... downhole remedial operation 井下大修作业 downhole safety valve 井下安全阀 downhole sensor package 井下传感器组件 ...
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Petroleum and natural gas industries - Downhole equipment - Subsurface safety valve equipment.
石油和天然气工业。下降孔设备。地下安全阀设备。
A cementing method of separable setting and variable density is used, with two level controls of safety valve on the ground and downhole;
采用双凝固井、变密度固井方式,均采用地面和地下两级安全阀控制;
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