CN101307677B - Renewed superhigh intensity distortion-resistant abrasion-proof oil well pipe and its process - Google Patents
Renewed superhigh intensity distortion-resistant abrasion-proof oil well pipe and its process Download PDFInfo
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- CN101307677B CN101307677B CN2007100144332A CN200710014433A CN101307677B CN 101307677 B CN101307677 B CN 101307677B CN 2007100144332 A CN2007100144332 A CN 2007100144332A CN 200710014433 A CN200710014433 A CN 200710014433A CN 101307677 B CN101307677 B CN 101307677B
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Abstract
The invention relates to a refreshed oil-well pipe with ultra strength, deformation resistance and corrosion resistance and a technique for the same, belonging to the manufacturing and refreshing of an oil-well pipe in the process of oil production engineering technical field. The oil-well pipe is formed by connecting an oil-well pipe body and external upset end heads on both ends; upsetting wall-thickness external upsets on both ends of the oil-well pipe body are connected with the external upset end heads on both ends; and the surface of the oil-well pipe body is provided with a strengthening layer. The technique for the oil-well pipe makes the oil-well pipe achieve the aims of high strength, stretch resistance, pressure resistance and deformation resistance mainly through the procedures of pipe selection, cleaning, straightening, fault detection, dimensioning, leveling of an end face, pipe head upsetting, tempering in a large furnace, friction welding, finishing processing of the welded seams, tempering of the welded seams, nondestructive flaw detection of the welded seams and surface strengthening. The technique is characterized in that: after leveling of the end face, pipe end upsetting is performed by external upset of the wall thickness of parts required for welding on both ends of the oil-well pipe through forging; and the surface strengthening mean after nondestructive flaw detection of the welded seams can be performed by high-frequency quenching of the external surface or plasma quenching of the internal surface and the external surface or laser quenching of the internal surface and the external surface.
Description
Technical field
The present invention relates to a kind of multiple new superhigh intensity resistance to deformation, wear-resisting oil well pipe and technology thereof, belong to the manufacturing and the multiple new technical field of oil well pipe in the petroleum production engineering.
Background technology
When oil and gas development, existing oil well pipe bears the synergy of multiple load and different corrosive mediums at work, greatly reduces the application life of oil well pipe, and oil well pipe needs periodic replacement, each oil field changes a large amount of waste and old oil well pipes for many years, causes the serious wasting of resources.
At present, the reparation of old oil well pipe is just simply repeated to choose button, can not fundamentally improve the oil well pipe performance, time-consuming, effort, influence oil field operation.Therefore, new again old oil well pipe, make it reach certain high strength tension, resistance to compression, anti-deformation, be to make full use of idle old oil well pipe resource, reduce the important measures of oilfield exploitation cost.
Summary of the invention
The purpose of this invention is to provide a kind of multiple new superhigh intensity resistance to deformation, wear-resisting oil well pipe and technology thereof,, make old oil well pipe have excellent high strength tension, resistance to compression and anti-deformation by rational technological process.
The present invention is a kind of multiple fresh oil well casing that there is the intensive treatment layer on weld seam position intensity, surface of having strengthened.This oil well pipe is connected and composed by oil well pipe body and external upset (EU) termination, two ends, and wherein the two ends jumping-up wall thickness external upset (EU) of oil well pipe body is connected with external upset (EU) termination, two ends; The surface Hardening Treatment layer of oil well pipe body has three kinds of modes, first kind of mode is the intensive treatment layer that external surface has high-frequency quenching, the second way is the intensive treatment layer that there is plasma quenching on inside and outside surface, and the third mode is the intensive treatment layer that there is laser quenching on inside and outside surface.
