本文应用虚位移原理，在充分考虑钻柱所处的特殊环境的基础上，考察了斜直井眼中钻柱屈曲的可能性。

On the basis of energy method, the possibility of drill stem buckling in inclined straight hole is studied.

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对于大多数直井，倾角其实也只是对井眼轨迹的测量。

For most vertical wellbores, inclination is the only measurement of the path of the wellbore.

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塔河油田三叠系、石炭系井眼失稳问题一直是该油田勘探与开发的技术难点。

The problem of borehole instability in the Triassic system and the Carboniferous system has been kept as a major difficulty in the exploration and development of this oilfield.

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