the fraction of the total volume of the borehole sampled by the measurement device that contains a particular phase; more specifically, oil holdup, water holdup, and gas holdup. Horizontal Direction Drilling - a trenchless construction technique, which uses guided drilling for creating an arc profile. See HDD Services
Refers to the volume fraction of a specific fluid phase in the upward moving flow stream; e.g., water holdup; oil holdup.
In a producing well, the volume fraction of a specific fluid phase (e.g., water holdup, oil holdup) in the upward moving flow stream. The relative quantities of the fluids produced at the surface are related to the holdup and upward velocity of each phase.