Patent ID: 8770897

Claim:
A system for aligning a coring tool relative to a pipe sidewall, the system comprising: a hollow, cylindrical hole saw mounted to an arbor that has an elongated pilot shaft centered in the hole saw; a base plate attachable to the pipe sidewall and including a first terminal end having a first planar surface, a second terminal end having a second planar surface opposite the first terminal end, and spaced apart peripheral feet protruding from an underside of the base plate to contact the pipe sidewall, wherein each foot extends from the first planar surface to the second planar surface, wherein the first planar surface extends between a first end of a first foot and a first end of a second foot, and the second planar surface extends between a second end of the first foot and a second end of the second foot; a sleeve aperture through the base plate and having a bore diameter sized such that it receives the pilot shaft as the hole saw is advanced toward and saws through the pipe sidewall; wherein the plate is sized to fit inside the hole saw as the hole saw saws through the pipe sidewall.