石油学报 ›› 2013, Vol. 34 ›› Issue (6): 1163-1167.DOI: 10.7623/syxb201306017

• 石油工程 • 上一篇    下一篇

旋风状井底模型的新型钻头运动特性

田家林1,2, 庞小林1, 梁政1, 杨琳1, 张亮3, 魏秦文1,4, 李友1, 朱永豪1   

  1. 1. 西南石油大学机电工程学院 四川成都 610500;
    2. 西南交通大学机械工程学院 四川成都 610031;
    3. 四川深远石油钻井工具有限公司 四川成都 611731;
    4. 中国石油天然气管道局 河北廊坊 065000
  • 收稿日期:2013-05-10 修回日期:2013-09-05 出版日期:2013-11-25 发布日期:2013-10-13
  • 通讯作者: 田家林
  • 作者简介:田家林,男,1979年2月生,2001年获西南石油大学机械工程专业学士学位,2009年获西南石油大学石油矿场机械专业博士学位,现为西南石油大学副教授,主要从事机械设计及理论、井下工具研究工作。Email:tianjialin001@gmail.com
  • 基金资助:

    国家自然科学基金项目(No.51074202,No.11102173)、四川省教育厅成果转化重大培育项目(省教667)和石油天然气装备教育部重点实验室项目(STS01)资助。

Kinematic features of a new drill bit of the tornado-like bottom-hole model

TIAN Jialin1,2, PANG Xiaolin1, LIANG Zheng1, YANG Lin1, ZHANG Liang3, WEI Qinwen1,4, LI You1, ZHU Yonghao1   

  1. 1. School of Mechanical Engineering, Southwest Petroleum University, Chengdu 610500, China;
    2. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China;
    3. Sichuan Deep & Fast Oil Drilling Tools Co., Ltd., Chengdu 611731, China;
    4. China Petroleum Pipeline Bureau, Langfang 065000, China
  • Received:2013-05-10 Revised:2013-09-05 Online:2013-11-25 Published:2013-10-13

摘要:

针对现有钻头心部破岩效率不高的情况,提出一种旋风状井底模型的新型钻头(旋切钻头)。通过研究旋切钻头的运动行为,分析钻头自转坐标系与公转坐标系,建立切削齿位置方程与速度方程,确定切削齿与岩石的接触段,得到接触段上的速度分布结果。根据算例计算与分析发现旋切钻头破岩过程大圈齿过中心,利用冲击与切削综合作用进行破岩,从井底为接触起点,井壁为接触终点,切削齿破岩行为具有从下往上、从里往外“刨”的效果。研究结论对于提高钻头心部破岩效率,进行切削齿破岩机理研究具有参考意义。

关键词: 旋风状, 钻头, 井底模型, 破岩, 机械钻速

Abstract:

In view of the low rock-breaking efficiency at the borehole center of the existing drill bit, a new drill bit of the tornado-like bottomhole model (rotary-cutting bit was)presented. By examining the bit motion behavior with the cylindrical coordinate, bit self-rotation and revolution coordinate systems were analyzed, and established position and velocity equations of cutting tooth, determined the contact section of cutting tooth with rocks and got the velocity distribution on the contact section. The experiment was designed with corresponding parameters of numerical examples and both the calculation and experiment results were verified. The calculation and analysis of numerical examples indicated that the maximum tooth row passes through the borehole center and breaks rocks with crushing and cutting effect. With a start point at bottomhole and end point at the borehole wall, the contact force of cutting teeth on rocks has a "digging" effect upward and outward. The conclusions are of reference importance in improving the bit rock-breaking efficiency at borehole center and investigating rock-breaking mechanisms of cutting teeth.

Key words: tornado-like, drill bit, bottomhole model, rock breaking at borehole center, rate of penetration (ROP)

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