CN108360997B - Annular sealing assembly device for deep water - Google Patents
Annular sealing assembly device for deep water Download PDFInfo
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- CN108360997B CN108360997B CN201810439188.8A CN201810439188A CN108360997B CN 108360997 B CN108360997 B CN 108360997B CN 201810439188 A CN201810439188 A CN 201810439188A CN 108360997 B CN108360997 B CN 108360997B
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- sealing
- ring
- seal
- elastomer
- assembly device
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- 238000007789 sealing Methods 0.000 title claims abstract description 119
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229920001971 elastomer Polymers 0.000 claims description 34
- 238000007906 compression Methods 0.000 claims description 31
- 239000000806 elastomer Substances 0.000 claims description 31
- 230000006835 compression Effects 0.000 claims description 30
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 12
- 238000005553 drilling Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 11
- 239000003208 petroleum Substances 0.000 abstract description 5
- 230000009471 action Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Gasket Seals (AREA)
Abstract
The invention relates to the technical field of petroleum drilling sealing devices, in particular to an annular sealing assembly device for deep water, which is used for locking between a casing string and a high-pressure well head to realize sealing and locking of annular space between the high-pressure well head and the casing string. The annular sealing assembly device for deep water, provided by the invention, has the advantages of better annular sealing effect, easiness in realizing high-pressure metal-to-metal sealing and longer service life, and meets the market demands of deep water drilling and completion.
Description
Technical Field
The invention relates to the technical field of petroleum drilling sealing devices, in particular to an annular sealing assembly device for deep water.
Background
As the ocean develops into deep water, offshore oil drilling operations have moved to deep water. The deep water oil development of China is well-done in the market continuously, but the deep water oil drilling and completion equipment market is almost the first color import equipment in the longitudinal deep water oil drilling and completion equipment market, namely the equipment market is fully occupied by foreign manufacturers, the annular sealing is also the crucial equipment in the equipment, the annular sealing is used for sealing the annular space between each layer of sleeve hanger and the high-pressure wellhead, and the sealing device directly relates to the safety of the whole drilling operation and the safety of the drilling platform because the sealing device is used for deep water operation and has complex environmental conditions. The well head equipment is a core component of the whole well head equipment, is produced by foreign factories in the current market at home and abroad, is severely restricted to the development of deep water petroleum in our country, comprises the technical monopoly of the deep water petroleum, cannot be timely and effectively supported by our technical support, is high in price and has long delivery cycle.
Therefore, domestic research and development are urgently needed for well drilling and completion wellhead equipment, while individual factories in China simulate annular sealing devices, products are different from each other in terms of structures of using the products in the market, but the products are still not accepted in the market, and all the products adopt the method that an elastomer is extruded by gravity so as to promote a metal lip to realize metal-to-metal sealing. The sealing effect of such seals is relatively easy to achieve, but as the period of petroleum development is lengthened, the elastomer is susceptible to aging failure, resulting in failure of the metal-to-metal seal. Aiming at the situation, the inventor designs an annular sealing assembly device for deep water, which has better annular sealing effect, is easier to realize high-pressure metal-to-metal sealing and has longer service life, so as to meet the market demand of deep water drilling and completion.
Disclosure of Invention
In view of the problems, the invention provides the annular sealing assembly device for deep water, which has better annular sealing effect, is easy to realize high-pressure metal-to-metal sealing and has longer service life.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention relates to an annular sealing assembly device for deep water, which is locked between a casing string and a high-pressure well head to realize the sealing and locking of an annular space between the high-pressure well head and the casing string, the annular sealing assembly device for deep water comprises a sealing lower body, a main body, a compression ring, an external lock ring and an internal lock ring, the compression ring is clamped between the main body and the sealing lower body, the sealing lower body is connected with the main body through threads and an external contour corner,
the fixing pin is arranged between the pressing ring and the main body, the fixing pin can be sheared by external force, the pressing ring is provided with a pressing ring outer contour surface, a pressing ring step surface, a pressing ring lower end surface and a pressing ring inner surface, the inner locking ring is provided with an inner locking ring upper inclined surface, the pressing ring lower end surface is extruded in contact with the inner locking ring upper inclined surface, the outer locking ring is provided with an outer locking ring inner side surface and an outer locking ring step surface, the pressing ring outer contour surface is clamped with the outer locking ring inner side surface, the outer locking ring step surface is extruded in contact with the pressing ring step surface, the middle part of the main body is provided with an inner side step, the inner side wall of the high-pressure wellhead is provided with a groove, the inner side top of the sleeve hanger is provided with an outer side end surface, and the upper end of the sleeve hanger is also provided with a clamping groove,
the utility model discloses a well head, including sealed lower body, upper body, lower body, be equipped with the inclined plane on the lower inboard end of sealed lower body, the inclined plane can cooperate with the casing string, the inboard is equipped with down inboard bump under sealed lower body, the top of inboard bump is equipped with first main seal bump and second main seal bump in proper order down, the below of first main seal bump is equipped with first main seal bump elastomer, the top of second main seal bump is equipped with second main seal bump elastomer, the outside lower part of sealed lower body is equipped with down finger type seal and last finger type seal, the top of going up finger type seal is the sealing point, it realizes compressing tightly with the inside cooperation of the wellhead of high-pressure wellhead to go up the sealing point, the top of finger type seal is down sealing point, the cooperation of sealing point and the wellhead lower part of high-pressure wellhead realizes compressing tightly and sealing.
Further, the lower finger type seal and the upper finger type seal are connected in a V shape.
Further, the thread is a square thread.
Further, the first main sealing bump elastomer, the second main sealing bump elastomer, the first elastomer and the second elastomer may be rubber fillers.
Further, the groove is a locking ring groove and is used for clamping an external locking ring to lock the annular sealing assembly device and the casing hanger.
Furthermore, the materials of the sealing lower body, the main body, the compression ring, the external locking ring and the internal locking ring are all made of corrosion-resistant alloy steel.
The invention has the advantages and beneficial effects that: the annular sealing assembly device for deep water, which has better annular sealing effect, is easier to realize high-pressure metal-to-metal sealing and has longer service life, meets the market demands of deep water drilling and completion. Specifically, the product of the invention has better sealing effect through finger-type sealing, and is easier to realize high pressure and realize metal-to-metal sealing; the sealing effect is better through the auxiliary extrusion of the elastomer; through different angle changes of the profile surface of the outer side of the sleeve hanger, the sealing part is promoted to realize tighter metal-to-metal sealing, the stress deformation of the sealing part can be changed, and the tendency of stress concentration is reduced; the annular sealing lock can be locked between the high-pressure wellhead and the sleeve hanger at the same time by one-time pressing of the pressing ring, and a certain pre-tightening load is provided by the structure of the locking ring and the locking ring groove in the locking process, so that a better sealing effect is ensured.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of an annular seal assembly for deep water.
Description of the reference numerals
1. High-pressure wellhead 2, compression ring 3, lock ring groove 4, external lock ring 5 and screw thread
6. The outer contour surface 7 of the compression ring, the inner side surface 8 of the outer lock ring, the step surface 9 of the compression ring and the step surface of the outer lock ring
10. The outer contour corner 11, the main body 12, the inner step 13, the outer end face 14 and the lower end face of the compression ring
15. Inner lock ring upper inclined surface 16, inner lock ring 17, compression ring inner surface 18, sleeve hanger
19. First Main seal bump 20. First Main seal bump elastomer
21. Second Main seal bump elastomer 22. Second Main seal bump 23. Lower inner bump
24. Inclined surface 25, lower inner end 26, sealing lower body 27, lower sealing point
28. Wellhead lower portion 29, upper seal point 30, wellhead inner side 31, first elastomer
32. Lower finger seal 33, upper finger seal 34, second elastic body 35, fixing pin 36, clamping groove
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
The annular sealing assembly device for deep water is locked between a casing hanger 18 and a high-pressure wellhead 1, annular space sealing and locking of the high-pressure wellhead 1 and the casing hanger 18 are achieved, the annular sealing assembly device for deep water comprises a sealing lower body 26, a main body 11, a compression ring 2, an outer locking ring 4 and an inner locking ring 16, the compression ring 2 is clamped between the main body 11 and the sealing lower body 26, and the sealing lower body 26 is connected with the main body 11 through threads 5 and an outer contour corner 10.
A fixed pin 35 is arranged between the compression ring 2 and the main body 11, the fixed pin 35 can be sheared by external force, the compression ring 2 is provided with a compression ring outer contour surface 6, a compression ring step surface 8, a compression ring lower end surface 14 and a compression ring inner surface 17, the inner lock ring 16 is provided with an inner lock ring upper inclined surface 15, the compression ring lower end surface 14 is contacted and extruded with the inner lock ring upper inclined surface 15, the outer lock ring 4 is provided with an outer lock ring inner side surface 7 and an outer lock ring step surface 9, the compression ring outer contour surface 6 is clamped with the outer lock ring inner side surface 7, the outer lock ring step surface 9 is contacted and extruded with the compression ring step surface 8, the middle part of the main body 11 is provided with an inner side step 12, the inner side wall of the high-pressure well head 1 is provided with a groove, the inner side top of the sleeve hanger 18 is provided with an outer side end surface 13, the upper end of the sleeve hanger 18 is also provided with a clamping groove 36, the lower inner side end 25 of the sealing lower body 26 is provided with an inclined surface 24, the inclined surface 24 can be matched with the sleeve hanger 18, the inner side of the sealing lower body 26 is provided with a lower inner side bump 23, a first main sealing bump 19 and a second main sealing bump 22 are sequentially arranged above the lower inner side bump 23, a first main sealing bump elastomer 20 is arranged below the first main sealing bump 19, a second main sealing bump elastomer 21 is arranged above the second main sealing bump 22, a lower finger type seal 32 and an upper finger type seal 33 are arranged at the lower outer side lower part of the sealing lower body 26, a second elastomer 34 is arranged above the upper finger type seal 33, a first elastomer 31 is arranged below the lower finger type seal 32, an upper sealing point 29 is arranged at the top of the upper finger type seal 33, the upper sealing point 29 is matched with the inner side 30 of the wellhead of the high-pressure wellhead 1 to realize compression sealing, a lower sealing point 27 is arranged at the top of the lower finger type seal 32, and the lower end 28 of the wellhead of the high-pressure wellhead 1 is matched with the lower sealing point 27 to realize compression sealing.
The lower finger seal 32 and the upper finger seal 33 are coupled in a "V" shape. The thread 5 is a square thread. The first main seal bump elastomer 20, the second main seal bump elastomer 21, the first elastomer 31, and the second elastomer 34 may be rubber fillers. The groove is a locking ring groove 3 for clamping the external locking ring 4, so as to realize the locking of the annular sealing assembly device and the casing hanger 18. The materials of the sealing lower body 26, the main body 11, the compression ring 2, the external locking ring 4 and the internal locking ring 16 are all made of corrosion-resistant alloy steel.
In operation, as shown in fig. 1, the running tool presses the annular seal into place by applying force F1 to the main body 11, i.e., the inside step 12 of the main body 11 sits on the upper outside end face 13 of the casing hanger 18. The sealing lower body 26 runs downwards along the outer side surface of the sleeve hanger in the pressing process, meanwhile, the sealing lower body 26 also deforms towards the high-pressure wellhead direction in the radial direction, and the lower inner side convex point 23 of the sealing lower body 26 can protect the first main sealing convex point 19 and the second main sealing convex point 22 in the moving down process. When the lower inner convex point 23 moves down to the sleeve hanging outer contour corner 10, the first main sealing convex point 19 and the second main sealing convex point 22 can be tightly pressed with the sleeve hanging outer contour surface, so that metal-to-metal sealing is realized. At the same time, the first main sealing bump elastomer 20 and the second main sealing bump elastomer 21 are also installed at the sealing bumps, and they will generate a further extrusion trend to the first main sealing bump 19 and the second main sealing bump 22 during the compression process, so that the sealing effect is better.
Meanwhile, the upper sealing point 29 and the lower sealing point 27 of the upper finger type seal 33 and the lower finger type seal 32 can realize metal-to-metal sealing with the inner side 30 of the high-pressure wellhead and the lower portion 28 of the wellhead under the extrusion action of the lower body 26, and the second elastic body 34 and the first elastic body 31 are installed on the inner sides of the upper finger type seal 33 and the lower finger type seal 32 of the sealing main body, so that an auxiliary action can be realized in the extrusion process, and the upper sealing point 29 and the lower sealing point 27 are respectively pressed further with the inner side 30 of the wellhead and the lower portion 28 of the wellhead, so that the sealing effect is better. In addition, the inclined surface 24 matched with the sleeve hanger 18 is designed at the lower inner side end 25 of the sealing lower body 26, and the matching can form a movement trend of the lower end towards the upper outer direction for the sealing lower body 26, and the trend can promote the sealing of the inner convex point and the outer convex point of the sealing lower body, the outer contour of the sleeve hanger and the inner sealing surface of the high-pressure wellhead to be further enhanced. The inner and outer elastomers herein only act to strengthen the metal-to-metal seal during the press-in process, and do not directly produce a sealing effect.
The annular sealing lower body 26 is connected with the main body 11 through the threads 5 and the outer contour corner 10, and the compression ring 2 is clamped between the main body 11 and the sealing lower body 26. After the annular seal lower body 26 is pressed in place under the action of the F1, the action force of the F2 is applied to the compression ring 2 through the feeding tool, the fixing pin 35 is sheared, the outer lock ring 4 is pushed to move radially outwards under the action of the compression ring step surface 8 and the outer lock ring step surface 9, the outer profile surface 6 of the compression ring is clamped into the inner side surface 7 of the outer lock ring, so that the outer lock ring 4 is pressed into the lock ring groove 3 of the high-pressure wellhead 1, and the annular seal and the high-pressure wellhead 1 are locked. At the same time, the inner lock ring upper inclined surface 15 is pushed on the lower end surface 14 of the compression ring, so that the inner lock ring 16 moves radially inwards, and the inner lock ring 16 is clamped into the clamping groove 36 of the sleeve hanger. At this point, the inner surface 17 of the press ring cooperates with the outer contoured surface of the inner lock ring 16 to retain the annular seal within the retaining groove 36 of the hanger 18, thereby locking the annular seal to the hanger.
Thus, the annular seal is pressed into place by the two actions of the running tool and locked between the casing string 18 and the high pressure wellhead 1, effecting the annular space seal and locking of the high pressure wellhead 1 and the casing string 18.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. The annulus seal assembly device for deep water is characterized in that the annulus seal assembly device for deep water is locked between a casing string and a high-pressure well head to realize the sealing and locking of an annular space between the high-pressure well head and the casing string, the annulus seal assembly device for deep water comprises a seal lower body, a main body, a compression ring, an external lock ring and an internal lock ring, the compression ring is clamped between the main body and the seal lower body, the seal lower body is connected with the main body through threads and an external contour corner,
the fixing pin is arranged between the pressing ring and the main body, the pressing ring is provided with a pressing ring outer contour surface, a pressing ring step surface, a pressing ring lower end surface and a pressing ring inner surface, the inner locking ring is provided with an inner locking ring upper inclined surface, the pressing ring lower end surface is extruded in contact with the inner locking ring upper inclined surface, the outer locking ring is provided with an outer locking ring inner side surface and an outer locking ring step surface, the pressing ring outer contour surface is clamped with the outer locking ring inner side surface, the outer locking ring step surface is extruded in contact with the pressing ring step surface, the middle part of the main body is provided with an inner side step, the inner side wall of the high-pressure wellhead is provided with a groove, the inner top of the sleeve hanger is provided with an outer side end surface, and the upper end of the sleeve hanger is also provided with a clamping groove,
the lower inner side end of the sealing lower body is provided with an inclined plane which is matched with the sleeve hanger, the inner side of the sealing lower body is provided with a lower inner side salient point, a first main sealing salient point and a second main sealing salient point are sequentially arranged above the lower inner side salient point, a first main sealing salient point elastomer is arranged below the first main sealing salient point, a second main sealing salient point elastomer is arranged above the second main sealing salient point, a lower finger type seal and an upper finger type seal are arranged at the lower part of the outer side of the sealing lower body, the top of going up the finger type is sealed is equipped with the second elastomer, the below of going up the finger type is sealed is equipped with first elastomer, go up the sealed top of finger type and be last sealing point, go up sealing point and the inside cooperation of the well head of high-pressure wellhead and realize compressing tightly sealedly, the sealed top of lower finger type is sealing point down, lower sealing point and the cooperation of the well head lower part of high-pressure wellhead realize compressing tightly sealedly, lower finger type seal and the sealed hookup of last finger type are "V" style of calligraphy, the screw thread is square screw thread.
2. The annular seal assembly apparatus for deep water of claim 1, wherein the first primary seal bump elastomer, the second primary seal bump elastomer, the first elastomer and the second elastomer are rubber fillers.
3. The deepwater annulus seal assembly device of claim 1, wherein the groove is a locking ring groove for locking an external locking ring to lock the annulus seal assembly device to the casing hanger.
4. The deepwater annulus seal assembly device according to claim 1, wherein the lower seal body, the main body, the compression ring, the outer lock ring and the inner lock ring are made of corrosion-resistant alloy steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810439188.8A CN108360997B (en) | 2018-05-09 | 2018-05-09 | Annular sealing assembly device for deep water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810439188.8A CN108360997B (en) | 2018-05-09 | 2018-05-09 | Annular sealing assembly device for deep water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108360997A CN108360997A (en) | 2018-08-03 |
| CN108360997B true CN108360997B (en) | 2024-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810439188.8A Active CN108360997B (en) | 2018-05-09 | 2018-05-09 | Annular sealing assembly device for deep water |
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| Country | Link |
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| CN (1) | CN108360997B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763789A (en) * | 2019-01-29 | 2019-05-17 | 上海霞为石油设备技术服务有限公司 | A kind of ring packing assembly apparatus |
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| CN102852482A (en) * | 2011-06-30 | 2013-01-02 | 韦特柯格雷公司 | Hybrid seal |
| CN103147713A (en) * | 2011-12-06 | 2013-06-12 | 韦特柯格雷公司 | Seal with bellows style nose ring and radially drivable lock rings |
| AU2013206282A1 (en) * | 2008-08-19 | 2013-07-04 | Aker Solutions Inc. | Tubing hanger seal |
| CN203271659U (en) * | 2013-05-17 | 2013-11-06 | 宝鸡石油机械有限责任公司 | Rotate-pressing type metallic seal assembly used for marine dry wellhead |
| CN107269244A (en) * | 2017-08-18 | 2017-10-20 | 上海霞为石油设备技术服务有限公司 | Ring packing assembly |
| CN208310730U (en) * | 2018-05-09 | 2019-01-01 | 上海霞为石油设备技术服务有限公司 | A kind of new type of deep-water annular space seal assembly device |
-
2018
- 2018-05-09 CN CN201810439188.8A patent/CN108360997B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2013206282A1 (en) * | 2008-08-19 | 2013-07-04 | Aker Solutions Inc. | Tubing hanger seal |
| CN102852482A (en) * | 2011-06-30 | 2013-01-02 | 韦特柯格雷公司 | Hybrid seal |
| CN103147713A (en) * | 2011-12-06 | 2013-06-12 | 韦特柯格雷公司 | Seal with bellows style nose ring and radially drivable lock rings |
| CN203271659U (en) * | 2013-05-17 | 2013-11-06 | 宝鸡石油机械有限责任公司 | Rotate-pressing type metallic seal assembly used for marine dry wellhead |
| CN107269244A (en) * | 2017-08-18 | 2017-10-20 | 上海霞为石油设备技术服务有限公司 | Ring packing assembly |
| CN208310730U (en) * | 2018-05-09 | 2019-01-01 | 上海霞为石油设备技术服务有限公司 | A kind of new type of deep-water annular space seal assembly device |
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| Publication number | Publication date |
|---|---|
| CN108360997A (en) | 2018-08-03 |
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