The packer off liner -- the GW is run in below a wing or baffle coupling. The coupling serves to center the packer and supports the tubing on the liner. Tubing may also be spaced in liner with anchor-pipe below the packer. Circulation from casing to tubing may be established, if desired, by circulating down the casing past the cup lips and up the tubing. In this installation, cup lips are pointing down with ample fluid passage around the packer before entering liner.
To pack off mud or fluid in casing above packer, the GW is run in above an anchor pipe with a Type S or SJ slide valve above the packer. Valve is open while running in to allow fluid to bypass packer on which cups are assembled with lips pointing up. With anchor pipe resting on bottom and valve closed, the GW will pack off mud or fluid in casing above the packer. Well may then be swabbed in through the tubing leaving the casing loaded with fluid.
To pack off casing and produce through casing on pumping well without tubing leaks, the GW is run in with a standing valve, working barrel, and perforated mandrel above the packer in the order named and an anchor pipe below the packer on which the cup lips are pointing up. A double stuffing box is used at the wellhead. Tubing may be filled with fresh oil and the well pumped to produce through the casing. Fresh oil will stay in the tubing and keep the rods lubricated. If tubing should later leak, well could be produced through either casing or tubing without disturbing the installation.
To pack off casing in a pumping well with tubing leaks, the GW is run in with a working barrel, standing valve, and anchor pipe below the packer in the order named and a perforated mandrel above the packer on which the cup lips are pointing up. A double stuffing box is used at the wellhead. Tubing and casing may then be filled with oil or water and the well pumped to produce though either casing or tubing. If it is not possible to fill casing from the surface, the well may still be pumped and tubing and casing filled with well fluid, after which, the well will produce through either casing or tubing as desired.
To pack off in both directions, the GW four-cup packer is run in the well with two cups pointing up and two cups pointing down. Two or more packers may be run in series to isolate specific zones and for spotting operations when used in conjunction with perforated mandrels. The above applications are only a few of many for which this versatile packer may be used. Other possible uses to fit specific well requirements will suggest themselves to the production menu, service man, engineer, or drilling superintendent.