Technical status and development direction of workover operation of PetroChina

LEI Qun,LI Yiliang,LI Tao,LI Hui,GUAN Baoshan,BI Guoqiang,WANG Jialu,WENG Dingwei,HUANG Shouzhi,HAN Weiye

Table 1 Technical types of major repair work.

No. Name of Technology 1 Workover risk evaluation 2 Casing detection and inspection 3 Sticking releasing and fishing 4 Casing reshaping and channel opening 5 Casing patching 6 Casing changing 7 Sidetracking/side-deviating 8 Workover fluid comprehensive technology 9 Comprehensive treatment in environment-sensitive areas 10 Plugging and channel-sealing for long wellbore sections 11 Abandonment of oil, gas and water wells