高强度抗硫化氢应力腐蚀油套管的研制

文章主要叙述了抗硫化氢腐蚀性能的影响因素和控制要点。结合包钢的生产实践,生产出了具有自主知识产权的抗硫化氢应力腐蚀套管,产品具有良好的抗H2S腐蚀性能。经使用证明,产品性能良好达到国内同类产品的水平。     

BT95SS高强度抗硫化氢腐蚀石油套管的研制

文章主要介绍了石油套管抗硫化氢应力腐蚀性能的影响因素和控制要点。为满足高强度抗硫化氢腐蚀套管的使用要求,选用Cr、Mo、Ti为主要抗腐蚀合金元素,严格控制S、P的含量,通过微合金元素合理优化,生产出了具有自主知识产权的抗硫化氢石油套管,0℃冲击吸收功达到100 J以上,使套管在具有高强度的同时也具有很高的韧性,强韧性搭配合理,产品具有良好的抗硫化氢腐蚀性能。     

低碳-低锰系油井套管用钢抗硫化氢应力腐蚀开裂性能

 对621MPa(90ksi)级抗硫化氢腐蚀油井套管用钢的合金设计、热处理工艺以及组织和性能关系进行了研究,分别设计了0.08C-0.8Mn和0.20C-0.8Mn 2种低碳-低锰试验钢,并重点研究了经调质处理后试验钢的位错、析出物和碳化物对SSCC性能的影响。研究结果表明,采用低碳-低锰,结合Nb、V、Ti和B的微合金设计,通过适当的调质热处理工艺可以获得优良的力学性能、韧性和抗硫化氢应力腐蚀开裂性能,满足相关标准的要求。研究结果还表明,不共平面的位错群、细小的析出物以及弥散的高球化率碳化物,可以使钢具有很好的抗硫化氢应力腐蚀开裂性能。     

抗硫化氢应力腐蚀油井管及其制造方法

专利号:ZL200510029218.0专利权人:宝山钢铁股份有限公司发明人:殷光虹张忠铧郭金宝孙元宁抗硫化氢应力腐蚀油套管,其成分质量百分比为:wC:0.20%～0.32%、wSi:0.1%～0.5%、wMn:0.4%～1.0%、wCr:0.1%～0.8%、wMo:0.5%～1.2%、wV:0.01%～0.10%、wNb:0.01%～0.1%0、wP≤0.015%、wS≤0.010%、余Fe和不可避免的杂质。本发明的制造方法包括,经电弧炉冶炼、炉外精炼、真空脱气和钙处理后,连铸成圆坯;再经热轧制成无缝钢管;进行调质热处理,热处理淬火温度在820～1000℃之间,保温30min以上,钢管内外同时整体水淬;回火温度650℃以上,保温60min以上,空冷;热矫直温度480℃以上,经探伤、管加工制成油管或套管。本发明既可以保证钢管经整体淬火回火后,达到110ksi钢级的性能要求,也可保证在此强度下有很好的抗硫化氢应力腐蚀性能。抗硫化氢应力腐蚀油井管及其制造方法$宝山钢铁股份有限公司科技发展部     

110SS级别抗硫化氢应力腐蚀厚壁无缝钢管的开发

开发的110SS钢(/％:0.28 ～0.33C,0.20 ～0.30Si,0.60 ～ 1.00Mn,≤0.015P,≤0.005S,1.20 ～1.45Cr,0.65 ～0.85Mo,0.01 ～0.05Al,0.01 ～0.05Ti,0.01 ～0.05Nb,0.01 ～0.10V)Φ325 mm×55 mm厚壁...     

SSC抗硫化氢应力腐蚀试验方法的开发

文章通过对硫化氢基础特性及油套管硫化氢腐蚀机理的研究探讨,结合NACE TM0177-2005和ASTM A370标准要求,提出了符合企业生产要求的SSC抗硫化氢应力腐蚀试验方法。将该方法应用在现场生产硫化氢腐蚀专用油套管SSC检验过程中,取得良好的应用效果,为企业创造了较高的经济效益与社会效益。     

BT80SS抗H2S腐蚀石油套管的研制

根据化学元素对H2S应力腐蚀的影响,选用C,Mn,Cr和Mo为合金元素,控制S和P等有害元素的含量,同时加入RE;根据钢管的组织对抗H2S应力腐蚀的影响,采用淬火后高温回火的热处理制度,生产出了具有自主知识产权的抗H2S套管,该产品具有良好的耐H2S腐蚀性能。     

抗挤抗硫套管用CrMo钢在硫化氢介质中的电化学行为

测定了宝钢φ177.8×9.19 mm规格B110TS抗挤抗硫套管的抗挤抗硫性能,采用电化学测试技术研究了抗挤抗硫套管用CrMo钢在饱和硫化氢盐溶液的极化和析氢行为.通过TEM、XPS和SEM观察了微观组织及析出相,发现铜的添加能够改变钢的电化学行为,钢基体以及碳化物在硫化氢介质中的溶解行为是影响抗硫化氢腐蚀性能的重要因素,提出了这种材料在硫化氢介质中的腐蚀机制.     

