西南石油大学学报(自然科学版) ›› 2008, Vol. 30 ›› Issue (6): 169-172.DOI: 10.3863/j.issn.1000-2634.2008.06.041

• 博导论评 • 上一篇    下一篇

用等效外径法对塔式钻具组合防斜问题探讨

练章华1 林铁军1 宋周成1,2 孟英峰1 魏臣兴1   

  1. 1.“油气藏地质及开发工程”国家重点实验室?西南石油大学,四川 成都 610500; 2.中国石油塔里木油田分公司,新疆 库尔勒 841001
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-12-20 发布日期:2008-12-20

PROBE INTO ANTIDEFLECTION OF TAPERED DRILLSTRING ASSEMBLY WITH EQUIVALENT DIAMETER METHOD

LIAN Zhang-hua1 LIN Tie-jun1 SONG Zhou-cheng1,2 MENG Ying-feng1 WEI Chen-xing1   

  1. 1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu Sichuan 610500,China;2.Tarim Oilfield Co.,CNPC,Korla Xinjiang 841001,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-12-20 Published:2008-12-20

摘要: 针对气体钻垂直井中塔式钻具组合防斜效果具有不确定性,在三弯矩方程的基础上,提出等效外径法对不等截面的塔式钻具进行力学特性研究,以等效外径法计算为依据,开发了简易的VB程序实现塔式钻具组合的力学分析以及对钻具组合优化设计和钻井参数调整,同时用ANSYS有限元软件二次开发ADPL语言编程实现塔式钻具组合侧向力的计算,这样不仅可以得到等效外径法计算的钻具侧向力大小,也可以得到有限元软件计算出的侧向力数据,并进行两种结果的对比分析。通过实例分析,所编写的VB程序能得到比较准确而且高精度的计算结果,同时探讨了影响钻具防斜效果的原因和改进方案。

关键词: 气体钻井, 塔式钻具, 等效外径法, 井眼轨迹

Abstract: Tapered drillstring assembly as the antideflection drilling tool is commonly used in gas drilling vertical wells,but the effect of antideflection is uncertain.In this paper,equivalent diameter method of Three Moment Formula is used to research unequal crosssection tapered drillstring assembly mechanical properties.A simple Visual Basic(VB) program for analyzing and optimizing tapered drillstring assembly mechanical properties is developed to adjust drilling parameter based on the equivalent diameter calculated.At the same time,ANSYS finite element secondary development program (ADPL) is used to lateral force calculation.Thus,there is comparative analysis of the two results.Case study shows that the VB program for calculating tapered drillstring assembly is more accurate and the calculating results are highly precise.Also,the influencing factor of antideflection drilling is discussed and some suggestion for improvement given.

Key words: gas drilling, tapered drillstring assembly, equivalent diameter method, well trajectory

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