钻柱

重点利用有限元分析软件ANSYS技术和计算机VB编程技术，开发出了一套钻柱受力及振动分析系统软件。

Focus on the use of finite element analysis software ANSYS technology and computer VB programming techniques to develop a set of drill string forces and vibration analysis system software .

钻柱在井筒内自由降落时的运动和受力分析

Force analysis and movement of falling drill string in the wellbore

基于BP人工神经网络的钻柱动态行为预测方法

Prediction method of drilling string dynamic behaviors based on BP artificial network

基于ANSYS的钻柱纵向振动有限元分析及应用

ANSYS-based finite element analysis method of longitudinal vibration of drilling string and its application

大位移井钻柱纵向振动理论计算与ANSYS分析

Theoretical calculation and ANSYS analysis of longitudinal vibration for the drilling string of an extended reach well

该方法结合APIRP14E标准可对钻柱和井壁的冲蚀临界速度进行计算，计算研究表明可通过加载回压控制其冲蚀作用。

The critical erosion velocity of the part element can be computed in this method with the criterion of API RP 14E .

直井中钻柱非线性屈曲的DQ法分析

Differential quadrature method for nonlinear buckling analysis of tubing in straight wells

根据PDC钻头和岩石相互作用的模型，分析了PDC钻头的参数对钻柱粘滑振动的影响。

According to the PDC bit and the rock interaction model , analyzed the influence of the parameters of PDC bit to the stick-slip vibration .

为直井中钻柱非线性屈曲的摩阻分析提供了一种新的算法，同时也将DQ法应用到石油机械工程领域当中。

A new algorithm for the tubing buckling nonlinearly with friction was proposed , and the DQ method can be applied to petroleum engineering field .

该模型考虑了钻杆接头、钻柱旋转和钻柱偏心对循环压耗的影响，适用于幂律和HB钻井液流变模式。

Considerations regarding the effects of drill pipe joints , drill string rotation and eccentricity have been implemented in the present model which is suitable for power law and HB drilling fluids .

文中从RS流体的本构方程出发，理论上推导了RS流体在钻柱内和同心环空中作轴向层流动时的流速、流量、压耗及流核尺寸的大小。

According to RS constituent equation we derive the velocity of flow , flow rate , pressure loss and the size of unsheared plug-flow as RS fluid flowing in pipe and concentric annulus under axial laminar condition .

为了掌握常见的钻柱动态行为及产生原因，应用BP三层人工神经网络模型，采用频谱分布特征、轴心轨迹和振动特征等共15个输入征兆来研究预测4种典型的钻柱动态行为。

To analyze common dynamic behaviors and influencing factors , based on three layers BP artificial network , and by using 15 input symptoms such as spectrum distribution patterns , axes trajectory and vibrating patterns , 4 typical movements of the drilling string are predicted and analyzed .

分析表明：无摩擦时的DQ法计算结果与有限元的分析结果吻合，DQ法能对钻柱的非线性屈曲问题进行正确分析；

It is shown that the results obtained from DQ method with no friction fit well with thoses obtained by finite element analysis , and the nonlinear buckling problem of tubing can be solved by DQ method .

水平井段管柱屈曲与摩阻分析对BHA以上井段，用微单元力平衡分析法具体分析钻柱的受力，给出不同工况下水平井摩阻力计算的简化条件。

EFFECTS OF TUBULAR BUCKLING ON TORQUE AND DRAG IN HORIZONTAL WELL The beam-column theory was applied to calculate the torque and drag in BHA section , and the mini-element analysis was used in uper BHA section .

运用动力间隙元不仅能合理描述钻柱与井壁的接触碰撞过程，还能考虑井壁变形和泥饼的能量吸收，并用Newmark法求解钻柱动力学平衡方程。

This model is solved by dynamics gap element which can not only describe the contact and impact between drilling string and bore hole wall but also present the deformation of bore hole wall and energy absorption of mud cake . The dynamic equilibrium equation is solved by Newmark method .

砾岩地层中钻柱损伤机理分析

Analysing the damage mechanism of drilling string drilling through conglomerate formation

对钻柱在反转情况下横向振动规律的研究

Study on the lateral vibration rule of drilling string under reversion

一种新的大位移井钻柱几何非线性分析方法

New Method for Geometric Nonlinear Analysis of Large Displacement Drill Strings

斜直井中考虑摩擦时钻柱的正弦屈曲分析

Sinusoidal Buckling Analysis of Drill String with Friction in Deviated Wells

水平井钻柱摩阻力几何非线性分析研究

Non-linear geometric analyzing of drill stem drag force in horizontal well

水平井钻柱受力变形分析的曲梁单元

Bent beam unit analysis of drill stem deformation in horizontal well

钻柱在钻井液反馈影响下的横向振动

Influence of drill fluid feedback on lateral vibration of drill stem

钻井实践表明，在钻井过程中钻柱的振动是不可避免的。

The practice indicates , the drill string vibration is inevitably .

钻井液阻尼对钻柱动力失稳的影响

Influence of drilling fluid damp on dynamic destabilization of drill stem

钻柱应力波频谱分析技术的应用

The Application of Analytical Technology for Drill String Stress Wave Spectral

水平井钻柱摩阻力和摩阻力矩的计算

Computation of torque and drag of drill string in horizontal well

钻柱共振是引起深井钻具失效的主要原因。

Drill string resonance is the major cause of drill tool failure .

钻柱纵向受迫振动的广义传递矩阵法

Computing forced longitudinal vibration of drill string by generalized transfer matrix method

钻柱动力学研究及监控技术新进展

The New Developments of Monitoring Technology and Researches on Drill String Dynamics

石油钻柱纵向振动的混沌问题讨论

Discussion on Chaos in Longitudinal Vibration of Petroleum Drill Stem