I pointed out above the Deepwater figure is depth from ocean surface while the Chikyu figure is depth below the ocean floor, so as long as the depth of the ocea

I pointed out above the Deepwater figure is depth from ocean surface while the Chikyu figure is depth below the ocean floor, so as long as the depth of the ocean is ~20,000 feet where the Chikyu drilled to that depth, it all checks out.