Formation testing

US8763696B2 · kind B2 · utility

Inventors

• Sylvain Bedouet · Houston, US
• Karre Otto Eriksen · Stavanger, NO

Key dates

• Filing date: Jan 4, 2011
• Grant date: Jul 1, 2014
• Expiry date: Jun 26, 2032

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B49/10
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

Formation testing which may involve circulating mud in a pipe string from a mud pit through a port in the pipe string to a downhole diverter sub, wherein the pipe string is suspended in a wellbore extending into a subterranean formation, operating a downhole pump to pump formation fluid from the formation, wherein the formation fluid comprises gas, and mixing the pumped formation fluid with circulated mud such that a proportion of the pumped formation gas in the circulated mud is maintained below a threshold value.