辽河油田井下大修侧钻公司从1992年4月开始用侧钻技术在177．8mm和139．7mm套管井进行修井。1994年1～11月累计侧钻73口井，其中走向井侧钻38口、139．7mm套管开窗侧钻10口，侧钻成功率100％。在已投产的50口侧钻井中，平均日产原油15．5t，获得了较好的社会效益和经济效益。但 Liaohe Oilfield downhole overhaul drilling company from April 1992 began to use sidetracking technology in 177.8mm and 139.7mm cased well for workover. From January to November 1994, a total of 73 wells were drilled side by side, of which 38 were sideways to the well, 10 were sidetracks with 139.7mm casing windows, and the success rate of sidetracking was 100%. In the 50 wells that have been put into operation, the average daily crude oil production is 15.5t, which has achieved good social and economic benefits. but