CAMERA ASSEMBLY FOR USE IN A SUBTERRANEAN WELL

摘要

A camera assembly (6, 102, 202) for use in a subterranean well (2) is provided, the camera assembly (102) comprising a pressure resistant outer housing (104) defining a chamber (106) therein, at least a portion (126) of the chamber (106) being thermally insulated; an optical sensor (142) disposed within the thermally insulated portion (126) of the chamber (106) in the outer housing (104); a pressure resistant optical window (116) for receiving light from outside the assembly to be conveyed to the optical sensor (142); a lens assembly (140) disposed to receive light entering the assembly through the optical window (116); and a gradient index lens relay (146) extending between the lens assembly (140) and the optical sensor (142) for conveying light received through the optical window (116) from the lens assembly (140)to the optical sensor (142).