CN210087283U - Slip sealing structure - Google Patents
Slip sealing structure Download PDFInfo
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- CN210087283U CN210087283U CN201920809829.4U CN201920809829U CN210087283U CN 210087283 U CN210087283 U CN 210087283U CN 201920809829 U CN201920809829 U CN 201920809829U CN 210087283 U CN210087283 U CN 210087283U
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Abstract
The utility model provides a slip seal structure, includes the sealed body of tube-shape, sealed body includes up end and lower terminal surface the outside of at least arbitrary terminal surface of sealed body is equipped with the outer retaining ring of metal and is equipped with the retaining ring in the metal in the inboard of this terminal surface, is setting be equipped with the double-layered cloth coating on the terminal surface of the outer retaining ring of metal and the interior retaining ring of metal, the outer retaining ring of metal support press in the outer flange of double-layered cloth coating just the retaining ring support press in the metal in the medial border of double-layered cloth coating, make it is right to press from both sides the cloth coating provide the support of retaining ring in outer retaining ring of metal and the metal. The compression resistance of the slip sealing structure can be improved through the metal outer retaining ring and the metal inner retaining ring, and rubber extrusion is avoided at high temperature and high pressure; the pressure resistance and the gas explosion resistance of the slip sealing structure are enhanced through the cloth clamping coating layer, and meanwhile, the sealing body also provides a skeleton effect when the rubber is softened at high temperature, so that the deformation of the rubber material at high and low temperatures is reduced, and the high and low temperature resistance of the slip sealing structure is improved.
Description
Technical Field
The utility model relates to a seal part technical field especially relates to a slips seal structure.
Background
In the process of drilling operation and oil gas test, the casing head slip hanger belongs to the basic part of a wellhead device and is arranged at the upper end of a casing string to hang various layers of casing strings and seal annular spaces among various layers of casings. The slip sealing element is used as a main sealing element of the slip type casing head, and the performance of the slip sealing element directly influences the application range and normal use of the casing head.
Most of slip sealing members used at present adopt an annular rubber ring structure, are basically used under the working conditions that the pressure is 5000PSI and the temperature range is-18-110 ℃, and cannot meet the requirements that a slip type casing head is used under higher pressure and wider temperature range, and the reason is as follows: 1. the service temperature range of the rubber is relatively narrow, and the physical properties of the rubber are greatly reduced in the environment with the temperature generally exceeding the temperature range of-18-110 ℃; 2. the rubber is easy to have the phenomenon of air explosion when the pressure is released at high pressure, so that the rubber product is damaged; 3. the rubber can be softened under the high-temperature state, and the slip sealing element is easy to be extruded out of the gap under the action of high pressure to deform; 4. rubber hardens at low temperatures and loses elasticity, so that its sealing performance is reduced.
The factors determine that the rubber slip sealing element used at present cannot meet the use requirements of the slip type casing head under the working conditions of 15000PSI high pressure and PU temperature grade (-29-121 ℃).
SUMMERY OF THE UTILITY MODEL
In order to overcome the deficiencies in the prior art, the utility model provides a slip seal structure can satisfy the use of slip formula casing head under 15000PSI high pressure, PU temperature grade (-29 ℃ -121 ℃) operating mode.
In order to solve the technical problem, the utility model provides a slip seal structure, sealing body including the tube-shape, sealing body includes up end and terminal surface down the outside of the at least arbitrary terminal surface of sealing body is equipped with the outer retaining ring of metal and is equipped with the inner retainer ring of metal in the inboard of this terminal surface, is setting be equipped with on the terminal surface of the outer retaining ring of metal and the inner retainer ring of metal and press from both sides the cloth coating, the outer retaining ring of metal support press against in the outer fringe of clamp cloth coating just the retaining ring support press against in the metal in the medial border of clamp cloth coating, make it is right to press from both sides the cloth coating provide the support of retaining ring in outer retaining ring of metal and the metal.
Preferably, the outer edge and the inner edge of the cloth clamping coating layer are respectively provided with a step position, and the metal outer retainer ring and the metal inner retainer ring are respectively arranged on the step positions, so that the free end surfaces of the metal outer retainer ring and the metal inner retainer ring are flush with the upper end surface or the lower end surface of the seal body.
Preferably, the outer edge and the inner edge of the cloth clamping coating layer are respectively arranged between the outer side wall and the inner side wall of the sealing body.
Preferably, the outer side of the upper end face or the lower end face of the seal body is provided with a first metal outer retainer ring, the inner side of the end face is provided with a first metal inner retainer ring, and the end faces provided with the first metal outer retainer ring and the first metal inner retainer ring are provided with first cloth clamping coating layers.
As a preferable scheme, a first metal outer check ring is arranged on the outer side of the upper end face of the seal body, a first metal inner check ring is arranged on the inner side of the upper end face, and a first cloth clamping coating layer is arranged on the end face provided with the first metal outer check ring and the first metal inner check ring; the outer side of the lower end face of the sealing body is provided with a second metal outer check ring, the inner side of the lower end face is provided with a second metal inner check ring, and a second cloth clamping coating layer is arranged on the end faces of the second metal outer check ring and the second metal inner check ring.
Preferably, a plurality of annular cloth clamping reinforcing layers are arranged in the sealing body, and the plurality of cloth clamping reinforcing layers are stacked in the thickness direction of the sealing body by the same or different gaps.
Preferably, each of the cloth clamping reinforcing layers is coaxial with the sealing body.
Preferably, the sealing body forms a complete enclosure for the cloth-sandwiched reinforcing layer.
Preferably, the sealing body is made of rubber materials, and the sealing body is connected with the cloth clamping coating layer and the cloth clamping reinforcing layer in a vulcanization mode.
Preferably, the outer side wall and/or the inner side wall of the sealing body are/is provided with assembling surface lines, and the assembling surface lines are wavy along the thickness direction of the sealing body.
The embodiment of the utility model provides a, compare with prior art, its beneficial effect is: the end face of the sealing body is designed into a structure combined with the metal outer retainer ring and the metal inner retainer ring, and the metal retainer ring has following performance, so that after the sealing body is pressed by the gland, rubber of the sealing body deforms to push the metal retainer ring and can push the metal retainer ring to the direction of the groove gap, the assembly gap can be reduced to be close to zero, the compression resistance of the slip sealing structure is improved, and rubber extrusion at high temperature and high pressure is avoided; the end face of the sealing body is provided with the cloth clamping coating layer, so that the density of the upper end face and the lower end face of the sealing body is improved, the releasing speed of gas in the sealing body is reduced, the compression resistance and the gas explosion resistance of the slip sealing structure are enhanced, meanwhile, the cloth clamping coating layer also provides a skeleton effect for the sealing body when rubber is softened at a high temperature, the deformation of a rubber material at a high temperature and a low temperature is reduced, and the high and low temperature resistance of the slip sealing structure is improved; the utility model discloses a slips seal structure can satisfy the user demand of slip formula casing head under 15000PSI high pressure, PU temperature grade (-29 ℃ -121 ℃) operating mode.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required for the embodiments will be briefly described below, and obviously, the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a top view of a slip seal arrangement according to an embodiment of the present invention;
fig. 2 is a partial schematic view of section a-a in fig. 1.
In the figure: 1-a sealing body, 2-a metal outer retainer ring, 21-a first metal outer retainer ring, 22-a second metal outer retainer ring, 3-a metal inner retainer ring, 31-a first metal inner retainer ring, 32-a second metal inner retainer ring, 4-a cloth clamping coating layer, 41-a first cloth clamping coating layer, 42-a second cloth clamping coating layer, 5-a step position, 6-a cloth clamping reinforcing layer, 7-an assembly surface texture, 71-an outer assembly surface texture, 72-an inner assembly surface texture and 8-an assembly hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 and 2, a preferred embodiment of the present invention provides a slip seal structure, which includes a cylindrical seal body 1, the seal body includes an upper end surface and a lower end surface, an outer metal retainer ring 2 is disposed on the outer side of at least any one end surface of the seal body 1, an inner metal retainer ring 3 is disposed on the inner side of the end surface, a cloth clamping covering layer 4 is disposed on the end surface where the outer metal retainer ring 2 and the inner metal retainer ring 3 are disposed, the outer metal retainer ring 2 is pressed against the outer edge of the cloth clamping covering layer 4, and the inner metal retainer ring 3 is pressed against the inner edge of the cloth clamping covering layer 4, so that the cloth clamping covering layer 4 provides support for the outer metal retainer ring 2 and the inner metal retainer ring 3.
