CN201747319U - Reverse-pressurizing multi-stage expansion cylinder - Google Patents
Reverse-pressurizing multi-stage expansion cylinder Download PDFInfo
- Publication number
- CN201747319U CN201747319U CN2010202596670U CN201020259667U CN201747319U CN 201747319 U CN201747319 U CN 201747319U CN 2010202596670 U CN2010202596670 U CN 2010202596670U CN 201020259667 U CN201020259667 U CN 201020259667U CN 201747319 U CN201747319 U CN 201747319U
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- cylinder
- cylinder body
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- tubing string
- stage expansion
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Abstract
The utility model provides reverse-pressurizing multi-stage expansion cylinder suitable for work over operation with pressure. The cylinder is formed by sheathing and overlapping a plurality of cylinder bodies from small to large and from inside to outside; an oil inlet and an outlet are respectively arranged on the upper part and the lower part of the most outside cylinder body; oil tubes are arranged on the walls of the cylinder bodies except the most outside one and the most inside one along the axial direction; the upper ends and the lower ends of the oil tubes are communicated with the inside and outside gaps of the cylinder bodies respectively. The reverse-pressurizing multi-stage expansion cylinder has a reasonable structure, is directly arranged into the combination of a blowout presenter and a safety slip when in use, is convenient to be operated, effectively controls the movement of a tubing string, enhances the safety and reliability, and simultaneously increases the running and pulling strokes of the tubing string when the pressure inside a well is relatively high, and improves the working efficiency of the work over operation with pressure.
Description
Technical field
The utility model relates to a kind of oil field well workover equipment, and particularly a kind of band that is applicable to is pressed the anti-pressurization multi-stage expansion cylinder of workover treatment.
Background technology
Band presses workover treatment to be in not kill-job, not discharge under the situation of the strata pressure in the pit shaft, presses the profit gas well of duty to keep in repair to band.Usually the band pressure well workover equipment that adopts at present mainly is the short stroke formula, it is to be equipped with instead pressurize oil cylinder and preventer, safety slip combination on existing workover rig basis, by preventer, safety slip combination and the anti-oil cylinder that pressurizes tubing string is carried out the segmentation pressurization, realize the rountrip of tubing string under the band pressure condition.Yet existing preventer, safety slip combination are setting respectively with anti-pressurized cylinder, and since preventer, the outfit of safety slip combination and the restriction of the anti-oil cylinder self structure of pressurizeing, feasible little a, inefficiency of down stroke that uses inconvenience, parts rapid wear, tubing string.
The utility model content
For overcoming the deficiencies in the prior art part, the utility model provide a kind of rational in infrastructure, easy to operate, security reliability strong, the anti-pressurization multi-stage expansion cylinder of high efficiency.
The technical scheme that its technical problem that solves the utility model adopts is: formed by cylinder body intussusception little extremely greatly, from inside to outside by a plurality of, be respectively equipped with oil inlet and outlet and evacuation port in the upper and lower of outermost cylinder body; Be provided with the oil duct of offering vertically in the casing wall of other cylinder body except that outermost cylinder body and the most inboard cylinder body, the upper and lower side of described oil duct interlinks with the space, the interior outside of place cylinder body respectively.
The beneficial effects of the utility model are: it is rational in infrastructure, directly be loaded on during use in preventer, the safety slip combination, easy to operate, motion to tubing string has realized effective control, strengthened security reliability, increased simultaneously tubing string at borehole pressure than the down stroke that rises under the higher state, improve the operating efficiency that band is pressed workover treatment.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1,2,3 and 4 is cylinder body, and 1-1 is an oil inlet and outlet, and 1-2 is that evacuation port, 1-3 are lower flange, and 2-1 and 3-1 are oil duct, and 4-1 is a upper flange.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
The utility model is formed by cylinder body intussusception little extremely greatly, from inside to outside by a plurality of, be respectively equipped with oil inlet and outlet 1-1 and evacuation port 1-2 in the upper and lower of outermost cylinder body 1, and be respectively equipped with lower flange 1-3, upper flange 4-1 in the lower end of outermost cylinder body 1, the upper end of the most inboard cylinder body 4; In the casing wall of cylinder body 2 and 3, be provided with the oil duct 2-1 and the 3-1 that offer vertically, the upper and lower side of described oil duct 2-1 interlinks with the space, the interior outside of place cylinder body 2 respectively, the upper and lower side of described oil duct 3-1 interlinks with the space, the interior outside of place cylinder body 3 respectively, thereby constitutes a complete oil circuit.
During use, at first the utility model is installed in preventer, the safety slip combination, described preventer, safety slip combination comprise four from bottom to top continuous successively ram preventer groups, following annular preventer, go up annular preventer and last safety slip; The utility model place and above-mentioned following annular preventer and last annular preventer between.Again with preventer, safety slip aggregate erection on the well head four-way, and oil inlet and outlet 1-1 and hydraulic system that other establishes interlinked, evacuation port 1-2 goes up and connects exhaust-valve.
