CENTRALIZER FOR DOWNHOLE PROBES

摘要

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.

主权项

1. 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; and 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.