Method and apparatus for coring in subaqueous structures

Details Method and apparatus for coring in subaqueous structures Method and apparatus for coring in subaqueous structures

1985-06-17

1986-12-02

Novosad, Stephen J.

Boring or penetrating the earth

Boring without earth removal

Combined with earth removal

175 58, 175244, 175246, 7386385, 7386386, E21B 1002

Patent

active

046258132

ABSTRACT:
Coring of a subaqueous structure having a significant water pressure head on one side is carried out through a full port valve assembly mounted on the inner or dry side of the structure. With the valve open, the barrel of a coring device is inserted, and a core is cut and removed. The valve is closed to prevent inflow of soil and water. The hole from which the core has been removed can be sealed by injecting a grouting compound through the mounted ball valve assembly, or can be injected by means of a mechanical packer. The valve assembly permits coring to be interrupted, for example, to permit rail service operations through a subaqueous railroad tunnel.

REFERENCES:
patent: 1222249 (1917-04-01), Tuttle
patent: 2261457 (1941-11-01), Wiggins
patent: 2353530 (1944-07-01), Walker
patent: 2815663 (1956-12-01), Lupfer
patent: 3007340 (1961-11-01), Kraftson
patent: 3115782 (1963-12-01), Echtler, Jr.
patent: 3162049 (1964-12-01), Blanchard
patent: 4096754 (1978-06-01), Beveridge, Jr.
patent: 4294124 (1981-10-01), Kalwaitis
patent: 4350052 (1982-09-01), Kendall

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