Theoretical model for calculating pulling loads for pipes in horizontal directional drilling
Theoretical model for calculating pulling loads for pipes in horizontal directional drilling
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DOI：
10.1016/j.tust.2007.05.009
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发表时间：
2007-09-01
影响因子：
6.9
通讯作者：
Polak, Maria Anna
中科院分区：
文献类型：
--
作者：
Cheng, Elisabeth;Polak, Maria Anna
本文提出了一种计算水平定向钻起拔过程中作用在钻杆上的安装载荷的模型。该模型被实施到一个数值程序PipeForce 2005。该分析包括来自方向变化、流体阻力、固体摩擦和管道重量的牵引载荷贡献。本文的重点是在HDD安装过程中与方向变化相关的细节。该公式将钻孔路径近似为测量点（钻头的现场测量位置）之间的一系列线性段，并预测钻孔路径中管道的形状。基于此形状，钻孔路径的布局和管道刚度，管道和钻孔路径之间的接触力的计算使用柔性杆的挠度理论。计算用于管的拉力以平衡管的重量和管与土壤之间以及管与钻井液之间的摩擦。理论预测和现场数据的比较。(c)2007爱思唯尔有限公司版权所有。
The paper presents a model for calculating installation loads imposed on pipes during the pulling operation in horizontal directional drilling. The model is implemented into a numerical program PipeForce 2005. The analysis includes pulling load contributions from directional changes, fluidic drag, solid friction and pipe's weight. The emphasis in this paper is on details related to directional changes during the HDD installation. The formulation approximates the borepath as series of linear segments between the measured points (field-measured locations of the drilling head) and predicts the shape of the pipe in the borepath. Based on this shape, the layout of the borepath and the pipe stiffness, the contact forces between the pipe and the borepath are evaluated using the theory of deflections of flexible bars. The pulling force for the pipe is calculated to equilibrate the weight of the pipe and friction between the pipe and the soil and between the pipe and the drilling fluid. A comparison of theoretical predictions and field data is presented. (c) 2007 Elsevier Ltd. All rights reserved.