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. 13, 2013
Filed:
Apr. 30, 2008
Murat Ocalan, Boston, MA (US);
Huilin Tu, Cambridge, MA (US);
Nathan Wicks, Somerville, MA (US);
Agathe Robisson, Cambridge, MA (US);
Dominique Guillot, Somerville, MA (US);
Murat Ocalan, Boston, MA (US);
Huilin Tu, Cambridge, MA (US);
Nathan Wicks, Somerville, MA (US);
Agathe Robisson, Cambridge, MA (US);
Dominique Guillot, Somerville, MA (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A field-responsive fluid which enters a semi-solid state in the presence of an energy field is improved by use of a plurality of energy field responsive particles which form chains in response to the energy field. The particles can be (a) composite particles in which at least one field-responsive member having a first density is attached to at least one member having a second density that is lower than the first density, (b) shaped particles in which at least one field-responsive member has one or more inclusions, and (c) combinations thereof. The particles improve the field-responsive fluid by reducing density without eliminating field-responsive properties which afford utility. Further, a multi-phase base fluid including a mixture of two or more substances, at least two of which are immiscible, may be used. The multi-phase base fluid improves the field-responsive fluid because surface tension between the boundaries of the immiscible substances in conjunction with chains formed by field-responsive particles tends to stop or retard creep flow, resulting an improved dynamic or static seal.