Downhole tools

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2008-03-13

2009-10-20

Bomar, Shane (Department: 3676)

Wells

Processes

Placing or shifting well part

C166S241600, C166S278000, C175S325500

Reexamination Certificate

active

07604059

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.

REFERENCES:
patent: 2368415 (1945-01-01), Grant
patent: 2715552 (1955-08-01), Lane
patent: 3080926 (1963-03-01), Remp, Jr.
patent: 3268275 (1966-08-01), Laughlin
patent: 3981359 (1976-09-01), Fortenberry
patent: 4334834 (1982-06-01), Werner et al.
patent: 4399865 (1983-08-01), Anderson et al.
patent: 4796670 (1989-01-01), Russell et al.
patent: 4938299 (1990-07-01), Jelsma
patent: 5692562 (1997-12-01), Squires
patent: 5833018 (1998-11-01), Von Gynz-Rekowski
patent: 6032748 (2000-03-01), DeBray et al.
patent: 6435275 (2002-08-01), Kirk et al.
patent: 6666267 (2003-12-01), Charlton
patent: 7357178 (2008-04-01), Thornton
patent: 2 221 225 (1989-06-01), None
patent: 2 358 418 (2001-07-01), None
patent: 2 381 815 (2004-12-01), None
patent: 2 381 284 (2006-01-01), None
patent: WO 98/37302 (1998-08-01), None
patent: WO 99/25949 (1999-05-01), None
patent: WO 02/02904 (2002-01-01), None
International Search Report for PCT/GB01/02855, completed Sep. 5, 2001.

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