Boring or penetrating the earth – Processes – Sampling of earth formations
Patent
1994-10-25
1996-01-09
Suchfield, George A.
Boring or penetrating the earth
Processes
Sampling of earth formations
175226, 175233, E21B 2508
Patent
active
054821231
ABSTRACT:
A pressure core barrel including an inner tube containing a non-invasive gel for encapsulating a core sample. An anti-whirl core bit is employed, and the core bit and inner tube pilot shoe are configured and arranged to prevent damage to the core from drilling fluid. A special high viscosity, low spurt loss coring fluid is employed in the coring operation. When the encapsulated, pressurized care sample is brought to the surface, pressure is bled off and the core sample's chemical and mechanical integrity are substantially preserved by the gel.
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Two-page description of the structure and operation of a prior art Eastman Christensen Pressure Core Barrel (Undated).
Baker Hughes Incorporated
Suchfield George A.
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