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US 2019/0203545 A1Published application
Centralizer for downhole probes
AssigneeEvolution Engineering Inc.
InventorsAaron W. LOGAN, Justin C. LOGAN, Patrick R. DERKACZ
Life of this patent
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Abstract
An assembly for use in subsurface drilling includes a downhole 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.
Claims20
A centralizer for use in subsurface drilling, the centralizer comprising:
- an elongated tubular member having a wall formed to provide a cross-section that provides first outwardly-convex and inwardly-concave lobes, the first lobes arranged to contact a bore wall of a bore in a section of drill string at a plurality of spots spaced apart around a circumference of the bore wall;
- a plurality of inwardly-projecting portions, each of the plurality of inwardly-projecting portions arranged between two adjacent ones of the plurality of first lobes;
- and
- one or more notches formed in one end of the tubular member and configured to anchor the centralizer against rotation in the bore.
1 more element
Dependencies are inferred from the claim text.