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U.S. Department of Energy
Office of Scientific and Technical Information

Method and apparatus for soil mechanics measurements of filter cakes

Patent ·
OSTI ID:6270759
An apparatus includes a main housing with a permeable cylindrical sleeve in the main housing to simulate a rock formation through which a well is drilled. A compartment is defined outside the sleeve and a solids-containing fluid is introduced into the interior of the sleeve and pressurized, so that the fluid passes through the sleeve and into the compartment, leaving a filter cake on the inside of the sleeve. A probe extends through the sleeve to simulate a drill string, and the probe can be moved toward and away from the inside surface of the sleeve. The apparatus includes a means for determining the filter cake thickness, preferably ultrasonically.
Assignee:
Ontario Research Foundation (Canada)
Patent Number(s):
US 4548080
OSTI ID:
6270759
Country of Publication:
United States
Language:
English