Biodegradable anti-accretion additive for water-based drilling fluids

US10308858B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Andrea Assmann · Unterreit, DE
• Roland Reichenbach-Klinke · Traunstein, DE
• Jutta Karin Langlotz · Trostberg, DE

Key dates

• Filing date: Jun 5, 2013
• Grant date: Jun 4, 2019
• Expiry date: Jul 24, 2034

Classification

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

Abstract

The use of gelatin-based copolymers containing at least one grafted side chain formed from ethylenically unsaturated compounds as an anti-accretion additive is proposed for water-based drilling fluids in the development, exploitation and completion of underground mineral oil and natural gas deposits and in deep wells. These copolymers are water-soluble and have good biodegradability.