Recent and New Information from the Slug Test Data of Ferris and Knowles (1954)

What is it about?

The slug test theories take into account or not the tested material storativity, S. Ferris and Knowles (1954) proposed a first theory with S, the FK theory. A few reasons were given to reject it in the 1970s. New and stronger reasons are given here. .The correct methods for slug tests show that the FK theory tries to fit an exponential with a hyperbola. The FK theory was the first of weird methods trying to find the S value with confusing math and physics, which have so far delayed the use of physically correct methods in ASTM standards for slug tests.

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