CN100516247C - Long thick wall petroleum drilling and mining steel pipe heat treatment technique - Google Patents
Long thick wall petroleum drilling and mining steel pipe heat treatment technique Download PDFInfo
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- CN100516247C CN100516247C CNB2007101884743A CN200710188474A CN100516247C CN 100516247 C CN100516247 C CN 100516247C CN B2007101884743 A CNB2007101884743 A CN B2007101884743A CN 200710188474 A CN200710188474 A CN 200710188474A CN 100516247 C CN100516247 C CN 100516247C
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Abstract
The invention provides a heat treatment technology for a long-thick wall petroleum drilling steel pipe. The invention comprises quenching and a tempering heat treatment technology. Firstly, the surface of the petroleum drilling steel pipe is cleaned, and oil stain can not exist on the surface; then quenching is performed under the intermediate frequency to be below 200 Hz, the quenching hardness reaches more than HRC48, and the tempering is performed on the petroleum drilling steel pipe within 4 hours after being quenched; during tempering, the intermediate frequency power source frequency is adjusted at 100 Hz. The adoption of the technical proposal ensures that the heat treatment operation steps and the technology parameters are reasonable and normative, the product satisfies the mechanical property requests such as hardness degree, the strength, the extensibility degree, the contraction percentage and the impact energy to a drilling rod connector issued by the department of the petroleum industry, and the qualified rate reaches more than 95 percent.
Description
Technical field
The present invention relates to the thermal treatment process of long bar and long heavy-walled Medium frequency induction thermal treatment process, particularly long thick wall petroleum drilling and mining steel pipe.
Background technology
The oil drill rocker that is used for the oil drilling industry, stone oil drill collar all need be rotated under the dark complicated geological state of several kms, carrying very macrobending power and deformation under load, so drilling and mining steel pipe must adopt high quality carbon element alloy steel to make, press standard-required, mechanical property requirements such as its hardness, intensity and toughness are very high, so the thermal treatment process in the production process is most important.China starts late to the production of petroleum drilling and mining steel pipe, the thermal treatment process production cost is high but also be difficult to reach its standard-required routinely, and product percent of pass only is about 60%, at present, the domestic Medium frequency induction process of thermal treatment that also is not used in petroleum drilling and mining steel pipe does not abroad appear in the newspapers yet.
Summary of the invention
The objective of the invention is to overcome present petroleum drilling and mining steel pipe does not have maturation process, the weak point that product percent of pass is low, and the long thick wall petroleum drilling and mining steel pipe heat treatment technique of provide a kind of qualified, standard, being convenient to operate can improve product percent of pass greatly.
Technical scheme of the present invention is, long thick wall petroleum drilling and mining steel pipe heat treatment technique comprises quenching, and tempering heat treatment is operated with processing parameter according to the following steps:
(1) the petroleum drilling and mining steel pipe surface-conditioning is clean, can not there be greasy dirt, in order to avoid influence temperature measurement accuracy and pollute Working environment.
(2) quench:
A, the intermediate frequency power supply parameter adjustment is reasonable, IF-FRE requires below 200 hertz;
B, with the screw type lathe workpiece is rotated to advance continuously and be heated to 860-900 ℃;
Readvance behind c, the workpiece plug for outlet and carry out shrend behind the 600mm, water temperature is 25--40 ℃,
To guarantee that workpiece has certain equal gentle insulating process;
D, quenching hardness reach more than the HRC48.
(3) petroleum drilling and mining steel pipe after quenching will tempering in 4 hours:
A, the intermediate frequency power supply parameter adjustment is reasonable, IF-FRE is 100 hertz, can guarantee the penetration depth of thermal treatment power supply like this;
B, with the screw type lathe workpiece is rotated to advance continuously and be heated to 630-660 ℃;
C, workpiece readvance after coming out of the stove and carry out water-cooled behind the 800mm, to guarantee workpiece certain equal gentle insulating process are arranged.
(4) check: every detection of carrying out hardness, mechanical property of the petroleum drilling and mining steel pipe after the tempering, eligible warehouse-in.
(5) hardness or mechanical property are defective can handle again.The tempering again that hardness is high, returning again that hardness is low quenched, and returns the number of times of quenching maximum three times.
Adopt above technical scheme, heat treatment operation step, reasonable, the standard of processing parameter, product satisfies the requirement of Ministry of Petroleum Industry to mechanical properties such as the hardness of oil drill rocker, stone oil drill collar and intensity, extensibility, shrinking percentage, ballistic works, and qualification rate reaches more than 95%.
Specific embodiment
The invention will be further described below by the example to the stone oil drill collar of certain group company processing.
Material is 4145H, and specification is diameter 172mm, and length is 9500mm.
(1) stone oil drill collar is cleaned out, be put on the mid-frequency induction hardening heating lathe;
(2) parameter of intermediate frequency power supply is voltage of intermediate frequency 750V, IF-FRE 160HZ, power 560KW;
(3) lathe moves continuously by per minute 250mm;
(4) stone oil drill collar is heated to 890 ℃;
(5) workpiece quenches when 650mm behind fire door;
(6) quenching water temperature is 35 ℃;
(7) temperature was directly to enter Medium frequency induction tempering heating lathe after 120 ℃ after stone oil drill collar quenched;
(8) parameter of tempering intermediate frequency power supply is voltage of intermediate frequency 750V, IF-FRE 100HZ, power 190KW;
(9) lathe moves continuously by per minute 250mm;
(10) stone oil drill collar is heated to 650 ℃;
(11) workpiece carries out water-cooled when 800mm behind fire door, and water temperature is 35 ℃;
(12) get final product below the work-piece cools to 60 ℃.
Through above heat treatment step, stone oil drill collar meets and surpasses american petroleum institute standard fully.
Detected result is as follows, and each makes a call to 6 points hardness two ends end face, and Brinell hardness HB is
Vertical line I 311 311 311 307 317 317
Vertical line II 309 311 313 313 315 313
Yield strength 820Mpa
Tensile strength 970Mpa
Unit elongation 21%
Relative reduction in area 60%
Charpy-V impact power 102J
American petroleum institute standard
Yield strength 〉=785Mpa tensile strength 〉=965Mpa unit elongation 〉=13%
Relative reduction in area 〉=45% Charpy-V impact power 54J Brinell hardness HB 285/341.
Claims (1)
1, long thick wall petroleum drilling and mining steel pipe heat treatment technique comprises quenching, and tempering heat treatment process is characterized in that operating with processing parameter according to the following steps:
(1) the petroleum drilling and mining steel pipe surface-conditioning is clean, can not there be greasy dirt;
(2) quench: IF-FRE is adjusted into below 200 hertz, with the screw type lathe workpiece is rotated to advance continuously and be heated to 860-900 ℃, readvance behind the workpiece plug for outlet and carry out shrend behind the 600mm, lathe moves continuously by per minute 250mm, water temperature is 25-40 ℃, quenching hardness reaches more than the HRC48, and the petroleum drilling and mining steel pipe after the quenching will tempering in 4 hours;
(3) tempering: the intermediate frequency power supply frequency is adjusted into 100 hertz, with the screw type lathe workpiece is rotated to advance continuously and be heated to 630-660 ℃, carry out water-cooled behind the 800mm that readvances after workpiece is come out of the stove, wherein lathe moves continuously by per minute 250mm;
(4) check: every detection of carrying out hardness, mechanical property of the petroleum drilling and mining steel pipe after the tempering, eligible warehouse-in;
(5) hardness or mechanical property are underproof handles again, the tempering again that hardness is high, and returning again that hardness is low quenched, and returns the number of times of quenching maximum three times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101884743A CN100516247C (en) | 2007-12-04 | 2007-12-04 | Long thick wall petroleum drilling and mining steel pipe heat treatment technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101884743A CN100516247C (en) | 2007-12-04 | 2007-12-04 | Long thick wall petroleum drilling and mining steel pipe heat treatment technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101168794A CN101168794A (en) | 2008-04-30 |
| CN100516247C true CN100516247C (en) | 2009-07-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101884743A Expired - Fee Related CN100516247C (en) | 2007-12-04 | 2007-12-04 | Long thick wall petroleum drilling and mining steel pipe heat treatment technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100516247C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2468904A4 (en) * | 2009-08-21 | 2016-03-23 | Nippon Steel & Sumitomo Metal Corp | Method for manufacturing thick-walled seamless steel pipe |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942550B (en) * | 2010-09-06 | 2012-05-23 | 中原特钢股份有限公司 | Heat treatment process for hollow drill collar |
| CN103789523B (en) * | 2012-11-27 | 2016-04-13 | 贵州高峰石油机械股份有限公司 | Improve method and the courtyard drilling rod of courtyard drilling rod moment of torsion and wear resistance |
| CN103710510A (en) * | 2013-12-30 | 2014-04-09 | 内蒙古科技大学 | Induction tempering method of high-strength medium plate |
| CN104894342A (en) * | 2015-05-26 | 2015-09-09 | 成都高普石油工程技术有限公司 | Machining method of petroleum drilling rod |
| CN111575450A (en) * | 2020-06-15 | 2020-08-25 | 大冶特殊钢有限公司 | Seamless steel pipe and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080229A (en) * | 1993-05-29 | 1994-01-05 | 西安工业学院 | A kind of method of making thick-walled long-tube heavy machine member |
| US6210806B1 (en) * | 1998-02-23 | 2001-04-03 | Sumitomo Metal Industries, Ltd. | Martensitic stainless steel having oxide scale layers |
| CN1391020A (en) * | 2001-06-07 | 2003-01-15 | 天津钢管公司 | Medium-strength sleeved petroleum pipe for hot recovery well of thick oil and its making method |
| CN1690241A (en) * | 2004-04-28 | 2005-11-02 | 宝山钢铁股份有限公司 | High-strength drilling rod for petroleum and method for making same |
| CN2861178Y (en) * | 2005-12-19 | 2007-01-24 | 西安博大电炉有限公司 | Medium frequency quenching and tempering hot-treatment device for petroleum drilling tool such as drill collar and loading drill rod |
-
2007
- 2007-12-04 CN CNB2007101884743A patent/CN100516247C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080229A (en) * | 1993-05-29 | 1994-01-05 | 西安工业学院 | A kind of method of making thick-walled long-tube heavy machine member |
| US6210806B1 (en) * | 1998-02-23 | 2001-04-03 | Sumitomo Metal Industries, Ltd. | Martensitic stainless steel having oxide scale layers |
| CN1391020A (en) * | 2001-06-07 | 2003-01-15 | 天津钢管公司 | Medium-strength sleeved petroleum pipe for hot recovery well of thick oil and its making method |
| CN1690241A (en) * | 2004-04-28 | 2005-11-02 | 宝山钢铁股份有限公司 | High-strength drilling rod for petroleum and method for making same |
| CN2861178Y (en) * | 2005-12-19 | 2007-01-24 | 西安博大电炉有限公司 | Medium frequency quenching and tempering hot-treatment device for petroleum drilling tool such as drill collar and loading drill rod |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2468904A4 (en) * | 2009-08-21 | 2016-03-23 | Nippon Steel & Sumitomo Metal Corp | Method for manufacturing thick-walled seamless steel pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101168794A (en) | 2008-04-30 |
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Granted publication date: 20090722 Termination date: 20121204 |