Lower stack assembly of a blow-out preventer for a hydrocarbon extraction well and method thereof

摘要: The present invention relates to a lower stack assembly (1) of blowout preventer (10) for hydrocarbon extraction well, at least one safety function (2) which can be hydraulically activated rapidly cut off pipeline section, first valve (3), fluidic connection (6) connects in permanent manner said (3) and (2), so that is adapted selectively flow fluid directed towards (2); port (4) operatively connected being cooperate with remotely operated vehicle (5) transmit pilot signal (3); accumulator (7), house pressurized fluid; second (8) between (7) by cooperating supply fluid, means (6), order activate it; wherein remains operative during the entire working life (1).