Method and apparatus for driving pipe

Details Method and apparatus for driving pipe Method and apparatus for driving pipe

1978-03-20

1980-11-11

Pate, III., William F.

Boring or penetrating the earth

With above-ground means to impact an earth-penetrating means

173 28, 173133, 173137, 175171, 175173, 175207, E21B 102

Patent

active

042327520

ABSTRACT:
A casing hammer for driving casing while drilling a water well comprises a housing having an annular pneumatic chamber with a relatively lightweight, short-stroke annular piston. The piston is reciprocably driven at a high rate to provide a large number of light blows of controllable energy upon an annular anvil that seals one end of the chamber. Percussive blows upon the anvil are transmitted through a drive head and adapter to the upper end of the pipe to be driven. The hammer is suspended from a rotary drive head that operates a hollow drill string extending downwardly through the hammer and through the casing driven thereby.

REFERENCES:
patent: 1292429 (1919-01-01), Bull
patent: 1658330 (1928-02-01), Gilman
patent: 3154158 (1964-10-01), Lincoln
patent: 3511325 (1970-05-01), Schmidt
patent: 3583499 (1971-06-01), Cordes
patent: 3625295 (1971-12-01), Gunnin
patent: 3645343 (1972-02-01), Mays
patent: 3788423 (1974-01-01), Nittinger et al.
patent: 3833072 (1974-09-01), Back
patent: 3895680 (1975-07-01), Cook
patent: 3961672 (1976-06-01), Welsch

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