Patent ID: 7954568

Claim:
A nozzle pocket insert assembly for use with a steel body bit, the nozzle pocket insert assembly comprising: a substantially tubular outer sleeve having threads formed on an inner wall of the substantially tubular outer sleeve; a substantially tubular nozzle comprising an erosion-resistant material and disposed in the substantially tubular outer sleeve proximate an exterior surface of a steel bit body, wherein threads formed on an outer wall of the substantially tubular nozzle at least partially engage with the threads of the substantially tubular outer sleeve; a substantially tubular sleeve comprising an erosion-resistant material and disposed in the substantially tubular outer sleeve in longitudinally adjacent substantially abutting relationship to the substantially tubular nozzle; an annular groove formed in at least one of an inner wall of the substantially tubular outer sleeve laterally adjacent the substantially tubular nozzle and an outer wall of the substantially tubular nozzle; another annular groove formed in at least one of the inner wall of the substantially tubular outer sleeve laterally adjacent the substantially tubular sleeve and an outer wall of the substantially tubular sleeve; a further annular groove formed in an outer wall of the substantially tubular outer sleeve; and at least one annular seal disposed in the annular groove, at least another annular seal disposed in the another annular groove, and a further annular seal disposed in the further annular groove, wherein the further annular seal is configured to be in sealing engagement with a wall of a nozzle pocket formed in the steel bit body.