RE:Drilling casing analysisAre you a land guy? This is deep water and they drill with triples so double your stand height. This is a million dollar a day operation. They are using logging at the bit in addition to LWD likely 50-100ft behind the bit. Yes they are getting cuttings samples but that's low tech and quite a long time before they are circulated to surface. Those downhole tools being used tell everyone what they need to know. Once the bit cuts just a couple feet into new formations they can see if it's sand or shale and if it's hydrocarbon bearing. Once section drilled to casing point then wireline will be run using similar tools with even more accurate data quality. Those tools will likely take side wall cores. Logging the pay zones could easily take 3-5 days depending on the number of tools and sample points prior to casing the section.