Oil and Gas Terms Beginning with “D” — Page 10

Dynamic fluid level is the depth, measured from surface down the annulus, to which the fluid column falls in a well while it is actively producing under artificial lift, and it is also called the pumping fluid level. It… Read more →

What Is Dynamic Positioning? Dynamic positioning (also called DP or dynamic station-keeping ) is an active, computer-controlled system that uses thrusters distributed around the hull of a drillship, semi-submersible, or… Read more →

Dynamic range is the ratio between the largest and the smallest signal that an instrument can record or reproduce without distortion at the top end or being lost in noise at the bottom end. In oilfield measurement it… Read more →

Dynamite, in the petroleum geophysics context, is a nitroglycerin-based or ammonium nitrate-fuel oil (ANFO) blasting explosive used as a seismic energy source for land seismic surveys, detonated in shallow boreholes… Read more →

An instrument used in sucker-rod pumping to record the variation between the polished rod load and the polished rod displacement. Read more →

What Is a Dynamometer Card? Dynamometer card (also called a pump card or rod pump diagnostic card) is a plot of the polished rod load versus rod displacement over one complete pump stroke cycle. Surface dynamometers… Read more →