The most important problems are frequent seizing in fishing pressureout set,poor packer setting effect,and low pipe string sealing,resulting in high rework rate.

• 其中现场出现的最主要问题是生产过程中打捞憋压套发生卡阻几率高,以及封隔器坐封效果不好,管柱密封率低,造成高作业返工率。