石油钻采工艺Issue(1)：132-134,3.DOI:10.13639/j.odpt.2015.01.034
深水弃井套管切割技术
Casing cutting technology for abandoned deepwater wells
摘要
Abstract
The deepwater subsea wellhead is of large size and high strength. The increasing water depth results in complexity of string stress during the cutting process. Plus immaturity of cutting tools and lack of experience, there is a great technical challenge to earlier self-support deepwater wells in China, when the abandoned wells’ of casing and subsea wellhead is cutting, which may result in complex conditions of varying degrees in the operation. Considering the construction cases of self-support deepwater wells and foreign deepwater abandoned wells, the risks and technical dififculties in casing cutting of deepwater abandoned wells are deeply analyzed, and the causes for failed operations are summarized. Methods to improve the technical solutions, abandoned well tools, and construction parameters are proposed. The risks in the operations of deepwater abandoned wells are fully analyzed and appropriate preventive and control measures are provided, which successfully applied in the second batch of deepwater wells to improve the safety and timeliness of deepwater operations. That conifrms the correctness of the previous improvement ideas and solves the technical problems about deepwater abandoned wells.关键词
深水/弃井/套管切割/水下井口/技术对策Key words
deepwater/abandoned well/casing cutting/subsea wellhead/technical countermeasures分类
信息技术与安全科学引用本文复制引用
阳文学,姜清兆,汪顺文,张春杰..深水弃井套管切割技术[J].石油钻采工艺,2015,(1):132-134,3.基金项目
“十二五”国家科技重大专项“深水钻完井及其救援井应用技术研究”（编号2011ZX05026-001）。 （）
