I see.......I agree 100 percent. Would it engulf the planet?? Maybe if the planet consisted purely of a dense gas, but not a rocky solid. In fact, I'm almost sure that it would engulf Jupiter if it were ALL gas, because the gas would be like an atmosphere, with no where to go but towards the planet's center of gravity (what's stopping it?).

Say there wasn't a black hole. Then the gas would simply contract to a critical density and stop (when the outward gas pressure equals gravity - almost like star without fusion). By introducing a black hole you allow an outlet to lower the pressure and the top gas replaces the bottom that's bee sucked up. Result........ Jupiter "drains" like water in a bath.