دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. cable-tool drilling. 2. rotary drilling in which a special tool called a hammer drill is used in combination with a roller cone bit.

n: 1 see cable tool drilling. 2. during the rotating drilling, connected special high frequent hammer assembly with the cone bit, the breaking rock caused by rotated and shocked jointly.