Downhole tool

Details Downhole tool Downhole tool

2006-12-05

2006-12-05

Bagnell, David (Department: 3672)

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

C175S076000, C166S241100

Reexamination Certificate

active

07143848

ABSTRACT:
An expandable centralizer is disclosed having a body having a first portion of circular cross-section and a second portion of polyhedral cross-section. Centralizing members are arranged on the faces of the second portion which, in a first position, limit the diameter of the tool so that it can pass through small openings in a wellbore. The centralizing members can then be moved hydraulically across the faces to extend and provide support for the expandable downhole tool in larger openings within the wellbore.

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patent: 6679328 (2004-01-01), Davis et al.
patent: 2004/0112587 (2004-06-01), Van Drentham Susman et al.
patent: 2004/0195007 (2004-10-01), Eppink

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