Halliburton Company

Edith Scott

Stephen W Almond

Weldon M Harms

The present invention provides a method for treating coal seams to improve dewatering to enhance gas production therefrom. The treatment is effected by contacting the coal with an effective amount of a selected additive comprises at least one member selected from the group consisting of benzyl coco di-(hydroxyethyl) quaternary amine, p-T-amyl-phenol condensed with formaldehyde and a copolymer comprising from about 80 to about 100% C.sub.1-30 alkyl methacrylate monomers and from about 0 to about 20% hydrophilic monomers.

Method for stimulating methane production from coal seams

A method of rendering a water soluble anionic polymer more dispersible in water. The method is carried out by mixing in a polar liquid the water soluble anionic polymers and cationic or amphoteric polymers to form a mixture. When the cationic or amphoteric polymer is added to the anionic polymer in an amount of from about 25 to about 75 percent by weight of the anionic polymer, the salt is added to the mixture in order to hydrate the anionic polymers.

Method of improving the dispersibility of water soluble anionic polymers

A composition and method for stimulating a subterranean formation. The composition contains an anionic polymer which is readily dispersible in water, having a molecular weight sufficient to thicken water, and a cationic or amphoteric polymer or mixtures thereof.

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Duncan, OK, United States of America

Edith Scott