CN101665860B - Laser heat treatment method of large taper screw thread of drill collar and circular bead surface - Google Patents
Laser heat treatment method of large taper screw thread of drill collar and circular bead surface Download PDFInfo
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- CN101665860B CN101665860B CN2009100755439A CN200910075543A CN101665860B CN 101665860 B CN101665860 B CN 101665860B CN 2009100755439 A CN2009100755439 A CN 2009100755439A CN 200910075543 A CN200910075543 A CN 200910075543A CN 101665860 B CN101665860 B CN 101665860B
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- drill collar
- laser beam
- screw thread
- circular bead
- taper screw
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Abstract
The invention belongs to the technical field of drill collar surface treatment and particularly relates to a laser heat treatment method of a large-taper screw thread of a drill collar and a circular bead surface, solving the problem that no favorable processing methods are available for the large taper screw thread of the drill collar and the circular bead surface so as to cause failure. The irradiating step is as follows: a laser beam irradiates one lateral surface of a taper thread form an angle that is perpendicular to the surface of the screw thread and moves along an intermediate diameter generatrix direction, and the drill collar rotates simultaneously; when the circular bead surface is treated, the laser beam turns to move along the radial direction of the drill collar to irradiate and the drill collar rotates simultaneously; and once the drill collar rotates a circle, the laser beam lifts a width of a spot. The invention has the advantages that no deformation of a series of the large taper screw threads of the drill collar and the circular bead surface thereof is caused in a normal test, improving the rigidity and the wear resistance; the surface is bright and clean without cracks, thereby reducing bonding failure; and the drill collar is convenient to disassemble smoothly in the drilling process, thereby benefiting the well drilling production of oil fields.
Description
Technical field
The invention belongs to drill collar surface-treated technical field, be specifically related to the laser heat treatment method of large taper screw thread of drill collar and circular bead surface.
Background technology
At present, slender rod type parts such as drill collar, length-to-diameter ratio L/D=50～100, the main technique flow process that adopts is usually: outer cone thread in drilling deep hole (10 meters of L ≈), turning, modifier treatment, flaw detection, the car, screw thread phosphatization and tight apart from check, finish coatings etc.By the requirement of SY/T5144, only rod member is carried out modifier treatment, do not carry out special thermal treatment.Though the drill collar steel is the special alloy structure iron that SY/T5144 requires, need smelting, rolling separately, its service condition is abominable, bears very high pulling torque and repeated stress.In the process of Shi Yonging, often because of repeated stress produces temperature arrising caused by friction, thread surface hardness is not enough, and the bonding phenomenon takes place, and causes screw thread to dismantle, and causes the inefficacy of drill collar, has a strong impact on drilling well work at the scene.
The bonding phenomenon of drill collar threads is one of modal failure mode of product.For this reason, lot of domestic and international manufacturing enterprise influences the great difficult problem that petroleum drilling is produced at this, strives to find solution route, as methods such as thread surface copper facing, steam phosphating, employing special shape screw threads, but all not yet in effect solving.
Chinese patent CN1396275A discloses the laser heat treatment method of a kind of oil pipe and connection hoop thereof, its technical scheme is the working method in 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, increase the step of institute car screw thread surface being shone with laser beam.This method can improve screw thread surface hardness and wear resistance, has reduced the thread gluing inefficacy, has prolonged the work-ing life of oil pipe and box cupling thereof.But the method for LASER HEAT TREATMENT inside and outside circle smooth surface is identical in the laser heat treatment method of this oil pipe and connection hoop thereof and the prior art, only is fit to little modulus (tapering 1: 16, the surface treatment of the screw thread of tooth height≤1.80mm).If to big modulus (tapering 1: 4,1: 6, the thread surface of tooth height 〉=3.095mm) is handled, perhaps with the scorification of tooth form top, perhaps the tooth form bottom treatment less than; Even during with the scorification of tooth form top, the hardness of tooth form bottom all is difficult to reach requirement, so causes the hardness on form of thread surface to differ greatly.
Summary of the invention
The present invention does not have good working method in order to solve existing large taper screw thread of drill collar and circular bead surface, causes the problem of inefficacy, and the laser heat treatment method of a kind of large taper screw thread of drill collar and circular bead surface is provided.
The present invention adopts following technical scheme to realize:
The laser heat treatment method of a kind of large taper screw thread of drill collar and circular bead surface, it is after bonderizing is carried out on large taper screw thread of drill collar and circular bead surface surface, with laser beam taper thread and circular bead surface surface are shone, irradiating step is: laser beam is to move with side of the vertical angular illumination taper thread of thread surface tooth form and along the middle footpath generatrix direction of taper thread, a hot spot of laser beam must cover the tooth form side, when laser beam moves, the drill collar rotation, the translational speed of laser beam is identical with the speed that screws of this taper thread, the speed of rotation of drill collar and turn to the speed that screws of drill collar threads and turn to and be complementary also is the process that screws that the irradiation process of laser beam is equivalent to laser beam and taper thread; After finishing dealing with in a side of tooth form, laser head transfers another side of oppositely handling tooth form by above-mentioned requirements to; During to circular bead surface, laser beam turns to along drill collar and moves radially irradiation drill collar rotation simultaneously, and drill collar whenever revolves and turns around, the width of a hot spot of laser beam lifting.
The present invention has following beneficial effect: be fit to the taper thread surface treatment to big modulus, the scorification of tooth form top can be able to do not handled less than the tooth form bottom yet; The hardness on form of thread surface does not have substantially and differs.Can make serial drill collar (31/8 "～11 ") large taper screw thread and shoulder plane thereof under routine inspection, not have distortion, its hardness reaches 45～65HRC, the processing layer depth is 0.05～2.5mm, the any surface finish flawless, thereby hardness and wear resistance have been improved, reduce bonding failure, made things convenient for the smooth dismounting of drill collar in the drilling process, helped the drilling well production in oil field.
