Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along...
Patent
1989-07-27
1990-07-03
Dang, Hoang C.
Boring or penetrating the earth
Means traveling with tool to constrain tool to bore along...
175 76, 175325, E21B 708, E21B 1710, E21B 1720
Patent
active
049382993
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.
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Baroid Technology Inc.
Dang Hoang C.
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