3Cr抗CO2和H2S腐蚀系列油套管开发

CO2、H2S腐蚀是石油天然气开采过程中的主要腐蚀问题。文章在分析油井管CO2腐蚀行为和腐蚀特点的基础上，介绍了抗CO2、H2S腐蚀油套管的研制过程并开发出腐蚀性能良好的3Cr系列经济型油套管。文章重点介绍了80、95、110等不同钢级成品管的力学性能，抗CO2、H2S应力腐蚀开裂性能。运用SEM扫描电境、X光电子能谱仪、X射线衍射、体视显微镜等分析了钢经腐蚀后的表面腐蚀产物的组成、结构，并对Cr元素改善钢的抗CO2腐蚀行为及机理进行了分析。     

宝钢自主开发超级13Cr高抗腐蚀系列油套管

宝钢研究院和宝钢分公司钢管厂紧密合作，根据国内外油气田开采过程中腐蚀介质增多的现状。2006年开展了超级13Cr等高端耐腐蚀钢管系列产品研制，现已自主开发出具有宝钢自主知识产权的两个高抗CO2、H2S腐蚀钢种。     

低铬抗硫套管的H_2S/CO_2腐蚀行为研究

通过高温高压及H2S应力腐蚀开裂(SSC)实验,采用SEM、EDS、XRD和TEM技术,研究3Cr110S在模拟环境中的H2S/CO2腐蚀行为。结果表明:在模拟H2S/CO2高温高压腐蚀环境中,H2S腐蚀占主导作用,3Cr110S的均匀腐蚀速率为0.1272 mm/a,局部腐蚀轻微,试样表面腐蚀产物为FeS;在施加应力为72%、80%的最低屈服强度时,3Cr110S试样均未发生应力腐蚀开裂,具有良好的抗SSC性能;3Cr110S回火索氏体组织的条束之间位相差大,铬元素在晶界及晶内以粒状碳化物析出、位错纠结、弥散分布碳化物的位错定扎对SSC裂纹扩展起着良好的阻碍作用。     

螺旋焊管抗H2S应力腐蚀试验研究

通过对螺旋焊管抗H2S应力腐蚀的试验研究，提出了螺旋焊管抗H2S应力腐蚀的几种途径，并对我国在抗H2S应力腐蚀的研究方面提出了一些建议。     

Corrosion Behavior of 110S Tube Steel in Environments of High H2S and CO2 Content

 The corrosion behavior of the 110S tube steel in the environments of high H2S and CO2 content was investigated by using a high-temperature and high-pressure autoclave, and the corrosion products were characterized by scanning electron microscopy and X-ray diffraction technique. The results showed that all of the corrosion products under the test conditions mainly consisted of different types of iron sulfides such as pyrrhotite of Fe0. 95S, mackinawite of FeS0. 9, Fe0. 985S and FeS, and the absence of iron carbonate in the corrosion scales indicated that the corrosion process was controlled by H2S corrosion. The corrosion rate of the 110S steel decreased firstly and then increased with the rising of temperature. The minimum corrosion rate occurred at 110 ℃. When the H2S partial pressure PH2S below 9 MPa, the corrosion rate declined with the increase of PH2S. While over 9 MPa, a higher PH2S resulted in a faster corrosion process. With the increasing of the CO2 partial pressure, the corrosion rate had an increasing trend. The morphologies of the corrosion scales had a good accordance with the corrosion rates.     

Corrosion behavior of super 13Cr stainless steel in a H_2S and CO_2 environment

The corrosion behavior of 95 ksi grade super 13 Cr stainless steel in an environment consisting of H_2S and CO_2 was investigated.The results reveal that for both loading methods(constant load and four-point bending),local corrosion occurred on the surface of the samples tested at ambient temperature but was absent from the samples tested at high temperatures.The local corrosion was caused by the formation of pits at nonmetal inclusions; the pits were formed under the action of stress in an acidic environment, which was due to an acid solution.Subsequently, the corrosion extended along the direction of stress.The sensitivity of stress corrosion cracking increased because of the local corrosion.     

火驱采油套管的试制开发

根据火驱采油工作条件的特点,试制了复合添加Mo、W、V等合金元素的含Cr3%的火驱采油用BG80H-3Cr耐热套管。检测结果表明,所开发的产品在室温至450℃的使用温度范围内屈服强度均在API标准的N80钢级范围。在400℃加载250MPa的条件下未发生蠕变,550℃运行1万h的高温持久强度的理论值为169MPa。套管试样在550℃空气介质下的氧化速率为0.01g（/m2·h）,抗CO2腐蚀能力与普通N80套管相比提高11倍。     

Influence of Chromium on Mechanical Properties and CO2/H2S Corrosion Behavior of P110 Grade Tube Steel

Four kinds of P110 grade tube steels containing different chromium contents were designed to probe the in- fluence of Cr on the properties of tube steel. The microstrueture, mechanical properties and corrosion behavior of the four kinds of P110 grade tube steels were studied deeply and thoroughly. The analysis of the mechanical properties indicated that tensile strength and yield strength of the steel plates were improved, while transverse and longitudinal impact energy and elongation first increased and then decreased when Cr content rose. The impact energy and elonga tion reached the peak when Cr content was 1 ~. Cr precipitates were found only in 3 ~ Cr steel, with （Nb, Ti）（C, N） or Nb（C,N） as the core of precipitation and then grew up. The corrosion experiments demonstrated that the scales on the four steels had a two layer structure under the corrosion of CO2 and H2 S. The outer layer was mainly com- posed of FeS or FeS1 x and the inner layer consisted of FeCOa and Cr compounds. Cr was rich in the inner layer and the Cr content of the inner layer increased with the Cr content in matrix. The enriched Cr enhanced the compactness of the scales, further hindering the diffusion of ions from liquid to the surface of steel, thus reducing corrosion rate.     

8牙圆螺纹套管接头应力分析

应用弹性理论推导出了接头在不同工况条件下的应力表达式,并且在计算机上进行了模拟.计算结果与国外实验值有可比性,可用于工厂对套管进行力学性能分析.