Packer Unset Solution Study in Daniudi Gas Filed

Accidents happened in many wells because of the fracturing packer sticking in Daniudi Gas Field. The main causes of sticking are slips being not back of hydraulic anchor or packer, rubber rupture, rubber not being released and so on. Based on it, 6 measures to deal with the accidents were proposed including vigorous pulling back off, pressure building unfreezing, suspension releasing etc. Field application analysis was conducted for every measure and it provided reference for this kind of sticking accidents treatment.