Determining the extent of entry of fluids into a borehole during

Details Determining the extent of entry of fluids into a borehole during Determining the extent of entry of fluids into a borehole during

1974-09-19

1976-07-13

Purser, Ernest R.

Boring or penetrating the earth

With signaling, indicating, testing or measuring

Measuring or indicating drilling fluid rate of flow

166 67, 166224R, 73155, E21B 4700

Patent

active

039688445

ABSTRACT:
A method for determining when formation fluids enter the borehole during drilling of a well wherein a bypass is provided in the drill string above the back pressure valve and the pressure at the surface downstream of the mud pump is determined.

REFERENCES:
patent: 1854208 (1932-04-01), Lynch et al.
patent: 1918096 (1933-07-01), Greve
patent: 2290408 (1942-07-01), Crites
patent: 2340993 (1944-02-01), Smith
patent: 3498393 (1970-03-01), West et al.
patent: 3517553 (1970-06-01), Williams et al.
patent: 3627065 (1971-12-01), Murphy

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