Patent ID: 8943900
Filing Date: 2015-02-03
Classification: E21B,G01F,G01L

Abstract:
1. A flow rate device for measuring the flow rate of a fluid flowing through a wellbore, the flow rate device comprising: a differential pressure conduit locatable in the wellbore, the differential pressure conduit defining an internal bore and adapted to create a differential pressure, the differential pressure conduit defining first and second pressure measuring stations axially spaced along the differential pressure conduit; a first pressure sensor positioned at the first pressure measuring station, the first pressure sensor having a first Wheatstone bridge adapted to generate a first pressure measurement signal indicative of a first pressure at the first pressure measuring station; and a second pressure sensor positioned at the second pressure measuring station, the second pressure sensor having a second Wheatstone bridge adapted to generate a second pressure measurement signal indicative of a second pressure at the second pressure measuring station; wherein the first Wheatstone bridge and the second Wheatstone bridge are homogeneous and have similar characteristics with respect to at least one of a temperature sensitivity, a pressure sensitivity, and a non-linearity, the similar characteristics are within a range of 0.01 percent to 10.0 percent.