CN102399970A - Heat treatment method for V150 steel grade drill rod welded seam - Google Patents
Heat treatment method for V150 steel grade drill rod welded seam Download PDFInfo
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Abstract
The invention discloses a heat treatment method for a V150 steel grade drill rod welded seam. The method comprises quenching and tempering, wherein the quenching comprises the following steps of: a, conveying the drill rod welded seam to the position of a quenching coil; b, heating the welded seam to the temperature of between 950 and 975 DEG C in 30 to 40 seconds, and preserving heat for 28 to 32 seconds; and c, quenching the outer surface of the welded seam by adopting a quenching liquid, and quenching the inner surface of the welded seam by adopting high-pressure air, wherein the quenching time is 110 to 130 seconds; and the tempering comprises the following steps of: a, conveying the quenched drill rod welded seam to the position of a tempering coil; and b, heating the welded seam to the temperature of between 670 and 695 DEG C in 35 to 45 seconds, preserving heat for 170 to 190 seconds, and cooling the welded seam to room temperature. The obtained drill rod welded seam has the yield strength of more than or equal to 827MPa, the tensile strength of more than or equal to 900MPa, the elongation of more than or equal to 13 percent, and the impact power at the temperature of 20 DEG C below zero of not less than 54J, which exceed the V150 steel grade standard values by over 30 percent; and the grain size of the welded seam structure reaches grade 8 or higher, and the one-time qualification rate of the product is high.
Description
Technical field
The present invention relates to the heat treating method of drill stem welding seam, especially a kind of heat treating method of V150 steel grade drill pipe weld seam.
Background technology
Oil drill rocker is the main tool of oil drilling, comprises the drill pipe sub at drill pipe body and drill pipe body two ends in the structure.In the exploitation and extractive process of oil gas, require drill pipe body must be able to bear huge interior external pressure, distortion, bending and vibration.
Along with the continuous development of petroleum industry, increasing deep-well, ultra deep well are developed, and this has just proposed increasingly high requirement to drilling rod.USP 3997374,4160543 has adopted the method for air quenching; USP 3997374 is employed in the drill stem welding seam surfaces externally and internally and sprays the purpose that compressed-air actuated method reaches the weld seam quenching; 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; Chinese patent 200610024175.1 discloses a kind of drilling-rod weld heat-treatment quenching method; Drill stem welding seam surface spray quenching liquid behind austenitizing; Simultaneously jet at inner surface of drill stem welding seam, reach the purpose that weld seam quenches with this, but do not disclose concrete quenching temperature and cool time and other parameter; Just provided a kind of quenching mode; And weld seam appearance temperature after the given quench cooled and follow-up tempering range are bigger, do not point out that the drill pipe sub grade of steel is 130Ksi, and the drill pipe body grade of steel is that the weld seam of 150Ksi quenches and the required actual temp of tempering; The disclosed weld seam thermal treatment process of above-mentioned patent all can not reach the requirement of V150 grade of steel.
Summary of the invention
The technical problem that the present invention will solve provides a kind of heat treating method of V150 steel grade drill pipe weld seam; Drill stem welding seam thermal treatment process provided by the invention is that the drill pipe sub grade of steel is 130Ksi; The drill pipe body grade of steel is the thermal treatment process of the weld seam of 150Ksi, the ys of the drill stem welding seam that obtains, tensile strength, unit elongation and-20
0Average ballistic work under the C condition all can reach the requirement of V150 grade of steel.
