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. 11, 2006
Filed:
Jan. 05, 2001
Rory Mccrae Tulloch, Aberdeen, GB;
James Bain, Montrose, GB;
Binnert Ruerd Haites, Aberdeen, GB;
Mike Wardley, Aberdeen, GB;
Rory McCrae Tulloch, Aberdeen, GB;
James Bain, Montrose, GB;
Binnert Ruerd Haites, Aberdeen, GB;
Mike Wardley, Aberdeen, GB;
Weatherford/Lamb, Inc., Houston, TX (US);
Abstract
A tool for reducing torque on work string, eg for gas or oil production, comprises an upper clamp (), a lower clamp () and connection means (), the three components formed as a unitary structure (). The tool also comprises bearing means, preferably made from an elastomeric compound, and an annular body () (see FIG.) held in place over the connection means by the clamps. The clamps may comprise spigots () for retaining the connection means. In a preferred embodiment the annular body is in two semi-annular components connected at one end to allow them to pivot, and the other end comprises mating castellations for receiving a fastening pin. The annular body may comprise a number of replaceable wear pads () which may be made of bronze or an elastomer. The unitary structure of the tool enhances the integral strength and efficiency of the clamps.