Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Arvind D. Patel0
Emanuel Stamatakis0
Steven Young0
Date of Patent
April 7, 2009
Patent Application Number
10570562
Date Filed
September 1, 2004
Patent Primary Examiner
Patent abstract
A water based drilling fluid for use in drilling a subterranean well through a subterranean formation that swells in the presence of water, the drilling fluid is formulated to include: an aqueous based continuous phase; a weight material; an optional shale hydration inhibition agent and a shale encapsulator. The shale encapsulator has the formula:
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