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:
Feb. 24, 2015
Filed:
Oct. 03, 2011
Ankur Prakash, Lucknow, IN;
John C. Rasmus, Richmond, TX (US);
Richard J. Radtke, Pearland, TX (US);
Michael Evans, Missouri City, TX (US);
Lee Dolman, L'Etang la Ville, FR;
Ankur Prakash, Lucknow, IN;
John C. Rasmus, Richmond, TX (US);
Richard J. Radtke, Pearland, TX (US);
Michael Evans, Missouri City, TX (US);
Lee Dolman, L'Etang la Ville, FR;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
Downhole drilling fluid measurements are made as a function of time or as a function of depth. A change in the downhole drilling fluid measurements is correlated to a feature of a formation penetrated by a drill bit or to a feature of fluids in the formation. The downhole drilling fluid measurements may include density, photoelectric factor, hydrogen index, salinity, thermal neutron capture cross section (Sigma), resistivity, slowness, slowing down time, sound velocity, and elemental composition. The feature may include fluid balance, hole-cleaning, a kick, a shallow water flow, a formation fluid property, formation fluid typing, geosteering, geostopping, or an environmental correction. A downhole system has a measurement-while-drilling tool or a logging-while-drilling tool and a processor capable of obtaining the downhole drilling fluid measurements and correlating the change in the downhole drilling fluid measurements.