Apparatus for the removal of spoil when making trenches of great

Details Apparatus for the removal of spoil when making trenches of great Apparatus for the removal of spoil when making trenches of great

1989-07-25

1990-11-20

Novosad, Stephen J.

Boring or penetrating the earth

With below-ground tool drive prime mover

With above-ground means

37189, 175203, 175104, 175321, E21B 702, E21B 1902, E02F 324, E02F 914

Patent

active

049711571

ABSTRACT:
Apparatus including a rotary drilling cutter and a spoil removal conduit for the digging of a deep trench, characterized in that the spoil removal conduit is gradually adjustable in length during excavation and comprises: (a) a first conduit section, arranged proximate to said rotary cutter, and comprised of associated slidingly adjustable rigid male and female telescopic tube elements; (b) a second conduit section comprising a flexible tube having two ends, said flexible tube being connected to said first conduit section by one of its ends, its other end being disposed in the vicinity of the ground at a predetermined spoil discharge point, (c) a pulley supporting said flexible tube between said two ends; (d) lifting gear for suspending said pulley; and (e) a first cable associated with said lifting gear for supporting said pulley at selected adjustable heights.

REFERENCES:
patent: 2007666 (1935-07-01), Smith
patent: 2548616 (1951-04-01), Priestman et al.
patent: 2800301 (1957-07-01), Selberg et al.
patent: 3255612 (1966-06-01), Mayer et al.
patent: 3285629 (1966-11-01), Cullen et al.
patent: 3313346 (1967-04-01), Cross
patent: 3599735 (1971-08-01), Slator et al.
patent: 3753468 (1973-08-01), Casagrande
patent: 3848685 (1974-11-01), Takagi et al.
patent: 4196781 (1980-04-01), Cheek
Article, "Depth Record Set by Rig Using Flexible Drillstream" World World Oil, Nov. 1971, pp. 75-77.

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