This kind of new technology can give distensible well look in superstratum bushing run the drilling tool into the well, be such more in directional well and horizontal well especially.

• 用减小套管柱间隙 [(小间隙井身结构(RCCP) ]的方法钻井是很有价值的。这种新技术可以在上层套管下钻出扩大的井眼 ,尤其是在定向井和水平井中更是如此。