دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: See roller cone bit.

n: The cone bit using drilling fluid as cooling medium of bearing. No joint ring in the cavity of bearing.

n: See four-conebit.

n: refer to double-cone bit

n: a classified regulation for the abrasion of the tooth and bearing on the cone bit

n: a kind of bit used to drill big hole ,the cone set on the eccentric pipe which is connected with the pipe by flange

n: a type of roller cone bit in which the cutting structure consists of the specially designed tungsten carbide cutter set into the cones.

n: see roller cone bit.

n: a drilling bit with two or morecones mounted on bearings. The cutters consist of steel teeth or tungsten carbide inserts.

n: see roller cone bit.

n: a drilling bit with two or morecones mounted on bearings. The cutters consist of steel teeth or tungsten carbide inserts. Also called a rock bit.

n: a drilling bit with two or morecones mounted on bearings. The cutters consist of steel teeth or tungsten carbide inserts. Also called a rock bit.

a bit with multiple rotating cones that bring cutters into contact with the formation as the string is rotated.