CN101653813B - Internal-external thickening mould at tube ends of drill stem tube body - Google Patents
Internal-external thickening mould at tube ends of drill stem tube body Download PDFInfo
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- CN101653813B CN101653813B CN2009100345010A CN200910034501A CN101653813B CN 101653813 B CN101653813 B CN 101653813B CN 2009100345010 A CN2009100345010 A CN 2009100345010A CN 200910034501 A CN200910034501 A CN 200910034501A CN 101653813 B CN101653813 B CN 101653813B
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- drill stem
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- 230000008719 thickening Effects 0.000 title claims abstract description 28
- 230000007704 transition Effects 0.000 abstract description 12
- 238000005553 drilling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention relates to an internal-external thickening mould at tube ends of a drill stem tube body, comprising an external model (1) and a core model (2). The internal-external thickening mould is characterized in that the core model (2) consists of a split-type internal model (2.2) and a core model head (2.1); the core model head (2.1) takes a boss shape, and a through hole is arranged on the core model head (2.1) along the axial core direction; and the main body of the internal model (2.2) takes a frustum shape, the table board with smaller radius of the main body of the internal model is provided with a connecting rod (2.2.1) which can pass through the through hole on the core model head (2.1). The drill stem tube body produced by utilizing the internal-external thickening mould at tube ends of the drill stem tube body has long thickening transition zone and smooth and natural internal surface.
Description
(1) technical field
The present invention relates to a kind of internal-external thickening mould at tube ends of drill stem tube body.
(2) background technology
Drill pipe body and joint butt welding need be thickeied the drill pipe body pipe end, and the thickening form has three kinds of interior thickening, external upset (EU) and internal-external thickenings, and wherein internal-external thickening is to use morely, also is the bigger a kind of thickening mode of difficulty.Because drilling rod is to be on active service under complex dielectrics and complicated alternate load, the fatigue rupture of drill pipe thickening district is the principal mode that drilling rod lost efficacy, and requires the drill pipe body addition thick transition area to want smooth natural and want long enough for this reason.
The basic technology of drill pipe body end upsetting is to forge, and pipe end heating, forging and pressing (as Fig. 2) between external mold and core are according to three heating of needs of thickening size, three thickenings or four heating, four thickenings.In the thickening process since the fluctuation of inhomogeneous, the heating-up temperature difference of body wall thickness or upset force all can cause in addition thick transition area wave fold appears, this also is the principal mode that defective work appears in the drill pipe body end upsetting.
(3) summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, provide a kind of interior addition thick transition area of drill pipe body that can make long, the smooth natural internal-external thickening mould at tube ends of drill stem tube body of inner surface.
The object of the present invention is achieved like this: a kind of internal-external thickening mould at tube ends of drill stem tube body, and it comprises external mold and core, it is characterized in that: described core is made up of split type internal mold and core head;
Described core head is boss shape, and described core head upper edge shaft core direction is provided with through hole;
Described internal mold main body is taper type, and the less table top of its radius is provided with connecting rod, and described extension bar can pass from the through hole on the core head.
Internal-external thickening mould at tube ends of drill stem tube body of the present invention is provided with internal mold at interior addition thick transition area position when thickening the last time and is shaped with addition thick transition area in controlling or revising, and make the smooth nature of inner surface, and internal mold can take out conveniently after thickening is finished.The tapering of internal mold can be set according to the length of interior addition thick transition area needs, and the interior addition thick transition area of processing is long.
(4) description of drawings
Fig. 1 is an internal-external thickening mould at tube ends of drill stem tube body structural representation of the present invention.
Fig. 2 is former internal-external thickening mould at tube ends of drill stem tube body structural representation.
Among the figure:
Core head 2.1, internal mold 2.2, connecting rod 2.2.1,
Body 3.1, transition region 3.2, pipe end 3.3.
(5) specific embodiment
Referring to Fig. 1, the internal-external thickening mould at tube ends of drill stem tube body that the present invention relates to mainly is made up of external mold 1 and core 2, and described core 2 is made up of split type internal mold 2.2 and core head 2.1;
Described core head 2.1 is boss shape, and described core head 2.1 upper edge shaft core directions are provided with through hole;
Described internal mold 2.2 is for main body is taper type, and the less table top of its radius is provided with connecting rod 2.2.1, and described extension bar 2.2.1 can pass from the through hole on the core head 2.1.
In the drill pipe body end upsetting process, at interior addition thick transition area 3.3 positions internal mold 2.2 is set when thickening the last time and is shaped, make the smooth nature of inner surface with addition thick transition area in controlling or revising.Internal mold can conveniently take out after thickening is finished.The tapering of internal mold can be set according to the length of interior addition thick transition area needs, simple and convenient.
Claims (1)
1. internal-external thickening mould at tube ends of drill stem tube body, it comprises external mold (1) and core (2), it is characterized in that: described core (2) is made up of split type internal mold (2.2) and core head (2.1);
Described core head (2.1) is boss shape, and described core head (2.1) upper edge shaft core direction is provided with through hole;
Described internal mold (2.2) main body is taper type, and the less table top of its radius is provided with connecting rod (2.2.1), and described connecting rod (2.2.1) can pass from the through hole on the core head (2.1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100345010A CN101653813B (en) | 2009-08-31 | 2009-08-31 | Internal-external thickening mould at tube ends of drill stem tube body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100345010A CN101653813B (en) | 2009-08-31 | 2009-08-31 | Internal-external thickening mould at tube ends of drill stem tube body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101653813A CN101653813A (en) | 2010-02-24 |
| CN101653813B true CN101653813B (en) | 2010-12-08 |
Family
ID=41708388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100345010A Expired - Fee Related CN101653813B (en) | 2009-08-31 | 2009-08-31 | Internal-external thickening mould at tube ends of drill stem tube body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101653813B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439011B (en) * | 2014-12-30 | 2016-05-25 | 上海工程技术大学 | A kind of oil drill rocker upset end forming terrace die and application thereof |
| CN108817293B (en) * | 2018-08-09 | 2024-07-05 | 湖北五环欧科制造技术有限公司 | Forging tool and process for upsetting two ends of thin-walled tube |
| CN109127912A (en) * | 2018-09-30 | 2019-01-04 | 山西风雷钻具有限公司 | A kind of device thickening 5 cun of oil drill rocker pipe ends |
| WO2021186386A1 (en) * | 2020-03-18 | 2021-09-23 | Tata Steel Limited | A mandrel assembly for thickening brim portions in an inner surface of a tube |
-
2009
- 2009-08-31 CN CN2009100345010A patent/CN101653813B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101653813A (en) | 2010-02-24 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20101208 Termination date: 20180831 |