Non-polluting non-toxic drilling fluid compositions and method of preparation
This patent describes the process for the preparation of a non-polluting non-toxic plant or vegetable oil base drilling fluid composition comprising the steps of: (a) introducing a plant or vegetable base oil having a C-12 to C-24 carbon chain into a mixing container, (b) adding a minor amount of antioxidant to the base oil, (c) adding a minor amount of a synergist for the antioxidant, the synergist being selected from the group consisting of citric acid, ascorbic acid, phosphoric acid, monoesters of ascorbic acid and monoesters of fatty acids, to the base oil, (d) heating the base oil including the antioxidants to a temperature of about 93/sup 0/C. (200/sup 0/F.), (e) introducing a minor amount of an oleate ester emulsifier into the base oil with thorough mixing, (f) adding a minor amount of viscosifier consisting of amine-treated bentonite into the mixture with thorough mixing, (g) introducing a minor amount of an oleate ester wetting agent the mixture with thorough mixing, (h) shear mixing of the mixture for a period of not less than about 30 minutes to effect more thorough mixing to form a stable emulsion, and optionally (i) adding a finely-divided filler material into the mixture with thorough mixing to form a stable oil base drilling fluid composition having a low coefficient of friction less than about 0.15 for varied drilling purposes.
- Assignee:
- NOV; NOV-87-040714; EDB-87-029132
- Patent Number(s):
- US 4631136
- OSTI ID:
- 6986288
- Resource Relation:
- Patent File Date: Filed date 15 Feb 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
DRILLING FLUIDS
CHEMICAL COMPOSITION
ANTIOXIDANTS
ASCORBIC ACID
BENTONITE
CARBON
CARBOXYLIC ACID ESTERS
CARBOXYLIC ACIDS
CHEMICAL PREPARATION
CITRIC ACID
CONTAINERS
EMULSIFIERS
EMULSIONS
FRICTION
MEDIUM TEMPERATURE
MIXERS
MIXING
NATURAL GAS WELLS
OIL WELLS
PHOSPHORIC ACID
VEGETABLE OILS
ADDITIVES
CLAYS
COLLOIDS
DISPERSIONS
ELEMENTS
ESTERS
FLUIDS
HYDROGEN COMPOUNDS
HYDROXY ACIDS
INORGANIC ACIDS
NONMETALS
OILS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
SYNTHESIS
VITAMINS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing