Boring or penetrating the earth – Processes – Boring with specific fluid
Patent
1983-01-24
1984-07-31
Leppink, James A.
Boring or penetrating the earth
Processes
Boring with specific fluid
175 66, 425311, 252 85LC, E21B 2100
Patent
active
044624700
ABSTRACT:
The fluid loss and viscosity loss characteristics of a water expandable bentonite clay are substantially improved by extruding the clay through die openings while, at the same time, passing a wiper or scraping blade across the entrance of the die openings. In this manner, very inexpensive and low grade clays can be substantially improved and thus modified making such clays acceptable in fluid loss and viscosity for use in a drilling fluid or mud.
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Alexander William
Odom Ira E.
American Colloid Company
Bui Thuy M.
Leppink James A.
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