CN2674069Y - Actived joint for large curvature sleeve - Google Patents
Actived joint for large curvature sleeve Download PDFInfo
- Publication number
- CN2674069Y CN2674069Y CN 200420001964 CN200420001964U CN2674069Y CN 2674069 Y CN2674069 Y CN 2674069Y CN 200420001964 CN200420001964 CN 200420001964 CN 200420001964 U CN200420001964 U CN 200420001964U CN 2674069 Y CN2674069 Y CN 2674069Y
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- China
- Prior art keywords
- joint
- sleeve
- center tap
- lower contact
- utility
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- Expired - Lifetime
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Abstract
The utility model discloses an active joint for a well sleeve with large curvature, essentially comprising an upper joint (1), a middle joint (2), an O-typed sealing ring (3), and a lower joint (5); and wherein, the upper joint (1) is in screwed joint with the middle joint (2), the external diameter of one end of the lower joint (5) is spherical fitting with the inner sphere of the middle joint (2), and the lower joint (5) is directly sheathed in the middle joint (2). The utility model can be jointed at any position of the pipe series, and when the lower pipe series encounters large resistance, the joint can rotate circumferentially, so a guide shoe can rotate over the resistance position. Simultaneously, at the position with serious dog-leg or large azimuthal variation, under the situation that the sleeve reaches bend limit influenced by the rigidity, the joint can provide definite bend angle as well as increase the flexibility of a pipe column, and the probability of sleeve damage is reduced.
Description
Technical field
The utility model relates to the effective flexible joint of cover that oil-gas field development uses in the petroleum industry, and particularly a kind of deep camber casing flexible joint belongs to the downhole tool class.
Background technology
Setting of casing in the deep camber well because the lateral force between tubing string and well is bigger, causes big frictional resistance, and sleeve pipe is gone into the well difficulty.For overcoming frictional resistance, require to discharge hook load and produce the bigger power that is lowered to, the excessive power that is lowered to and frictional resistance and the bottom power interaction that acts on the tubing string bottom can cause the flexing of casing string.Simultaneously, because the influence of cover pipe stiffness, in crooked hole, casing string can produce moment of flexure along well track, and excessive moment of flexure can make sleeve pipe produce plastic strain.
Summary of the invention
The purpose of this utility model is to provide a kind of deep camber casing flexible joint, and when following pipe string was hampered greatly, this joint can circumferentially rotate, and makes guide shoe turn over the position that is hampered.While is the serious or bigger position of azimuthal variation at dog-leg, and sleeve pipe is reached under the situation of beaming limit by stiffness effect, and this joint can provide certain angle of bend, increases the flexibility of tubing string, reduces the possibility that the sleeve pipe generation destroys.
The utility model mainly is made up of top connection 1, center tap 2, " o " RunddichtringO 3, lower contact 5, it is characterized in that: top connection 1 is thread connection with center tap 2, lower contact 5 one end external diameters are spherical and match with the Internal Spherical Surface of center tap 2 that lower contact 5 directly is inserted in the center tap 2.
The utlity model has simple in structure, tensile strength is big, flexibility is big, can 360 ° swing and the characteristics that can circumferentially rotate, and can on demand a plurality of joints be connected use to increase flexibility, the latus rectum of the flexible joint of bobbin seal simultaneously can be consistent with the casing inner diameter that is connected, and can guarantee carrying out smoothly of construction in later period.
Description of drawings
Fig. 1 the utility model structural representation
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described in detail.
As shown in Figure 1, the utility model mainly is made up of top connection 1, center tap 2, " o " RunddichtringO 3, lower contact 5, it is characterized in that: top connection 1 is thread connection with center tap 2, lower contact 5 one end external diameters are spherical and match with the Internal Spherical Surface of center tap 2, lower contact 5 directly is inserted in the center tap 2, center tap 2 and lower contact 5 are to be contacted reaching circumferential 360 ° of rotations by two concentric sphericals, and realize the axial wobble of certain angle.
The utility model can be connected on any part in the pipe string, is hampered when big at pipe string down, and this joint can circumferentially rotate, and makes guide shoe turn over the position that is hampered.While is the serious or bigger position of azimuthal variation at dog-leg, and sleeve pipe is reached under the situation of beaming limit by stiffness effect, and this joint can provide certain angle of bend, increases the flexibility of tubing string, reduces the possibility that the sleeve pipe generation destroys.
Claims (3)
1, a kind of deep camber casing flexible joint, mainly form by top connection (1), center tap (2), " o " RunddichtringO (3), lower contact (5), it is characterized in that: top connection (1) is a thread connection with center tap (2), lower contact (5) one end external diameters are spherical, and match with the Internal Spherical Surface of center tap (2), lower contact (5) directly is inserted in the center tap (2).
2, deep camber casing flexible joint according to claim 1 is characterized in that: lower contact (5) is equipped with sealing ring (4) with center tap (2) cooperation place.
3, according to claim 1 or 2 described deep camber casing flexible joints, it is characterized in that: lower contact (5) has identical internal diameter with top connection (1), and identical with the casing inner diameter that is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420001964 CN2674069Y (en) | 2004-01-08 | 2004-01-08 | Actived joint for large curvature sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420001964 CN2674069Y (en) | 2004-01-08 | 2004-01-08 | Actived joint for large curvature sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2674069Y true CN2674069Y (en) | 2005-01-26 |
Family
ID=34482192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420001964 Expired - Lifetime CN2674069Y (en) | 2004-01-08 | 2004-01-08 | Actived joint for large curvature sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2674069Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643901A (en) * | 2013-12-03 | 2014-03-19 | 中国石油天然气股份有限公司 | Directional joint for well repairing and bushing removing in oil field |
| CN104594816A (en) * | 2013-11-01 | 2015-05-06 | 中国石油集团渤海钻探工程有限公司油气合作开发分公司 | Stiffness reducing anti-drag device applied to horizontal well completion pipe column |
| CN105443086A (en) * | 2014-09-25 | 2016-03-30 | 中国石油化工股份有限公司 | Connecting device for perforation gun |
-
2004
- 2004-01-08 CN CN 200420001964 patent/CN2674069Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594816A (en) * | 2013-11-01 | 2015-05-06 | 中国石油集团渤海钻探工程有限公司油气合作开发分公司 | Stiffness reducing anti-drag device applied to horizontal well completion pipe column |
| CN104594816B (en) * | 2013-11-01 | 2016-09-14 | 中国石油集团渤海钻探工程有限公司油气合作开发分公司 | A kind of firm resistance absorber of the fall applied in horizontal well completion tubular pile |
| CN103643901A (en) * | 2013-12-03 | 2014-03-19 | 中国石油天然气股份有限公司 | Directional joint for well repairing and bushing removing in oil field |
| CN103643901B (en) * | 2013-12-03 | 2016-12-07 | 中国石油天然气股份有限公司 | Oil well takes applies mechanically steering joint |
| CN105443086A (en) * | 2014-09-25 | 2016-03-30 | 中国石油化工股份有限公司 | Connecting device for perforation gun |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081212 Address after: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000 Patentee after: Western Drilling Kelamayi Drilling Technology Institute Address before: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000 Patentee before: Research Inst of Drilling Technology, Xinjiang Petroleum Administration |
|
| ASS | Succession or assignment of patent right |
Owner name: WEST DRILLING KARAMAY DRILLING CRAFT RESEARCH INST Free format text: FORMER OWNER: DRILLING WELL TECHNOLOGY INSTITUTE, PETROLEUM ADMINISTRATION BUREAU, XINJIANG Effective date: 20081212 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140108 Granted publication date: 20050126 |