Drilling fluid
First Claim
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1. A WATER-BASE DRILLING MUD WHICH COMPRISES A MAJOR AMOUNT OF AN AQUEOUS SUSPENSION OF FINELY DIVIDED SOLID INORGANIC MATERIALS AND A COPOLYMER OF ISOBUTYLENE AND MALEIC ANHYDRIDE HAVING A MOLECULAR WEIGHT IN EXCESS OF 10,000 AND CONTAINING ADMIXED THEREWITH FROM ABOUT 1% TO ABOUT 10% BY WEIGHT OF A GLYCOL HAVING THE FORMULA
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1 Claim
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1. A WATER-BASE DRILLING MUD WHICH COMPRISES A MAJOR AMOUNT OF AN AQUEOUS SUSPENSION OF FINELY DIVIDED SOLID INORGANIC MATERIALS AND A COPOLYMER OF ISOBUTYLENE AND MALEIC ANHYDRIDE HAVING A MOLECULAR WEIGHT IN EXCESS OF 10,000 AND CONTAINING ADMIXED THEREWITH FROM ABOUT 1% TO ABOUT 10% BY WEIGHT OF A GLYCOL HAVING THE FORMULA
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Current AssigneeWilliam A. Busch
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Original AssigneeWilliam A. Busch
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InventorsBusch, William A.
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Application NumberUS03/591,817Time in Patent Office631 DaysField of SearchUS Class Current507/118CPC Class CodesC09K 8/24 Polymers
