Environmentally safe annular fluid

US5607901A · kind A · utility

Assignee

• BP Exploration & Oil, Inc. · US

Inventors

• John Toups · Saginaw, US
• David B. Young · Toronto, CA
• Majeed H. Yousif · Kyle, US
• B. C. Smolen · Houston, US
• Jonathan Holt · Houston, US

Key dates

• Filing date: Feb 17, 1995
• Grant date: Mar 4, 1997
• Expiry date: Feb 17, 2015

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B36/003
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An environmentally acceptable, thermally insulating annular fluid comprised of a liquid which is non-aqueous, non-corrosive, and thermally insulating, a clay gellant, and a clay dispersant. A preferred packer fluid includes an ester originated from a vegetable or animal oil as at least a major portion of the liquid phase.