井口装置材料抗应力腐蚀的可靠性评价  

The Evaluation on the Reliability of Wellhead Equipment Materials in Resisting Stress Corrosion

作　　者：裴峻峰[1,2] 张桂鑫[1] 殷舜时 邓学风 

机构地区：[1]江苏工业学院机械与能源工程学院,江苏常州213016 [2]江苏省油气井口装备工程技术研究中心,江苏常州213016 [3]江苏金石机械有限公司,江苏金湖211600

出　　处：《石油工业技术监督》2008年第12期27-30,68,共5页Technology Supervision in Petroleum Industry

基　　金：江苏省油气储运技术重点实验室建设项目(CY0606);江苏省科技成果转化专项资金项目"高压油气井口装备及自动安全控制系统研制及产业化"(BA2005041)资助

摘　　要：对井口装置材料抗应力腐蚀的发生条件及腐蚀机理进行了分析,并依据应力-强度干涉理论对材料的抗应力腐蚀性能进行可靠性评价。运用应力与强度呈正态分布时的可靠度计算公式,计算了不同应力状态下材料的可靠度,进而求得可靠性意义下的安全系数,从而提高井口装置材料的可靠性,可保证设备的安全运行。试验研究证明了此方法的可行性。This paper first analyzes the occurrence conditions and corrosion mechanism of stress corrosion about wellhead equipment materials. Meanwhile, the material properties for resisting stress corrosion are evaluated from the perspective of reliability according to the stress and strength interference theory. The reliability calculation formula in the normal distribution of the stress and strength has bee used to calculate the material reliability under the different stress, together with the safety factor under the reliability. Then the reliability of wellhead equipment material can be promoted so as to guarantee the safe operation of equipments. At last, experimental study has proved its flexibility.

关 键 词：井口装置 应力腐蚀 可靠性 安全系数 

分 类 号：TE980.1[石油与天然气工程—石油机械设备]