CN205189810U - Wellhead sealing device - Google Patents
Wellhead sealing device Download PDFInfo
- Publication number
- CN205189810U CN205189810U CN201521032750.3U CN201521032750U CN205189810U CN 205189810 U CN205189810 U CN 205189810U CN 201521032750 U CN201521032750 U CN 201521032750U CN 205189810 U CN205189810 U CN 205189810U
- Authority
- CN
- China
- Prior art keywords
- piston
- sit
- oil jacket
- ground
- passage
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a wellhead sealing device, include and connect tubing nipple, body and sub -unit connection tubing nipple from last upper portion to connecting gradually down, the cover is equipped with spacing sleeve on the body, the cover is equipped with a rubber seal section of thick bamboo on spacing sleeve, all is equipped with the sealed ring that keeps off at the upper and lower both ends of a rubber seal section of thick bamboo, being equipped with to sit in the sealed top that keeps off the ring and sealing a piston, sit and seal the piston suit on the body, seal a chamber sitting to seal to be formed with to sit between piston and the body, sit and seal that the passageway is suppressed with ground in the chamber and lower part oil jacket annulus pressure passageway feeds through respectively, the upper end of suppressing the passageway on ground is connected with the upper portion check valve, is connected with the lower part check valve at the lower extreme of lower part oil jacket annulus pressure passageway, being equipped with circulation canal in the lateral wall of body, being connected with the bleed valve in circulation canal's upper end, the bleed valve is parallelly connected with the upper portion check valve. The utility model discloses can keep apart the oil jacket annular space, protection oil gas well head, can open when needing and wash the kill -job passageway, sit and can not cause mechanical damage to the sleeve pipe when sealing.
Description
Technical field
The utility model relates to a kind of downhole tool for oil gas field, particularly a kind of well mouth sealing device, for flowing well protection wellhead tree tree, prevents sleeve tube pressure.
Background technology
In the production of flowing well, because various problem appears in flow string, cause oil jacket annular space with pressure, directly threaten the safety of well head, and no longer meet country to the safety requirements in marine petroleum exploitation.Marine petroleum exploitation safety requirements: have the Oil/gas Well from the ability of overflowing, from stratum to ground, twice safety curtain can not be less than.
Present existing well mouth sealing device mainly adopts packer, and common packer does not have circulation canal, and what cannot meet Oil/gas Well washes kill-job demand, so can not use.Current cable-passing packer can realize protection annular space and have and wash kill-job passage, but needs to suppress from oil pipe inside with slush pump to set, and this just needs a series of less important work operation, operates very loaded down with trivial details.After cable-passing packer sets, needed to carry suitable tonnage during deblocking and carried out deblocking, be subject to the restriction of lifting machinery specified tonnage; And existing cable-passing packer has slip mechanism, when slips sets, mechanical damage can be caused to sleeve pipe, high-pressure oil-gas well is especially needed to consider.
Summary of the invention
The utility model provides a kind of well mouth sealing device for solving in known technology the technical problem that exists, and this device can isolate oil jacket annular space, protection oil and gas wellhead; And when needing, can open and wash kill-job passage; And mechanical damage can not be caused to sleeve pipe when setting.
The technical scheme that the utility model is taked for the technical problem existed in solution known technology is: a kind of well mouth sealing device, comprises the top connected pipes pipe nipple, body and the bottom connected pipes pipe nipple that connect successively from top to bottom, be set with spacing collar on the body, described spacing collar is connected with described body by deblocking pin, described spacing collar is set with multiple rubber seal cylinder, is equipped with seal stopper ring at the two ends up and down of each described rubber seal cylinder, set piston being positioned to be provided with above the described seal stopper ring of the top, the described piston bush that sets fills on the body, the two is formed and is slidably connected, described set to be formed between piston and described body set chamber, the described chamber that sets is suppressed passage with ground and is communicated with respectively with bottom oil jacket annular pressure passage, passage is suppressed on described ground and described bottom oil jacket annular pressure passage is all arranged in the sidewall of described body, the upper end suppressing passage on described ground is connected with upper one-way valve, bottom one way valve is connected with in the lower end of described bottom oil jacket annular pressure passage, in the sidewall of described body, be also provided with circulation canal, be connected with vent valve in the upper end of described circulation canal, described vent valve is in parallel with described upper one-way valve, and described vent valve and described upper one-way valve are connected with a tee junction.
The advantage that the utility model has and good effect are: be provided with circulation canal, and what can meet Oil/gas Well washes kill-job demand; Suppress realization from ground liquid controling pipe line to set, simple to operate; Cut off deblocking pin by upper lifting pipe post and realize deblocking, deblocking is laborsaving; Adopt rubber seal cylinder to realize setting, damage can not be caused to internal surface of sleeve pipe.The cavity of resorption making to set chamber suppresses passage and bottom oil jacket annular pressure channel connection with ground simultaneously, and realizing after ground controls to set, in this tool lower portion oil jacket, pressure enables instrument itself realize self-sealing function, makes setting of rubber seal cylinder reliable and stable.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is one of the utility model generalized section before setting;
Fig. 3 is the generalized section two of the utility model before setting;
Fig. 4 is the generalized section of the utility model after setting.
In figure: 1, top connected pipes pipe nipple, 2, vent valve, 3, body, 4, circulation canal, 5, set piston, 6, seal stopper ring, 7, bottom oil jacket annular pressure passage, 8, bottom one way valve, 9, bottom connected pipes pipe nipple, 10, spacing collar, 11, rubber seal cylinder, 12, deblocking pin, 13, chamber is set, 14, ground suppresses passage, 15, upper one-way valve, 16, production casing, 17, tee junction.
Detailed description of the invention
For summary of the invention of the present utility model, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1 ~ Fig. 4, a kind of annular space protective device, comprise the top connected pipes pipe nipple 1, body 3 and the bottom connected pipes pipe nipple 9 that connect successively from top to bottom.
Described body 3 is set with spacing collar 10, and described spacing collar 10 is connected with described body 3 by deblocking pin 12.
Described spacing collar 10 is set with multiple rubber seal cylinder 11, is equipped with seal stopper ring 6 at the two ends up and down of each described rubber seal cylinder 11.
Set piston 5 being positioned to be provided with above the described seal stopper ring 6 of the top, the described piston 5 that sets is sleeved on described body 3, the two is formed and is slidably connected, described set to be formed between piston 5 and described body 3 set chamber 13, the described chamber 13 that sets is suppressed passage 14 with ground and is communicated with respectively with bottom oil jacket annular pressure passage 7, passage 14 is suppressed on described ground and described bottom oil jacket annular pressure passage 7 is all arranged in the sidewall of described body 3, the upper end suppressing passage 14 on described ground is connected with upper one-way valve 15, bottom one way valve 8 is connected with in the lower end of described bottom oil jacket annular pressure passage 7.
Circulation canal 4 is also provided with in the sidewall of described body 3, vent valve 2 is connected with in the upper end of described circulation canal 4, described vent valve 2 is in parallel with described upper one-way valve 15, and described vent valve 2 and described upper one-way valve 15 are connected with a tee junction 17.
During application, above-mentioned well mouth sealing device is directly installed on tubing hanger bottom, adopt ground hydraulic pipeline to suppress earthward in passage 14 to suppress, hydraulic pressure enters and sets chamber 13, promotion sets piston 5 and moves down, and sets piston 5 extruding rubber seal downwards cylinder 11, makes rubber seal cylinder 11 produce expanded radially distortion, be pressed on the inwall of production casing 16, realize setting.After above-mentioned well mouth sealing device sets, bleed off the pressure of liquid controling pipe line, realize the isolation to oil jacket annular space, thus protection well head.After setting, when the pressure in production casing 16 be greater than set pressure time, the pressure in production casing 16 can be entered by bottom one way valve 8 and set chamber 13, is equivalent to carry out persistent pressure to setting chamber 13, realize self-sealing function, make setting of rubber seal cylinder 11 reliable and stable.
When Oil/gas Well is normally produced, above-mentioned well mouth sealing device need not set.When only there is phenomenon with pressure in Oil/gas Well sleeve pipe, just need to suppress realization by ground and set.
When Oil/gas Well needs dynamic tubing string operation, again suppress in liquid controling pipe line, open vent valve 2, make circulation canal 4 conducting, thus provide one to wash kill-job passage.
Upper lifting pipe post, makes deblocking pin 12 be cut off, releasing sealed baffle ring 6, and rubber seal cylinder 11 radial contraction, realizes deblocking.
Although be described preferred embodiment of the present utility model by reference to the accompanying drawings above; but the utility model is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that the utility model aim and claim protect, can also make a lot of form, these all belong within protection domain of the present utility model.
Claims (1)
1. a well mouth sealing device, is characterized in that, comprises the top connected pipes pipe nipple, body and the bottom connected pipes pipe nipple that connect successively from top to bottom;
Be set with spacing collar on the body, described spacing collar is connected with described body by deblocking pin;
Described spacing collar is set with multiple rubber seal cylinder, is equipped with seal stopper ring at the two ends up and down of each described rubber seal cylinder;
Set piston being positioned to be provided with above the described seal stopper ring of the top, the described piston bush that sets fills on the body, the two is formed and is slidably connected, described set to be formed between piston and described body set chamber, the described chamber that sets is suppressed passage with ground and is communicated with respectively with bottom oil jacket annular pressure passage, passage is suppressed on described ground and described bottom oil jacket annular pressure passage is all arranged in the sidewall of described body, the upper end suppressing passage on described ground is connected with upper one-way valve, bottom one way valve is connected with in the lower end of described bottom oil jacket annular pressure passage,
In the sidewall of described body, be also provided with circulation canal, be connected with vent valve in the upper end of described circulation canal, described vent valve is in parallel with described upper one-way valve, and described vent valve and described upper one-way valve are connected with a tee junction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521032750.3U CN205189810U (en) | 2015-12-10 | 2015-12-10 | Wellhead sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521032750.3U CN205189810U (en) | 2015-12-10 | 2015-12-10 | Wellhead sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205189810U true CN205189810U (en) | 2016-04-27 |
Family
ID=55782810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521032750.3U Expired - Fee Related CN205189810U (en) | 2015-12-10 | 2015-12-10 | Wellhead sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205189810U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108086939A (en) * | 2017-12-11 | 2018-05-29 | 中国海洋石油集团有限公司 | Y-TOOL bypasses blanking plug |
| CN109653699A (en) * | 2019-01-29 | 2019-04-19 | 中国海洋石油集团有限公司 | It a kind of oil/gas well well head method for blocking and blocks and uses device |
-
2015
- 2015-12-10 CN CN201521032750.3U patent/CN205189810U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108086939A (en) * | 2017-12-11 | 2018-05-29 | 中国海洋石油集团有限公司 | Y-TOOL bypasses blanking plug |
| CN109653699A (en) * | 2019-01-29 | 2019-04-19 | 中国海洋石油集团有限公司 | It a kind of oil/gas well well head method for blocking and blocks and uses device |
| CN109653699B (en) * | 2019-01-29 | 2022-02-11 | 中国海洋石油集团有限公司 | Oil and gas well mouth plugging method and device for plugging |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205189810U (en) | Wellhead sealing device | |
| CN105114027A (en) | Flexible self-sealed anti-humeral-protrusion compression packer | |
| CN104213888B (en) | A kind of thick oil thermal extraction down-hole steam injection string | |
| CN104179477B (en) | Coiled tubing hangs electric motor drive oil pump system process pipe string | |
| CN205189819U (en) | Annular space protection device | |
| CN204984329U (en) | Built -in coiled tubing hanger | |
| CN107916910A (en) | Independent hydraulic control packer pressure valve | |
| CN204402451U (en) | A kind of hydraulic control single flow device for the protection of underground double-pipe annular space | |
| CN206158709U (en) | Support formula water injection string | |
| CN206280039U (en) | Long packing element type anti-creep inflatable packer | |
| CN203285385U (en) | Hydraulic control packer | |
| CN205000922U (en) | Built -in coiled tubing completion pipe string | |
| CN203756112U (en) | Well washing balance packer | |
| CN203335042U (en) | Electric submersible pump production tubular column with hydraulic control valve | |
| CN107939347B (en) | Single-flow oil drainage process pipe column | |
| CN105587286B (en) | Lost circulation prevention flushing packer | |
| CN202338290U (en) | Gas lifting and completion Integrated tubular column with dual packers | |
| CN204899838U (en) | Compound bridging plug of ball cage | |
| CN207315294U (en) | Washing well double leather cup packer | |
| CN204113210U (en) | A kind of full well section is without bridging plug Semi-cementing tool | |
| CN209277853U (en) | A kind of fluid power promotion flushing manhole tubing string | |
| CN204754861U (en) | Liquid accuse packer | |
| CN201778733U (en) | Hydraulic penetration device between subsea production tree and tubing hanger | |
| CN208203211U (en) | A kind of leakproof two-stage water injection packer | |
| CN105401908A (en) | Dual-electric pump cable penetrating packer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160427 Termination date: 20201210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |