CN201763268U - Flexible telescopic device - Google Patents
Flexible telescopic device Download PDFInfo
- Publication number
- CN201763268U CN201763268U CN2010205293542U CN201020529354U CN201763268U CN 201763268 U CN201763268 U CN 201763268U CN 2010205293542 U CN2010205293542 U CN 2010205293542U CN 201020529354 U CN201020529354 U CN 201020529354U CN 201763268 U CN201763268 U CN 201763268U
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- CN
- China
- Prior art keywords
- suspension joint
- outer tube
- cavity
- sealing ring
- joint
- 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 - Lifetime
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Abstract
The utility model relates to a flexible telescopic device. A coupling is connected with an upper part of a telescopic tube, and the lower part of the telescopic tube and a lower suspension joint are connected together and sealed. An upper suspension joint is connected with an upper part of an external pipe, and the lower part of the external pipe is connected with the lower joint. The telescopic penetrates the upper suspension joint, an external sealing ring is disposed between the lower suspension joint and the external pipe. The lower suspension joint is cooperated with the external pipe, and a lower sealing ring is disposed on the connection part of the external pipe and the lower joint. A cavity is enclosed by an upper suspension joint, an external pipe, a telescopic pipe and a lower suspension joint. A telescopic pipe sealing ring is disposed between the upper suspension joint and the telescopic pipe. An upper sealing ring is disposed on the connection part of the upper suspension joint and the upper part of the external pipe, thereby the cavity is the closed cavity, and filled with gas, which corresponds to spring disposed in the cavity, so that the weight of the lower tool can be overcome during the down-hole process, and the cavity can stay in the contracted state. The utility model is suitable for the water injection wells needed to be elongated during the down-hole working.
Description
Technical field
The utility model belongs to the device that the oilfield oil well tubing string discharges axial force, is a kind of elastic telescopic device.
Background technology
In the separated-zone water infection oil field tubing string,, cause the water injection packer wriggling in the process of annotating and stopping because interlayer pressure difference also can make water injection string elongate or shorten.For addressing this problem, generally be that expansion bend is installed on water injection packer.Be connected for rigidity between telescoping tube and the outer tube in the present expansion bend, cavity between telescoping tube and the outer tube does not seal, as Chinese patent application: 200520087798.4 " annotating the hot expansion bends of vapour well " are exactly this structure, and the expansion bend that uses in the water injection well is exactly this structure at present.The expansion bend of this structure can only be in the state of stretching in the process of going into the well, go into the well and can only shrink after putting in place, can not extend again, therefore, in the water injection well that need extend when being not suitable for being lowered to work in the water injection well.
Summary of the invention
The purpose of this utility model is a kind of elastic telescopic device of design, and it can be gone into the well under the state that contracts, and is suitable for being lowered in the water injection well that need extend when working in the water injection well.
The purpose of this utility model is achieved in that by box cupling, last suspension joint, outer tube, telescoping tube, following suspension joint, the outer tube sealing ring, lower seal, lower contact is formed, box cupling is connected with telescoping tube top, the telescoping tube bottom is connected with following suspension joint and seals, last suspension joint is connected with outer tube top, the outer tube bottom is connected with lower contact, telescoping tube passes suspension joint, the outer tube sealing ring is installed between following suspension joint and the outer tube, following suspension joint cooperates with outer tube, lower seal is installed in outer tube bottom and lower contact junction, last suspension joint, outer tube, telescoping tube, following suspension joint surrounds cavity, last suspension joint, the telescoping tube sealing ring is installed between the telescoping tube, sealing ring is installed in last suspension joint and junction, outer tube top, and making cavity is enclosed cavity.
The beneficial effects of the utility model are: the cavity that last suspension joint, outer tube, telescoping tube, following suspension joint surround is an enclosed cavity, gas is arranged in the enclosed cavity, be equivalent to install in the cavity spring, the weight that can overcome lower tool in the process of going into the well makes it be in contraction state and goes into the well, therefore, the utility model is suitable for being lowered in the water injection well that need extend when working in the water injection well.
Description of drawings
Accompanying drawing 1 is an assembling drawing of the present utility model.
The specific embodiment
1 couple of embodiment of the present utility model describes below in conjunction with accompanying drawing.
