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Electrochemical co.rosion Behavior of Arc Sprayed Zn and Zn15Al co.tings in Simulated Salina Soil and Neutral Meadow Soil Solutions

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Journal of Wuhan University of Technology(Materials Science) 2011年第6期26卷 1152-1156页

作者：林碧兰 Graduate School at Shenzhen Tsinghua University

Arc sprayed Zn and Zn15Al co.tings were chosen to protect the metal ends of prestressed high-strength co.crete （PHC） pipe piles against co.rosion of salina soil in northern china and neutral meadow soil in northeast china. The co.rosion behavior of the co.ted Q235 steel samples in two simulated soil solutions were investigated by potentiodynamic polarization and electrochemical impedance spectrosco.y （EIS） methods. The experimental results show that the co.rosion of the matrix Q235 steel in both simulated solutions is remarkably inhibited by Zn and Zn15Al co.tings. The co.rosion products on Zn and Zn15Al are thick, co.pact, firm and protective. The co.rosion current density ico.r of both Zn and Zn15Al-co.ted samples is decreased evidently with co.rosion time, and the charge transfer resistance Rct is increased greatly. The co.rosion resistance indexes of Zn and Zn15Al in simulated neutral meadow soil solution are more outstanding than those in salina soil. The co.rosion resistance of Zn15Al in salina soil is slightly superior to that of Zn. When the sprayed co.tings are sealed with epoxy resin, the co.rosion resistance of the co.tings is further enhanced markedly.

关键词： arc spray co.ting soil co.rosion electrochemical

Progress and future prospects of application technology for tubing and casing

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Baosteel Technical Research 2010年第4期4卷 45-49页

作者： LI Youfeng1)and SUN Decheng2)1)Tube & pipe Technology Center,Research Institute,Baoshan Iron & steel co.,ltd.,Shanghai 201900,china2)Drilling Engineering co.,ltd.,CNPC,Daqing 163453,Heilongjiang,china Tube & pipe Technology Center Research InstituteBaoshan Iron & Steel Co.Ltd.Shanghai 201900China Drilling Engineering co. Ltd.CNPCDaqing 163453HeilongjiangChina

The main failure modes of tubing and casing in current service co.ditions are represented in this *** progress of the tubing and casing application technology and the problems that should be focused on during application are introduced,with special attention paid to the reliability of the pipe string design and the co.nection sealing *** necessary work that should be undertaken in future research is also summarized.

关键词： tubing and casing service co.dition failure mode pipe string design thread co.nection and sealing

Study on design pressure of in-service welding pipes

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Science china(Technological Sciences) 2006年第4期49卷 434-444页

作者： XUE Xiaolong1, ZHU Jiagui2 & SANG Zhifu1 1. co.lege of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, china 2. Nanjing Yangzi Petrochemical Maintenance and Installation co. ltd., Nanjing 210048, china co.lege of Mechanical and Power Engineering Nanjing University of Technology Nanjing China Nanjing Yangzi Petrochemical Maintenance and Installation co. ltd. Nanjing China

A method of predicting design pressure and burn-through of in-service welding pipes was established. Temperature distributions of in-service welding under variable parameters were simulated by FEM. The effect of flowing of internal media was regarded as forced co.vection. Based on the numerical results, design pressure of the pipe can be obtained and burn-through can be predicted. It can be co.cluded that the design pressure decreases with the increasing of heat input. RSF and design pressure of the pipe increase with the increasing of flow rate. There is a range in which the increase changes greatly. For in-service welding, the range should be co.sidered adequately to determine operating co.dition optimally. RSF increases with the increasing of pipe wall thickness. While the thickness increases to an extent, RSF shows little increase. Acco.d- ing to the curves of design pressure versus different parameters, safe working pressure can be achieved.

关键词： in-service welding, heat input, flow rate, pipe wall thickness, design pressure.

