A pipe string slip device

Abstract

The application discloses a pipe column anti-slip slip device, a base is hollowly arranged, at least two slip units are arranged on the base, the slip units are arranged in an annular array around the base, one end of a connecting rod in the slip unit is hingedly connected with the base, the other end of the connecting rod is hingedly connected with a slip part, the connecting rod is connected with a magnetic block, and the magnetic block is connected with the pipe column through magnetic force. The magnetic force between the magnetic block, the connecting rod and the pipe column drives the slip part to move, and the pipe column sliding-down action is converted into the power of the slip part clamping the pipe column, so that the clamping and unloading operations of the whole slip device do not need to rely on manpower, labor is saved, work load is reduced, and the efficiency is higher.

Description

Technical Field

[0001] This invention belongs to the technical field of drilling and production equipment, and in particular to a pipe string anti-slip slip device. Background Technology

[0002] During wellbore operations such as well construction, well workover, and well testing, raising the tubing string is an essential procedure. For example, after drilling, the drill string needs to be retrieved from the well; after well testing, the tubing needs to be retrieved. In practice, a hoisting device is used to grab or clamp one end of the tubing string outside the wellhead and raise it. Once the connection point of the two tubing sections is away from the wellhead, a slip device is used to clamp the lower section of the tubing string. At this point, the connection point of the two tubing sections is outside the wellhead and can be disassembled. After disassembly, the next section of the tubing string can be repeatedly raised and disassembled. The slip device is a crucial piece of equipment in this operation. Its main function is to clamp the lower part of the tubing string at the connection point to prevent it from falling into the well. Of course, when it is necessary to continue raising the tubing string, the slip device needs to separate from the tubing string or at least not clamp it, which involves the reverse unloading movement of the slip. Currently, these clamping and unloading actions all require manual operation, which is labor-intensive, consumes a lot of manpower, and is inefficient. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art and provide a pipe anti-slip slip device.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] A pipe column anti-slip slip device includes a base and slip units. The base is annularly hollow and has at least two slip units arranged in a circular array around the base. One end of a connecting rod in each slip unit is hinged to the base, and the other end is hinged to the slip portion. The connecting rod is connected to a magnetic block, which is magnetically attracted to the pipe column. A limiting structure is provided on the base.

[0006] Furthermore, the base is composed of several arc-shaped components connected by bolts.

[0007] Furthermore, the slip portion is provided with anti-slip teeth on the surface facing the column.

[0008] Furthermore, the limiting structure is a limiting block that is fixedly connected to the base.

[0009] Furthermore, the magnetic block and the connecting rod are connected by magnetic attraction or a connector.

[0010] Furthermore, the magnetic block is connected to the connecting rod by magnetic attraction, the magnetic block is installed on the slide groove, and one end of the slide groove is installed on the base.

[0011] Furthermore, a limiting part is provided at the other end of the slide, and the slide is made of plastic.

[0012] Furthermore, the sliding contact surface between the groove and the magnetic block is provided with balls or rollers.

[0013] Furthermore, the magnetic block is connected to the connecting rod by a rope, and the magnetic block is mounted on a movable trolley.

[0014] Furthermore, the movable trolley contacts the tubular column via wheels, and the movable trolley is equipped with brakes.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention provides a pipe column anti-slip clamping device. One end of a connecting rod in the clamping unit is hinged to the base, and the other end is hinged to the clamping part. A magnetic block is connected to the connecting rod, so that when the magnetic block moves along the pipe column's axial direction, it drives the connecting rod to rotate. The magnetic attraction between the magnetic block and the pipe column allows the pipe column to move the magnetic block along the pipe column's axial direction, i.e., both move together in the same direction, achieving clamping and separation between the clamping part and the pipe column. When the connecting rod rotates clockwise around the base, it clamps the pipe column; when the connecting rod rotates counterclockwise around the base, it separates from the pipe column, i.e., unloading. This invention utilizes the magnetic force between the magnet, the connecting rod, and the pipe column to drive the movement of the clamping part, converting the downward movement of the pipe column into the power for the clamping part to clamp the pipe column. The clamping and unloading operations of the entire clamping device do not require manual labor, saving labor, reducing workload, and increasing efficiency.

[0017] Furthermore, by setting up a chute and a movable trolley, zero contact between the magnetic block and the tube column is achieved. The tube column does not come into contact with the slip device during the lifting process, which reduces vulnerable parts and helps to extend the service life of the equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention.

[0020] Figure 2 This is a schematic diagram of the kawa unit structure in Embodiment 1 of the present invention.

[0021] Figure 3 This is a partial perspective view of the kava unit of Embodiment 1 of the present invention.

[0022] Figure 4 This is a schematic diagram of the connecting rod of the present invention.

[0023] Figure 5 This is a schematic diagram of the slide groove in Embodiment 1 of the present invention.

[0024] Wherein: 1-base, 2-slip unit, 11-arc-shaped part, 21-slip part, 22-connecting rod, 23-magnetic block, 24-slide groove, 25-limiting part. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0031] The present invention will now be described in further detail with reference to the accompanying drawings:

