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Usage：This type of Packer is mainly used to stratified fracture, stratified acidification, or stratum separate operations by achieving some technical target.
Structure feature：By hydraulic setting, pull up string tools to unset Packer. Under tubing hydraulic pressure, setting piston move up to open limited system, which could push slip anchor move up to compress element and to achieve setting or anchor. Meanwhile, locking system is in locking position. When hydraulic pressure in tubing is released, slip anchor could not return back cause of locking position and keep of setting. Pull up of string tools, middle tube of Packer move with external parts to open locking position. Other parts return back by friction or spring, which to unset Packer. |
