Enhanced cross-flow with two jet drilling

Details Enhanced cross-flow with two jet drilling Enhanced cross-flow with two jet drilling

1978-08-14

1980-02-19

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

E21B 908

Patent

active

041890140

ABSTRACT:
A drill bit having three cone-shaped cutters is formed with two drilling fluid nozzles on opposite sides of one of the cutters and with an enlarged return passage for the drilling fluid being formed between the other two cutters. Flow restrictors adjacent the two nozzles restrict the flow of return fluid in those areas. A flow diverter in the dome area of the bit extends into the space between the cutters to better direct fluid across the bottom of the hole where cuttings are being generated by the cutter teeth.

REFERENCES:
patent: 1922436 (1933-08-01), Herrington
patent: 1999131 (1935-04-01), Reed
patent: 2207766 (1940-07-01), Thompson
patent: 2776115 (1957-01-01), Williams, Jr.
patent: 3363706 (1968-01-01), Feenstra
patent: 3509952 (1970-05-01), Galle
patent: 3618682 (1971-11-01), Bennett
patent: 4022285 (1977-05-01), Frank
patent: 4126194 (1978-11-01), Evans

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