Self-adaptive cements

US8844628B2 · kind B2 · utility

Assignee

• SCHLUMBERGER TECHNOLOGY CORPORATION · US

Inventors

• Sylvaine Le Roy-Delage · Paris, FR
• Laure Martin · Paris, FR

Key dates

• Filing date: Jan 24, 2012
• Grant date: Sep 30, 2014
• Expiry date: Oct 25, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B28/02
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A self-adaptive cement formulation includes cement, water and asphaltite-mineral particles. The set cement demonstrates self-healing properties when exposed to methane, and is particularly suited for well-cementing applications. After placement and curing, the self-healing properties help maintain zonal isolation should bonding be disrupted between the set cement and the formation or a casing string, should cracks or defects appear in the set-cement matrix, or both.