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.
18 July 2017

Squeeze cementing

The forcing of cement slurry by pressure to specified points in a well to cause seals at the points of squeeze. It is a secondary cementing […]
18 July 2017

Stab

To guide the end of a pipe into a coupling or tool joint when making up a connection.
18 July 2017

Stabbing board

A temporary platform erected in the derrick or mast some 20 to 40 ft (6-12 m) above the derrick floor. The derrickman or another crew member […]
25 July 2017

Stabilizer

A centralizer attached to the Drill Collar to center the bit in the hole. Stabilizers may be spaced out over the drill collar string to prevent […]
18 July 2017

Stacking a rig

Storing a drilling rig upon completion of a job when the rig is to be withdrawn from operation for a period of time.
18 July 2017

Stake a well

To locate precisely on the surface of the ground the point at which a well is to be drilled. After exploration techniques have revealed the possibility […]
18 July 2017

Stand

The connected joints of pipe racked in the derrick or mast during a trip. The usual stand is about 90 ft long (about 27 m), which […]