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. 02, 2010
Filed:
Nov. 21, 2003
Peter Wraight, Skillman, NJ (US);
Roger Griffiths, Abu Dhabi, AE;
Kenneth Stephenson, Newtown, CT (US);
Peter Wraight, Skillman, NJ (US);
Roger Griffiths, Abu Dhabi, AE;
Kenneth Stephenson, Newtown, CT (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
The invention relates to methods and apparatus for determining downhole mud flow rates and other downhole parameters. A method for determining a downhole parameter includes operating a pulsed neutron generator (), pulsing the pulsed neutron generator () off, detecting a substantially unactivated drilling fluid slug at a known distance (d) from the pulsed neutron generator (), and determining a time-of-flight (t) for the unactivated drilling fluid slug to travel from the pulsed neutron generator () to a detection point.