AT-Permanent Packers feature the largest possible bore through combined packer and seal accessory. The AT-Permanent Packer is run to depth, connected to the tubing with a Model KC Anchor Tubing Seal Assembly, and is set by applied tubing pressure. This makes the packer ideal for use in high angle deviated wells common in offshore operations. The AT-Permanent Packers are designed to give maximum strength, uniformity of setting pressure and standardization of all alloy materials for H2S service.