Wellhead sealing tool

Abstract

The utility model proposes a wellhead sealing tool, which belongs to the technical field of oilfield wellhead sealing. It solves the problems that the existing wellhead sealing equipment is bulky and the sealing process is cumbersome, the labor intensity of workers is high, the construction efficiency is low, and the potential safety hazards are high. It includes a wellhead sealing valve, the wellhead sealing valve includes a seat sealing body and a sealing body, the seat sealing body includes a sealing seat and a casing head, the sealing seat includes a seat body and a seat bottom plate, the seat body is arranged at the top of the center of the seat bottom plate, the casing head sleeve is arranged on the outside of the seat body, the inner wall of the bottom end of the casing head is connected to the outer edge of the seat bottom plate, the sealing body is arranged in the inner cavity of the seat body and is threadedly connected to the inner wall of the seat body, and the bottom of the sealing body is matched with the seat bottom plate. It is mainly used for sealing oilfield wellheads.

Description

Technical Field

[0001] The utility model belongs to the technical field of oilfield wellhead sealing, in particular to a wellhead sealing tool. Background Art

[0002] In the process of oil and gas well exploitation, well sealing equipment is generally installed on the wellhead to prevent well surges. However, the existing well sealing equipment is bulky and the well sealing process is cumbersome, the labor intensity of workers is high, the construction efficiency is low, and the safety hazards are high. Therefore, there is an urgent need for a convenient, fast, safe and reliable wellhead sealing tool. Utility Model Content

[0003] In view of this, the utility model aims to propose a wellhead sealing tool to solve the problems that the existing well sealing equipment is bulky and the sealing process is complicated, the labor intensity of workers is high, the construction efficiency is low, and there are high safety hazards.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a wellhead sealing tool, which includes a well sealing valve, the well sealing valve includes a seat sealing body and a sealing body, the seat sealing body includes a sealing seat and a casing head, the sealing seat includes a seat body and a seat bottom plate, the seat body is arranged at the top of the center of the seat bottom plate, the casing head sleeve is arranged on the outside of the seat body, the inner wall of the bottom end of the casing head is connected to the outer edge of the seat bottom plate, the sealing body is arranged in the inner cavity of the seat body and is threadedly connected to the inner wall of the seat body, and the bottom of the sealing body is matched with the seat bottom plate.

[0005] Furthermore, the sealing body comprises a bolt block, a threaded block and a sealing block which are sequentially connected from top to bottom, the threaded block is threadedly connected to the inner wall of the seat body, and the sealing block is cooperatively connected to the seat bottom plate.

[0006] Furthermore, the well sealing valve also includes a cover plate, and the cover plate is arranged above the sealing seat.

[0007] Furthermore, the well sealing valve also includes a lower outer sleeve, which is sleeved on the outer side of the sealing seat with intervals, and the cover plate is connected to the top end of the lower outer sleeve.

[0008] Furthermore, a flange is connected to the top of the outer wall of the seat body, and the seat body is connected to the lower outer sleeve through the flange.

[0009] Furthermore, a through hole is opened on one side of the outer wall of the seat body, and the through hole is connected to the inner cavity of the seat body.

[0010] Furthermore, the wellhead sealing tool also includes a special wrench, which includes a wrench rod and a wrench head. The wrench rod includes a long rod and a short rod vertically connected to each other, the top end of the short rod is connected to one end of the long rod, and the bottom end of the short rod is connected to the wrench head. The bottom of the wrench head is provided with an inner hole that matches the bolt block.

[0011] Furthermore, the connection between the long rod and the short rod is a rounded corner.

[0012] Furthermore, the cover plate is provided with a special-shaped hole matched with a special wrench.

[0013] Furthermore, the special-shaped hole includes a round hole and a strip hole, the round hole and the strip hole are connected, the strip hole matches with the short rod of the wrench rod, and the round hole matches with the wrench head.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a wellhead sealing tool, which is suitable for a wellhead with a 5.5-inch casing. The sealing valve is connected to the 5.5-inch casing of the wellhead, and a special wrench is used to rotate the sealing body to achieve the sealing and pressure relief operations of the oil well. The sealing valve has a simple structure and operation, low cost, reduces the labor intensity of workers, improves construction efficiency, and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0016] Figure 1 This is an assembly diagram of a wellhead sealing tool, a wellhead and a casing according to the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of a well sealing valve in a wellhead sealing tool according to the utility model;

[0018] Figure 3 It is a structural schematic diagram of a special wrench in a wellhead sealing tool described in the utility model;

[0019] Figure 4 It is a bottom view schematic diagram of a special wrench in a wellhead sealing tool described in the utility model;

[0020] Figure 5 It is a schematic cross-sectional view of the structure of a seat sealing body of a well sealing valve in a wellhead sealing tool described in the utility model;

[0021] Figure 6 It is a structural schematic diagram of a sealing body of a well sealing valve in a wellhead sealing tool described in the utility model;

[0022] Figure 7 It is a schematic cross-sectional view of the structure of the lower outer sleeve of the well sealing valve in the wellhead sealing tool described in the utility model;

[0023] Figure 8 This is a structural schematic diagram of a cover plate of a well sealing valve in a wellhead sealing tool according to the utility model;

[0024] Fig. 9 The utility model is a schematic structural diagram of a flange of a well sealing valve in a wellhead sealing tool.

[0025] 1-well sealing valve, 2-seat sealing body, 3-sealing body, 4-cover plate, 5-lower outer sleeve, 6-sealing seat, 7-casing head, 8-seat body, 9-seat bottom plate, 10-flange, 11-special wrench, 12-wrench rod, 13-wrench head, 14-special-shaped hole, 15-bolt block, 16-threaded block, 17-sealing block, 18-wellhead, 19-casing. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely explain the technical solutions in the embodiments of the utility model. It should be noted that the embodiments and features in the embodiments of the utility model can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0027] See also Figure 1-9 To illustrate the present embodiment, a wellhead sealing tool comprises a wellhead sealing valve 1, wherein the wellhead sealing valve 1 comprises a seat sealing body 2 and a sealing body 3, wherein the seat sealing body 2 comprises a sealing seat 6 and a casing head 7, wherein the sealing seat 6 comprises a seat body 8 and a seat bottom plate 9, wherein the seat body 8 is arranged at the top of the center of the seat bottom plate 9, and the casing head 7 is sleeved on the outside of the seat body 8, wherein the inner wall of the bottom end of the casing head 7 is connected to the outer edge of the seat bottom plate 9, wherein the sealing body 3 is arranged in the inner cavity of the seat body 8 and is threadedly connected to the inner wall of the seat body 8, and the bottom of the sealing body 3 is cooperatively connected to the seat bottom plate 9. In the present embodiment, the sealing of the wellhead 18 and the casing 19 is achieved with the cooperation of the seat sealing body 2 and the sealing body 3.

[0028] This embodiment is suitable for a wellhead 18 with a 5.5-inch casing 19. The sealing valve 1 is connected to the 5.5-inch casing 19 of the wellhead 18, and a special wrench 11 is used to rotate the sealing body 3 to achieve sealing and pressure relief operations on the oil well. The sealing valve 1 has a simple structure and operation, low cost, reduces the labor intensity of workers, improves construction efficiency, and is safe and reliable.

[0029] The sealing body 3 described in this embodiment includes a bolt block 15, a threaded block 16 and a sealing block 17 connected in sequence from top to bottom. The threaded block 16 is threadedly connected to the inner wall of the seat body 8, and the sealing block 17 is matched with the seat bottom plate 9. The bolt block 15 is used to match the sealing body 3 with the special wrench 11, and the threaded block 16 is used to be threadedly connected with the inner wall of the seat body 8 to realize the up and down movement of the sealing body 3. The sealing block 17 is matched with the seat bottom plate 9 for sealing the well sealing valve 1.

[0030] In this embodiment, the well sealing valve 1 further includes a cover plate 4 , which is arranged above the sealing seat 6 .

[0031] In this embodiment, the well sealing valve 1 further comprises a lower outer sleeve 5 , which is sleeved on the outer side of the sealing seat 6 at intervals, and the cover plate 4 is connected to the top end of the lower outer sleeve 5 .

[0032] In this embodiment, a flange 10 is connected to the top of the outer wall of the seat body 8 , and the seat body 8 is connected to the lower outer sleeve 5 via the flange 10 . The flange 10 is used to fix the well sealing valve 1 .

[0033] In this embodiment, a through hole is opened on one side of the outer wall of the seat body 8, and the through hole is connected to the inner cavity of the seat body 8. The inner cavity of the seat body 8 is connected to the outside through the through hole. The through hole is used to relieve pressure at the wellhead 18 when the sealing body 3 is separated from the seat bottom plate 9.

[0034] The wellhead sealing tool in this embodiment also includes a special wrench 11, which includes a wrench rod 12 and a wrench head 13. The wrench rod 12 includes a long rod and a short rod vertically connected to each other, the top end of the short rod is connected to one end of the long rod, and the bottom end of the short rod is connected to the wrench head 13. The bottom of the wrench head 13 is provided with an inner hole that matches the bolt block 15.

[0035] In this embodiment, the connection between the long rod and the short rod is a rounded corner.

[0036] In this embodiment, the cover plate 4 is provided with a special-shaped hole 14 that matches with the special wrench 11. The special-shaped hole 14 includes a round hole and a strip hole. The round hole and the strip hole are connected. The strip hole matches with the short rod of the wrench rod 12. The round hole matches with the wrench head 13. In this embodiment, after the wrench head 13 passes through the cover plate 4 from the round hole, the short rod is moved along the strip hole to the center of the cover plate 4, so that the wrench head 13 is directly opposite to the bolt block 15 of the sealing body 3 and then passed through the wrench rod. 12 moves the wrench head 13 downward, so that the wrench head 13 is connected with the bolt block 15. According to the actual situation, the special wrench 11 is rotated forward or reversely to realize the downward or upward movement of the sealing body 3. When separating, the wrench head 13 is moved upward by the wrench rod 12, so that the wrench head 13 is separated from the bolt block 15. After the wrench head 13 is separated from the bolt block 15, the short rod is moved in the opposite direction along the strip hole to the circular hole of the cover plate 4, and the wrench head 13 is moved upward again to completely separate the special wrench 11 and the well sealing valve 1.

[0037] The working principle of this embodiment is as follows:

[0038] The sealing valve 1 is connected to the 5.5-inch casing 19 of the wellhead 18. When the well needs to be shut in, a special wrench 11 is used to pass through the cover plate 4 and rotate the sealing body 3. The sealing body 3 moves down and fits tightly with the seat bottom plate 9 of the seat sealing body 2. The sealing of the wellhead 18 is achieved through the joint action of the sealing body 3 and the seat sealing body 2, thereby completing the well sealing operation. When the pressure difference in the well is too large or production is required, a special wrench 11 is used to pass through the cover plate 4 and rotate the sealing body 3 in the opposite direction, so that the sealing body 3 moves up and the sealing body 3 is separated from the seat bottom plate 9. At this time, the wellhead 18 is connected to the outside through the through hole in the side wall of the seat body 8, thereby realizing the pressure relief, production and subsequent operations of the wellbore.

[0039] The embodiments of the utility model disclosed above are only used to help explain the utility model. The embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model.

Claims

1. A wellhead sealing tool, characterized in that: It comprises a well sealing valve (1), wherein the well sealing valve (1) comprises a seat sealing body (2) and a sealing body (3), wherein the seat sealing body (2) comprises a sealing seat (6) and a casing head (7), wherein the sealing seat (6) comprises a seat body (8) and a seat bottom plate (9), wherein the seat body (8) is arranged at the top of the center of the seat bottom plate (9), wherein the casing head (7) is sleeved on the outside of the seat body (8), wherein the inner wall of the bottom end of the casing head (7) is connected to the outer edge of the seat bottom plate (9), wherein the sealing body (3) is arranged in the inner cavity of the seat body (8) and is threadedly connected to the inner wall of the seat body (8), and wherein the bottom of the sealing body (3) is cooperatively connected to the seat bottom plate (9).

2. A wellhead sealing tool according to claim 1, characterized in that: The sealing body (3) comprises a bolt block (15), a threaded block (16) and a sealing block (17) which are connected in sequence from top to bottom; the threaded block (16) is threadedly connected to the inner wall of the seat body (8); and the sealing block (17) is cooperatively connected to the seat bottom plate (9).

3. A wellhead sealing tool according to claim 2, characterized in that: The well sealing valve (1) further comprises a cover plate (4), wherein the cover plate (4) is arranged above the sealing seat (6).

4. A wellhead sealing tool according to claim 3, characterized in that: The well sealing valve (1) further comprises a lower outer sleeve (5), wherein the lower outer sleeve (5) is sleeved on the outer side of the sealing seat (6) at intervals, and the cover plate (4) is connected to the top end of the lower outer sleeve (5).

5. A wellhead sealing tool according to claim 4, characterized in that: A flange (10) is connected to the top of the outer wall of the seat body (8), and the seat body (8) is connected to the lower outer sleeve (5) via the flange (10).

6. A wellhead sealing tool according to claim 5, characterized in that: A through hole is provided on one side of the outer wall of the seat body (8), and the through hole is communicated with the inner cavity of the seat body (8).

7. A wellhead sealing tool according to claim 3, characterized in that: The wellhead sealing tool also includes a special wrench (11), which includes a wrench rod (12) and a wrench head (13). The wrench rod (12) includes a long rod and a short rod vertically connected to each other, the top end of the short rod is connected to one end of the long rod, and the bottom end of the short rod is connected to the wrench head (13). The bottom of the wrench head (13) is provided with an inner hole matched with the bolt block (15).

8. A wellhead sealing tool according to claim 7, characterized in that: The connection between the long rod and the short rod is a rounded corner.

9. A wellhead sealing tool according to claim 8, characterized in that: The cover plate (4) is provided with a special-shaped hole (14) which matches with a special spanner (11).

10. A wellhead sealing tool according to claim 9, characterized in that: The special-shaped hole (14) comprises a round hole and a strip hole, the round hole and the strip hole are connected, the strip hole matches with the short rod of the wrench rod (12), and the round hole matches with the wrench head (13).

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