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:
Jul. 05, 2005
Filed:
Nov. 21, 2002
Applicants:
Coy M. Fielder, Cypress, TX (US);
Rogerio H. Silva, Spring, TX (US);
Inventors:
Coy M. Fielder, Cypress, TX (US);
Rogerio H. Silva, Spring, TX (US);
Assignee:
ReedEycalog, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B010/26 ;
U.S. Cl.
CPC ...
Abstract
An improved bi-center with improved directional stability and wear resistance is disclosed, said bit optimally utilizing a plurality of shaped PDC cutting elements selectively situated about the cutting surfaces of the pilot and the reamer to produce a minimal force imbalance, where further said pilot bit and the reamer are force balanced to further reduce imbalance in the operation of the tool.