双射流喷嘴破岩扩孔的实验研究  

Experimental Study on Rock Erosion Efficiency with a Double-jet Nozzle

作　　者：李根生[1] 易灿[1] 吴波[2] 

机构地区：[1]石油大学(华东)石油工程学院,山东东营257061 [2]江苏石油勘探局钻井处,江苏江都225265

出　　处：《石油钻探技术》2001年第3期9-11,共3页Petroleum Drilling Techniques

基　　金：中国石油天然气集团公司中青年创新基金;石油大学基础研究基金资助项目部分成果论文

摘　　要：利用旋转射流破岩效率高、小水眼可钻出大孔的特点 ,并结合锥形喷嘴有效喷距较长的特点 ,设计了一种新型喷嘴——双射流喷嘴。室内试验结果表明 ,射流喷嘴外旋转角 30°左右破岩效果最佳 ,破岩面积则随着角度增大而增大 ;双射流喷嘴最佳喷距约为当量直径的 5～ 8倍 ;在短喷距情况下 ,双射流喷嘴与普通锥形喷嘴相比 ,破岩效果相近 ,但破岩面积约为 1～A new type of nozzle--double jet nozzle--was designed taking advantages of swirling jet of high rock-breaking efficiency and large hole-forming, combined with the further optimal standoff distance of conical nozzle. The experimental results show that the rock-breaking efficiency reaches maximum at the swirl angle 300 and the rock-breaking area increases with the increase of angle. And the optimal standoff distance is about 5~8d; in short standoff distance, the rock-breaking efficiency is equivalent and rock-breaking area is one to three times larger than that of the conical nozzles.

关 键 词：双射流喷嘴 岩石破碎 实验室试验 高压水射流 油气井 破岩扩孔 

分 类 号：TE921.2[石油与天然气工程—石油机械设备]