Method and apparatus for predicting and controlling...

Details Method and apparatus for predicting and controlling... Method and apparatus for predicting and controlling...

E - Fixed Constructions

21

B

E21B 21/08 (2006.01) E21B 44/00 (2006.01)

Patent

CA 2512437

A method and apparatus for predicting and controlling secondary kicks, while dealing with a primary kick experienced when drilling an oil and gas well. The method includes a step of determining whether a different pressure per cubic meter of mud pit volume has been caused by a secondary kick by subtracting shut in drill pipe pressure (SIDPP) from shut in casing pressure (SICP) and dividing the derived sum by a kick volume in KPa per cubic meter from the primary kick. A further step is then taken of increasing casing pressure until casing pressure equals pit gain times (X) rate of change in casing pressure per cubic meter of pit gain plus (+) SIDPP.

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