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Usage：This type of Packer is used in casing, which for tubing & casing annulus and protecting casing. And used to HP acidification, fracturing, cementing, pressure testing and so on. According to string tools selection, could satisfy well servicing operation of finding and sealing of casing leakage.
Structure feature：Run Packer to determined depth, increase pressure in string tool, liquid enter into element through middle tube and slot. Element is inflated, which could seal tubing & casing annulus.
Release pressure to unset Packer. When differential pressure between tubing and casing disappear, rubber element return back by its spring, then to unset Packer. |
