磨料浆体旋转射流破岩钻孔特性实验研究.pdf

2005 年 第29 卷 石油大学学报( 自然科学版) Vol. 29 No . 3 第3 期 Journal of the University of Petroleum, China Jun. 2005 : 1000-5870( 2005) 03-0045-04 磨料浆体旋转射流破岩钻孔特性实验研究 杨海滨, 杨永印, 沈忠厚, 王瑞和, 周卫东 ( 中国石油大学石油工程学院, 山东东营 257061) : , , , / V0 , 1. 2 , 4 : ; ; ; : T E 248; TP 69 : A Experimental study of rock drilling with abrasive suspension swirling jet YANG Ha-i bin, YANG Yon -y in, SHEN Zhon -hou, WANG Ru-i he, ZHOU We-i don ( Colleg e of P etr ole um E ng ineer ing in China Univ ersity of Petroleum , Dongy ing 25706 1, China) Abstract: Rock drillin experiment was conducted with abrasive suspension swirlin jet ( ASSJ) under submer ence mode. In the experiment, polyacrylamide was used as additive to condense jet fluid and abrasive particles were drawn into the fluid hydraulically from an abrasive container linked on the hi h-pressure fluid delivery pipeline. The results show that the bottom hole shape of rock drillin w ith the ASSJ under submer ence mode looks like/ V0 . The drillin-hole dioumeter of the ASSJ increases by 1. 2 times and rock drillin volume increases by 4 times compared with non-swirlin jet drillin of rock under identical conditions. It is also found that with hi her polyacrylamide concentration in jet fluid, the ASSJ can si nificantly increase drillin depth. Key words: abrasive suspension sw irlin jet; polyacrylamide; rock drillin ; experiment , , , 0. 2~ 0. 4 mm , 16% , ( 2~ [ 1] 7 7 , 2. 4) @ 10 ( 0. 8~ 1. 2) @ 10 , , , , , [ 2, 3] ( PAM) , , 1 ,