1.While underbalance drilling spreads greatly, rotating blowout preventer, as a kind of high technical product, is the crucial equipment to control well pressure.
国内欠钻普遍实施,要用到旋转防喷器是关键设备,技术含量高。
2.Biolithite loss zone is a kind of special reservoirs where rock structure is frailish and lot of pore spaces and gas exist, while severe circulation loss and well blowout and well kick occur.
礁灰岩漏失地层是一类结构脆弱,并含有大量孔洞和体特殊地层,常常是严重漏与喷涌并存。
3.The purpose of the bulkhead is threefold: to seal the forward end of the motor, to retain the pyrogen igniter, and to act as a blowout plug in case of motor overpressurization (discussed earlier).