Slip hanger used for lifting resistance of wellhead device and easy to disassemble

Abstract

The utility model relates to the technical field of slip hangers, in particular to a slip hanger used for well head equipment lifting resistance and easy to disassemble, which comprises a slip insert, a base, a shell and a first supporting seat arranged in the shell, and the shell is cylindrical and inversely buckled at the top of the base. The first supporting seat is located at the top of the base, a first limiting device is arranged between the first supporting seat and the base, the first supporting seat slides relative to the base along the first limiting device, the second supporting seat is arranged in the shell, threads are arranged on the outer side of the second supporting seat, the shell is in threaded connection with the second supporting seat, and a sealing gasket is arranged at the top of the second supporting seat. Compared with the prior art, the technical scheme is convenient to disassemble, and the disassembly and maintenance efficiency of the slip hanger and the sleeve is improved.

Description

Technical Field

[0001] This utility model relates to the field of slip hanger technology, and in particular to a slip hanger for wellhead devices that is easy to disassemble and prevents lifting. Background Technology

[0002] Casing hangers are divided into two types: slip type and spindle type. The slip type casing hanger mainly consists of slip teeth, slip seats, rubber seals and support seats. The main function is to hold the casing with the two halves of the slip hanger and insert the whole into the casing head hole, so that the slip teeth tightly grip the casing. Under the action of the casing's own weight and the taper of the slip teeth, the slip teeth wed and tighten, making the slip teeth grip the casing more and more tightly. Meanwhile, the rubber seal deforms under its own weight, forming a seal on the casing and the casing head body.

[0003] As existing slip hangers age, the slips and sleeves become very tightly interlocked, as do the slip teeth and the slip housing, making disassembly difficult. Furthermore, due to long-term corrosion, some old and neglected slip hangers and sleeves have corroded and bonded together, making it even more difficult to disassemble during maintenance and replacement, which seriously affects the efficiency of disassembly and maintenance of slip hangers and sleeves.

[0004] Therefore, it is necessary to propose a slip hanger that is easy to disassemble and can be used for wellhead equipment to facilitate the disassembly of the slip hanger and improve maintenance efficiency. Utility Model Content

[0005] The purpose of this invention is to solve the problem that existing slip hangers are difficult to disassemble as they age. A slip hanger that is easy to disassemble and can be used for wellhead equipment is provided.

[0006] The technical solution of this utility model is:

[0007] A slip hanger for wellhead equipment with adjustable lift and easy disassembly includes slip teeth, a base, and a housing. The housing is cylindrical and inverted on top of the base. It also includes a first support seat placed inside the housing, located on top of the base with a first limiting device between them. The first support seat slides relative to the base along the first limiting device. A second support seat is placed inside the housing, with threads on its outer side. The housing is threadedly connected to the second support seat, and a sealing gasket is provided between the second support seat and the housing. A second limiting device is provided between the second support seat and the first support seat, allowing the second support seat to slide relative to the first support seat via the second limiting device. The slip teeth are located inside the first support seat. A clamping member is provided on the top of the housing. When the clamping member presses against the slip teeth, the first and second support seats provide support for the slip teeth.

[0008] Furthermore, the second limiting device includes a second limiting protrusion and a second limiting groove. The second limiting protrusion is fixedly connected to the first support base, and the second limiting groove is located at the bottom of the second support base. By inserting the two together, the second support base can slide relative to the first support base, and on the other hand, it can ensure that when subjected to an upward force from the sleeve, the outer shell can overcome the upward force from the sleeve by relying on the weight of the first and second support bases.

[0009] Furthermore, the top of the first support is a convex conical slope, and the bottom of the second support is a concave conical slope. This structural design allows the second limiting device to be in an inclined state. When the outer shell is removed, the second support can slide in a divergent manner along the inclined direction of the second limiting device towards the periphery of the first support, so that the second support is away from the locking teeth.

[0010] Furthermore, the first limiting device includes a first limiting protrusion and a first limiting groove. The first limiting protrusion is fixedly connected to the base, and the first limiting groove is located at the bottom of the first support. Preferably, the first limiting groove is an annular groove, and the first limiting protrusion is an annular protrusion.

