摘要
对于特别坚硬、研磨性强、互层频繁、含有石英和砾石夹层的地层,PDC钻头无法钻进,机械钻速较低,且破坏形式磨损快,复合片容易破裂,因此寿命很低.而牙轮钻头钻进也因为该类地层坚硬等缘故,钻进效率很低,并容易造成孔内掉牙轮等事故出现.针对这种问题,研制了一种低温电铸孕镶脉冲石油钻头,对钻头的流场进行了数值模拟.该钻头在现场的应用表明,它具有寿命长、机械钻速高的特点.
For the strata with features of extreme hardness,strong abrasiveness,high frequency of interbedding,with quartz and gravel interlayer,PDC bit is barely to be employed as a result of low ROP and service life,embodied as fast wear of working layer,easily breaking of diamond compact,etc.The roller bit is not suit for this kind of strata either,and drilling accident might be caused by losing teeth.To solve this problem,the pulsing impregnated petroleum bit with low-temperature electroplating is developed,and numerical simulation is employed for the hydraulic performance of bit flow field.Field applications show that this kind of new bit enjoys the advantage of long service life and high ROP.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2012年第3期598-604,共7页
Earth Science-Journal of China University of Geosciences
基金
中国石油化工集团2010年科研项目(No.SG10028)
关键词
孕镶钻头
射流
脉冲
数值模拟
impregnated bit
jet flow
pulse
numerical simulation.
