远程控制水泥头的研制及性能试验

摘要

Due to high operation pressure in liner cementing in deep and ultra-deep wells,it is possible to have significant difficulties and high safety risks in the operation of the wellhead cement head.For this reason,pneumatic driving systems for mechanical structures have been designed on the basis of modifications of mechanical structures in conventional cement heads,combined with the characteristics of mechanical structures of cement head,which allows the remote control of the pneumatic driving system by the use of radio communication techniques.A remotely-controlled cement head has been developed,to complete the plug drop,ball drop and on-off the cementing manifold by remote control.Lab test results showed that the new remotely-controlled cement head could effectively meet the exigencies of field testing.The new cement head has been tested in cementation of a geothermal well through the remote operations of controlling terminals,and thus various actions were performed smoothly enough to satisfy design requirements.The successful development of the remotely-controlled cement head can provide the guarantee for well cementation operations under high wellhead pressures.%深井、超深井尾管固井作业中施工压力高,井口固井水泥头的操作难度和安全风险较大,为此,在对常规水泥头机械结构进行改进的基础上研制了远程控制水泥头,结合水泥头机械结构的特点设计了气动驱动系统,并采用无线通讯控制技术进行气动驱动系统远程操控,从而实现远程控制水泥头投塞、投球和固井管汇通断.室内测试结果表明,远程控制水泥头满足现场试验要求.远程控制水泥头在某地热井固井作业中进行了现场试验,通过远程控制水泥头控制终端,顺利完成了各项功能动作,达到了设计使用要求.远程控制水泥头的成功研制,为井口高压环境下固井作业安全提供了保障.