[0011] Furthermore, the bottom of the first support is a plane, and the top of the base is a plane, enabling the first support to slide relative to the base in a horizontal plane.

[0012] Furthermore, a sealing sleeve is provided on the top of the base. The sealing sleeve is located between the base and the first support seat and between the base and the outer shell. There is a gap between the first support seat and the base. In order to improve the sealing performance, the sealing sleeve can fill the gap and improve the airtightness.

[0013] Furthermore, a first groove is provided at the outer edge of the first support seat, and a second groove is provided at the outer edge of the second support seat. The first groove and the second groove are joined together to form a sealing groove for accommodating the sealing ring. The outer shell squeezes the sealing ring into the sealing groove. Since there is also a gap between the first support seat and the second support seat, the sealing groove between them can improve the airtightness by adding a sealing ring.

[0014] Furthermore, the clamping component is threadedly connected to the outer casing, and a clamping head is fixedly connected to the bottom of the clamping component. The diameter of the clamping head is larger than the diameter of the clamping component. The clamping head can clamp the slip teeth to ensure that the slip teeth are fixed to the sleeve.

[0015] This utility model discloses a slip hanger for wellhead devices that is easy to disassemble and prevents lift. During disassembly, the outer casing is first separated from the second support seat, and the outer casing is removed from the well. This removes the outer casing from supporting the first and second support seats. The resulting gap allows the second support seat to slide relative to the first support seat, moving it away from the slip teeth. Without the support of the second support seat, even if the slip teeth are adhered to the casing, they can be easily removed. After removing the slip teeth from the well, since the first and second support seats are not in direct contact with the casing, they do not adhere, making them easy to remove. After removal, the first support seat can slide relative to the base via a first limiting device, facilitating the disassembly and separation of the first support seat from the base, thus making the device easy to disassemble. When installed correctly... During operation, the outer casing is fixedly connected to the second support seat via threads. When the sleeve is subjected to upward pressure, the clamping element on the outer casing can squeeze and fix the slip teeth, preventing the slip teeth from being moved upward by the sleeve and ensuring the fixing effect of the slip teeth on the sleeve. In addition, the outer casing is fixedly connected to the second support seat, and the second support seat is connected to the first support seat through the second limiting device. The first support seat is connected to the base through the first limiting device. Therefore, when the outer casing is subjected to upward pressure from the sleeve, the base, the first support seat, and the second support seat can overcome the upward pressure from the sleeve by their own weight, ensuring the stability of the overall structure and playing a role in preventing upward movement. The sealing gasket can seal the gap between the second support seat and the outer casing, improve airtightness, and prevent leakage. Compared with traditional technology, this technical solution is easy to disassemble, improving the disassembly and maintenance efficiency of the slip hanger and the sleeve. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the present invention;

[0017] Figure 2 This is a reference diagram showing the disassembled state of this utility model;

[0018] Figure 3 This is a perspective view of the first support base of this utility model;

[0019] Figure 4 This is a perspective view of the second support base of this utility model.

[0020] Reference numerals: 1. Vault tooth; 2. Base; 3. Outer shell; 4. First support seat; 5. Second support seat; 6. Sealing gasket; 7. Sealing sleeve; 8. Tightening head; 9. Tightening component; 10. Thread; 12. Second limiting protrusion; 13. Second limiting groove; 14. First limiting protrusion; 15. First limiting groove. Detailed Implementation

[0021] To make the technical means, technical features, utility model purpose and technical effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0022] Example 1:

[0023] like Figure 1 As shown, this embodiment provides a slip hanger for wellhead devices that is easy to disassemble and has a lifting resistance. It includes a slip tooth 1, a base 2, and a housing 3. The housing 3 is cylindrical and is inverted on top of the base 2. It also includes a first support seat 4 placed inside the housing 3. The first support seat 4 is located on top of the base 2 and a first limiting device is provided between the two. The first support seat 4 slides relative to the base 2 along the first limiting device. A second support seat 5 is placed inside the housing 3. The outer side of the second support seat 5 is provided with a thread 10. The housing 3 and the second support seat 5 are connected by the thread 10. A sealing gasket 6 is provided between the second support seat 5 and the housing 3. A second limiting device is provided between the second support seat 5 and the first support seat 4. The second support seat 5 slides relative to the first support seat 4 through the second limiting device. The slip tooth 1 is located inside the first support seat 4. A tightening member 9 is provided on the top of the housing 3. When the tightening member 9 presses the slip tooth 1, the first support seat 4 and the second support seat 5 provide support for the slip tooth 1.

[0024] Preferred, such as Figure 3 As shown, the second limiting device includes a second limiting protrusion 12 and a second limiting groove 13. The second limiting protrusion 12 is fixedly connected to the first support base 4 by screws or welded. The second limiting groove 13 is located at the bottom of the second support base 5. By inserting the two together, the second support base 5 can slide relative to the first support base 4. On the other hand, it can ensure that when subjected to an upward force from the sleeve, the outer shell 3 can overcome the upward force from the sleeve by relying on the gravity of the first support base 4 and the second support base 5.

[0025] Preferred, such as Figure 3 As shown, the top of the first support 4 is a convex conical slope, and the bottom of the second support 5 is a concave conical slope. This structural design allows the second limiting device to be in an inclined state. When the outer shell 3 is removed, the second support 5 can slide in a divergent manner along the inclined direction of the second limiting device towards the periphery of the first support 4, so that the second support 5 is away from the locking tooth 1.

[0026] Preferred, such as Figure 3 and Figure 4 As shown, the first limiting device includes a first limiting protrusion 14 and a first limiting groove 15. The first limiting protrusion 14 is fixedly connected to the base 2, and the first limiting groove 15 is located at the bottom of the first support base 4. Preferably, the first limiting groove 15 is an annular groove, and the first limiting protrusion 14 is an annular protrusion.

[0027] Preferred, such as Figure 3 and Figure 4 As shown, the bottom of the first support 4 is a plane and the top of the base 2 is a plane, so that the first support 4 can slide relative to the base 2 in the horizontal plane.

[0028] Preferred, such as Figure 1 The top of the base 2 is provided with a sealing sleeve 7. The sealing sleeve 7 is located between the base 2 and the first support 4 and between the base 2 and the outer shell 3. There is a gap between the first support 4 and the base 2. In order to improve the sealing performance, the sealing sleeve 7 can fill the gap and improve the airtightness.

[0029] Preferred, such as Figure 1 The clamping part 9 is connected to the outer shell 3 by thread 10. The bottom of the clamping part 9 is fixedly connected to the clamping head 8. The diameter of the clamping head 8 is larger than the diameter of the clamping part 9. The clamping head 8 can clamp the slip tooth 1 to ensure that the slip tooth 1 is fixed to the sleeve.

[0030] Preferably, the base 2 is divided into four fan-shaped parts, and the four parts form a complete base 2, such as... Figure 3 As shown, the first support base 4 matches the base 2 and is also composed of four parts. Each part of the first support base 4 is provided with a first limiting device between the first support base 4 and the base 2. First, the base 2 of each part is connected to the first support base 4 through the first limiting device. Then, the adjacent parts of the base 2 are connected and fixed with screws, so as to splice together a complete base 2 and the first support base 4. The second support base 5 is also composed of four identical fan-shaped parts spliced ​​together and matches the first support base 4.

[0031] During use, during disassembly, such as Figure 2As shown, rotate the outer shell 3 to separate it from the second support seat 5, and remove the outer shell 3 from the well, so that the outer shell 3 no longer provides support for the first support seat 4 and the second support seat 5. Then remove the sealing gasket 6. The gap created after the outer shell 3 is removed allows the second support seat 5 to slide relative to the first support seat 4 in all directions, moving the second support seat 5 away from the slip tooth 1. At this time, the slip tooth 1, which is no longer supported by the second support seat 5, can be easily removed from the casing even if it is stuck to the casing. After the slip tooth 1 is removed from the well, since the first support seat 4 and the second support seat 5 are not in direct contact with the casing, they will not stick together. Therefore, the first support seat 4 and the second support seat 5 can be easily removed from the well. After removal, the first support seat 4 can slide relative to the base 2 through the first limiting device, which facilitates the disassembly and separation of the first support seat 4 and the base 2, making the device easier to disassemble. During installation, the base 2 and the first support seat 4 are first connected through the first limiting device, and the first support seat 4 is then connected above by the first limiting device. The second limiting device is connected to the second support base 5. The slip tooth 1 is placed inside the second support base 5. Finally, the outer shell 3 is connected to the second support base 5 by the thread 10, thereby fixing the whole. Then, the whole is placed into the well. The tightening member 9 is adjusted to press the slip tooth 1. When the casing is subjected to upward pressure, the tightening member 9 on the outer shell 3 can squeeze and fix the slip tooth 1, preventing the slip tooth 1 from moving upward with the casing, and ensuring the fixing effect of the slip tooth 1 on the casing. In addition, the outer shell 3 is fixedly connected to the second support base 5. The second support base 5 is connected to the first support base 4 through the second limiting device. The first support base 4 is connected to the base 2 through the first limiting device. When the outer shell 3 is subjected to the upward pressure from the casing, the base 2, the first support base 4 and the second support base 5 can overcome the upward pressure from the casing by their own weight, ensuring the stability of the overall structure and playing a role in preventing the rise. Compared with the traditional technology, this technical solution is convenient to disassemble and improves the disassembly and maintenance efficiency of the slip hanger and the casing.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. All equivalent changes and modifications made in accordance with the scope of the claims of this utility model should fall within the technical scope of this utility model.

Claims

1. A wellhead device blocking and easy to disassemble slip hanger, comprising a slip tooth (1), a base (2) and a shell (3), characterized in that: The shell (3) is cylindrical and is inverted on the top of the base (2), further comprising, a first support seat (4) disposed in the shell (3), the first support seat (4) being located on the top of the base (2) and being provided with a first limiting device therebetween, the first support seat (4) sliding relative to the base (2) along the first limiting device; a second support seat (5) disposed in the shell (3), the outer side of the second support seat (5) being provided with a screw thread (10), the shell (3) being connected with the second support seat (5) through the screw thread (10), the second support seat (5) and the shell (3) being provided with a sealing gasket (6) therebetween, the second support seat (5) and the first support seat (4) being provided with a second limiting device therebetween, the second support seat (5) sliding relative to the first support seat (4) through the second limiting device; a slip (1) located on the inner side of the first support seat (4), the top of the shell (3) being provided with a jacking piece (9), the first support seat (4) and the second support seat (5) providing support for the slip (1) when the jacking piece (9) extrudes the slip (1).

2. A slip hanger for a wellhead assembly that resists lifting and is easily removable as claimed in claim 1, wherein: The second limiting device comprises a second limiting protrusion (12) and a second limiting groove (13), the second limiting protrusion (12) being fixedly connected with the first support seat (4), and the second limiting groove (13) being located on the bottom of the second support seat (5).

3. A slip hanger for a wellhead assembly that resists lifting and is easily removable as claimed in claim 2, wherein: The top of the first support seat (4) is an outwardly convex conical slope, and the bottom of the second support seat (5) is an inwardly concave conical slope.

4. The slip hanger for a wellhead that resists lifting and is easily detached of claim 1, wherein: The first limiting device comprises a first limiting protrusion (14) and a first limiting groove (15), the first limiting protrusion (14) being fixedly connected with the base (2), and the first limiting groove (15) being located on the bottom of the first support seat (4).

5. A slip hanger for a wellhead assembly that resists lifting and is easily removable as claimed in claim 4, wherein: The bottom of the first support seat (4) is a plane, and the top of the base (2) is a plane.

6. A slip hanger for a wellhead assembly that resists lifting and is easily disassembled as claimed in claim 5, wherein: The top of the base (2) is provided with a sealing sleeve (7), the sealing sleeve (7) being located between the base (2) and the first support seat (4) and between the base (2) and the shell (3).

7. A slip hanger for a wellhead assembly that resists lifting and is easily disassembled as in claim 1, wherein: The jacking piece (9) is connected with the shell (3) through the screw thread (10), the jacking piece (9) being fixedly connected with a jacking head (8) at the bottom thereof, the jacking head (8) having a diameter greater than that of the jacking piece (9).

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