Power operated downhole tools used for the drilling of oil and gas, namely, power operated drill bits, reamers, cutters, junk subs and debris catchers; power operated well cleaning downhole tools, namely, power operated wipers, scrapers, brush tools, polishers and scourers for maintaining a clean interior of a casing or liner within a well bore; power operated fluid filters for selectively filtering and removing solids from downhole fluids; and power operated fluid circulators that cause downhole fluid to impact the interior of a casing or a liner within a well bore to provide a cleaning action and which select a path for fluid flow in a casing or liner of a well bore