دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a procedure to ensure that the drilling line wears evenly throughout its life. After a specified number of ton-miles (mega joules) of use, the line is slipped-i.e., the traveling block is suspended in the derrick or propped on the rig floor so that it cannot move, the dead- line anchor bolts are loosened, and the drilling line is spooled onto the drawworks drum. Enough line is slipped to change the major points of wear on the line, such as where it passes through the sheaves. To pre- vent excess line from accumulating on the drawworks drum, the worn line is cut off and discarded.