The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 27, 2012
Filed:
Aug. 28, 2008
John Edwards, Ruwi, OM;
Christian Stoller, Princeton Junction, NJ (US);
Peter Wraight, Skillman, NJ (US);
Roger Griffiths, Schaffhausen, CH;
Nicolas Renoux, Vesailles, FR;
John Edwards, Ruwi, OM;
Christian Stoller, Princeton Junction, NJ (US);
Peter Wraight, Skillman, NJ (US);
Roger Griffiths, Schaffhausen, CH;
Nicolas Renoux, Vesailles, FR;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
The invention relates to methods and apparatus for determining a downhole parameter in an underbalanced drilling environment which include: selectively activating a first fluid flowing from the formation through a wellbore while under balanced drilled; detecting the activated first fluid, and determining a depth at which said fluid enters the wellbore.