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. 10, 2003
Filed:
Aug. 13, 2001
Applicant:
Inventors:
Monty H. Rial, Dallas, TX (US);
Lawrence W. Diamond, Rockwall, TX (US);
Harold E. Payne, Spring, TX (US);
Assignee:
CDX Gas, LLC, Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 1/062 ;
U.S. Cl.
CPC ...
E21B 1/062 ;
Abstract
An underreamer for forming a cavity within a well bore is provided. The underreamer may include a housing rotatably disposed within the well bore. The underreamer may also include a sleeve slidably positioned around the housing. The underreamer may further include at least one cutter set where each cutter set is pivotally coupled to the housing and the sleeve. An axial force applied to the sleeve operates to slide the sleeve relative to the housing and extend each cutter set from a retracted position radially outward relative to the housing to form the cavity when the housing is rotated.