CN201295802Y - Drilling rod joint screw thread cold rolling device - Google Patents
Drilling rod joint screw thread cold rolling device Download PDFInfo
- Publication number
- CN201295802Y CN201295802Y CNU2008202166887U CN200820216688U CN201295802Y CN 201295802 Y CN201295802 Y CN 201295802Y CN U2008202166887 U CNU2008202166887 U CN U2008202166887U CN 200820216688 U CN200820216688 U CN 200820216688U CN 201295802 Y CN201295802 Y CN 201295802Y
- Authority
- CN
- China
- Prior art keywords
- cold rolling
- rolling device
- screw thread
- hydraulic means
- drilling rod
- 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 - Fee Related
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Abstract
The utility model relates to a screw thread cold rolling device, concretely relates to a drilling rod joint screw thread cold rolling device. The cold rolling device comprises a pinch roller (1), a spindle (2), a support (3) and a hydraulic means (4); the spindle (2) is passed through the center of the pinch roller (1) with two ends fixed on the top end of the support (3); the bottom end of the support (3) is connected with the hydraulic means (4); a pressure gauge is disposed on the hydraulic means (4); and the bottom part of the hydraulic means (4) is connected with the oil pump (6). The drilling rod joint screw thread cold rolling device in the utility model can improve the fatigue resistance and wear resistance of screw thread, and prolong the service life of drilling rod.
Description
(1) technical field
The utility model relates to a kind of screw thread cold rolling device, is specifically related to a kind of tool joint thread cold rolling device.
(2) background technology
Be threaded in the tool joint; there is the geometry of sudden change in the bottom of thread; arc transition is less; in the drilling rod military service process; the tool joint thread root exists very big stress to concentrate; under the effect of complicated alternate load, thread root usually can produce fatigue crack and cause losing efficacy and the screw thread anti-wear performance poor, cause drilling life of drill pipe short.
(3) summary of the invention
The utility model is to overcome above-mentioned deficiency, provides a kind of and can improve screw thread fatigue resistance and anti-wear performance, prolongs the tool joint thread cold rolling device of drilling life of drill pipe.
The purpose of this utility model is achieved in that a kind of tool joint thread cold rolling device, it is characterized in that described cold rolling device comprises pinch roller, mandrel, support and hydraulic means, described mandrel passes the pinch roller center, two ends are fixed on the support upper end, described support bottom links to each other with hydraulic means, described hydraulic means is provided with Pressure gauge, and described hydraulic means bottom links to each other with oil pump.
The utility model adopts pinch roller under the pressure of setting tool joint thread root circular arc place to be carried out cold pressing treatment, the assurance hardened layer is even, not only reach hardening effect but also can not destroy the thread root integrality, thereby improve screw thread fatigue resistance and anti-wear performance, prolong the service life of drilling rod.
(4) description of drawings
Fig. 1 is the utility model tool joint thread cold rolling device front view.
Fig. 2 is the utility model working state schematic representation.
Among the figure: pinch roller 1, mandrel 2, support 3, hydraulic means 4, Pressure gauge 5, oil pump 6, drilling rod 7.
(5) specific embodiment
Referring to Fig. 1, the utility model tool joint thread cold rolling device, form by pinch roller 1, mandrel 2, support 3 and hydraulic means 4, described mandrel 2 passes pinch roller 1 center, two ends are fixed on support 3 upper ends, described support 3 bottoms link to each other with hydraulic means 4, and described hydraulic means 4 is provided with Pressure gauge, and described hydraulic means 4 bottoms link to each other with oil pump 6.
Operation principle: referring to Fig. 2, after tool joint thread turning machines, the tool joint thread root is implemented cold rolling, produce hardened layer at thread root, thereby improve the fatigue strength of thread root, can reduce the generation of tool joint failure accidents.
When implementing cold rolling, require pinch roller to contact with thread root and want steadily nature, pressure will suitably be stablized, and is even to guarantee hardened layer, not only reaches hardening effect but also can not destroy the thread root integrality.Design the fluid pressure type pressue device, pressure is set convenient, guarantees constant pressure in the roll extrusion process for this reason.
Claims (1)
1, a kind of tool joint thread cold rolling device, it is characterized in that described cold rolling device comprises pinch roller (1), mandrel (2), support (3) and hydraulic means (4), described mandrel (2) passes pinch roller (1) center, two ends are fixed on support (3) upper end, described support (3) bottom links to each other with hydraulic means (4), described hydraulic means (4) is provided with Pressure gauge, and described hydraulic means (4) bottom links to each other with oil pump (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202166887U CN201295802Y (en) | 2008-11-12 | 2008-11-12 | Drilling rod joint screw thread cold rolling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202166887U CN201295802Y (en) | 2008-11-12 | 2008-11-12 | Drilling rod joint screw thread cold rolling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201295802Y true CN201295802Y (en) | 2009-08-26 |
Family
ID=41041763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202166887U Expired - Fee Related CN201295802Y (en) | 2008-11-12 | 2008-11-12 | Drilling rod joint screw thread cold rolling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201295802Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103212941A (en) * | 2013-04-28 | 2013-07-24 | 江苏曙光石油钻采设备有限公司 | Hydraulic type external thread cold rolling device |
| CN103212942A (en) * | 2013-04-28 | 2013-07-24 | 江苏曙光石油钻采设备有限公司 | Internal thread constant value cold rolling device |
| CN104492928A (en) * | 2014-10-23 | 2015-04-08 | 上海电气凯士比核电泵阀有限公司 | Mechanical rolling method and rolling device of pump shaft of main pump and machined pump shaft |
| CN104924020A (en) * | 2015-07-08 | 2015-09-23 | 河南神龙石油钻具有限公司 | Thread root part cold rolling device of petroleum drilling tool |
-
2008
- 2008-11-12 CN CNU2008202166887U patent/CN201295802Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103212941A (en) * | 2013-04-28 | 2013-07-24 | 江苏曙光石油钻采设备有限公司 | Hydraulic type external thread cold rolling device |
| CN103212942A (en) * | 2013-04-28 | 2013-07-24 | 江苏曙光石油钻采设备有限公司 | Internal thread constant value cold rolling device |
| CN104492928A (en) * | 2014-10-23 | 2015-04-08 | 上海电气凯士比核电泵阀有限公司 | Mechanical rolling method and rolling device of pump shaft of main pump and machined pump shaft |
| CN104924020A (en) * | 2015-07-08 | 2015-09-23 | 河南神龙石油钻具有限公司 | Thread root part cold rolling device of petroleum drilling tool |
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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 |
Granted publication date: 20090826 Termination date: 20171112 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |