CN203308395U - High-strength oil casing reducing screwed joint structure - Google Patents
High-strength oil casing reducing screwed joint structure Download PDFInfo
- Publication number
- CN203308395U CN203308395U CN2012203646661U CN201220364666U CN203308395U CN 203308395 U CN203308395 U CN 203308395U CN 2012203646661 U CN2012203646661 U CN 2012203646661U CN 201220364666 U CN201220364666 U CN 201220364666U CN 203308395 U CN203308395 U CN 203308395U
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- linkage section
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- petroleum casing
- diameter
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Abstract
The utility model provides a high-strength oil casing reducing screwed joint structure. A screwed joint comprises a coupling connecting section, a reducing joint body connecting section and an oil casing connecting section, wherein the pipe diameter of the coupling connecting section, the pipe diameter of the reducing joint body connecting section and the pipe diameter of the oil casing connecting section decrease sequentially. An internal thread is arranged on the coupling connecting section, and an external thread is arranged on the oil casing connecting section. The oil casing reducing screwed joint structure has the advantages that machining manufacturability is good, and joint strength is high; due to the fact that the smooth transition method is adopted in the aspect of the changes of the diameter size of the overall component, turbulence is avoided, and flow resistance is reduced; oil casings with different types and different buckling shapes can be connected due to different thread connecting designs at the two ends.
Description
Technical field
The utility model relates to the bobbin seal link, particularly to interconnective high strength petroleum casing diameter variable screw-thread joint structure between different size, different types of petroleum casing pipe.
Background technology
In the exploration and recovery process of petroleum and natural gas, sleeve pipe is one of important materials of completion.Along with the more sophisticated of geological condition and the continuous increase of well depth, traditional casing threads connects can not meet the demand in oil field fully.Sometimes due to the restriction of casing programme and for cost consideration, need to will between the petroleum casing pipe of different size, different thread type, interconnect.Its weight of pipe string be formed by connecting due to the sleeve pipe that uses identical larger format diameter is larger, considers bonding strength, may need to use the sleeve pipe of higher grade of steel, has increased simultaneously the workload of drilling well.Identical pipe string length, due to the increase of pipe string weight, the raising of tubing grade of steel and the increasing of drillng operation amount, certainly will cause the increase of drilling cost.And petroleum casing pipe connects and to preferably resolve the problems referred to above with reducer union, make to interconnect and become possibility between the petroleum casing pipe of different size, different thread type.
Summary of the invention
For solving the problem existed in above-mentioned technology, the utility model provides a kind of high strength petroleum casing diameter variable screw-thread joint structure, to adapt to interconnective needs between petroleum casing pipe.
For achieving the above object, the utility model provides a kind of high strength petroleum casing diameter variable screw-thread joint structure, it is characterized in that: this joint is that box cupling linkage section 1, reducer union body linkage section 2, the petroleum casing pipe linkage section 3 that three sections calibers reduce successively forms, described box cupling linkage section 1 is provided with internal thread, and described petroleum casing pipe linkage section 3 is provided with external screw thread.The diameter of box cupling linkage section 1 internal thread is greater than the externally threaded diameter of petroleum casing pipe linkage section 3, and the integrally-built diameter of described three sections calibers adopts rounding off.
The internal thread of described box cupling linkage section 1 is oval screw thread, and the external screw thread of described petroleum casing pipe linkage section 3 is partially trapezoidal direct linkage type screw thread.
Effect of the present utility model is the characteristics of this high strength petroleum casing diameter variable screw-thread joint structure:
1, processing technology is good, and strength of joint is large;
2, due to the variation of integrated member diameter dimension, adopt the mode of rounding off, prevented turbulent generation, subtract and cut flow resistance.
3,1,3 section different design that is threaded makes to interconnect and become possibility between different size, different buckle-shaped petroleum casing pipe.
The accompanying drawing explanation
Fig. 1 is high strength petroleum casing diameter variable screw-thread joint structure sectional drawing.
In figure: 1, box cupling linkage section 2, reducer union body linkage section 3, petroleum casing pipe linkage section
The specific embodiment
Reaching by reference to the accompanying drawings embodiment is illustrated the utility model high strength petroleum casing diameter variable screw-thread joint structure.
For realizing the purpose of this utility model, this petroleum casing pipe connects employing high strength petroleum casing diameter variable screw-thread joint structure, its structure as shown in Figure 1, this joint is that box cupling linkage section 1, reducer union body linkage section 2, the petroleum casing pipe linkage section 3 that three sections calibers reduce successively forms, described box cupling linkage section 1 is provided with internal thread, and described petroleum casing pipe linkage section 3 is provided with external screw thread.
The diameter of described box cupling linkage section 1 internal thread is greater than the externally threaded diameter of petroleum casing pipe linkage section 3, and the overall structure diameter of described three sections calibers adopts rounding off.The internal thread of described box cupling linkage section 1 is oval screw thread, and the external screw thread of described petroleum casing pipe linkage section 3 is partially trapezoidal direct linkage type screw thread.
Box cupling linkage section 1 internal thread that diameter is larger is oval screw buckle, will be connected with the male end of oval screw buckle sleeve pipe, and petroleum casing pipe linkage section 3 external screw threads that diameter is less are partially trapezoidal direct linkage type screw buckles, will be connected with the female end of partially trapezoidal straight-connecting sleeve pipe.Due in drilling well and well cementing process, after sleeve pipe connected, formed tubing string endoporus was as a liquid (drilling fluid and cement paste) circulation passage.For preventing from the generation of tubing string endoporus turbulent flow, subtract cutting flow resistance, the mode of rounding off is adopted in the variation of integrated member diameter dimension.
Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment, the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not breaking away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (2)
1. high strength petroleum casing diameter variable screw-thread joint structure, it is characterized in that: this joint is that box cupling linkage section (1), reducer union body linkage section (2), the petroleum casing pipe linkage section (3) that three sections calibers reduce successively forms, described box cupling linkage section (1) is provided with internal thread, described petroleum casing pipe linkage section (3) is provided with external screw thread, the diameter of described box cupling linkage section (1) internal thread is greater than the externally threaded diameter of petroleum casing pipe linkage section (3), and the integrally-built diameter of described three sections calibers adopts rounding off.
2. high strength petroleum casing diameter variable screw-thread joint structure according to claim 1, it is characterized in that: the internal thread of described box cupling linkage section (1) is oval screw thread, the external screw thread of described petroleum casing pipe linkage section (3) is partially trapezoidal direct linkage type screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203646661U CN203308395U (en) | 2012-07-26 | 2012-07-26 | High-strength oil casing reducing screwed joint structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203646661U CN203308395U (en) | 2012-07-26 | 2012-07-26 | High-strength oil casing reducing screwed joint structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203308395U true CN203308395U (en) | 2013-11-27 |
Family
ID=49614611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203646661U Expired - Fee Related CN203308395U (en) | 2012-07-26 | 2012-07-26 | High-strength oil casing reducing screwed joint structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203308395U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481904A (en) * | 2015-09-01 | 2017-03-08 | 李天兵 | A kind of stainless steel joint for pipeline |
| CN112856062A (en) * | 2021-01-21 | 2021-05-28 | 付宇 | Petroleum pipeline protection device and protection method |
-
2012
- 2012-07-26 CN CN2012203646661U patent/CN203308395U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481904A (en) * | 2015-09-01 | 2017-03-08 | 李天兵 | A kind of stainless steel joint for pipeline |
| CN112856062A (en) * | 2021-01-21 | 2021-05-28 | 付宇 | Petroleum pipeline protection device and protection method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131127 Termination date: 20160726 |