CN100351404C - Petroleum drilling rod joint higher hardness number treating process - Google Patents
Petroleum drilling rod joint higher hardness number treating process Download PDFInfo
- Publication number
- CN100351404C CN100351404C CNB200510095675XA CN200510095675A CN100351404C CN 100351404 C CN100351404 C CN 100351404C CN B200510095675X A CNB200510095675X A CN B200510095675XA CN 200510095675 A CN200510095675 A CN 200510095675A CN 100351404 C CN100351404 C CN 100351404C
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- tempering
- joint
- drill pipe
- rod joint
- pipe sub
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- Expired - Fee Related
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- Earth Drilling (AREA)
Abstract
The present invention relates to a technology for treating the higher hardness value of a petroleum drill rod joint. A drill rod joint of which the surface does not have a phosphate layer is firstly copperized, and then is processed by the tempering, the tempering temperature is controlled from 630 DEG C. to 680 DEG C. and is kept for 100 to 140 min, and the drill rod joint is cooled to the normal temperature by water. For a joint of which the surface has a phosphate layer, firstly, the phosphate layer is removed by pickling, and the joint is copperized and processed by the tempering. The present invention aims at the problems that the hardness value is often higher in the production of the drill rod joint, and the comprehensive mechanical performance is reduced. After the joint is treated, the hardness of the joint is reduced within a prescribed range of HB 293 to 331, the deformation of teeth of threads of the joint and the surface decarburization can be prevented, the requirement of thread standoff can be ensured, the product qualification ratio is improved, and the benefit is obvious.
Description
Technical field
The present invention relates to a kind of metal heat treatmet technology, particularly for the higher treatment process of correcting of joint of petroleum drill rod hardness value.
Background technology
Oil production be unable to do without oil drill rocker, and oil drill rocker is made of drill pipe sub and drill pipe body.The material of drill pipe sub is generally 4137H (37CrMnMo), and by the mechanical property analysis, when hardness value changed in HB293～331 scopes, along with the raising of hardness value, tensile strength, yield strength, Charpy-V impact power increased; When hardness value during greater than HB331, tensile strength improves, but yield strength and Charpy-V impact power descend.The comprehensive mechanical performance index descended when hardness value was too high, and joint plasticity descends, and fracture has only the comprehensive mechanical performance height just can be applicable to underground drilling easily.During existing drill pipe sub was produced, often hardness value was higher, and traditional treatment process one is to scrap, and the 2nd, carry out temper.Joint is directly carried out temper, though can reduce hardness, bringing new problem is screw thread tooth easy deformation on the joint, and joint surface can produce Decarburized layer, cause joint screw thread closely apart from defective, the finished product still are defective, cause heavy losses.
Summary of the invention
The technical problem to be solved in the present invention provides and a kind ofly can reduce higher hardness value, can guarantee screw thread again closely apart from requiring, thereby improves the petroleum drilling rod joint higher hardness number treating process of product percent of pass.
Technical scheme of the present invention is: to the screw thread and the trim electro-coppering of drill pipe sub, drill pipe sub is lifted up into carry out tempering in the tempering stove more earlier, the control tempering temperature is 630 ℃～680 ℃, and insulation 100～140min hangs out subsequently and is water-cooled to normal temperature.
Another kind of technical scheme is: drill pipe sub is put into carries out pickling removal phosphate coating in the pickling tank earlier, then taking-up cleans up; To the screw thread and the trim electro-coppering of drill pipe sub, drill pipe sub is lifted up into carry out tempering in the tempering stove then again, the control tempering temperature is 630 ℃～680 ℃, and insulation 100～140min hangs out subsequently and is water-cooled to normal temperature.
In the such scheme, during to the drill pipe sub tempering, 650 ℃ of preferred tempering temperatures, insulation 120min.
Because of the density of fine copper and thermal conductivity than iron height, after the screw thread of joint and trim are electroplated fine copper, can play the provide protection of close coating; and enhancing thermal conduction, so just can prevent the distortion of screw thread tooth, can not produce the surface decarburization layer; thereby guarantee that screw thread closely apart from requiring, improves product percent of pass.For the surface joint of phosphate coating is arranged, remove phosphate coating earlier, can guarantee the copper facing effect.Adopt treatment process of the present invention,, satisfy export requirement, obtain the coml immense success for joint manufacturing enterprise retrieves the financial loss of millions of units every year.
Embodiment
Example one: the surface there is not the drill pipe sub of phosphate coating, material 4137H (37CrMnMo), hardness value is put in the copper-bath plating tank greater than HB331, and technology makes joint screw thread and trim position plating one deck fine copper routinely; Then joint is lifted up into and carried out tempering in the tempering stove, the control tempering temperature is 650 ℃, and insulation 120min hangs out subsequently and is water-cooled to normal temperature.
Example two: the surface there is the drill pipe sub of phosphate coating, material 4137H (37CrMnMo), hardness value is greater than HB331, is put into earlier to carry out pickling in the pickling tank and remove phosphate coating, and it is clean with flushing with clean water to take out the back, carries out copper facing and temper by the method for example one again.
Through above processing, the hardness value of drill pipe sub in HB293～331 scopes, comprehensive mechanical performance height, and can not produce joint screw thread tooth distortion and surface decarburization phenomenon.
Claims (4)
1, a kind of petroleum drilling rod joint higher hardness number treating process, it is characterized in that screw thread and the trim electro-coppering of elder generation, drill pipe sub lifted up into carry out tempering in the tempering stove again that the control tempering temperature is 630 ℃～680 ℃ to drill pipe sub, insulation 100～140min hangs out subsequently and is water-cooled to normal temperature.
2, by the described petroleum drilling rod joint higher hardness number treating process of claim 1, when it is characterized in that to the drill pipe sub tempering, 650 ℃ of control tempering temperatures, insulation 120min.
3, a kind of petroleum drilling rod joint higher hardness number treating process is characterized in that earlier drill pipe sub being put into and carries out pickling removal phosphate coating in the pickling tank, then takes out to clean up; To the screw thread and the trim electro-coppering of drill pipe sub, drill pipe sub is lifted up into carry out tempering in the tempering stove then again, the control tempering temperature is 630 ℃～680 ℃, and insulation 100～140min hangs out subsequently and is water-cooled to normal temperature.
4, by the described petroleum drilling rod joint higher hardness number treating process of claim 3, when it is characterized in that to the drill pipe sub tempering, 650 ℃ of control tempering temperatures, insulation 120min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510095675XA CN100351404C (en) | 2005-11-24 | 2005-11-24 | Petroleum drilling rod joint higher hardness number treating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510095675XA CN100351404C (en) | 2005-11-24 | 2005-11-24 | Petroleum drilling rod joint higher hardness number treating process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1775963A CN1775963A (en) | 2006-05-24 |
| CN100351404C true CN100351404C (en) | 2007-11-28 |
Family
ID=36765681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510095675XA Expired - Fee Related CN100351404C (en) | 2005-11-24 | 2005-11-24 | Petroleum drilling rod joint higher hardness number treating process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100351404C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452491B (en) * | 2013-09-17 | 2015-04-22 | 刘岩 | Production process of drilling tubing and casing for oilfields |
| CN105203371A (en) * | 2015-10-21 | 2015-12-30 | 浙江迪特高强度螺栓有限公司 | Decarburization and recarburization determination method for bolt under quenched state |
| CN112708733A (en) * | 2020-12-16 | 2021-04-27 | 无锡华信石油机械有限公司 | Processing technology of petroleum drill rod joint |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108125A (en) * | 1985-11-05 | 1987-05-06 | 武汉地质学院 | Hard and compact " skid " stratum cold galvanising diamond Special drilling bit and cold galvanising composite sheet oil bit |
| CN2081843U (en) * | 1990-11-10 | 1991-07-31 | 内蒙古机电设计研究所 | Copperplating equipment for screw thread of petroleum drilling pipes |
-
2005
- 2005-11-24 CN CNB200510095675XA patent/CN100351404C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108125A (en) * | 1985-11-05 | 1987-05-06 | 武汉地质学院 | Hard and compact " skid " stratum cold galvanising diamond Special drilling bit and cold galvanising composite sheet oil bit |
| CN2081843U (en) * | 1990-11-10 | 1991-07-31 | 内蒙古机电设计研究所 | Copperplating equipment for screw thread of petroleum drilling pipes |
Non-Patent Citations (1)
| Title |
|---|
| 提高钻杆接头调质热处理质量的途径 无锡钻探工具厂技术组.探矿工程，第4期 1978 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1775963A (en) | 2006-05-24 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Shuguang Petroleum Drilling Equipment Co.,Ltd. Assignor: JIangsu Shuguang Group Co., Ltd. Contract fulfillment period: 2007.12.1 to 2014.11.30 Contract record no.: 2009320001294 Denomination of invention: Petroleum drilling rod joint higher hardness number treating process Granted publication date: 20071128 License type: Exclusive license Record date: 2009.7.29 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.12.1 TO 2014.11.30; CHANGE OF CONTRACT Name of requester: JIANGSU SHUGUANG PETROLEUM DRILLING EQUIPMENT CO., Effective date: 20090729 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071128 Termination date: 20181124 |
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| CF01 | Termination of patent right due to non-payment of annual fee |