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US 5,627,076 AGranted
Method for determination of glycols and polyglycols in drilling fluid filtrates
AssigneeBaker Hughes Incorporated
InventorsNyal S. Walker, Patrick L. Henderson
Life of this patent
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Abstract
An apparatus and method is presented for the determination of water soluble glycols and polyglycols (polyalkoxylates). The apparatus and method are particularly suited for the on-site quantitation of glycols and polyglycols in aqueous drilling fluids.
Claims6
A method for determining concentrations of glycols and/or polyglycols in fluids, comprising the steps of:
- filtering particulates from the fluid to obtain a filtrate;
- mixing an aliquot of the filtrate with a cobaltothiocyanate indicator solution to form a test solution, wherein said cobaltothiocyanate solution comprises cobalt nitrate hexahydrate, ammonium chloride, potassium thiocyanate, water and an immiscible organic solvent;
- comparing the resulting color of the test solution with at least one standard cobaltothiocyanate solution to determine the concentration of glycols and/or polyglycols.
Dependencies are inferred from the claim text.