Title: Flexible heat-insulated pipe-line for in particular cryogenic fluids

Abstract: A fluid-conveying, flexible, lagged pipe for building up in particular a liquefied natural gas carrying pipe-line connecting an off-shore platform for working submarine oil fields or like underwater pools to a tanker ship and comprising an inner tubular duct including an inner helical metal spring, an intermediate layer of yielding composite material and an outer helical metal spring like the inner spring but longitudinally offset by half a pitch of turns with respect to the latter so that the turns of said outer spring be nested between those, respectively, of said inner spring.

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Inventors: Argy, Gilles (La Queue Les Yvelines, FR)

Application Number: 06/230892
Filing Date: 1981-02-02
Publication_date: 1983-11-29
Assignee: Technigaz (FR)

Primary Class(es): 138/149 138/104, 138/122, 138/148, 138/139, 138/131
Other Classes: F16L59/153; F16L59/00; F16L11/00
US Patent Ref:

1179578	April, 1916	Sundh	138/122
1259952	March, 1918	Beckmann	138/122
2858854	November, 1958	Daggett	138/137	Flexible tubing
3388724	June, 1968	Mowell et al.	138/149	Submarine insulated lng pipeline
3453716	July, 1969	Cook	138/149	METHOD OF MANUFACTURING PIPE SECTIONS FOR THE TRANSPORTATION OF CRYOGENIC LIQUIDS
3527258	September, 1970	Farr	138/131	FLEXIBLE TUBING
4287245	September, 1981	Kikuchi	138/149	Heat insulator for pipe lines

Other Refs: DE1097220DE255847DE2705361FR832518FR856496FR1602270FR2037631FR2167136FR2235324GB591307GB1312509GB1383313

January, 1961
July, 1977
August, 1978
September, 1938
June, 1940
December, 1970
December, 1970
July, 1973
January, 1975
August, 1947	138/122
April, 1973
February, 1975	138/122

Primary Examiner: Shepperd, John W.
Assistant Examiner:
Attorney: Steinberg & Raskin

Claims:

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