Method for operating rotary drilling under conditions of high cu

Details Method for operating rotary drilling under conditions of high cu Method for operating rotary drilling under conditions of high cu

1983-05-02

1984-09-25

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Boring with specific fluid

252 85C, E21B 4300

Patent

active

044731248

ABSTRACT:
In a rotary method of drilling a well into the earth employing a drilling mud system, the transport ratio (hole cleaning efficiency) is increased by increasing the yield point to plastic viscosity ratio of the drilling fluid while maintaining the plastic viscosity constant. In a preferred embodiment, the plastic viscosity is varied within the range of 7.5 to 30 centipoises and the yield point to plastic viscosity ratio is varied within the range of 0.20 to 1.5.

REFERENCES:
patent: 3637492 (1972-01-01), Kolaian
patent: 3860070 (1975-01-01), Herce et al.
patent: 3878110 (1975-04-01), Miller et al.
patent: 3985659 (1976-10-01), Felicetta et al.
patent: 4322301 (1982-03-01), Blackmore
patent: 4330414 (1982-05-01), Hoover
The Oil and Gas Journal, Jun. 26, 1967, vol. 65, No. 26, pp. 62-70, Deily et al.

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