and the drill pipe thread, solving the problem of deformation damage caused by the non-concentricity between the cable plug 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.

Description

Internal expansion type cable directional drill rod

Technical Field

The invention belongs to the technical field of drilling tools, and relates to an internal expansion type cable-through directional drill rod.

Background

In the technical field of underground directional drilling of coal mines, a cable directional drill rod is used as a core technical component, and the performance and the reliability of the cable directional drill rod are directly related to the overall operation efficiency and the safety. The main function of the cable-through directional drill rod is to realize effective connection among the drill rods and ensure that an internal cable can keep an automatic, stable and reliable connection state so as to ensure the continuity and stability of signal transmission.

Currently, in order to achieve accurate butt joint of the cable plug pin in the threaded screwing process of the drill rod body, the prior art scheme generally adopts a spring plug pin design with taper. The design aims to solve the possible non-concentricity problem of the bolt and the pin hole, so that the automatic adjustment and alignment can be realized when the drill rod is connected, and smooth connection of the cable is ensured. However, in practical applications, the tapered spring bolt design does not completely address the issue of non-concentricity between the drill pipe threads and the cable bolt. Due to the complexity and the variability of the underground operation environment of the coal mine, the phenomenon of non-concentricity of the drill rod still occurs under the action of various factors such as stress, vibration and the like. The conical spring bolt is easy to deform and damage, unstable signal transmission is further caused, signal attenuation is aggravated, signal interruption is caused even in extreme cases, and the whole flow and efficiency of underground directional drilling operation of a coal mine are seriously influenced.

In view of the above, the limitations of the prior art solutions in dealing with the problem of the drill pipe threads being non-concentric with the cable bolt are apparent. Aiming at the defects in the prior art, the invention aims to provide an improved cable-passing directional drill rod so as to solve the problem of non-concentricity between the threads of the drill rod and a cable-passing bolt and ensure the smooth running of underground directional drilling operation of a coal mine.

Disclosure of Invention

Accordingly, the present invention is directed to an inner expansion type cable directional drill rod, which includes a cable bolt with a radial adaptive deformation capability, so as to solve the problem of deformation and damage of the cable bolt caused by non-concentricity between the threaded connection of the drill rod and the cable bolt.

In order to achieve the above purpose, the present invention provides the following technical solutions:

The utility model provides an interior inflation formula leads to cable directional drilling rod, includes the drilling rod body, arranges the cable in the drilling rod body and installs cable bolt and the cable socket at leading to cable both ends respectively, the cable bolt has inflation formula plug, inflation formula plug radially warp under the exogenic action and dwindle, the external diameter of inflation formula plug is greater than the internal diameter of cable socket, just inflation formula plug can insert in the cable socket after warp and dwindle.

Further, the cable bolt is also provided with a cable bolt body for connecting and fixing a cable, and the expansion type plug is arranged at the top of the cable bolt body;

The top of expansion type plug is hollow sphere, and the lower part is first hollow cylinder, and the external diameter of first hollow cylinder is less than hollow sphere's external diameter, just expansion type plug wholly cuts apart into the multistage along radial direction to make expansion type plug can be radial elastic deformation and reduce under the exogenic action.

Further, the cable socket is provided with a cable socket body for connecting and fixing a cable and a socket for inserting an expansion type plug, the socket is a second hollow cylinder, and the inner diameter of the second hollow cylinder is matched with the outer diameter of the expansion type plug, so that the expansion type plug can be inserted into the second hollow cylinder after being deformed and contracted.

Further, 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.

Further, the inlet end face of the socket is provided with a conical guide surface, and the conical guide surface faces towards one end of the cable socket, which is close to the cable, so as to be used for guiding insertion of the cable bolt.

Further, the two ends of the drill rod body are respectively provided with an internal thread and an external thread, so that the connection of a plurality of cable-through directional drill rods is realized through screwing of the internal thread and the external thread.

Further, a connecting seat is fixedly sleeved on the outer side of the cable bolt, a connector is fixedly sleeved on the outer side of the cable socket, and the connecting seat and the connector are installed in the drill rod body through a supporting device.

Further, the supporting device comprises a supporting ring and a locking mechanism, the connecting seat is fixedly connected with the circumference of the drill rod body through the supporting ring, and the connecting head is fixedly connected with the circumference of the drill rod body through the locking mechanism.

Further, the supporting ring is inserted and connected with the connecting seat through a non-circular hole, so that a circumferential fixed connection is formed between the supporting ring and the connecting seat, radial protrusions are arranged on the outer side of the supporting ring to be embedded into the drill rod body, and the circumferential fixed connection is formed between the supporting ring and the drill rod body

The locking mechanism is internally provided with a ratchet mechanism, the inner ring of the ratchet wheel in the ratchet mechanism is inserted into the connector in a non-circular hole shape, so that a single-side circumferential fixed connection is formed between the locking mechanism and the connector, the outer side of the locking mechanism is provided with a radial protrusion embedded into the drill rod body, and further, the circumferential fixed connection is formed between the locking mechanism and the drill rod body.

Further, an anti-rotation protrusion which is axially arranged and embedded in the connector is arranged on one side of the locking mechanism, a groove corresponding to the anti-rotation protrusion is formed in the connector, so that the locking mechanism and the connector are fixedly connected in the circumferential direction, a locking cone block which slides in the radial direction is arranged on the outer side of the locking mechanism, and a locking screw matched with the locking cone block is arranged on the locking mechanism, so that the locking cone block can be abutted to the locking mechanism in the radial direction through tightening of the locking screw, the locking cone block is abutted to the inner wall of the drill rod body, and locking of the locking mechanism 8 and the drill rod body is achieved.

The invention has the beneficial effects that:

According to the internal expansion type cable guiding directional drill rod, the expansion type plug with the radial deformation design is adopted, the radial shape of the internal expansion type cable guiding directional drill rod can be automatically adjusted during insertion, so that the distance caused by the non-concentricity between the cable bolt and the thread of the drill rod is compensated, the problem of deformation damage caused by the non-concentricity between the cable bolt and the thread of the drill rod is solved, stable and reliable connection can be realized even under the condition of incomplete alignment, and the service life and the operation stability of the directional drill rod are improved.

And after the cable bolt is deformed and contracted to be inserted into the cable socket, certain elastic tension (outwards expansion) is still kept, so that the cable bolt is tightly attached to the cable socket, and the stability of the cable bolt and the cable socket is further improved.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of an inner expansion type cable directional drill rod according to embodiment 1;

FIG. 2 is a schematic cross-sectional view of A-A in FIG. 1;

FIG. 3 is a schematic cross-sectional view of B-B in FIG. 1;

FIG. 4 is a schematic view of the cable plug in embodiment 1;

FIG. 5 is a schematic view of the locking mechanism in embodiment 2;

Fig. 6 is a schematic structural view of a locking mechanism in embodiment 3.

The reference numerals comprise a 1-connecting seat, a 2-cable bolt, a 201-hollow sphere, a 202-first hollow cylinder, a 3-cable, a 4-cable protection sleeve, a 5-drill rod body, a 6-connector, a 7-cable socket, an 8-locking mechanism, a 801-ratchet mechanism, an 802-locking screw, a 803-locking cone block, a 804-anti-rotation protrusion, a 805-deflection screw and a 9-support ring.

Detailed Description

Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.

In which the drawings are for illustrative purposes only and are not intended to be construed as limiting the invention, and in which certain elements of the drawings may be omitted, enlarged or reduced in order to better illustrate embodiments of the invention, and not to represent actual product dimensions, it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

In the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., the directions or positional relationships indicated are based on the directions or positional relationships shown in the drawings, only for convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred devices or elements must have a specific direction, be constructed and operated in a specific direction, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present invention, and that the specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.

Example 1

Referring to fig. 1-4, an internal expansion type cable guiding drill rod comprises a drill rod body 5, a cable 3 arranged in the drill rod body 5, and a cable bolt 2 and a cable socket 7 which are respectively and fixedly installed at two ends of the cable 3, wherein a connecting seat 1 is fixedly sleeved on the outer side of the cable bolt 2, and a connector 6 is fixedly sleeved on the outer side of the cable socket 7;

The connecting seat 1 and the connecting head 6 are fixedly installed in the drill rod body 5 through a supporting device, the supporting device comprises a supporting ring 9 and a locking mechanism 8, the connecting seat 1 is fixedly connected with the drill rod body 5 through the supporting ring 9, and the connecting head 6 is fixedly connected with the drill rod body 5 through the locking mechanism 8.

