ZT-LWD, an advanced unit developed from ZT-MWD, can measure well trajectory and formation parameter while used for logging.

    Measuring of borehole trajectory parameters including well Inclination, Azimuth, and tool face etc;

    Geological logging while drilling.

    Capable of measuring formation parameters using either real-time data or recorded data obtained.----Dual gamma ray sensor, electromagnetic wave resistivity Sensor.

    With real-time geologic parameters obtained through ZT-LWD, field engineer is able to monitor stratigraphic fluctuation at all times, and have an accurate expectation about what     stratigraphic fluctuation will be like. When used for logging of high angle deviated wells and horizontal wells, geosteering is achieved by optimizing a well trajectory to penetrate the     favorable oil-producing layers. This technology can considerably increase single-well production and recovery ratio.

    ZT-LWD can incorporate rotary steering tool whenever necessary.