Numerical Computation Studies on the Debris Lifting Capacity of Conventional Drilling Screw Centralizer

详细信息    查看全文 | 下载全文 | 推荐本文 |

• 作者：Chen ZhengmaoZhang ZhenChen JiafengZhou Chenghua
• 会议时间：2007-10-20
• 关键词：钻井 ; 螺杆钻具 ; 旋转扶正碎片 ; 钻井液 ; 数值计算
• 作者单位：Chen Zhengmao(Management Institute of Xihua Teachers' University)Zhang Zhen(Graduate Student Institute,SVVPU)Chen Jiafeng(Sichuan West Drilling Co. CNPC)Zhou Chenghua(Graduate Student Institute,SWPU.)
• 母体文献：2007年油气藏地质及开发工程国家重点实验室第四次国际学术会议论文集
• 会议名称：2007年油气藏地质及开发工程国家重点实验室第四次国际学术会议
• 会议地点：成都
• 主办单位：中国石油学会
• 语种：chi

摘要

In conventional drilling, the screw centralizer rotates with drilling string at a high speed. When drilling fluids passes through the screw centralizerin annulus, the drastic swirl generated by screw centralizer inevitably influences on the debris lifting of drilling fluid to some extent. Based on the turbulent flow theory of gas/solid phases, 3-D fluid dynamics model is established through finite volume method and is numerically computed in this paper, and the debris lifting capacity of screw centralizer in gas drilling is quantitatively evaluated. Numerical computation results indicate that the initial debris concentration at the inlet port has more obvious influences on the debris lifting capacity. The velocity of lifted debris increases along with the increase of the initial debris concentration; the bigger the particle diameter is, the more obvious the lifting effect of the drastic swirl is. The numerical computation can be used as a guideline for the design of screw centralizer.