دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: that sheave on the crown block over which the fastline is reeved.

n: the idle wheel whose rotate speed is the fastest on the crown block,and the fast line has to pass this idle wheel to reach the barrel

n: the angle created by drilling line between the drawworks drum and die fast sheave. The line is parallel to the sheave groove at only one point on the drum. As the rope moves from this point either way. the fleet angle is created. The fleet angle should be held to a minimum-less than 1.5 degrees for grooved drums.

n: the angle between the wire ropes of the cylinder and fast sheave