Zone isolator module for use on a penetrometer

Details Zone isolator module for use on a penetrometer Zone isolator module for use on a penetrometer

1996-06-07

1997-12-16

Noland, Thomas P.

Measuring and testing

Probe or probe mounting

7386474, 175 21, 175 59, 175230, E21B 4910

Patent

active

056987994

ABSTRACT:
A zone isolator module for use on a penetrometer comprises a tubular body having an annular recess in an exterior wall thereof, an elastomer membrane fixed in the annular recess and adapted to lie against an inner surface of the recess, a sleeve slidably disposed on the tubular body and slidably movable between a first position in which the sleeve completely covers the recess, and a second position in which the sleeve is substantially removed from the recess, and the body having an opening extending outwardly from an axial central bore therethrough to the inner surface of the recess, whereby fluid flowed through the bore and the opening operates to expand the elastomer membrane against the sleeve when the sleeve covers the recess and to expand the elastomer membrane beyond the exterior wall of the body when the sleeve is substantially removed from the recess.

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patent: 4928758 (1990-05-01), Siegfried, II
patent: 5563512 (1996-10-01), Mumby

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