دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the column, or string, of drill pipe with attached tool joints that transmits fluid and rotational power from the kelly to the drill collars and the bit. Often, especially in the oil patch, the tenD is loosely applied to include both drill pipe and drill collars. Compare drill stem.

n: The string of drill pipe with tool joints, which transmits rotation and circulation to the drill bit. Sometimes used to include both drill collars and drill pipe.

all the equipment in a drilling BHA plus the drill pipe.