Sperry Drilling services' SOLAR® MWD/LWD suite allows for the delivery of exceptional performance even under the most extreme downhole conditions. Designed to provide accurate and timely reservoir measurements while maximizing reservoir deliverability, Sperry’s full range of SOLAR® services perform reliably in HF/HP/HT (high-flow/high-pressure/high-temperature) environments. The sensors within the service have been ruggedized to withstand temperatures as high as 175°C and to withstand pressures as high as 30,000 psi, depending on tool size and type. In addition, the entire SOLAR suite of formation evaluation sensors incorporates hightemperature batteries, which allow both recorded data and pumps-off data acquisition under harsh wellbore conditions. This flexibility ensures that quality information about downhole conditions can be obtained throughout the course of the well. During and after drilling, extreme environments can make tremendous demands on downhole equipment. The sensors within our SOLAR service can ensure accurate directional data and steering capabilities through harsh conditions. Wireline-quality reservoir data for effective, economical reservoir characterization is available in real time while drilling and is stored in downhole memory for later retrieval.