Well velocity logging

Details Well velocity logging Well velocity logging

1991-12-16

1993-01-12

Williams, Hezron E.

Measuring and testing

Borehole or drilling

Downhole test

73861, E21B 4700

Patent

active

051780062

ABSTRACT:
A device having a large fluid drag tendency is lowered into a well at a rate which gives no net drag against the fluid. The condition of no net drag is indicated by the tension in a line used to lower the tool into the well. When the spool-off rate is such that this tension force is equal to or slightly exceeds the weight of the tool plus the weight of the line in the borehole the tool is moving at a speed equal to the average flow velocity in the well. This velocity may be determined by measurement of the spool-off rate.

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patent: 4007366 (1977-02-01), Wiley et al.
patent: 4326411 (1982-04-01), Gant et al.
patent: 4581926 (1986-04-01), Moore et al.
patent: 4662218 (1987-05-01), Hawthorne
patent: 4736627 (1988-04-01), Wicks, III et al.
patent: 4817713 (1989-04-01), Nguyen et al.

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