CN104988407A - Petroleum drilling sulphur-resisting drill pipe and preparation method thereof - Google Patents
Petroleum drilling sulphur-resisting drill pipe and preparation method thereof Download PDFInfo
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- CN104988407A CN104988407A CN201510348068.3A CN201510348068A CN104988407A CN 104988407 A CN104988407 A CN 104988407A CN 201510348068 A CN201510348068 A CN 201510348068A CN 104988407 A CN104988407 A CN 104988407A
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- drill pipe
- pipe body
- petroleum drilling
- steel tube
- sulphur
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Abstract
The invention discloses a petroleum drilling sulphur-resisting drill pipe and a preparation method thereof and relates to the technical field of petroleum drilling equipment. Steel components of a drill pipe body include, by mass, 0.22-0.30% of C, 0.22-0.35% of Si, 0.40-0.55% of Mn, 1.00-1.15% of Cr, 0.40-0.55% of Mo, 0.02-0.05% of V, 0.0005% or less of B, 0.010-0.025% of Nb, 0.005% or less of S, 0.008% or less of P and the balance Fe. The yield strength of the material of the drill pipe reaches 730-780 MPa, the tensile strength of the material of the drill pipe is larger than 820 MPa, the percentage elongation is larger than 16%, and charpy V-shaped notch impact energy is larger than 140 J. The petroleum drilling sulphur-resisting drill pipe passes a 720-hour hydrogen-sulfide-stress-corrosion-resistant test under a NACE standard solution. The petroleum drilling sulphur-resisting drill pipe solves the problems that a drill pipe in the prior art is high in hydrogen sulfide stress corrosion cracking sensitivity, stress corrosion cracking, hydrogen brittleness, cracks and the like of the drill pipe and the situation that the drill pipe loses efficacy can be caused easily, the sensitivity of the drill pipe to H2S stress corrosion can be reduced, the strength, the impact toughness and the corrosion resistance of the drill pipe body are improved, and production requirements are met.
Description
Technical field
The present invention relates to oil-well drilling equipment technical field, especially a kind of petroleum drilling sulfur resistant drill pipe and preparation method thereof.
Background technology
Domestic Sichuan-chongqing Region hydrocarbon resources is generally containing H
2s, and senior steel drill rod is very responsive to the stress corrosion crack of hydrogen sulfide, the existence of hydrogen sulfide is easy to cause the problems such as Hi-grade steel drilling rod generation stress corrosion crack, hydrogen embrittlement, cause the problems such as drill pipe body fracture, inefficacy, great harm is caused to drilling engineering, even have a strong impact on production, therefore need to adopt sulfur resistant drill pipe, although sulfur resistant drill pipe has been produced and has applied both at home and abroad, but the anti-H 2 S stress corrosion performance of sulfur resistant drill pipe and shock resistance still existing defects, material and the manufacturing process of body still have much room for improvement.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of petroleum drilling sulfur resistant drill pipe and preparation method thereof, solve the stress corrosion opening cracking maleate sensitivity of drilling rod to hydrogen sulfide in prior art high, easily cause the problem such as drilling rod stress corrosion crack, hydrogen embrittlement, fracture, inefficacy, the present invention, by improving the material of drilling rod, greatly reduces drilling rod to H
2the susceptibility of S stress corrosion, improves the intensity of drill pipe body, impelling strength and solidity to corrosion, can meet Production requirement.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of petroleum drilling sulfur resistant drill pipe and preparation method thereof, and the steel grades of this drill pipe body is: C:0.22-0.30, Si:0.22-0.35, Mn:0.40-0.55, Cr:1.00-1.15, Mo:0.40-0.55, V:0.02-0.05, B :≤0.0005, Nb:0.010-0.025, S :≤0.005, P :≤0.008, surplus is Fe, and unit is mass percent; This drilling rod material yield strength reaches 730-780MPa, and tensile strength is greater than 820MPa, and elongation after fracture is greater than 16%, and the summer is greater than 140J than v-notch ballistic work; By hour anti-H 2 S stress corrosion test of 720 under NACE standardized solution.
The present invention mainly comprises the steps:
The first step, casting seamless steel tube blank, makes chemical composition meet the requirements;
Second step: make drill pipe body, by the heating one end of seamless steel tube blank, then passes through mechanical type upsetter by end upsetting, is thickeied by the other end of weldless steel tube, machining, make drill pipe body according to the same manner;
3rd step, quenching
4th step, tempering, naturally cools to room temperature, reaches required performance.
Further, second step, is heated to 1200-1300 DEG C by within one end 400mm of seamless steel tube blank, then adopt post forming mode by end upsetting by mechanical type upsetter, subsequently the other end of weldless steel tube is thickeied according to the same manner, machining, make drill pipe body;
3rd step, quenching
Drill pipe body is warming up to 880 DEG C-920 DEG C, be incubated and come out of the stove after 80-110 minute, enter the hardening liquid of 10 DEG C-25 DEG C in 20 seconds, the cool time is no less than 35 seconds;
4th step, tempering
Drill pipe body is warming up to 680 DEG C-720 DEG C, insulation 110-140 minute, adopts the water of 10 DEG C-25 DEG C to cool subsequently in 15 seconds, be no less than 15 seconds cooling time, naturally cool to room temperature subsequently.
The beneficial effect adopting technique scheme to produce is: this drill pipe body by conservative control steel grade constituent content, and adds B, Nb element, reduces material to H
2the susceptibility of S stress corrosion, simultaneously by the fast deepfreeze after tempering, improve the homogeneity of mechanical property after drill pipe body thermal treatment, drill pipe body is made to have enough intensity and good impelling strength, have passed the anti-H 2 S stress corrosion tests in 720 hours under NACE standardized solution, can meet containing H
2the demand of S hole condition.
Embodiment
The present invention is further detailed explanation below.
The chemical composition of the steel grade of drill pipe body of the present invention: C:0.22-0.30, Si:0.22-0.35, Mn:0.40-0.55, Cr:1.00-1.15, Mo:0.40-0.55, V:0.02-0.05, B :≤0.0005, Nb:0.010-0.025, S :≤0.005, P :≤0.008, surplus is Fe, and unit is mass percent.
Carry out proportioning according to the present invention to the chemical composition of drill pipe body, make Φ 101.6x9.65mm, the weldless steel tube of long 9000-9500mm, manufactures in accordance with the following steps.Its manufacture method is: make drill pipe body; Carry out complete heat treatment to drill pipe body subsequently, thermal treatment process is quenching+tempering rapid cooling technique.
Concrete technology and step is as follows:
The first step, casting seamless steel tube blank, makes chemical composition meet the requirements;
Weldless steel tube two ends are thickeied and make drill pipe body by second step;
1200-1300 DEG C is heated to by within one end 400mm of weldless steel tube, type of heating adopts the mode of 1 intermediate frequency furnace, 1 pipe end soaking pit, then adopt post forming mode by end upsetting by mechanical type upsetter, after one end has thickeied, the other end is thickeied according to the same manner, make drill pipe body;
3rd step, carries out integral quenching
Be transported to by drill pipe body and be warming up in the stepped start-stop system quenching furnance of 880 DEG C-920 DEG C, be incubated and come out of the stove after 80-110 minute, enter the hardening liquid of 10 DEG C-25 DEG C in 20 seconds, the cool time is no less than 35 seconds;
4th step, carries out tempering
Drill pipe body is transported to and is warming up in the stepped start-stop system tempering stove of 680 DEG C-720 DEG C, insulation 110-140 minute, adopt the water of 10 DEG C-25 DEG C to cool subsequently in 15 seconds, be no less than 15 seconds cooling time, naturally cool to room temperature subsequently.Drill pipe body adopts fast deepfreeze after tempering, maintains body mechanical property homogeneity after thermal treatment, improves body impelling strength, reduce body hardness.
When weldless steel tube two ends thicken by described step 2, molding mode is for adopting mechanical type upsetter, and this post forming mode processing step, for carrying out post forming, completes thickening in the time being at every turn molded over 1-2s.
After described step 4 tempering, described drill pipe body be organized as tempered sorbite and ferrite composition, and tempered sorbite content is more than 95%.
Here be processed into sulfur resistant drill pipe body chemical composition proportioning as table 1, and undertaken such as table 2 by the mechanical property of industry standard test;
Table 1
Finished product drill pipe body normal temperature lower yield strength
Table 2
Contrast table 1 and table 2 can be found out, body of the present invention at normal temperatures yield strength can reach between 730-780MPa, and tensile strength is greater than 820MPa, and elongation after fracture is greater than 16%, and the summer is greater than 140J than v-notch ballistic work (20 DEG C, 7.5x10mm).
Adopt finished product drill pipe body prepared by said components and technique, yield strength reaches between 730-780MPa at normal temperatures, and tensile strength is greater than 820MPa, and elongation after fracture is greater than 16%, and the summer is greater than 140J than v-notch ballistic work (20 DEG C, 7.5x10mm).
Finished product drill pipe body, can by the anti-H 2 S stress corrosion tests in 720 hours under NACE standardized solution under above-mentioned mechanical property.
Therefore, the finished product drill pipe body adopting said components and technique to prepare, improves anti-H 2 S stress corrosion performance, improves body impelling strength, reduce the hardness of body.
Claims (3)
1. a petroleum drilling sulfur resistant drill pipe, is characterized in that, the steel grades of this drill pipe body is: C:0.22-0.30, Si:0.22-0.35, Mn:0.40-0.55, Cr:1.00-1.15, Mo:0.40-0.55, V:0.02-0.05, B :≤0.0005, Nb:0.010-0.025, S :≤0.005, P :≤0.008, surplus is Fe, and unit is mass percent; This drilling rod material yield strength reaches 730-780MPa, and tensile strength is greater than 820MPa, and elongation after fracture is greater than 16%, and the summer is greater than 140J than v-notch ballistic work; By hour anti-H 2 S stress corrosion test of 720 under NACE standardized solution.