When borehole pressure may make tubing string generation lateral bending more greatly, then the utility model stretches upwards under the effect of borehole pressure, work together with last annular preventer and last safety slip one in wellhead assembly preventer, the safety slip combination, set upright tubing string, avoid tubing string 7 that lateral bending takes place; Removing of tubing string presses workover rig to finish by the band that other establishes at this moment, perhaps finished by the utility model.The utility model stretches upwards under the effect of borehole pressure, and the last annular preventer that drives in preventer, the safety slip combination seals up tubing string, use safety slip chucking tubing string again, following preventer and the safety slip of the utility model all is in open mode, relies on borehole pressure that tubing string is tripped out; In tripping out the course of action of tubing string, oil inlet and outlet 1-1 is to the hydraulic system oil return, and the speed oil that goes out by control oil inlet and outlet 1-1, can control the speed that trips out tubing string.When being pressed into the tubing string operation, close down annular preventer, use safety slip chucking tubing string, press by the well in the anti-multi-stage expansion cylinder that pressurizes of atmospheric valve emptying, then to the oil inlet and outlet 1-1 of anti-pressurization multi-stage expansion cylinder input hydraulic oil, anti-pressurization multi-stage expansion cylinder shrinks, and tubing string can be pressed in the well.Remove in the process whole, tubing string and annular preventer do not relatively move, the glue core does not does not wear and tear, improved the application life that preventer, safety slip make up, simultaneously, because this anti-pressurization multi-stage expansion cylinder is that multistage intussusception forms, can have than higher stroke, thereby increased tubing string at borehole pressure than the down stroke that rises under the higher state, improve the operating efficiency that band is pressed workover treatment.
Claims (1)
1. the anti-multi-stage expansion cylinder that pressurizes is characterized in that: formed by cylinder body intussusception little extremely greatly, from inside to outside by a plurality of, be respectively equipped with oil inlet and outlet and evacuation port in the upper and lower of outermost cylinder body; Be provided with the oil duct of offering vertically in the casing wall of other cylinder body except that outermost cylinder body and the most inboard cylinder body, the upper and lower side of described oil duct interlinks with the space, the interior outside of place cylinder body respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202596670U CN201747319U (en) | 2010-07-15 | 2010-07-15 | Reverse-pressurizing multi-stage expansion cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202596670U CN201747319U (en) | 2010-07-15 | 2010-07-15 | Reverse-pressurizing multi-stage expansion cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201747319U true CN201747319U (en) | 2011-02-16 |
Family
ID=43582002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202596670U Expired - Fee Related CN201747319U (en) | 2010-07-15 | 2010-07-15 | Reverse-pressurizing multi-stage expansion cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201747319U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269197A (en) * | 2011-07-21 | 2011-12-07 | 淮安天工传动科技有限公司 | Multi-stage double-acting oil cylinder of hydraulic rail jack |
| CN102400975A (en) * | 2011-11-24 | 2012-04-04 | 湖南特力液压有限公司 | Secondary stretching and retracting hydraulic cylinder and hydraulic equipment |
| CN108106490A (en) * | 2017-11-26 | 2018-06-01 | 四川华庆机械有限责任公司 | A kind of big impulse stroke balanced controls |
| CN113969917A (en) * | 2021-10-26 | 2022-01-25 | 马庆国 | Multistage hydraulic cylinder |
| CN113969915A (en) * | 2021-10-26 | 2022-01-25 | 马庆国 | Multistage hydraulic cylinder capable of improving bearing capacity |
| CN113969916A (en) * | 2021-10-26 | 2022-01-25 | 马庆国 | Low-pressure-maintaining multi-stage hydraulic cylinder |
-
2010
- 2010-07-15 CN CN2010202596670U patent/CN201747319U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269197A (en) * | 2011-07-21 | 2011-12-07 | 淮安天工传动科技有限公司 | Multi-stage double-acting oil cylinder of hydraulic rail jack |
| CN102400975A (en) * | 2011-11-24 | 2012-04-04 | 湖南特力液压有限公司 | Secondary stretching and retracting hydraulic cylinder and hydraulic equipment |
| CN102400975B (en) * | 2011-11-24 | 2013-01-09 | 湖南特力液压有限公司 | Secondary stretching and retracting hydraulic cylinder and hydraulic equipment |
| CN108106490A (en) * | 2017-11-26 | 2018-06-01 | 四川华庆机械有限责任公司 | A kind of big impulse stroke balanced controls |
| CN113969917A (en) * | 2021-10-26 | 2022-01-25 | 马庆国 | Multistage hydraulic cylinder |
| CN113969915A (en) * | 2021-10-26 | 2022-01-25 | 马庆国 | Multistage hydraulic cylinder capable of improving bearing capacity |
| CN113969916A (en) * | 2021-10-26 | 2022-01-25 | 马庆国 | Low-pressure-maintaining multi-stage hydraulic cylinder |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110216 Termination date: 20170715 |