Patent ID: 8439120

Claim:
A method of sealing annular space between an upright outer tube and an upright inner tube extending within the outer tube along an axial direction thereof, the method comprising the steps of: (a) pouring a liquid seal material into the annular space between the outer tube and the inner tube onto a support member fitted within the annular space between the outer tube and the inner tube in a manner substantially closing around the inner tube, the liquid seal material being poured in an amount sufficient to fill radial space between the inner tube and the outer tube fully around the inner tube; (b) letting the liquid seal material cure in place within the annular space, thereby forming an annular seal between the inner tube and the outer tube; and (c) forming a port in the outer tube at a position therealong below the annular seal and communicating the port with piping outside the outer tube to facilitate discharge of fluid from the annular space to a location outside the outer tube.