Apparatus for isolating or testing a pipe segment

An apparatus for isolating or testing an interior surface segment of a pipe having an internal diameter, said apparatus comprising:

• a) an annular body with oppositely facing annular ends and defining, on its outer perimeter, a recess;
• b) a pair of bosses, each of said bosses being located on opposite ends of said annular body and coaxial therewith;
• c) a pair of resilient annular members adapted to be respectively and coaxially juxtaposed between each of said bosses and said annular faces;
• d) means for urging the bosses respectively towards said annular body thereby deforming said resilient members in a radially outward direction against the internal surface of said pipe so as to form a seal there between, whereby a sealed annular space is defined between said recess on said annular body, the pipe internal surface and said resilient members;
• and,
• e) a means communicating through said apparatus to said annular space whereby a fluid may be introduced into said space wherein said means for introducing a fluid comprises a first channel for introducing said fluid into the annular space and a second channel for evacuating the annular space or for maintaining the annular space at a desired temperature.