CN101177763A - Super strength pumping rod steel - Google Patents
Super strength pumping rod steel Download PDFInfo
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- CN101177763A CN101177763A CNA2007101880085A CN200710188008A CN101177763A CN 101177763 A CN101177763 A CN 101177763A CN A2007101880085 A CNA2007101880085 A CN A2007101880085A CN 200710188008 A CN200710188008 A CN 200710188008A CN 101177763 A CN101177763 A CN 101177763A
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Abstract
The invention relates to an ultra strength draw oil pole steel, and the steel is used for manufacturing ultra strength draw oil pole. The compositions of the steel calculated in weight percentage are: carbon: 0.07 percent to 0.13 percent, silicon: 0.40 percent to 1.20 percent, manganese: 1.60 percent to 2.2 percent, chromium: 0.60 percent to 1.70 percent, molybdenum: 0.20 percent to 0.40 percent, nickel is less than or equal to 0.3 percent, Copper is less than or equal to 0.20 percent, P is less than or equal to 0.025 percent, Sulfur is less than or equal to 0.25 percent, and the rest is Fe. The fabrication technology of the steel is that: materials are blended according to above proportions, and the following processes are: electric furnace smelting - cast ingot - mill blooming - fault detection - rod and wire continuous mill rolling - cutting gauge - air cooling-final production. Heat processing technology is unnecessary for the steels produced with the technology, and an H grade ultra strength oil draw pole can be obtained by only machining. While the fabrication technology of the oil draw pole is simplified and the cost is reduced, the requirements on the increasing mechanical strength of oil draw poles caused by the increasing underground load in the latter period of oilfield development can be met.
Description
Technical field
The invention belongs to metal material field, be specifically related to a kind of petroleum industry steel for sucker rod.
Background technology
In petroleum industry, the oil pumper sucker rod pumping is a kind of artificial lift oil production method, and is simple with its equipment, less investment, and convenient management, advantage such as adaptability is strong is extensively adopted by each oil field both at home and abroad.Oil pumper, sucker rod and oil well pump are three chief components of sucker rod pumping equipment, wherein sucker rod is the important step of the oil pumper transmission of power being given downhole pump, come down to a kind of reciprocation pump pull bar of special length, add and bearing repeated load under the etching condition in various degree, totally unfavorable to the sucker rod working condition.Therefore, to be used for the manufacturing of sucker rod be the factor of overriding concern to the steel of selecting to be suitable for most the sucker rod working conditions.
Domestic and international existing sucker rod product is divided into C, K, D and H level from low to high according to performance rate.Along with the oil field progresses into latter period of oilfield development, oil well is deepened gradually, and requirements such as the intensity of sucker rod, toughness are also improved constantly.The 20CrMo steel is used in present sucker rod production more, and this sucker rod needs to quench and high tempering thermal treatment in process of production, and production link is many, the production cost height; This steel is mainly used in other sucker rods of low intensity level such as making D level, K level simultaneously, improves intensity by thermal treatment process and makes the H grade pumping rod, and its reliability of products is not high.
About 150,000 mouthfuls of present domestic oil well adopts about 120,000 mouthfuls of sucker rod pumping oil well, according to 2000 meters calculating of individual well average well depth, and about 2.4 hundred million meters of China's sucker rod consumption, the sucker rod consumption is huge.Therefore, if can use a kind of steel for sucker rod, do not need to heat-treat the intensity that the sucker rod that makes can reach the H level, will effectively reduce the production cost of sucker rod, significantly improve the reliability of H grade pumping rod, will very important meaning be arranged the exploitation of oil field low-consumption high-efficiency.
Summary of the invention
The purpose of this invention is to provide a kind of super-strength sucker rod steel, using this steel to make sucker rod does not need to heat-treat the requirement of strength that can reach the H level, has simplified production technique, has reduced production cost.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of super-strength sucker rod steel, it is characterized in that each component concentration weight percent of super-strength sucker rod steel is: carbon 0.07%～0.13%, silicon 0.40%～1.20%, manganese 1.60%～2.2%, chromium 0.60%～1.70%, molybdenum 0.20%～0.40%, nickel≤0.3%, copper≤0.20%, phosphorus≤0.025%, sulphur≤0.25%, surplus is an iron.
Each component concentration weight percent of super-strength sucker rod steel is: carbon 0.07%, and silicon 0.40%, manganese 1.60%, chromium 0.60%, molybdenum 0.20%, nickel 0.3%, copper 0.20%, phosphorus 0.025%, sulphur 0.25%, surplus is an iron.
Each component concentration of super-strength sucker rod steel is by weight percentage: carbon 0.13%, and silicon 1.20%, manganese 2.2%, chromium 1.70%, molybdenum 0.40%, nickel 0.3%, copper 0.20%, phosphorus 0.025%, sulphur 0.25%, surplus is an iron.
