18 July 2017
A fishing accessory run above a bit or a mill to recover small, non-drillable pieces of metal or junk in a well.
18 July 2017
A specific layer of earth or rock that presents a contrast to other layers of different material lying above, below, or adjacent to it.
18 July 2017
A short piece of pipe, expanded, or belled, at the top to guide tools into the hole. Usually has side connections for the fill-up and mud […]
18 July 2017
A flexible band or cord connecting and wrapping around each of two or more pulleys to transmit power or impart motion.