CN204436308U - High pressure self-seal well sealing - Google Patents
High pressure self-seal well sealing Download PDFInfo
- Publication number
- CN204436308U CN204436308U CN201420812705.9U CN201420812705U CN204436308U CN 204436308 U CN204436308 U CN 204436308U CN 201420812705 U CN201420812705 U CN 201420812705U CN 204436308 U CN204436308 U CN 204436308U
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- expansion block
- rubber core
- retainer ring
- self
- press cover
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Abstract
The utility model relates to oilfield drilling and production technology field, particularly relate to a kind of high pressure self-seal well sealing, comprise expansion block retainer ring, upper press cover, expansion block, rubber core and body, described expansion block upper buckle is combined in the bottom of described expansion block retainer ring, described expansion block retainer ring is threaded with described upper press cover, fit in the taper position of described expansion block and described rubber core, the top of described rubber core and described upper press cover, expansion block retainer ring and body are fixed together.When oil pipe is deep into oil well, first contact with this expansion block, this makes it possible to prevent oil pipe direct friction rubber core, the pressure that oil gas in well produces can around rubber core upwards, owing to there is expansion block, pressure can send expansion block to by rubber core, is that expansion block tightens up oil pipe more closely, and there will not be the phenomenon that rubber core ruptures, thus improve the application life of self-sealing device.
Description
Technical field
The utility model relates to oilfield drilling and production technology field, particularly relates to a kind of high pressure self-seal well sealing.
Background technology
Self-sealing blowout preventer is used for closing rountrip tubing string and closes oil jacket annular space.Well head is self-styled is requisite wellhead assembly in oilfield downhole operation construction; according to well control job requirements; self-sealing blowout preventer must be installed on preventer top during operation; simultaneously when rountrip is constructed in order to prevent trouble of lost tool in hole; protect well head, realize cleaner production, also need that well head is installed on preventer top self-styled.Chinese patent discloses a kind of oil well sealer, the patent No.: 200520113383X, and the self-sealing rubber core of self-sealing device is arranged in lower body, and self-sealing rubber core arranges platen, and lower body and upper body are threaded, and self-sealing rubber core is wineglass dress, is polytetrafluoroethylene (PTFE) material.This kind of structure has following shortcoming, and owing to adopting the self-sealing rubber core of polytetrafluoroethylene (PTFE) material, comparatively stronger than its rigidity with rubber phase, elasticity is poor.Because its rigidity is stronger: when tubing coupling is when by self-sealing rubber core, a sizable descending power must be applied, because its elasticity is poor: tubing coupling is by after self-sealing rubber core, and can not at once bounce back to be formed with oil pipe seals, and causes self-sealing device leakage and loses sealing function.
Now conventional self-sealing device, due to its anti-pressure ability, glue core cracky reason, loses envelope phenomenon in case of stratum jumps easily to cause in construction way.Hidden danger is brought to safe construction.
Utility model content
The purpose of this utility model is the deficiency overcoming above-mentioned technology, and provides a kind of high pressure self-seal well sealing, high life, prevents oil gas from upwards cutting off self-sealing rubber core.
The utility model for achieving the above object, by the following technical solutions: a kind of high pressure self-seal well sealing, it is characterized in that: comprise expansion block retainer ring, upper press cover, expansion block, rubber core and body, described expansion block upper buckle is combined in the bottom of described expansion block retainer ring, described expansion block retainer ring is threaded with described upper press cover, fit in the taper position of described expansion block and described rubber core, the top of described rubber core and described upper press cover, expansion block retainer ring and body are fixed together relative to prior art, the utility model adds an expansion block of fitting with rubber core in the position of the taper mouth of traditional rubber core, this expansion block adopts hard material, when tubing coupling is deep into oil well, first contact with this expansion block, this makes it possible to prevent oil pipe direct friction rubber core, the pressure that oil gas in well produces can around rubber core upwards, owing to there is expansion block, pressure can send expansion block to by rubber core, expansion block is made to tighten up oil pipe more closely, the support ring of a rigidity is defined between rubber core and oil pipe, and there will not be the phenomenon that rubber core ruptures, thus improve the application life of self-sealing device and resist the ability of high pressure.
Preferably, cushion space is provided with between described rubber core and described body.By this cushion space, when oil pipe is descending, expansion block extruding rubber core moves to this cushion space, makes rubber core have individual displacement space.
Preferably, described body is provided with flange hole.For being connected with extraneous pipeline.
The beneficial effects of the utility model are: relative to prior art, the utility model adds an expansion block of fitting with rubber core in the position of the taper mouth of traditional rubber core, this expansion block adopts hard material, when oil pipe is deep into oil well, first contact with this expansion block, this makes it possible to prevent oil pipe direct friction rubber core, the pressure that oil gas in well produces can around rubber core upwards, owing to there is expansion block, pressure can send expansion block to by rubber core, that expansion block tightens up oil pipe more closely, and there will not be the phenomenon that rubber core ruptures, thus improve the application life of self-sealing device.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the schematic diagram of the structure of prior art;
In figure: 1, expand block retainer ring; 2, upper press cover; 3, block is expanded; 4, rubber core; 5, body; 6, cushion space.
Detailed description of the invention
Detailed description of the invention of the present utility model is described in detail below in conjunction with accompanying drawing and preferred embodiment.As shown in Figure 1 to Figure 2, a kind of high pressure self-seal well sealing, comprise expansion block retainer ring 1, upper press cover 2, expansion block 3, rubber core 4 and body 5, described expansion block upper buckle is combined in the bottom of described expansion block retainer ring, described expansion block retainer ring is threaded with described upper press cover, fit in the taper position of described expansion block and described rubber core, the top of described rubber core and described upper press cover, expansion block retainer ring and body are fixed together.Relative to prior art, the utility model adds an expansion block of fitting with rubber core in the position of the taper mouth of traditional rubber core, this expansion block adopts hard material, when oil pipe is deep into oil well, first contact with this expansion block, this makes it possible to prevent oil pipe direct friction rubber core, the pressure that oil gas in well produces can around rubber core upwards, owing to there is expansion block, pressure can send expansion block to by rubber core, that expansion block tightens up oil pipe more closely, and there will not be the phenomenon that rubber core ruptures, thus improve the application life of self-sealing device.Cushion space 6 is provided with between described rubber core and described body.By this cushion space, when oil pipe is descending, expansion block extruding rubber core moves to this cushion space, makes rubber core have individual displacement space.Described body is provided with flange hole.For being connected with extraneous pipeline.
Relative to prior art, the utility model adds an expansion block of fitting with rubber core in the position of the taper mouth of traditional rubber core, this expansion block adopts hard material, when oil pipe is deep into oil well, first contact with this expansion block, this makes it possible to prevent oil pipe direct friction rubber core, the pressure that oil gas in well produces can around rubber core upwards, owing to there is expansion block, pressure can send expansion block to by rubber core, that expansion block tightens up oil pipe more closely, and there will not be the phenomenon that rubber core ruptures, thus improve the application life of self-sealing device.
The above is only preferred embodiment of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
1. a high pressure self-seal well sealing, it is characterized in that: comprise expansion block retainer ring, upper press cover, expansion block, rubber core and body, described expansion block upper buckle is combined in the bottom of described expansion block retainer ring, described expansion block retainer ring is threaded with described upper press cover, fit in the taper position of described expansion block and described rubber core, the top of described rubber core and described upper press cover, expansion block retainer ring and body are fixed together.
2. high pressure self-seal well sealing according to claim 1, is characterized in that: be provided with cushion space between described rubber core and described body.
3. high pressure self-seal well sealing according to claim 1, is characterized in that: described body is provided with flange hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420812705.9U CN204436308U (en) | 2014-12-18 | 2014-12-18 | High pressure self-seal well sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420812705.9U CN204436308U (en) | 2014-12-18 | 2014-12-18 | High pressure self-seal well sealing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204436308U true CN204436308U (en) | 2015-07-01 |
Family
ID=53604186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420812705.9U Active CN204436308U (en) | 2014-12-18 | 2014-12-18 | High pressure self-seal well sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204436308U (en) |
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2014
- 2014-12-18 CN CN201420812705.9U patent/CN204436308U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |