CN2851511Y - Diameter-variable screwed joint structure of petroleum casing pipe - Google Patents
Diameter-variable screwed joint structure of petroleum casing pipe Download PDFInfo
- Publication number
- CN2851511Y CN2851511Y CN 200520027845 CN200520027845U CN2851511Y CN 2851511 Y CN2851511 Y CN 2851511Y CN 200520027845 CN200520027845 CN 200520027845 CN 200520027845 U CN200520027845 U CN 200520027845U CN 2851511 Y CN2851511 Y CN 2851511Y
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- CN
- China
- Prior art keywords
- petroleum casing
- casing pipe
- linkage section
- diameter
- variable
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- 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 diameter-variable threaded joint structure of a petroleum casing pipe, which is composed of a coupling joint section, a diameter-variable body joint section and a petroleum casing pipe joint section, the pipe diameters of which are orderly reduced, wherein the coupling joint section is provided with inner screws, and the petroleum casing pipe joint section is provided with outer screws. The diameter-variable threaded joint structure of a petroleum casing pipe has the characteristics of favorable processing technique property and large joint strength; because the change of the diameter dimension of integral members adopts the mode of smooth transition, the generation of turbulence can be prevented, and the flow resistance is reduced; different screw connection designs of both ends cause petroleum casing pipes with different specification and buckle shape to be mutually connected.
Description
Technical field
The utility model relates to the seal for pipe joints link, particularly to interconnective petroleum casing pipe reducing nipple structure between different size, the 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 satisfy the demand in oil field fully.Sometimes because the restriction of casing programme reaches for cost consideration, need interconnect between the petroleum casing pipe with different size, different thread type.Because it is bigger that the pipe that uses the sleeve pipe of identical big format diameter to be formed by connecting is gone here and there its weight, considers bonding strength, may need to use the sleeve pipe of higher grade of steel, increased the workload of drilling well simultaneously.Identical pipe string length is because increase, the raising of tubing grade of steel and the increasing of drillng operation amount of pipe string weight 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, and making to interconnect between the petroleum casing pipe of different size, different thread type becomes possibility.
Summary of the invention
For solving the problem that exists in the above-mentioned technology, the utility model provides a kind of petroleum casing pipe reducing nipple structure, to adapt to interconnective needs between the petroleum casing pipe.
For achieving the above object, the utility model provides a kind of petroleum casing pipe reducing nipple 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 formed, 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 petroleum casing pipe linkage section 3 externally threaded diameters, and the integrally-built diameter of described three sections calibers adopts rounding off.
The internal thread of described box cupling linkage section 1 is the TP-CQ screw thread, and the external screw thread of described petroleum casing pipe linkage section 3 is a TP-FJ direct linkage type screw thread.
Effect of the present utility model is the characteristics of this petroleum casing pipe reducing nipple structure:
1, processing technology is good, and strength of joint is big;
2, because the mode of rounding off is adopted in the variation of integrated member diameter dimension, prevented turbulent generation, subtracted and cut flow resistance.
3,1,3 section different design that is threaded is detained different size, difference and is interconnected between the petroleum casing pipe of shapes and becomes possibility.
Description of drawings
Fig. 1 uses the reducer union section of structure for petroleum casing pipe connects.
Among the figure:
1, box cupling linkage section
2, reducer union body linkage section
3, petroleum casing pipe linkage section
The specific embodiment
Reaching embodiment in conjunction with the accompanying drawings is illustrated the utility model sleeve pipe reducing nipple structure.
For realizing the purpose of this utility model, this petroleum casing pipe connects employing petroleum casing pipe reducing nipple 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 formed, 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 petroleum casing pipe linkage section 3 externally threaded diameters, and the overall structure diameter of described three sections calibers adopts rounding off.The internal thread of described box cupling linkage section 1 is the TP-CQ screw thread, and the external screw thread of described petroleum casing pipe linkage section 3 is a TP-FJ direct linkage type screw thread.
Box cupling linkage section 1 internal thread that diameter is bigger is the TP-CQ screw buckle, will be connected with the male end of TP-CQ screw buckle sleeve pipe, and less petroleum casing pipe linkage section 3 external screw threads of diameter are TP-FJ direct linkage type screw buckles, will be connected with the female end of TP-FJ direct linkage type sleeve pipe.Because in drilling well and well cementation process, sleeve pipe connects the formed tubing string endoporus in back as a liquid (drilling fluid and cement paste) circulation passage.For preventing from the generation of tubing string endoporus turbulent flow, subtract to cut flow resistance, the mode of rounding off is adopted in the variation of integrated member diameter dimension.
Claims (3)
1, a kind of petroleum casing pipe reducing nipple 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 formed, 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.
2, petroleum casing pipe reducing nipple structure according to claim 1, it is characterized in that: 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.
3, petroleum casing pipe reducing nipple structure according to claim 1, it is characterized in that: the internal thread of described box cupling linkage section (1) is the TP-CQ screw thread, the external screw thread of described petroleum casing pipe linkage section (3) is a TP-FJ direct linkage type screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520027845 CN2851511Y (en) | 2005-10-24 | 2005-10-24 | Diameter-variable screwed joint structure of petroleum casing pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520027845 CN2851511Y (en) | 2005-10-24 | 2005-10-24 | Diameter-variable screwed joint structure of petroleum casing pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2851511Y true CN2851511Y (en) | 2006-12-27 |
Family
ID=37585467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520027845 Expired - Lifetime CN2851511Y (en) | 2005-10-24 | 2005-10-24 | Diameter-variable screwed joint structure of petroleum casing pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2851511Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251749A (en) * | 2011-05-26 | 2011-11-23 | 天津钢管集团股份有限公司 | Phi 406-phi 130 large-caliper petroleum casing pipe variable-diameter joint and manufacturing method thereof |
| CN101666405B (en) * | 2009-09-30 | 2012-11-14 | 联塑科技发展(武汉)有限公司 | Connection method applicable to tubular products of different pipe diameters |
| CN106401495A (en) * | 2016-11-29 | 2017-02-15 | 无锡金顶石油管材配件制造有限公司 | Petroleum pipeline nipple assembly |
| CN110410024A (en) * | 2019-06-28 | 2019-11-05 | 中国石油天然气集团有限公司 | A kind of Varied pole piece nipple |
-
2005
- 2005-10-24 CN CN 200520027845 patent/CN2851511Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666405B (en) * | 2009-09-30 | 2012-11-14 | 联塑科技发展(武汉)有限公司 | Connection method applicable to tubular products of different pipe diameters |
| CN102251749A (en) * | 2011-05-26 | 2011-11-23 | 天津钢管集团股份有限公司 | Phi 406-phi 130 large-caliper petroleum casing pipe variable-diameter joint and manufacturing method thereof |
| CN106401495A (en) * | 2016-11-29 | 2017-02-15 | 无锡金顶石油管材配件制造有限公司 | Petroleum pipeline nipple assembly |
| CN110410024A (en) * | 2019-06-28 | 2019-11-05 | 中国石油天然气集团有限公司 | A kind of Varied pole piece nipple |
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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 OR ADDRESS: TIANJIN STEEL PIPE GROUP CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 300301 Jintang Road, Dongli District, Tianjin Patentee after: Tianjin Steel Pipe Group Co., Ltd. Address before: 300301 Jintang Road, Dongli District, Tianjin Patentee before: Tianjin Pipe (Group) Corp. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20061227 |
|
| EXPY | Termination of patent right or utility model |