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:
Apr. 26, 2011
Filed:
Dec. 20, 2006
Applicants:
Matthew J. Miller, Cambridge, GB;
Dean M. Willberg, Tucson, AZ (US);
Anatoly Vladimirovich Medvedev, Moscow, RU;
Marina Nikolaevna Bulova, Edmonton, CA;
Inventors:
Matthew J. Miller, Cambridge, GB;
Dean M. Willberg, Tucson, AZ (US);
Anatoly Vladimirovich Medvedev, Moscow, RU;
Marina Nikolaevna Bulova, Edmonton, CA;
Assignee:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B 43/267 (2006.01); C09K 8/62 (2006.01); C09K 8/80 (2006.01);
U.S. Cl.
CPC ...
Abstract
A proppant consists of a core part and shell of a material different from the material of the core part. The shell comprises a soft material attached rigidly to the core part in such a way that the total surface area of the points where the shell and the core part are joined is less than the surface area of the core part.