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. 05, 2016
Filed:
Aug. 14, 2012
John Rasmus, Richmond, TX (US);
William Lesso, Anderson, TX (US);
John James, Houston, TX (US);
Edward M. Tollefsen, Katy, TX (US);
Scott Paul, Richmond, TX (US);
Amanda L. Weber, Oklahoma City, OK (US);
Marcus Turner, Sugar Land, TX (US);
John Rasmus, Richmond, TX (US);
William Lesso, Anderson, TX (US);
John James, Houston, TX (US);
Edward M. Tollefsen, Katy, TX (US);
Scott Paul, Richmond, TX (US);
Amanda L. Weber, Oklahoma City, OK (US);
Marcus Turner, Sugar Land, TX (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A method evaluating a cuttings density while drilling a subterranean wellbore includes acquiring first and second axially spaced pressure measurements in the wellbore. The pressure measurements may then be processed to obtain an interval density of drilling fluid between the measurement locations. A tool string including a large number of axially spaced pressure sensors (e.g., four or more or even six or more) electronically coupled with a surface processor via wired drill pipe may be used to obtain a plurality of interval densities corresponding to various wellbore intervals. The interval density may be measured while drilling and may be further processed to compute a cuttings density in the annulus. Moreover, changes in the computed interval density with time while drilling may be used as an indicator of a change in cuttings density.