CN101029352A - Drilling-rod weld heat-treatment quenching method and apparatus - Google Patents
Drilling-rod weld heat-treatment quenching method and apparatus Download PDFInfo
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- CN101029352A CN101029352A CN 200610024175 CN200610024175A CN101029352A CN 101029352 A CN101029352 A CN 101029352A CN 200610024175 CN200610024175 CN 200610024175 CN 200610024175 A CN200610024175 A CN 200610024175A CN 101029352 A CN101029352 A CN 101029352A
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Abstract
A quenching method for drilling rod weld heat treatment is carried out by spraying quenching liquid at drilling rod weld and spraying gas to internal surface of drilling rod weld. The wall thickness of weld reaches to 40mm and it has fast cooling speed, homogeneous cooling and no environmental pollution.
Description
Technical field
The present invention relates to the metal heat treatmet field, particularly drill stem welding seam thermal treatment.
Background technology
The drilling rod that is used for oil drilling is made by the API standard production.As shown in Figure 1, its structure is at drill pipe sub 4a of each butt welding of the upset end 2a at drill pipe body 1a two ends, forms weld seam 3a simultaneously.
According to the requirement of API standard, the weld seam of oil drill rocker must improve the comprehensive mechanical performance of welded seam area by modifier treatment.The modifier treatment process of drill stem welding seam comprises austenitizing, quenching and 3 processes of high tempering.Wherein quenching is an important heat treatment process.Quenching is meant steel is heated to stagnation point AC
3Or AC
1Above certain temperature obtains martensitic thermal treatment process with the speed cooling greater than critical cooling velocity after the insulation.The main purpose of quenching is to make the workpiece behind the austenitizing obtain martensite as much as possible and be equipped with the performance that the differing temps tempering obtains various needs.
For guaranteeing the mechanical property of drill stem welding seam, corresponding different drilling rod material had once been taked different quenching method.
United States Patent (USP) 3997374,4160543 has adopted the method for air quenching.United States Patent (USP) 3997374 adopts at the drill stem welding seam surfaces externally and internally and sprays the purpose that compressed-air actuated method reaches the weld seam quenching.Drill pipe body and drill pipe sub form weld seam by welding.In the weld seam appearance quench rings is arranged, the nozzle of some amount is arranged on the ring.Table has inner nozzle in weld seam, has the aperture of some amount on the inner nozzle.When needs quenched, nozzle on the quench rings and the while of the aperture on the inner nozzle were to the surfaces externally and internally jet compression air of weld seam.Because the speed of cooling of air is slower, so this method only is applicable to that this alloy content of similar 4340H is than high-hardenability oil quenching material preferably.
Be the ore resource of saves valuable, the drilling rod material gradually becomes the lower shrend material of this alloy content of similar 4130H by the higher oil quenching material of this alloy content of similar 4340H.Because the shrend drilling rod material hardening capacity of similar 4130H is low, the therefore requirement that does not reach the API standard by the air quenching Weld Performance, the necessary method that adopts other.A kind of feasible method is that only the weld seam appearance is sprayed water, and promptly cancels inner nozzle, and the nozzle on the quench rings changes water spray into by spray pressurized air.Utilize this method on the drill stem welding seam of the shrend material of similar 4130H, to obtain mechanical property preferably.
By practice, find that aforesaid method has certain limitation, be nozzle water spray be hoop or width all portion can all cover face of weld, therefore can cause weld seam to cool off inequality outward, secondly, reach drill stem welding seam more than the 25mm for wall thickness, the table not saturating phenomenon of quenching in can occurring, the final mechanical property of whole welding line that causes because the martensitic stucture of internal surface is very few descends.
Summary of the invention
The object of the present invention is to provide a kind of drilling-rod weld heat-treatment quenching method, utilize this method can solve in appearance inhomogeneous cooling that conventional drill weld seam water quenching technology exists and the heavy wall weld seam and show to quench not saturating problem, and can not cause the pollution of production line environment, can not cause weld seam internal surface hardening break yet.
For achieving the above object, technical solution of the present invention is:
A kind of drilling-rod weld heat-treatment quenching method, may further comprise the steps: the drill stem welding seam appearance spray quenching liquid behind austenitizing, simultaneously jet at inner surface of drill stem welding seam, reach the purpose that weld seam quenches with this, guarantee that when guaranteeing the weld seam through hardening weld seam does not produce quenching crack.
Described quenching liquid comprises water or water-soluble quenching medium.
Cooling back weld seam appearance temperature is between 100～400 ℃; The butt welded seam appearance is sprayed water when cooling, and speed of cooling is very big, even the shrend steel grade also may cause the quenching crack of appearance.For this reason, the appearance water spray refrigerative time is controlled to guarantee that cooled weld seam appearance temperature is between 100～400 ℃.
Carry out high tempering after the quench cooled, 550～720 ℃ of temperature ranges.According to the requirement of API standard, drill stem welding seam must carry out high tempering and reach mechanical performance index preferably after quenching.
The pressure-controlling of described quenching liquid is more than 0.1bar, and outer jetting liquid stream forms angle α with the axis direction of drill pipe body, and angle α is between 30 °～150 °.
In the pressure-controlling of the gas of inner surface of drill stem welding seam winding-up more than 0.5bar, the axis direction formation angle β of gaseous blast and drill pipe body in this, angle β is between 30 °～150 °.
Drilling-rod weld heat-treatment quenching device of the present invention comprises, body, and it is a body structure, has a main cavity; The annular water-jet is arranged in the body main cavity, and the one end is communicated in the water source body by pipe connecting, and this annular water-jet along the circumferential direction is provided with first spray orifice; Inner nozzle is arranged in the body main cavity, is arranged in the annular water-jet, and one end and the conducting of source of the gas body, it is equipped with second spray orifice along its length.
Again, the axis direction of first spray orifice on the described annular water-jet and drill pipe body forms angle α.
The axis direction of described inner nozzle second spray orifice and drill pipe body forms angle β.
Also be provided with water cavity, air cavity in the described body main cavity, correspondence is communicated in annular water-jet, inner nozzle respectively.
The pipe connecting that is communicated with annular water-jet is provided with control valve.
Also be provided with Bypass hose and control corresponding valve, this Bypass hose one end is communicated with pipe connecting, and an other end stretches in the body main cavity.
Cooling liqs sprays by the spray hole on the annular bubbler on the weld seam of drilling rod and drill pipe sub by after entering in the annular bubbler, thereby finishes the quick cooling to the drill stem welding seam appearance; Meanwhile, pressurized air is realized the quick cooling to inner surface of drill stem welding seam from the ejection of inner nozzle high speed.
Owing to adopted the outer jetting liquid of above-mentioned weld seam, the interior jet mixing type of cooling, appearance is evenly cooled off, and table through hardening in making.For the shrend material drilling rod of similar 4130H, even the weld seam wall thickness reaches more than the 25mm, also can make all through hardening of weld seam surfaces externally and internally and center, form martensite, thereby behind high tempering, can guarantee mechanical performance index preferably.
Because the jet rather than jetting liquid of table in the weld seam, hydrops can't emptying and pollute the operating environment of whole production line in the drill pipe body behind the jetting liquid in can avoiding, and also can avoid that table produces quenching crack in weld seam simultaneously.
Beneficial effect of the present invention
Compared with prior art, the present invention improves conventional drill weld seam water quenching technology.Method after the improvement can be cooled off fast to the weld metal behind the austenitizing.Facts have proved,, not only make weld seam appearance cooling evenly for the shrend drilling rod material of similar 4130H, even and the wall thickness of commissure reach 40mm, also through hardening fully.Compare with traditional method, not only cooling power increases substantially, and can not cause the pollution of production line environment, also can not cause weld seam internal surface hardening break.