Based on the slip sealing structure with the technical characteristics, the end face of the sealing body 1 is designed into a structure combined with the metal outer retainer ring 2 and the metal inner retainer ring 3, and the metal retainer ring has following performance, so that after the sealing body 1 is pressed by a gland, rubber of the sealing body 1 deforms to push the metal retainer ring, and the metal retainer ring can be pushed to the direction of the gap of the groove, so that the assembly gap can be reduced to be close to zero, the compression resistance of the slip sealing structure is improved, and rubber extrusion in high temperature and high pressure is avoided; the end face of the sealing body 1 is provided with the cloth clamping coating layer 4, so that the density of the upper end face and the lower end face of the sealing body 1 is improved, the releasing speed of gas in the sealing body 1 is reduced, the compression resistance and the gas explosion resistance of the slip sealing structure are enhanced, meanwhile, the cloth clamping coating layer 4 also provides a skeleton effect for the sealing body 1 when rubber is softened at a high temperature, the deformation of a rubber material at a high temperature and a low temperature is reduced, and the high and low temperature resistance of the slip sealing structure is improved; the utility model discloses a slips seal structure can satisfy the user demand of slip formula casing head under 15000PSI high pressure, PU temperature grade (-29 ℃ -121 ℃) operating mode.
Preferably, the outer metal retainer ring 2 is made of stainless steel wire and is mounted on the outer ring of the sealing main body 1, and the outer metal retainer ring has the functions of reducing the gap of the groove and enhancing the pressure resistance of the slip sealing structure. The inner metal retainer ring 3 is made of stainless steel wire materials and is arranged on the inner ring of the sealing main body 1, and the inner metal retainer ring has the functions of reducing the gap of the groove and enhancing the compression resistance of the slip sealing structure.
Further, the sealing body 1 is made of a rubber material, and the sealing body 1 is made of a hydrogenated nitrile rubber material, and the function of the hydrogenated nitrile rubber material is to provide elasticity and sealing function. The cloth clamping coating layer 4 is made of reinforced cloth clamping materials, and the sealing body 1 is connected with the cloth clamping coating layer 4 in a vulcanization mode. The cloth clamping coating layer 4 is vulcanized and connected to the upper end face and the lower end face of the sealing main body 1, and has the functions of protecting the sealing main body 1 and enhancing the compression resistance, the gas explosion resistance and the high and low temperature resistance of the slip sealing structure.
The outer side edge and the inner side edge of the cloth clamping coating layer 4 are respectively provided with a step position 5, and the metal outer retainer ring 2 and the metal inner retainer ring 3 are respectively arranged on the step positions 5, so that the free end surfaces of the metal outer retainer ring 2 and the metal inner retainer ring 3 are flush with the upper end surface or the lower end surface of the sealing body 1. The step position 5 is used as a part of the cloth clamping coating layer 4, so that the metal outer retainer ring 2 and the metal inner retainer ring 3 are flush with the upper end surface and the lower end surface of the sealing body 1 on the one hand, and on the other hand, the cloth clamping coating layer 4 can provide strong support for the first metal outer retainer ring 21 and the first metal inner retainer ring 31, and the coating rate of the cloth clamping coating layer 4 to the sealing body 1 can be improved.
The outer side edge and the inner side edge of the cloth clamping coating layer 4 are respectively arranged between the outer side wall and the inner side wall of the sealing body 1, so that gas is reduced in the leakage inside the sealing body 1, and the air tightness of the slip sealing structure is improved.
In an embodiment of the present invention, the outer side of the upper end surface of the sealing body 1 is provided with a first metal outer retainer ring 21, the inner side of the upper end surface is provided with a first metal inner retainer ring 31, and the upper end surface is provided with a first cloth clamping covering layer 41. Alternatively, a first metal outer retainer ring 21 is provided on the outer side of the lower end surface of the seal body 1, a first metal inner retainer ring 31 is provided on the inner side of the lower end surface, and a first cloth sandwiching coating layer 41 is provided on the lower end surface.
