Drilling fluids based on sulfonated elastomeric polymers

Patent · Tue Jan 10 04:00:00 EST 1984

OSTI ID:7151853

Turner, S R; Lundberg, R D; Walker, T O

The present invention relates to sulfonated elastomeric polymers which are copolymers of isoprene and sodium styrene sulfonate or teropolymers of isoprene, styrene and sodium styrene sulfonate wherein these sulfonated polymers 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 and elastomeric polymers have about 5 to about 100 meq. of sulfonate groups per 100 grams of the sulfonated elastomeric 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 elastomeric polymer, wherein the polar cosolvent increases the solubility of the sulfonated elastomeric 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 4425462
• OSTI ID: 7151853
• 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
ALKALI METAL COMPOUNDS
AROMATICS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CONTROL
COOLING
CUTTINGS REMOVAL
DIENES
DRILL BITS
DRILLING EQUIPMENT
DRILLING FLUIDS
ELASTOMERS
EQUIPMENT
FLUIDS
HYDROCARBONS
ION EXCHANGE
ISOPRENE
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POLAR COMPOUNDS
POLYENES
POLYMERS
PRESSURE CONTROL
REMOVAL
SODIUM COMPOUNDS
SODIUM SULFATES
SOLUBILITY
STYRENE
SULFATES
SULFONATION
SULFUR COMPOUNDS