The key point of this embodiment is that the cable plug 2 is provided with a cable plug body for connecting and fixing the cable 3 and an expansion plug located at the top of the cable plug body (the end far away from the cable 3), the top of the expansion plug is a hollow sphere 201, the lower part of the expansion plug is a first hollow cylinder 202, the outer diameter of the first hollow cylinder 202 is smaller than that of the hollow sphere 201, and the expansion plug is wholly divided into a plurality of sections along the radial direction, so that the expansion plug can be elastically deformed and contracted in the radial direction under the action of external force;

The cable socket 7 is provided with a cable socket body for connecting and fixing the cable 3 and a socket for inserting the expansion type plug, the socket is a second hollow cylinder, and the inner diameter of the second hollow cylinder is matched with the outer diameter of the expansion type plug so that the expansion type plug can be inserted into the second hollow cylinder after being deformed and contracted;

Further, the second hollow cylinder has an inner diameter smaller than the outer diameter of the hollow sphere 201 and larger than the outer diameter of the first hollow cylinder 202, and has an inlet end surface as a tapered guide surface facing the end of the cable socket 7 near the cable 3 for guiding insertion of the cable plug 2.

Specifically, the inner diameter of the second hollow cylinder is at least equal to or greater than the outer diameter of the hollow sphere 201 which is deformed and reduced to ensure that the expansion type plug can be inserted into the socket after being deformed and reduced.

Specifically, the two ends of the drill rod body 5 are respectively provided with an internal thread and an external thread, so that connection of a plurality of cable guide drill rods is realized through screwing of the internal thread and the external thread, the cable bolt 2 is in contact with the end surface of the cable socket 7, the top of the cable bolt 2 is in a hollow spherical design, and under the action of a conical guide surface of the cable socket 7, the expansion type plug can deform and shrink to be inserted into the cable socket 7, and certain elastic tension is still maintained, so that the cable bolt 2 is tightly attached to the cable socket 7;

through holes are provided in the support ring 9 and the locking mechanism 8 as flow channels for the passage of fluid in the drill rod.

The cable bolt 2 is connected with the connecting seat 1 in an interference manner, and the cable socket 7 is connected with the connector 6 in an interference manner, so that fixed connection is formed between the cable bolt 2 and the connecting seat 1, and the connecting seat 1 and the connector 6 are made of non-conductive materials.

The cable bolt 2 is made of elastic metal material, and has good elasticity while conducting electricity, so that good deformation shrinkage and expansion are realized.

Further, one end of the connecting seat 1, which is close to the expansion plug, is in clearance connection with the expansion plug, and is provided with a cavity for accommodating the connector 6, so that the expansion plug is conveniently inserted into the cable socket 7, and a conical guide surface is arranged at the inlet end face of the cavity, so that the purpose of guiding the connector 6 is achieved.

The internal thread and the external thread of the drill rod body 5 are in the screwing process, the cable bolt 2 and the cable socket 7 relatively rotate, and because the end faces of the cable socket 7 and the cable bolt 2 are in friction contact, the cable socket 7 and the cable bolt 2 bear torque, and in order to avoid the relative rotation of the cable socket 7 and the cable bolt 2 and the corresponding drill rod body, the cable and other parts, the support device (the support ring 9 and the locking mechanism 8) is provided with an anti-rotation design.

The supporting ring 9 is inserted into the connecting seat 1 through a non-circular hole, so that a circumferential fixed connection is formed between the supporting ring 9 and the connecting seat 1, radial protrusions are arranged on the outer side of the supporting ring 9 to be embedded into the drill rod body 5, and torque on the supporting ring 9 is transmitted to the drill rod body 5 to form the circumferential fixed connection.

In a further embodiment, the circumferential fixed connection between the support ring 9 and the connection socket 1 can also be realized in the form of a protrusion embedded in the connection socket 1 provided on the support ring 9.

The inside ratchet mechanism 801 that is equipped with of locking mechanical system 8, the inner circle non-round hole shape of ratchet in the ratchet mechanism 801 inserts connector 6 to make locking mechanical system 8 with form unilateral circumference fixed connection between the connector 6, locking mechanical system 8's outside is equipped with radial protruding embedding to drilling rod body 5, and then gives drilling rod body 5 with the moment of torsion on the locking mechanical system 8, in order to form circumference fixed connection.

Specifically, two sides of the supporting ring 9 and the locking mechanism 8 are respectively provided with a clamping ring or a shaft shoulder so as to realize the axial fixed connection of the supporting ring 9 and the locking mechanism 8 with the drill rod body.

Further, a cable protection sleeve 4 sleeved on the cable 3 is further arranged between the connecting seat 1 and the connector 6 to protect the cable 3, and specifically, the cable protection sleeve 4 is in threaded connection with the connecting seat 1 and the connector 6.

Further, sealing rings are arranged at the joints of the cable protection sleeve 4, the connecting seat 1 and the connecting head 6, so as to play a role in sealing.

Further, a sealing ring is arranged at the joint of the connector 6 and the connecting seat 1, so as to prevent the flow in the drill rod body from entering the cable socket 7 or the cable plug 2 from the end of the connector 6 and the connecting seat 1.