The technical scheme that the present invention taked is the heat treating method of V150 steel grade drill pipe weld seam, comprises quenching, tempering, and drill stem welding seam is formed through friction welding by drill pipe sub and drill pipe body, and the drill pipe sub grade of steel is 130Ksi, and the drill pipe body grade of steel is 150Ksi;
Quenching may further comprise the steps:
A, drill stem welding seam is transported to the quenching coil position;
B, 30～40 seconds times spent are heated to 950 ℃～975 ℃ with weld seam, and are incubated 28～32 seconds;
C, face of weld adopt hardening liquid to quench, and internal surface adopts compressed air quenching, and the cool time is 110～130 seconds, and the flow of hardening liquid is 270～290m
3/ min, compressed-air actuated top hole pressure is controlled at more than the 0.5Mpa;
Tempering may further comprise the steps:
A, the drill stem welding seam after will quenching are transported to the tempering coil position;
B, 35～45 seconds times spent are heated to 670～695 ℃ with weld seam, are incubated after 170～190 seconds, naturally cool to room temperature.
Among the preferred quenching step b weld seam is heated to 960 ℃; Among the tempering step b weld seam is heated to 680 ℃.
Preferred quenching step b finishes to begin to quench within back 6 seconds step c.
Preferred hardening liquid is contrary type hardening liquid UCON-E of dissolving of water, Tao Shi or the contrary type hardening liquid UCON-A of dissolving of Tao Shi.
Usefulness of the present invention is: adopt drill stem welding seam heat treating method of the present invention, the ys>=827MPa of the V150 steel grade drill pipe weld seam that obtains, tensile strength>=900MPa, unit elongation>=13% ,-20
0Average ballistic work under the C condition is not less than 54J, exceeds more than 30% than V150 grade of steel standard value; The seam organization grain fineness number reaches more than 8 grades or 8 grades, and the first-time qualification rate of the drill stem welding seam after the thermal treatment reaches more than 99.7%.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
Fig. 1 organizes grain fineness number figure for the weld seam after embodiment 1 thermal treatment;
Fig. 2 organizes grain fineness number figure for the weld seam after embodiment 2 thermal treatments;
Fig. 3 organizes grain fineness number figure for the weld seam after embodiment 3 thermal treatments;
Above-mentioned picture amplification multiple is identical.
Embodiment
Embodiment 1
The heat treating method of V150 steel grade drill pipe weld seam comprises quenching, tempering, and drill stem welding seam is formed through friction welding by drill pipe sub and drill pipe body, and the drill pipe sub grade of steel is 130Ksi, and the drill pipe body grade of steel is 150Ksi;
Quenching may further comprise the steps:
A, drill stem welding seam is transported to the quenching coil position;
B, 35 seconds times spent are heated to 960 ℃ with weld seam, and are incubated 30 seconds;
C, face of weld adopt hardening liquid to quench, and hardening liquid is the contrary type hardening liquid UCON-E of dissolving of Tao Shi, and internal surface adopts compressed air quenching, and the cool time is 120 seconds, and the flow of hardening liquid is 280m
3/ min, compressed-air actuated top hole pressure is controlled at 0.5Mpa;
Tempering may further comprise the steps:
A, the drill stem welding seam after will quenching are transported to the tempering coil position;
B, 40 seconds times spent are heated to 680 ℃ with weld seam, are incubated after 180 seconds, naturally cool to room temperature.
Quenching step b finishes to begin to quench within back 6 seconds step c.
The ys of drill stem welding seam is 860MPa, and tensile strength is 950MPa, and unit elongation is 14% ,-20
0Ballistic work under the C condition is 65J, and the seam organization grain fineness number is 10.5 grades.
Embodiment 2
The heat treating method of V150 steel grade drill pipe weld seam comprises quenching, tempering, and drill stem welding seam is formed through friction welding by drill pipe sub and drill pipe body, and the drill pipe sub grade of steel is 130Ksi, and the drill pipe body grade of steel is 150Ksi;
Quenching may further comprise the steps:
A, drill stem welding seam is transported to the quenching coil position;
B, 30 seconds times spent are heated to 950 ℃ with weld seam, and are incubated 28 seconds;
C, face of weld adopt hardening liquid to quench, and hardening liquid is the contrary type hardening liquid UCON-E of dissolving of Tao Shi, and internal surface adopts compressed air quenching, and the cool time is 110 seconds, and the flow of hardening liquid is 270m
3/ min, compressed-air actuated top hole pressure is controlled at 0.6Mpa;
Tempering may further comprise the steps:
A, the drill stem welding seam after will quenching are transported to the tempering coil position;
B, 35 seconds times spent are heated to 670 ℃ with weld seam, are incubated after 170 seconds, naturally cool to room temperature.
Quenching step b finishes to begin to quench within back 6 seconds step c.
The ys of drill stem welding seam is 850MPa, and tensile strength is 930MPa, and unit elongation is 15% ,-20
0Ballistic work under the C condition is 68J, and the seam organization grain fineness number is 10 grades.
Embodiment 3
The heat treating method of V150 steel grade drill pipe weld seam comprises quenching, tempering, and drill stem welding seam is formed through friction welding by drill pipe sub and drill pipe body, and the drill pipe sub grade of steel is 130Ksi, and the drill pipe body grade of steel is 150Ksi;
Quenching may further comprise the steps:
A, drill stem welding seam is transported to the quenching coil position;
B, 40 seconds times spent are heated to 975 ℃ with weld seam, and are incubated 32 seconds;
C, face of weld adopt hardening liquid to quench, and hardening liquid is the contrary type hardening liquid UCON-A of dissolving of Tao Shi, and internal surface adopts compressed air quenching, and the cool time is 130 seconds, and the flow of hardening liquid is 290m
3/ min, compressed-air actuated top hole pressure is controlled at 0.8Mpa;
Tempering may further comprise the steps:
A, the drill stem welding seam after will quenching are transported to the tempering coil position;
B, 45 seconds times spent are heated to 695 ℃ with weld seam, are incubated after 190 seconds, naturally cool to room temperature.
Quenching step b finishes to begin to quench within back 6 seconds step c.
The ys of drill stem welding seam is 870MPa, and tensile strength is 980MPa, and unit elongation is 14% ,-20
0Ballistic work under the C condition is 60J, and organizing grain fineness number is 11 grades.
Embodiment 4
The heat treating method of V150 steel grade drill pipe weld seam comprises quenching, tempering, and drill stem welding seam is formed through friction welding by drill pipe sub and drill pipe body, and the drill pipe sub grade of steel is 130Ksi, and the drill pipe body grade of steel is 150Ksi;
Quenching may further comprise the steps:
A, drill stem welding seam is transported to the quenching coil position;
B, 30 seconds times spent are heated to 950 ℃ with weld seam, and are incubated 28 seconds;
C, face of weld adopt hardening liquid to quench, and hardening liquid is a water, and internal surface adopts compressed air quenching, and the cool time is 110 seconds, and the flow of hardening liquid is 270m
3/ min, compressed-air actuated top hole pressure is controlled at 0.6Mpa;
Tempering may further comprise the steps:
A, the drill stem welding seam after will quenching are transported to the tempering coil position;
B, 35 seconds times spent are heated to 670 ℃ with weld seam, are incubated after 170 seconds, naturally cool to room temperature.
Quenching step b finishes to begin to quench within back 6 seconds step c.
The ys of drill stem welding seam is 845MPa, and tensile strength is 910MPa, and unit elongation is 18% ,-20
0Ballistic work under the C condition is 60J, and organizing grain fineness number is 10 grades.
Claims (4)
1.V150 the heat treating method of steel grade drill pipe weld seam comprises quenching, tempering, said drill stem welding seam is formed through friction welding by drill pipe sub and drill pipe body, it is characterized in that: the drill pipe sub grade of steel is 130Ksi, and the drill pipe body grade of steel is 150Ksi;
Quenching may further comprise the steps:
A, drill stem welding seam is transported to the quenching coil position;
B, 30～40 seconds times spent are heated to 950 ℃～975 ℃ with weld seam, and are incubated 28～32 seconds;
C, face of weld adopt hardening liquid to quench, and internal surface adopts compressed air quenching, and the cool time is 110～130 seconds, and the flow of hardening liquid is 270～290m
3/ min, compressed-air actuated top hole pressure is controlled at more than the 0.5Mpa;
Tempering may further comprise the steps:
A, the drill stem welding seam after will quenching are transported to the tempering coil position;
B, 35～45 seconds times spent are heated to 670～695 ℃ with weld seam, are incubated after 170～190 seconds, naturally cool to room temperature.
2. the heat treating method of V150 steel grade drill pipe weld seam as claimed in claim 1 is characterized in that among the said quenching step b weld seam being heated to 960 ℃; Among the tempering step b weld seam is heated to 680 ℃.
3. the heat treating method of V150 steel grade drill pipe weld seam as claimed in claim 2, the step b that it is characterized in that quenching finish to begin to quench within back 6 seconds step c.
4. the heat treating method of V150 steel grade drill pipe weld seam as claimed in claim 3 is characterized in that hardening liquid is contrary type hardening liquid UCON-E of dissolving of water, Tao Shi or the contrary type hardening liquid UCON-A of dissolving of Tao Shi.
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Cited By (6)
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| CN103014306A (en) * | 2012-12-14 | 2013-04-03 | 中国石油集团长城钻探工程有限公司工程服务公司 | Novel heat treatment process of drilling rod welding line of bainite/martensite mixed steel material |
| WO2014169592A1 (en) * | 2013-04-19 | 2014-10-23 | 宝山钢铁股份有限公司 | Manufacturing method for super 13cr friction-welded drill rod |
| CN105803162A (en) * | 2016-06-08 | 2016-07-27 | 中国石油集团渤海石油装备制造有限公司 | 165-steel-grade drill rod weld joint heat treatment method |
| CN113106203A (en) * | 2021-03-18 | 2021-07-13 | 山东威玛装备科技股份有限公司 | Thick-wall drill rod friction welding seam layered heat treatment process |
| CN113667814A (en) * | 2021-08-19 | 2021-11-19 | 海隆石油工业集团有限公司 | Heat treatment process for drill rod welding area |
| CN114574684A (en) * | 2021-05-15 | 2022-06-03 | 山西风雷钻具有限公司 | Method for heat treatment of welding area of mining drill rod |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014306A (en) * | 2012-12-14 | 2013-04-03 | 中国石油集团长城钻探工程有限公司工程服务公司 | Novel heat treatment process of drilling rod welding line of bainite/martensite mixed steel material |
| WO2014169592A1 (en) * | 2013-04-19 | 2014-10-23 | 宝山钢铁股份有限公司 | Manufacturing method for super 13cr friction-welded drill rod |
| US9988857B2 (en) | 2013-04-19 | 2018-06-05 | Baoshan Iron & Steel Co., Ltd. | Method for manufacturing superior 13Cr friction-welded drillrod |
| CN105803162A (en) * | 2016-06-08 | 2016-07-27 | 中国石油集团渤海石油装备制造有限公司 | 165-steel-grade drill rod weld joint heat treatment method |
| CN113106203A (en) * | 2021-03-18 | 2021-07-13 | 山东威玛装备科技股份有限公司 | Thick-wall drill rod friction welding seam layered heat treatment process |
| CN114574684A (en) * | 2021-05-15 | 2022-06-03 | 山西风雷钻具有限公司 | Method for heat treatment of welding area of mining drill rod |
| CN113667814A (en) * | 2021-08-19 | 2021-11-19 | 海隆石油工业集团有限公司 | Heat treatment process for drill rod welding area |
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Effective date of registration: 20200928 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Petroleum Equipment Manufacturing Co.,Ltd. Patentee after: BOHAI NKK DRILLING PIPE Co.,Ltd. Address before: 300457, No. 3, Tianjin Binhai service outsourcing industry park, No. 19 West Ring Road, Tianjin, Tanggu Patentee before: CNPC Bohai Petroleum Equipment Manufacturing Co.,Ltd. Patentee before: BOHAI NKK DRILLING PIPE Co.,Ltd. |