Description of drawings
Fig. 1 is existing drill stem welding seam structure sectional view;
The synoptic diagram that Fig. 2 implements for the inventive method;
The cross-sectional schematic that Fig. 3 implements for the inventive method;
Fig. 4 is a drilling-rod weld heat-treatment quenching schematic representation of apparatus of the present invention;
Embodiment
Referring to Fig. 2, drilling-rod weld heat-treatment quenching method of the present invention may further comprise the steps: the drill stem welding seam appearance spray quenching liquid behind austenitizing, and quenching liquid comprises water or water-soluble quenching medium; Simultaneously jet at inner surface of drill stem welding seam, reach the purpose that weld seam quenches with this, cooling back weld seam appearance temperature is between 100～400 ℃; Guarantee that when guaranteeing the weld seam through hardening weld seam does not produce quenching crack.
Carry out high tempering after the quench cooled, 550～720 ℃ of temperature ranges.
The pressure-controlling of described quenching liquid is more than 0.1bar, and outer jetting liquid stream forms angle α with the axis direction of drill pipe body, and angle α is between 30 °～150 °.
In the pressure-controlling of the gas of inner surface of drill stem welding seam winding-up more than 0.5bar, the axis direction formation angle β of gaseous blast and drill pipe body in this, angle β is between 30 °～150 °.
As Fig. 2, shown in Figure 3, cooling liqs sprays by the spray hole on the annular bubbler on the weld seam of drilling rod 6 and drill pipe sub 7 by after entering in the annular bubbler 2, thereby finishes the quick cooling to the drill stem welding seam appearance; Meanwhile, pressurized air is realized the quick cooling to inner surface of drill stem welding seam from the ejection of inner nozzle 4 high speeds.
Referring to Fig. 3,4, drilling-rod weld heat-treatment quenching device of the present invention is used for drilling rod 6 weld seams are heat-treated quenching, it comprises, body 1, it is a body structure, has a main cavity 100, water cavity 101, air cavity 102 and corresponding water port 103, water-in 104, inlet mouth 105; Annular water-jet 2, be arranged in the body main cavity 100, and be fixed in body 1 by a fixed block 8 and fastening piece 81, these annular water-jet 2 one ends are communicated in water cavity 101 by pipe connecting 3, this annular water-jet 2 along the circumferential direction is provided with first spray orifice 21, and first spray orifice 21 on the annular water-jet 2 forms angle α with the axis direction of drill pipe body; Inner nozzle 4 is arranged in the body main cavity 100, is arranged in the annular water-jet 2, and one end and air cavity 102 conductings, it is equipped with second spray orifice 41 along its length, and this second spray orifice 41 forms angle β with the axis direction of drill pipe body; The pipe connecting 3 that is communicated with annular water-jet 2 is provided with control valve 31; Also be provided with Bypass hose 5 and control corresponding valve 51, these Bypass hose 5 one ends are communicated with pipe connecting 3, and an other end stretches in the body main cavity 100.
Water coolant can enter the water cavity 101 of spraying box by water-in 104, enter annular water-jet 2 by control valve 31 and pipe connecting 3, spray on the appearance metal at drilling rod 6 weld seam positions by first spray orifice 21 on the annular water-jet 2, realize cooling off fast with evenly of butt welded seam position outside surface.Pressurized air enters air cavity 102 by inlet mouth 105 simultaneously, enters inner nozzle 4 again, blows to the internal surface of weld metal by second spray orifice of radially leaving 41 on the inner nozzle 4, thereby realizes the auxiliary cooling of butt welded seam internal surface.
In the time need cooling off to the outside surface of steel pipe, need close the control valve 51 of Bypass hose, open pipe connecting 3 control valves 31; When not needing outside surface to steel pipe to cool off, can closed control valve 31, open control valve 51 simultaneously.At the same time under the situation of many drilling rods of thermal treatment, certain 1 station might occur does not have the situation of drilling rod, in this case, utilizing above-mentioned " double valve " control method not only to help keeping other needs the annular water-jet water yield of work constant, and can avoid high-pressure air that the water of water-jet ejection is blown out spraying box and pollutes the production operation environment.
