A METHOD FOR DETERMINING EQUIVALENT STATIC MUD DENSITY DURING A CONNECTION USING DOWNHOLE PRESSURE MEASUREMENTS

摘要

The present invention presents a method that effectively provides the nearreal-time advantage of annular pressure while drilling (APWD) measurementstakenduring pipe connections that require the mud circulation pumps to be turnedoff (a"pumps-off" condition). APWD data, such as pressure measurements, are obtainedfrom instruments and related electronics within the bottom-hole assembly(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 amountofdata to the driller at the surface.