Renown’s ‘Annihilock’ Releasable Hydraulic Anchor System is used in tandem with Renown’s Model ‘HDO’ or ‘HDO-2’ Hydraulic Liner Packer as part of Renown’s patented One-Trip System of setting a liner packer/hanger with a Retrievable Isolation Plug. The ‘Annihilock’ allows for temporary anchoring of the Liner Packer System and still be able to hydraulically set and mechanically release the in-place ‘R.I.P.’ Plug in the One-Trip System.