Centraliser

Details Centraliser Centraliser

1993-09-15

1994-10-18

Novosad, Stephen J.

Wells

Guide for device or conduit

Surrounding existing device or tubing

1662415, 738665, E21B 1710

Patent

active

053559509

ABSTRACT:
A centralizer (1) is used for passing assemblies and tools through bores and tubular ducts in a centralized condition, especially in downhole operations in oil work. The centralizer comprises a body (2) including carrying means (3) pivotally supporting swinging arms (4) for effecting centralization. Each arm (4) is pivotally located (14) at one end while a roller (15) or other implement is carried at or adjacent the other free end. Actuating means (6,5) including force means (7), such as a spring, load the swung-out arms (4) so that the arms (4) act against the force means (7) when pushed inwardly. The arms (4) are preferably located tangentially on the carrying means (3) and an adjuster (8) for the force means (7) can be provided.

REFERENCES:
patent: 2748874 (1956-06-01), Spencer
patent: 2812587 (1957-11-01), Roussin
patent: 3087552 (1963-04-01), Graham
patent: 3568053 (1971-03-01), Kilpatrick et al.
patent: 4523640 (1985-06-01), Wilson
patent: 4776397 (1988-10-01), Akkerman
patent: 4843896 (1989-07-01), Napeloni et al.

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