Leakage-proof structure and forging water injection wellhead device

Abstract

The utility model relates to the technical field of oil exploitation, in particular to a leakage-proof structure which comprises a fixing plate, a rubber ring is arranged in the fixing plate, a jacking assembly is arranged in the fixing plate, and one end of the jacking assembly makes contact with the surface of the rubber ring. An adjusting assembly is movably connected to the side face of the fixing plate in an inserted mode, a linkage rod is arranged in the fixing plate and penetrates through the jacking assembly, and the adjusting assembly makes contact with one end of the linkage rod; a limiting assembly is arranged on the surface of the adjusting assembly and fixes the adjusting assembly. The device has the beneficial effects that under the action of two groups of elastic ropes, two groups of linkage rods are always in contact with two groups of adjusting columns, so that when the distance between the two groups of linkage rods is shortened, the two groups of linkage rods can respectively drive one mounting block in the corresponding six groups of mounting blocks to move, the distance between one group of mounting blocks is shortened, the elastic force of a supporting spring is enhanced, and the service life of the supporting spring is prolonged. And the supporting spring achieves the best jacking effect on the rubber ring.

Description

Technical Field

[0001] The utility model relates to the field of petroleum exploitation, in particular to a leak-proof structure and a forged water injection wellhead device. Background Art

[0002] Injection wells are wells used to inject water into oil layers. During the development of an oil field, water is injected into the reservoir through a special injection well to maintain or restore the reservoir pressure, giving the reservoir a stronger driving force to increase the production rate and recovery rate of the reservoir.

[0003] In the prior art, the patent "A sealing and leak-proof device for a bare rod at an oil production wellhead" with application number CN202122143883.X can effectively prevent oil leakage when the water injection wellhead device is in use; and this patent points out that the spiral sealing strip on the inner wall of the rubber tube fits tightly with the side of the bare rod, and at the same time, under the action of the spring, the inner ring surface of the second annular sealing ring fits tightly with the side of the bare rod, thereby achieving the purpose of two-stage sealing of the bare rod, thereby increasing the sealing performance of the sealing and leak-proof device for the bare rod at the oil production wellhead, which can effectively prevent oil and oil gas from leaking along the bare rod, and further ensure that oil production work can be carried out safely.

[0004] However, the sealing effect is achieved by holding the annular sealing ring with a spring. With long-term use, the elastic force of the spring will weaken, and the holding effect on the annular sealing ring will also weaken, thereby weakening the sealing effect and the leak-proof effect cannot be achieved. Utility Model Content

[0005] The purpose of the utility model is to provide a leak-proof structure and a forged water injection wellhead device to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a leak-proof structure, which includes: a fixed plate, a rubber ring is arranged inside the fixed plate, a supporting assembly is arranged inside the fixed plate, and one end of the supporting assembly contacts the surface of the rubber ring; and an adjusting assembly is movably inserted into the side of the fixed plate, a linkage rod is arranged inside the fixed plate, the linkage rod passes through the supporting assembly, and the adjusting assembly contacts one end of the linkage rod; a limit assembly is arranged on the surface of the adjusting assembly, and the limit assembly fixes the adjusting assembly.

[0007] Preferably, the fixing plate is an annular hollow structure, the rubber ring is annular, and a limiting groove is provided on the outer ring surface of the rubber ring.

[0008] Preferably, the supporting assembly includes a mounting block and a supporting spring, the mounting block is an arc-shaped plate structure, twelve groups of mounting blocks are provided, one group of mounting blocks includes two mounting blocks, the supporting spring is fixed between the two mounting blocks, and one mounting block in a group of mounting blocks is movably inserted in the limiting card slot, and the twelve groups of mounting blocks are distributed in a circular array about the center of the rubber ring.

[0009] Preferably, the linkage rod is an arc-shaped column structure, and two groups of linkage rods are provided, and one group of linkage rods passes through another mounting block in the six adjacent groups of mounting blocks.

[0010] Preferably, the adjustment assembly includes an adjustment column and an integrated rod, the adjustment column is a conical column structure, the integrated rod is movably plugged into the side of the fixed plate, and two groups of adjustment columns are provided, and the two groups of adjustment columns are respectively in contact with one end of the two groups of linkage rods.

[0011] Preferably, an elastic cord is arranged between one end of the two groups of linkage rods, and two groups of elastic cords are arranged, the two groups of elastic cords are symmetrically distributed about the center of the adjustment column, and the two groups of elastic cords are in contact with the surface of the adjustment column.

[0012] Preferably, the limit assembly includes a limit block and a fixed rod, a sliding groove is opened on the surface of the integrated rod, the sliding groove is a "T"-shaped plate-like groove structure, the limit block is an "L"-shaped plate-like structure, the limit block is slidably connected in the sliding groove, and two groups of limit blocks are provided, and the two groups of limit blocks are symmetrically distributed about the center of the integrated rod.

[0013] Preferably, the fixing rod is in a circular cylindrical structure, the fixing rod passes through two sets of limit blocks, and a spring is arranged between the two sets of limit blocks, and the spring is sleeved on the surface of the fixing rod.

[0014] Preferably, a positioning side plate is integrally formed on the surface of the fixed plate, one end of the limit block is movably inserted in the positioning groove, the positioning groove is provided on one side of the positioning side plate, and there are multiple groups of positioning grooves, the multiple groups of positioning grooves are distributed in a linear array, and a finger groove is provided on the side of the other end of the limit block, and a damping protrusion is provided on the surface of the finger groove.

[0015] A forged water injection wellhead device comprises the leak-proof structure.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The leak-proof structure proposed by the utility model has the following advantages: under the action of two sets of elastic ropes, the two sets of linkage rods will always be in contact with the two sets of adjusting columns, so that when the distance between the two sets of linkage rods is shortened, the two sets of linkage rods will respectively drive one of the corresponding six sets of mounting blocks to move, shortening the distance between one set of mounting blocks (two mounting blocks), strengthening the elastic force of the supporting spring, making the supporting spring achieve the best supporting effect on the rubber ring, and also ensuring that the rubber ring has a better leak-proof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a partial cross-sectional schematic diagram of the overall structure of the regulating column of the utility model;

[0020] Figure 3 It is a partial cross-sectional schematic diagram of the overall structure of the utility model;

[0021] Figure 4 for Figure 3 Enlarged schematic diagram at point A in the middle.

[0022] In the figure: a fixing plate 1, a rubber ring 2, a limiting slot 3, a mounting block 4, a supporting spring 5, a linkage rod 6, an elastic rope 7, an adjusting column 8, an integrated rod 9, a sliding slot 10, a limiting block 11, a fixing rod 12, a positioning slot 13, a positioning side plate 14, and a finger slot 15. DETAILED DESCRIPTION

[0023] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1

[0025] See also Figure 1-Figure 4 The utility model provides a technical solution: a leakage-proof structure, the leakage-proof structure comprising: a fixed plate 1, a rubber ring 2 is arranged inside the fixed plate 1, a supporting assembly is arranged inside the fixed plate 1, one end of the supporting assembly contacts the surface of the rubber ring 2; and an adjusting assembly is movably inserted on the side of the fixed plate 1, a linkage rod 6 is arranged inside the fixed plate 1, the linkage rod 6 passes through the supporting assembly, and the adjusting assembly contacts one end of the linkage rod 6; a limit assembly is arranged on the surface of the adjusting assembly, and the limit assembly fixes the adjusting assembly; under the action of two sets of elastic ropes 7, the two sets of linkage rods 6 will always contact the two sets of adjustment columns 8, so that when the distance between the two sets of linkage rods 6 is shortened, the two sets of linkage rods 6 will respectively drive one of the corresponding six sets of mounting blocks 4 to move, shorten the distance between one set of mounting blocks 4 (two mounting blocks 4), strengthen the elastic force of the supporting spring 5, so that the supporting spring 5 can achieve the best supporting effect on the rubber ring 2, and can also ensure that the rubber ring 2 has a better leakage-proof effect.

[0026] Embodiment 2

[0027] On the basis of the first embodiment, the fixing plate 1 is an annular hollow structure, the rubber ring 2 is annular, and the outer ring surface of the rubber ring 2 is provided with a limited card slot 3, the top holding component includes a mounting block 4 and a support spring 5, the mounting block 4 is an arc-shaped plate structure, the mounting block 4 is provided with twelve groups, one group of mounting blocks 4 includes two mounting blocks 4, the support spring 5 is fixed between the two mounting blocks 4, and one mounting block 4 in a group of mounting blocks 4 is movably inserted in the limited card slot 3, the twelve groups of mounting blocks 4 are distributed in a circular array about the center of the rubber ring 2, the linkage rod 6 is an arc-shaped column structure, the linkage rod 6 is provided with two groups, one group of linkage rods 6 passes through another mounting block 4 in the adjacent six groups of mounting blocks 4, the adjustment component includes an adjustment column 8 and an integrated rod 9, the adjustment column 8 is a conical column structure, and the integrated rod 9 is movably inserted On the side of the fixed plate 1, two groups of adjusting columns 8 are provided, and the two groups of adjusting columns 8 are respectively in contact with one end of the two groups of linkage rods 6. An elastic rope 7 is provided between one end of the two groups of linkage rods 6. Two groups of elastic ropes 7 are provided, and the two groups of elastic ropes 7 are symmetrically distributed about the center of the adjusting column 8, and the two groups of elastic ropes 7 are in contact with the surface of the adjusting column 8; under the action of the two groups of elastic ropes 7, the two groups of linkage rods 6 will always be in contact with the two groups of adjusting columns 8, so that when the distance between the two groups of linkage rods 6 is shortened, the two groups of linkage rods 6 will respectively drive one of the corresponding six groups of mounting blocks 4 to move, shorten the distance between one group of mounting blocks 4, strengthen the elastic force of the supporting spring 5, so that the supporting spring 5 can achieve the best supporting effect on the rubber ring 2, and can also ensure that the rubber ring 2 has a better anti-leakage effect.

[0028] Embodiment 3

[0029] On the basis of the second embodiment, the limit assembly includes a limit block 11 and a fixed rod 12. A sliding groove 10 is provided on the surface of the integrated rod 9. The sliding groove 10 is a "T"-shaped plate-shaped groove structure. The limit block 11 is an "L"-shaped plate-shaped structure. The limit block 11 is slidably connected in the sliding groove 10. The limit block 11 is provided with two groups. The two groups of limit blocks 11 are symmetrically distributed about the center of the integrated rod 9. The fixed rod 12 is a circular columnar structure. The fixed rod 12 passes through the two groups of limit blocks 11, and a spring is provided between the two groups of limit blocks 11. The spring is sleeved on the surface of the fixed rod 12. The surface of the fixed plate 1 is integrally formed with a positioning side plate 14. One end of the limit block 11 is movable Inserted in the positioning groove 13, the positioning groove 13 is opened on one side of the positioning side plate 14, and the positioning groove 13 is opened in multiple groups, and the multiple groups of positioning grooves 13 are distributed in a linear array, and a finger groove 15 is opened on the side of the other end of the limit block 11, and a damping protrusion is provided on the surface of the finger groove 15. Pressing the finger groove 15 with a finger makes one end of the limit block 11 disengage from the positioning groove 13 and pull the limit block 11 away from the fixed plate 1. In the process of the limit block 11 being pulled out, the limit block 11 will drive the integrated rod 9 and the adjusting column 8 to be pulled out, so that the two groups of linkage rods 6 will contact the surface of the adjusting column 8 with a smaller diameter, thereby shortening the distance between the two groups of linkage rods 6.

[0030] A forged water injection wellhead device comprises the leak-proof structure.

[0031] In actual use, the finger is pressed on the finger groove 15 so that one end of the limit block 11 is disengaged from the positioning groove 13 and the limit block 11 is pulled out in the direction away from the fixed plate 1. In the process of the limit block 11 being pulled out, the limit block 11 will drive the integrated rod 9 and the adjustment column 8 to be pulled out, so that the two sets of linkage rods 6 will contact the surface of the adjustment column 8 with a smaller diameter, thereby shortening the distance between the two sets of linkage rods 6; under the action of the two sets of elastic ropes 7, the two sets of linkage rods 6 will always contact the two sets of adjustment columns 8, thereby facilitating the distance between the two sets of linkage rods 6 When shortened, the two groups of linkage rods 6 will respectively drive one of the corresponding six groups of mounting blocks 4 to move, shortening the distance between one group of mounting blocks 4, thereby strengthening the elastic force of the support spring 5, enabling the support spring 5 to achieve the best supporting effect on the rubber ring 2, and also ensuring that the rubber ring 2 has a better leakage-proof effect; multiple groups of positioning grooves 13 facilitate multiple strengthening of the elastic force of the support spring 5, making full use of the support spring 5, and preventing the support spring 5 from weakening in elastic force after being used for a period of time, thereby failing to achieve the best supporting effect on the rubber ring 2.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A leak-proof structure, characterized in that: The anti-leakage structure comprises: a fixed plate (1), a rubber ring (2) is arranged inside the fixed plate (1), a supporting assembly is arranged inside the fixed plate (1), one end of the supporting assembly is in contact with the surface of the rubber ring (2); an adjusting assembly is movably plugged into the side of the fixed plate (1), a linkage rod (6) is arranged inside the fixed plate (1), the linkage rod (6) passes through the supporting assembly, and the adjusting assembly is in contact with one end of the linkage rod (6); a limiting assembly is arranged on the surface of the adjusting assembly, and the limiting assembly fixes the adjusting assembly.

2. A leak-proof structure according to claim 1, characterized in that: The fixing plate (1) is an annular hollow structure, the rubber ring (2) is annular, and a limiting groove (3) is provided on the outer ring surface of the rubber ring (2).

3. A leak-proof structure according to claim 1, characterized in that: The supporting assembly comprises a mounting block (4) and a supporting spring (5); the mounting block (4) is an arc-shaped plate-shaped structure; the mounting blocks (4) are provided in twelve groups; one group of mounting blocks (4) comprises two mounting blocks (4); the supporting spring (5) is fixed between the two mounting blocks (4); and one mounting block (4) in a group of mounting blocks (4) is movably inserted into a limiting card slot (3); and the twelve groups of mounting blocks (4) are distributed in a circular array about the center of the rubber ring (2).

4. The anti-leakage structure according to claim 1, characterized in that: The linkage rod (6) is in the form of an arc-shaped columnar structure. Two groups of linkage rods (6) are provided, and one group of linkage rods (6) passes through another mounting block (4) in the six adjacent groups of mounting blocks (4).

5. The anti-leakage structure according to claim 1, characterized in that: The adjustment assembly comprises an adjustment column (8) and an integrated rod (9); the adjustment column (8) is a conical column structure; the integrated rod (9) is movably plugged into the side of the fixed plate (1); two groups of adjustment columns (8) are provided; the two groups of adjustment columns (8) are respectively in contact with one end of the two groups of linkage rods (6).

6. A leak-proof structure according to claim 5, characterized in that: An elastic cord (7) is arranged between one end of the two groups of linkage rods (6), and two groups of elastic cords (7) are arranged. The two groups of elastic cords (7) are symmetrically distributed about the center of the adjustment column (8), and both groups of elastic cords (7) are in contact with the surface of the adjustment column (8).

7. The anti-leakage structure according to claim 1, characterized in that: The limit assembly comprises a limit block (11) and a fixed rod (12); a sliding groove (10) is provided on the surface of the integrated rod (9); the sliding groove (10) is in a T-shaped plate-like groove structure; the limit block (11) is in an L-shaped plate-like structure; the limit block (11) is slidably connected in the sliding groove (10); two groups of limit blocks (11) are provided; and the two groups of limit blocks (11) are symmetrically distributed about the center of the integrated rod (9).

8. The anti-leakage structure according to claim 7, characterized in that: The fixing rod (12) is in the form of a circular columnar structure. The fixing rod (12) passes through two groups of limit blocks (11). A spring is provided between the two groups of limit blocks (11), and the spring is sleeved on the surface of the fixing rod (12).

9. The anti-leakage structure according to claim 1, characterized in that: The surface of the fixing plate (1) is integrally formed with a positioning side plate (14); one end of the limiting block (11) is movably inserted into the positioning groove (13); the positioning groove (13) is provided on one side of the positioning side plate (14); and there are multiple groups of positioning grooves (13); the multiple groups of positioning grooves (13) are distributed in a linear array; and a finger groove (15) is provided on the side surface of the other end of the limiting block (11); and a damping protrusion is provided on the surface of the finger groove (15).

10. A forged water injection wellhead device, characterized in that: The invention comprises the leakage-proof structure as described in any one of claims 1 to 9.

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