초록 ▼

A device for measuring flow rate of multiphase fluids such as oilwell effluents, containing liquid hydrocarbons, gas, and water includes first and second sections situated at a distance one from the other in the flow direction, each including a passage provided with structure such as venturis for in

A device for measuring flow rate of multiphase fluids such as oilwell effluents, containing liquid hydrocarbons, gas, and water includes first and second sections situated at a distance one from the other in the flow direction, each including a passage provided with structure such as venturis for inducing a change of speed therein, and respective means for measuring the resulting pressure differences, the pressure difference signals obtained in the respective sections being suitable for cross-correlation to produce a signal representative of the total volume flow rate.

대표청구항 ▼

A method of measuring flow rate for a multiphase fluid, such as the effluent of an oilwell, which may contain a mixture of liquid hydrocarbons, gas, and water, comprising the steps of: changing the flow velocity respectively in a first section and in a second section situated at a distance from each

A method of measuring flow rate for a multiphase fluid, such as the effluent of an oilwell, which may contain a mixture of liquid hydrocarbons, gas, and water, comprising the steps of: changing the flow velocity respectively in a first section and in a second section situated at a distance from each other in the flow direction to produce a first and a second pressure difference; measuring said first and second pressure differences to obtain a first and a second pressure difference signals; and determining a time lag corresponding to maximum correlation between said first and second pressure difference signals to derive a third signal indicative of the total volume flow rate q.