Improvements in or relating to underwater excavation apparatus

Details Improvements in or relating to underwater excavation apparatus Improvements in or relating to underwater excavation apparatus

E - Fixed Constructions

02

F

E02F 5/28 (2006.01)

Patent

CA 2275578

There is disclosed an improved underwater excavation apparatus (300a, b, c). Known apparatus suffer from a number of problems, e.g., efficiency and control of movement. Accordingly the invention provides an underwater excavation apparatus (300a b, c) comprising a hollow body (370a, b, c) having at least one inlet (371a, b c) and at least one outlet (373a, b c), at least one pair of impellers (335a, b, c), (340a, b, c) coaxially displaced one from the other and rotatably mounted in the hollow body (370a, b, c), and means for driving the impellers in contrary rotating directions. The underwater excavation apparatus (300a b, c) comprises a pair of horinzontally opposed inlets (371a, b, c) communicating with a single outlet (373a, b, c) the outlet (373a, b, c) being disposed vertically downwards substantially midway between the two inlets, in use. The excavation apparatus (300a, b, c) may therefore, be substantially "T" or "Y" shaped. The means for driving the impellers (335a, b, c), (340a, b, c) may include at least one drilling motor (310a, b, c).

La présente invention concerne un appareil (300a, b, c) d'excavation sous-marine amélioré. Ce type d'appareil, connu, souffre d'un certain nombre de problèmes relatifs, par exemple, à l'efficacité et à la commande du mouvement. Selon un mode de réalisation, l'appareil (300a, b, c) d'excavation sous-marine comprend un corps (370a, b, c) creux possédant au moins un orifice (371a, b, c) d'entrée, un orifice (373a, b, c) de sortie, une partie d'hélices coaxiallement décalées l'une par rapport à l'autre et montées rotatives dans ledit corps (370a, b, c) creux et un élément permettant d'entraîner les hélices dans des sens de rotation contraires. L'appareil (300a, b, c) d'excavation sous-marine comporte une paire d'orifices (371a, b, c) d'entrée opposés, de manière horizontale, communiquant avec un orifice (373a, b, c) de sortie unique, ledit orifice (373a, b, c) de sortie étant disposé verticalement vers le bas et sensiblement à mi-chemin entre les deux orifices d'entrée utilisés. L'appareil (300a, b, c) d'excavation peut, donc, être sensiblement en T ou en Y. L'élément d'entraînement des hélices (335a, b, c) peut comporter au moins un moteur de forage (310a, b, c).

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