Patent ID: 6180572
Filing Date: 2001-01-30
Classification: C08L,C09K

Abstract:
A method of controlling the viscosity of a water-based based borehole servicing fluid comprising adding to said fluid a storage-stable homogenous mixture of a liquid phase and a solid phase, said liquid phase comprising an oleophilic organic oil selected from the group consisting of monocarboxylic acid esters, polycarboxylic acid esters, carbonic acid esters, ethers, fatty alcohols, oligoalkoxides of fatty alcohols, and mixtures thereof, wherein said liquid phase is flowable at temperatures of 0 to 10.degree. C., has a flashpoint of at least 80.degree. C., and has a viscosity of not more than 150 mPas at 10.degree. C., and said solid phase comprising guar, a water-soluble guar derivative, or a mixture thereof wherein the weight ratio of the liquid phase to the solid phase is 65:35 to 40:60.