为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

Wellbore instability is reported frequently as one of the most significant incidents during drilling oper-ations. Analys......

An introduction of the ongoing technology of ar-gon-blowing purging plugs in China was presented in this work.Gel powder......