The double packer is a system equipped with two infl atable elements. The pump is positioned between two infl atable packers.This confi guration allows selective pumping. The production zone is isolated from the remainder of the bore hole. The distance between the two infl atable elements is adjustable. It is possible to mount the pump below the double packer system. In this case, an undesirable zone is isolated from production by the two infl atable elements.