Patent ID: 11898094
Assignee: CHEVRON U.S.A. INC.
Field: Measurement (Instruments)
Classification: CPC C  E  G | IPC C  E  G

Claim 12:
13. A process to determine drag reduction for a fluid mixture for an oil field operation or a pipeline operation comprising:
measuring one or more fluid properties of a fluid mixture comprising a concentration of a drag reducing agent in a laboratory, flow loop, or with a portable apparatus, or any combination thereof;
determining a small-scale drag reduction parameter ΔB for the fluid mixture based on the one or more fluid properties; and
upscaling the small-scale drag reduction parameter ΔB to determine a target fluid mixture for use in the oil field operation or the pipeline operation;
wherein the drag reduction parameter ΔB is defined by an equation:

ΔB=ΔBmaxBN 

wherein

BN=0 for Wi<1 and

BN=CDF for 0<BN<1

wherein ΔBmax is maximum drag reduction at Wi>>1, BN is normalized drag reduction as a function of shear, Wi={dot over (γ)}wλ is Weissenberg number, {dot over (γ)}w is the wall shear rate, λ is the longest relaxation time, and CDF is a cumulative distribution function.