Tool equipped with a percussive device

Details Tool equipped with a percussive device Tool equipped with a percussive device

1978-07-31

1981-06-30

Reynolds, Wm. Carter

Tool driving or impacting

Impacting devices

Hammer head constitutes piston of drive motor

173 73, E21B 414

Patent

active

042757940

ABSTRACT:
The invention relates to a tool which incorporates a device insuring the efficient control of a percussive hammer, regardless of the drilling depth. For this purpose, drive sludge arriving in an annular space reaches an inlet of a fluid switching element of single or double stability in which the flow of fluid alternates between two fluid circuits, causing the hammer to strike and return.

REFERENCES:
patent: 1353796 (1920-09-01), Stage
patent: 2422031 (1947-06-01), Merten
patent: 2800884 (1957-07-01), Mori
patent: 3602317 (1971-08-01), Scroggins
patent: 4069876 (1978-01-01), Pototsky et al.
patent: 4133398 (1979-01-01), Richards

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