Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent
1996-04-24
1999-03-30
Tsay, Frank
Boring or penetrating the earth
Processes
Boring curved or redirected bores
175296, 175298, 173 17, E21B 704, E21B 414
Patent
active
RE0361666
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. The air percussion hammer assembly is therefore ideally suited to directional drilling activities.
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Sonoma Corporation Hipp-Tripper.TM. Vibratory Impact Drill Brochure.
Bui Huy D.
Johns Roger P.
Oliver Michael S.
Smith International Inc.
Tsay Frank
LandOfFree
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