Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
John Thomas Oliver Thornton0
Date of Patent
October 20, 2009
Patent Application Number
12047795
Date Filed
March 13, 2008
Patent Citations Received
Patent Primary Examiner
Patent 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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