Patent ID: 11946327
Assignee: YANGTZE UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC E  G  Y | IPC E  G

Claim 5:
6. The automatic measuring method according to claim 2, wherein: the flow rate and the pressure dissipation in annulus pipelines are calculated with the obtained rheological parameters for different flow models; use the different calculation model for different flow models to calculate the pressure dissipation first, then for fluid flow in annulus pipeline, the flow rate is calculated by the relation between the pressure dissipation and the flow rate:

q=√{square root over (ΔpRδ/fρ)}/π(Ro2−Ri2)

where q is the flow rate, R0 is the outer diameter of the annulus, Ri is the inner diameter of the annulus, Δp is the pressure dissipation, and f is the Fanning friction factor.