China API 5CT J55 Casing Crossover Manufacturer Landee offers API 5CT J55 Casing Crossover, 5-1/2" LC, for connecting two casings with different sizes.
China API 5CT J55 Casing Crossover Manufacturer Landee offers API 5CT J55 Casing Crossover, 4 1/2×3 1/2 Inch EUE PIN,linking two sizes of casings.