Patent ID: 6214773
Filing Date: 2001-04-10
Classification: C09K,Y10S

Abstract:
An improved high temperature, low residue viscous well treating fluid comprising:water;a hydrated galactomannan gelling agent present in said treating fluid in an amount in the range of from about 0.12% to about 0.48% by weight of said water in said treating fluid;a retarded cross-linking composition for buffering said treating fluid and cross-linking said hydrated galactomannan gelling agent comprised of a liquid solvent comprising a mixture of water, triethanolamine, a polyhydroxyl containing compound and isopropyl alcohol, an organotitanate chelate or an organozirconate chelate and a borate ion producing compound, said retarded cross-linking composition being present in said treating fluid in an amount in the range of from about 0.04% to about 1.0% by weight of water in said treating fluid; anda delayed gel breaker for causing said viscous treating fluid to break into a thin fluid present in said treating fluid in an amount in the range of from about 0.01% to about 2.5% by weight of water in said treating fluid.