Pneumatic impact drilling tool

Details Pneumatic impact drilling tool Pneumatic impact drilling tool

1976-12-06

1978-07-18

Staab, Lawrence J.

Tool driving or impacting

Impacting devices

Impact transmitting anvil

60411, 173136, B25D 900

Patent

active

041009762

ABSTRACT:
A pneumatically operated impact drilling tool for earth drilling, includes a reciprocating hammer, an anvil positioned under the hammer and a feeder tube extending through the hammer and at least partially through the anvil. The drilling tool is connected to a string of drilling pipe and high pressure compressed air or other pneumatic fluid is introduced to operate the tool. The feeder directs the flow of fluid through ports in the hammer to alternate pressure on opposite sides of the hammer to move the same upward and downward relative to the anvil. A venturi arrangement in the feeder tube functions to produce a vacuum which is applied to the opposite end of the hammer from the end at which pressure is being applied for moving the same.

REFERENCES:
patent: 1253290 (1918-01-01), Smith
patent: 2887989 (1959-05-01), Dulaney
patent: 3105559 (1963-10-01), Collier et al.
patent: 3527239 (1970-09-01), Boom
patent: 3583501 (1971-06-01), Aalund
patent: 3599730 (1971-08-01), Luthman et al.
patent: 3612191 (1971-10-01), Martini
patent: 3924690 (1975-12-01), Shaw
patent: 3964551 (1976-06-01), Bassinger
patent: 4015670 (1977-04-01), Rear
patent: 4054180 (1977-10-01), Bassinger

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