Compositions comprising an acrylamide-containing polymer and...

Details Compositions comprising an acrylamide-containing polymer and... Compositions comprising an acrylamide-containing polymer and...

C - Chemistry, Metallurgy

08

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C08L 33/26 (2006.01) C08L 71/08 (2006.01) C09K 8/12 (2006.01) C09K 8/24 (2006.01) C09K 8/60 (2006.01) C09K 7/02 (1995.01)

Patent

CA 2161916

A composition is provided which comprises an acrylamide- containing polymer comprising repeat units derived from at least two monomers, a polypropylene glycol, and optionally, a polysaccharide. Also provided is a water-based composition which can be used as drilling fluid wherein the composition comprises calcium chloride, an acrylamide-containing polymer which has repeat units derived from at least two monomers, a polypropylene glycol, and optionally, a polysaccharide. additionally, a process for using a water-based fluid which has the characteristics of an oil-based fluid as to use in drilling a gumbo shale or highly hydratable formation is provided wherein the process comprises contacting the shale or formation with a composition comprising calcium chloride, an acrylamide-containing polymer, a polypropylene glycol, and optionally, a polysaccharide wherein the acrylamide- containing polymer, polypropylene glycol, and polysaccharide are each present in a sufficient amount to effect the control of fluid loss of a water-based composition.

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