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Institut Francais Du Pe'trole

Coflexip

Institute Francais Du Petrole

Jany Feret

Jose Mallen Herrero

Claude L Bournazel

Jos&eacute; Mallen Herrero

Guy Le Bail

The present invention relates to a reinforced flexible tube having at least one elongated reinforcing element. According to the invention, this elongated element has a cross section or profile in the form of a T and is wound helically.

Flexible tube having at least one elongated reinforcing element with a t-shape

A reinforced flexible tube having at least one helically wound elongated reinforcing element. The elongated reinforcing element has a T-shaped cross-sectional profile.

Flexible tube having at least one elongated reinforcing element with a

A flexible tubular pipe is provided having, from the inside outward, an inner sealing sleeve or tube, and an armoring including multiple armoring webs. The armoring is made up of a first armoring web on which the inner sealing sleeve or tube rests, the first armoring web including multiple interlocked wires wound with an angle A1 less than 80.degree. in relation to an axis of the flexible tubular pipe, and a set of armoring webs placed on the outside of the first armoring web, and in which at least one of the wires of the set of armoring webs is not interlocked, and is arranged so that all of the winding angles of the wires of the set of armoring webs are complementary to the angle A1, thereby obtaining a balanced flexible tubular pipe.

Flexible tubular pipe comprising an interlocked armoring web and process

Casing and flexible tubular conduit comprising such a casing and process

A flexible tubular pipe incorporating, from the inside outward, an inner sealing sleeve or tube, and an armoring comprising a plurality of armoring webs. The armoring includes a first armoring web on which the inner sealing sleeve or tube rests. The first armoring web includes a plurality of interlocked wires wound with an angle, (A1) that is less than 80.degree. in relation to the axis of the flexible tubular pipe. The armoring also includes a set of armoring webs placed on the outside of the first armoring web, each having at least one armoring web and non-interlocking wires. The winding angle of the wires is complementary to the angle (A1), so that a balanced flexible tubular pipe is created.

A reinforced flexible duct, particularly for transporting pressurized fluid having an internal pressure reinforcement and a traction resisting reinforcement. The internal pressure reinforcement is wound at a high angle with respect to an axis of the duct and the traction resistant reinforcement comprises at least a pair of crossed layers wound at an angle of at most equal to 55.degree.. A ratio of stiffness traction resisting reinforcement to a stiffness of internal pressure resisting reinforcement is between 2.5 and 8 with a winding angle of the pair of cross layers of the traction resisting reinforcement having a value of between 20.degree. and 50.degree.. A ratio K.sub.t /K.sub.p of stiffness and the winding angle .alpha. satisfy the relationship: ##EQU1##

Flexible duct having no appreciable variation in length under the effect

A reinforced flexible duct, particularly for transporting pressurized fluids having an internal pressure reinforcement and a traction resisting reinforcement. The internal pressure reinforcement is wound at a high angle with respect to the axis of the duct and the traction resisting reinforcement comprises at least one pair of crossed layers wound at an angle at most equal to 55.degree.. The modulus of elasticity of the material for the internal pressure resisting reinforcement is smaller than the modulus of elasticity of the material for the traction resisting reinforcement.

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Marly le roi, France

Jany Feret