E - Fixed Constructions – 21 – B
Patent
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.
Gzara Kais
Hache Jean-Michel
Rezmer-Cooper Iain
Schlumberger Canada Limited
Smart & Biggar
LandOfFree
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