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

Swabbing

1) operation of a lifting device on a wireline to bring well fluids to the surface when the well does not flow naturally. This is a […]
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 […]