DOWNHOLE PROBE CENTRALIZER

摘要

An assembly for use in subsurface drilling includes a downhole probe supported in a drill string section by centralizing features of a centralizer that is slidably removable from the drill string section. The centralizer may comprise a tubular body having a bore defined through it. A bore wall of the centralizer is fluted to provide inward contact points that support the downhole probe. The downhole probe may be supported for substantially its entire length. The centralizer may optionally comprise and/or be coated with a vibration damping and/or electrically insulating material.

主权项

1. A downhole assembly comprising:
a drill string section having a bore extending longitudinally through the drill string section; a tubular centralizer removably disposed in the bore of the drill string section, the centralizer comprising a cylindrical body having a cylindrical outer surface dimensioned for a slip fit in the drill string section a bore extending longitudinally from an uphole end of the centralizer to a downhole end of the centralizer; and a downhole probe located in the bore of the centralizer; wherein the centralizer comprises centralizing ridges extending inwardly into the bore of the centralizer to contact the downhole probe and support the downhole probe in the bore of the centralizer, the centralizing ridges being arranged to provide passages for the flow of drilling fluid around an outside of the downhole probe between the centralizing ridges.