Abstract: A particular simple method and class of organic polycationic polymer compositions are provided for treating earthen formations such as in oil wells to stabilize clay against dispersion and expansion due to water.

Abstract: A method of enhanced oil recovery from subterranean oil-containing formations via injection through an injection well penetrating the formation of a viscous aqueous solution containing one or more water-soluble organic polymers and forcing such solution through the formation towards a production well for ultimate recovery. The viscous aqueous polymer solutions of the invention are prepared at the site of their use by polymerizing one or more water-soluble polymerizable vinyl monomers in aqueous solutions which may contain high concentrations of one or more salts.

Abstract: Methods of forming isocyanate polymers having long gellation times in the presence of water without the formation of excess foam.

Abstract: A particular simple method and class of organic polycationic polymer compositions are provided for treating earthen formations such as in oil wells to stabilize clay against dispersion and expansion due to water.

Abstract: A particular simple method and class of organic polycationic polymer compositions are provided for treating earthen formations such as in oil wells to stabilize clay against dispersion and expansion due to water.

Abstract: A particular simple method and class of organic polycationic polymer compositions are provided for treating earthen formations such as in oil wells to stabilize clay against dispersion and expansion due to water.

Abstract: Methods of sealing particular areas, including subterranean well formations, are provided wherein the methods utilize an isocyanate polymer suitable as a sealing agent having a controllable gelation time in the presence of water without formation of excess foam by using one or more typical di- or polyisocyanates with one or more alcoholic or acidic compounds and a particular catalyst namely, triethylene-diamine, Groups 3 and 4 metal-organic compounds or mixtures thereof. A particularly useful catalyst is tributyl titanate.

Abstract: A particular simple method and class of organic polycationic polymer compositions are provided for treating earthen formations such as in oil wells to stabilize clay against dispersion and expansion due to water.

Abstract: A particular simple method and class of organic polycationic polymer compositions are provided for treating earthen formations such as in oil wells to stabilize clay against dispersion and expansion due to water.

Abstract: Energy level or temperature activated aqueous silicate compositions which gel into impermeable masses at preselected temperatures and processes of selectively forming such gels are provided using as temperature responsive gel activators certain halogenated hydrocarbons with solubilizing groups of hydrogen, carbinol, sulfonyl, aldehyde, ester and carboxyl radicals, the acid equivalents of such radicals or combinations of such radicals and acid equivalents.

Abstract: Particular methods and compositions are provided for producing an isocyanate polymer suitable as a sealing agent by using one or more typical di- or polyisocyanates with one or more alcoholic or acidic compounds and a particular catalyst namely, triethylenediamine, Groups 3 and 4 metal-organic compounds or mixtures thereof.