石油学报 ›› 1992, Vol. 13 ›› Issue (3): 118-125.DOI: 10.7623/syxb199203016

• 石油工程 • 上一篇    下一篇

下部钻具组合大挠度问题权余法分析

高德利, 刘希圣   

  1. 石油大学 北京
  • 收稿日期:1989-11-18 出版日期:1992-07-25 发布日期:2013-07-08
  • 作者简介:高德利,1958年生.1981年毕业于华东石油学流钻井专业;1984年获硕士学位,1990年获石油大学博士学位.现为清华大学博士后研究人员.通讯处:北京学院路石油大学.邮政编码:100083
  • 基金资助:
    国家教委博士点基金

A Method of Weighted Residuals for the Analysis of BHA Under Large Deflection

Gao Deli, Liu Xisheng   

  1. the University of Petroleum, China
  • Received:1989-11-18 Online:1992-07-25 Published:2013-07-08

摘要: 应用加权余量法(简称权余法)对下部钻具组合(BHA)大挠度问题进行求解的基础上编制了简单通用的BHA大挠度分析程序,它具有通用性强、计算精度高及简单省时等优点,可以在微机上运行,能模拟计算各种转盘钻下部钻具组合的大挠度力学特性.通过典型计算,本文阐明了井眼曲率对BHA大挠度非线性效应的重要影响,并且给出了BHA小挠度分析程序的大体适用范围.

关键词: 钻具组合, 弹性曲杆, 定向井, 水平井, 加权余量法

Abstract: Three-dimensional analysis of the static behavior of a bottomhole assembly(BHA)under large deflection has been carried out successfully with the method of weighted residuals(MWR).The BHA analysis program thus developed has the advantages of universal application,higher accuracy,simplicity and time saving,and is suitable for the computation for a variety of BHAs under large deflection.The results obtained by the typical computation show that some large deflection effects on BHA behavior increase with increased borehole-curvature、and an analysis program for BHA under small deflection should not be used in medium or large-curvature drilling.