Furnace tube inspection apparatus

A conduit inspection apparatus comprising:

• at least first, second, and third fluid propelled shells, each fluid propelled module shell for propelling the module shell through a conduit and having an axially contoured exterior and having a length that is 1.0 to 2.4 times its outer shell diameter and the length being transverse to the diameter, the contoured exterior having a saddle depression for negotiating a bend radius of the conduit that is less than twice as large as the outer shell diameter of each fluid propelled module shell;
• and
• a first flexible, non-jointed intermodule connector joining the first and second fluid propelled module shells, a second flexible intermodule connector joining the second and third shells, and each connector having a length that is 0.5 to 2.0 times the outer shell diameter of the fluid propelled module shells and the apparatus is sufficiently contoured and flexible to negotiate a bend radius of the conduit that is less than twice as large as the outer shell diameter of each fluid propelled module shell.

A conduit inspection apparatus comprising:

• at least first and second fluid propelled module shells, each fluid propelled module shell for propelling the module shell through a conduit and having an axially contoured exterior and an outer shell diameter, the contoured exterior having a saddle depression for negotiating a bend radius of the conduit that is less than twice as large as the outer shell diameter of each fluid propelled module shell;
• and
• a flexible intermodule connector joining the first and second shells, and the apparatus is sufficiently contoured and flexible to negotiate a bend radius of the conduit that is less than twice as large as the outer shell diameter of each fluid propelled module shell.

A conduit inspection apparatus comprising:

• at least first, second, and third fluid propelled shells, each fluid propelled module shell for propelling the module shell through a conduit and having an axially contoured exterior and an outer shell diameter, the contoured exterior having a saddle depression for negotiating a bend radius of the conduit that is less than twice as large as the outer shell diameter of each fluid propelled module shell;
• and
• a first flexible, non-jointed intermodule connector joining the first and second fluid propelled module shells, a second flexible intermodule connector joining the second and third shells, and the apparatus is sufficiently contoured and flexible to negotiate a bend radius of the conduit that is less than twice as large as the outer shell diameter of each fluid propelled module shell.