通过对组合管柱的受力分析，依据推导的公式，找到了一种采用图板进行油管柱最大下入深度和强度校核的方法。
This paper deduced equation by analyzing strength endured by tubing string, based on formula, taking advantage of graphical method checkout the maxim setting depth and strength.
结果表明，受压扭组合作用的有重管柱的屈曲构型为上疏下密的螺旋曲线。
The results showed that the buckling configuration was helical curve for the gravitational tubular under the axial compressive force and torque.
结果表明，受压扭组合作用的有重管柱的屈曲构型为上疏下密的螺旋曲线。
The results showed that the buckling configuration was helical curve for the gravitational tubular under the axial compressive force and torque.
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