18 July 2017
In drilling, a single length (from 16 ft to 45 ft, or 5 m to 14.5 m, depending on its range length) of drill pipe, drill […]
18 July 2017
Metal debris lost in a hole. Junk may be a lost bit, pieces of a bit, milled pieces of pipe, wrenches, or any relatively small object […]
18 July 2017
The heavy steel member, three-, four-, six-, or eight- sided, suspended from the swivel through the rotary table and connected to the topmost joint of drill […]
18 July 2017
Special device that, when fitted into the master bushing, transmits torque to the kelly and simultaneously permits vertical movement of the kelly to make hole. It […]