Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet
Patent
1987-11-19
1989-07-18
Neuder, William P.
Boring or penetrating the earth
Bit or bit element
Magnetized or with magnet
175377, 175393, E21B 1060
Patent
active
048484911
ABSTRACT:
A drill bit for drilling deep holes in subsurface formations comprises a bit body having a generally hemispherical leading face and a gauge region, and two blades each extending spirally outwardly across the leading face of the bit body away from the axis of rotation, a cavity of substantial peripheral and axial extent being formed in the bit body on the forward side of each blade, and communicating with an associated exit channel in the gauge region. A plurality of cutting elements are mounted along each blade, the cutting elements being mounted closely adjacent one another side-by-side along the blade so that their cutting edges together form a single long cutting edge without substantial discontinuities. A passage in the bit body supplies drilling fluid to nozzles in the cavities for cooling and cleaning the cutting elements, fluid from the nozzles sweeping past the cutting elements and out through the exit channels.
REFERENCES:
patent: 3951220 (1976-04-01), Phillips, Jr. et al.
patent: 4022286 (1977-05-01), Gill
patent: 4733735 (1988-03-01), Barr et al.
Burridge Paul S.
Wardley Michael T.
Neuder William P.
Reed Tool Company Limited
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