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Drilling fluids based on a mixture of a sulfonated thermoplastic polymer and a sulfonated elastomeric polymer

Patent ·
OSTI ID:6987487
; ; ; ;
The present invention relates to mixtures of sulfonated thermoplastic polymers and sulfonated elastomeric polymers which function as viscosification agents when added to oil-based drilling muds which are the fluids used to maintain pressure, cool drill bits, and lift cuttings from the holes in the drilling operation for oil and gas wells. The sulfonated thermoplastic and elastomeric polymers both have about 5 to about 200 meq. of sulfonate groups per 100 grams of the sulfonated thermoplastic or elastomeric polymers, wherein the sulfonated groups are neutralized with a metallic cation or an amine or ammonium counterion. A polar cosolvent can optionally be added to the mixture of oil drilling mud and sulfonated thermoplastic and elastomeric polymers, wherein the polar cosolvent increases the solubility of the sulfonated thermoplastic and elastomeric polymer in the oil drilling mud by decreasing the strong ionic interactions between the sulfonate groups of the sulfonated polymers.
Assignee:
Exxon Research and Engineering Co.
Patent Number(s):
US 4425461
OSTI ID:
6987487
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ADDITIVES
ALUMINIUM
AMMONIA
ANTIMONY
CATIONS
CHARGED PARTICLES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
DISPERSIONS
DRILLING FLUIDS
ELASTOMERS
ELEMENTS
EMULSIFIERS
FLUIDS
HYDRIDES
HYDROGEN COMPOUNDS
ION EXCHANGE
IONS
IRON
LEAD
MATERIALS
METALS
MIXTURES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SULFUR COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PH VALUE
PLASTICS
POLAR COMPOUNDS
POLYMERS
RHEOLOGY
SULFONATES
SULFONATION
SYNTHETIC MATERIALS
THERMOPLASTICS
TRANSITION ELEMENTS
VISCOSITY