Drilling fluids based on sulfonated elastomeric polymers

Details Drilling fluids based on sulfonated elastomeric polymers Drilling fluids based on sulfonated elastomeric polymers

1982-09-13

1984-01-10

Griffin, Ronald W.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

252 85M, 252 85A, 252 85C, 524423, 524574, 524576, C08K 324, C08L 2508, C09K 702

Patent

active

044254628

ABSTRACT:
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.

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International Publication Number WO81/00850, Published under The Patent Cooperative Treaty (PCT) Apr. 2, 1981, 44 pages spec., 5 pages drawings, pp. 1-15 relied upon.

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