Gas well casing pressure increases cause analysis and processing method

D4 well casing pressure increased because of packer failure,that bringed some safe hidden trouble for pruduction.When Gas well is repairing service operation,blowout and Wells chung risk is big,reservoir protection is difficult,capacity decreased.When adopting sidetracking operations way,the cost is high,the cycle is long and capacity risk is great.In order to solve the tubing running string leakage of safe hidden trouble,adopted oil casing ring empty note nitrogen on inert gas protection,on the casing valve join emergency vent pipe,increasing gas well drilling dynamics method,eventually make the ideal effect.