Close the annular blowout preventer as the well pressure is relatively low and force oil pipes and couplings to pass through rubber core of the annular blowout preventer.
井压较低时，关闭环型防喷器，使油管和接箍强行通过环型防喷器胶芯。
The annular BOP is the important assembly of the blowout preventer control system.
环形防喷器是井口防喷控制装置的重要组成部件之一。
The annular BOP is the important assembly of the blowout preventer control system.
环形防喷器是井口防喷控制装置的重要组成部件之一。
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