Each component concentration weight percent of super-strength sucker rod steel is: carbon 0.08%, and silicon 0.50%, manganese 1.70%, chromium 0.90%, molybdenum 0.25%, nickel 0.2%, copper 0.15%, phosphorus 0.02%, sulphur 0.20%, surplus is an iron.
Each component concentration weight percent of super-strength sucker rod steel is: carbon 0.11%, and silicon 1.10%, manganese 2.0%, chromium 1.50%, molybdenum 0.35%, nickel 0.27%, copper 0.17%, phosphorus 0.022%, sulphur 0.22%, surplus is an iron.
Steel for sucker rod among the present invention is by following technology manufacturing: that embryo → flaw detection → wire and rod continuous rolling machine left by electric furnace → ingot casting → milling train is rolling → cut scale → air cooling → become a useful person.
Each component concentration is definite as follows in the steel:
Carbon: the super-strength sucker rod steel metallographic structure among the present invention mainly is bainite, ferrite and small portion of residual austenite, carbides-free exists mutually in the tissue, to avoid the pernicious effect of carbide to the bainitic steel mechanical property, thereby improve the mechanical property of bainitic steel, therefore the content of carbon is unsuitable too high, and carbon content is controlled in 0.07%～0.13% the scope among the present invention.
Molybdenum: molybdenum element does not almost influence bainite transformation because can effectively postpone high temperature transformation, so molybdenum is a bainite non-hardened and tempered steel alloying element commonly used.But costing an arm and a leg of molybdenum is from consider that economically reduce the content of molybdenum when design, molybdenum content is controlled in 0.20%～0.40% scope among the present invention as far as possible.
Manganese: manganese element mainly improves intensity by the solid solution carbon amount of solution strengthening effect, increase bainite, ferrite matrix.In addition, manganese and molybdenum are similar, can effectively postpone high temperature transformation.And manganese is quite cheap alloying element, has therefore added Gao Meng to reduce the consumption of molybdenum in steel.Manganese content is controlled in 1.60%～2.2% scope among the present invention.
Silicon: element silicon can hinder the formation of carbide strongly, makes steel not separate out (perhaps seldom separating out) carbide in the bainitic transformation process.In addition, silicon also is the principal element that improves yield strength.But excessive silicon reduces plasticity.The content of silicon is controlled in 0.40%～1.20% scope among the present invention.
Nickel: a spot of nickel element and manganese combine promptly can make steel easily produce bainite structure.The price of nickel is very high, considers from economic angle, uses nickel element less as far as possible.Among the present invention, nickel content≤0.3%
Chromium: the chromium element can improve the hardening capacity of steel, and can make steel in process of cooling the perlitic transformation district and bainite transformation distinguish from, help forming bainite.The content of chromium is controlled in 0.60%～1.70% the scope among the present invention.
The invention has the advantages that: 1, use super-strength sucker rod steel of the present invention to make that sucker rod does not need to quench and high-temperature tempering process can reach the requirement of strength of H level, simplified production process, improve production efficiency, and reduced the input of the Equipment for Heating Processing of sucker rod producer.2, super-strength sucker rod steel of the present invention is applicable to and makes H grade super strength sucker rod, satisfies latter period of oilfield development down-hole load and increases day by day, the sucker rod mechanical strength is required the requirement that improves day by day.
Embodiment
Embodiment one, and a kind of super-strength sucker rod steel is characterized in that, each component concentration weight percent of super-strength sucker rod steel is: carbon 0.07%, silicon 0.40%, manganese 1.60%, chromium 0.60%, molybdenum 0.20%, nickel 0.3%, copper 0.20%, phosphorus 0.025%, sulphur 0.25%, surplus is an iron.
Embodiment two, and a kind of super-strength sucker rod steel is characterized in that, each component concentration weight percent of super-strength sucker rod steel is: carbon 0.13%, silicon 1.20%, manganese 2.2%, chromium 1.70%, molybdenum 0.40%, nickel 0.3%, copper 0.20%, phosphorus 0.025%, sulphur 0.25%, surplus is an iron.
Embodiment three, and a kind of super-strength sucker rod steel is characterized in that, each component concentration weight percent of super-strength sucker rod steel is: carbon 0.08%, silicon 0.50%, manganese 1.70%, chromium 0.90%, molybdenum 0.25%, nickel 0.2%, copper 0.15%, phosphorus 0.02%, sulphur 0.20%, surplus is an iron.
Embodiment four, and a kind of super-strength sucker rod steel is characterized in that, each component concentration weight percent of super-strength sucker rod steel is: carbon 0.11%, silicon 1.10%, manganese 2.0%, chromium 1.50%, molybdenum 0.35%, nickel 0.27%, copper 0.17%, phosphorus 0.022%, sulphur 0.22%, surplus is an iron.
Smelt in electric furnace according to this prescription, molten steel is poured into the steel ingot of 560kg.Become 65mmX65mm through Φ 650X1 with Φ 650X3 mill milling
2Square embryo after, after flaw detection, adopt cooling controlling and rolling controlling process by Φ 400X1 and Φ 250X5 continuous mill again: 1090 ℃ of Heating temperatures, 900 ℃ of finishing temperatures, 3 ℃/s of speed of cooling becomes Φ 30 round steel with billet rolling, is cut into 9 meters scales, air cooling gets final product to room temperature.
The steel that obtain are carried out the mechanical property test experience, the results are shown in Table one
The mechanical property of each embodiment of table one super-strength sucker rod steel
| Tensile strength sigma bMPa | Yield strength σ sMPa | Elongation δ s％ | Relative reduction in area ψ % | Ballistic work A kJ | |
| SY/T5029-2003 H grade pumping rod standard | 966～1136 | ≥865 | ≥10 | ≥50 | ≥58.8 |
| Embodiment one | 1024 | 901 | 11.5 | 54.5 | 96 |
| Embodiment two | 1107 | 933 | 14 | 62.5 | 95 |
| Embodiment three | 1092 | 938 | 15.5 | 64 | 96 |
| Embodiment four | 993 | 905 | 13.5 | 59.5 | 93 |
Claims (5)
1. super-strength sucker rod steel, it is characterized in that each component concentration weight percent of super-strength sucker rod steel is: carbon 0.07%～0.13%, silicon 0.40%～1.20%, manganese 1.60%～2.2%, chromium 0.60%～1.70%, molybdenum 0.20%～0.40%, nickel≤0.3%, copper≤0.20%, phosphorus≤0.025%, sulphur≤0.25%, surplus is an iron.
2. super-strength sucker rod steel according to claim 1, it is characterized in that each component concentration weight percent of super-strength sucker rod steel is: carbon 0.07%, silicon 0.40%, manganese 1.60%, chromium 0.60%, molybdenum 0.20%, nickel 0.3%, copper 0.20%, phosphorus 0.025%, sulphur 0.25%, surplus is an iron.
3. super-strength sucker rod steel according to claim 1, it is characterized in that each component concentration of super-strength sucker rod steel is by weight percentage: carbon 0.13%, silicon 1.20%, manganese 2.2%, chromium 1.70%, molybdenum 0.40%, nickel 0.3%, copper 0.20%, phosphorus 0.025%, sulphur 0.25%, surplus is an iron.
4. super-strength sucker rod steel according to claim 1, it is characterized in that each component concentration weight percent of super-strength sucker rod steel is: carbon 0.08%, silicon 0.50%, manganese 1.70%, chromium 0.90%, molybdenum 0.25%, nickel 0.2%, copper 0.15%, phosphorus 0.02%, sulphur 0.20%, surplus is an iron.
5. super-strength sucker rod steel according to claim 1, it is characterized in that each component concentration weight percent of super-strength sucker rod steel is: carbon 0.11%, silicon 1.10%, manganese 2.0%, chromium 1.50%, molybdenum 0.35%, nickel 0.27%, copper 0.17%, phosphorus 0.022%, sulphur 0.22%, surplus is an iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101880085A CN101177763A (en) | 2006-11-21 | 2007-11-21 | Super strength pumping rod steel |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610114692 CN1952200A (en) | 2006-11-21 | 2006-11-21 | Super-strength sucker rod steel |
| CN200610114692.8 | 2006-11-21 | ||
| CNA2007101880085A CN101177763A (en) | 2006-11-21 | 2007-11-21 | Super strength pumping rod steel |
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| Publication Number | Publication Date |
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| CN101177763A true CN101177763A (en) | 2008-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007101880085A Pending CN101177763A (en) | 2006-11-21 | 2007-11-21 | Super strength pumping rod steel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105369149A (en) * | 2015-12-04 | 2016-03-02 | 中国石油天然气集团公司 | Steel for H-level surface aluminizing modified sucker rod and manufacturing method of rod body of sucker rod |
| CN110273101A (en) * | 2019-06-14 | 2019-09-24 | 首钢集团有限公司 | A kind of H grade pumping rod and preparation method thereof |
| CN114892103A (en) * | 2022-03-24 | 2022-08-12 | 盐城市联鑫钢铁有限公司 | 20CrMo round steel and production process method |
-
2007
- 2007-11-21 CN CNA2007101880085A patent/CN101177763A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105369149A (en) * | 2015-12-04 | 2016-03-02 | 中国石油天然气集团公司 | Steel for H-level surface aluminizing modified sucker rod and manufacturing method of rod body of sucker rod |
| CN110273101A (en) * | 2019-06-14 | 2019-09-24 | 首钢集团有限公司 | A kind of H grade pumping rod and preparation method thereof |
| CN114892103A (en) * | 2022-03-24 | 2022-08-12 | 盐城市联鑫钢铁有限公司 | 20CrMo round steel and production process method |
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