drill string

Drill string design of drilling complex formations and its application technique study

复杂地层钻井的钻柱设计及使用技术研究

Calculation and analysis of fatigue strength of drill string in deep well

深井钻柱疲劳强度计算与分析

Study on Information and Power Transmission Based on An Intelligent Drill String

智能钻柱信息及电力传输系统的研究

Rule and Application about Drill String Vibration of Extend Reach Well

大位移井钻柱振动规律及其应用

The Acquisition System For Drill String Vibration Signals And The Spectrum Analysis

钻柱振动信号采集系统及谱分析

Study on Dynamic Characteristics and Failure Mechanism of Drill String in Air Drilling

气体钻井钻柱动力学特性及钻柱失效机理研究

Study on measurement system for dynamic characteristics of drill string's bottom

钻柱近钻头力学特性测量系统功能研究

The definition of two special points of drill string and calculation methods

弹性钻柱两个特殊点的意义及计算方法

Practice has proved that, Ansys drill string torsional vibration analysis results really have higher economic value, significant effect, and can improve the quality of engineering greatly.

实践证明，Ansys钻杆柱扭转振动分析成果具有较高的经济价值，极大地提高了钻探工程的质量，效果显著。

Drill string vibration was analyzed based on vibration theory and finite element method.

根据振动理论和有限元方法，研究了钻柱振动的模态。

Analyzing the stability of horizontal drill string by using matrix transfer method

用矩阵传递法分析水平钻柱的稳定性

The Application of Analytical Technology for Drill String Stress Wave Spectral

钻柱应力波频谱分析技术的应用

Computer Simulation of Drill String, Bit and Rock System

钻柱、钻头与岩石系统计算机仿真

Although the structure of drill string seems simple, it bears rather complicated outside force.

虽然钻杆柱在结构上看似较为简单，但实际上，它承受着相当复杂的外力。