7 Power-operated tools, machines and apparatus for drilling, completing and producing fluids from oil, gas, condensate and water wells, well bores and bore holes, and for intervention in oil, gas, condensate and water, wells, well bores and bore holes; power-operated tools, machines and apparatus for use in drill, completion, intervention and production strings; power-operated tools, machines and apparatus for cementing oil, gas, condensate and water wells, well bores and bore holes; automated battery-operated down hole tools for use in drilling oil, gas, condensate and water, wells, well bores and bore holes; power-operated down hole cementing tools for use in oil, gas, condensate and water wells, well bores and bore holes; power-operated flow control and flow circulation tools for use in oil, gas, condensate and water, wells, well bores and bore holes; subsurface valves being parts of machines; wellheads; oil field pump valve assemblies; hydraulic circulation valves being parts of machines; circulation valves being parts of machines; oil field machines being packers; oil field machines being intervention packers for sealing and securing oil, gas, condensate and water wells, well bores and bore holes; oil field machines being permanent packers for sealing and securing oil, gas, condensate and water wells, well bores and bore holes; oil field machines being packers actuated by electrical submersible pumps (ESP) for sealing and securing oil, gas, condensate and water wells, well bores and bore holes; oil field machines being retrievable packers for sealing and securing oil, gas, condensate and water wells, well bores and bore holes; oil field machines being pocket packers for sealing and securing oil, gas, condensate and water wells, well bores and bore holes; oil field machines being cased hole packers for sealing and securing oil, gas, condensate and water wells, well bores and bore holes; oil field machines being open hole packers for sealing and securing oil, gas, condensate and water wells, well bores and bore holes; subs, namely, submersible pumps for sealing and securing oil, gas, condensate and water wells, well bores and bore holes; down hole subs spacer subs, namely, submersible pumps for sealing and securing oil, gas, condensate and water wells, well bores and bore holes; straddles, namely, belts for machines for sealing and securing oil, gas, condensate and water wells, well bores and bore holes; gas lift straddles, namely, belts for machines for sealing and securing oil, gas, condensate and water wells, well bores and bore holes; perforation cleanup straddles, namely, belts for machines for sealing and securing oil, gas, condensate and water wells, well bores and bore holes; power-operated setting tools for sealing and securing oil, gas, condensate and water wells, well bores and bore holes; power-operated non-explosive setting tools for sealing and securing oil, gas, condensate and water wells, well bores and bore holes; motorized setting tools for sealing and securing oil, gas, condensate and water wells, well bores and bore holes; parts of machines for sealing and securing oil, gas, condensate and water wells, well bores and bore holes, namely, hangers, intervention hangers, suspension hangers, retrievable hangers, plugs, bridge plugs, high pressure plugs, slips, mechanical slips, hydraulic slips, chokes, variable chokes, and hydraulically-operated chokes; parts and fittings for the aforesaid goods