CN205330588U - Sealed expansion pipe cluster assembly of long distance for oil drilling - Google Patents
Sealed expansion pipe cluster assembly of long distance for oil drilling Download PDFInfo
- Publication number
- CN205330588U CN205330588U CN201521121579.3U CN201521121579U CN205330588U CN 205330588 U CN205330588 U CN 205330588U CN 201521121579 U CN201521121579 U CN 201521121579U CN 205330588 U CN205330588 U CN 205330588U
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- CN
- China
- Prior art keywords
- sealing
- spiro union
- union portion
- expansion
- screw portion
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Abstract
The utility model discloses a sealed expansion pipe cluster assembly of long distance for oil drilling, including a plurality of end to end's hollow body, be provided with the footpath portion that expands on two adjacent bodys respectively and expand footpath portion down, to go up the tip that expands footpath portion and be provided with first sealed screw portion, the tip that expands footpath portion down is provided with the sealed screw portion of second, and first sealed screw portion and the sealed screw portion of second form labyrinth structure, it is provided with the elastic sealing device who is used for sealing first sealed screw portion and the sealed screw portion's of second joint line crack with the position that the second sealed screw portion to be close to last first sealed screw portion on the inner wall of adjacent body, the utility model discloses behind the expansion pipe metal seal, its sealability reaches more than the 42MPa, bearing capacity with hold the ability of turning round and all above the requirement of borehole operation environment, can reach the operation requirement completely.
Description
Technical field
This utility model relates to a kind of OCTG, more particularly to a kind of in oil exploitation process, drilling well is repaired time the distance sealing expansion tube string assembly that uses。
Background technology
Down-hole seals the operation means being to commonly use in the engineerings such as oil drilling, completion, oil recovery, underground work, it it is the link being frequently encountered by petroleum drilling and mining process, it is all using rubber as sealing member for a long time, but the oil resistant of rubber seal, wear-resisting, high temperature resistant, resistance to abrasion is poor, is insufficient for some particular/special requirements of oil field development。And metal sealing has high temperature resistant, high pressure resistant, corrosion-resistant, life-span length, carries many advantages such as big, is especially suitable for underground work condition as sealed-for-life instrument, metal sealing is being subject to increasingly paying close attention to widely。
The sealing principle of metal seal is: metal sealing is to make down the metal expansion pipe in Oil/gas Well well to produce expanded radially by the method such as mechanically or hydraulically, expansion tube produces plastic deformation, making expansion tube be close on the sleeve pipe of outer layer, metal expansion pipe produces interference seal with sleeve pipe。
Although metal sealing has more advantage, but, in petroleum drilling and mining, the requirement of expansion pipe column is also higher, do not merely have to that there is enough intensity, tough, high temperature resistant, erosion resistant, wear-resistant and resistance to break, present expansion tube is unreasonable due to structural design, plastic deformation is easily generated stress and concentrates, and greatly reduces the tough of expansion tube and overall intensity, shortens the service life of expansion tube。
It addition, along with the continuous popularization of bulged tube technology, bulged tube technology strengthens rapidly at Oil Field application well time。Carry out in the process of expansion operation at many expansion tubes, threaded intensity between expansion tube and sealing are to ensure that construction safety is crucial reliably, but owing to the tube wall of great majority expansion at present is relatively thin, cause that in expansion tube screw thread design, box thread annular groove wall thickness is very weak。When the instrument of expansion is by the threaded connection place of expansion tube, it is bigger that the screw thread of threaded connection place is subject to axial load produced by hydraulic coupling, box thread place is easy to produce stress concentration so after the plastic deformation occurs, causes screw thread impaired and seal failure, even results in great down-hole accident。
Utility model content
Problem to be solved in the utility model is to overcome the problems referred to above, it is provided that a kind of plastic deformation stress concentration is little, bulk strength is high, the reliable sealing expansion pipe for drilling oil string assembly of long service life, attachment security。
In order to solve the problems referred to above, this utility model by the following technical solutions:
