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:
May. 02, 2006
Filed:
Oct. 10, 2002
Applicants:
Chad D. Cannan, Georgetown, TX (US);
Thomas C. Palamara, Eufaula, AL (US);
Inventors:
Chad D. Cannan, Georgetown, TX (US);
Thomas C. Palamara, Eufaula, AL (US);
Assignee:
CARBO Ceramics Inc., Irving, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B 43/267 (2006.01);
U.S. Cl.
CPC ...
Abstract
A low density, spherical proppant made from kaolin clay having an alumina content distributed homogeneously throughout the pellets, an apparent specific gravity of from about 1.60 to about 2.10 g/cc, and a bulk density of from about 0.95 to about 1.30 g/cc. The low density is achieved by controlling the time and temperature of the firing process to be from about 1200 to about 1350° C. This low density proppant is useful in hydraulic fracturing of shallow oil and gas wells.