DEVELOPMENT AND APPLICATION OF Y341B-115 SERIES STEP-BY-STEP RELEASABLE PACKER

In view of difficulties of current multilayer water plugging packer in setting and releasing, designed setting mechanism, latch mechanism, seal check mechanism, balance protect mechanism and step-by-step releasable mechanism. it has characters such as easy operation, reliably release, lower release loading(less than 20 kN), depepdable seal check and use in multilevele can check each packer. Its balance protect mechanism makes packer can hold pressure comes from up and down, Optimized acrylonitrile-butadiene rubber, enhanced pressure and temperature resistance of sealing rubber. Provide pin to avoid sealing at midway and protect seal part of packer, enhanced reliability of plugging string. Applications have got achievement.