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US 12,297,735 B2Granted
Centralizer for downhole probes
AssigneeBaker Hughes Canada Company
InventorsAaron W. Logan, Justin C. Logan, Patrick R. Derkacz
Life of this patent
Estimating the term…
Abstract
An assembly for use in subsurface drilling includes a downhole probe supported by a centralizer. The centralizer comprises a tubular member that extends around the downhole probe. A wall of the centralizer is fluted to provide inward contact points that support the downhole probe and outward contact points that bear against a bore wall of a section of drill string. The downhole probe may be supported for substantially its entire length.
Claims24
A downhole assembly comprising:
- a drill string section having a bore extending longitudinally through the drill string section, the bore having a bore diameter;
- a downhole probe located in the bore of the drill string section;
- and
- a centralizer in the bore, the centralizer comprising a plurality of tubular members, each of the plurality of tubular members having a tubular member wall extending around the downhole probe, the tubular member walls formed to contact an inside wall surface of the bore and an outside surface of the downhole probe, a cross-section of each of the tubular member walls following a path around the downhole probe that zig zags back and forth between the outside surface of the downhole probe and the inside wall surface of the bore;
- wherein the plurality of tubular members in an uninstalled configuration have outermost points lying on a circle with a circle diameter larger than the bore diameter.
2 more elements
A downhole assembly comprising:
- a drill string section having a bore extending longitudinally through the drill string section, the bore having a bore diameter;
- a downhole probe located in the bore of the drill string section;
- and
- a centralizer in the bore, the centralizer comprising a plurality of centralizer members arranged end to end, each of the plurality of centralizer members formed to contact an inner wall of the bore along a length of each of the plurality of centralizer members at a first plurality of locations spaced apart around a circumference of the bore and the downhole probe along the length of each of the plurality of centralizer members at a second plurality of locations spaced apart around a circumference of the downhole probe, wherein each of the plurality of centralizer members in an uninstalled configuration has outermost points lying on a circle with a circle diameter larger than the bore diameter.
1 more element
Dependencies are inferred from the claim text.