Technology of the present invention mainly is by selecting pipe, cleaning, aligning, flaw detection, scale, planar end surface, tube head jumping-up, big stove tempering, friction welding, weld seam fine finishining, weld seam tempering, weld seam nondestructive inspection, surface Hardening Treatment operation to make old oil well pipe reach the purpose of high strength tension, resistance to compression, resistance to deformation.At first retired old oil well pipe is advanced line EAC successively, clean, aligning, flaw detection, scale, planar end surface, carry out the tube head jumping-up then, needing oil well pipe body two ends the welding position jumping-up to make its wall thickness external upset (EU) is 1.02～3 times of body wall thickness, integral body is carried out big stove tempering behind the tube head jumping-up, the heat affected zone that produces when eliminating the heating of old oil well pipe internal stress and tube head jumping-up, friction welding is carried out with the external upset (EU) termination again in the oil well pipe two ends after the big stove tempering, mainly pass through nondestructive inspection successively before the welding of external upset (EU) termination, the cutting thread treatment process, after finishing, oil well pipe two ends and the friction welding of external upset (EU) termination carry out weld seam fine finishining successively, the weld seam tempering, the weld seam nondestructive inspection, then qualified oil well pipe is carried out surface Hardening Treatment, surface Hardening Treatment has three kinds of modes, first kind of mode is with high-frequency quenching machine the oil well pipe external surface to be carried out high-frequency quenching, the processing depth of hardening zone is 0.05～3mm, hardness HRC20～60; The second way is with the plasma quenching lathe plasma quenching to be carried out on the inside and outside surface of oil well pipe, and the processing depth of hardening zone is 0.03～2mm, and quench-hardened case is net distribution on the inside and outside surface of oil well pipe body, hardness HRC20～60; The third mode is with laser hardening machine laser quenching to be carried out on the inside and outside surface of oil well pipe, and the processing depth of hardening zone is 0.1～2mm, hardness HRC20～60.
Employing the invention has the beneficial effects as follows:
1, multiple fresh oil well casing is owing to increased the wall thickness of friction welding position, two ends body, guaranteed the intensity of the intensity at this position greater than the oil well pipe body, thereby overcome the deadly defect of pure friction welding oil well pipe weld seam weakness, so the fracture accident of the soldering oil well casing welded seam area of can reducing friction, thereby application life of prolongation oil well pipe.
2, multiple grease hole tube-surface carries out intensive treatment, no matter be that external surface carries out high-frequency quenching, plasma quenching is carried out on inside and outside surface, still laser quenching is carried out on inside and outside surface, has all improved the oil well pipe surface strength, has prolonged the application life of oil well pipe.
Description of drawings
Fig. 1 is a process chart of the present invention.
Fig. 2 is the structural representation of the multiple fresh oil well casing of the present invention.
Among Fig. 2: 1, external upset (EU) termination, 2, weld seam, 3, the oil well pipe body.
The specific embodiment
Below in conjunction with embodiment the present invention is further described.At first retired old oil well pipe is advanced line EAC, should reject out, remaining oil well pipe is put on the purpose-built washing equipment cleans, remove surfaces externally and internally greasy dirt, dirt the oil well pipe of fracture, seriously corroded.Adopt straightener that oil well pipe is carried out straightening processing afterwards, to reach the straightness accuracy requirement.Pipe for oil well use magnetic flux leakage testing device behind the aligning is carried out integral body flaw detection, with inspection body defectiveness whether.Carry out scale, planar end surface to detecting qualified oil well pipe.Pipe for oil well use horizontal forging and upsetting machine behind the planar end surface is carried out the tube head jumping-up, need oil well pipe body two ends the welding position jumping-up to make its wall thickness thickening 1.02～3 times for the body wall thickness, two ends tube head upsetting length is 50～300mm.Then the big stove of the pipe for oil well use behind the jumping-up is carried out whole tempering, 500～650 ℃ of temperatures, temperature retention time 40～150 minutes, 20～100/h of tempering speed.To pass through nondestructive inspection, cutting thread operation before the external upset (EU) termination welding, at first the external upset end head be carried out nondestructive inspection, whether expect defectiveness, carry out cutting thread and process detecting qualified pipe material afterwards with inspection external upset (EU) termination pipe.Carry out friction welding with the oil well pipe body and the external upset (EU) termination of friction-welding machine after to tempering then, rotating speed is 950～1500rpm, friction pressure 30 * 10