Example 2

Referring to fig. 5, the difference between this embodiment and embodiment 1 is that in this embodiment, the locking mechanism 8 has no ratchet mechanism inside, but an anti-rotation protrusion 804 axially disposed on one side of the locking mechanism 8 and embedded in the connector 6 is provided, and a groove corresponding to the anti-rotation protrusion 804 is provided on the connector 6, so that a circumferential fixed connection is formed between the locking mechanism 8 and the connector 6, a locking cone 803 sliding along a radial direction is provided on an outer side of the locking mechanism 8, and a locking screw 802 matching with the locking cone 803 is provided on the locking mechanism 8, so that the locking cone 803 abuts against the locking mechanism 803 along a radial direction by screwing the locking screw 802, and the locking of the locking mechanism 8 and the drill rod body 5 is achieved.

Example 3

Referring to fig. 6, the difference between the present embodiment and embodiment 1 is that in the present embodiment, the locking mechanism 8 has no ratchet mechanism inside, but an anti-rotation protrusion 804 axially disposed on one side of the locking mechanism 8 and embedded in the connecting head 6 is provided, and a groove corresponding to the anti-rotation protrusion 804 is provided on the connecting head 6, so that a circumferential fixed connection is formed between the locking mechanism 8 and the connecting head 6, and an eccentric screw 805 is provided on an edge of one side of the locking mechanism 8, so that an end face of the screw screwed by the eccentric screw 805 abuts against an inner wall of the drill rod body 5, thereby locking the locking mechanism 8 and the drill rod body 5.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.

Claims (10)

1. An internally expandable cable-type directional drill rod, characterized in that it comprises a drill rod body, a cable arranged in the drill rod body, and a cable pin and a cable socket respectively installed at both ends of the cable, wherein the cable pin has an expandable plug, and the expandable plug is deformed and reduced in radial direction 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. 2. The internal expansion type 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 cable, and the expansion plug is arranged on the top of the cable plug body; 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. 3. The internally expandable cable directional drill rod according to claim 2 is characterized in that the cable socket has a cable socket body for connecting and fixing the cable and a socket for inserting an expandable plug, and 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 shrunk. 4. The internally expandable cable-type directional drilling rod according to claim 3, 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. 5. The internally expandable cable-carrying directional drill rod according to claim 3 is characterized in that the inlet end face of the socket is set as a conical guide surface, and the conical guide surface faces the end of the cable socket close to the cable to guide the insertion of the cable pin. 6. The internally expandable cable-through directional drill rod according to claim 1 is characterized in that: both ends of the drill rod body are respectively provided with internal threads and external threads, so that the connection of multiple cable-through directional drill rods can be achieved by screwing the internal threads and the external threads together. 7. The internally expandable cable-through directional drill rod according to claim 1 is characterized in that a connecting seat is provided on the outer fixing sleeve of the cable pin, a connecting head is provided 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. 8. The internally expandable cable directional drill rod according to claim 7 is characterized in that: the supporting device includes a supporting ring and a locking mechanism, the connecting seat is circumferentially fixedly connected to the drill rod body through the supporting ring, and the connecting head is circumferentially fixedly connected to the drill rod body through the locking mechanism. 9. The internally expandable cable-type directional drill rod according to claim 8 is characterized in that: the support ring and the connecting seat are connected by a non-circular hole insertion connection, so that a circumferential fixed connection is formed between the support ring and the connecting seat, and a radial protrusion is provided on the outer side of the support ring to be embedded in the drill rod body, thereby forming a circumferential fixed connection between the support ring and the drill rod body; a ratchet mechanism is provided inside the locking mechanism, and the inner ring of the ratchet in the ratchet mechanism is non-circularly hole-shaped and inserted into the connecting head, 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 to be embedded in the drill rod body, thereby forming a circumferential fixed connection between the locking mechanism and the drill rod body. 10. The cable-through directional drill rod according to claim 8 is characterized in that: an anti-rotation protrusion is provided on one side of the locking mechanism and is arranged axially and embedded in the connecting head, and a groove corresponding to the anti-rotation protrusion is provided on the connecting head, so that a circumferential fixed connection is formed between the locking mechanism and the connecting head, a locking cone block which slides radially is provided on the outer side of the locking mechanism, and a locking screw which cooperates with the locking cone block is provided on the locking mechanism, so that the locking cone block can be pushed radially out of the locking mechanism by tightening the locking screw, so that the locking cone block is pressed against the inner wall of the drill rod body, so as to realize the locking of the locking mechanism 8 and the drill rod body.