Description of drawings
Fig. 1 is the be outside one's consideration laser heat treatment method synoptic diagram of screw thread and circular bead surface of drill collar auger
Fig. 2 is the partial enlarged drawing of Fig. 1
Fig. 3 is the laser heat treatment method synoptic diagram of big tapering internal thread of drill collar and circular bead surface
Fig. 4 is the partial enlarged drawing of Fig. 3
Among the figure: the 1-laser head, the 1-drill collar, the position of arrow indication is a coplanar laser illumination in addition.
Embodiment
The laser heat treatment method of a kind of large taper screw thread of drill collar and circular bead surface, it is the working method in routine, promptly to the boring of drill collar, turning, modifier treatment, flaw detection, the car taper thread, check, in the steps such as phosphatization, the step that increase is shone institute's car taper thread and circular bead surface surface with laser beam, promptly institute's car taper thread and circular bead surface surface are carried out after the bonderizing, with laser beam institute cutting thread surface is shone, its irradiating step is: laser beam is to move with side of the vertical angular illumination taper thread of thread surface tooth form and along the middle footpath generatrix direction of taper thread, when laser beam moves, the drill collar rotation, the translational speed of laser beam is identical with the speed that screws of this taper thread, the speed of rotation of drill collar and turn to the speed that screws of drill collar threads and turn to and be complementary, promptly the irradiation process of laser beam is equivalent to the process that screws of laser beam and taper thread; After finishing dealing with in a side of tooth form, laser head transfers another side of oppositely handling tooth form by above-mentioned requirements to; During to circular bead surface, laser beam turns to along drill collar and moves radially irradiation drill collar rotation simultaneously, and drill collar whenever revolves and turns around, the width of a hot spot of laser beam lifting.
The power density of laser beam is 1 * 10
3～2.5 * 10
4W/cm
2Whole process is controlled by computer, finishes automatically.
Claims (2)
1. the laser heat treatment method of large taper screw thread of drill collar and circular bead surface, it is after bonderizing is carried out on large taper screw thread of drill collar and circular bead surface surface, with laser beam large taper screw thread and circular bead surface surface are shone, it is characterized in that irradiating step is: laser beam is to move with side of the vertical angular illumination large taper screw thread of thread surface tooth form and along the middle footpath generatrix direction of large taper screw thread, a hot spot of laser beam must cover the tooth form side, when laser beam moves, the drill collar rotation, the translational speed of laser beam is identical with the speed that screws of this large taper screw thread, the speed of rotation of drill collar and turn to the speed that screws of drill collar threads and turn to and be complementary also is the process that screws that the irradiation process of laser beam is equivalent to laser beam and taper thread; After finishing dealing with in a side of tooth form, laser head transfers another side of oppositely handling tooth form by above-mentioned requirements to; During to circular bead surface, laser beam turns to along drill collar and moves radially irradiation drill collar rotation simultaneously, and drill collar whenever revolves and turns around, the width of a hot spot of laser beam lifting.
2. the laser heat treatment method of large taper screw thread of drill collar according to claim 1 and circular bead surface, the power density that it is characterized in that laser beam is 1 * 10
3～2.5 * 10
4W/cm
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100755439A CN101665860B (en) | 2009-09-24 | 2009-09-24 | Laser heat treatment method of large taper screw thread of drill collar and circular bead surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100755439A CN101665860B (en) | 2009-09-24 | 2009-09-24 | Laser heat treatment method of large taper screw thread of drill collar and circular bead surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101665860A CN101665860A (en) | 2010-03-10 |
| CN101665860B true CN101665860B (en) | 2011-01-05 |
Family
ID=41802637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100755439A Expired - Fee Related CN101665860B (en) | 2009-09-24 | 2009-09-24 | Laser heat treatment method of large taper screw thread of drill collar and circular bead surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101665860B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106282492B (en) * | 2016-11-08 | 2018-02-27 | 山西北方机械制造有限责任公司 | Drilling tool taper thread and circular bead surface laser heat treatment equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1191899A (en) * | 1997-02-25 | 1998-09-02 | 中国科学院金属研究所 | Laser surface treating technology for rotary drill bit leg journel |
| CN1396275A (en) * | 2002-08-16 | 2003-02-12 | 中国石化集团河南石油勘探局机械制造厂 | Laser heat treating technology for spiral threads of oil pipe and its connection hoop |
| CN1580296A (en) * | 2004-05-14 | 2005-02-16 | 中国第一汽车集团公司 | Laser quenching hardening treatment method for cutter and die cutting edge |
-
2009
- 2009-09-24 CN CN2009100755439A patent/CN101665860B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1191899A (en) * | 1997-02-25 | 1998-09-02 | 中国科学院金属研究所 | Laser surface treating technology for rotary drill bit leg journel |
| CN1396275A (en) * | 2002-08-16 | 2003-02-12 | 中国石化集团河南石油勘探局机械制造厂 | Laser heat treating technology for spiral threads of oil pipe and its connection hoop |
| CN1580296A (en) * | 2004-05-14 | 2005-02-16 | 中国第一汽车集团公司 | Laser quenching hardening treatment method for cutter and die cutting edge |
Non-Patent Citations (2)
| Title |
|---|
| JP昭61-79725A 1986.04.23 |
| JP特开2002-130417A 2002.05.09 |
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| Publication number | Publication date |
|---|---|
| CN101665860A (en) | 2010-03-10 |
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Granted publication date: 20110105 Termination date: 20130924 |