Patent ID: 7290447

Claim:
A system for verifying an oil or gas well fluid mixture, comprising: a mixing unit adapted to create the well fluid mixture from at least two components in prescribed ratio, the fluid mixture having a target density; a densimeter having a first end and a second end, the second end of the densimeter being located a selected distance downstream from the first end of the densimeter, the densimeter having a bore for the flow of the fluid mixture; a weight measuring device capable of measuring the weight of the densimeter as the fluid mixture passes there through without appreciable time delay; an inlet conduit establishing fluid communication between the mixing unit and the densimeter; a first flexible connector coupling the first end of the densimeter to a portion of the inlet conduit so that the first end of the densimeter can move relative to the inlet conduit; a second flexible connector coupling the second end of the densimeter to an outlet conduit so that the second end of the densimeter can move relative to the outlet conduit; a control unit adapted to calculate the density of the fluid mixture flowing through the densimeter based on the weight of the fluid mixture in the densimeter and adapted to compare the calculated density with the target fluid mixture density; and wherein the ratio of components in the mixing unit can be varied to make the calculated density more closely match the target density thereby verifying the fluid mixture for use in an oil or gas well.