A well killing system comprising: a relief well ; a primary well having a wellhead ; a blowout preventer ; a relief well drilling system positioned at a surface of a body of water ; a pipe extending from said relief well drilling system to said blowout preventer ; a relief well injection spool comprising: a body having a pair of inlets opening to a bore on an interior of said body , each of said pair of inlets having a valve cooperative therewith; a ram cooperative with said bore of said body , said ram being selectively movable so as to open and close said bore ; an upper connector affixed to said body so as to connect said body to a lower end of said blowout preventer , said upper connector opening to a said bore of said body ; and characterized by : a wellhead connector affixed to a lower end of said body , said wellhead connector connected to said relief well , said wellhead connector opening to the bore of said body ; and a first line having one end connected to one of said pair of inlets , said first line extending toward the surface of the body of water , said first line adapted to pass a kill fluid to one of said pair of inlets of said body . a relief well ; a primary well having a wellhead ; a blowout preventer ; a relief well drilling system positioned at a surface of a body of water ; a pipe extending from said relief well drilling system to said blowout preventer ; a relief well injection spool comprising: a body having a pair of inlets opening to a bore on an interior of said body , each of said pair of inlets having a valve cooperative therewith; a ram cooperative with said bore of said body , said ram being selectively movable so as to open and close said bore ; an upper connector affixed to said body so as to connect said body to a lower end of said blowout preventer , said upper connector opening to a said bore of said body ; and characterized by : a wellhead connector affixed to a lower end of said body , said wellhead connector connected to said relief well , said wellhead connector opening to the bore of said body ; and a first line having one end connected to one of said pair of inlets , said first line extending toward the surface of the body of water , said first line adapted to pass a kill fluid to one of said pair of inlets of said body . a body having a pair of inlets opening to a bore on an interior of said body , each of said pair of inlets having a valve cooperative therewith; a ram cooperative with said bore of said body , said ram being selectively movable so as to open and close said bore ; an upper connector affixed to said body so as to connect said body to a lower end of said blowout preventer , said upper connector opening to a said bore of said body ; and characterized by : a wellhead connector affixed to a lower end of said body , said wellhead connector connected to said relief well , said wellhead connector opening to the bore of said body ; and a first line having one end connected to one of said pair of inlets , said first line extending toward the surface of the body of water , said first line adapted to pass a kill fluid to one of said pair of inlets of said body . a wellhead connector affixed to a lower end of said body , said wellhead connector connected to said relief well , said wellhead connector opening to the bore of said body ; and a first line having one end connected to one of said pair of inlets , said first line extending toward the surface of the body of water , said first line adapted to pass a kill fluid to one of said pair of inlets of said body . <EOS>