Casing hammer assembly for cable tool drilling apparatus

Details Casing hammer assembly for cable tool drilling apparatus Casing hammer assembly for cable tool drilling apparatus

1997-12-04

2000-02-29

Neuder, William

Boring or penetrating the earth

With tool drive prime mover or above-ground mechanical...

With installing casing

175135, 173202, E21B 100

Patent

active

060297573

ABSTRACT:
A casing hammer assembly for a cable tool drilling apparatus and a cable tool drilling apparatus employing the casing hammer assembly. The casing hammer assembly includes a hammer housing which is positioned on a casing pipe and having a central aperture for through passage of a cable tool drilling string. An impact anvil is located in the housing, surrounding the central aperture, and a reciprocal hammer is mounted for striking the anvil. An eccentric arrangement is employed for raising the hammer for repeated striking of the anvil in order to sink the casing pipe. A hydraulic arm is utilized for laterally positioning the hammer housing in relation to the casing pipe.

REFERENCES:
patent: 3685596 (1972-08-01), Collins
patent: 4232752 (1980-11-01), Hauk et al.
patent: 4652195 (1987-03-01), McArthur
patent: 4669552 (1987-06-01), Foster et al.
patent: 4732220 (1988-03-01), Johnsson
patent: 5310014 (1994-05-01), Mueller
patent: 5375667 (1994-12-01), Trevisani
patent: 5549170 (1996-08-01), Barrow

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