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:
Aug. 17, 2004
Filed:
May. 02, 2000
Applicant:
Inventors:
David B. Mason, Anaheim Hills, CA (US);
George Boyadjieff, Bell Park, CA (US);
Johannes Henricus Antonius Marie Kamp, Etten-Leur, NL;
Ronaldus Richardus Maria Roling, Rosmalen, NL;
Assignee:
Varco I/P, Inc, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25B 1/350 ;
U.S. Cl.
CPC ...
B25B 1/350 ;
Abstract
An iron roughneck has a pair of upper jaws carrying pipe gripping dies for gripping tool joints. The jaws have recesses formed on each side of the pipe gripping dies to receive spinning rollers. By positioning the spinning rollers in the upper jaws at the same level as pipe gripping dies, the spinning rollers are able to engage the pipe closer to the lower jaws and thus can act on the tool joint rather than on the pipe stem.