Compressive seal and pressure control arrangements for...

Details Compressive seal and pressure control arrangements for... Compressive seal and pressure control arrangements for...

F - Mech Eng,Light,Heat,Weapons

16

J

255/12

F16J 15/40 (2006.01) E21B 4/00 (2006.01)

Patent

CA 1314864

ABSTRACT OF THE DISCLOSURE The disclosure relates to downhole drilling motors which include seal arrangements and pressure control assemblies for staging the pressure between the two seal assemblies, with each pressure control assembly including a rotary element for dis- placing a piston, and the piston controlling one or several valves.

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