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:
Sep. 09, 2003
Filed:
May. 19, 2001
Alan Martyn Eddison, Stonehaven, GB;
Andergauge Limited, Aberdeen, GB;
Abstract
A downhole tool ( ) for mounting on a drill string comprises: a mandrel ( ); a body ( ) axially movably mounted on the mandrel; and radially extendable members, such as stabiliser blades or cutters ( ), mounted in the body and being operatively associated with the mandrel such that relative axial movement of the mandrel and body induces radial movement of the members. Application of axial tension to the tool produces axial movement of the body relative to the mandrel, tending to retract the members from an extended configuration. The mandrel may be arranged to draw the members inwardly to permit positive retraction of the members from an extended configuration. Further, the body may define a channel ( ) and the mandrel and the members include an arrangement ( ) for maintaining a desired orientation of the members relative to the body channel.