Method and tool for performing seabed excavation

Details Method and tool for performing seabed excavation Method and tool for performing seabed excavation

1991-08-19

1992-10-20

Reese, Randolph A.

Excavating

Peat excavators

37 65, 405163, E02F 388

Patent

active

051559285

ABSTRACT:
For excavation of a clay seabed, particularly in a coffer dam to expose a buried pipeline, a minimum of three water nozzles producing water jets and the associated effects 16, 17 and 18 are used. The nozzles are mounted on a disc 12 which can move horizontally and vertically and which rotates in a horizontal plane. The effect 18 (if operated alone) would produce a trench 22 having sloping sides. The two effects 16, 17 enable a trench having vertical sides to be cut and enable the disc 12 to be moved downwardly until obstructed by the base of the trench. The three nozzles are equiangularly spaced about the axis. The rotation of the disc 12 makes the effect of the nozzles possible.

REFERENCES:
patent: 545762 (1895-09-01), Bates
patent: 2956354 (1960-10-01), Varner
patent: 4127950 (1978-12-01), Tillinghast et al.
patent: 4327507 (1982-05-01), Volbeda
patent: 4479741 (1984-10-01), Berti et al.

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