[0032] See Figure 1 This invention provides a pipe column anti-slip clamping device, including an annular base 1 with a hollow portion in the middle for the pipe column to pass through; the base 1 is provided with at least two clamping units 2 for clamping the pipe column; each clamping unit 2 includes a clamping part 21, a connecting rod 22, and a magnetic block 23; one end of the connecting rod 22 is hinged to the clamping part 21, and the other end is hinged to an arc-shaped component 11. When the connecting rod 22 rotates around the base 1 in both forward and reverse directions, it will drive the clamping part 21 to clamp and unload the pipe column. Figure 4 As shown, when the connecting rod 22 rotates clockwise around the base 1, it clamps the tube column; when the connecting rod 22 rotates counterclockwise around the base 1, it separates from the tube column, i.e., unloads. The magnetic attraction between the magnetic block 23 and the tube column allows the tube column to drive the magnetic block 23 to move axially with the tube column. When the magnetic block 23 moves downward axially with the tube column, it drives the connecting rod 22 to rotate, causing the clamping part 21 to clamp the tube column. To enhance the clamping force of the clamping part 21 on the tube column, the surface of the clamping part 21 facing the tube column is provided with anti-slip teeth. This clamping device also includes a limiting structure, which can be a limiting block fixedly connected to the base 1. The limiting structure is used to limit the highest position of the magnetic block 23, so that the distance the magnetic block 23 moves upward along the tube column axis is less than the height of a section of the tube column. When the magnetic block 23 continues to move upward along with the tube column after reaching the highest position, the magnetic block 23 moves relative to the tube column, and the tube column rises relative to the magnetic block 23, so that the magnetic block 23 is always below the connection point of the two tube columns to be disassembled.

[0033] Example 1:

[0034] A pipe column anti-slip clamping device includes an annular base 1 and three clamping units 2 fixed on the base 1. The three clamping units 2 are arranged in a circular array around the base 1. The base 1 is assembled from three arc-shaped pieces 11 connected by bolts, which facilitates disassembly. The hollow part in the middle of the base 1 allows the pipe column to pass through. The three clamping units 2 are correspondingly arranged on the three arc-shaped pieces 11 for clamping the pipe column.

[0035] Each locking unit 2 includes a locking part 21, a connecting rod 22, and a magnetic block 23. The magnetic block 23 is magnetically attracted to both the tube column and the connecting rod 22. The magnetic attraction between the magnetic block 23 and the connecting rod 22 allows the magnetic block 23 to rotate along the axial direction of the tube column. The magnetic attraction between the magnetic block 23 and the tube column allows the tube column to move the magnetic block 23 axially with the tube column, i.e., both move in the same direction, achieving the clamping and separation of the locking part 21 from the tube column. When the tube column is lifted, the magnetic force between the magnetic block 23 and the tube column causes the magnetic block 23 to rise axially with the tube column, driving the connecting rod 22 to rotate, separating the locking part 21 from the tube column, allowing the tube column to continue moving upward. When the tube column moves downward, the magnetic force between the magnetic block 23 and the tube column causes the magnetic block 23 to move axially downward with the tube column, pushing the connecting rod 22 to rotate in the opposite direction, and the locking part 21 clamps the outer wall of the tube column, thereby preventing the tube column from falling. To reduce frictional losses between the magnetic block 23 and the tube column, the magnetic block 23 and the tube column are arranged without contact. The locking unit 2 also includes a sliding groove 24 supported on the base 1 for the magnetic block 23 to slide. The sliding groove 24, made of plastic, is located on the outside of the tube column to separate the magnetic block 23 from the tube column. To further reduce friction between the magnetic block 23 and the sliding groove 24, ball bearings or rollers are provided on the sliding contact surface between the magnetic block 23 and the sliding groove 24. A limiting part 25 is provided at the upper end of the sliding groove 24 to limit the highest position of the magnetic block 23 as it rises with the tube column. This eliminates the need to consider the issue that the magnetic force between the magnetic block 23 and the tube column must be less than the magnetic force of the magnetic block 23 on the connecting rod 22. This issue would cause the magnetic block 23 to continuously move axially upwards with the tube column, preventing the locking device from locking onto the next section of the tube column.

[0036] Example 2:

[0037] This embodiment shares the same base 1, connecting rod 22, locking part 21, and magnetic block 23 as Embodiment 1. The difference lies in the non-contact arrangement of the magnetic block 23 and the tube column. The magnetic block 23 is connected to the connecting rod 22 via a rope and is mounted on a movable trolley. The movable trolley slides along the outer wall of the tube column, reducing friction between the magnetic block 23 and the tube column through wheel contact. A key aspect of this embodiment is the presence of a brake on the movable trolley. This brake continuously exerts a braking force on the wheels of the movable trolley, ensuring that the friction between the wheels and the tube column exceeds the weight of the movable trolley and the magnetic block 23. This prevents the wheels from rotating freely, which would prevent the tube column from lifting the magnetic block 23 and causing the magnetic block 23 and the movable trolley to fall axially along the tube column instead of rising with it.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pipe column anti-slip clamping device, characterized in that, Includes a base (1) and a locking unit (2). The base (1) is a hollow ring. At least two locking units (2) are provided on the base (1). The locking units (2) are arranged in a ring array around the base (1). One end of the connecting rod (22) in the locking unit (2) is hinged to the base (1), and the other end of the connecting rod (22) is hinged to the locking part (21). The connecting rod (22) is connected to a magnetic block (23). The magnetic block (23) is magnetically attracted to the column. A limiting structure is provided on the base (1). The magnetic block (23) is connected to the connecting rod (22) by magnetic attraction. The magnetic block (23) is installed on the slide groove (24), and one end of the slide groove (24) is installed on the base (1). The other end of the slide (24) is provided with a limiting part (25), and the slide (24) is made of plastic. The sliding contact surface between the groove (24) and the magnetic block (23) is provided with balls or rollers.

2. The anti-slip clamping device for a tubular column according to claim 1, characterized in that, The base (1) is formed by connecting several arc-shaped parts (11) with bolts.

3. The anti-slip clamping device for a tubular column according to claim 1, characterized in that, The slip section (21) has anti-slip teeth on the surface facing the column.

4. The anti-slip clamping device for a tubular column according to claim 1, characterized in that, The limiting structure is a limiting block that is fixedly connected to the base (1).

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