CN203114193U - Tubular column connecting joint for multilateral well cementation - Google Patents
Tubular column connecting joint for multilateral well cementation Download PDFInfo
- Publication number
- CN203114193U CN203114193U CN 201320155962 CN201320155962U CN203114193U CN 203114193 U CN203114193 U CN 203114193U CN 201320155962 CN201320155962 CN 201320155962 CN 201320155962 U CN201320155962 U CN 201320155962U CN 203114193 U CN203114193 U CN 203114193U
- Authority
- CN
- China
- Prior art keywords
- joint body
- tubular column
- top connection
- lower contact
- well cementation
- 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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- Earth Drilling (AREA)
Abstract
The utility model relates to a tubular column connecting joint for multilateral well cementation. The tubular column connecting joint for the multilateral well cementation comprises an upper joint body and a lower joint body. A circular truncated cone is arranged on the inner wall of the upper joint body in a machined mode. An O-shaped sealing ring is arranged at the portion, below the circular truncated cone, of the inner wall of the upper joint body. An outer boss is arranged at the upper portion of the lower joint body in a machined mode. The lower joint body is arranged inside the upper joint body in a lifted and hung mode. An annular groove is formed in the portion, exposed out of a lower port of the upper joint body, of the outer wall of the lower joint body. A baffle ring is arranged inside the annular groove. The outer diameter of the baffle ring is larger than the inner diameter of the upper joint body. When tubular columns are connected through the connecting joint, an upper portion tubular column and a lower portion tubular column are fixed, the connecting joint is directly rotated, and the aim of tubular column connecting is achieved. The tubular column connecting joint for the multilateral well cementation is simple in structure and high in connecting success rate, labor intensity is greatly reduced, and construction time is saved.
Description
Technical field
The utility model relates to a kind of tubing string fastening means that uses in the oil drilling construction.
Background technology
The branch hole drilling completion technique can improve the rate of oil and gas recovery, but since the limitation of complexity of Multilateral Wells itself development of Multilateral Wells technology, one of them problem is, at present, domestic or external Multilateral Wells technology no matter, the pipe string structure is all very complicated when branch cements the well, need be lowered to outer tube and interior pipe simultaneously mostly, require outer tube and interior pipe screwed connection this moment, can realize connecting so certainly will need to rotate tubing string or lower tubular column in the connection procedure, but the tubing string quality is big, rotation is very difficult, in addition, when last lower tubular column connected contraposition, mobile any one tubing string also was unfavorable for operating very much, in a word, the site operation that branch's well cementation pipe polyphone connects is very difficult, and exists certain potential safety hazard.
Summary of the invention
The purpose of this utility model is at the problem that exists in the background technology, the pipe polyphone bonding tool that uses when providing a kind of branch to cement the well, and fashionable this fastening means of using can conveniently connect under tubing string, has reduced labour intensity, has simplified construction technology.
For achieving the above object, the technical scheme that the application adopts is: branch's well cementation tubing string jointing, comprise top connection and lower contact, upper and lower joint is cylindric, the female thread structure that is processed with suitable for reading of top connection wherein, the inwall of top connection arranges frustum cone structure, on the top connection inwall below the frustum cone structure O RunddichtringO is set; The lower end of described lower contact is processed with external thread structure, the top of lower contact is processed with outer lug boss, the external diameter of outer lug boss is greater than the internal diameter of round platform, lower contact is hung in top connection, expose on the lower contact outer wall of top connection lower port and be processed with annular groove, the built-in baffle ring of annular groove, the external diameter of baffle ring is greater than the internal diameter of top connection.
Beneficial effect: in the oil drilling construction, be lowered to simultaneously at outer tube and interior pipe, when needing to connect tubing string, use this jointing, can realize that upper tool and bottom tubing string maintain static, and only need rotate this instrument, and just can reach the tubing string purpose of connecting, attended operation is simple, quick, the processing step that tubing string is lowered to when having simplified the Multilateral Wells well cementation greatly, connect into the power height, reduced labour intensity and risk class simultaneously, saved the engineering time.
Description of drawings
Fig. 1 is the structural representation that the tubing string jointing is used in branch described in the utility model well cementation.
Among the figure: 1-top connection among the figure, 2-outer lug boss, 3-O RunddichtringO, 4-joint ring, 5-round platform, 6-lower contact.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
By shown in Figure 1, the tubing string jointing is used in this branch's well cementation, comprises top connection 1 and lower contact 6, and top connection 1 upper end is processed as female thread structure, is connected with the top tubing string, and the inwall of top connection 1 is provided with frustum cone structure 5; On the top connection inwall of frustum cone structure below 5 O RunddichtringO 3 is set, this O RunddichtringO 3 has guaranteed the sealing of jointing integral body; Described lower contact 6 lower ends are processed as external thread structure, be connected with the bottom tubing string, the top of lower contact 6 is processed with outer lug boss 2, the external diameter of outer lug boss 2 is greater than the internal diameter of round platform 5, lower contact 6 is hung in top connection 1, expose on lower contact 6 outer walls of top connection 1 lower port and be processed with annular groove, the built-in baffle ring 4 of annular groove, the external diameter of baffle ring 4 is greater than the internal diameter of top connection.
Above-mentioned round platform 5 and outer lug boss 2 actings in conjunction, constitute the lower limit of lower contact 6, the lower surface of top connection and baffle ring 4 actings in conjunction, constitute the upper limit of lower contact 6, between up and down spacing, lower contact 6 can move up and down along the top connection central axis, has realized the purpose that lower contact is stretched up and down in top connection; In addition, lower contact 6 also can rotate freely in top connection.
During site operation, after at first the bottom tubing string being gone into the well, be seated at well head with elevator, the top tubing string of slinging after then top connection 1 and upper tube male screw being connected, again with lower contact 6 aligned with lower tubing string boxes, rotation lower contact 6 just can realize and being threaded of bottom tubing string, in the tubing string connection procedure, because lower contact 6 has independent spinfunction, so need not rotate, in the lower tubular column any one, can realize the purpose that lower tubular column is threaded, lower contact 6 simultaneously also has the function that moves up and down along central axis, with bottom tubing string screwed connection the time, can guarantee that the top tubing string is motionless, only the flexible up and down of joint can compensate the length variable that causes because of last button on the lower.In addition, jointing also has sealability, satisfies needs of cementing operations.
Claims (1)
1. branch cements the well and uses the tubing string jointing, comprise top connection and lower contact, upper and lower joint is cylindric, it is characterized in that: the female thread structure that is processed with suitable for reading of described top connection, the inwall of top connection arranges frustum cone structure, on the top connection inwall below the frustum cone structure O RunddichtringO is set; The lower end of described lower contact is processed with external thread structure, the top of lower contact is processed with outer lug boss, the external diameter of outer lug boss is greater than the internal diameter of round platform, lower contact is hung in top connection, expose on the lower contact outer wall of top connection lower port and be processed with annular groove, the built-in baffle ring of annular groove, the external diameter of baffle ring is greater than the internal diameter of top connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320155962 CN203114193U (en) | 2013-04-01 | 2013-04-01 | Tubular column connecting joint for multilateral well cementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320155962 CN203114193U (en) | 2013-04-01 | 2013-04-01 | Tubular column connecting joint for multilateral well cementation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203114193U true CN203114193U (en) | 2013-08-07 |
Family
ID=48894553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320155962 Expired - Fee Related CN203114193U (en) | 2013-04-01 | 2013-04-01 | Tubular column connecting joint for multilateral well cementation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203114193U (en) |
-
2013
- 2013-04-01 CN CN 201320155962 patent/CN203114193U/en not_active Expired - Fee Related
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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: 20130807 Termination date: 20160401 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |