LWD

The Weatherford^® LWD system delivers the industry’s fastest logging speeds while drilling—up to 400 ft/hr (122 m/hr) for nuclear sensors—while providing wireline-quality log data. All sensors are designed with the same high specifications for borehole pressure and flow rate as the Hostile Environment Logging (HEL^™) MWD system.

The Weatherford^® LWD system includes all components of the HEL MWD system with these additions: multi-frequency resistivity sensor, thermal neutron porosity sensor and azimuthal density sensor.

Multi-Frequency Resistivity (MFR™) sensor

The MFR sensor is an integral part of the Weatherford^® LWD system and is run in conjunction with the Hostile Environment Logging (HEL^™) MWD system. The HEL system provides directional and gamma ray measurement along with bore and annular pressure and downhole shock and vibration information.

The MFR sensor exceeds typical commercial specifications for pressure, measurement accuracy and depth of investigation. The sensor is designed to operate in borehole temperatures and pressures to 356°F (180°C) and 30,000-psi (206.8-MPa), respectively, and flow rates up to 2,000 gal/min (7,571 L/min), depending on hole size. The MFR sensor is available in four collar sizes to fit a wide range of drilling operations.

Azimuthal Density (AZD™) and Thermal Neutron Porosity (TNP™) System

This system is designed as one integral drill collar containing both the AZD and TNP sensors. The design reduces standoff effects on the density measurement and corrects the neutron and density measurements for the effects of standoff and borehole size while drilling. The system maximizes standoff compensation in tool design; handles variations in standoff; and, for data-processing purposes, eliminates data with excessive standoff.

Reliable information and systems keep progress on track, however extreme the environment becomes. The system is designed to operate up to 329°F (165°C) and 30,000 psi (206.8 MPa).