دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a wire rope, one end of which is connected to the end of the breakout tongs and the other end of which is attached to the breakout cathead. When the driller activates the cathead, the cathead pulls on the jerk line with great force to apply torque to break out a tool joint (or to tighten a drill collar connection).

n: a passage of steel wire that connected with automatic cathead.

a cable from the tongs through a pulley in the mast and to the cat head.

n: a wrench that is used to make up or break out drill pipe, tubing, or casing on which the torque is provided by air or fluid pressure. Conventional tongs are operated by mechanical pull provided by a jerk line connected to a cathead.