摘要
从分析定钻压井底造型的缺陷入手,引出井底造型的新理论——递增钻压井底造型。为方便分析,假设了原井底模型和PDC钻头模型,定义了接触弧长和门限钻压两个概念。从理论和工艺两方面分析认为:递增钻压井底造型可有效维持井底造型过程和保护PDC钻头,加快造型井底的速度,缩短造型井底的时间。在毛坝1井的现场应用证实了递增钻压井底造型的效果,同时也示范了其应用过程和要领。
Based on analyzing the defects of shaping the well bottom at a constant low WOB, this article proposes a new means to do that by increasing WOB step by step. This paper presents the original well bottom model and PDC bits model, and two concepts are defined: contacting arc length and threshold WOB. The theoretical analysis and applications show that PDC bits can be protected effectively, shape of the well bottom can be maintained all the time and made in a shorter time than before by employing the new theory. Its field application in Well Maoba1 demonstrated its advantages and its operating considerations.
出处
《石油钻探技术》
CAS
2003年第6期14-16,共3页
Petroleum Drilling Techniques
关键词
PDC钻头
钻进压力
井底造型
现场试验
PDC bit
bottom hole
molding
theory
field testing
Maoba 1 Well
