Wells – Processes – Cementing – plugging or consolidating
Patent
1993-06-28
1994-08-16
Suchfield, George A.
Wells
Processes
Cementing, plugging or consolidating
166292, 166300, 175 65, 507136, 507139, 507140, 507145, C09K 702, E21B 2100, E21B 33138, E21B 3314
Patent
active
053378245
ABSTRACT:
A composition suitable for drilling and cementing comprising coal slag, water and drill solids, the components of the drilling fluid being chosen so as to have a dual functionality in promoting the drilling fluid and thereafter in being functional constituents of a cementitious slurry. Also, a method for drilling using a drilling fluid containing coal slag so as to lay down a filter cake which is settable and which is compatible with a subsequent coal slag cementitious slurry.
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Shell Oil Company
Suchfield George A.
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