Rock bit with improved extended nozzle

Details Rock bit with improved extended nozzle Rock bit with improved extended nozzle

1987-06-15

1988-07-26

Suchfield, George A.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175424, E21B 1060

Patent

active

047594152

ABSTRACT:
An earth boring bit with an improved extended jet nozzle constructed with a tube having only one curved entrance near the head of the bit and a straight region adjacent the exit of the nozzle, with the curved region being smoothly convergent without substantial disruption or deflective surfaces from a maximum cross sectional area adjacent the head to a minimum cross sectional area in the straight region. The velocity of the fluid flowing through the tube increases gradually from a minimum adjacent the head to a maximum at the exit, with the ratio of minimum to maximum being substantially three to one.

REFERENCES:
patent: 2944794 (1960-07-01), Myers
patent: 3329222 (1967-07-01), Neilson
patent: 3363706 (1968-01-01), Feenstra
patent: 4077482 (1978-03-01), Ioannesian et al.
patent: 4239087 (1980-12-01), Castel et al.
patent: 4240513 (1980-12-01), Castel et al.
Baker, W.: Extended Nozzle Two-Cone Bits Require Precise Nozzle Sizing for Optimum Performance, 1979 Drilling Technology Conference Transactions: pp. 153-169.

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