18 July 2017

Spinning chain

A Y-shaped chain used to spin up (tighten) one joint of drill pipe into another. One end of the chain is attached to the tongs, another […]
18 July 2017

Spool, drilling

A flanged joint with side outlets, also serving as a spacer, between rams in a blowout preventer stack or between stack and casinghead.
18 July 2017

Spud

1) to move the drill stem up and down in the hole over a short distance without rotation. Careless execution of this operations creates pressure surges […]
18 July 2017

Spud in

To begin drilling; to start the hole.