闸板防喷器中不同的闸板块可以更换，能够使井队优化防喷器的外型，对于某一特殊的井眼部分或者作业进程。
The various ram blocks can be changed in the ram preventers, enabling the well team to optimize BOP configuration for the particular hole section or operation in progress.
在压裂作业期间装在防喷器上的装置。压裂液和支撑剂在压力下被泵入压裂头，并沿井向下流动。
The device that is attached to the blowout preventers during a frac job. Fluid and propping agent are pumped under pressure into the frac head and down the well.
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