Air percussion drilling assembly

Details Air percussion drilling assembly Air percussion drilling assembly

1992-07-17

1994-06-21

Dang, Hoang C.

Boring or penetrating the earth

Processes

Boring with specific fluid

166106, 166296, 173110, 173111, E21B 414

Patent

active

053221362

ABSTRACT:
An air percussion hammer drill is disclosed for operation in an earthen formation. The air compression hammer mechanism comprises a piston that reciprocates while simultaneously rotating within its housing. A hammer drill bit slidably keyed to the bottom of the piston transfers the impact energy to the formation and rotates during operation independent of an attached drill string.

REFERENCES:
patent: 1773366 (1930-08-01), Lear
patent: 2755069 (1956-07-01), Mosby
patent: 3166131 (1965-01-01), Worman
patent: 3323601 (1967-06-01), Uebel
patent: 3404739 (1968-10-01), Worman
patent: 3978931 (1976-09-01), Sudnishnikov et al.
patent: 4209070 (1980-06-01), Sudnishnikov et al.
patent: 4932483 (1990-06-01), Rear
patent: 5156223 (1992-10-01), Hipp

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