apparatus for isolating or testing an inner surface segment of a pipe and method for testing a segment of a pipe.

摘要

Patent: Apparatus for isolating or testing a pipe segment. a test plug assembly that tests the integrity of a pipe segment that has an inner diameter. the assembly comprises an annular body with opposite annular faces defining at its outer perimeter an annular recess, a pair of protrusions, a pair of resilient annular elements adapted to be juxtaposed between an adjacent protrusion and annular face respectively; a device for propelling the respective protrusions against the adjacent resilient annular element so as to propel it, frictionally engage and seal against the inner diameter of the selected tube and, communicating by mounting in that plenum now defined by said recess, the resilient annular elements and the inner diameter of the pipe where the integrity of that pipe segment can be determined.