Slip suspension threaded connection simple casing head

Abstract

The utility model relates to the technical field of slip casing heads, in particular to a slip suspension threaded connection simple casing head which comprises a connecting pipe, and the bottom of the connecting pipe is fixedly connected with a lower supporting ring. The bottom of the lower supporting ring is rotationally connected with an adjusting ring. The inner wall of the adjusting ring is in threaded connection with an adjusting bolt; the outer wall of the adjusting bolt is slidably connected with the inner wall of the lower supporting ring, and the bottom of the adjusting bolt is fixedly connected with a body. The outer wall of the body is slidably connected with the inner wall of the lower supporting ring, and the inner wall close to the body is in lap joint with a special slip. And a hanging piece is clamped on the inner wall of the special slip. In the prior art, when a suspension part is clamped by a slip, the slip is directly extruded, so that clamping operation is carried out, but accurate control cannot be carried out during clamping operation, and the suspension part may be damaged after excessive extrusion; a plurality of fine parts are used during design of traditional equipment, the production precision can be increased during production, and a lot of production cost can be increased under the condition that the sealing requirement is not high.

Description

Technical Field

[0001] The utility model relates to the technical field of slip casing heads, in particular to a simple casing head with slip hanging thread connections. Background Art

[0002] The casing head is a special short joint that is connected to the top of the casing string with threads or flanges and is located on the outer casing in order to support and fix the casing string lowered into the well and install the blowout preventer group and other wellhead equipment when drilling on land or at sea. Different types are suitable for different occasions, and maintenance and inspection are also very important.

[0003] Considering that in the existing technology, the slips are directly squeezed to perform the clamping operation when clamping the suspension parts, but precise control cannot be performed during the clamping operation, and the suspension parts may be damaged after excessive squeezing; traditional equipment uses many small parts in the design, which will increase the production precision during production, and increase a lot of production costs when the sealing requirements are not high. Summary of the Invention

[0004] The purpose of the utility model is to provide a simple casing head with a slip hanging thread connection to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The utility model discloses a simple casing head with a slip hanging thread connection, comprising a pipe, the bottom of the pipe is fixedly connected to a lower support ring; the bottom of the lower support ring is rotatably connected to an adjusting ring; the inner wall of the adjusting ring is threadedly connected to an adjusting bolt; the outer wall of the adjusting bolt is slidably connected to the inner wall of the lower support ring, and the bottom of the adjusting bolt is fixedly connected to a body; the outer wall of the body is slidably connected to the inner wall of the lower support ring, and the inner wall of the body close to the body is overlapped with a special slip; the inner wall of the special slip is clamped with a hanging piece, and the outer wall of the special slip is clamped with the inner wall of the lower support ring.

[0007] When it is necessary to clamp the hanging part, the adjusting bolt is controlled to rotate through the adjusting ring, and the adjusting bolt will move downward during the rotation. Since the contact surface between the main body and the lower support ring is an inclined surface, the adjusting bolt will push the main body to move inside the lower support ring when it moves downward. During the inward movement of the main body, the special slips will be squeezed. Since the special slips are clamped with the inner wall of the lower support ring, the special slips will fit with the hanging part when squeezed and be clamped with it through friction.

[0008] Furthermore, an upper support ring is fixedly connected to the top of the connecting pipe, and the inner wall of the upper support ring is slidably connected to the outer wall of the suspension member.

[0009] By adopting the above technical solution, the connecting pipe can be wrapped by setting the upper support ring to increase its sealing performance.

[0010] Furthermore, a threaded flange is fixedly connected to the top of the upper support ring; a through hole is opened at the center of the threaded flange, and a cover plate is fixedly installed on the top of the threaded flange; the inner wall of the through hole is slidably connected to the outer wall of the suspension member.

[0011] By adopting the above technical solution, the internal sealing can be further increased by arranging the threaded flange and the cover plate, and the stability of the suspension part can be increased by allowing the suspension part to slide inside.

[0012] Furthermore, the inner wall of the cover plate is threadedly connected with a fixing bolt, and the outer wall of the fixing bolt away from the cover plate is threadedly connected with a nut.

[0013] By adopting the above technical solution, the cover plate and the threaded flange can be fixed by setting the fixing bolts and nuts to increase the sealing performance. Fixing by threads can facilitate disassembly and assembly, and facilitate subsequent maintenance.

[0014] Furthermore, a mounting hole is provided at the center of the cover plate, and a hanging ring is fixedly installed on the inner wall of the mounting hole.

[0015] By adopting the above technical solution, the device can be suspended on external equipment through the setting of the lifting ring, or can be directly lifted when transferred.

[0016] Furthermore, the inner wall of the special slip is multi-layer tile-shaped.

[0017] By adopting the above technical solution, the multi-layer tile-shaped design can increase the force-bearing area during clamping and clamping, thereby achieving a better clamping effect.

[0018] The utility model has the following beneficial effects:

[0019] 1. The adjusting bolt is controlled to rotate by the adjusting ring, and moves downward during the rotation of the adjusting bolt. Since the contact surface between the main body and the lower support ring is an inclined surface, the adjusting bolt will push the main body to move inside the lower support ring when it moves downward. During the inward movement of the main body, the special slips will be squeezed. Since the special slips are clamped with the inner wall of the lower support ring, the special slips will fit with the suspension part when squeezed and be clamped with it through friction. The threaded connection can increase the clamping accuracy to prevent damage to the suspension part, and the split installation design can reduce production costs.

[0020] 2. The upper support ring can be used to wrap the pipe to increase its sealing performance, and the threaded flange and cover plate can be used to further increase the internal sealing performance. The suspension parts can be allowed to slide inside to increase their stability. At the same time, the cover plate and threaded flange can be fixed by fixing bolts and nuts to increase their sealing performance. Fixing by threads can facilitate disassembly and assembly, and facilitate later maintenance.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure;

[0024] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0025] In the figure: 1. Lifting ring; 2. Cover plate; 3. Fixing bolt; 4. Nut; 5. Threaded flange; 6. Upper support ring; 7. Connecting pipe; 8. Lower support ring; 9. Adjusting ring; 10. Adjusting bolt; 11. Special slip; 12. Body. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1 As shown, the utility model is a simple casing head with a slip hanging thread connection, comprising a pipe 7, the bottom of which is fixedly connected to a lower support ring 8; the bottom of the lower support ring 8 is rotatably connected to an adjusting ring 9; the inner wall of the adjusting ring 9 is threadedly connected to an adjusting bolt 10; the outer wall of the adjusting bolt 10 is slidably connected to the inner wall of the lower support ring 8, and the bottom of the adjusting bolt 10 is fixedly connected to a body 12; the outer wall of the body 12 is slidably connected to the inner wall of the lower support ring 8, and a special slip 11 is overlapped on the inner wall of the body 12; the inner wall of the special slip 11 is clamped with a hanging part, and the outer wall of the special slip 11 is clamped with the inner wall of the lower support ring 8.

[0028] In this embodiment, it is considered that in the prior art, when the slips are clamped to the suspension parts, they are directly squeezed to perform a clamping operation. However, the clamping operation cannot be precisely controlled, and excessive squeezing may damage the suspension parts. Conventional equipment uses many small parts in its design, which increases production precision during production and significantly increases production costs when the sealing requirements are not high.

[0029] When it is necessary to clamp the suspension, the adjusting bolt 10 is controlled to rotate through the adjusting ring 9, and the adjusting bolt 10 will move downward during the rotation. Since the contact surface between the main body 12 and the lower support ring 8 is an inclined surface, the adjusting bolt 10 will push the main body 12 to move inside the lower support ring 8 when it moves downward. During the inward movement of the main body 12, the special slips 11 will be squeezed. Since the special slips 11 are clamped with the inner wall of the lower support ring 8, the special slips 11 will fit with the suspension when squeezed and be clamped with it through friction. The threaded connection can increase the clamping accuracy to prevent damage to the suspension.

[0030] Specifically, the top of the connecting pipe 7 is fixedly connected to the upper support ring 6, and the inner wall of the upper support ring 6 is slidably connected to the outer wall of the suspension member.

[0031] In this embodiment, the upper support ring 6 can be provided to wrap the connecting pipe 7 to improve its sealing performance.

