Well fluid velocity measurement method and system

Details Well fluid velocity measurement method and system Well fluid velocity measurement method and system

1980-05-27

1982-02-09

Goldstein, Herbert

Measuring and testing

Borehole or drilling

Downhole test

E21B 4700

Patent

active

043144764

ABSTRACT:
The invention provides a system and method measuring high and low fluid velocity in well bores and particularly for fluids exhibiting stirring action. The system and method (300) includes a restrictor (310) inserted into the bore hole (10) at a desired depth which minimizes stirring action (40) and impedes the upward flow of the fluids and a sensor (320) measuring any difference in fluid pressure above and below the restrictor. The restrictor (310) is pulled upwardly by cable (340) connected to powered reel (430 and 440) at a velocity sufficient to maintain the differential pressure (.DELTA.P) across the restrictor (310) at zero. When the differential pressure (.DELTA.P) is zero, the velocity at which the restrictor (310) moves upwardly in the bore hole (10) is equal to the velocity of the fluids in the vicinity of the restrictor (310). The velocity of the pulled cable (340) can be sensed and recorded as the velocity of the multi-phase fluids.

REFERENCES:
patent: 2277898 (1942-03-01), Andrew
patent: 2674877 (1954-04-01), Silverman et al.

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