Tubular insulating apparatus and method

Pipes and tubular conduits – Plural duct – With spacer and encircling element

Reexamination Certificate

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Details

C138S113000, C138S114000, C138S149000, C138S148000, C138S137000

Reexamination Certificate

active

06981525

ABSTRACT:
A tubular insulating apparatus (10) for insulating a first tubular (8) within a second tubular (20) for use in the oil and gas exploration and production industry. An inner insulating member (4) surrounds the outer circumference of a pipeline (8) and a rigid spacer member (16) supports the pipeline (8) within the second tubular (20), the rigid spacer member (16) being provided at the ends of the apparatus (10). A substantially resilient member (2) is also provided on the outer most face of the inner insulating member (4) and a helically arranged cut (6) is provided therethrough in order to allow tensile and compressive forces caused by a bending moment acting along the longitudinal axis (14) of the apparatus (10) when e.g. the pipeline (8) is placed upon a reel, to be substantially relieved. Methods of manufacturing and installing the apparatus (10) are also provided.

REFERENCES:
patent: 3168114 (1965-02-01), Martin
patent: 3559660 (1971-02-01), Rollins
patent: 3706208 (1972-12-01), Kadi et al.
patent: 6145547 (2000-11-01), Villatte
patent: 6305429 (2001-10-01), Welch et al.
patent: 6651700 (2003-11-01), Bastard et al.
patent: 6679294 (2004-01-01), Ringelberg et al.
patent: 2003/0075226 (2003-04-01), Codling et al.
patent: WO 03/098093 (2003-11-01), None

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