摘要
在淹没和非淹没条件下对星形喷嘴射流的破岩能力进行了实验研究。结果表明,在非淹没条件下,星形喷嘴射流的破岩能力高于常规圆形喷嘴射流;在淹没务件下,当喷距小于10倍喷嘴直径时,星形喷嘴射流的破岩能力较圆形喷嘴射流弱,但是当喷距达到10-16倍喷嘴直径时,星形喷嘴射流的破岩能力明显高于圆形喷嘴射流。据此可将星形喷嘴应用于牙轮钻头,替代圆形喷嘴,以提高钻井清岩和辅助破岩效率,达到提高钻井速度的目的。
Experiments with the rock breaking ability of star-shaped jet is presented in this article. It is found that under the non-submerged condition, the rock breaking ability of star-shaped jet is greater than that of round jet; under the submerged condition, within the stand off distance of 10 times do (do is the nozzle orifice diameter), the rock breaking ability of star-shaped nozzle jet is not as good as the round nozzle jet; however, within the 10-16 times do, the rock breaking ability of star-shaped nozzle jet is greater than the round jet. Therefore, star-shaped nozzles, instead circle nozzles, can be fitted on cone bits to improve cuttings cleaning ability and rock crushing efficiency, and then increase the ROP.
出处
《石油钻探技术》
CAS
2004年第6期32-34,共3页
Petroleum Drilling Techniques
基金
中国石油天然气集团公司钻井工程重点实验室科技攻关项目(2001J4-3)
关键词
喷嘴
射流
岩石破碎
实验室试验
实验数据
nozzle
fluidics
rock breaking
laboratory testing
experimental data
