摘要
利用侧向水力工具的旋转射流冲击沉积的岩屑床破坏其"稳定"状态,并对井底流场进行扰动,增大环空内泥浆的紊流度,可以达到增强环空钻井液携岩能力的目的。在K-ε方程数学模型的基础上模拟计算了使用侧向水力工具旋转射流时的流场,得出了其流场速度分布矢量图;模拟结果表明,旋转射流的冲击作用明显;在实际环空返速下,侧向射流受到的干扰较小,与理论分析结果偏差不大;而最好的喷射角度为与环空返速呈75°。
It was feasible to use the rotary jet produced by the lateral hydraulic tool to enhance the ability of carrying cuttings in annular by destroying the stable cuttings bed,disturbing the flow field in the borehole and increasing the mud turbulence number in the annular.On this basis of the K-εequation,the flow filed when using the lateral hydraulic tool was calculated,the flow velocity distribution vector diagram was obtained.The simulation results showed that the impact effect of rotary jet was obvious,in the actual annulus velocity,the interference on the lateral jet and the deviation from the theoretical analysis were both small,so this tool could be used to clean cuttings effectively.And the best jet angle was 75°.
出处
《钻采工艺》
CAS
北大核心
2012年第6期1-3,6,共3页
Drilling & Production Technology
基金
中国石油塔里木油田公司项目"塔中第三套井身结构水平井钻完井工艺研究"(编号:201011030110)的部分成果
关键词
大位移井
岩屑床
旋转射流
扰动
数值模拟
extended reach well
cuttings bed
swirling jet
disturbance
numerical simulation
