Centralizer for downhole probes
AssigneeEvolution Engineering Inc.
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.
Claims20
A centralizer for supporting an electronics package within a bore of a drill string in combination with the electronics package:
- the centralizer comprising a tubular member having a wall formed to divide an annular space within the bore surrounding the electronics package into a first plurality of inner channels inside the wall of the centralizer and a second plurality of outer channels outside the wall of the centralizer wherein each of the inner channels lies between two of the outer channels and is separated from the outer channels by a part of the wall of the centralizer;
- wherein the centralizer is sized to snuggly grip the electronics package;
- and
- wherein insertion of the electronics package into the centralizer resiliently deforms the material of the centralizer.
A centralizer for supporting an electronics package within a bore of a drill string in combination with the electronics package:
- the centralizer comprising a tubular member having a wall formed to divide an annular space within the bore surrounding the electronics package into a first plurality of inner channels inside the wall of the centralizer and a second plurality of outer channels outside the wall of the centralizer wherein each of the inner channels lies between two of the outer channels and is separated from the outer channels by a part of the wall of the centralizer;
- the electronics package inserted longitudinally into the centralizer wherein the wall of the centralizer comprises curved, pre-tensioned flexed parts that tend to exert a restoring force that urges the electronics package back to a centralized equilibrium position when the electronics package is moved out of the equilibrium position.
A centralizer for supporting an electronics package within a bore of a drill string in combination with the electronics package:
- the centralizer comprising a tubular member having a wall formed to divide an annular space within the bore surrounding the electronics package into a first plurality of inner channels inside the wall of the centralizer and a second plurality of outer channels outside the wall of the centralizer wherein each of the inner channels lies between two of the outer channels and is separated from the outer channels by a part of the wall of the centralizer and wherein the centralizer comprises a plurality of sections;
- the electronics package received inside the wall of the centralizer wherein the plurality of sections extend substantially continuously for at least 60% of an unsupported portion of the electronics package.
A centralizer for supporting an electronics package within a bore of a drill string, the centralizer comprising a tubular member having a wall formed to divide an annular space within the bore surrounding the electronics package into a first plurality of inner channels inside the wall of the centralizer and a second plurality of outer channels outside the wall of the centralizer wherein each of the inner channels lies between two of the outer channels and is separated from the outer channels by a part of the wall of the centralizer and wherein the wall of the centralizer is provided with apertures or holes.
Dependencies are inferred from the claim text.