Tubing pressure acts against the balance piston, keeping the bypass closed during injection operations. Additionally, tubing pressure engages the hydraulic hold down buttons into the casing to prevent the Packer from being pumped out of the well. The Packer is set by right-hand rotation and slacking off the required weight to pack off the annulus. To unset the Packer, straight pickup of the tubing will first open the bypass valve and equalize pressure, continued pickup will release the packer and automatically engage the packer in the running position for further operations up or down the hole.
