A method for obtaining leak-off test and formation integrity...

Details A method for obtaining leak-off test and formation integrity... A method for obtaining leak-off test and formation integrity...

E - Fixed Constructions

21

B

E21B 44/00 (2006.01) E21B 47/06 (2006.01) E21B 49/00 (2006.01)

Patent

CA 2298252

The present invention presents a method that effectively restores the real- time advantage of annular pressure while drilling (APWD) measurements taken during certain drilling operations that require the mud circulation pumps to be turned off (a "pumps-off" condition). APWD data, such as pressure measurements, is obtained from instruments and related electronics within the BHA. APWD data can be measured, stored and even processed in the BHA during a pumps-off condition for subsequent processing or communication of a reduced amount of data to the driller at the surface.

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