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wellhead
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*['welhed]\nn. 水源, 泉源
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详细解释：
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以下为句子列表：
英文: By establishing force equilibrium equations, a mechanical model for calculating the friction on the string is set up, and the analytical formulas for calculating the hook load and wellhead torque when the string is tripped in.
中文: 通过建立管柱受力平衡方程，推导出水平井管柱入井时摩阻计算的力学模型，分析计算了在稳定和旋转方式下管柱入井时的大钩载荷和井口扭矩等重要技术参数的解析公式。
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英文: Its drilling system uses a 380-ton protective casing over the wellhead that is about the size of a six-story office building.
中文: 它的钻探系统采用了重380吨、约六层办公大楼大小的保护罩（防爆装置）来保护井口。
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英文: Model QW50A Air Operated Slips is a wellhead tools. Mainly used to clipping tubing and drilling rod which raise or put down at well repairing service operation.
中文: QW50A气动卡瓦是油田修井作业时，安装在井口上用于卡紧油管及类似管柱的一种工具。
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英文: That swellhead never pays attention to what other people say.
中文: 那个自大狂从来不听别人的话.
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