Rod strings are designed by computing compound stress with the fourth strength energy on the condition of torque and axial force.
应用第四强度理论,求解杆柱在扭矩和轴向力条件下的复合应力,设计抽油杆柱。
参考来源 - 地面驱动单螺杆泵举升系统工艺设计The oil pumping bolt is composed by couplings connected of decades or hundreds of sucker rods. During the oil recovery process, the oil pumping bolt bear the no symmetric load action .
抽油杆柱是由数十根或数百根抽油杆通过接箍连接而成。
参考来源 - 抽油杆可靠性及其剩余寿命研究·2,447,543篇论文数据，部分数据来源于NoteExpress
抽油杆的疲劳破坏是抽油杆柱的主要失效形式之一。
在有杆抽油系统工作过程中，抽油杆柱的合理设计是非常重要的。
Reasonable rod pump string design is very important in the working course of rod pump system.
应用有限元法对辽河滩海油田大斜度定向井抽油杆柱受力进行了三维计算。
Using finite element analysis method, three-dimensional calculation is conducted for force summing on rod in high-inclination well of Liaohe tidal zone oilfield.
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