Pump mechanism for cooling of rotary bearings in drilling tools and method of use thereof

An apparatus for use in a wellbore, comprising:

• a drill string;
• a bearing positioned along the drill string, the bearing having a inner rotating section connected to the drill string and an outer non-rotating section, wherein a first gap separates the rotating section from the non-rotating section;
• and
• an active flow device formed in the bearing, the active flow device being configured receive a fluid received from a second gap in the outer non-rotating section of the bearing and flow the fluid through the first gap and across the bearing, wherein the second gap receives the fluid from an annulus formed between the drill string and a wall of the wellbore.

A system for use in a wellbore, comprising:

• a rig disposed over the wellbore;
• a drill string conveyable into the wellbore using the rig;
• a bearing positioned along the drill string, the bearing having a rotating inner section connected to the drill string and a non-rotating outer section, wherein a gap separates the rotating section from the non-rotating section;
• and active flow device formed in the bearing, the active flow device having a gap in the non-rotating section for receiving a fluid from an annulus formed between the drill string and a wall of the wellbore and being configured to flow the fluid through the gap and across the bearing.