CN202064858U - Tubing string anti-ejection device in workover well - Google Patents
Tubing string anti-ejection device in workover well Download PDFInfo
- Publication number
- CN202064858U CN202064858U CN2011201629811U CN201120162981U CN202064858U CN 202064858 U CN202064858 U CN 202064858U CN 2011201629811 U CN2011201629811 U CN 2011201629811U CN 201120162981 U CN201120162981 U CN 201120162981U CN 202064858 U CN202064858 U CN 202064858U
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- CN
- China
- Prior art keywords
- tubing string
- slips
- ejection device
- well
- workover treatment
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model discloses a tubing string anti-ejection device in a workover well, which is used in petroleum industry for preventing a workover tubing string from ejecting to cause accidents and guaranteeing production safety. The anti-ejection device comprises an upper flange, a lower flange, a tubing string pre-clamping mechanism, an operating handle and a spring, wherein the upper flange is connected with the lower flange; the tubing string pre-clamping mechanism is arranged in the upper flange and the lower flange; the spring is arranged below the tubing string pre-clamping mechanism; and the operating handle is connected with the tubing string pre-clamping mechanism. The anti-ejection device is arranged on a wellhead, so that the aim of preventing ejection can be fulfilled by preventing the tubing string in the well from moving upwards during workover, the production safety can be guaranteed, and full preparation time is provided for treating overflow or well blowout in the well.
Description
Technical field
The utility model relates to the workover rig of petroleum industry, and particularly tubing string is prevented ejection device in the workover treatment well, is installed in the well head of well in operation, prevents to scurry on the well workover tubing string to cause the accident, and guarantees production safety.
Background technology
At present, oil field oil, gas, well are in workover treatment, in using processes such as drilling rod drilling out, cover mill, milling, thread making, if borehole pressure increases suddenly, might cause brill, mill, scurry on bistrique and the tubing string that is attached thereto, even it is outer and cause the accident to be ejected well by pressure.At present also there is not a kind of special tool to prevent the generation of this type of accident.
Summary of the invention
The utility model is exactly to provide the anti-ejection device of tubing string in the workover treatment well at the problems referred to above, in the workover treatment process, can prevent to scurry on the tubing string to have an accident, can guarantee the safety of tubing string in well again, carry out early-stage preparations, guarantee safety in production for overflow or blowout in the processing well.
For achieving the above object, by the following technical solutions: the anti-ejection device of tubing string comprises upper flange plate, lower flange, the pre-clamp mechanism of tubing string, control crank and spring in the workover treatment well, upper flange plate is connected with lower flange, its inner pre-clamp mechanism of tubing string of installing, spring is contained in the below of the pre-clamp mechanism of tubing string, and control crank is connected with the pre-clamp mechanism of tubing string.
The utlity model has following useful effect: the utility model is installed in well head, and in workover treatment, because the slips rail chair is a conical internal cavity, slips is in contact condition along moving with tubing string on the long rails in the slips rail chair under the effect of spring.Slip insert is the declivity tooth, towards well head.If borehole pressure increases suddenly, last push pipe post, tubing string drive slips and move in long rails, owing to slips is along moving on the long rails of conical internal cavity, more upwards move tightly more, can effectively tighten tubing string.Prevented that tubing string from moving on continuing, reached the purpose on anti-top, can guarantee production safety,, had tangible economic benefit and social benefit for overflow or the blowout of handling in the well provides sufficient time.
Description of drawings
Fig. 1 is an internal construction schematic diagram of the present utility model.
Fig. 2 is the utility model front appearance schematic diagram.
Fig. 3 is the schematic appearance of the utility model " L " type handle groove.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed description: referring to Fig. 1,
The anti-ejection device of tubing string comprises upper flange plate 1, lower flange 5, the pre-clamp mechanism of tubing string, control crank 7 and spring 8 in the workover treatment well, upper flange plate 1 is connected with lower flange 5, its inner pre-clamp mechanism of tubing string of installing, spring 8 is contained in the below of the pre-clamp mechanism of tubing string, and control crank 7 is connected with the pre-clamp mechanism of tubing string.Between upper flange plate 1 and lower flange 5, screw 4 is housed.The pre-clamp mechanism of tubing string comprises slips rail chair 2, slips 6 and slip spider 3, and slips 6 and slip spider 3 are installed in the slips rail chair 2, and slip spider 3 is positioned at the below of slips 6.The profile of slips rail chair 2 cooperates with the inner chamber of upper flange plate 1, its inner chamber is a conical internal cavity, and three long rails evenly are set on its conical internal cavity.Slips 6 is provided with three, and cambered surface is provided with slip insert within it, and the centre bore of three slips 6 involutory back compositions cooperates with tubing string in the well; The extrados of slips 6 is that the taper cambered surface cooperates with the conical internal cavity of slips rail chair 2, and its extrados is provided with railroad shoe and cooperates with the long rails of slips rail chair 2 inner chambers.Slip insert on slips 6 intrados is the declivity tooth, can clamp not slippage of tubing string.The cylindrical shell of upper flange plate 1 is provided with " L " type handle groove 9, and control crank 7 passes this handle groove and is connected with slip spider 3, referring to Fig. 2 and Fig. 3.Spring 8 is stuck on the bottom cylindrical of slip spider 3, holds out against slip spider 3, makes slips 6 give the pre-clamping force of tubing string in the well.
During use, the anti-apical organ of this tubing string is installed on the wellhead flange dish, lower flange 5 is connected by the well head bolt with the wellhead flange dish.Tubing string is gone into the well or when tubing string proposed in well, press down and forward in translot along the vertical slot of " L " type handle groove 9 in the upper flange plate 1 control crank 7, slips 6 is moved down along the long rails of slips rail chair 2, it is big that the centre bore that slips 6 is combined to form becomes, pass tubing string in the well, allow the interior tubing string of well pass through smoothly.When tubing string in the well has pre-top to show, move on in the vertical slot in the translot with control crank 7 " L " type handle groove 9 from upper flange plate 1.Under the effect of spring 8, slips 6 touches tubing string in the well along moving on the long rails of slips rail chair 2, and tubing string has been realized pre-clamping in 6 pairs of wells of three slips.
If tubing string moves suddenly, under the effect of the long rails of slips 6 declivity teeth and slips rail chair 2, slips 6 with on move, tubing string has been realized clamping, and on the big more then clamping force of the amount of moving big more, reached anti-top purpose.
If finish well workover, in the time of need drawing off tubing string, control crank 7 is pressed down and puts into the translot of " L " type handle groove 9, slips 6 is moved down, break away from tubing string in the well, tubing string can be unloaded, move apart outside the well.
Claims (7)
1. tubing string is prevented ejection device in the workover treatment well, it is characterized in that comprising upper flange plate (1), lower flange (5), the pre-clamp mechanism of tubing string, control crank (7) and spring (8), upper flange plate (1) is connected with lower flange (5), its inner pre-clamp mechanism of tubing string of installing, spring (8) is contained in the below of the pre-clamp mechanism of tubing string, and control crank (7) is connected with the pre-clamp mechanism of tubing string.
2. the anti-ejection device of tubing string in the workover treatment well according to claim 1, it is characterized in that the pre-clamp mechanism of tubing string comprises slips rail chair (2), slips (6) and slip spider (3), slips (6) and slip spider (3) are installed in the slips rail chair (2), and slip spider (3) is positioned at the below of slips (6).
3. the anti-ejection device of tubing string is characterized in that the profile of described slips rail chair (2) cooperates with the inner chamber of upper flange plate (1), its inner chamber is a conical internal cavity in the workover treatment well according to claim 2, and three long rails evenly are set on its conical internal cavity.
4. the anti-ejection device of tubing string is characterized in that described slips (6) is provided with three in the workover treatment well according to claim 2, and cambered surface is provided with slip insert within it, and the centre bore that the involutory back of three slips (6) is formed cooperates with tubing string in the well; The extrados of slips (6) is that the taper cambered surface cooperates with the conical internal cavity of slips rail chair (2), and its extrados is provided with railroad shoe and cooperates with the long rails of slips rail chair (2) inner chamber.
5. according to the anti-ejection device of tubing string in claim 2 or the 4 described workover treatment wells, it is characterized in that the slip insert on described slips (6) intrados is the declivity tooth.
6. the anti-ejection device of tubing string is characterized in that the cylindrical shell of upper flange plate (1) is provided with " L " type handle groove (9) in the workover treatment well according to claim 1, and control crank (7) passes this handle groove and is connected with slip spider (3).
7. the anti-ejection device of tubing string is characterized in that described spring (8) is stuck on the bottom cylindrical of slip spider (3) in the workover treatment well according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201629811U CN202064858U (en) | 2011-05-12 | 2011-05-12 | Tubing string anti-ejection device in workover well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201629811U CN202064858U (en) | 2011-05-12 | 2011-05-12 | Tubing string anti-ejection device in workover well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202064858U true CN202064858U (en) | 2011-12-07 |
Family
ID=45058726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201629811U Expired - Fee Related CN202064858U (en) | 2011-05-12 | 2011-05-12 | Tubing string anti-ejection device in workover well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202064858U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939313A (en) * | 2017-10-31 | 2018-04-20 | 中国石油天然气股份有限公司 | For removing the well head limiter of hollow pipe nipple |
| CN108104739A (en) * | 2017-12-19 | 2018-06-01 | 中国石油天然气股份有限公司 | Slip-type can cross ejection device on the automatic preventing oil pipe of box cupling |
-
2011
- 2011-05-12 CN CN2011201629811U patent/CN202064858U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939313A (en) * | 2017-10-31 | 2018-04-20 | 中国石油天然气股份有限公司 | For removing the well head limiter of hollow pipe nipple |
| CN108104739A (en) * | 2017-12-19 | 2018-06-01 | 中国石油天然气股份有限公司 | Slip-type can cross ejection device on the automatic preventing oil pipe of box cupling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20120512 |