... to ensure that well control is maintained and that the well is full of fluid at all times. PMCD is a technique of Managed Pressure Drilling (MPD) that can mitigate severe losses and reduce associated non-productive time when drilling formations containing large fractures, voids or caverns. Drilling...

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... secondary well control after mistaking flowback for a kick. Such tests provide definitive results when done correctly. However, when performed incorrectly, the wellbore response can appear either ambiguous or indicative of a kick. When done correctly, the ballooning test shows dissipation in both pressure...

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.... A few anomalous formations with uncertain pressure regimes resulted in severe to total losses on one well, while an adjacent well drilled at similar depths resulted in high-pressure influxes with ensuing well-control consequences. A detailed evaluation of historical data, comprehensive hydraulic...

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... on RGH Process section), which is considered an independent process from dynamic influx management. Thus, for the intent of this work, RGH is not considered part of the MPD well control practices, but as a method to enhance these, if/where the opportunity allows. Current industry experience...

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... the total volumes required, the minimum and maximum flow rates during displacement, the required SBP if pump fails and ultimately the estimated total displacement time required to complete the operation. MPC SBP Schedule Modeling managed pressure drilling drilling fluids and materials well control...

...-based kick tolerance strategy is designed to manage. Well Control Risks and Barriers There are several situations that can lead to a well control situation. These include the following: A drop in wellbore pressure to below the pore pressure during a transient event such as a connection...

... of circulation. MPD helps operators drill through narrow pore pressure-fracture pressure windows, minimizing 1-well control complications like high-pressure influxes or severe downhole mud losses and 2-pipe stuck due to differential sticking. Both of these are the best MPD applications where a corrective...

... the pumps are shut off and the observed surface parameters indicate volumetric gains, the situation is falsely interpreted as having drilled into a fracture with higher pore pressure, causing a kick into the wellbore. The incorrect interpretation leads to well control procedures being implemented...

... ( Griffin, 1967 ). This method provides simple implementation, but it cannot distinguish between different event types. Abstract In managed pressure drilling (MPD), robust and fast event detection is critical for timely event identification and diagnosis, as well as executing well control actions...

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...Integration of MPD and Automated Well Control Systems It is possible to see in the "Automated Well Control Description" and the "MPD Description" sections that MPD and Automated Well Control are two independent processes originally designed to operate independently. In addition...

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... of pressure very quickly. Some of the books on well control may have led to the belief that when there is gas at the bottom, the same bottomhole pressure can reach the surface at the end of gas migration. Rig operators are concerned about the gas handling capacity of equipment installed on the rig and think...