gas lift valves 150 fig1 are provided above upper packer 110 for selectively introducing high pressure gas into tubing string 24 to assist in bringing oil rich mixture 20 to the surface in wells that do not require additional artificial lift gas lift valves 150 will not be required in use submersible pumping unit 30 and canister 70 is lowered on tubing 24 into well casing 12 to a location above or proximate to disposal perforations 14 and production perforations 16 tubing 24 defines perforated tubing joint 26 pumping unit 30 is suspended on tubing 24 below perforated tubing joint 26 fluids 18 in well casing 12 migrate into well casing 16 through production perforations 16 under certain conditions fluids 18 tend to separate into an oil rich layer 20 and a water layer 22 the two layers 20 22 define an oil water interface 23 in each embodiment and as shown in fig1 lower packer 90 is set in casing 12 above production perforations 16 of well casing 12 lower packer 90 has an outside surface in contact with well casing 12 and an inside surface in contact with canister extension flow directing member 82 lower packer 90 defines an upper limit of production zone 92 and a lower limit of disposal zone 90 central packer 100 is set in casing 12 above disposal perforations 14 of well casing 12 central packer 100 has an outside surface in contact with well casing 12 and an inside surface in contact.