دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n : a fishing tool used to retrieve pipe lost in a well. The spear is lowered down the hole and into the lost pipe. When weight, torque, or both are applied to the string to which the spear is attached, the slips in the spear expand and tighdy grip the inside of the wall of the lost pipe. Then the string,spear, and lost pipe are pulled to the SPEARS surface.

n: An inside catch tool which goes inside a tubular fish and catches it with a slip.

a fishing tool that is designed to enter an opening of a fish and grip the ID.