Bore hole air hammer

Details Bore hole air hammer Bore hole air hammer

1972-04-24

1976-03-16

Abbott, Frank L.

Tool driving or impacting

Work cleansing

By motive fluid for drive motor or advance causing or...

173 17, 173 66, E21B 500

Patent

active

039440036

ABSTRACT:
An air hammer embodying an outer housing structure connectable to a rotatable drill pipe string through which compressed air is conducted. A hammer piston reciprocates in the housing structure, compressed air being directed alternately to the upper and lower ends of the piston to effect its reciprocation in the structure, each downward stroke inflicting an impact blow upon the anvil portion of an anvil bit extending upwardly within the lower portion of the housing structure. The compressed air acts against the piston over the full internal cross-sectional area of the housing structure in delivering its impact blow, such compressed air acting downwardly over at least a portion of the piston area during its entire downward stroke, including its latter portion, during which the power or impacting air is being exhausted from the housing structure.

REFERENCES:
patent: 1601733 (1926-09-01), Gilman
patent: 2580203 (1951-12-01), Topanelian
patent: 2887989 (1959-05-01), Dulaney
patent: 2917025 (1959-12-01), Dulaney
patent: 3311177 (1967-03-01), Collier et al.
patent: 3409091 (1968-10-01), Bardwell
patent: 3453657 (1969-07-01), Bolton
patent: 3503459 (1970-03-01), Schindler
patent: 3826316 (1974-07-01), Bassinger

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