Boring or penetrating the earth – Processes – Boring with specific fluid
Patent
1996-06-18
2000-09-05
Dang, Hoang
Boring or penetrating the earth
Processes
Boring with specific fluid
173110, 173111, 175106, 175296, E21B 414
Patent
active
RE0368482
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.
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Sonoma Corporation Hipp-Tripper.TM. Vibratory Impact Drill Brochure.
Bui Huy D.
Oliver Michael S.
Dang Hoang
Smith International Inc.
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