CN101781702A - Process for heat treatment of tube body of drill rod - Google Patents
Process for heat treatment of tube body of drill rod Download PDFInfo
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- CN101781702A CN101781702A CN 201010124652 CN201010124652A CN101781702A CN 101781702 A CN101781702 A CN 101781702A CN 201010124652 CN201010124652 CN 201010124652 CN 201010124652 A CN201010124652 A CN 201010124652A CN 101781702 A CN101781702 A CN 101781702A
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Abstract
The invention discloses a process for heat treatment of the tube body of a drill rod, which comprises quenching and tempering heat treatment. The process comprises the following steps with the following process parameters: (1) quenching: a, conveying the tube body of the drill rod to a stepping quenching furnace with the temperature rising to be 880-930 DEG C, and keeping the temperature for 40-60 minutes; b, taking the tube body of the drill rod out of the furnace and placing the tube body of the drill rod into quenching solution with the temperature being 10-30 DEG C within 15 seconds, wherein the quenching time is no less than 30 seconds; and (2) tempering: conveying the tube body of the drill rod to a stepping tempering furnace with the temperature rising to be 560-590 DEG C, keeping the temperature for 60-85 minutes, taking the tube body of the drill rod out of the furnace, and naturally cooling the tube body of the drill rod to the room temperature. When the invention is applied, the impact performance of the drill rod is good and is 30 percent above the V150 steel grade standard; the strength, elongation rate and other mechanical indicators of the tube body of the drill rod after heat treatment meet the V150 steel grade requirements, and the qualification rate is higher than 98 percent; and the operating steps and process parameters of the heat treatment of the invention are reasonable.
Description
Technical field
The present invention relates to a kind of thermal treatment process of body, especially a kind of manufacturing has quenching, the tempering process than the drill pipe body of high-mechanical property, makes it can reach the standard of V150 grade of steel.
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 more and more higher requirement to drilling rod.At present in the API series drilling rod intensity the highest be the S135 grade of steel, but along with the increase of drilling depth, also in continuous increase, the drilling rod of S135 grade of steel can't satisfy the requirement of part deep-well to the requirement of strength of drilling rod.
External drilling rod industry has proposed the standard of the new grade of steel of this drilling rod industry of V150 grade of steel.The V150 steel grade drill pipe is all had higher requirement to starting material and heat treatment capacity.Domestic disclosed thermal treatment process is difficult to reach the technical requirements of V150 steel grade drill pipe at present, and especially the tensile property of the drill pipe body after the thermal treatment can not meet the demands, and relevant thermal treatment process is not abroad appeared in the newspapers yet.
Summary of the invention
The technical problem to be solved in the present invention provides the thermal treatment process that a kind of manufacturing of reliably, being convenient to operate meets the drill pipe body of V150 grade of steel.
For solving the problems of the technologies described above, the technical solution used in the present invention comprises quenching, tempering, and the steel grades and the content that are used for thermal treatment process are, C:0.24-0.30, Cr:0.85-1.20, Mo:0.50-0.75, V:0-0.05, Si:0.10-0.40, Mn:0.60-1.00, Cu:0-0.05, S :≤0.015, P :≤0.020, surplus is Fe, unit is a mass percent, operates with processing parameter as follows:
1. quench
A, drill pipe body is transported in the stepped start-stop system quenching furnance that is warming up to 880 ℃-930 ℃, is incubated 40-60 minute,
After b, drill pipe body are come out of the stove, enter 10 ℃-30 ℃ hardening liquid in 15 seconds, the cool time is no less than 30 seconds,
2. tempering
Drill pipe body is transported in the stepped start-stop system tempering stove that is warming up to 560 ℃-590 ℃, is incubated 60-85 minute, again drill pipe body is come out of the stove, naturally cool to room temperature.
Further improve and be:
Drill pipe body after the quenching carried out tempering in four hours.
Described hardening liquid is a tap water, and the temperature of hardening liquid is regulated by cooling tower.
The drill pipe body of quenching step described in 1. carries out rotation in hardening liquid, autorotation speed is 70-100 rev/min.
1. after 2. handling no more than 200 of drill pipe body with step according to step, do the mechanicl test of 1 upset end and drill pipe body, test subject is tensile strength and ballistic work, qualified after, warehouse-in.This step is in order to strengthen quality monitoring.
Described ballistic work test underproof drill pipe body again according to step 1. and 2. quench, tempering heat treatment, quench again, the number of times of tempering heat treatment is no more than three times.