A kind of petroleum drilling and mining distance sealing expansion tube string assembly, body including several end to end hollows, two adjacent bodys are respectively arranged with expansion footpath portion and lower expansion footpath portion, the end in upper expansion footpath portion is provided with the first sealing spiro union portion, the end in lower expansion footpath portion is provided with the second sealing spiro union portion, and first seals spiro union portion and second seals spiro union portion formation labyrinth structure；The inwall of adjacent body seals spiro union portion near upper first and the second position sealing spiro union portion is provided with the elastic sealing device connecting gap sealing spiro union portion for sealing the first sealing spiro union portion and second。
The following is this utility model further optimization to such scheme:
Elastic sealing device includes sealing spiro union portion and second across first and seals the annular seal pocket connecting gap of spiro union portion, is provided with gasket seal in annular seal pocket。
Described annular seal pocket is provided with its radical length strip mouth groove less than the radical length of annular seal pocket towards the position of the inwall of body, strip mouth groove is provided with the flexure strip of arc, and the two ends of described flexure strip are respectively inserted in annular seal pocket to be compressed on the two ends up and down of gasket seal。
Optimize further: described body is metal tube, and the excircle of described body is provided with some roads annular protrusion。The root of described annular protrusion is circular arc, it is possible to reduce the stress concentration that expansion tube produces in plastic history。
Described expansion tube is with method mechanically or hydraulically, from lower to upper, body is made to deform by pulling force or pressure, when pressure is by annular protrusion place, annular protrusion place expands, enlarged outside diameter, the external diameter of its expansion exceedes the inwall of sleeve pipe, the inwall of squeezing bushing, produces metal interference with the inwall of sleeve pipe and coordinates, form metal sealing。
When pressure is by flexure strip place, by flexure strip to external compression gasket seal, make gasket seal tightly seal up the first sealing spiro union portion and second and seal the connection gap of spiro union portion, it is prevented that liquid or gas in body penetrate into outside body, add the sealing of body junction。
This utility model can improve the bulk strength of expansion tube after deformation, thus extending the service life of expansion tube；Achieve the sealing that multiple expansion tube connects；Simple in construction, construction reliability is high, good airproof performance, and leaves very big run through casing size, greatly improves the Practical Performance of sealing。After this utility model expansion tube metal sealing, its sealability reaches more than 42MPa, bearing capacity and bearing torque ability and all exceedes the requirement of working environment at coal mines, is fully able to and reaches instructions for use。
Below in conjunction with drawings and Examples, the utility model is described in further detail。
Accompanying drawing explanation
Accompanying drawing1 is the structural representation of this utility model embodiment；
Accompanying drawing 2 is the I place enlarged drawing in accompanying drawing 1。
In figure: 1-body；2-inboard wall of tube body；3-first seals spiro union portion；4-annular protrusion；Footpath portion is expanded under 5-；6-upper expansion footpath portion；7-strip mouth groove；8-annular seal pocket；9-gasket seal；10-flexure strip；11-second seals spiro union portion。
Detailed description of the invention
Embodiment 1, as it is shown in figure 1, a kind of petroleum drilling and mining distance sealing expansion tube string assembly, including the body 1 of several end to end hollows, described body 1 is metal tube, and the excircle of described body 1 is provided with some roads annular protrusion 4。The root of described annular protrusion 4 is circular arc, it is possible to reduce the stress concentration that expansion tube produces in plastic history。
Two adjacent bodys 1 are respectively arranged with expansion footpath portion 6 and lower expansion footpath portion 5, upper expansion footpath portion 6 and portion 5, lower expansion footpath threaded。
The end in upper expansion footpath portion 6 is provided with the first sealing spiro union portion 3, and the end in lower expansion footpath portion 5 is provided with the second sealing spiro union portion 11, and the first sealing spiro union portion 3 and the second sealing spiro union portion 11 form labyrinth structure。
The inwall 2 of adjacent body 1 seals spiro union portion 3 near upper first and the second position sealing spiro union portion 11 is provided with the elastic sealing device connecting gap for sealing the first sealing spiro union portion 3 and the second sealing spiro union portion 11。
Elastic sealing device includes, across the first annular seal pocket 8 connecting gap sealing spiro union portion 3 and the second sealing spiro union portion 11, being provided with gasket seal 9 in annular seal pocket 8。
