18 July 2017SubstructureThe foundation on which the derrick or mast and usually the drawworks sit. It contains space for storage and well control equipment.
18 July 2017Suction tankThe mud tank from which mud is picked up by the suction of the mud pumps. Also called a suction pit.
18 July 2017Surface casingThe first string of casing (after the conductor pipe) that is set in a well. It varies in length from a few hundred to several thousand […]
18 July 2017SwivelA rotary tool that is hung from the rotary hook and traveling block to suspend the drill stem and to permit it to rotate freely. It […]
18 July 2017SynclineA down-warped, trough-shaped configuration of folded, stratified rocks. Compare Anticline.
18 July 2017Telescopic jointA TJ is a specialized riser joint that allows for vessel heave and is comprised of an inner and outer barrel separated by a sealing mechanism. […]
18 July 2017TenderThe barge anchored alongside an offshore drilling platform. Usually contains living quarters, storage space, and the mud system.
18 July 2017Thread protectorA metal or plastic device that is screwed onto or into pipe threads to protect them from damage when the pipe is not in use.
18 July 2017ThribbleA stand of pipe made up of three joints and handled as a unit. Compare single, double, and fourble.