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Usage：Y141-115/148 Packer could be used to stratified well testing, oil recovery, water plugging and acidification. This kind of Packer could work with slip type Packer together.
Structure feature：Increase pressure by tubing to setting piston. Cut setting shear pin when tubing pressure is high enough, setting piston push spring sleeve up and compress rubber element to get annulus. Spring connect with spring seat, which could prevent rubber element return back as releasing tubing pressure.
Pull up string tools, cut shear pins as soon as the friction between rubber element and casing internal surface is higher than cutting power of unsetting shear pins. Spring and spring sleeve move down together, to unset Packer. |
