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:
Jul. 04, 1989
Filed:
Mar. 09, 1987
Applicant:
Inventor:
Michael C Dinsdale, Dallas, TX (US);
Assignee:
National-Oilwell, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25B / ;
U.S. Cl.
CPC ...
81 5734 ; 166 775 ; 175 85 ;
Abstract
An apparatus for making and breaking threaded well pipe connections has a stationary support mountable on a rig floor and positioning arms mounted on the stationary support. The positioning arms selectively support and position a movable frame which carries power tongs for clamping pipes. By operation of the positioning arms, the power tongs can be operatively disposed to act on a pipe at the well center, positioned in a stowed position or disposed in a mousehole position to act on a pipe in the mousehole.