7 Machines and machine tools for use in completing oil and gas wells and in the production of oil and gas from wells, namely, wellheads, geothermal wellheads, subsea wellheads, mud line suspension systems comprised of hangers, connectors, spools, valves and/or seals, wellhead systems comprised of wellhead, hangers, connectors, spools, valves and/or seals, adjustable wellhead systems comprised of wellhead, hangers, connectors, spools, valves and/or seals, subsea wellhead systems comprised of wellhead, hangers, connectors, spools, valves and/or seals, surface wellhead systems comprised of wellhead, hangers, connectors, spools, valves and/or seals, exploration wellhead systems comprised of wellhead, hangers, connectors, spools, valves and/or seals, surface or subsea controls, namely, power and communication systems which provide hydraulic, electrical or electrohydraulic control and monitoring for production equipment in the field of oil and gas, multiport selector manifolds, namely, parts of oilfield wellhead machines, namely, gate valves, ball valves, check valves, plug valves, globe valves, choke and manifold industrial pumps, pump and valve parts, pipe fittings and flanges for use in combining production and testing of multiple production manifolds,annulus monitoring and lockdown sleeves for wellhead machines, suspension systems comprised of hangers, connectors, spools, valves and/or seals for oil and gas wells, wellhead machine trees, wellhead machine dry trees, wellhead machine wet trees, conversion wellheads for oil and gas wells; metal parts and fittings of oilfield wellhead machines, namely, connectors in the nature of pipe fittings and flanges, casing connectors in oil and gas wells, subsea wellhead temporary abandonment caps, tie back connectors for wellheads; running machine tools, namely, tools to place, set and retrieve pieces of downhole equipment in oil and gas wells