The LWD we use is a propagating wave resistivity tool with reliable, robust collar design and a power consumption that is remarkably low. It provides 8 curves of investigation and can operate in memory or real-time modes. The shallow depth of investigation is 2 MHz and the deep investigation resolution is 400 kHz. It provides a high accuracy logs over a wide operating range. An 8 cell battery pack runs the MWD and LWD systems together for 300 hours per pack. This LWD tool offers quality drilling performance and a long time down hole while providing the best measuring range and accuracy.