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:
Nov. 23, 2021
Filed:
Oct. 16, 2019
Applicant:
Vermeer Manufacturing Company, Pella, IA (US);
Inventor:
Tyler J. Dorin, Pleasant Hill, IA (US);
Assignee:
Vermeer Manufacturing Company, Pella, IA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 7/04 (2006.01); E21B 7/06 (2006.01); E21B 17/046 (2006.01);
U.S. Cl.
CPC ...
E21B 17/046 (2013.01); E21B 7/046 (2013.01); E21B 7/062 (2013.01);
Abstract
A horizontal directional drilling system includes a drill head that includes a drive coupling with a central bore that is a through bore. The drill head includes a drive shaft that has an enlarged portion at a downhole end that defines a centroid positioned within the central bore of the drive coupling. The drive shaft includes a drive shaft axis that is misaligned and intersects with an end casing axis of an end casing at a balance point of the drill head. The centroid of the drive shaft is positioned to be coincident with the balance point of the drill head.