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:
Aug. 25, 2009
Filed:
Feb. 05, 2008
William E. Brennan, Iii, Richmond, TX (US);
Colin Longfield, Houston, TX (US);
Alexis Arzoumanidis, Boston, MA (US);
Alessandro Caccialupi, Houston, TX (US);
William E. Brennan, III, Richmond, TX (US);
Colin Longfield, Houston, TX (US);
Alexis Arzoumanidis, Boston, MA (US);
Alessandro Caccialupi, Houston, TX (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
Conventional formation evaluation with dual inflatable packers includes the steps of pressurizing the packers so as to isolate an annular portion of the borehole wall, collecting one or more samples of formation fluid via the isolated portion of the borehole wall, and depressurizing the packers so as to permit movement of the mandrel within the borehole. A sampling method and apparatus that utilize one or more of the following to advantage is provided: restricting deformation of the packers during inflation using an annular bracing assembly; actively retracting the packers using ambient borehole pressure; and substantially centralizing the mandrel intermediate the packers so as to resist buckling of the mandrel.