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. 08, 2003
Filed:
Mar. 02, 2001
Applicant:
Inventors:
Robert K. Meek, Bakersfield, CA (US);
Rex E. Duhn, Bakersfield, CA (US);
Assignee:
Duhn Oil Tool, Inc., Bakersfield, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 3/304 ;
U.S. Cl.
CPC ...
E21B 3/304 ;
Abstract
A mandrel rotator is provided is mounted in a housing for coupling to a well casing head. The mandrel rotator comprises of an annular gear having external gear teeth and an axial opening. The annular gear is coupled to a mandrel outer surface, such that rotation of the annular gear causes rotation of the mandrel. A retainer limits or prevents axial movement of gear within the housing. A second gear is coupled to the annular gear for rotating the annular gear.