CN1213155C - Laser heat treating technology for spiral threads of oil pipe and its connection hoop - Google Patents
Laser heat treating technology for spiral threads of oil pipe and its connection hoop Download PDFInfo
- Publication number
- CN1213155C CN1213155C CN 02125747 CN02125747A CN1213155C CN 1213155 C CN1213155 C CN 1213155C CN 02125747 CN02125747 CN 02125747 CN 02125747 A CN02125747 A CN 02125747A CN 1213155 C CN1213155 C CN 1213155C
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- CN
- China
- Prior art keywords
- screw thread
- oil pipe
- laser beam
- institute
- oil
- 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 present invention relates to an oil pipe used for oil development and a laser heat treatment method of a coupling screw thread thereof, which belongs to the processing field of a metal rod pipe used for oil development. The present invention has the technical scheme that in a conventional processing method, namely in the steps to the oil pipe body and the coupling thereof, such as turning a screw thread (thread processing), test, marking, pressure test, etc., a step for irradiating the surface of the turned screw thread by a laser beam is increased. The adopted technical scheme can cause the screw thread to keep no deformation at routine examination, the hardness can achieve 25 to 67HRC, the microhardness is 255 to 923HV, and the processing layer depth is 0.05 to 1.5mm. The screw thread has smooth surface and no crack. Thereby, the present invention enhances the hardness and the abrasion resistance, reduces the thread gluing failure and prolongs the service life of the oil pipe and the coupling thereof, and is favorable to the development production of crude oil.
Description
One, technical field
The present invention relates to the laser heat treatment method of a kind of oil development, belong to the manufacture field of oil development with the metal rod tube with oil pipe and connection hoop thereof.
Two, background technology
At present, the processing of this class oil pipe and connection hoop thereof, the main technique step that adopts is usually, the assist measures such as check, mark and protection before and after car screw thread and the car screw thread thereof do not carry out special thermal treatment to material.Though oil pipe and box cupling thereof will be got well with material with the relative general industry of material, even import oil pipe material is organized fine and close relatively, but oil pipe practical application working conditions is abominable, stressed big, remove at the scene in the operating process of oil pipe, often because of the rotating speed height, moment of torsion is big, unload on the screw thread and just cause wearing and tearing several times, failure phenomenons such as thread gluing occur, thereby influence crude production.
The thread gluing phenomenon of oil pipe and box cupling thereof is the modal failure mode of tubing product, U.S. API standard also only the regulation on unload be for 6 times qualified.For this reason, lot of domestic and international experts and scholars influence the great difficult problem that oil development is produced at this, strive to find solution route, as improve screw thread smooth finish, change the screw thread shape, be coated with thread compound, box cupling internal surface phosphatization, copper facing, processing method such as zinc-plated, but all fundamentally do not solve.
Three, summary of the invention
The object of the present invention is to provide and a kind ofly can improve oil pipe and connection hoop surface strength thereof, reduce the oil pipe that thread gluing lost efficacy and the laser heat treatment method of connection hoop thereof.
For realizing that the technical scheme that order of the present invention is taked is: in the working method of routine, promptly oil pipe body and box cupling thereof are carried out in the steps such as car screw thread (screw thread processing), check, mark, pressure testing, the step that increase is shone institute car screw thread surface with laser beam, promptly institute car screw thread surface being carried out after melanism handles, is 6 * 10 with power density
3～4 * 10
4W/cm
2Laser beam institute car screw thread surface is shone, and laser beam is 1.5～10mm to the sweep length on screw thread surface, laser beam is 2.5～16.5mm/s along the oil pipe body or the axial translational speed of box cupling of institute's car screw thread.Simultaneously, when laser beam irradiation, the oil pipe body of institute's car screw thread or the speed of rotation of box cupling are 10～100r/min.
By adopting technical scheme provided by the present invention, can make screw thread under routine inspection, not have distortion, its hardness reaches 25～67HRC, microhardness 255～923HV, the processing layer depth is 0.05～1.5mm, any surface finish flawless, thereby hardness and wear resistance have been improved, reduced the thread gluing inefficacy, prolonged the work-ing life of oil pipe and box cupling thereof, the Development and Production of favourable crude oil.
