CN1959059A - Sucker rod in super II level - Google Patents
Sucker rod in super II level Download PDFInfo
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- CN1959059A CN1959059A CN 200610114693 CN200610114693A CN1959059A CN 1959059 A CN1959059 A CN 1959059A CN 200610114693 CN200610114693 CN 200610114693 CN 200610114693 A CN200610114693 A CN 200610114693A CN 1959059 A CN1959059 A CN 1959059A
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Abstract
The present invention relates to a super-H-grade pumping rod. The chemical components of steel material for making said pumping rod include (by wt%) 0.07%-0.13% of carbon, 0.40%-1.20% of silicone, 1.60%-2.2% of manganese, 0.60%-1.70% of chrome, 0.20%-0.40% of molybdenum, nickel content is less than or equal to 0.3%, copper content is less than or equal to 0.20%, phosphorus content is less than or equal to 0.025%, sulfur content is less than or equal to 0.25% and the rest is iron. Said pumping rod successively is undergone the processes of quenching treatment and tempering treatment, its quenching temperature is 900 deg.C-950 deg.C, heat-insulating for 1 hr, then making tempering treatment, tempering temperature is 330 deg.C-370 deg.C, heat-insulating for 2 hr, then air cooling.
Description
Technical field
The invention belongs to the oil equipment field, be specifically related to a kind of sucker rod in super II level.
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, small investment, and convenient management, advantage such as compliance 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 reciprocating pump pull bar of special length, add and bearing fluctuating 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 condition of work.
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, improves intensity by Technology for Heating Processing and makes the H grade pumping rod, and its reliability of products is not high, and in the face of the continuous increase of oil field to the load requirement, the H grade pumping rod can not satisfy fully produces needs.Though have some superpower structural alloy steels can reach the level that tensile strength surpasses the H level at present,, can't satisfy the manufacturing of sucker rod because its fatigue strength can't reach the requirement of petroleum industry.
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 it is lower to develop a kind of cost of production, tensile strength surpasses the sucker rod of present maximum intensity rank H level to satisfy the load requirement of increasing day by day in the oil field development, and very important meaning is arranged.
Summary of the invention
The purpose of this invention is to provide a kind of mechanical property and be higher than present existing standard maximum intensity rank H level, fatigue strength also reaches the sucker rod in super II level of petroleum industry standard.
For achieving the above object, the present invention adopts following design scheme: a kind of sucker rod in super II level is characterized in that, the used steel chemical composition of sucker rod according to percentage by weight 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 are iron; Through quenching and tempering heat treatment, the heat-treatment quenching temperature of sucker rod is 900 ℃～950 ℃ to sucker rod, is incubated 1 hour, carries out water cooling then, carries out temper more successively, and 330 ℃～370 ℃ of temperatures are incubated air cooling after 2 hours.
Each constituent content is definite as follows in the used steel of sucker rod:
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 essential 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 quenching degree of steel, and can make steel in cooling procedure 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.
Advantage of the present invention is:
1, sucker rod in super II level tensile strength of the present invention surpasses present highest level H level, and fatigue strength reaches the petroleum industry standard, is applicable in the oil field development load is required very high working environment.2, use sucker rod in super II level of the present invention can replace other sucker rod of present low intensity level, thereby reduce the roofbolt load of oil well, reduce the oil pumper power consumption.3, the manufacture process of sucker rod in super II level of the present invention is similar to the manufacture process of present sucker rod, and does not need to increase extra equipment input, and the large tracts of land that is fit to product is promoted.
The specific embodiment
A kind of sucker rod in super II level, it is characterized in that the used steel chemical composition of sucker rod according to percentage by weight 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; Through quenching and tempering heat treatment, the heat-treatment quenching temperature of sucker rod is 900 ℃～950 ℃ to sucker rod, is incubated 1 hour, carries out water cooling then, carries out temper more successively, and 330 ℃～370 ℃ of temperatures are incubated air cooling after 2 hours.
The manufacture process of sucker rod in super II level of the present invention is as follows:
At first: press column weight amount percentage and get each component, wherein: 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; Manufacturing the sucker rod round steel by following technology then: 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.
Secondly, the sucker rod round steel is finished the manufacturing of sucker rod in super II level through operations such as cold-drawn, alignment, jumping-up, heat treatment, screw thread processing, polishings.
Embodiment one, a kind of sucker rod in super II level, and it with each chemical component weight percentage in the 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.
The preparation method of sucker rod in super II level of the present invention comprises the following steps:
One, sucker rod in super II level is with the preparation of steel: smelt in electric furnace according to the raw material that above-mentioned prescription is obtained, molten steel is poured into the steel ingot of 560kg.Become 65mm * 65mm through Φ 650X1 with Φ 650X3 mill milling
2Square embryo after, adopt cooling controlling and rolling controlling process by Φ 400X1 and Φ 250X5 tandem mill again: 1090 ℃ of heating-up temperatures, 900 ℃ of finishing temperatures, 3 ℃/s of cooling velocity becomes Φ 28 round steel with billet rolling, is cut into 7 meters scales, air cooling gets final product to room temperature.
Two, the cold-drawn of sucker rod in super II level and alignment and jumping-up: the low-alloy structural Steel Bar During that obtains is arrived oil pumping polish rod full-length 7.52m with the drawbench cold-drawn, utilize the GJ-A type sucker rod straightener of Huludao Bohai Petroleum Machinery Plant to carry out alignment again, utilize the YSG-200 hydraulic double cylinder upsetter of the west of Liaoning, Huludao City oil facility factory to carry out the end jumping-up at body of rod two ends.Finish the basic sharp processing of sucker rod.
Three, the heat treatment of sucker rod in super II level: sucker rod is put into heating furnace, be warmed up to 900 ℃～950 ℃, be incubated 1 hour, then polished rod being put into temperature cooled off 1 hour in 18 ℃～22 ℃ pond, again polished rod is put into heating furnace once more afterwards, be warmed up to 330 ℃～370 ℃, be incubated 2 hours, take out then and be placed on cooling naturally in the air.
Four, processing of the screw thread of sucker rod in super II level and polishing: the sucker rod that will cool down naturally fully uses the C616 lathe that screw thread processing is carried out at body of rod two ends.Use the 200# abrasive band that polishing grinding is carried out on body of rod surface with belt grinder afterwards, reach the body of rod dimensional requirement and the fineness requirement of sucker rod industry standard, promptly obtain sucker rod in super II level.
Embodiment two, a kind of sucker rod in super II level, and it with each chemical component weight percentage in the 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.The preparation method of sucker rod in super II level of the present invention is with embodiment one.
Embodiment three, a kind of sucker rod in super II level, and it with each chemical component weight percentage in the 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.The preparation method of sucker rod in super II level of the present invention is with embodiment one.
Embodiment four, a kind of sucker rod in super II level, and it with each chemical component weight percentage in the 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.The preparation method of sucker rod in super II level of the present invention is with embodiment one.
The mechanical property of each embodiment of sucker rod in super II level sees Table one.
The mechanical property of each embodiment of table one sucker rod in super II level
| Tensile strength sigma bMPa | Yield strength σ bMPa | Elongation rate δ s% | Contraction percentage of area Ψ % | Ballistic work A kJ | Fatigue strength σ 0.1 | |
| SY/T5029-2003 H grade pumping rod standard SY/T6272-1997 sucker rod fatigue strength standard | 966～1136 | 〉=865 | 〉=10 | 〉=50 | 〉=58.8 | Under the 540MPa sinusoidal wave load during load ratio R=0.1, circulation cycle 〉=1 * 10 6Inferior. |
| Embodiment one | 1430 | 997 | 15 | 58.5 | 133 | 3.821 * 10 6 |
| Embodiment two | 1490 | 1012 | 16 | 59 | 143 | 4.714 * 10 6 |
| Embodiment three | 1510 | 1013 | 18.5 | 61.5 | 140 | 4.622 * 10 6 |
| Embodiment four | 1480 | 1002 | 15.5 | 57 | 139 | 3.735 * 10 6 |
Claims (1)
1, a kind of sucker rod in super II level, it is characterized in that the used steel chemical composition of sucker rod according to percentage by weight 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; Through quenching and tempering heat treatment, the heat-treatment quenching temperature of sucker rod is 900 ℃～950 ℃ to sucker rod, is incubated 1 hour, carries out water cooling then, carries out temper more successively, and 330 ℃～370 ℃ of temperatures are incubated air cooling after 2 hours.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610114693 CN1959059A (en) | 2006-11-21 | 2006-11-21 | Sucker rod in super II level |
| CNA2007101880070A CN101187294A (en) | 2006-11-21 | 2007-11-21 | Super H grade pumping rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610114693 CN1959059A (en) | 2006-11-21 | 2006-11-21 | Sucker rod in super II level |
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| Publication Number | Publication Date |
|---|---|
| CN1959059A true CN1959059A (en) | 2007-05-09 |
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| CN 200610114693 Pending CN1959059A (en) | 2006-11-21 | 2006-11-21 | Sucker rod in super II level |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206828A (en) * | 2011-05-20 | 2011-10-05 | 大庆高新区北油创业科技有限公司 | Treatment process for improving comprehensive properties by alloying surface of sucker rod |
| CN109487175A (en) * | 2018-11-22 | 2019-03-19 | 浙江睿智钢业有限公司 | A kind of high-strength corrosion-resisting sucker rod and its preparation process |
| 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 |
-
2006
- 2006-11-21 CN CN 200610114693 patent/CN1959059A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206828A (en) * | 2011-05-20 | 2011-10-05 | 大庆高新区北油创业科技有限公司 | Treatment process for improving comprehensive properties by alloying surface of sucker rod |
| CN102206828B (en) * | 2011-05-20 | 2013-05-08 | 大庆高新区北油创业科技有限公司 | Treatment process for improving comprehensive properties by alloying surface of sucker rod |
| CN109487175A (en) * | 2018-11-22 | 2019-03-19 | 浙江睿智钢业有限公司 | A kind of high-strength corrosion-resisting sucker rod and its preparation process |
| CN109487175B (en) * | 2018-11-22 | 2020-01-10 | 浙江睿智钢业有限公司 | High-strength corrosion-resistant sucker rod and preparation process thereof |
| 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 |
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