中国石油钻井院

Assessment on Loading Capacity of Deep-water Collet Connector

中国石油集团钻井工程技术研究院（简称＂中石油钻井院＂,英文缩写DR）是中国石油天然气集团公司直属科研机构,主要从事钻井共性、特色、关键、储备技术和钻井新装备、新工具、新仪器和软件的研发,是中石油集团公司总部的钻井技术参谋部,钻井高新技术的研发中心,国内和海外钻井生产的技术支持与服务中心,钻井高新技术产业化基地。01 PCDS-Ⅰ精细控压钻井系统中国石油集团钻井工程技术研究院依托国家科技重大专项自主研制的PCDS-Ⅰ精细控压钻井系统,集恒定井底压力与微流量控制功能于一体,可进行近平衡、欠平衡精细控压钻井作业,

As a key component of underwater production system, the deep-water collet connector is subject to multiple loads over a prolonged period. For deep-water connectors with optimized design, assessments of loading ca- pacities, together with the assessment methods adopted, are very significant for safety of their installation and serv- ices. By 3D modeling, and considering mechanical properties and service environments of materials of such connec- tors, methods for assessment of loading capacities during installation and on-site services are proposed. With the deep-water collet connector deployed in a gasfield in Liwan Area of South China Sea as an example, stl~sses during installation and on-site service of the connector are calculated to determine maximum collision velocities, axial ten- sion, axial pressures and maximum bending moment of the connector. In addition, high-risk elements of the con- nector under different conditions are identified. Relevant conclusions may provide necessary guidance for underwater installation and reliability assessment of connectors.