/industries/oilandgas/b/oil-gas-blog/posts/formation-kicks-and-wellbore-ballooning-in-oil-and-gas-160-wellsControlling the oil and gas drilling process is about managing the pressure and fluids from the reservoir with the hydrostatic pressure in the drilling mud. From Wikipedia’s well drilling entry: Managed Pressure Drilling (MPD) is defined by the Internationalen-USTelligent Community 13