7 Power operated downhole tools used for the drilling of oil and gas, namely, power operated fluid filters for selectively filtering and removing solids from downhole fluids; power operated fluid circulators that cause downhole fluid to impact the interior of a casing or liner within a well bore to provide a cleaning action, and which select a path for fluid travel in a casing or liner within a well bore; and power operated fluid sampling tools for collecting fluid samples within a well bore; in International Class 7.; Power operated downhole tools used for the drilling of oil and gas, namely, power operated fluid filters for selectively filtering and removing solids from downhole fluids; power operated fluid circulators that cause downhole fluid to impact the interior of a casing or liner within a well bore to provide a cleaning action, and which select a path for fluid travel in a casing or liner within a well bore; and power operated fluid sampling tools for collecting fluid samples within a well bore; in International Class 7.
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