During described ballistic work stand the test, 2. the higher drill pipe body of tensile strength carries out tempering according to step again, times of tempering is no more than three times, the drill pipe body that tensile strength is on the low side again according to step 1. and 2. quench, tempering heat treatment, quench again, the tempering heat treatment number of times is no more than three times.
After adopting the present invention that the drill pipe body of above-mentioned steel grade is heat-treated, the ballistic work performance of drill pipe body is good, compares with the 54J of V150 grade of steel standard value, exceeds more than 30%; And mechanical index such as intensity of the drill pipe body after the thermal treatment, unit elongation all reaches the requirement of V150 grade of steel, filled up blank both domestic and external; The heat treatment step that the present invention is provided with is simple, and processing parameter is reasonable, handles qualification rate and reaches more than 98%.
Embodiment
Below by embodiment invention is described in further detail.
Embodiment 1
Adopt the drill pipe body of certain company, its chemical ingredients is, C:0.26, and Cr:0.98, Mo:0.64, V:0.005, Si:0.22, Mn:0.75, Cu:0.03, S:0.001, P:0.008, surplus is Fe, unit is a mass percent.Heat-treat according to the following step:
1. quench
A, drill pipe body is transported in the stepped start-stop system quenching furnance that is warming up to 910 ℃, is incubated 60 minutes;
After b, drill pipe body are come out of the stove, enter 23 ℃ hardening liquid in 15 seconds, hardening liquid is a tap water, and carry out rotation with 88 rev/mins speed, 40 seconds cool times, wherein the temperature of hardening liquid is regulated by cooling tower, and drill pipe body is for quick, uniform hardening with the given pace rotation, forms tiny, uniform grain structure.
2. tempering
Quenched 1 hour in, drill pipe body is transported in the stepped start-stop system tempering stove that is warming up to 575 ℃, be incubated 70 minutes; Again drill pipe body is come out of the stove, naturally cool to room temperature.
Through above heat treatment step, the mechanical property of drill pipe body is as follows:
Yield strength 1090MPa
Tensile strength 1180MPa
Unit elongation 22.0%
Charpy-V impact power (21 ℃) is 99J vertically.
The mechanical property of above-mentioned drill pipe body meets the technical requirements of following V150 grade of steel:
Yield strength 1034-1138MPa
Tensile strength 〉=1103MPa
Unit elongation 〉=13.0%
Charpy-V impact power (21 ℃) vertically 〉=54J.
The metallographic structure of the body after the thermal treatment process of drill pipe body of the present invention is handled, crystal grain is tiny, and evenly the upset end inside and outside wall is 10 grades, and 9 grades of inboard wall of tube body, 9.5 grades of outer walls are for the performance of aspects such as the tension of drill pipe body, antifatigue provides assurance.
According to above-mentioned steps quench, behind 100 of the tempering heat treatment drill pipe bodies, the mechanicl test of doing 1 upset end and drill pipe body is as quality monitoring, test subject is tensile strength and ballistic work.Two test-results all meet the technical requirements of V150 grade of steel, with 100 drill pipe body warehouse-ins of above-mentioned processing.
If ballistic work test underproof drill pipe body again according to step 1. and 2. quench, tempering heat treatment, quench again, the number of times of tempering heat treatment is no more than three times.
When the ballistic work stand the test, 2. the higher drill pipe body of tensile strength carries out tempering according to step again, times of tempering is no more than three times, the drill pipe body that tensile strength is on the low side again according to step 1. and 2. quench, tempering heat treatment, quench again, the tempering heat treatment number of times is no more than three times.
Embodiment 2
Adopt the drill pipe body of certain company, its chemical ingredients is: C:0.26, and Cr:0.97, Mo:0.70, V:0.004, Si:0.21, Mn:0.74, Cu:0.03, S:0.001, P:0.008, surplus is Fe, unit is a mass percent.
1. quench
A, drill pipe body is transported in the stepped start-stop system quenching furnance that is warming up to 930 ℃, is incubated 50 minutes;
Enter 30 ℃ hardening liquid in 15 seconds after b, drill pipe body are come out of the stove, hardening liquid is a water, and carries out rotation with 100 rev/mins speed, 35 seconds cool times.
2. tempering
Quenched 3 hours in, drill pipe body is transported in the stepped start-stop system tempering stove that is warming up to 590 ℃, be incubated 60 minutes; Drill pipe body is come out of the stove, air cooling is to room temperature again.
Through above heat treatment step, the mechanical property of drill pipe body is as follows:
Yield strength 1040MPa
Tensile strength 1110MPa
Unit elongation 19.0%
Charpy-V impact power (21 ℃) vertically single group 103J, 106J, 101J, average out to 103J.
