It is very hard to fish the stuck submersible electric pumps in the deep deviated holes in Jidong Oilfield owing to the complicated power package and fairly large pump OD.

• 冀东油田油水井较深、斜度大,电潜泵外径大、机组结构复杂,泵被卡落井事故时有发生,给打捞作业带来很大困难。