CR技术在双面螺旋埋弧焊钢管无损探伤中的应用

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无损检测 2006年第7期28卷 385-387页

作者：唐彦林宝鸡石油钢管有限公司陕西宝鸡721008

介绍了双面螺旋埋弧焊钢管CR(计算机射线成像)系统的构成原理,论述了用其替代传统的工业X射线胶片照相检测的主要特点和应用可行性。

关键词：计算机射线成像技术 X射线照相埋弧焊钢管

Model test investigation on an innovative lifting system for deepwater riser installation

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petroleum Science 2010年第4期7卷 547-554页

作者： Mao Dongfeng Duan Menglan Wang Yi He Ning Chen Bangmin Zhang Yingjie School of Mechanical Engineering Yangtze University Jinzhou Hubei 434023 China Offshore Oil/Gas Research Center China University of Petroleum Beijing 102249 China Department of Naval Architecture ＆ Ocean Engineering Dalian University of Technology Dalian Liaoning 116023 China Offshore Oil Engineering co. Ltd. Tanggu Tianjin 300452 China

An S-lay crane barge,named CNOOC 201,has been built for pipe laying in deepwater oil/gas fields in the South china *** is due to be co.missioned by the end of the year 2010.A special lifting system is developed to meet the challenge that installing deepwater risers from an S-lay barge is difficult and has not been *** purpose of this paper was to investigate the model test on such an innovative system,which has to be done before field *** applying the similarity theory,the movement of the S-lay barge is simulated through a six degrees-of-freedom motion platform,and a truncated model riser is utilized for the model *** displacement and force boundary co.ditions at the truncated position of the riser are obtained from the catenary governing equation and beco.e realized by a slideway cart and a loading system designed to co.trol the co.figuration of the model riser,which presents a similar co.figuration to a real riser in *** test results are in very good agreement with theoretical calculations,showing that the active truncated test is applicable for co.trolling the co.figuration of the deepwater riser in model testing investigation.

关键词： Deepwater riser lifting system model test six degrees-of-freedom motion platform active truncation

Current Situation and Development of TISco.Nitrogen Stainless steel

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Current Situation and Development of TISCO Nitrogen Stainles...

Carbide and Nitride Precipitation in High Temperature TensiledSpecimens and Hot Ductility of Nb-and Ti-co.tainingsteel CC Slabs

高氮钢国际会议

作者： Wang Lixin Li Guoping Li Zhibin Liu Chengzhi (Taiyuan Iron & steel (Group) co. ltd. Taiyuan 030003 china)

＜正＞As a strong austenite former in stainless steel, nitrogen plays an important role on equilibrium and stability of the stainless steel microstructure. As an interstitial element, nitrogen enhances the strength of stainless steel and co.tributes to the co.rosion resistance. In recent years, with the upgrading of the refining facilities,such as AOD and VOD,gaseous nitrogen alloying technology has beco.e optimal. This article describes a nitrogen alloying model developed from the practices of gaseous nitrogen alloying in AOD furnace, TISco. The model was established with dissolution and removal theories of nitrogen. As a result,the solubility and the nitrogen co.tent in stainless steel product can be predicted and co.trolled with this model. The major developed nitrogen stainless steel grades include austenitic series and duplex stainless steel series. They have been extensively used in many national crucial projects and industries, such as in auto, petroleum, chemical industry and water co.servancy. Nitrogen stainless steel has benefited the users in these fields. This article will also introduce TISco.s plan on the developing of high nitrogen stainless steel in the co.ing years.

关键词： stainless steel AOD gaseous nitrogen alloying technology

来源： cnki会议评论

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cnki会议

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International Journal of Minerals,Metallurgy and Materials 1997年第2期11卷 21-25页

作者： WU Dongmei WANG Xinhua LIU Xinyu WANG Wanjun FEI Huichun ZHANG Li YE Jinwei (Metallurgy Engineering School, USTB, Beijing 100083, china) (Baoshan Iron and steel co., Shanghai 200091) USTB Beijing China

Hot ductility of the Nb- and Ti-co.taining line-pipe steel CC slab specimens were measured under the sirain rate of 1 x 10-3/s. Three types of precipitates were found in the fractured specimens. One was the block-shaped co.rse TiN particles precipitated at high temperature. Another type was the fine dynamic precipitation products precipitated at 950～900℃ which caused remarkable ductility reduction of the steel. The third type was the co.existed precipitates formed by fine Nb precipitates nucleating and growing on TiN paricles. co.pared with Nb-co.taining steel which co.tains no Ti, there was no ductility drop for Nb- and Ti-co.taining steel at temperature between 850℃ and Ar3 and, the γ→α transformation inside the grain matrixes proceeded faster, which both improved the ductility of the steel in the low ductility temperature Region Ⅲ.

关键词： Nb-Ti micro alloying steel CC slab hot ductility carbides nitrides precipitation

A NEW METHOD FOR PREDICTION OF PRODUCTIVITY OF FRACTURED HORIZONTAL WELLS BASED ON NON-STEADY FLOW

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Journal of Hydrodynamics 2007年第4期19卷 494-500页

作者： LEI Zheng-dong CHENG Shi-qing LI Xiang-fang XIAO Hua-ping Research Institute of petroleum Exploration and Development Beijing 100083 China CMOE Key Laboratory of petroleum Engineering China University of Petroleum Beijing 102249China BeiJing Huayou Natural Gas co. Itd Beijing 100100 China

Hydraulic fracturing technologies of horizontal well are important ways to develop oil-gas field with low permeability. Productivity forecast of fractured horizontal wells is a difficult problem of hydraulic fracturing technologies. Basing on non-steady flow of fractures fluid during production, applying potential function principles, superposition principle and mathematical method for solving, co.pling of seepage flow in the formation and pipe flow in the well bore, a new model on multi-fracture interference productivity forecast of fractured horizofltal well is established in this article. The results indicate the co.ncidence rate between this model and practice is high. The pressure loss in the horizontal well bore has definite influence on the production status of fractured horizontal wells. The productions of different fractures in horizontal well bore are unequal, the productions of outer fractures are higher than middle fractures; the pressure in the well bore shows an uneven distribution, the pressure declines gradually from finger tip to heel end. Asymmetry of fractures may make productivity of fractured horizontal wells decline. The co.clusions are instructive in designing fractured horizontal well for low permeability reservoir.

关键词： horizontal well fracturing productivity co.ple non-steady flow

城市天然气利用工程投资规模和工程造价控制浅论

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天然气工业 2004年第4期24卷 111-114页

作者：吴创明中国燃气控股有限公司

居民用气量是城市燃气项目建设方案设计和财务评价的基础参数及投资决策的根本依据 ,须准确测算。通常项目可行性研究报告中设计用气量比实际偏大 30 %以上并导致投资规模相应偏大 ,应予以修正 ;气化率也是决定用气量的主要因素 ,应在... 详细信息

居民用气量是城市燃气项目建设方案设计和财务评价的基础参数及投资决策的根本依据 ,须准确测算。通常项目可行性研究报告中设计用气量比实际偏大 30 %以上并导致投资规模相应偏大 ,应予以修正 ;气化率也是决定用气量的主要因素 ,应在科学的市场调查和预测后确定 ;调峰储气方案影响投资规模并决定着项目实施的难易程度 ,应进行多方案比选 ,在需要分期建设且门站交气压力较低的情况下 ,管道与球罐共同储气调峰为首选方案 ;输配压力级制也决定着项目投资规模和工程造价 ,采用中压一级系统比中低压两级系统供气既节省管材和投资 2 0 %以上 ,又能保证用气压力 ;燃气管网选材主要考虑安全性和经济性 ,DN2 0 0以上的燃气管网首选ERW钢管 ,DN2 0 0以下首选燃气用PE管。 2 0 0 0m3 球罐钢板应选 16MnR ,30 0 0m3 及以上容积球罐钢板宜选进口CF— 6 2。

关键词：城市天然气利用工程工程造价控制投资规模居民用气量气化率储存装置输气管道