Pipes and tubular conduits – Flexible – Spirally wound material
Reexamination Certificate
2005-01-11
2005-01-11
Hook, James (Department: 3752)
Pipes and tubular conduits
Flexible
Spirally wound material
C138S136000, C138S150000
Reexamination Certificate
active
06840286
ABSTRACT:
A flexible tubular pipe comprising at least one metal profile spiralled in a helix about a longitudinal axis of the flexible pipe. The profile consists of a metal strip, each turn of which comprises two separate box sections which are obtained by bending the said strip so that the free edges of the strip are turned down between the two box sections and are in contact with a strip portion provided on an upraised bulge formed between the two box sections. The contact portion ties approximately along the neutral fiber of the profile. Each box section has a trapezoidal shape. Connectors above or below the profile connect windings. The edges of the connectors extend into the bulges. Profiling or extra elements are provided for the connectors.
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International Search Report, Jun. 17, 2002.
Specification for Unbonded Flexible Pipe—American Petroleum Institute Exploration and Production Departmet API Specifiction17J First Edition, Dec. 1996 Effective Date: Mar. 1, 1997.
Espinasse Philippe
Jung Patrice Joël Louis
Coflexip
Hook James
Institut Francais du Pe'trole
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