CN102212751A - Steel for high-strength petroleum casing pipe used in heavy oil thermal recovery well and manufacturing method thereof - Google Patents
Steel for high-strength petroleum casing pipe used in heavy oil thermal recovery well and manufacturing method thereof Download PDFInfo
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- CN102212751A CN102212751A CN2011101486600A CN201110148660A CN102212751A CN 102212751 A CN102212751 A CN 102212751A CN 2011101486600 A CN2011101486600 A CN 2011101486600A CN 201110148660 A CN201110148660 A CN 201110148660A CN 102212751 A CN102212751 A CN 102212751A
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Abstract
The invention relates to steel for a high-strength petroleum casing pipe used in a heavy oil thermal recovery well and a manufacturing method thereof. The steel comprises the following chemical components in percentage by weight: 0.20-0.35% of C, 0.15-0.35% of Si, 1.10-2.50% of Mn, not more than 0.018% of P, not more than 0.003% of S, 0-0.40% of Cr, 0.005-0.10% of Ti, 0.005-0.10% of Nb, 0.005-0.05% of V, 0.10-0.30% of Ni, 0.05-0.60% of Mo and the balance of Fe and unavoidable trace impurities. The manufacturing method comprises the following steps: pre-treating molten iron; carrying out converter steelmaking; refining in a ladle furnace (LF); casting a plate blank; finishing a steel billet; warehousing and inspecting; heating in a heating furnace; carrying out controlled rolling; carrying out controlled cooling; coiling; and inspecting and warehousing. The high-strength petroleum casing pipe made of the hot rolled steel coils has the advantages of stable mechanical properties and excellent welding performances, thus meeting high-temperature service performance indexes.
Description
Technical field
The present invention relates to a kind of high strength petroleum casing steel and manufacture method thereof, particularly a kind of thick oil thermal extraction high strength petroleum casing steel and manufacture method thereof.
Background technology
Viscous crude is the heavy crude of a kind of viscosity height, mobile difference.In the world, from the sixties in 20th century to the nineties, both at home and abroad the Development Practice of heavy crude reservoir proves that heat extraction by steam injection (comprising steam stimulation and steam flood) is the most effective, topmost development technique.At present, what generally adopt is the method exploitation of single well stimulation steam treatment, and the medial temperature of steam treatment is about 320 ℃.In the heavy crude heat extraction process, sleeve pipe periodically bears higher drawing-action of compressive stress, can cause casing failure (or the slippage that is threaded), distortion, and this is the major cause of thermal recovery well sleeve pipe damage just.According to pertinent data statistics, the cover loss rate average out to of thick oil thermal extraction is more than 30%, and local block reaches 70%, first of the row sleeve in oil field spoilage.
At present, what domestic most of oil-field thick-oil thermal recovery was used is weldless steel tube, and Tianjin Steel Pipe Corp. applies for a kind of thick oil thermal extraction medium tenacity petroleum casing pipe and production method thereof, and application number is 01118706.9.It adopts the Cr-Mo system development to go out weldless steel tube, and guarantees telescopic intensity and toughness through subsequent heat treatment, and steel grades is C=0.20-0.30wt%; Si=0.15-0.30wt%; Mn=0.60-1.10wt%; P≤0.02wt%; S≤0.015wt%; Ni≤0.30wt%; Cr=0.40-1.20wt%; Mo=0.060-0.20wt%; Cu≤0.30wt%.Baoshan Iron ﹠ Steel Co., Ltd applies for a kind of oil cover height and production method thereof, and application number is 200910048201.8.It adopts the Cr-Mo system development that contains W, Co to go out weldless steel tube, and guarantees telescopic intensity and toughness through subsequent heat treatment, and steel grades is C=0.20-0.35wt%; Si=0.15-0.45wt%; Mn=0.20-1.50wt%; Cr=0.15-5.55wt%; V=0.05-0.20wt%; Ti=0.005-0.05wt%; Nb=0.005-0.05wt%; Al=0.001-0.05wt%; Mo=0-0.60wt%; W=0-0.6%; Ni=0-0.2wt%; Cu=0-0.2wt%; Co=0-0.30wt%; Ca=0-0.005wt%.
Compare with traditional weldless steel tube, adopt the thick oil thermal extraction of ERW welding technique manufacturing to have the advantage that wall thickness is even, dimensional precision is high, circularity is good and cheap with the high strength petroleum sleeve pipe, anti-crowded ruining with resistance to compression burst ability with the high 10-15% of grade of steel seamless casing when underground military service.
