| 摘要 |
PCT No. PCT/NO95/00211 Sec. 371 Date Jul. 8, 1997 Sec. 102(e) Date Jul. 8, 1997 PCT Filed Nov. 9, 1995 PCT Pub. No. WO96/15427 PCT Pub. Date May 23, 1996A method for measuring the flow rate in a fluid flow, particularly a two-phase flow comprising oil, water and gas from an offshore well, in which a temporary transitory shut-off of the fluid flow by means of a valve is performed, and the fluid pressure at a location immediately upstream of the valve is recorded from a moment of time when the valve starts closing to a selected moment of time after the valve is fully closed. Subsequently, the valve is opened to reestablish the fluid flow, and the fluid mass flux G is determined as a function of fluid density, friction factor, pipe diameter, selected moment of time after closure of the valve, friction loss recorded at the selected moment after closure and a pressure surge pressure.
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