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. 13, 2010
Filed:
May. 24, 2007
Applicants:
Robin Carlson, Pella, IA (US);
Randy R. Runquist, Knoxville, IA (US);
Tod J. Michael, Chariton, IA (US);
Shawn Moyer, University Park, IA (US);
Inventors:
Robin Carlson, Pella, IA (US);
Randy R. Runquist, Knoxville, IA (US);
Tod J. Michael, Chariton, IA (US);
Shawn Moyer, University Park, IA (US);
Assignee:
Vermeer Manufacturing Company, Pella, IA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 17/18 (2006.01); E21B 21/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A drill rod assembly including inner and outer drill rods. The drill rod assembly further including flow passages that are in fluid communication with an annular fluid flow path defined between the inner and outer drill rods. The passages preventing blockage of a drill string fluid flow path when a number of drill rod assemblies are interconnected to form a drill string.