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:
Dec. 07, 1999
Filed:
Oct. 30, 1997
Applicant:
Inventors:
Richard J Pearce, Gainesville, FL (US);
William C Grindstaff, Gainesville, FL (US);
James D Madden, Micanopy, FL (US);
Assignee:
Driltech Inc., Alachua, FL (US);
Primary Examiner:
Int. Cl.
CPC ...
B25B / ;
U.S. Cl.
CPC ...
81 5719 ; 81 572 ; 81 5734 ;
Abstract
Pipe sections of a drill string are unscrewed by holding one pipe section stationary in a clamping arm, and rotating another pipe section by a turning wrench. The clamping arm includes an adapter that can be replaced by similar adapters sized for different pipe diameter. The turning wrench includes a lug arranged to be contacted by a piston rod and rotated thereby for breaking the bond between the pipe sections.