6～60 * 10
6N/m
2, fraction time 10～35s, upset speed 3～10mm/s, upset retention time 10～30s, 1000～1400 ℃ of face of weld temperature, speed of welding are 40～70 terminations/h, butt welded seam jet hardening when 800～950 ℃ of face of weld temperature after friction welding is finished, spray flow 0.5～6m
3/ h.Carry out weld seam fine finishining with special equipment after oil well pipe body and the friction welding of external upset (EU) termination are finished, remove the unnecessary crimping that oil well pipe surfaces externally and internally weld seam is extruded.Oil well pipe after the butt welded seam fine finishining carries out the tempering of intermediate frequency weld seam, temperature retention time 2～6 minutes, 400～650 ℃ of heating-up temperatures.Oil well pipe after the tempering of intermediate frequency weld seam is carried out surface Hardening Treatment, surface Hardening Treatment has three kinds of modes, first kind of mode is with high-frequency quenching machine the oil well pipe external surface to be carried out high-frequency quenching, its oil well pipe speed of travel is 0.3～5m/min, the high frequency frequency is 20～50khz, jet hardening during oil well pipe to 500 to be heated～1000 ℃, spray flow 0.5～6m
3/ h, depth of hardening zone 0.05～3mm, hardness HRC20～60; The second way is with the plasma quenching lathe plasma quenching to be carried out on the inside and outside surface of oil well pipe, and the plasma arc energy density is 1000～100000w/cm
2, sweep length 0.5～30mm, inside and outside plasma gun moves axially speed 0.5～100mm/s along oil well pipe, oil well pipe rotary speed 5～150rpm, spray flow 0.5～6m
3/ h, the processing depth of hardening zone is 0.03～2mm, quench-hardened case is net distribution on the inside and outside surface of oil well pipe body, single grid table area scope 1～400mm
2, hardness HRC20～60; The third mode is with laser hardening machine laser quenching to be carried out on the inside and outside surface of oil well pipe, before the laser quenching of oil well pipe body, surfaces externally and internally will carry out melanism earlier to be handled, melanism is shone the oil well pipe surfaces externally and internally with laser beam after handling, and laser beam power density is 1500～50000w/cm
2, sweep length 0.5～30mm, inside and outside probe moves axially speed 0.5～30mm/s along oil well pipe, oil well pipe rotary speed 5～150rpm, spray flow 0.5～6m
3/ h, the processing depth of hardening zone is 0.1～2mm, hardness HRC20～60.
Claims (4)
1. the technology of a multiple new superhigh intensity resistance to deformation, wear-resisting oil well pipe, described oil well pipe is connected and composed by oil well pipe body and external upset (EU) termination, two ends, the two ends tube head jumping-up of oil well pipe body makes the wall thickness external upset (EU), with two ends external upset (EU) termination friction welding, its wall thickness thickening is 1.02～3 times of the body wall thickness, and two ends tube head upsetting length is 50～300mm; There is the intensive treatment layer on the surface of oil well pipe body, it is characterized in that: mainly by selecting pipe, cleaning, aligning, flaw detection, scale, planar end surface, tube head jumping-up, big stove tempering, friction welding, weld seam fine finishining, weld seam tempering, weld seam nondestructive inspection, surface Hardening Treatment operation, make old oil well pipe reach the purpose of high strength tension, resistance to compression, resistance to deformation, the tube head jumping-up is to make the oil well pipe two ends need welding position wall thickness external upset (EU) by forging after planar end surface; Will pass through nondestructive inspection, cutting thread operation before the welding of external upset (EU) termination, the surface Hardening Treatment mode after the weld seam nondestructive inspection is that external surface carries out high-frequency quenching or plasma quenching is carried out on inside and outside surface or laser quenching is carried out on inside and outside surface.
2. technology according to claim 1, it is characterized in that: described surface Hardening Treatment mode after the weld seam nondestructive inspection is the external surface high-frequency quenching, its oil well pipe speed of travel is 0.3～5m/min, the high frequency frequency is 20～50khz, jet hardening during oil well pipe to 500 to be heated～1000 ℃, spray flow 0.5～6m
3/ h, depth of hardening zone 0.05～3mm, hardness HRC20～60.
