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:
Jan. 25, 2022
Filed:
Apr. 15, 2019
Maxwell Oil Tools Ltd, Aberdeen, GB;
Richard Ronald Baynham, Marina di Ravenna, IT;
David Elrick Yule Levie, Kastanienbaum, CH;
X-Holding GmbH, Herford, DE;
Abstract
A modified tubular, particularly a drill pipe () has a composite non-rotating drill pipe protector assembly () including first and second composite collars () provided as cooperating parts positionable around the drill pipe () and bondable thereto using bonding agent, a non-rotating composite protector shell (), provided as cooperating shell parts and an internal polymeric radial bearing () which fits within a recess () within the non-rotating composite protector shell () and has an internal surface () configured to provide a plurality of internal fluid flow channels (). An external surface of the non-rotating composite protector shell () has blades (), spaced apart by fluid flow by-pass channels (). In use the rotation of the drill pipe facilitates fluid movement within the non-rotating composite protector shell by creating a pumping effect inducing ingress of fluid and through-flow within the internal polymeric radial bearing ().