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:
Jan. 11, 2005
Filed:
Jan. 22, 2003
Nuclear magnetic resonance apparatus and methods for analyzing fluids extracted from earth formation
David P. Madio, Danbury, CT (US);
Robert L. Kleinberg, Ridgefield, CT (US);
Richard W. Gaylor, Brookfield, CT (US);
Robert Freedman, Houston, TX (US);
David P. Madio, Danbury, CT (US);
Robert L. Kleinberg, Ridgefield, CT (US);
Richard W. Gaylor, Brookfield, CT (US);
Robert Freedman, Houston, TX (US);
Schlumberger Technology Corporation, Ridgefield, CT (US);
Abstract
The present invention discloses a method and apparatus to make a nuclear magnetic resonance measurement on a flowing fluid using varied wait times. In one method, NMR measurements are made by: a) flowing the fluid through a static magnetic field; b) applying a group of oscillating magnetic field pulses to the flowing fluid, wherein the group of pulses is comprised of an initial pulse and one or more refocusing pulses; c) detecting magnetic resonance signals from the flowing fluid; d) after a wait time, repeating (b) and (c) one or more times, wherein at least two of the repetitions have varied wait times; and e) analyzing the detected magnetic resonance signals to extract information about the flowing fluid. Further, varied wait time measurements may be useful in determining the flow rate of the sample.