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:
Jun. 03, 2014
Filed:
Mar. 14, 2013
Applicant:
Dura Drilling, Inc., Bozeman, MT (US);
Inventor:
Robert E. Able, Bozeman, MT (US);
Assignee:
Dura Drilling, Inc., Bozeman, MT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 17/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A drilling system for boring into ground includes a bottom hole assembly having a rotatable casing shoe, an independently rotatable driveshaft disposed within the casing shoe, and a bearing housing interdisposed between the driveshaft and the casing shoe to control a distance between a centerline of the driveshaft and a centerline of the casing shoe. The driveshaft includes a bit disposed at a distal end thereof, extending beyond the casing shoe distal end. The driveshaft centerline and the casing shoe centerline are substantially parallel and radially offset.