Brief on tools: Logging tools are electronic cartridges housed in a pipe shaped metal housing used to acquire valuable data regarding the formation lithology and gives the idea of hydrocarbon contents in the formation. These tools are designed to work at 20,000-PSI pressure & 250 deg C Temperature and communicate to surface system via a telemetry protocol. Varieties of tools are available for different purposes like nuclear, resistive, sonic, magnetic, dipmeter, production etc. and use specific techniques to extract the required information from the well.