Renown’s ‘DL-H’ Hydraulic Double Grip Packer is a hydraulic set, single-string, retrievable packer, and can be used in virtually any production application. Tubing pump pressure is used to set the packer and the setting force is locked into the packer by a body lock ring. A large internal by-pass reduces swabbing when running and retrieving. The by-pass closes when the packer is set, and opens during the releasing process to allow pressure equalization. Shear screws are used to control the packer release. The standard ‘DL-H’ Packer is designed for differential pressures up to 7,500 PSI.