Boring or penetrating the earth – With signaling – indicating – testing or measuring – Measuring or indicating drilling fluid rate of flow
Patent
1991-05-10
1991-12-10
Dang, Hoang C.
Boring or penetrating the earth
With signaling, indicating, testing or measuring
Measuring or indicating drilling fluid rate of flow
73155, 175 50, E21B 4710, E21B 2108
Patent
active
050709496
ABSTRACT:
The invention relates to a method of analyzing fluid influxes into an oil well from an underground formation. During a drilling mud transient flow state, the successive values of the rate Q.sub.i or pressure p.sub.r of injection of the drilling mud into the well and the successive values of the rate Q.sub.r or pressure p.sub.r of return of the drilling mud to the surface are measured. The changing values of the rate or pressure of injection are compared with the changing values of the return rate or pressure. From this comparison the nature and volume of the fluids that have penetrated into the well are determined.
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Dang Hoang C.
DuPont Henri
Hyden Martin
Ryberg John J.
Schlumberger Technology Corporation
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