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. 20, 2013
Filed:
Oct. 26, 2010
Garrett C. Casassa, Anaheim, CA (US);
Sarah B. Mitchell, Tustin, CA (US);
Norman Bruce Moore, Aliso Viejo, CA (US);
Garrett C. Casassa, Anaheim, CA (US);
Sarah B. Mitchell, Tustin, CA (US);
Norman Bruce Moore, Aliso Viejo, CA (US);
WWT International, Inc., Houston, TX (US);
Abstract
A non-rotating downhole sleeve adapted for open hole drilling and/or casing centralization. The sleeve includes a tubular body made of hard plastic with integrally formed helical blades positioned around its outer surface and an inner surface configuration which allows drilling fluid circulation to form a non-rotating fluid bearing between the sleeve and the drill pipe or casing. The helical blades reduce sliding and rotating torque while drilling, with minimal obstruction to drilling fluid passing through the borehole between the blades.