Method of aerating drilling fluid

Details Method of aerating drilling fluid Method of aerating drilling fluid

1992-05-01

1993-10-05

Suchfield, George A.

Boring or penetrating the earth

With signaling, indicating, testing or measuring

Measuring or indicating drilling fluid rate of flow

175 69, E21B 2108, E21B 4700, E21B 4706

Patent

active

052496350

ABSTRACT:
A method of maintaining a constant predetermined hydrostatic pressure in a wellbore being drilled by a rotary drilling process utilizing aerated drilling fluid. The aerating gas, such as compressed air, is maintained at a constant pressure while its flow is changed in response to changes in the flow of the drilling fluid. This maintains a constant ratio of compressed air to drilling fluid, resulting in the hydrostatic pressure remaining constant.

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patent: 4394880 (1983-07-01), Faulkner
patent: 4867254 (1989-09-01), Gauignet

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