7 Power-operated tools, machines and apparatus for drilling, completing, cementing, producing fluids from, and intervention in oil, gas, condensate and water wells, well bores and boreholes, and for use in drill, completion, intervention and production strings; automated battery-operated downhole tools for use in drilling oil, gas, condensate and water wells, well bores and boreholes; power-operated downhole cementing tools for use in oil, gas, condensate and water wells, well bores and boreholes; power-operated flow control and flow circulation tools for use in oil, gas, condensate and water wells, well bores and boreholes; subsurface valves being parts of machines; wellheads; oilfield 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 boreholes; oil field machines being permanent packers for sealing and securing oil, gas, condensate and water wells, well bores and boreholes; oilfield machines being packers actuated by electrical submersible pumps (ESP) for sealing and securing oil, gas, condensate and water wells, well bores and boreholes; oil field machines being retrievable packers for sealing and securing oil, gas, condensate and water wells, well bores and boreholes; oil field machines being pocket packers for sealing and securing oil, gas, condensate and water wells, well bores and boreholes; oil field machines being cased hole packers for sealing and securing oil, gas, condensate and water wells, well bores and boreholes; oil field machines being open hole packers for sealing and securing oil, gas, condensate and water wells, well bores and boreholes; subs, namely, submersible pumps for sealing and securing oil, gas, condensate and water wells, well bores and boreholes; downhole subs spacer subs, namely, submersible pumps for sealing and securing oil, gas, condensate and water wells, well bores and boreholes; straddles, namely, belts for machines for sealing and securing oil, gas, condensate and water wells, well bores and boreholes; gas lift straddles, namely, belts for machines for sealing and securing oil, gas, condensate and water wells, well bores and boreholes; perforation cleanup straddles, namely, belts for machines for sealing and securing oil, gas, condensate and water wells, well bores and boreholes; power-operated setting tools for sealing and securing oil, gas, condensate and water wells, well bores and boreholes; power-operated non-explosive setting tools for sealing and securing oil, gas, condensate and water wells, well bores and boreholes; motorized setting tools for sealing and securing oil, gas, condensate and water wells, well bores and boreholes; parts of machines for sealing and securing oil, gas, condensate and water wells, well bores and boreholes, 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