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[单选题]
Q/SY1552-2012《钻井井控技术规范》中规定:在工程设计中要设计合理的井身结构和套管结构,表层套管下深应满足井控安全及封固浅水层、疏松地层、砾石层的要求,且其坐入稳固岩层不少于()m,固井水泥应返至地面
A.10
B.20
C.30
D.50
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A、10
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.10
B.20
C.30
D.50
A、10
A.30mg/m3(20ppm)
B.45mg/m3(30ppm)
C.75mg/m3(50ppm)
D.150mg/m3(100ppm)
A.2h;4h
B.2h;6h
C.0.5h;2h
D.1h;2h
A.地层孔隙压力梯度
B.地层破裂压力梯度
C.地层坍塌压力梯度
D.地层漏失压力梯度