Pipes and tubular conduits – Flexible – Spirally wound material
Reexamination Certificate
2005-11-22
2005-11-22
Hook, James (Department: 3754)
Pipes and tubular conduits
Flexible
Spirally wound material
C138S138000, C138S144000
Reexamination Certificate
active
06966344
ABSTRACT:
For limiting the lateral buckling of tensile armor plies of an underwater flexible pipe, that can be used in the offshore oil industry, the plies include from the outside inward, at least one external polymer sheath, a first outward retention layer of a defined thickness K1wound around an upper outer tensile armor ply, at least one second inward retention layer of a defined stiffness K2wound around each of at least one lower inner tensile armor ply. Stiffness K2is preferably less than stiffness K1, i.e., the retention layers outward are less stiff. There is then an internal polymer sheath.
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Bectarte Fabrice
Coutarel Alain
Hook James
Ostrolenk Faber Gerb & Soffen, LLP
Technip France
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