Described annular seal pocket 8 is provided with its radical length strip mouth groove 7 less than the radical length of annular seal pocket 8 towards the position of the inwall 2 of body 1, strip mouth groove 7 is provided with the flexure strip 10 of arc, and the two ends of described flexure strip 10 are respectively inserted in annular seal pocket 8 to be compressed on the two ends up and down of gasket seal 9。
Described expansion tube is with method mechanically or hydraulically, from lower to upper, body 1 is made to deform by pulling force or pressure, when pressure is by annular protrusion 4 place, annular protrusion 4 place expands, enlarged outside diameter, the external diameter of its expansion exceedes the inwall of sleeve pipe, the inwall of squeezing bushing, produces metal interference with the inwall of sleeve pipe and coordinates, form metal sealing。
When pressure is by flexure strip 10 place, by flexure strip 10 to external compression gasket seal 9, gasket seal 9 is made tightly to seal up the connection gap of the first sealing spiro union portion 3 and the second sealing spiro union portion 11, prevent the liquid in body 1 or gas from penetrating into outside body, add the sealing of body junction。
The foregoing is only preferred embodiment of the present utility model, it is not limited to this utility model, although this utility model being described in detail with reference to previous embodiment, for a person skilled in the art, technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature carries out equivalent replacement。All within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within protection domain of the present utility model。
Claims (4)
1. a petroleum drilling and mining distance sealing expansion tube string assembly, body including several end to end hollows, it is characterized in that: two adjacent bodys are respectively arranged with expansion footpath portion and lower expansion footpath portion, the end in upper expansion footpath portion is provided with the first sealing spiro union portion, the end in lower expansion footpath portion is provided with the second sealing spiro union portion, and first seals spiro union portion and second seals spiro union portion formation labyrinth structure；
The inwall of adjacent body seals spiro union portion near upper first and the second position sealing spiro union portion is provided with the elastic sealing device connecting gap sealing spiro union portion for sealing the first sealing spiro union portion and second。
2. a kind of petroleum drilling and mining distance sealing expansion tube string assembly according to claim 1, it is characterized in that: elastic sealing device includes sealing spiro union portion and second across first and seals the annular seal pocket connecting gap of spiro union portion, is provided with gasket seal in annular seal pocket。
3. a kind of petroleum drilling and mining distance sealing expansion tube string assembly according to claim 2, it is characterized in that: described annular seal pocket is provided with its radical length strip mouth groove less than the radical length of annular seal pocket towards the position of the inwall of body, strip mouth groove is provided with the flexure strip of arc, and the two ends of described flexure strip are respectively inserted in annular seal pocket to be compressed on the two ends up and down of gasket seal。
4. a kind of petroleum drilling and mining distance sealing expansion tube string assembly according to claim 3, it is characterised in that: described body is metal tube, and the excircle of described body is provided with some roads annular protrusion, and the root of described annular protrusion is circular arc。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521121579.3U CN205330588U (en) | 2015-12-31 | 2015-12-31 | Sealed expansion pipe cluster assembly of long distance for oil drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521121579.3U CN205330588U (en) | 2015-12-31 | 2015-12-31 | Sealed expansion pipe cluster assembly of long distance for oil drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205330588U true CN205330588U (en) | 2016-06-22 |
Family
ID=56312631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521121579.3U Expired - Fee Related CN205330588U (en) | 2015-12-31 | 2015-12-31 | Sealed expansion pipe cluster assembly of long distance for oil drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205330588U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108543352A (en) * | 2018-06-14 | 2018-09-18 | 成都易态科技有限公司 | Filter core connector and its component |
-
2015
- 2015-12-31 CN CN201521121579.3U patent/CN205330588U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108543352A (en) * | 2018-06-14 | 2018-09-18 | 成都易态科技有限公司 | Filter core connector and its component |
| CN108543352B (en) * | 2018-06-14 | 2023-12-12 | 成都易态科技有限公司 | Filter element joint and assembly thereof |
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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 |
Granted publication date: 20160622 Termination date: 20201231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |