25 July 2017

Daylight tour (pronounced “tower”)

In areas where three 8-hour tours are worked, the shift of duty on a drilling rig that starts at or about daylight. Compare evening tour and […]
18 July 2017


The basis for payment in which contractor is paid by the operator at an agreed upon daily rate. This is in lieu of a footage rate […]
18 July 2017

Dead band

Term used to describe the change in regulated pressure required before a hydraulic pressure regulator automatically adjusts to the change. Also called search band.
18 July 2017


The drilling line from the crown block sheave to the anchor, so called because it does not move. Compare fastline.