Waste disposal of contaminated drill cuttings from geological drilling using drilling fluid systems containing mineral oil

US5755892A · kind A · utility

Assignees

• Henkel Kommanditgesellschaft auf Aktien · DE
• Baroid Limited · GB

Inventors

• Claus-Peter Herold · Mettmann, DE
• Heinz Mueller · Monheim, DE
• Stephan von Tapavizca · Erkrath, DE
• Malcolm Ellice · Aberdeen, GB
• Douglas J. Grimes · Fulford, GB

Key dates

• Filing date: Jan 15, 1997
• Grant date: May 26, 1998
• Expiry date: Jan 15, 2017

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B21/068
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

Described is the use of ecologically compatible, and more particularly of biologically degradable, oils having flash points of above 80.degree. C. for washing mineral oil-loaded drill cuttings prior to the disposal thereof by off-shore and/or on-shore deposition. For the use as wash oils there are preferred aerobically and/or anaerobically degradable low-viscosity oils are employed which are also suitable for being used as a mixture component of the continuous oil phase of W/O invert drilling fluids.