A vector connector for underground multi-well convergence

Abstract

This invention discloses a vector joint for underground multi-well convergence, relating to the fields of mechanical engineering or drilling engineering technology. It includes a butt joint, a safety pull-out female sleeve, a safety pull-out male sleeve, a vector ball head, a vector joint sleeve, a torque limiting screw, and a vector joint connecting sleeve. The butt joint is connected to one end of the safety pull-out female sleeve, the other end of which is connected to one end of the safety pull-out male sleeve, and the other end of the safety pull-out male sleeve is connected to one end of the vector ball head. The other end of the vector ball head has a spherical structure and extends into the vector joint sleeve. The vector joint sleeve contains a spherical cavity that mates with the spherical structure of the vector ball head. One end of the vector joint sleeve is connected to the vector joint connecting sleeve, and one end of the vector joint connecting sleeve has an arc-shaped groove that mates with the spherical structure. The front end of the vector joint is movable, reducing the difficulty of directional well construction. If the butt joint gets stuck, the safety pull-out sleeve pin can be broken off, allowing the rear drill string to be pulled out, minimizing losses.

Description

Technical Field

[0001] This invention relates to the fields of mechanical engineering or drilling engineering, and in particular to a vector joint for underground multi-well convergence. Background Technology

[0002] In the process of connecting multiple wells underground, it is necessary not only to connect the main vertical well with the directional well, but also to complete the connection and seal it. Currently, there are two main methods for connecting underground pipelines: one is a direct-insertion connection similar to a quick-connect coupling, and the other is a conventional screw-lock connection. However, regardless of the connection method, the construction precision requirements for the directional well are extremely high. The directional wellbore must be aligned with the target point of the vertical well without any deviation. This is a huge challenge for the construction of directional wells, and once a deviation occurs during the operation of the directional well, it will render the directional well unusable as a connection well, wasting time and money.

[0003] The existing technologies have the following problems during the docking process:

[0004] 1. The current docking requires extremely high precision during directional well construction, which makes directional well construction very difficult;

[0005] 2. Once an error occurs, the directional well will be unusable as a docking well, wasting time and money;

[0006] 3. If the docking fails and the docking point cannot be sealed, but the docking joint is stuck to the target itself, the drill bit and casing cannot be recovered, resulting in waste. Summary of the Invention

[0007] To address the above technical problems, this invention provides a vector connector for underground multi-well convergence, which reduces the difficulty of docking and saves construction time and costs.

[0008] To achieve the above objectives, the present invention provides the following solution:

[0009] This invention provides a vector connector for underground multi-well convergence, comprising a butt joint, a safety pull-out female sleeve, a safety pull-out male sleeve, a vector ball head, a vector connector sleeve, a torque limiting screw, and a vector connector connecting sleeve. The butt joint is connected to one end of the safety pull-out female sleeve, the other end of the safety pull-out female sleeve is connected to one end of the safety pull-out male sleeve, the other end of the safety pull-out male sleeve is connected to one end of the vector ball head, the other end of the vector ball head is a spherical structure, and the other end of the vector ball head extends into the vector connector sleeve. The vector connector sleeve contains a spherical cavity that mates with the spherical structure of the vector ball head. The vector connector sleeve is connected to one end of the vector connector connecting sleeve, and one end of the vector connector connecting sleeve is provided with an arc-shaped groove that mates with the spherical structure.

[0010] Optionally, it also includes a shear pin, which penetrates the side wall of the safety pull-out sleeve and connects to the outer wall of the safety pull-out sleeve.

[0011] Optionally, the inner wall of the other end of the safety pull female sleeve is a hexagonal structure, the outer wall of one end of the safety pull male sleeve is a hexagonal structure, and a groove is provided at the apex corner of the hexagonal structure of the safety pull male sleeve, into which the shear pin extends.

[0012] Optionally, the spherical structure of the vector ball head is provided with multiple torque transmission grooves, and the torque limiting screw extends into the torque transmission grooves after passing through the vector connector sleeve.

[0013] Optionally, the vector connector sleeve and the vector connector connecting sleeve are connected by multiple bolts.

[0014] Optionally, a dustproof rubber is provided in the gap between the vector ball head and the vector connector sleeve, and the dustproof rubber is connected to the vector ball head and the vector connector sleeve by vulcanization or binding.

[0015] Optionally, sealing rings are provided between the mating joint and the safety pull-out female sleeve, between the safety pull-out female sleeve and the safety pull-out male sleeve, between the safety pull-out male sleeve and the vector ball head, and between the vector joint sleeve and the vector joint connecting sleeve.

