Patent ID: 7416021

Claim:
A stripper rubber assembly, comprising: a resilient stripper rubber body having a drillstring bore extending therethrough; an insert support at least partially within said body, wherein the insert support includes a central opening generally aligned with the drillstring bore thereby allowing a drillstring to pass jointly through the central opening and the drillstring bore; and a plurality of stripper rubber inserts each at least partially disposed within said body, wherein said inserts are arranged in a side-by-side non-overlapping manner around the drillstring bore with a first end portion thereof pivotably engaged with the insert support, wherein at least a portion of each one of said inserts is generally flush with an exterior surface of said body, and wherein each one of said inserts is offset from the drillstring bore for precluding said inserts from being exposed from within said body at the drillstring bore.