The mechanical property of above-mentioned drill pipe body meets the technical requirements of following V150 grade of steel.
The metallographic structure of the body after the thermal treatment process of drill pipe body of the present invention is handled, the upset end inside and outside wall is 9.5 grades, and the body inside and outside wall is 9 grades.
After 200 of above-mentioned quenchings, tempering heat treatment drill pipe body, the mechanicl test of doing 1 upset end and drill pipe body is as quality monitoring, and test subject is tensile strength and ballistic work.Two test-results all meet the technical requirements of V150 grade of steel, with 200 drill pipe body warehouse-ins of above-mentioned processing.
Embodiment 3
Adopt the drill pipe body of certain company, its chemical ingredients is: C:0.26, and Cr:0.94, Mo:0.60, V:0.004, Si:0.22, Mn:0.75, Cu:0.03, S:0.001, P:0.008, all the other are Fe,
Unit is a mass percent.
1. quench
A, drill pipe body is transported in the stepped start-stop system quenching furnance that is warming up to 880 ℃, is incubated 40 minutes;
Enter 12 ℃ hardening liquid in 15 seconds after b, drill pipe body are come out of the stove, hardening liquid is a tap water, and carries out rotation with 70 rev/mins speed, 60 seconds cool times.
2. tempering
Quenched 4 hours in, drill pipe body is transported in the stepped start-stop system tempering stove that is warming up to 560 ℃, be incubated 85 minutes; Drill pipe body is come out of the stove, air cooling is to room temperature again.
Through above heat treatment step, the mechanical property of drill pipe body is as follows:
Yield strength 1060MPa
Tensile strength 1130MPa
Unit elongation 22.0%
Charpy-V impact power (21 ℃) vertically single group 107J, 108J, 120J, average out to 112J.
The mechanical property of above-mentioned drill pipe body meets the technical requirements of following V150 grade of steel.
The metallographic structure of the body after the thermal treatment process of drill pipe body of the present invention is handled, the upset end inside and outside wall is 9.5 grades, and the body inside and outside wall is 9 grades.
Claims (7)
1. the thermal treatment process of a drill pipe body comprises quenching, tempering, and the steel grades and the content that are used for thermal treatment process are, C:0.24-0.30, Cr:0.85-1.20, Mo:0.50-0.75, V:0-0.05, Si:0.10-0.40, Mn:0.60-1.00, Cu:0-0.05, S :≤0.015, P :≤0.020, surplus is Fe, unit is a mass percent, it is characterized in that, operates with processing parameter as follows:
1. quench
A, drill pipe body is transported in the stepped start-stop system quenching furnance that is warming up to 880 ℃-930 ℃, is incubated 40-60 minute,
After b, drill pipe body are come out of the stove, enter 10 ℃-30 ℃ hardening liquid in 15 seconds, the cool time is no less than 30 seconds,
2. tempering
Drill pipe body is transported in the stepped start-stop system tempering stove that is warming up to 560 ℃-590 ℃, is incubated 60-85 minute, again drill pipe body is come out of the stove, naturally cool to room temperature.
2. the thermal treatment process of drill pipe body according to claim 1, the drill pipe body after it is characterized in that quenching carried out tempering in four hours.
3. the thermal treatment process of drill pipe body according to claim 1 is characterized in that described hardening liquid is a tap water, and the temperature of hardening liquid is regulated by cooling tower.
4. the thermal treatment process of drill pipe body according to claim 1, the drill pipe body of step described in 1. that it is characterized in that quenching carries out rotation in hardening liquid, and autorotation speed is 70-100 rev/min.
5. the thermal treatment process of drill pipe body according to claim 1, after it is characterized in that 1. 2. handling no more than 200 of drill pipe body with step according to step, do the mechanicl test of 1 upset end and drill pipe body, test subject is tensile strength and ballistic work, after qualified, warehouse-in.
6. the thermal treatment process of drill pipe body according to claim 5, it is characterized in that described ballistic work test underproof drill pipe body again according to step 1. and 2. quench, tempering heat treatment, quench again, the number of times of tempering heat treatment is no more than three times.
7. the thermal treatment process of drill pipe body according to claim 5, when it is characterized in that described ballistic work stand the test, 2. the higher drill pipe body of tensile strength carries out tempering according to step again, times of tempering is no more than three times, the drill pipe body that tensile strength is on the low side again according to step 1. and 2. quench, tempering heat treatment, quench again, the tempering heat treatment number of times is no more than three times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101246528A CN101781702B (en) | 2010-03-16 | 2010-03-16 | Process for heat treatment of tube body of drill rod |
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| CN2010101246528A CN101781702B (en) | 2010-03-16 | 2010-03-16 | Process for heat treatment of tube body of drill rod |
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| CN101781702A true CN101781702A (en) | 2010-07-21 |
| CN101781702B CN101781702B (en) | 2012-05-02 |
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| CN2010101246528A Expired - Fee Related CN101781702B (en) | 2010-03-16 | 2010-03-16 | Process for heat treatment of tube body of drill rod |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103266217A (en) * | 2013-05-10 | 2013-08-28 | 中国石油天然气集团公司 | Reinforcing thermal treatment technology for pipe end of petroleum steel pipe in quenching and tempering condition |
| CN103266216A (en) * | 2013-05-10 | 2013-08-28 | 中国石油天然气集团公司 | Strength mismatching heat treatment process for petroleum steel tube in hardened and tempered state |
| CN103320697A (en) * | 2013-06-17 | 2013-09-25 | 中国石油集团渤海石油装备制造有限公司 | Drill rod pipe body applied to ultra-deep well working condition and manufacturing method thereof |
| CN103898304A (en) * | 2014-03-25 | 2014-07-02 | 江苏和信石油机械有限公司 | Heat treatment process of novel drill pipe body for mine exploration |
| 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 |
| CN107604258A (en) * | 2017-08-09 | 2018-01-19 | 包头钢铁（集团）有限责任公司 | Drill pipe body seamless steel pipe and its production method |
| CN109702443A (en) * | 2019-01-03 | 2019-05-03 | 六安煜晟电子科技有限公司 | A kind of production technology of anti-oxidant pcb board drill point steel handle |
| JP2020117790A (en) * | 2019-01-25 | 2020-08-06 | 古河ロックドリル株式会社 | Drill tool and method of manufacturing the same |
| CN112226694A (en) * | 2020-10-12 | 2021-01-15 | 江阴雷特斯钻具有限公司 | Trenchless drill rod and heat treatment process thereof |
| CN112280963A (en) * | 2020-10-27 | 2021-01-29 | 山东威玛装备科技股份有限公司 | Heat treatment method for ultrahigh-strength drill pipe body |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103266216B (en) * | 2013-05-10 | 2015-01-21 | 中国石油天然气集团公司 | Strength mismatching heat treatment process for petroleum steel tube in hardened and tempered state |
| CN103266217A (en) * | 2013-05-10 | 2013-08-28 | 中国石油天然气集团公司 | Reinforcing thermal treatment technology for pipe end of petroleum steel pipe in quenching and tempering condition |
| CN103266216A (en) * | 2013-05-10 | 2013-08-28 | 中国石油天然气集团公司 | Strength mismatching heat treatment process for petroleum steel tube in hardened and tempered state |
| CN103266217B (en) * | 2013-05-10 | 2015-01-21 | 中国石油天然气集团公司 | Reinforcing thermal treatment technology for pipe end of petroleum steel pipe in quenching and tempering condition |
| CN103320697B (en) * | 2013-06-17 | 2015-11-18 | 中国石油集团渤海石油装备制造有限公司 | A kind of drill pipe body and manufacture method thereof being applied to ultra deep well operating mode |
| CN103320697A (en) * | 2013-06-17 | 2013-09-25 | 中国石油集团渤海石油装备制造有限公司 | Drill rod pipe body applied to ultra-deep well working condition and manufacturing method thereof |
| CN103898304A (en) * | 2014-03-25 | 2014-07-02 | 江苏和信石油机械有限公司 | Heat treatment process of novel drill pipe body for mine exploration |
| CN103898304B (en) * | 2014-03-25 | 2016-08-17 | 江苏和信石油机械有限公司 | The Technology for Heating Processing of Prospection drill rod body |
| 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 |
| CN107604258A (en) * | 2017-08-09 | 2018-01-19 | 包头钢铁（集团）有限责任公司 | Drill pipe body seamless steel pipe and its production method |
| CN109702443A (en) * | 2019-01-03 | 2019-05-03 | 六安煜晟电子科技有限公司 | A kind of production technology of anti-oxidant pcb board drill point steel handle |
| JP2020117790A (en) * | 2019-01-25 | 2020-08-06 | 古河ロックドリル株式会社 | Drill tool and method of manufacturing the same |
| CN112226694A (en) * | 2020-10-12 | 2021-01-15 | 江阴雷特斯钻具有限公司 | Trenchless drill rod and heat treatment process thereof |
| CN112280963A (en) * | 2020-10-27 | 2021-01-29 | 山东威玛装备科技股份有限公司 | Heat treatment method for ultrahigh-strength drill pipe body |
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