Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1976-06-14
1978-02-28
Purser, Ernest R.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175 53, 175381, 175339, 299 31, 299 60, E21C 2300
Patent
active
040760871
ABSTRACT:
A hole reamer according to the invention includes a main body or support with roller cutters rigidly connected to a drill stem, and an additional support with roller cutters arranged co-axially with the main body or support. A additional support device can move along the axis of the main body and is provided with a means to effect this longitudinal movement. The main body and additional support device are adapted to drill holes of one diameter with consequent reaming thereof.
REFERENCES:
patent: RE24965 (1961-04-01), Kirkpatrick
patent: 1333491 (1920-03-01), Hughes
patent: 1399831 (1921-12-01), Wadsworth
patent: 3376942 (1968-04-01), Van Winkle
patent: 3437380 (1969-04-01), Lawrence
Chuply Vladimir Yakovlevich
Kobozev Vladimir Nikolaevich
Kondratenko Feofan Ilich
Milach Adam Arsentievich
Poludnenko Jury Zakharovich
Favreau Richard E.
Purser Ernest R.
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