Non-polluting non-toxic drilling fluid compositions and method of preparation

Patent · Tue Dec 23 04:00:00 EST 1986

OSTI ID:6986288

Jones, III, R W

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; EDB-87-029132; NOV-87-040714
• Patent Number(s): US 4631136
• OSTI ID: 6986288
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ADDITIVES
ANTIOXIDANTS
ASCORBIC ACID
BENTONITE
CARBON
CARBOXYLIC ACID ESTERS
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CITRIC ACID
CLAYS
COLLOIDS
CONTAINERS
DISPERSIONS
DRILLING FLUIDS
ELEMENTS
EMULSIFIERS
EMULSIONS
ESTERS
FLUIDS
FRICTION
HYDROGEN COMPOUNDS
HYDROXY ACIDS
INORGANIC ACIDS
MEDIUM TEMPERATURE
MIXERS
MIXING
NATURAL GAS WELLS
NONMETALS
OIL WELLS
OILS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PHOSPHORIC ACID
SYNTHESIS
VEGETABLE OILS
VITAMINS
WELLS