Boring or penetrating the earth – Processes – Boring with specific fluid
Patent
1977-01-21
1978-05-02
Novosad, Stephen J.
Boring or penetrating the earth
Processes
Boring with specific fluid
175320, 175393, 175410, E21C 1301, E21C 1302, E21C 1500, E21C 1502
Patent
active
040869725
ABSTRACT:
An assembly for drilling a hole in a roof to a greater depth than the height of the chamber therebelow includes a starter-driver bar having a first end adapted to be driven by a motor and a second end having a female socket therein, a rod extension including a male end shaped to be received in said female socket and a female socket at its other end of the same cross-sectional size and shape as the first named female socket, and a bit having a male shank of the same general cross-sectional shape as said male end. The male shank which is received in the socket has a pair of opposed longitudinal grooves in its outer surface extending from its lower end to a point beyond the socket. The starter-driver bar and rod extensions have axial holes therethrough so that a suction or water can be provided at the lower end of the assembly. When a suction is to be applied the sockets have at least one hole through its wall which is not covered by the drill shank, but which is covered by the male end of the rod extension. When water is to be applied this hole is omitted and the water passes through the longitudinal grooves in the bit shank. A starter hole is first drilled using the starter-driver with the drill bit in its top and a motor connected to its lower end. Drilling then is continued with an assembly consisting of a first rod extension between the bit and starter-driver. Additional rod extensions are inserted between the starter-driver and the bottom rod extension until a hole of the desired depth is obtained.
REFERENCES:
patent: 2263579 (1941-11-01), Hokanson
patent: 2693345 (1954-11-01), Martin et al.
patent: 2753155 (1956-07-01), Toms
patent: 2902832 (1959-09-01), Levy et al.
patent: 2979141 (1961-04-01), Kandle
patent: 3106972 (1963-10-01), Thornsberry
patent: 3187825 (1965-06-01), Bower, Jr.
patent: 3283837 (1966-11-01), McKain
patent: 3304816 (1967-02-01), Galorneau
patent: 3341237 (1967-09-01), Anzalone
patent: 3554306 (1971-01-01), Wilburn
Hansen Lloyd B.
Smarrella Eugene R.
Carmet Company
Dropkin Robert F.
Gioia Vincent G.
Novosad Stephen J.
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