Hydrogels derived from acrylamide for controlling circulation losses and methods of fabrication thereof

US11787909B2 · kind B2 · utility

Assignees

• YPF TECNOLOGÍA S.A. · AR
• UNIVERSIDAD DE BUENOS AIRES · AR
• CONSEJO NACIONAL DE INVESTIGACIONES CIENTÍFICAS Y TÉCNICAS (CONICET) · AR

Inventors

• Joana Elisa TASQUE · Salsipuedes, AR
• Pablo Alejandro Raffo · Dieciséis de Julio, AR
• Isabel Natalia VEGA · Dieciséis de Julio, AR
• Norma Beatriz D'ACCORSO · Dieciséis de Julio, AR
• Darío Alberto Contrera · Ezeiza, AR

Key dates

• Filing date: Dec 23, 2019
• Grant date: Oct 17, 2023
• Expiry date: Dec 23, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2208/10
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Acrylamide-derived hydrogels and methods of fabrication thereof from an acrylic monomer, a crosslinking agent comprising an organosilicon compound, a polymerization initiator, a solvent and a polymerization accelerator, as well as their use in controlling circulation losses. The obtained hydrogels interact with the walls of the reservoir and exhibits an increase in viscosity, either at delayed times or in response to a given stimulus, such as changes in temperature, pressure, pH, salinity, using a simple and easily scalable methodology.