Before you bring the tool into the pit, you should test the proper operation of the pistons, since these are generated problems due to faulty O-rings sealing. The best way is to keep the pressure trapped for 10 min.
Review mechanical condition of the casing
This preveerá reaming the well with the consequent elimination of corrosion and scale, are agents that cause latent problems in the packer.
Filling the void and adequate circulation before discharge
The hydrostatic pressure on the packer or packer facilitate their free, avoiding damage to the gums, clean adequate circulation all agents are logged into the packer for the various measures undertaken.