深水钻井隔水管与井口技术研究进展

钻井隔水管与井口系统是深水钻井装备中重要而薄弱的环节,其正确设计与使用直接关系到钻完井作业的顺利完成。系统开展了面向南海的深水钻井隔水管与井口技术研究,建立其力学分析方法,形成一套深水钻井隔水管与井口系统钻前设计与作业技术体系;提出隔水管与井口系统的波激疲劳、涡激疲劳、磨损以及隔水管接头完整性评估方法,并进一步完善深水钻井隔水管与井口完整性管理方案;建立深水钻井隔水管关键装备与作业风险评价框架,探索台风环境下的隔水管系统安全保障的关键技术;在此基础上开发深水钻井隔水管作业管理软件,承担中国南海6口自营深水井的隔水管与井口系统钻前设计与作业技术研究工作,成功将科研成果应用到深水钻井实践中,并取得良好的应用效果。笔者对这些进展进行总结和回顾,并对今后的研究方向进行展望。

Advances in technology of deepwater drilling riser and wellhead

Drilling riser and wellhead system is an important and vulnerable component of the whole deepwater drilling system. Appropriate design and utilization of drilling riser and wellhead system are important for the success and safety of deepwater drilling and completion. Therefore, the research on deepwater drilling riser and wellhead system in the South China Sea was done early. Mechanical analysis model of deepwater drilling riser and wellhead system was built and the riser and wellhead system pre-drilling design and operation technique were developed. The analysis methods for wave induced fatigue, vortex induced fatigue, wear and riser connector integrity of riser and wellhead system were developed. Furthermore, the integrity management strategy for deepwater drilling riser and wellhead system was improved. The risk assessment frameworks for key equipments and operations of deepwater drilling riser were developed and the security measures for riser system under typhoon environment were studied. On the basis of these results, deepwater drilling riser operation management software (DDROM) was developed. The deepwater drilling riser and wellhead system pre-drilling design and operation assessment for 6wells in the South China Sea were carried out. The research results have been put into application in deepwater drilling operation in the South China Sea and good application result was achieved. The research developments of deepwater drilling riser and wellhead system are reviewed and the future research directions are also recommended.