Wells – Guide for device or conduit – Surrounding existing device or tubing
Reexamination Certificate
2008-04-15
2008-04-15
Bagnell, David (Department: 3676)
Wells
Guide for device or conduit
Surrounding existing device or tubing
C175S325500
Reexamination Certificate
active
10312605
ABSTRACT:
An improved centralizer is provided for centralization of tubulars such as casings, liners, production tubing, and production screens, in oil/gas wells. Such a centralizer comprises a tubular body, wherein a portion of an outermost surface of the tubular body is formed from a first material, and a portion of, or portion adjacent to, at least one end of the tubular body, and/or a portion of an innermost surface of the tubular body) is formed from at least one second material, in contrast to unitary construction centralizers disclosed by the prior art, and the first material has a lower Young's modulus than the at least one second material.
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International Search Report for PCT/GB01/02855, completed Sep. 5, 2001.
Alston & Bird LLP
Bagnell David
Bomar Shane
Brunel Oilfield Services (UK) Limited
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