力学与实践 ›› 2011, Vol. 33 ›› Issue (3): 20-24.DOI: 10.6052/1000-0879-lxysj2010-454

• 应用研究 • 上一篇    下一篇

求解中短半径弯螺杆钻具的纵横弯曲法

唐雪平1,苏义脑2,陈祖锡2   

  1. 1. 中国石油集团钻井工程技术研究院
    2. 北京中国石油勘探开发科学研究院 100083
  • 收稿日期:2010-11-08 修回日期:2011-04-11 出版日期:2011-06-15 发布日期:2011-06-21
  • 通讯作者: 唐雪平

BEAM-COLUMN THEORY FOR BENT HOUSING PDM ASSEMBLIES WITH MEDIUM-SHORT RADIUS OF BUILDING CAPABILITY

Xueping Tang 2, 2   

  • Received:2010-11-08 Revised:2011-04-11 Online:2011-06-15 Published:2011-06-21
  • Contact: Xueping Tang

摘要: 介绍了一种求解中短半径($K=1^\circ$/m$ \sim 3^\circ$/m)弯螺杆 钻具的纵横弯曲法, 以指导弯螺杆钻具的设计和使用. 采用变刚度梁柱理论, 并应用等效载荷法对具有初始结构弯角的梁柱进行等效处理, 根据钻具组合支座连续条件及 边界条件建立了中短半径水平井造斜螺杆钻具组合的力学模型, 进而求得钻头侧向力, 依此 预测弯螺杆钻具的造斜能力. 这种分析方法得到了成功应用.

关键词: 纵横弯曲法

Abstract: A beam-column theory is proposed for bent housing positive displacement motor (PDM) assemblies with medium-short radius ($K=1^\circ$/m$ \sim 3^\circ$/m) of building capability. According to the conditions of continuity at the support and the boundary of the bottom hole assembly (BHA), the mechanical models of PDM building assemblies in horizontal wells of medium-short radius are established based on the non-uniform stiffness beam-column theory and the application of equivalent load to beam-column with initial bent angles. Furthermore, the side force of the drill bit can be caculated and is used to predict the building capability of bent housing PDM assemblies. %This method can be used for bent housing PDM design and well-path control.

Key words: beam-column theory