The invention relates to a multifunctional water pump deepwater drilling system and its installation method, which is characterized in that it is set up on the drilling platform lifting mechanism and control center; the lifting mechanism is connected with a water pump through cable, water pump connected control pipeline, injection / return line and a plurality of flexible pipe, the other end is connected the control center control line, injection / return line is connected with the other end arranged on the drilling platform of the mud pool, the flexible pipeline is connected with the other end of a rotary shunt injection device, rotary shunt injection device is connected and arranged on the top of the drilling platform on the riser, connected at the bottom end of riser or subsea BOP, subsea BOP on the sea floor at the wellhead. The underwater pump set of the invention can be submerged in sea water or can be arranged at the bottom of the sea, and can realize the functions of double gradient drilling, controllable mud cap drilling, dilution of a water tight pipe, double density drilling, etc..
【技术实现步骤摘要】
【技术保护点】
１．一种深水多功能水中泵钻井系统，其特征在于：它包括设置在钻井平台上的提升机构和控制中心；所述提升机构通过缆绳连接一浮筒，所述浮筒内设置有由海底泥浆泵组成的水中泵组，所述水中泵组分别连接控制管线、注入／回流管线和若干挠性管线，所述控制管线的另一端连接所述控制中心，所述注入／回流管线的另一端连接设置在所述钻井平台上的泥浆池，各所述挠性管线的另一端连接一旋转分流注入装置，所述旋转分流注入装置的顶部连接上隔水管，所述上隔水管的另一端设置在钻井平台上，所述旋转分流注入装置的底端连接海底防喷器，所述海底防喷器设置在海底井口处；所述钻井平台上设置的钻杆依次穿过所述上隔水管、旋转分流注入装置和海底防喷器下入井底，位于井底的所述钻杆外设置有套管，所述套管外设置有导管。
【技术特征摘要】
【专利技术属性】
技术研发人员：殷志明，陈国明，徐群，周建良，蒋世全，许亮斌，
申请(专利权)人：中国海洋石油总公司，中海石油研究中心，中国石油大学华东，
类型：发明
国别省市：11
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