High temperature drilling fluids based on sulfonated thermoplastic polymers
An oil-based drilling mud is described which consists of: (a) a hydrocarbon oil; (b) about 1 to about 10 parts by weight of water per 100 parts by weight of the hydrocarbon oil; (c) about 20 to about 50 lb/bbl of at least one emulsifier; (d) weighting material necessary to achieve the desired density; and (e) about 0.25 to about 4.0 lb/bbl of a water insoluble and oil insoluble neutralized sulfonated thermoplastic polymer having a molecular weight as measured by GPC of about 5,000 to about 500,000, the water insoluble and oil insoluble neutralized sulfonated thermoplastic polymer having about 5 to about 100 meq. of sulfonate groups per 100 grams of the neutralized sulfonated thermoplastic polymer. The water insoluble and oil insoluble sulfonated thermoplastic is derived from a polymer selected from the group consisting of polystyrene, poly-t-butyl-styrene, polychlorostyrene, poly-alpha methyl styrene, polyvinyl toluene and co- or terpolymers of styrene and acrylonitrile, methyl methacrylate and butadiene.
- Assignee:
- Exxon Res. and Eng. Co., Florham Park, NJ
- Patent Number(s):
- US 4579669
- OSTI ID:
- 5839570
- Resource Relation:
- Patent File Date: Filed date 16 Apr 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
DRILLING FLUIDS
CHEMICAL COMPOSITION
ACRYLONITRILE
BUTADIENE
DENSITY
EMULSIFIERS
HYDROCARBONS
METHYL METHACRYLATE
NATURAL GAS WELLS
OIL WELLS
POLYSTYRENE
QUANTITY RATIO
SULFONATION
THERMOPLASTICS
TOLUENE
ADDITIVES
ALKYLATED AROMATICS
AROMATICS
CARBOXYLIC ACID ESTERS
CHEMICAL REACTIONS
DIENES
ESTERS
FLUIDS
MATERIALS
METHACRYLIC ACID ESTERS
NITRILES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PLASTICS
POLYENES
POLYMERS
POLYOLEFINS
POLYVINYLS
SYNTHETIC MATERIALS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing