Deflector devices

B - Operations – Transporting – 63 – B

Patent

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Details

B63B 21/66 (2006.01)

Patent

CA 2433286

A deflector device (22) for use with a tow line between a seismic survey vessel and a tow, in particular a seismic streamer or streamer array, in the water behind the vessel comprises a vertically oriented wing-shaped body (28) shaped to produce in use a sideways force which urges the tow line laterally with respect to the direction of movement of the towing vessel. The wing- shaped body (28) includes one or more buoyancy elements, and a rearwardly extending boom (32). A pivotable control surface (54) extends sideways from the boom (32), and is shaped to produce in use a force having a substantial vertical component. The angle of the control surface is remotely controllable, in order to control the depth of the deflector device.

L'invention concerne un dispositif de déviation (22) à utiliser avec un câble de remorquage entre un navire sismique et une remorque, en particulier une flûte sismique ou un réseau de flûtes, laquelle remorque est tractée sous l'eau derrière le navire. Ce dispositif comprend un corps aliforme (28) orienté verticalement, conçu pour produire, en service, une force latérale qui pousse le câble de remorquage latéralement par rapport au sens de déplacement du navire remorqueur. Ce corps aliforme (28) comporte un ou plusieurs éléments de poussée hydrostatique et un bras (32) s'étendant vers l'arrière. Une surface de commande pivotable (54), qui s'étend latéralement du bras (32), est conçue pour produire, en service, une force présentant une composante sensiblement verticale. L'angle de la surface de commande peut être commandé à distance, ce qui permet de contrôler la profondeur du dispositif de déviation.

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