Drill bit for forming a fluid cushion between the side of the dr

Details Drill bit for forming a fluid cushion between the side of the dr Drill bit for forming a fluid cushion between the side of the dr

1981-05-28

1984-07-31

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175340, 175393, 175322, E21B 1018, E21B 1060

Patent

active

044632207

ABSTRACT:
In a drill bit comprising a body having a channel therethrough for carrying drilling fluid for injection into a bore hole through a nozzle at one end thereof and a cutting head mounted in the body and contacting the bottom of the bore hole. The improvement comprises at least one passage extending from the channel to a side portion of the exterior surface of the body wherein drilling fluid in the channel will flow through the at least one passage to the exterior of the body and form a fluid layer between the side portion of the body and the opposing side of the bore hole.

REFERENCES:
patent: 2710741 (1955-06-01), Hall
patent: 2805045 (1957-09-01), Goodwin
patent: 3645396 (1972-02-01), Miller et al.
patent: 4154312 (1979-05-01), Barnetche

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