[0016] Optionally, a sleeve buckle is provided on the inner wall of the other end of the vector connector connecting sleeve, and the sleeve buckle is used to connect with the sleeve.

[0017] The present invention achieves the following technical effects compared to the prior art:

[0018] 1. The front end of the vector connector can move within a small range. When there is a certain deviation in the directional well construction, the connector will automatically align and insert after entering the flared opening at the docking point, and the docking will be successful. This reduces the difficulty of directional well construction, saves time and costs, and can also reduce the number of abandoned wells, thus saving costs.

[0019] 2. The joint is equipped with a safety pull-out sleeve structure. If the seal fails but the joint is stuck and cannot be pulled out, the pin at the safety pull-out sleeve can be broken off, and all the drill bits behind the safety pull-out sleeve can be pulled out to reduce losses. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the AA cross-sectional structure of the vector connector used for underground multi-well convergence according to the present invention;

[0022] Figure 2 This is a schematic diagram of the vector connector for underground multi-well convergence according to the present invention;

[0023] Figure 3 This is a schematic diagram of the cross-section of the safety pull-out sleeve in the vector joint for underground multi-well convergence according to the present invention;

[0024] Figure 4 This is a three-dimensional structural schematic diagram of the safety pull-out sleeve in the vector joint for underground multi-well convergence according to the present invention;

[0025] Figure 5 This is a three-dimensional structural schematic diagram of the safety pull-out male sleeve in the vector joint for underground multi-well convergence according to the present invention;

[0026] Figure 6 This is a three-dimensional structural diagram of the vector ball head in the vector joint used for underground multi-well convergence according to the present invention.

[0027] Explanation of reference numerals in the attached drawings: 1. Butt joint; 2. Safety pull-out female sleeve; 3. Shear pin; 4. Safety pull-out male sleeve; 5. Vector ball head; 6. Dustproof rubber; 7. Vector joint sleeve; 8. Torque limiting screw; 9. Bolt; 10. Vector joint connecting sleeve. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1 to 6As shown, this embodiment provides a vector joint for underground multi-well convergence, including a butt joint 1, a safety pull-out female sleeve 2, a safety pull-out male sleeve 4, a vector ball head 5, a vector joint sleeve 7, a torque limiting screw 8, and a vector joint connecting sleeve 10; the butt joint 1 is connected to one end of the safety pull-out female sleeve 2, the other end of the safety pull-out female sleeve 2 is connected to one end of the safety pull-out male sleeve 4, the other end of the safety pull-out male sleeve 4 is connected to one end of the vector ball head 5, the other end of the vector ball head 5 is a spherical structure, the other end of the vector ball head 5 extends into the vector joint sleeve 7, the vector joint sleeve 7 is a spherical cavity that matches the spherical structure of the vector ball head 5, the vector joint sleeve 7 is connected to one end of the vector joint connecting sleeve 10, and one end of the vector joint connecting sleeve 10 is provided with an arc-shaped groove that matches the spherical structure.

[0030] Since the vector ball head 5 and the vector connector sleeve 7 are in spherical contact, the vector ball head 5 can rotate relative to the vector connector sleeve 7 to a certain extent. Therefore, the front end of the vector connector can move within a small range. When there is a certain deviation in the directional well construction, it can be automatically aligned and inserted after entering the docking point through the connector, and the docking is successful. This reduces the difficulty of directional well construction, saves time and costs, and can also reduce the number of abandoned wells, thus saving costs.

[0031] In this specific embodiment, the butt joint 1 is threaded to one end of the safety pull-out female sleeve 2. The other end of the safety pull-out female sleeve 2 is plugged into one end of the safety pull-out male sleeve 4. The other end of the safety pull-out male sleeve 4 is threaded to one end of the vector ball head 5.

[0032] The vector joint used for underground multi-well convergence also includes a shear pin 3, which penetrates the side wall of the safety pull-out sleeve 2 and connects to the outer wall of the safety pull-out sleeve 4. If the butt joint seal fails but the butt joint 1 is stuck, the shear pin 3 at the safety pull-out sleeve can be pulled out, and all drill bits at the rear of the safety pull-out sleeve 2 can be pulled out, saving costs.

[0033] In a more specific embodiment, the inner wall of the other end of the safety pull-out female sleeve 2 is hexagonal, and the outer wall of one end of the safety pull-out male sleeve 4 is hexagonal. A groove is provided at the apex of the hexagonal structure of the safety pull-out male sleeve 4, and the shear pin 3 extends into the groove. The hexagonal structure enables torque transmission between the safety pull-out female sleeve 2 and the safety pull-out male sleeve 4. The shear pin 3 prevents the safety pull-out female sleeve from separating from the safety pull-out male sleeve. If docking fails and the drill string needs to be lifted, but the docking point is stuck and cannot be lifted, force can be applied to shear the shear pin and remove the drill string from the well.

