18 July 2017

Surge pressure

Increased hydrostatic wellbore pressure caused by downward pipe movement.
18 July 2017

Swab pressure

Lowered hydrostatic wellbore pressure caused by upward pipe movement.
18 July 2017

Swivel

A 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 2017

Syncline

A down-warped, trough-shaped configuration of folded, stratified rocks. Compare Anticline.