METHOD AND APPARATUS FOR INSPECTING SUBSURFACE ENVIRONMENTS

摘要

Methods for visual inspection of subsurface environment by emplacing a substantially visually clear pipe or casing (11) into the subsurface environment and thereafter introducing visual inspection means, such as a video camera (17) into the pipe (11), whereby inspection of the subsurface environment may be accomplished directly through the wall of the pipe. The inspection may also be accomplished by emplacing an opaque pipe provided with spaced apart visually clear windows (43) into the subsurface, and thereafter introducing visual inspection means (17) into the pipe to inspect subsurface environments through the windows of the pipe. The invention additionally includes improved piping or casing which is constructed of typical opaque materials such as steel (41) but which is provided with visually clear windows (43) appropriately spaced throughout the casing.