Boring or penetrating the earth – Processes – Boring with specific fluid
Patent
1978-08-04
1981-04-21
Leppink, James A.
Boring or penetrating the earth
Processes
Boring with specific fluid
175339, 175393, 175422, 239101, E21B 718
Patent
active
042627575
ABSTRACT:
A drill bit and a method for deep-hole drilling in which the drill bit has mechanical cutting means located on its lower cutting face for cutting a solid surface upon rotation of the bit and a plurality of cavitating liquid jet nozzles spaced around the face of the bit to assist in the drilling action, the nozzles being located so as to discharge a plurality of downwardly directed and concentric liquid jets that cavitate to fracture the surface to be drilled in a series of non-overlapping slots as the bit is rotated.
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Conn Andrew F.
Johnson, Jr. Virgil E.
Sundaram T. R.
Favreau Richard E.
Hydronautics, Incorporated
Leppink James A.
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