TheCrest III Packer is a weight set service packer for high-pressure remedial work such as acidizing, fracturing, and squeeze cementing. It sets with minimal tubing manipulation and will withstand differential from above or below. When set, a balance piston is actuated, as pressure increases, downward force is exerted on the inner mandrel, thus ensuring the equalizing valve is not pumped open. A large integral fluid bypass allows the packer to be run quickly with minimal chance of swabbing off packing elements or dulling hold-down slips. Rotation is not required to retrieve the tool, and its equalizing valve opens with the first upward movement. Standard equipment includes carbide tipped hold-down slips, lower slips, and drag blocks.