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Foam drilling and workover in high temperature wells

Patent ·
OSTI ID:6452720
;
A method is described for conducting foam drilling and workover operations in a borehole penetrating a subterranean reservoir, particularly a high-temperature reservoir such as a geothermal reservoir. The method employs an aqueous foaming solution of 0.08 to 1.0% by weight of an amphoteric betaine, 0.02 to 0.4% by weight of a salt of a linear aliphatic or alkyl aryl hydrocarbon sulfonate and, optionally, from 0.03 to 3.5% by weight unneutralized ammonia. 19 claims.
Assignee:
Union Oil Co., CA
Patent Number(s):
US 4201678
OSTI ID:
6452720
Country of Publication:
United States
Language:
English

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Related Subjects

15 GEOTHERMAL ENERGY
150901* -- Geothermal Engineering-- Drilling Technology & Well Hardware
AMINES
AMINO ACIDS
AMMONIA
AMMONIUM COMPOUNDS
BETAINE
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
COLLOIDS
DISPERSIONS
DRILLING
DRUGS
FOAMS
GEOTHERMAL WELLS
HYDRIDES
HYDROGEN COMPOUNDS
LIPOTROPIC FACTORS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
QUANTITY RATIO
QUATERNARY COMPOUNDS
SULFONATES
WELL DRILLING
WELL SERVICING
WELLS