CN207161033U - Change well mouth sealing device - Google Patents
Change well mouth sealing device Download PDFInfo
- Publication number
- CN207161033U CN207161033U CN201721034301.1U CN201721034301U CN207161033U CN 207161033 U CN207161033 U CN 207161033U CN 201721034301 U CN201721034301 U CN 201721034301U CN 207161033 U CN207161033 U CN 207161033U
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- CN
- China
- Prior art keywords
- wall
- pipe
- sealing device
- well head
- assembly
- 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
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Abstract
The utility model discloses well mouth sealing device, including central tube, rotation pipe, slips assembly is changed, described, the slips assembly is arranged on center pipe outer wall, rotation pipe is additionally provided with outside the central tube, the rotation pipe is above slips assembly.The center pipe outer wall is additionally provided with leather cup assembly, and the leather cup assembly is located at below slips assembly.The slips assembly include taper sheath, block teeth, slip sleeve, the taper sheath is spacing in the land of center pipe outer wall, the block teeth by itself inner conical surface and taper sheath male cone (strobilus masculinus) it is in mating connection.The block teeth upper end connects slip sleeve, slip sleeve upper surface contact rotation ttom of pipe end.The central tube upper end is connected with box cupling.The utility model terminates from the initial well head that changes until changing well head, entirely changes well head construction and has accomplished well control essential safety, effectively avoids the well control hidden danger changed well head operation and brought under well head opening-wide state.
Description
Technical field
It the utility model is related to workover treatment and change shaft mouth operation constructing device, specifically change well mouth sealing device.
Background technology
At present, it is one of conventional construction process that underground workover operation construction, which changes well head process, such as：Old well changes well
Mouth, the rotating shaft of heavy oil wells steam injection change production wellhead, measure job execution changes big rank well head etc. and all be unable to do without replacing well head work
Industry is constructed；Particularly in viscous crude operation, because oil pipe instlated tubular is used alternatingly, different well heads need to be just changed, is changing well head mistake
Cheng Zhong, well head are in uncontrollable state, and borehole pressure is influenceed to change ups and downs by steam injection, occur well kick at any time or blowout is lost
Control, at present, it is to change well head continuously to construct that we, which grow the effective method of controlling taken, observes well head level change at any time, once
There is blowout omen to start emergency measure immediately, by force installing wellhead closing well, even above-mentioned way, however it remains very big well control
Risk, because pit shaft is to open wide runaway condition when changing well head.Therefore, we, which study to have made, changes well mouth sealing device, with
Ensure the generation of well kick and blowout out of control accident.
Through patent searching document, application number：201420702091.9 it is quick more that publication date 2015-03-25 discloses one kind
Rig tool is changed, including sealed outer pipe, slotting envelope inner tube, the slotting envelope inner tube include saving under section, inner tube box cupling, inner tube in inner tube,
Section is connected with section under inner tube by inner tube box cupling in said inner tube, and slotting be enclosed in inside sealed outer pipe is saved in said inner tube.In described
Guan Shangjie outer walls open up at least two seals groove, install sealing ring in groove, are sealed in the inwall of sealed outer pipe.Saved in said inner tube
External diameter it is identical with the internal diameter basic size of sealed outer pipe, in inner tube energy-conservation insertion sealed outer pipe in, both rely on identical base
This size and sealing ring form sealing.This inserts the pressure-resistant 70MPa of seal apparatus.Section is tubing nipple under said inner tube, and both ends are respectively provided with
Screw thread, section lower end is threaded in said inner tube, and inner tube box cupling sets internal thread.The sealed outer pipe upper end opens up screw thread.
Patent document disclosed above in technical scheme, technique effect and the technical problem of solution all with the utility model not
It is identical.
Utility model content
The purpose of this utility model, which is to provide, changes well mouth sealing device, and well head is changed until changing well head knot from initial
Beam, entirely change well head construction and accomplished well control essential safety, effectively avoid and change well head operation band under well head opening-wide state
The well control hidden danger come.
