【多选题】
液压闸板防喷器的闸板特点有___。
A. 浮动
B. 自动清砂
C. 自动对中
D. 井压助封
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答案
ABCD
解析
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相关试题
【多选题】
闸板防喷器的功能包括但不限于___。
A. 装剪切闸板时可以剪断钻具并密封井口
B. 全封闸板不能全封井口
C. 其旁通口可连接管汇进行循环、压井等作业
D. 其旁通口不可连接管汇进行循环、压井等作业
【多选题】
对于闸板防喷器的手动锁紧装置说法正确的是___。
A. 防喷演习要用手动锁紧装置
B. 手动锁紧装置是为了在长时间关井的情况下进行
C. 手动锁紧装置可以用来手动关井
D. 顺时针转手轮闸板被锁紧
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