Shengli Oil Field has more rich viscous crude resource, main in the past common N80, the P110 sleeve pipe of using, and the cover loss rate of thick oil thermal extraction surpasses 30%.Characteristics according to Shengli Oil Field, analyze the principal mode that this oil-field thick-oil thermal recovery well sleeve pipe damages by inquiry, specialized designs has been developed a kind of thick oil thermal extraction specialized barrel P110H (the P100 petroleum casing pipe belongs to API SPEC 5CT standard, and H represents thermal recovery) that is fit to this oil field applying working condition.On probation and achieving success in the Shengli Oil Field thick oil thermal extraction.
Summary of the invention
The purpose of this invention is to provide a kind of thick oil thermal extraction high strength petroleum casing steel and production method thereof, overcome the shortcoming and defect of prior art.The petroleum casing pipe that suitable thick oil thermal extraction is used, Heat stability is good.
Technical solution of the present invention is: a kind of thick oil thermal extraction high strength petroleum casing steel, it is characterized in that, chemical component weight per-cent is: C:0.20-0.35wt%, Si:0.15-0.35wt%, Mn:1.10-2.50wt%, P :≤0.018wt%, S :≤0.003wt%, Cr:0-0.40wt%, Ti:0.005-0.10wt%, Nb:0.005-0.10wt%, V:0.005-0.05wt%, Ni:0.10-0.30wt%, Mo:0.05-0.60wt%, other are Fe and inevitable trace impurity.
Below be petroleum casing pipe of the present invention each chemical ingredients effect and specify:
C: the strengthening element that steel grade is most economical, the most basic, significantly improve firm intensity by solution strengthening and precipitation strength, tensile strength especially, but the increase of C content significantly reduces ductility, toughness and the welding property of steel.Simultaneously, in order to alleviate shrend rimose susceptibility, patent C content target of the present invention is 0.20-0.35wt%.
Si: improve intensity and the high-temperature oxidation resistant and the acid resistance of sosoloid in the steel, but reduce the toughness and the plasticity of steel.Patent Si content target of the present invention is 0.15-0.35wt%.
Mn: solid solution improves the intensity and the hardening capacity of steel in ferrite, but influences the homogeneity of hot rolling microstructure simultaneously, and Mn can also form the manganese sulfide inclusion thing with S, influences material property.Patent Mn addition of the present invention is 1.10-2.50wt%.
P, S: be unavoidable impurities element in the steel, wish low as much as possible.The main harm of P is that segregation is serious; By external refining and Ca processing controls technology, S may be controlled to less than 30ppm on the one hand at present, can become sulfide inclusion on-deformable spherical on the one hand.The content of patent P of the present invention is controlled to be≤0.0018wt%; The content of S is controlled to be≤0.0030wt%.
Cr: at first Cr has significant solid solution strengthening effect, can improve the mechanical property and the corrosion resistance of steel; Secondly Cr can improve hardening capacity strongly, promotes carbide to form, and carbide precipitate improves the obdurability of steel during tempering, helps improving the hot strength of material.Patent Cr content of the present invention is 0-0.40wt%.
Ti: at first Ti can consolidate N, improves low-temperature impact toughness; Next is to form TiN, TiC can effectively hinder in soaking and the reheat process austenite crystal and grow up in the sheet billet continuous casting process; TiN improves the impelling strength of welded heat affecting zone in addition.Patent Ti addition of the present invention is 0.005-0.10wt%.
Nb: strong carbonitride forming element, can crystal grain thinning and have the effect of the reinforcement of washing out, help improving the hot strength of material, be the most basic interpolation element of modern micro-alloy high-strength steel.The addition of patent Nb of the present invention is 0.005-0.10wt%.
V: can crystal grain thinning, form carbide, improve the intensity of steel, improve toughness and improve temper resistance, but because its price is higher, so want prohibitive amount, patent V addition of the present invention is 0.005-0.05wt%.
Ni: be austenite former, can improve the hardening capacity of steel, improve the low-temperature impact toughness of steel simultaneously.But, consider to reduce its usage quantity from the angle that reduces cost because the market value of Ni is higher as far as possible.Patent Ni addition of the present invention is 0.10-0.30wt%.
Mo: strong carbonitride forming element, improve the hardening capacity of steel, can effectively improve the temper resistance of steel, the carbide that washes out during tempering helps improving the intensity of steel.Patent Mo addition of the present invention is 0.05-0.60wt%.
A kind of thick oil thermal extraction of the present invention manufacture method of high strength petroleum casing steel, technology is:
1) process for making route: hot metal pretreatment → converter steelmaking → LF stove refining → slab cast → steel billet finishing → warehouse-in, LF refining are carried out Ca and are handled inclusion modification.
2) steel rolling process route: process furnace heating → controlled rolling → controlled chilling → curl → check, warehouse-in, Heating temperature: 1220-1280 ℃, roughing final temperature: 1000-1060 ℃, finish rolling final temperature: 840-880 ℃, the finish rolling total deformation is greater than 75%, coiling temperature: 580-640 ℃.
The oil casing pipe steel hot-rolled sheet coil mechanical property requirements of producing according to production method of the present invention is as follows:
1) tensile property
Rt0.5:420-650Mpa, Rm 〉=650Mpa, A% 〉=22, yield tensile ratio≤0.88.
2) 180 ° of horizontal d=2a cold bending tests do not ftracture.
3) hardness test: HV10≤280.
4) metallographic structure: grain fineness number is 10 grades or thinner.
The Nb-V-Ti that the present invention produces is a microalloy high-strength oil casing pipe steel hot-rolled coil, by the microalloy strengthening mechanism, finish in conjunction with follow-up tubulation and to modulate thermal treatment, can reach thick oil thermal extraction high strength petroleum telescopic technical qualification requirement, when guaranteeing that the sleeve pipe obdurability requires, reduce the manpower and materials cost, improved the production efficiency and the market competitiveness.
Description of drawings
Fig. 1: a kind of thick oil thermal extraction high strength petroleum casing steel and 350 ℃ of drawing by high temperature curves of production method thereof
Metallographic structure after a kind of thick oil thermal extraction usefulness high strength petroleum casing steel of Fig. 2 and the thermal treatment of production method steel pipe thereof
Embodiment
Operational path: hot metal pretreatment → converter steelmaking → LF stove refining → slab cast → steel billet finishing → warehouse-in, check → process furnace heating → controlled rolling → controlled chilling → batch → check, put in storage.
Actual smelting chemical composition is as shown in table 1, and concrete steel rolling process parameter is as shown in table 2, and table 3 is the mechanical property check result.
The high strength petroleum sleeve pipe P110H that adopts the present invention to produce is ferrite+pearlitic structure with the steel hot-rolled sheet coil metallographic structure, and grain fineness number is 11 grades, and band shape is 1.5 grades.
Adopt the present invention, produce 210 tons of high strength petroleum casing steels, mail to certain pipe factory and enter continuously shaped operation, under suitable bonding power, welding speed and amount of compression, carry out resistance welding (ERW), then sleeve pipe is modulated thermal treatment, performance is as shown in table 4.As can be seen, every indexs such as the heat treated casing strength of process reach the technical requirements of P110 in the API SPEC 5CT standard, and the test-results that obtains under the portion of hot treatment process has reached Q125 even Q140 rank.
Adopt the present invention, the high strength petroleum sleeve pipe P110H of production twists in through after ERW technology tubulation and the thermal treatment with steel hot-rolled sheet, carries out 350 ℃ of high temperature tension tests, and stress strain curve as shown in Figure 1.As can be seen, 350 ℃ of drawing by high temperature yield strengths (Rp0.2) are 841MPa, and tensile strength is 941MPa, and quality in kind satisfies the high temperature using property data.
Adopt the present invention, the high strength petroleum sleeve pipe P110H of production twists in through after ERW technology tubulation and the thermal treatment with steel hot-rolled sheet, and metallographic structure is evenly fine and close, is tempered sorbite, as shown in Figure 2.
According to user reflection, adopt the present invention, the high strength petroleum sleeve pipe P110H of production with the steel pipe after stable mechanical property, the welding use properties is good, is applied in the thick oil thermal extraction at present.
The simple declaration of subordinate list
The high-strength petroleum casing pipe P110H of table 1 steel chemical composition, wt%
The high-strength petroleum casing pipe P110H of table 2 steel hot-rolled sheet coil steel rolling process parameter
The high-strength petroleum casing pipe P110H of table 3 steel hot-rolled sheet coil mechanical property detected result
Mechanical property detected result after the modified thermal treatment of the high-strength petroleum casing pipe P110H of table 4
Claims (2)
1. a thick oil thermal extraction high strength petroleum casing steel is characterized in that chemical component weight per-cent is: C:0.20-0.35wt%, Si:0.15-0.35wt%, Mn:1.10-2.50wt%, P :≤0.018wt%, S :≤0.003wt%, Cr:0-0.40wt%, Ti:0.005-0.10wt%, Nb:0.005-0.10wt%, V:0.005-0.05wt%, Ni:0.10-0.30wt%, Mo:0.05-0.60wt%, other are Fe and inevitable trace impurity.
2. the manufacture method of an oil casing pipe steel as claimed in claim 1, technology is:
1) process for making route: hot metal pretreatment → converter steelmaking → LF stove refining → slab cast → steel billet finishing → warehouse-in, LF refining are carried out Ca and are handled inclusion modification;
2) steel rolling process route: process furnace heating → controlled rolling → controlled chilling → curl → check, warehouse-in, Heating temperature: 1220-1280 ℃, roughing final temperature: 1000-1060 ℃, finish rolling final temperature: 840-880 ℃, the finish rolling total deformation is greater than 75%, coiling temperature: 580-640 ℃.
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| CN2011101486600A CN102212751A (en) | 2011-06-03 | 2011-06-03 | Steel for high-strength petroleum casing pipe used in heavy oil thermal recovery well and manufacturing method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556084A (en) * | 2013-11-13 | 2014-02-05 | 江苏华菱锡钢特钢有限公司 | Oil sleeve steel ball and manufacturing process thereof |
| CN107620012A (en) * | 2017-09-22 | 2018-01-23 | 中国石油集团渤海石油装备制造有限公司 | A kind of low-carbon high-manganese steel alloy HFW expansion sleeves main pipe and its manufacture method |
| WO2019047587A1 (en) * | 2017-09-11 | 2019-03-14 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot continuous rolled steel coil for high collapse strength sew oil casing and production method therefor |
| CN114278792A (en) * | 2021-12-02 | 2022-04-05 | 杰森能源技术有限公司 | Stainless steel pipe and preparation method thereof |
| CN114959512A (en) * | 2022-06-20 | 2022-08-30 | 马鞍山钢铁股份有限公司 | Steel for high-strength welded casing for heavy oil thermal production well, production method of steel, and heat treatment method for high-strength welded casing for heavy oil thermal production well |
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| CN101413090A (en) * | 2008-11-28 | 2009-04-22 | 首钢总公司 | High-strength high-toughness X80 hot rolling coiled sheet for spiral buried arc welding and production method thereof |
| CN101629476A (en) * | 2009-08-05 | 2010-01-20 | 天津钢管集团股份有限公司 | High strength and high toughness petroleum casing pipe capable of bearing low temperature within -40 to -80 |
| CN101709433A (en) * | 2009-12-03 | 2010-05-19 | 崔永贵 | Steel tube with low temperature resistance and high strength and production method thereof |
| CN101775556A (en) * | 2009-12-30 | 2010-07-14 | 首钢总公司 | X65 hot-rolled coil for use in acidic environment and manufacturing method thereof |
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| CN101358316A (en) * | 2007-07-31 | 2009-02-04 | 辽阳石化机械设计制造有限公司 | Steel of large-sized high-pressure pipe member for oil gas conveying, steel pipe pipe fitting and weld material prepared by thereof |
| CN101413090A (en) * | 2008-11-28 | 2009-04-22 | 首钢总公司 | High-strength high-toughness X80 hot rolling coiled sheet for spiral buried arc welding and production method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556084A (en) * | 2013-11-13 | 2014-02-05 | 江苏华菱锡钢特钢有限公司 | Oil sleeve steel ball and manufacturing process thereof |
| WO2019047587A1 (en) * | 2017-09-11 | 2019-03-14 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot continuous rolled steel coil for high collapse strength sew oil casing and production method therefor |
| US11466333B2 (en) | 2017-09-11 | 2022-10-11 | Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. | Continuous hot rolled coil for high collapse-resistant sew petroleum casing and manufacturing method thereof |
| CN107620012A (en) * | 2017-09-22 | 2018-01-23 | 中国石油集团渤海石油装备制造有限公司 | A kind of low-carbon high-manganese steel alloy HFW expansion sleeves main pipe and its manufacture method |
| CN107620012B (en) * | 2017-09-22 | 2019-09-03 | 中国石油集团渤海石油装备制造有限公司 | A kind of low-carbon high-manganese steel alloy HFW expansion sleeve main pipe and its manufacturing method |
| CN114278792A (en) * | 2021-12-02 | 2022-04-05 | 杰森能源技术有限公司 | Stainless steel pipe and preparation method thereof |
| CN114959512A (en) * | 2022-06-20 | 2022-08-30 | 马鞍山钢铁股份有限公司 | Steel for high-strength welded casing for heavy oil thermal production well, production method of steel, and heat treatment method for high-strength welded casing for heavy oil thermal production well |
| CN114959512B (en) * | 2022-06-20 | 2023-09-08 | 马鞍山钢铁股份有限公司 | Steel for high-strength welded sleeve for thickened oil thermal recovery well, production method of steel and high-strength welded sleeve heat treatment method for thickened oil thermal recovery well |
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Application publication date: 20111012 |