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US 8,138,124 B2Granted
Drilling fluid with circulation loss reducing additive package
AssigneeIntevep, S.A.
InventorsSarkis Kakadjian, Jacques Reinaldo Gabay, Gerardo Alonso Sanchez
Life of this patent
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Abstract
A drilling fluid includes a base fluid and a circulation loss reducing additive package having a polysaccharide, a cellulose derivative and a pH controlling component.
Claims20
A drilling fluid, comprising:
- a base fluid;
- and
- a circulation loss reducing additive package comprising a polysaccharide, a cellulose derivative and a pH controlling component, wherein said polysaccharide is scleroglucan.
A circulation loss reducing additive package, comprising a polysaccharide, a cellulose derivative and a pH controlling component, wherein said polysaccharide is scleroglucan.
A drilling fluid comprising:
- a base fluid;
- a circulation loss reducing additive package comprising scleroglucan in an amount of between 0.05 to 4.00 ppb, a cellulose derivative in an amount of between 0.05 to 5.00 ppb, a starch in an amount of between 0.05 to 5.00 ppb, a bridging agent in an amount of greater than 20 ppb, an antioxidant in an amount of between 1.00 to 2.00 ppb, a biocide in an amount of between 0.05 to 5.00 ppb, and a pH controlling component in an amount of between 1.00 to 2.00 ppb, wherein said starch component is selected from the group consisting of carboxymethyl starch, hydroxyethyl starch, hydroxypropyl starch, starches cross-linked with etherifying agents, starches cross-linked with esterifying agents and combinations thereof, wherein said bridging agent is calcium carbonate, wherein said antioxidant component is selected from the group consisting of sodium bisulfite, sodium sulfite and combinations thereof, wherein said biocide component is selected from the group consisting of isothiazolones, glutaraldehyde, quaternary amines and combinations thereof, and said pH controlling component is selected from the group consisting of monoethanolamine, ethanolamine, magnesium oxide, triethanolamine, sodium hydroxide, sodium carbonate, potassium carbonate and combinations thereof.
Dependencies are inferred from the claim text.