As shown in fig. 2, in another embodiment of the present invention, a first metal outer retainer ring 21 is disposed on the outer side of the upper end surface of the sealing body 1, a first metal inner retainer ring 31 is disposed on the inner side of the upper end surface, and a first cloth clamping covering layer 41 is disposed on the end surface provided with the first metal outer retainer ring 21 and the first metal inner retainer ring 31; the outer side of the lower end face of the sealing body 1 is provided with a second metal outer retainer ring 22, the inner side of the lower end face is provided with a second metal inner retainer ring 32, and the end faces of the second metal outer retainer ring 22 and the second metal inner retainer ring 32 are provided with a second cloth clamping coating layer 42. The upper end face and the lower end face of the sealing body 1 are designed into structures combined with the metal outer retainer ring 2 and the metal inner retainer ring 3, so that the compression resistance of the slip sealing structure is greatly improved, and rubber extrusion is avoided when high temperature and high pressure are generated.
The sealing body 1 is internally provided with a plurality of annular cloth clamping reinforcing layers 6, and the cloth clamping reinforcing layers 6 are arranged in a stacking manner in the thickness direction of the sealing body 1 at the same or different gaps. The cloth clamping enhancement layer 6 is made of a reinforced cloth clamping material, the cloth clamping enhancement layer 6 and the main rubber ring 5 are connected together in a vulcanization mode, the cloth clamping enhancement layer is arranged inside the sealing body 1, and the cloth clamping enhancement layer and the main rubber ring have the functions of enhancing the compression resistance, the gas explosion resistance and the high and low temperature resistance of the slip sealing structure.
Further, be equipped with a plurality of pilot hole 8 that is the annular array and distribute on the slips seal structure, a plurality of pilot hole follows respectively sealed main part 1's thickness direction runs through the slips seal structure, promptly pilot hole 8 runs through in proper order first press from both sides cloth coating 41, sealed main part 1's up end, press from both sides cloth enhancement layer 6, sealed main part 1's lower terminal surface, second press from both sides cloth coating 42.
The slip sealing structure of the embodiment is provided with a plurality of layers of cloth clamping reinforcing layers 6, while the prior art is that no internal cloth clamping layer is arranged inside a sealing element. Because the inside of the sealing main body 1 is provided with the cloth clamping enhancement layer 6, the structure of the sealing main body 1 is stable, the penetration force of pressure gas is gradually reduced by the cloth clamping layers in the sealing main body, and the releasing speed of the gas in the sealing element is also reduced, so that the compression resistance and the gas explosion resistance of the slip sealing structure are enhanced. The cloth clamping enhancement layer 6 also provides a skeleton effect for the sealing main body 1 when the rubber material is softened at a high temperature, reduces the deformation of the rubber material at a high temperature and a low temperature, and improves the high and low temperature resistance of the slip sealing structure.
In this embodiment, each cloth clamping reinforcing layer 6 is coaxial with the sealing body 1, so as to ensure the structural stability of the slip sealing structure.
The sealing body 1 is used for fully surrounding the cloth clamping reinforcing layer 6, so that the leakage of gas in the sealing body 1 is reduced, and the air tightness of the slip sealing structure is improved.
The outer side wall and/or the inner side wall of the sealing body 1 are/is provided with assembling surface grains 7, and the assembling surface grains 7 are wavy along the thickness direction of the sealing body 1. The assembling surface patterns 7 comprise an outer assembling surface pattern 71 arranged on the outer side wall of the sealing main body 1 and an inner assembling surface pattern 72 arranged on the inner side wall of the sealing main body 1, and the outer assembling surface pattern 71 and the inner assembling surface pattern 72 are used as a part of the sealing main body 1 and are used for improving the sealing performance of the slip sealing structure. The side surface of the sealing element in the prior art is generally in a smooth circular arc shape, is not provided with a wavy assembly surface line, belongs to surface sealing, has dispersed sealing force, and has poor sealing performance particularly at high and low temperatures. The sealing main body 1 of the embodiment is provided with the wavy assembly surface lines on the inner side wall and the outer side wall, so that a linear sealing effect is formed, the sealing force is concentrated, and the sealing performance of the slip sealing structure is improved.
The utility model discloses a slips seal structure has apparent advantage for prior art: 1. the compression resistance is good, and the use pressure can be up to 15000 PSI; 2. the application temperature range is wide, and the applicable temperature range can reach PU (-29-121 ℃); 3. the anti-gas explosion capability is strong, and under the working conditions of 15000PSI and PU (-29-121 ℃), the gas explosion damage phenomenon does not occur after the use, and no damage is caused; 4. and (4) passing a PU temperature grade test of the casing head and obtaining certification. Therefore, the utility model discloses a slips seal structure has very superior application prospect.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides a slip seal structure, its characterized in that, includes the sealed body of tube-shape, sealed body includes up end and lower terminal surface the outside of the arbitrary terminal surface at least of sealed body is equipped with the outer retaining ring of metal and is equipped with the inner retainer ring of metal in the inboard of this terminal surface, is setting be equipped with the double-layered cloth coating on the terminal surface of the outer retaining ring of metal and the inner retainer ring of metal, the outer retaining ring of metal support press in the outer flange of double-layered cloth coating just the retaining ring support press in the metal in the inner flange of double-layered cloth coating, make the double-layered cloth coating provide right the support of the outer retaining ring of metal and the inner retainer ring of metal.
2. The slip seal structure of claim 1, wherein the outer and inner edges of the coated sandwich layer are respectively provided with a step, and the outer and inner metal retainers are respectively mounted on the step, so that the free end surfaces of the outer and inner metal retainers are flush with the upper or lower end surface of the seal body.
3. The slip seal configuration of claim 2, wherein the outer and inner edges of the clothed coating are interposed between the outer and inner sidewalls of the seal body, respectively.
4. The slip seal structure according to claim 3, wherein a first metal outer retainer ring is provided on an outer side of the upper end surface or the lower end surface of the seal body, a first metal inner retainer ring is provided on an inner side of the end surface, and a first cloth sandwiching coating layer is provided on an end surface on which the first metal outer retainer ring and the first metal inner retainer ring are provided.
5. The slip sealing structure according to claim 3, wherein a first metal outer retainer ring is arranged on an outer side of an upper end face of the sealing body and a first metal inner retainer ring is arranged on an inner side of the upper end face, and a first cloth clamping coating layer is arranged on an end face provided with the first metal outer retainer ring and the first metal inner retainer ring; the outer side of the lower end face of the sealing body is provided with a second metal outer check ring, the inner side of the lower end face is provided with a second metal inner check ring, and a second cloth clamping coating layer is arranged on the end faces of the second metal outer check ring and the second metal inner check ring.
6. The slip seal structure of claim 1, wherein a plurality of annular cloth clamping reinforcing layers are arranged inside the seal body, and the cloth clamping reinforcing layers are stacked in the thickness direction of the seal body with the same or different gaps.
7. The slip seal structure of claim 6, wherein each of the scrim reinforcement layers is coaxial with the seal body.
8. The slip seal configuration of claim 7, wherein the seal body constitutes a full enclosure of the scrim reinforcement layer.
9. The slip seal structure of claim 6, wherein the seal body is formed of a rubber material, and the seal body is bonded to the coated layer and the reinforced layer by vulcanization.
10. The slip seal structure of any one of claims 1-9, wherein the outer sidewall and/or the inner sidewall of the seal body is provided with an assembly surface pattern, the assembly surface pattern being undulated along a thickness direction of the seal body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920809829.4U CN210087283U (en) | 2019-05-30 | 2019-05-30 | Slip sealing structure |
| US16/457,931 US11112039B2 (en) | 2019-05-30 | 2019-06-29 | Slip sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920809829.4U CN210087283U (en) | 2019-05-30 | 2019-05-30 | Slip sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210087283U true CN210087283U (en) | 2020-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920809829.4U Active CN210087283U (en) | 2019-05-30 | 2019-05-30 | Slip sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210087283U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107247A (en) * | 2019-05-30 | 2019-08-09 | 广州加士特密封技术有限公司 | A kind of slip seals structure |
-
2019
- 2019-05-30 CN CN201920809829.4U patent/CN210087283U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107247A (en) * | 2019-05-30 | 2019-08-09 | 广州加士特密封技术有限公司 | A kind of slip seals structure |
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| CP02 | Change in the address of a patent holder |
Address after: No. 1 Xinyu North Road, Ningxi Street, Zengcheng District, Guangzhou City, Guangdong Province, 510000 Patentee after: GUANGZHOU JST SEALS TECHNOLOGY Co.,Ltd. Address before: 510530 block B, 718 Kaichuang Avenue, Guangzhou hi tech Industrial Development Zone, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU JST SEALS TECHNOLOGY Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |