CN104612619A - High-pressure self-sealing blowout preventor - Google Patents
High-pressure self-sealing blowout preventor Download PDFInfo
- Publication number
- CN104612619A CN104612619A CN201410797017.4A CN201410797017A CN104612619A CN 104612619 A CN104612619 A CN 104612619A CN 201410797017 A CN201410797017 A CN 201410797017A CN 104612619 A CN104612619 A CN 104612619A
- Authority
- CN
- China
- Prior art keywords
- expansion block
- rubber core
- self
- oil pipe
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 29
- 239000003129 oil well Substances 0.000 abstract description 7
- 238000005553 drilling Methods 0.000 abstract description 2
- 210000004907 gland Anatomy 0.000 abstract 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 208000032750 Device leakage Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003292 glue Substances 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
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)
- Gasket Seals (AREA)
Abstract
The invention relates to the technical field of oil field oil well drilling and production, in particular to a high-pressure self-sealing blowout preventor. The high-pressure self-sealing blowout preventor comprises an expansion block fixing ring, an upper gland, an expansion block, a rubber core and a body. The upper portion of the expansion block is buckled to the lower portion of the expansion block fixing ring, the expansion block fixing ring is in threaded connection with the upper gland, the expansion block is attached to the conical part of the rubber core, and the upper portion of the rubber core, the upper gland, the expansion block fixing ring and the body are fixed together. When an oil pipe deeply enters an oil well, the oil pipe firstly makes contact with the expansion block so that the oil pipe can be prevented from directly rubbing the rubber core, the pressure generated by oil gas in the well can be upward on the periphery of the rubber core, the pressure can be transmitted to the expansion block through the rubber core due to the existence of the expansion block, the oil pipe is more tightly tightened through the expansion block, the phenomenon of breakage of the rubber core can be avoided, and thus the service life of the self-sealing blowout preventor is prolonged.
Description
Technical field
The present invention relates to oilfield drilling and production technology field, particularly relate 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.
Summary of the invention
The object of the invention is to the deficiency overcoming above-mentioned technology, and provide a kind of high pressure self-seal well sealing, high life, prevent oil gas from upwards cutting off self-sealing rubber core.
The present invention 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 present invention 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 invention has the beneficial effects as follows: relative to prior art, the present invention 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 invention;
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
The specific embodiment of the present invention 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 present invention 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, be 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 present invention 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, be 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 the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
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 |
|---|---|---|---|
| CN201410797017.4A CN104612619A (en) | 2014-12-18 | 2014-12-18 | High-pressure self-sealing blowout preventor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410797017.4A CN104612619A (en) | 2014-12-18 | 2014-12-18 | High-pressure self-sealing blowout preventor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104612619A true CN104612619A (en) | 2015-05-13 |
Family
ID=53147244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410797017.4A Pending CN104612619A (en) | 2014-12-18 | 2014-12-18 | High-pressure self-sealing blowout preventor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104612619A (en) |
-
2014
- 2014-12-18 CN CN201410797017.4A patent/CN104612619A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207017968U (en) | Oil well head annular space sealing device | |
| CN107143298A (en) | Oil well head annular space sealing device | |
| CN104265234B (en) | Constant pressure stepped-depacking packer | |
| US7669654B2 (en) | Cup tool with three-part packoff for a high pressure mandrel | |
| CN102061901B (en) | Compensation type multi-purpose annular blowout preventer | |
| CN211448599U (en) | Slip type hanger and continuous pipe completion pipe string mounting structure | |
| CN102720471B (en) | Safety valve of pressure control water injection well | |
| CN104120993A (en) | Oil well polish rod sealer with sealing padding capable of being injected | |
| CN107269244A (en) | Ring packing assembly | |
| CN202596657U (en) | Expanding packer | |
| CN103452515A (en) | Wellhead bimetal seal assembly | |
| CN103850662B (en) | One is annular preventer under water | |
| CN205858247U (en) | Dry method well cementation well head annular space sealing device | |
| CN204436308U (en) | High pressure self-seal well sealing | |
| CN104612619A (en) | High-pressure self-sealing blowout preventor | |
| CN204532248U (en) | A kind of embedded gate valve type Dual tubing heat extraction wellhead | |
| CN205477497U (en) | Well head open type sealing ring seat circle | |
| CN203961878U (en) | A kind of airtight and watertight padding can pouring-in oil-well optical rod sealing apparatus | |
| US20060090904A1 (en) | Cup tool, cup tool cup and method of using the cup tool | |
| CN202360057U (en) | Leather cup packer | |
| CN105201443B (en) | A kind of blanking plug in oil pipe launched for steel wire | |
| CN203742534U (en) | Push-in type suspension packer | |
| CN209875103U (en) | Sealing device for oil pipe head of gas production well head | |
| CN206972228U (en) | Testing pressure of well head packer detecting device | |
| CN108979576B (en) | Permanent liner hanger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150513 |
|
| WD01 | Invention patent application deemed withdrawn after publication |