Drilling fluids based on a mixture of sulfonated thermoplastic polymer and an amine-treated clay

Patent · Tue Jan 10 04:00:00 EST 1984

OSTI ID:7151847

Walker, T O; Lundberg, R D; Pfeiffer, D G; Thaler, W A; Turner, R

The present invention relates to mixtures of sulfonated thermoplastic polymers and amine-treated clays 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 polymers have about 5 to about 100 meq. of sulfonate groups per 100 grams of the sulfonated thermoplastic polymer, 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 polymer, wherein the polar cosolvent increases the solubility of the sulfonated thermoplastic polymer in the oil drilling mud by decreasing the strong ionic interactions between the sulfonate groups of the sulfonated polymer.

• Assignee: Exxon Research and Engineering Co.
• Patent Number(s): US 4425463
• OSTI ID: 7151847
• 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
AMINES
AMMONIA
CATIONS
CHARGED PARTICLES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CLAYS
CONTROL
COOLING
CUTTINGS REMOVAL
DRILL BITS
DRILLING EQUIPMENT
DRILLING FLUIDS
EQUIPMENT
FLUIDS
HYDRIDES
HYDROGEN COMPOUNDS
ION EXCHANGE
IONS
MATERIALS
NATURAL GAS WELLS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLAR COMPOUNDS
POLYMERS
PRESSURE CONTROL
REMOVAL
SOLUBILITY
SULFONATION
SYNTHETIC MATERIALS
THERMOPLASTICS
VISCOSITY
WELLS