Method for perforating a well

Claim 1

IN A METHOD OF PERFORATING A WELL HAVING CASING FILLED WITH LIQUID SET TO A DEPTH BELOW THE DESIRED LEVEL OF THE PERFORATIONS, THE IMPROVEMENT COMPRISING RUNNING TUBING INTO THE WELL TO A DEPTH LESS THAN THE DEPTH OF THE DESIRED PERFORATIONS, SETTING A PACKER IN THE WELL AROUND THE LOWER END OF THE TUBING AT A DEPTH LESS THAN THE DEPTH OF THE DESIRED PERFORATIONS TO CLOSE THE ANNULUS BETWEEN THE TUBING AND CASING, SUSPENDING A DIP TUBE IN THE WELL FROM THE PACKER TO A DEPTH GREATER THAN THE DEPTH OF THE DESIRED PERFORATIONS, SAID DIP TUBE OPENING ABOVE THE PACKERE INTO THE ANNULUS BETWEEN THE TUBING AND CASING, INJECTING A GAS INTO THE UPPER END OF THE TUBING TO DISPLACE LIQUID IN THE WELL BELOW THE PACKER DOWNWARDLY TO THE LOWER END OF THE CASING AND UPWARDLY THROUGH THE DIP TUBE TO DISPLACE THE LIQUID IN THE CASING, BETWEEN THE PACKER AND THE LOWER END OF THE DIP TUBE INTO THE ANNULUS SURROUNDING THE TUBING ABOVE THE PACKER, MAINTAINING LIQUID IN THE ANNULUS SURROUNDING THE TUBING ABOVE THE PACKER LOWERING PERFORATING MEANS THROUGH THE TUBING TO THE LEVEL OF THE DESIRED PERFORATIONS, AND SETTING OFF THE PERFORATING MEANS.