In order to reach above-mentioned purpose, the utility model employs following technical scheme, changes well mouth sealing device, including center
Pipe, rotation pipe, slips assembly, described, the slips assembly is arranged on center pipe outer wall, and rotation is additionally provided with outside the central tube
Tube, the rotation pipe are connected through a screw thread mode and are connected with slips assembly upper end.
The center pipe outer wall is additionally provided with leather cup assembly, and the leather cup assembly is located at below slips assembly.
The slips assembly includes taper sheath, block teeth, slip sleeve, and the taper sheath is spacing to be fixed in the pipe outer wall of center,
The block teeth by itself inner conical surface and taper sheath male cone (strobilus masculinus) it is in mating connection.
The block teeth upper end connects slip sleeve, and slips set upper side inwall is connected through a screw thread mode with rotation pipe outer wall and is connected
Connect, rotation pipe drives slip sleeve and block teeth axial movement.
The central tube upper end is connected with box cupling.
Bearing is provided between the rotation inside pipe wall and center pipe outer wall.
Compared to prior art, the utility model has the advantages that：
1st, well mouth sealing device is changed to realize pit shaft well head by opening-wide state when well head construction is changed in underground work and close
Closed state, so as to conveniently carry out changing well head construction, and effectively prevent the well kick and blowout out of control thing that change well head construction burst
Therefore generation.
2nd, top oil pipe plug valve open flow, observation well can be utilized after well head burst well kick is changed by changing well mouth sealing device
Interior pressure simultaneously is implemented to wash kill-job construction, is easy to take lower step measure to construct.
3rd, it is laborsaving time saving, it is stable and firm.
4th, small volume, it is in light weight, installation it is simple, easy to operation.Only need two people that installation, operation transport can be achieved during installation
When place in room tool box on duty and to transport in the lump.
Brief description of the drawings
Fig. 1 is the structural representation for changing well mouth sealing device.
In figure：1st, central tube；2nd, rotation pipe；3rd, slip sleeve；4th, block teeth；5th, taper sheath；6th, leather cup assembly.
Embodiment
Relevant detailed description of the present utility model and technology contents, coordinate brief description of the drawings as follows, but accompanying drawing is only to refer to
With purposes of discussion, not it is used for being any limitation as the utility model.
As shown in Figure 1, well mouth sealing device, including central tube 1, rotation pipe 2, slips assembly, described, the slips are changed
Assembly is arranged on center pipe outer wall, and rotation pipe is additionally provided with outside the central tube, and the rotation pipe is connected through a screw thread mode
It is connected with slips assembly upper end.The central tube upper end is connected with box cupling.Set between the rotation inside pipe wall and center pipe outer wall
It is equipped with bearing.The center pipe outer wall is additionally provided with leather cup assembly 6, and the leather cup assembly is located at below slips assembly.
The slips assembly includes taper sheath 5, block teeth 4, slip sleeve 3, and the taper sheath is spacing to be fixed on center pipe outer wall
On, the block teeth by itself inner conical surface and taper sheath male cone (strobilus masculinus) it is in mating connection.The block teeth upper end connects slip sleeve,
Slips set upper side inwall is connected through a screw thread mode with rotation pipe outer wall and is connected, and rotation pipe drives slip sleeve and block teeth axially to move
It is dynamic.
The top of central tube 1 is that oil pipe internal thread connected pipes lift short circuit and plug valve (spherical valve), central tube bottom are
The external screw thread connection rotation internal thread of pipe 2 and until leather cup assembly 6 is enclosed on central tube, leather cup be taper leather cup and with sleeve pipe
Chamber is interference fit, and leather cup afterbody has chamfering to be easy to go into the well and be not hampered, and rotation pipe bottom is that external screw thread connects slips assembly
3, slips assembly bottom connection leather cup assembly, slips 4 is embedded on slip sleeve 5, when job execution needs to change well as requested
During mouth, the device is connected into lifting sub (above connecing oil pipe plug valve) and lifts tripping in sleeve pipe upper space, top, which reserves, to be easy to
Pipe wrench distance to be beaten, then blocks central tube 1 with pipe wrench, another pipe wrench blocks rotation pipe 2 and rotated, at this moment the upward sliding of slip sleeve 5,
The movement on taper sheath of block teeth 4 is tightly stuck in internal surface of sleeve pipe, and now device is fixed in sleeve pipe in the presence of slips support
Should not fall well on wall, cut-out tap valve makes center tube passage sealing, while leather cup and with cannula cavity because being interference fit
Realize that annular space seals, now, former well head can be pulled down and then the well head for needing to change is installed, you can carry out changing well head operation construction.
