CN2685689Y - Special buttress thread connecting structure - Google Patents
Special buttress thread connecting structure Download PDFInfo
- Publication number
- CN2685689Y CN2685689Y CN 200420028490 CN200420028490U CN2685689Y CN 2685689 Y CN2685689 Y CN 2685689Y CN 200420028490 CN200420028490 CN 200420028490 CN 200420028490 U CN200420028490 U CN 200420028490U CN 2685689 Y CN2685689 Y CN 2685689Y
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- CN
- China
- Prior art keywords
- thread
- pipe body
- utility
- model
- buttress
- 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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- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model provides a special buttress thread connecting structure, comprising a pipe body and a coupling; wherein, the threaded joint at the end of the pipe body A is provided with an API buttress external thread whose diameter at the large end is smaller than the external diameter of the pipe body A; the coupling B is provided with an API buttress internal thread. The external thread of the threaded joint at the end of the pipe body A is a complete-thread in full-length. The large end of the external thread is provided with a withdrawing zone from 10 to 20 millimeters. The end of the coupling B is accompanied with a straight gash borehole. Since the smaller sized buttress buckle threaded joint way is operated on a heavy thick pipe body with a larger external diameter by the threaded joint and the external thread is the complete thread in full-length, the utility model can greatly improve the anti-squeezing performance of a casing without enlarging the maximum external diameter of an entire casing string, which can reduce the gauge varieties for production detection to the maximum degree; in addition, the utility model can enable the workers in an oilfield to use the pipes with a larger casing string for a smaller borehole, reducing the cost for processing and exploring.
Description
Technical field
The utility model is a threaded connector of pipeline, particularly the threaded connector of the special buttress thread linkage structure of petroleum casing pipe.
Background technique
Along with the demand in oil industry rapid development and market, the oil field also no longer is that general API standard can satisfy to the Placement of tubing.According to the needs of oil drilling, need the special buttress thread of design to connect to different being threaded.
Summary of the invention
For solving the problem that exists in the above-mentioned technology, the purpose of this utility model provides a kind of anti-crowded performance of ruining that is used to strengthen sleeve pipe, does not increase the sleeve pipe of the maximum outside diameter of whole casing string simultaneously; Processing connects than the special buttress thread of the inclined to one side ladder lock screw thread of small dimension on the body of big wall thickness, big external diameter.
For achieving the above object, technical solution of the present utility model provides a kind of special buttress thread linkage structure, comprise body and box cupling, wherein: be provided with the terraced partially outside thread of employing API at described body A end thread joint, externally threaded Outside diameter is less than the external diameter of body A; Have the terraced partially internal thread of API on the described box cupling B.
Described body A end thread joint outside thread is complete thread on total length, and the big end of outside thread place is provided with the long withdrawing district of 10mm～20mm.
Described box cupling B end has straight mouthful of bore hole.
Effect of the present utility model is to be complete thread owing to inipple adopts inclined to one side ladder lock thread connecting mode, the outside thread processed than small dimension on the body of big wall thickness, big external diameter on total length, therefore improve anti-the squeezing of sleeve pipe greatly and ruined performance, do not increased the maximum outside diameter of whole casing string simultaneously again; For product detects the kind that has reduced gauge to greatest extent,, thereby processing and the cost of exploiting have been reduced for the oil field has solved at the tubing than the big casing string of use under the slim-hole.
Description of drawings
Fig. 1 is the utility model body external thread structure schematic representation;
Fig. 2 is the utility model box cupling female thread structure schematic representation;
Fig. 3 is the utility model body and box cupling internal and external threads linkage structure schematic representation;
Fig. 4 is that the utility model body is connected part sectioned view with box cupling.
Embodiment
Reaching embodiment in conjunction with the accompanying drawings describes in detail the special buttress thread linkage structure of the utility model.
Shown in Fig. 1-4, the special buttress thread linkage structure of the utility model comprises body A and box cupling B, is provided with at body A end thread joint and adopts the terraced partially outside thread of API, and externally threaded Outside diameter has the terraced partially internal thread of API less than the external diameter of body A on the box cupling B.Body A end thread joint outside thread is complete thread 1 on total length, and the big end of outside thread place is provided with the long withdrawing district 2 of 10mm～20mm.Have the terraced partially internal thread 4 of API on the box cupling B, box cupling B end has straight mouthful of bore hole 3.
Concrete enforcement special buttress thread jointing of the present utility model can adopt following data:
The internal thread that special buttress thread connects box cupling B adopts inclined to one side acme thread, the angle that the angle of the carrying side of screw thread is 3 °, import the side is that 10 °, the pitch of screw thread are that 0.200in, the thickness of screw thread on the effective diameter of thread line are that the height of 0.100in, screw thread is that the tapering of 0.062in, screw thread is 0.0625in/in, and hoop B end has straight mouthful of bore hole of lengthening.The angle that the outside thread of body A end thread joint is same, and to adopt inclined to one side acme thread, the angle of carrying side be 3 °, import the side is that 10 °, the pitch of screw thread are that 0.200in, the thickness of screw thread on the effective diameter of thread line are that the tapering of 0.099in, screw thread is 0.0625in/in.Outside thread is complete thread on total length, and it is 10mm～20mm that 2 designs of the big end of outside thread place have withdrawing district, its length.
Claims (3)
1, a kind of special buttress thread linkage structure comprises body and box cupling, it is characterized in that: be provided with at described body A end thread joint and adopt the terraced partially outside thread of API, externally threaded Outside diameter is less than the external diameter of body A; Have the terraced partially internal thread of API on the described box cupling B.
2, special buttress thread linkage structure according to claim 1 is characterized in that: described body A end thread joint outside thread is complete thread (1) on total length, and the big end of outside thread place is provided with the long withdrawing district (2) of 10mm～20mm.
3, special buttress thread linkage structure according to claim 1 is characterized in that: described box cupling B end has straight mouthful of bore hole (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420028490 CN2685689Y (en) | 2004-03-10 | 2004-03-10 | Special buttress thread connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420028490 CN2685689Y (en) | 2004-03-10 | 2004-03-10 | Special buttress thread connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2685689Y true CN2685689Y (en) | 2005-03-16 |
Family
ID=34670255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420028490 Expired - Lifetime CN2685689Y (en) | 2004-03-10 | 2004-03-10 | Special buttress thread connecting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2685689Y (en) |
-
2004
- 2004-03-10 CN CN 200420028490 patent/CN2685689Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: TIANJIN STEEL TUBE GROUP CO., LTD. Free format text: FORMER NAME: TIANJIN PIPE CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Jintang Road, Dongli District, Tianjin, China: 300301 Patentee after: Tianjin Steel Pipe Group Co., Ltd. Address before: Jintang Road, Dongli District, Tianjin, China: 300301 Patentee before: Tianjin steel Pipe Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140310 Granted publication date: 20050316 |