CN211422577U - Wellhead sealing device - Google Patents
Wellhead sealing device Download PDFInfo
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- CN211422577U CN211422577U CN201921728115.7U CN201921728115U CN211422577U CN 211422577 U CN211422577 U CN 211422577U CN 201921728115 U CN201921728115 U CN 201921728115U CN 211422577 U CN211422577 U CN 211422577U
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- sealing
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Abstract
The utility model discloses a wellhead sealing device, which comprises a top sealing cover, a sealing flange and a well pipe, wherein the middle part of the top sealing cover is provided with a first through hole; the sealing flange is detachably connected with the top sealing cover, a cavity is formed between the sealing flange and the top sealing cover, and a wellhead flange plate is arranged at the lower end of the sealing flange; the well pipe is arranged in the first through hole, and the well pipe extends downwards into the second through hole of the wellhead flange plate. Because be equipped with a sealing in the cavity, when the well casing inserts in the top closing cap, can make the utility model discloses have good leakproofness.
Description
Technical Field
The utility model particularly relates to a well head sealing device.
Background
In the prior art, because oil extraction technology in other modes is adopted, the traditional wellhead cannot meet the requirements of the existing oil well operation. The existing self-sealing well has a certain potential safety hazard along with the increase of service life and poor sealing effect. The existing oil well in China is a main problem affecting environmental protection and production due to the fact that sealing is not tight and well mouth leakage is caused, gas overflows due to poor sealing performance, the well mouth is polluted, certain danger is brought to operation, and production needs to be stopped immediately if the oil well is severe.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the main object of the present invention is to provide a wellhead sealing device with good sealing performance.
The purpose of the utility model is realized with the following mode:
a wellhead sealing device, comprising:
a top cover;
the sealing flange is detachably connected with the top sealing cover, and a cavity is formed between the sealing flange and the top sealing cover;
the well pipe is arranged in the first through hole of the top sealing cover;
wherein, be equipped with the sealing in the cavity, the sealing includes:
a first seal member coupled to an inner wall of the top closure;
a third seal member coupled to an inner sidewall of the sealing flange;
a second seal disposed in a middle portion within the cavity.
Furthermore, an installation pipe is arranged between the top sealing cover and the sealing flange, and a fixed cylinder is arranged inside the installation pipe.
Further, the first sealing element comprises a first fixing part, a vertical part, an inclined part and a bending part, the first fixing part is arranged between the top sealing cover and the fixed barrel, the outer side of the vertical part is attached to the inside of the fixed barrel, the inclined part is connected to the lower end of the vertical part, and the bending part is connected to the lower end of the inclined part.
Furthermore, the bending part abuts against the outer side wall, and a first sealing cavity is formed among the first sealing element, the top sealing cover and the well pipe.
Further, the second seal is structurally identical to the first seal, and a second seal cavity is formed between the second seal, the first seal and the well casing.
Further, the third sealing element comprises an upper pressing block, an upper bearing plate, a lower bearing plate and a lower pressing block, the upper pressing block is connected with the inner side wall of the sealing flange, the upper bearing plate is adhered to the lower bearing plate, and the lower pressing block is abutted to the lower end of the lower bearing plate.
Furthermore, two ends of the upper bearing plate are respectively pressed against the lower end of the upper pressing block and the inner side wall of the sealing flange, the lower bearing plate is pressed against the outer side wall, and a third sealing cavity is formed among the third sealing element, the second sealing element and the well pipe.
Furthermore, two bolt holes are respectively formed in two ends of the sealing flange.
The utility model has the advantages that: because be equipped with a sealing in the cavity, when the well casing inserts in the top closing cap, can make the utility model discloses have good leakproofness.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
In the drawings:
fig. 1 is a front cross-sectional view of the present invention;
fig. 2 is a partial enlarged view at a of fig. 1;
fig. 3 is a partially enlarged view of fig. 1 at B.
The notation in the figure is: the sealing structure comprises a top sealing cover-10, a first through hole-11, a well pipe-20, an outer side wall-21, a mounting pipe-30, a fixing cylinder-31, a first sealing element-40, a first fixing part-41, a vertical part-42, an inclined part-43, a bent part-44, a first sealing cavity-45, a second sealing element-50, a second sealing cavity-51, a third sealing element-60, a third sealing cavity-61, an upper pressing block-62, an upper bearing plate-63, a lower bearing plate-64, a sealing ball-65, a lower pressing block-66, a sealing flange-70, a bolt hole-71, a wellhead flange-80, a second through hole-81 and a cavity-90.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.
Referring to fig. 1 to 3, a wellhead sealing device as shown in fig. 1 comprises a top cover 10, a sealing flange 70 and a well casing 20, wherein a first through hole 11 is formed in the middle of the top cover 10; the sealing flange 70 is detachably connected with the top cover 10, a cavity 90 is formed between the sealing flange 70 and the top cover 10, and a wellhead flange plate 80 is arranged at the lower end of the sealing flange 70; the well pipe 20 is arranged in the first through hole 11, and the well pipe 20 extends downwards to the second through hole 81 of the wellhead flange plate 80.
In order to improve the sealing performance in the cavity 90, a sealing part is arranged in the cavity 90, the sealing part comprises a first sealing element 40, a third sealing element 60 and a second sealing element 50, and the first sealing element 40 is connected with the inner wall of the top cover 10; the third seal 60 is attached to the inner side wall of the sealing flange 70; the second seal 50 is disposed in the middle of the cavity 90, and the second seal 50 is located between the first seal 40 and the third seal 60.
Preferably, a mounting tube 30 is disposed between the top cover 10 and the sealing flange 70, and a fixed cylinder 31 is disposed inside the mounting tube 30.
As shown in fig. 2, the first sealing member 40 includes a first fixing portion 41, a vertical portion 42, an inclined portion 43, and a bent portion 44, the first fixing portion 41 is disposed between the top cover 10 and the fixed cylinder 31, an outer side of the vertical portion 42 is attached to an inner portion of the fixed cylinder 31, the inclined portion 43 is connected to a lower end of the vertical portion 42, and the bent portion 44 is connected to a lower end of the inclined portion 43.
In order to provide a good seal for the upper part of the well casing 20, the bent portion 44 abuts against the outer sidewall 21, and a first seal cavity 45 is formed between the first seal 40, the top closure 10 and the well casing 20.
Preferably, the second seal 50 is structurally identical to the first seal 40, and a second seal cavity 51 is formed between the second seal 50, the first seal 40 and the well casing. With the above structure, good sealing performance can be achieved against the upper portion of the well pipe 20.
As shown in fig. 3, the third sealing member 60 includes an upper pressing block 62, an upper receiving plate 63, a lower receiving plate 64 and a lower pressing block 66, the upper pressing block 62 is connected to an inner side wall of the sealing flange 70, the upper receiving plate 63 is adhered to the lower receiving plate 64, a sealing ball 65 is further disposed between the upper receiving plate 63 and the lower receiving plate 64, and the lower pressing block 66 abuts against a lower end of the lower receiving plate 64.
In order to improve the sealing performance of the lower part of the well pipe 20, two ends of the upper bearing plate 63 respectively press against the lower end of the upper pressing block 62 and the inner side wall of the sealing flange 70, the lower bearing plate 64 presses against the outer side wall 21, and a third sealing cavity 61 is formed between the third sealing element 60, the second sealing element 50 and the well pipe 20.
Preferably, the sealing flange 70 is provided with a bolt hole 71 at each end.
Because a sealing part is arranged in the cavity 90, when the well pipe 20 is inserted into the top sealing cover 10, the first sealing element 40, the third sealing element 60 and the second sealing element 50 arranged in the cavity 90 abut against the outer side wall 21 through the bent part 44 of the first sealing element 40, and a first sealing cavity 45 is formed among the first sealing element 40, the top sealing cover 10 and the well pipe 20, so that good sealing performance can be formed on the upper part of the well pipe 20; the sealing performance of the middle part of the well casing 20 can be improved by the second seal cavity 51 formed between the second seal 50, the first seal 40 and the well casing; through the third seal 60, the second seal 50 and the third seal chamber 61 formed between the well casing 20, the sealing performance of the lower part of the well casing 20 can be improved, and the utility model discloses have good sealing performance.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A wellhead sealing device, comprising:
a top closure (10);
the sealing flange (70) is detachably connected with the top cover (10), and a cavity (90) is formed between the sealing flange (70) and the top cover (10);
a well pipe (20), the well pipe (20) being arranged in the first through hole (11) of the top closure (10);
wherein, be equipped with the sealing in cavity (90), the sealing includes:
a first sealing member (40), the first sealing member (40) being connected to an inner wall of the top closure (10);
a third seal (60), said third seal (60) being attached to an inner sidewall of said sealing flange (70);
a second seal (50), said second seal (50) being centrally disposed within said cavity (90).
2. A wellhead sealing device according to claim 1, characterized in that a mounting tube (30) is arranged between the top cover (10) and the sealing flange (70), and a fixed cylinder (31) is arranged inside the mounting tube (30).
3. A wellhead sealing device according to claim 2, characterized in that the first sealing member (40) comprises a first fixing portion (41), a vertical portion (42), an inclined portion (43) and a bent portion (44), the first fixing portion (41) is arranged between the top cover (10) and the fixed barrel (31), the outer side of the vertical portion (42) is attached to the inner portion of the fixed barrel (31), the inclined portion (43) is connected to the lower end of the vertical portion (42), and the bent portion (44) is connected to the lower end of the inclined portion (43).
4. A wellhead sealing device according to claim 3, characterized in that the bend (44) abuts against the outer side wall (21) of the well casing (20) and that the first seal (40), the top cover (10) and the well casing (20) form a first sealing chamber (45) therebetween.
5. A wellhead sealing device according to claim 1, characterized in that the second seal (50) is structurally identical to the first seal (40) and that a second seal chamber (51) is formed between the second seal (50), the first seal (40) and the well casing.
6. A wellhead sealing device according to claim 4, characterized in that the third sealing member (60) comprises an upper pressing block (62), an upper bearing plate (63), a lower bearing plate (64) and a lower pressing block (66), the upper pressing block (62) is connected with the inner side wall of the sealing flange (70), the upper bearing plate (63) is adhered with the lower bearing plate (64), and the lower pressing block (66) is abutted with the lower end of the lower bearing plate (64).
7. A wellhead sealing device according to claim 6, characterized in that the two ends of the upper bearing plate (63) respectively press against the lower end of the upper pressing block (62) and the inner side wall of the sealing flange (70), the lower bearing plate (64) presses against the outer side wall (21), and a third sealing cavity (61) is formed among the third sealing element (60), the second sealing element (50) and the well pipe (20).
8. A wellhead sealing device according to claim 1, characterised in that the sealing flange (70) is provided with a bolt hole (71) at each end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921728115.7U CN211422577U (en) | 2019-10-16 | 2019-10-16 | Wellhead sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921728115.7U CN211422577U (en) | 2019-10-16 | 2019-10-16 | Wellhead sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211422577U true CN211422577U (en) | 2020-09-04 |
Family
ID=72249997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921728115.7U Active CN211422577U (en) | 2019-10-16 | 2019-10-16 | Wellhead sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211422577U (en) |
-
2019
- 2019-10-16 CN CN201921728115.7U patent/CN211422577U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220927 Address after: 163000 6-10-shangfu 3, township industrial development community, Ranghulu District, Daqing City, Heilongjiang Province Patentee after: Daqing Honglei mechanical equipment manufacturing Co.,Ltd. Address before: No.753, Liucheng Liudong, Nanan City, Quanzhou City, Fujian Province, 362000 Patentee before: NANAN PINGFENG AGRICULTURAL SCIENCE AND TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |