Conventional methods of managing gas-in-riser events are not optimal when the drilling
riser is isolated from the formation by a closed subsea blowout preventer (BOP) on rigs …

Significant discrepancy exists between the gas migration rates observed during the field
applications of Pressurized Mud Cap Drilling (PMCD) and the widely used Taylor bubble …

Abstract The Influx Management Envelope (IME) is a proven tool to assess management of
influxes taken during MPD operations. Currently, IME establishes limits of manageable influx …

The main objective of this paper is to present and discuss the results and significant
observations gathered during 13 experimental runs conducted in a full-scale test well at …

The potential for a gas-in-riser situation to become uncontrollable by the rapid displacement
of mud out of the riser is extremely high if the riser-top is left open. The unloading can be …

Abstract Pressurized Mud Cap Drilling (PMCD) is commonly used in carbonate formations
with massive lost returns. However, gas migration during PMCD is not well-understood and …

Accurate estimation and prediction of gas rise velocity, length of the gas influx region, and
void fraction are important for optimal gas kick removal, riser gas management, and well …

Understanding gas migration rates is a critical part of well control discipline; for PMCD
significant discrepancies exist between field observations of gas migration rates and …

It is challenging to optimize operation procedures that safely remove riser gas without
causing equipment, personnel, or unnecessary environmental issues. This paper presents …

This work complements previous efforts exploring the opportunity for safer return to
operations after an influx event in deepwater drilling operations when an MPD system is …