The water of ejection is flowed in the main cavity 100 from annular water-jet 2, and flow back in the water storage tank by water port 103, thereby realizes the recycle of water coolant (or water-soluble quenching medium).
The pressurized air of ejection also diffuses automatically from the other end outflow of drilling rod 6 from inner nozzle 4 second spray orifices 41.
With Φ 127 * 9.19mm IEU S135 drilling rod is example, and its body is selected the shrend material of similar 4130H for use.Behind austenite, after using the quenching and cooling method quenching of patent of the present invention and carrying out high tempering, the yield strength of weld seam can reach about 850MPa, the full-scale ballistic work of the normal temperature of weld seam can reach about 80J, weld seam integrally stretching performance approximately is 1.6 times of body integrally stretching performance, thereby can guarantee the security of drill stem welding seam.
The present invention can directly be applied in the drilling rod production both domestic and external.Method provided by the invention not only can guarantee in the heat-treatment quenching process of cooling of shrend material drill stem welding seam of similar 4130H needed than higher speed of cooling requirement, and guarantee that steel pipe internal-surface can not produce quenching crack owing to speed of cooling is too fast, and can keep the environment of production scene clean and tidy effectively.The present invention can also be applied to the process of cooling of all pipe fitting partial heat treatments, has popularizing application prospect preferably.
Claims (12)
1. drilling-rod weld heat-treatment quenching method, may further comprise the steps: the drill stem welding seam appearance spray quenching liquid behind austenitizing, simultaneously jet at inner surface of drill stem welding seam, reach the purpose that weld seam quenches with this, guarantee that when guaranteeing the weld seam through hardening weld seam does not produce quenching crack.
2. quenching method as claimed in claim 1 is characterized in that, described quenching liquid comprises water or water-soluble quenching medium.
3. quenching method as claimed in claim 1 is characterized in that, cooling back weld seam appearance temperature is between 100～400 ℃.
4. quenching method as claimed in claim 1 is characterized in that, carries out high tempering after the quench cooled, 550～720 ℃ of temperature ranges.
5. quenching method as claimed in claim 1 is characterized in that, the pressure-controlling of described quenching liquid is more than 0.1bar, and outer jetting liquid stream forms angle α with the axis direction of drill pipe body, and angle α is between 30 °～150 °.
6. quenching method as claimed in claim 1 is characterized in that, in the pressure-controlling of the gas of inner surface of drill stem welding seam winding-up more than 0.5bar, the axis direction formation angle β of gaseous blast and drill pipe body in this, angle β is between 30 °～150 °.
7. the drilling-rod weld heat-treatment quenching device is characterized in that, comprise,
Body, it is a body structure, has a main cavity;
The annular water-jet is arranged in the body main cavity, and the one end is communicated in the water source body by pipe connecting, and this annular water-jet along the circumferential direction is provided with first spray orifice;
Inner nozzle is arranged in the body main cavity, is arranged in the annular water-jet, and one end and the conducting of source of the gas body, it is equipped with second spray orifice along its length.
8. drilling-rod weld heat-treatment quenching device as claimed in claim 7 is characterized in that, first spray orifice on the described annular water-jet and the axis direction of drill pipe body form angle α.
9. drilling-rod weld heat-treatment quenching device as claimed in claim 7 is characterized in that, the axis direction of described inner nozzle second spray orifice and drill pipe body forms angle β.
10. drilling-rod weld heat-treatment quenching device as claimed in claim 7 is characterized in that, also is provided with water cavity, air cavity in the described body main cavity, and correspondence is communicated in annular water-jet, inner nozzle respectively.
11. drilling-rod weld heat-treatment quenching device as claimed in claim 7 is characterized in that the pipe connecting that is communicated with annular water-jet is provided with control valve.
12. drilling-rod weld heat-treatment quenching device as claimed in claim 7 is characterized in that, also is provided with Bypass hose and control corresponding valve, this Bypass hose one end is communicated with pipe connecting, and an other end stretches in the body main cavity.
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| CNB2006100241751A CN100467627C (en) | 2006-02-27 | 2006-02-27 | Drilling-rod weld heat-treatment quenching method and apparatus |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988370A (en) * | 2009-07-31 | 2011-03-23 | 上海西重所重型机械成套有限公司 | Short-process flexible drill rod producing equipment and process |
| CN102373887A (en) * | 2010-08-23 | 2012-03-14 | 宝山钢铁股份有限公司 | Drill rod and manufacture method thereof |
| CN102399970A (en) * | 2011-11-18 | 2012-04-04 | 中国石油集团渤海石油装备制造有限公司 | Heat treatment method for V150 steel grade drill rod welded seam |
| CN103320586A (en) * | 2013-07-09 | 2013-09-25 | 内蒙古科技大学 | Controllable air speed and air volume quenching experiment device |
| CN104266016A (en) * | 2014-09-17 | 2015-01-07 | 平湖市当湖街道飞天人机械图文设计服务部 | Oil pipe joint of numerical control lathe and thermal treatment process thereof |
| CN105018690A (en) * | 2015-07-08 | 2015-11-04 | 江苏宇山盛佳特钢制品有限公司 | quenching and normalizing dual-purpose device |
| CN108588379A (en) * | 2018-04-24 | 2018-09-28 | 长江大学 | A kind of automation stick pipe heat treatment system |
| CN112831646A (en) * | 2021-03-18 | 2021-05-25 | 山东威玛装备科技股份有限公司 | Heat treatment process for weld joint of thin-wall drill rod |
| CN113265529A (en) * | 2019-12-18 | 2021-08-17 | 中联重科股份有限公司 | Pipe fitting inner surface quenching device and method for quenching pipe fitting inner surface |
| CN114799020A (en) * | 2022-05-27 | 2022-07-29 | 姚啸 | Automobile parts forges and beats and use processing equipment |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988370A (en) * | 2009-07-31 | 2011-03-23 | 上海西重所重型机械成套有限公司 | Short-process flexible drill rod producing equipment and process |
| CN102373887A (en) * | 2010-08-23 | 2012-03-14 | 宝山钢铁股份有限公司 | Drill rod and manufacture method thereof |
| CN102399970A (en) * | 2011-11-18 | 2012-04-04 | 中国石油集团渤海石油装备制造有限公司 | Heat treatment method for V150 steel grade drill rod welded seam |
| CN102399970B (en) * | 2011-11-18 | 2014-02-05 | 中国石油集团渤海石油装备制造有限公司 | Heat treatment method for V150 steel grade drill rod welded seam |
| CN103320586A (en) * | 2013-07-09 | 2013-09-25 | 内蒙古科技大学 | Controllable air speed and air volume quenching experiment device |
| CN104266016A (en) * | 2014-09-17 | 2015-01-07 | 平湖市当湖街道飞天人机械图文设计服务部 | Oil pipe joint of numerical control lathe and thermal treatment process thereof |
| CN105018690A (en) * | 2015-07-08 | 2015-11-04 | 江苏宇山盛佳特钢制品有限公司 | quenching and normalizing dual-purpose device |
| CN108588379A (en) * | 2018-04-24 | 2018-09-28 | 长江大学 | A kind of automation stick pipe heat treatment system |
| CN113265529A (en) * | 2019-12-18 | 2021-08-17 | 中联重科股份有限公司 | Pipe fitting inner surface quenching device and method for quenching pipe fitting inner surface |
| CN113265529B (en) * | 2019-12-18 | 2022-01-25 | 中联重科股份有限公司 | Pipe fitting inner surface quenching device and method for quenching pipe fitting inner surface |
| CN112831646A (en) * | 2021-03-18 | 2021-05-25 | 山东威玛装备科技股份有限公司 | Heat treatment process for weld joint of thin-wall drill rod |
| CN114799020A (en) * | 2022-05-27 | 2022-07-29 | 姚啸 | Automobile parts forges and beats and use processing equipment |
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| CN100467627C (en) | 2009-03-11 |
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