Clay inhibitors for the drilling industry

US9034801B2 · kind B2 · utility

Assignee

• LAMBERTI SPA · IT

Inventors

• Luigi Merli · Saronno, IT
• Franscesca Giani · Cassano Magnago, IT
• Pierangelo Pirovano · Cassano Magnago, IT
• Giovanni Floridi · Novara, IT
• Giuseppe Li Bassi · Varese, IT

Key dates

• Filing date: Jun 18, 2013
• Grant date: May 19, 2015
• Expiry date: Aug 6, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2208/12
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The hydration of clays in drilling operations can be inhibited by employing an aqueous based drilling fluid containing from about 0.2 to about 5 wt % of a hydration inhibitor that comprises bis-hexamethylene-triamine, bis-hexamethylene-triamine salts, or mixtures thereof.