Patent ID: 9376874
Filing Date: 2016-06-28
CPC Classification: E21B

Claim Text:
1. A pump apparatus comprising a pump positioned at a drill bit connected to a drill string having a pipe bore for receiving fluid flow wherein at least one ejector nozzle has an outlet directed away from the drill bit in an annulus between the drill string and a borehole, at least one first bore separate and spaced from the at least one ejector nozzle and the pipe bore extends between the annulus at the outlet of the at least one ejector nozzle and a set of nozzles on the drill bit, and at least one second bore separate and spaced from the at least one first bore extends between the pipe bore and the at least one ejector nozzle, the pump being configured to define a flow path directing an entire fluid flow through the pipe bore of the drill string and through the at least one second bore to the at least one ejector nozzle into the annulus and then through the at least one first bore for delivery to the set of nozzles.