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. 03, 1990
Filed:
Jul. 27, 1989
Henk H Jelsma, Spring, TX (US);
Baroid Technology, Inc., Houston, TX (US);
Abstract
A downhole centralizer is provided for positioning along a drill pipe string passing through a deviated well bore. A centralizer body is connected to an upper sub by a plurality of lobe-shaped connectors which permit angular deviation of the central axis of the upper sub with respect to the central axis of the centralizer body. The centralizer body is preferably connected to a lower sub by similar lobe-shaped connectors. The opposite ends of each of the upper and lower subs are threaded for fixed engagement with respective upper and lower pipe joints in the tubular string. A flexible flow conduit is positioned within a passageway through the centralizer body, and a pair of upper and lower sealing member are provided to maintain sealed engagement between the respective upper and lower subs and the flow conduit for transmission of fluid through the centralizer. The centralizer of the present invention may be reliably used to center the tubing string within the deviated portion of a borehole, thereby reducing torque lossed to the drill bit and wear on the drill string.