... 错油门套筒,导阀阀套 pilot valve bushing 下部装回压阀的套管柱 floating in casing 阀盖衬套 bonnet bush ...
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Floating displacement cementing technology and flush joint casing technology are the first application in sidetracking well of Dagang Oilfield.
漂浮顶替固井工艺、无接箍套管工艺技术是首次应用在大港油田侧钻井上。
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