3. technology according to claim 1 is characterized in that: described surface Hardening Treatment mode after the weld seam nondestructive inspection is that plasma quenching is carried out on inside and outside surface, and the plasma arc energy density is 1000～100000w/cm
2, sweep length 0.5～30mm, inside and outside plasma gun moves axially speed 0.5～100mm/s along oil well pipe, oil well pipe rotary speed 5～150rpm, spray flow 0.5～6m
3/ h, quench-hardened case is net distribution on the inside and outside surface of oil well pipe body, single grid table area scope 1～400mm
2, hardened layer hardness HRC20～60.
4. technology according to claim 1 is characterized in that: described surface Hardening Treatment mode after the weld seam nondestructive inspection is that laser quenching is carried out on inside and outside surface, and laser beam power density is 1500～50000w/cm
2, sweep length 0.5～30mm, inside and outside probe moves axially speed 0.5～30mm/s along oil well pipe, oil well pipe rotary speed 5～150rpm, spray flow 0.5～6m
3/ h, the processing depth of hardening zone is 0.1～2mm, hardness HRC20～60.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100144332A CN101307677B (en) | 2007-05-15 | 2007-05-15 | Renewed superhigh intensity distortion-resistant abrasion-proof oil well pipe and its process |
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| CN2007100144332A CN101307677B (en) | 2007-05-15 | 2007-05-15 | Renewed superhigh intensity distortion-resistant abrasion-proof oil well pipe and its process |
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| CN101307677A CN101307677A (en) | 2008-11-19 |
| CN101307677B true CN101307677B (en) | 2011-04-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102912087B (en) * | 2012-09-26 | 2014-03-26 | 王硕桂 | Process for quenching surface of 20 steel pipe without flexible overlap strip by plasma arc through carburizing |
| CN106622042B (en) * | 2017-02-21 | 2022-07-29 | 淮阴工学院 | U-shaped pipe, machining device and surface machining method thereof |
| CN113020926A (en) * | 2021-03-23 | 2021-06-25 | 无锡中地钻探装备有限公司 | Drill rod production process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4629218A (en) * | 1985-01-29 | 1986-12-16 | Quality Tubing, Incorporated | Oilfield coil tubing |
| US5088638A (en) * | 1985-11-26 | 1992-02-18 | Karaev Islam K O | Method for making sucker rods |
| CN2299933Y (en) * | 1996-10-28 | 1998-12-09 | 姚元洪 | Stamping and forging welded hollow sucker rod |
| CN2430536Y (en) * | 2000-05-10 | 2001-05-16 | 胡振明 | Thick wall oil pipe |
| CN2570439Y (en) * | 2002-09-25 | 2003-09-03 | 大庆油田创业金属防腐有限公司 | Friction welding type outer heavy weight tubing |
-
2007
- 2007-05-15 CN CN2007100144332A patent/CN101307677B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4629218A (en) * | 1985-01-29 | 1986-12-16 | Quality Tubing, Incorporated | Oilfield coil tubing |
| US5088638A (en) * | 1985-11-26 | 1992-02-18 | Karaev Islam K O | Method for making sucker rods |
| CN2299933Y (en) * | 1996-10-28 | 1998-12-09 | 姚元洪 | Stamping and forging welded hollow sucker rod |
| CN2430536Y (en) * | 2000-05-10 | 2001-05-16 | 胡振明 | Thick wall oil pipe |
| CN2570439Y (en) * | 2002-09-25 | 2003-09-03 | 大庆油田创业金属防腐有限公司 | Friction welding type outer heavy weight tubing |
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| CN101307677A (en) | 2008-11-19 |
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Effective date of registration: 20090306 Address after: 560, two the Yellow River Road, Shandong, Binzhou Province, China: 256600 Applicant after: Jiuhuan Petroleum Machinery Co., Ltd., Shandong Address before: Zhuzhou Road, Laoshan District of Shandong city of Qingdao province No. 151 high tech park in building 3, Room 301 post encoding: 266000 Applicant before: Jiuhuan Machinery Corp. |
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