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套管钻井就是用套管代替钻杆对钻头施加扭矩和钻压,实现钻头旋转与钻进。整个钻井过程不再使用钻杆、钴铤等。钻头是利用钢丝绳投捞,在套管内实现钻头升降,即实现不提钻更换钻头、钻具,减少了起下钻和井喷、卡钻等意外事故,提高了钻井安全性,降低了成本。20世纪50年代就有人设想用套管代替钻杆来完成钻井作业,但受当时的技术和装备条件的限制,很难实现。20世纪90年代,由于新技术、新材料以及电子技术的大
Casing drilling is the use of casing instead of drill pipe to the bit torque and weight-bit, bit rotation and drilling. The entire drilling process no longer use drill pipe, cobalt collar and so on. Drill bit is the use of steel wire rope fishing, drilling in the casing to achieve lifting, that is, do not mention drilling to replace the drill bit, drill, reducing the drilling and blowout, stuck and other accidents, increased drilling safety and reduce costs. It was envisioned in the 1950s to use casing instead of drill pipe to complete drilling operations, but was limited by the technical and equipment constraints of the time and was difficult to achieve. The 1990s, due to the new technology, new materials and electronic technology