Entirely change well head work progress well head to be closed, if installing after well head has pressure to put at the plug valve of top in well
Pressure, which is observed, simultaneously formulates lower step kill-job measure, changes well head and finishes when needing to exit, and dextrorotation rotation pipe 2, block teeth 4 are slowly retracted away from covering
Tube wall reaches deblocking purpose.
Well head is in opening-wide state when the utility model changes well head construction by original teams and groups, by strata pressure and periphery
Well influences that well kick and blowout out of control occur at any time, has accomplished that the current well head construction well head that changes is closed, from initial
Change well head until changing well head to terminate, entirely change well head construction and accomplished well control essential safety, effectively avoid well head and open wide
The well control hidden danger changed well head operation and brought under state, meanwhile, the device is laborsaving time saving, stable and firm；Small volume, it is in light weight,
Install simple, easy to operation；The pit shaft sealing changed under well head operation can be smoothly completed.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the scope of the claims of the present utility model, its
He uses the equivalence changes of the utility model patent spirit, all should all belong to the scope of the claims of the present utility model.
Claims (6)
1. change well mouth sealing device, it is characterised in that including central tube, rotation pipe, slips assembly, described, the slips assembly
Installed in center pipe outer wall, rotation pipe is additionally provided with outside the central tube, the rotation pipe is connected through a screw thread mode and card
The connection of watt assembly upper end.
2. according to claim 1 change well mouth sealing device, it is characterised in that the center pipe outer wall is additionally provided with leather cup
Assembly, the leather cup assembly are located at below slips assembly.
3. according to claim 2 change well mouth sealing device, it is characterised in that the slips assembly includes taper sheath, tooth
Block, slip sleeve, the taper sheath is spacing to be fixed in the pipe outer wall of center, the inner conical surface and taper sheath that the block teeth pass through itself
Male cone (strobilus masculinus) is in mating connection.
4. according to claim 3 change well mouth sealing device, it is characterised in that the block teeth upper end connects slip sleeve, card
Watt set upper side inwall is connected through a screw thread mode with rotation pipe outer wall and is connected, and rotation pipe drives slip sleeve and block teeth axially to move
It is dynamic.
5. according to claim 1 change well mouth sealing device, it is characterised in that the central tube upper end is connected with box cupling.
6. according to claim 4 change well mouth sealing device, it is characterised in that the rotation inside pipe wall and center pipe outer wall
Between be provided with bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721034301.1U CN207161033U (en) | 2017-08-17 | 2017-08-17 | Change well mouth sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721034301.1U CN207161033U (en) | 2017-08-17 | 2017-08-17 | Change well mouth sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207161033U true CN207161033U (en) | 2018-03-30 |
Family
ID=61717000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721034301.1U Expired - Fee Related CN207161033U (en) | 2017-08-17 | 2017-08-17 | Change well mouth sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207161033U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952947A (en) * | 2019-11-22 | 2020-04-03 | 白瑞义 | Wellhead sealing control device |
| CN112554832A (en) * | 2019-09-25 | 2021-03-26 | 中国石油化工股份有限公司 | Trade well head shut-in well device and fishing device |
-
2017
- 2017-08-17 CN CN201721034301.1U patent/CN207161033U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554832A (en) * | 2019-09-25 | 2021-03-26 | 中国石油化工股份有限公司 | Trade well head shut-in well device and fishing device |
| CN112554832B (en) * | 2019-09-25 | 2022-10-25 | 中国石油化工股份有限公司 | Trade well head shut-in well device and fishing device |
| CN110952947A (en) * | 2019-11-22 | 2020-04-03 | 白瑞义 | Wellhead sealing control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180330 Termination date: 20180817 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |