Other

Monsanto Company

C Bryan Skaggs

John M Swazey

Thomas R Sifferman

Daniel B Solarek

Nina Nguyen

Walter Gregory Rakitsky

Harold Dean Dial

Selectively cross-linked starches are disclosed that are useful as fluid loss control additives in subterranean treatment fluids comprising starches that cross-linked to a Brabender peak viscosity of about 800 to about 1250 Brabender units after about 40 to about 70 minutes at about 92&deg; C. and provide good fluid loss control over a temperature range of from about 20&deg; C. to about 160&deg; C. (68&deg; F. to 320&deg; F.).

Method of controlling loss of a subterranean treatment fluid

Selectively cross-linked starches are disclosed that are useful as fluid loss control additives in subterranean treatment fluids comprising starches that are cross-linked to a Brabender peak viscosity of about 800 to about 1250 Brabender units after about 40 to about 70 minutes at about 92&deg; C. and provide good fluid loss control over a temperature range of from about 20&deg; C. to about 160&deg; C. (68&deg; F. to 320&deg; F.).

Fluid loss control additives and subterranean treatment fluids containing the same

Rheologically modified compositions, and rheologically modified fluid compositions prepared therefrom, containing reticulated bacterial cellulose in a polyol base fluid, are disclosed. The amount of reticulated bacterial cellulose present in the composition is an amount effective to viscosify the polyol base fluid.

Reticulated bacterial cellulose as a rheological modifier for polyol

This invention is directed to a rheologically modified composition containing scleroglucan in an polyol base fluid. The amount of scleroglucan present in the composition is an effective amount to viscosity an polyol base fluid to the point of substantially reducing convection flow in the composition. The composition may be used as an effective thermal insulation material. Applications for this type of insulating material include, among others, use as a de-icing fluid and use as a pipeline insulator. The rheologically modified insulation composition of this invention may be particularly suitable for maintaining high oil temperature during conveyance within a pipe located in a relatively low temperature environment such as sea water.

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San Diego, CA, United States of America

C Bryan Skaggs