[0032] Specifically, the top of the upper support ring 6 is fixedly connected with a threaded flange 5; a through hole is opened at the center of the threaded flange 5, and a cover plate 2 is fixedly installed on the top of the threaded flange 5; the inner wall of the through hole is slidably connected to the outer wall of the suspension member.

[0033] In this embodiment, the threaded flange 5 and the cover plate 2 are provided to further enhance the internal sealing, and allowing the suspension member to slide inside can enhance the stability of the suspension member.

[0034] Specifically, the inner wall of the cover plate 2 is threadedly connected with a fixing bolt 3 , and the outer wall of the fixing bolt 3 away from the cover plate 2 is threadedly connected with a nut 4 .

[0035] In this embodiment, the cover plate 2 and the threaded flange 5 can be fixed by setting the fixing bolts 3 and the nuts 4 to increase their sealing performance. Fixing by threads can facilitate disassembly and assembly, and facilitate subsequent maintenance.

[0036] Specifically, a mounting hole is opened at the center of the cover plate 2, and a lifting ring 1 is fixedly installed on the inner wall of the mounting hole.

[0037] In this embodiment, the lifting ring 1 can be used to suspend the device on an external device, or can be directly lifted during transfer.

[0038] Specifically, the inner wall of the special slip 11 is multi-layer tile-shaped.

[0039] In this embodiment, the multi-layer tile-like design can increase the force-bearing area during clamping and clamping, thereby achieving a better clamping effect.

[0040] During use, when it is necessary to clamp the suspension part, the adjusting bolt 10 is controlled to rotate through the adjusting ring 9, and the adjusting bolt 10 will move downward during the rotation. Since the contact surface between the main body 12 and the lower support ring 8 is an inclined surface, when the adjusting bolt 10 moves downward, the main body 12 will be pushed to move inside the lower support ring 8. During the inward movement of the main body 12, the special slips 11 will be squeezed. Since the special slips 11 are clamped with the inner wall of the lower support ring 8, the special slips 11 will fit with the suspension part when squeezed and clamped with it through friction. The multi-layer tile-like design can increase the force area during clamping and make the clamping effect better.

[0041] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A simple casing head with a slip hanging thread connection, comprising a pipe (7), characterized in that: The bottom of the connecting pipe (7) is fixedly connected to a lower support ring (8); the bottom of the lower support ring (8) is rotatably connected to an adjusting ring (9); the inner wall of the adjusting ring (9) is threadedly connected to an adjusting bolt (10); the outer wall of the adjusting bolt (10) is slidably connected to the inner wall of the lower support ring (8), and the bottom of the adjusting bolt (10) is fixedly connected to a body (12); the outer wall of the body (12) is slidably connected to the inner wall of the lower support ring (8), and the inner wall of the body (12) is overlapped with a special slip (11); the inner wall of the special slip (11) is clamped with a hanging part, and the outer wall of the special slip (11) is clamped with the inner wall of the lower support ring (8).

2. The simple casing head with slip hanging thread connection according to claim 1, characterized in that: An upper support ring (6) is fixedly connected to the top of the connecting pipe (7), and the inner wall of the upper support ring (6) is slidably connected to the outer wall of the suspension member.

3. The simple casing head with slip hanging thread connection according to claim 2, characterized in that: The top of the upper support ring (6) is fixedly connected to a threaded flange (5); a through hole is opened at the center of the threaded flange (5), and a cover plate (2) is fixedly installed on the top of the threaded flange (5); the inner wall of the through hole is slidably connected to the outer wall of the suspension member.

4. The simple casing head with slip hanging thread connection according to claim 3, characterized in that: The inner wall of the cover plate (2) is threadedly connected to a fixing bolt (3), and the outer wall of the fixing bolt (3) away from the cover plate (2) is threadedly connected to a nut (4).

5. The simple casing head with slip hanging thread connection according to claim 3, characterized in that: A mounting hole is provided at the center of the cover plate (2), and a hanging ring (1) is fixedly mounted on the inner wall of the mounting hole.

6. The simple casing head with slip hanging thread connection according to claim 1, characterized in that: The inner wall of the special slip (11) is in a multi-layer tile shape.

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