Viscosifying agent
AssigneeW. R. Grace & Co.
InventorJacob Block
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Abstract
Silane modified inorganic reaction products, aqueous-based compositions containing said reaction products, a drilling fluid containing said composition and a method of drilling bore holes using said drilling fluid, wherein the silane-modified inorganic composition comprises a reaction product of magnesium hydroxide with from about 0.005 mole to about 0.3 mole per mole of hydroxide of an organo silane represented by the general formula R.sub.x SiR'.sub.4-x wherein R represents a C.sub.1 to C.sub.20 hydrocarbon radical, R' represents an alkoxy or halo radical and x is an integer of 1 to 3; the reaction product formed in an aqueous medium and under a high degree of agitation.
Claims36
A silane-modified inorganic composition consisting essentially of a reaction product of magnesium hydroxide hydrogel and a silane represented by the formula R.sub.x SiR'.sub.4-x wherein R is a C.sub.1 to C.sub.20 hydrocarbon, R' is a halo or a C.sub.1 to C.sub.20 alkoxy radical and x is an integer of from about 1 to 3;
- said reaction product formed by initiating the formation of a magnesium hydroxide hydrogel by contacting about 15 to about 30 weight percent aqueous solution of a water-soluble magnesium precursor agent capable of forming a magnesium hydroxide hydrogel with a sufficient amount of a base to cause substantially complete conversion of the magnesium precursor agent to the hydroxide;
- contacting the forming magnesium hydroxide hydrogel with from about 0.005 to 0.3 mole of said silane per mole of magnesium hydroxide;
- and causing the resultant aqueous suspension containing said reaction product to have a pH of at least about 10.
Dependencies are inferred from the claim text.