Four, embodiment
Working method routinely, body and box cupling to last machining line are detected a flaw to guarantee that its material meets the requirements, going out qualified screw thread at oil pipe two ends outside surface and box cupling internal surface car respectively then, and institute's car screw thread is carried out melanism handle, is 6 * 10 with power density then
3～4 * 10
4W/cm
2CO
2Laser beam shines institute car screw thread surface, and laser beam is 1.5～10mm to the sweep length on screw thread surface, and laser beam is 2.5～16.5mm/s along the oil pipe body or the axial translational speed of box cupling of institute's car screw thread.Simultaneously, when laser beam irradiation, the oil pipe body of institute's car screw thread or the speed of rotation of box cupling are 10～100r/min.After this screw thread is handled, carry out steps such as the protection of screw thread fat liquoring, oil pipe and collar mark, pressure testing, anticorrosion, packing, promptly finish the processing of oil pipe and box cupling.
Claims (3)
1, the laser heat treatment method of a kind of oil pipe and connection hoop thereof, comprise oil pipe body and box cupling thereof are carried out car screw thread, check, mark and pressure testing step, it is characterized in that: after the car screw thread, the step that increase is shone institute car screw thread surface with laser beam, the power density of described laser beam is 6 * 10
3～4 * 10
4W/cm
2, laser beam is 1.5～10mm to the sweep length of institute's car screw thread, laser beam is 2.5～16.5mm/s along the oil pipe body or the axial translational speed of box cupling of institute's car screw thread.
2, the laser heat treatment method of oil pipe according to claim 1 and connection hoop thereof is characterized in that: before laser beam shines institute car screw thread surface, melanism is carried out on institute car screw thread surface handle.
3, the laser heat treatment method of oil pipe according to claim 1 and 2 and connection hoop thereof is characterized in that: during laser beam irradiation, the oil pipe body of institute's car screw thread or the speed of rotation of box cupling are 10～100r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02125747 CN1213155C (en) | 2002-08-16 | 2002-08-16 | Laser heat treating technology for spiral threads of oil pipe and its connection hoop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02125747 CN1213155C (en) | 2002-08-16 | 2002-08-16 | Laser heat treating technology for spiral threads of oil pipe and its connection hoop |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1396275A CN1396275A (en) | 2003-02-12 |
| CN1213155C true CN1213155C (en) | 2005-08-03 |
Family
ID=4745654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02125747 Expired - Fee Related CN1213155C (en) | 2002-08-16 | 2002-08-16 | Laser heat treating technology for spiral threads of oil pipe and its connection hoop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1213155C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325747C (en) * | 2005-08-02 | 2007-07-11 | 河北华北石油荣盛机械制造有限公司 | Surface treatment method of internal thread of stainless steel oil pipe collar |
| CN101665860B (en) * | 2009-09-24 | 2011-01-05 | 山西北方风雷工业集团有限公司 | Laser heat treatment method of large taper screw thread of drill collar and circular bead surface |
| CN104388637A (en) * | 2014-10-17 | 2015-03-04 | 无锡英普林纳米科技有限公司 | Method for induction heating on threaded surface of oil casing collar |
| CN104264106A (en) * | 2014-10-17 | 2015-01-07 | 无锡英普林纳米科技有限公司 | Method for generating chemical element co-permeation layer on surface of screw thread of petroleum casing coupling |
| RU2624274C2 (en) * | 2015-11-17 | 2017-07-03 | Акционерное общество "Центральное конструкторское бюро морской техники "Рубин" | Processing method of titanium alloys drill pipes threaded joint |
| CN108942260A (en) * | 2018-08-07 | 2018-12-07 | 北京京诚之星科技开发有限公司 | A kind of steel tube coupling process equipment |
-
2002
- 2002-08-16 CN CN 02125747 patent/CN1213155C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1396275A (en) | 2003-02-12 |
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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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050803 Termination date: 20130816 |