Key Technologies of the Subsea Release Cementing Process
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摘要: 浮式钻井装置水下井口系统注水泥工艺存在套管胶塞如何安放、安放位置如何选择、套管胶塞如何释放及如何适应水下井口系统等技术难点。针对该技术难点,通过分析水下井口系统的结构和工作原理,并对浮式钻井装置研究和实践,形成了浮式钻井装置技术套管和生产套管配套注水泥工艺,即水下释放塞注水泥工艺。分析了该工艺的原理、工具组成、施工中可能的风险点、工艺优化及发展趋势,介绍了现场应用中的技术准备、施工步骤及应用效果。研究表明,水下释放塞注水泥工艺可操作性强、连贯性好、稳定性高,满足浮式钻井装置钻井工艺需要,可解决水下井口系统注水泥工艺遇到的难题。Abstract: The cement technology of the underwater wellhead system of the floating drilling rig is faced with the following technical problems: how to set the casing plugs, how to choose the setting locations, how to release the rubber plugs and how to adapt to underwater wellhead systems. In order to solve these problems, subsea release cementing technology was developed after underwater wellhead systems were analyzed in terms of structures and operational principles and floating drilling rigs were investigated and applied in field. They carried out cementing by using intermediate casing and the production casing of the floating drilling rig. In this paper, the principle of the process, the components of the tools, the possible risk points, the process optimization and the development trend are analyzed, and the technical preparation, operation steps and application effects of the field application were illustrated. It was demonstrated that the subsea release cementing technology was characterized by strong operability, good continuity and high stability, and it could meet the drilling requirements of floating drilling rigs and solve the problems encountered in the process of underwater wellhead cementing.
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Keywords:
- deep water well /
- cementing /
- casing /
- rubber plug /
- cement head
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