[0034] The vector ball head 5 has six torque transmission grooves on its spherical structure. The torque limiting screw 8 is threadedly connected to the vector connector sleeve 7. The torque limiting screw 8 passes through the vector connector sleeve 7 and extends into the torque transmission groove. The torque transmission groove gradually increases in size from the bottom to the opening, allowing the bottom of the torque limiting screw 8 to move within a certain range within the groove, thereby enabling the vector ball head 5 to rotate at a certain angle relative to the vector connector sleeve 7.

[0035] The vector connector sleeve 7 and the vector connector connecting sleeve 10 are connected by multiple bolts 9. More specifically, multiple bolt holes 9 are provided axially on the outer side wall of the vector connector connecting sleeve 10, and multiple threaded holes are uniformly provided circumferentially on the end face of the vector connector sleeve 7. The threaded holes match the bolt holes 9. By screwing the bolts 9 into the threaded holes and bolt holes 9, the vector connector sleeve 7 and the vector connector connecting sleeve 10 are connected.

[0036] Dustproof rubber 6 is provided in the gap between the vector ball head 5 and the vector connector sleeve 7. The dustproof rubber 6 is connected to the vector ball head 5 and the vector connector sleeve 7 by vulcanization or binding.

[0037] Sealing rings are provided between the butt joint 1 and the safety pull-out female sleeve 2, between the safety pull-out female sleeve 2 and the safety pull-out male sleeve 4, between the safety pull-out male sleeve 4 and the vector ball head 5, and between the vector joint sleeve 7 and the vector joint connecting sleeve 10. Specifically, O-rings can be used as sealing rings.

[0038] The inner wall of the other end of the vector connector connecting sleeve 10 is provided with a casing buckle, which is used to connect with the casing to achieve subsequent well completion operations.

[0039] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A vector connector for underground multi-well convergence, characterized in that, The system includes a mating connector, a safety pull-out female sleeve, a safety pull-out male sleeve, a vector ball head, a vector connector sleeve, a torque limiting screw, and a vector connector connecting sleeve. The mating connector is connected to one end of the safety pull-out female sleeve, the other end of the safety pull-out female sleeve is connected to one end of the safety pull-out male sleeve, and the other end of the safety pull-out male sleeve is connected to one end of the vector ball head. The other end of the vector ball head has a spherical structure and extends into the vector connector sleeve, where the internal structure of the vector connector sleeve mates with the spherical structure of the vector ball head. The device includes a spherical cavity, with one end of the vector connector sleeve connected to the vector connector connecting sleeve, and one end of the vector connector connecting sleeve having an arc-shaped groove that mates with the spherical structure; it also includes a shear pin, which penetrates the side wall of the safety pull-out female sleeve and connects to the outer wall of the safety pull-out male sleeve; the inner wall of the other end of the safety pull-out female sleeve is a hexagonal structure, and the outer wall of one end of the safety pull-out male sleeve is a hexagonal structure, with a groove at the apex of the hexagonal structure of the safety pull-out male sleeve, into which the shear pin extends.

2. The vector joint for underground multi-well convergence according to claim 1, characterized in that, The spherical structure of the vector ball head is provided with multiple torque transmission grooves, and the torque limiting screw extends into the torque transmission grooves after passing through the vector joint sleeve.

3. The vector joint for underground multi-well convergence according to claim 1, characterized in that, The vector connector sleeve and the vector connector connecting sleeve are connected by multiple bolts.

4. The vector joint for underground multi-well convergence according to claim 1, characterized in that, Dustproof rubber is provided in the gap between the vector ball head and the vector connector sleeve. The dustproof rubber is connected to the vector ball head and the vector connector sleeve by vulcanization or binding.

5. The vector joint for underground multi-well convergence according to claim 1, characterized in that, Sealing rings are respectively provided between the butt joint and the safety pull-out female sleeve, between the safety pull-out female sleeve and the safety pull-out male sleeve, between the safety pull-out male sleeve and the vector ball head, and between the vector joint sleeve and the vector joint connecting sleeve.

6. The vector joint for underground multi-well convergence according to claim 1, characterized in that, A sleeve buckle is provided on the inner wall of the other end of the vector connector connecting sleeve, and the sleeve buckle is used to connect with the sleeve.

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