This invited paper will review key technical and commercial challenges faced by service companies in providing Logging While Drilling (LWD formation evaluation in today's complex drilling environments. Technical challenges ??The Real-time Challenge - getting the most out of the downhole drilling and formation evaluation system while-drilling ??The effect on log quality of faster drilling with rotary steerable systems (RSS ??Evolution of the Operators asset team, and the service company?s role within that team ??Conflicts between the drilling and geological and geophysical objectives and that conflict?s effect on LWD planning and communication Commercial challenges ??Return on Investment from LWD technology ??Shrinking operator research and development (R&D spending and the shift to service companies: The effect on trends and opportunities for the future ??Wide-scale bulk tendering: Does it always bring value to the operator?

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