25 July 2017


Said of equipment or a system so constructed that, in the event of failure or malfunction of any part of the system, devices are automatically activated […]
18 July 2017


The end of the drilling line that is affixed to the drum or reel of the drawworks, so called because it travels with greater velocity than […]
25 July 2017


A break in the earth’s crust along which rocks on one side have been displaced (upward, downward, or laterally), relative to those on the other side.
25 July 2017


The act of unwinding a cable from a drum. Also a device on a drilling rig that keeps the weight on the bit constant, and lowers […]