The calculating formula for critical axial load of worn rod string and tubing was set up.
建立了铅垂油井杆管偏磨临界轴向压力的计算公式。
The paper gives a detailed analysis of the design method causing rod string dropout and points out its inadequacies.
文章对抽油杆柱断脱的设计方法进行了详细的理论分析，指出了其中存在的问题。
Based on theory of vibration mechanics, this paper analyzes the vibration mechanics model of rod string systematically.
从振动力学的理论出发，对现行抽油杆柱的振动力学模型进行了系统分析。
Analysis screw pump system, get the mechanical model of rod string, deduct and calculate undertaking load of rod string.
通过对螺杆泵采油系统进行分析，得到抽油杆柱力学模型，并对杆柱所承受载荷进行推导计算。
At last I calculate the life indexes and fuzzy reliability indexes of side-abrasion failure of rod string failure, and analyze them generally.
再利用模糊可靠性理论计算管杆偏磨失效寿命指标和模糊可靠性指标，最后对其进行综合分析。
According to the operating mode of the rod string in slant straight Wells, the authors establish a one-dimensional damped wave equation for the rod string.
根据斜直井抽油杆柱工况特点，建立了斜直井抽油杆柱的一维有阻尼波动方程。
Under a given condition, strength expressions of rod string is discussed and a linear diagram is derived which can be used to check the strength of rod string.
在某一给定条件下，对满足抽油杆柱强度要求的关系式进行了讨论，并绘制出了可校核抽油杆柱强度的线性关系图版。
On the basis of the analysis of the twisting vibration of rotary sucher-rod string, a formula of calculating every harmonic vibration eigenfrequency is presented.
在对旋转抽油杆柱的扭转振动分析的基础上，给出了各阶扭转振动固有特性参数的计算式。
Taking the rod string as the object of study, a method of computing pumping stroke and speed of walking beam pumping units for slant straight wells is also presented.
以抽油杆柱为研究对象，论述了斜直井游梁式抽油机冲程和冲次的计算方法。
On the basis of the theoretical and experimental research, the preventive measures are discussed such as installing tubing anchor, rotary device of rod string and centralizer.
在理论分析和试验研究的基础上，针对井下的杆管偏磨问题，对安装油管锚定装置、旋转抽油杆装置和抽油杆扶正器这三种预防措施进行了探讨。
In the light of characteristics that horizontal hole possesses a certain rate of curvature, the method of estimating minimum axial force at any point along a rod string is established.
针对水平井井眼具有一定曲率的特点，建立了抽油杆柱下部任意一点最小轴向力的计算方法。
In the light of the frequent breaking of the rod string in a surface driven screw pump well, the force condition of the string in the well is analyzed by means of the elastoplasticity theory.
针对井口驱动螺杆泵抽油杆柱断脱频繁的问题，应用弹塑性理论分析了抽油杆柱在井中的受力状况。
The side-abrasion failure of rod string for polymer drive pump wells is analyzed by using computer simulation method. The extension of fuzzy reliability analysis is expanded to mechanical system.
将计算机数字仿真技术引入聚驱井管杆偏磨失效模糊可靠性分析中，把模糊可靠性的分析范围扩展至机械系统。
The dynamic strength of rod string and the mount position of centralizer were calculated, according to the acquired deformation of rod string and its impact contact force with tube in the time domain.
根据求得的时域内抽油杆柱受力变形值以及与油管柱碰撞接触力，计算了抽油杆柱动强度和扶正器安放位置。
The dynamic strength of rod string and the mount position of centralizer were calculated, according to the acquired deformation of rod string and its impact contact force with tube in the time domain.
根据求得的时域内抽油杆柱受力变形值以及与油管柱碰撞接触力，计算了抽油杆柱动强度和扶正器安放位置。
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