APPARATUS AND METHOD FOR ISOLATING A SECTION OF A PIPE RISER BORE IN THE COURSE OF RISER RENEWAL

摘要

It is cut off and replaces on the conduit of the polar bear of depth in isolating tool factory. The tool be isolated lower tube aperture from the upper hole so that flammable downhole fluid is blocked from welding position along tube wall. The tool combines: method establishes a pair of axially spaced annular seal and engages pipe inner surface; For downhole fluid ventilation means with earthed surface. The tool primary mechanical properties. It is applied to the operation that connection is updated with offshore platform standpipe.