2. the preparation method of petroleum drilling sulfur resistant drill pipe according to claim 1, is characterized in that, mainly comprise the steps:
The first step, casting seamless steel tube blank, makes chemical composition meet the requirements;
Second step, makes drill pipe body: by the heating one end of seamless steel tube blank, then passes through mechanical type upsetter by end upsetting, is thickeied by the other end of weldless steel tube, machining, make drill pipe body according to the same manner;
3rd step, quenching
4th step, tempering: naturally cool to room temperature, reaches required performance.
3. the preparation method of petroleum drilling sulfur resistant drill pipe according to claim 2, is characterized in that,
Second step, be heated to 1200-1300 DEG C by within one end 400mm of seamless steel tube blank, then adopt post forming mode by end upsetting by mechanical type upsetter, subsequently the other end of weldless steel tube is thickeied according to the same manner, machining, makes drill pipe body;
3rd step, quenching
Drill pipe body is warming up to 880 DEG C-920 DEG C, be incubated and come out of the stove after 80-110 minute, enter the hardening liquid of 10 DEG C-25 DEG C in 20 seconds, the cool time is no less than 35 seconds;
4th step, tempering
Drill pipe body is warming up to 680 DEG C-720 DEG C, insulation 110-140 minute, adopts the water of 10 DEG C-25 DEG C to cool subsequently in 15 seconds, be no less than 15 seconds cooling time, naturally cool to room temperature subsequently.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107151761A (en) * | 2016-10-28 | 2017-09-12 | 中国石油集团渤海石油装备制造有限公司 | A kind of high toughness petroleum drilling rod and its manufacture method |
| CN107151758A (en) * | 2016-10-28 | 2017-09-12 | 中国石油集团渤海石油装备制造有限公司 | The manufacture method of resistant to carbon dioxide and chloride ion corrosion oil drill rocker body |
| CN113334029A (en) * | 2021-06-04 | 2021-09-03 | 重庆艾肯机电设备有限公司 | Manufacturing method of high-strength drill rod |
| WO2022142760A1 (en) * | 2020-12-30 | 2022-07-07 | 天津钢管制造有限公司 | Method for improving dimensional precision of ends of deep-sea steel catenary riser |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107151761A (en) * | 2016-10-28 | 2017-09-12 | 中国石油集团渤海石油装备制造有限公司 | A kind of high toughness petroleum drilling rod and its manufacture method |
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| CN107151758B (en) * | 2016-10-28 | 2019-05-10 | 中国石油集团渤海石油装备制造有限公司 | The manufacturing method of resistant to carbon dioxide and chloride ion corrosion oil drill rocker tube body |
| WO2022142760A1 (en) * | 2020-12-30 | 2022-07-07 | 天津钢管制造有限公司 | Method for improving dimensional precision of ends of deep-sea steel catenary riser |
| CN113334029A (en) * | 2021-06-04 | 2021-09-03 | 重庆艾肯机电设备有限公司 | Manufacturing method of high-strength drill rod |
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Inventor after: Jiang Rongkai Inventor after: Liu Anjian Inventor after: Wu Guowei Inventor after: Liu Cong Inventor after: Ji Haitao Inventor after: Liu Rong Inventor after: Zuo Bin Inventor after: Chen Xu Inventor after: Zhang Wenjiang Inventor after: Li Yamin Inventor after: Zhang Huijie Inventor before: Jiang Rongkai Inventor before: Wu Guowei Inventor before: Liu Cong Inventor before: Liu Rong Inventor before: Zhou Qiufen Inventor before: Chen Xu Inventor before: Zhang Wenjiang Inventor before: Li Yamin Inventor before: Zhang Huijie Inventor before: Liu Anjian |
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| TR01 | Transfer of patent right |
Effective date of registration: 20180830 Address after: 83rd Second Avenue, Binhai New Area Development Zone, Tianjin City, 300457 days Co-patentee after: Bohai Nengke Drill Pipe Co., Ltd. Patentee after: CNPC Bohai Equipment Manufacturing Co., Ltd. Address before: 300457 Tianjin Binhai New Area 19, Tianjin, TEDA Service Outsourcing Industrial Park 3. Co-patentee before: HG (Hebei) Petroleum Special Tube Co., Ltd. Patentee before: CNPC Bohai Equipment Manufacturing Co., Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20200923 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. second, 83 Avenue, Tianjin Binhai New Area Development Zone Patentee before: CNPC Bohai Petroleum Equipment Manufacturing Co.,Ltd. Patentee before: BOHAI NKK DRILLING PIPE Co.,Ltd. |
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