The temperature of reservoir decreases approximately in exponential with the distance center of well bore.

油藏温度是井筒径向距离的函数,温度沿径向距离近似地按指数规律衰减.

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By comparing with normal well bore, the economic efficiency of slim hole drilling was evaluated.

通过与常规井眼对比, 评价了小眼井钻井技术经济效益.

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The characteristic of the swabbing induces the complexity of the well - bore pressure change during procedure.

开采非自喷井采用抽汲生产将导致井底压力变化十分复杂.

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Calculating results show that fluctuation pressure decrease with eccentricity between drill stem and well bore increase.

计算结果表明:随钻柱与井眼间偏心度增大,波动压力减小.全偏心情况下的波动压力大约只有同心情况下的一半.

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It is necessary to scientifically plan and survey well bore trajectories in directional drilling.

井眼轨道的设计与监测技术一直是定向钻井中的研究热点.

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A mechanical model for well bore stability is established based upon mechanical analysis.

从力学分析入手,建立了井壁稳定问题的力学模型.

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