Patent ID: 6026861
Filing Date: 2000-02-22
Classification: A61M,F16L

Abstract:
A method for the in-place insulation of an underground steam pipe within a conduit comprising the steps of:forming a hole in the ground substantially aligned above the steam pipe within the conduit;drilling an aperture in the conduit using a drill without affecting the steam pipe by monitoring a force being applied to the drill;inserting tubing through the length of the formed hole so that a first end of the tubing passes through the drilled aperture and is positioned next to the steam pipe;attaching a second end of the tubing to a pumping system;pumping plastic foam through the tubing around the steam pipe using the pumping system;withdrawing the tubing from the aperture and from the hole in the ground; andcausing the foam to cure and become rigid thereby functioning as thermal insulation for the steam pipe.