As shown in the figure, embodiment of the present utility model is by box cupling 1, last suspension joint 2, last sealing ring 3, telescoping tube sealing ring 4, outer tube 5, telescoping tube 6, following suspension joint 7, outer tube sealing ring 8, lower seal 9, lower contact 10 is formed, box cupling 1 is connected with telescoping tube 6 tops, telescoping tube 6 bottoms are connected with following suspension joint 7 and seal (adopt tubing round thread connect), last suspension joint 2 is connected with outer tube 5 tops, outer tube 5 bottoms are connected with lower contact 10, telescoping tube 6 passes suspension joint 2, outer tube sealing ring 8 is installed between following suspension joint 7 and the outer tube 5, following suspension joint 7 cooperates with outer tube 5, lower seal 9 is installed in outer tube 5 bottoms and lower contact 10 junctions, last suspension joint 2, outer tube 5, telescoping tube 6, following suspension joint 7 surrounds cavity 11, last suspension joint 2, telescoping tube sealing ring 4 is installed between the telescoping tube 6, last suspension joint 2 is installed sealing ring 3 with junction, outer tube 5 top, makes cavity 11 be enclosed cavity.
The volume of cavity 11 is determined by the well shape, specifically by the instrument weight decision that connects under the lower contact 10, the compressive force that produces when making the gas compression in its cavity 11 guarantees that greater than the instrument weight that connects under the lower contact 10 the utility model can not be in extended state in the process of going into the well.Go into the well the back because of water filling with when stopping axial force that water filling causes greater than the compressive force of the generation of the gas in the cavity 11, and the utility model still can extend, and makes the axial force of water injection string obtain balance.Along with the variation of axial force, flexible state of the present invention can change, and therefore, can repeat to reach flexible state in well, can reach elongation state all the time during work.
Claims (1)
1. elastic telescopic device, by box cupling (1), last suspension joint (2), outer tube (5), telescoping tube (6), following suspension joint (7), outer tube sealing ring (8), lower seal (9), lower contact (10) is formed, box cupling (1) is connected with telescoping tube (6) top, telescoping tube (6) bottom is connected with following suspension joint (7) and seals, last suspension joint (2) is connected with outer tube (5) top, outer tube (5) bottom is connected with lower contact (10), telescoping tube (6) passes suspension joint (2), outer tube sealing ring (8) is installed between following suspension joint (7) and the outer tube (5), following suspension joint (7) cooperates with outer tube (5), lower seal (9) is installed in outer tube (5) bottom and lower contact (10) junction, last suspension joint (2), outer tube (5), telescoping tube (6), following suspension joint (7) surrounds cavity (11), it is characterized in that: go up suspension joint (2), telescoping tube sealing ring (4) is installed between the telescoping tube (6), last suspension joint (2) is installed sealing ring (3) with outer tube (5) junction, top, and making cavity (11) is enclosed cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205293542U CN201763268U (en) | 2010-09-04 | 2010-09-04 | Flexible telescopic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205293542U CN201763268U (en) | 2010-09-04 | 2010-09-04 | Flexible telescopic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201763268U true CN201763268U (en) | 2011-03-16 |
Family
ID=43715877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205293542U Expired - Lifetime CN201763268U (en) | 2010-09-04 | 2010-09-04 | Flexible telescopic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201763268U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942971A (en) * | 2010-09-04 | 2011-01-12 | 李永祥 | Elastic expansion device |
| CN104726685A (en) * | 2015-02-12 | 2015-06-24 | 宁波宝新不锈钢有限公司 | Combustion-supporting air conduit and stainless steel hood-type annealing furnace with same |
-
2010
- 2010-09-04 CN CN2010205293542U patent/CN201763268U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942971A (en) * | 2010-09-04 | 2011-01-12 | 李永祥 | Elastic expansion device |
| CN101942971B (en) * | 2010-09-04 | 2014-03-26 | 李永祥 | Elastic expansion device |
| CN104726685A (en) * | 2015-02-12 | 2015-06-24 | 宁波宝新不锈钢有限公司 | Combustion-supporting air conduit and stainless steel hood-type annealing furnace with same |
| CN104726685B (en) * | 2015-02-12 | 2017-03-08 | 宁波宝新不锈钢有限公司 | A kind of comburent air duct and the stainless steel cover type annealing furnace being provided with this comburent air duct |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110316 Effective date of abandoning: 20140326 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110316 Effective date of abandoning: 20140326 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |