When drilling vertical, horizontal, or extended reach wells, obtaining accurate measurements of inclination and azimuth is a fundamental requirement. For these measurements, Sperry Drilling services offers three types of MWD directional sensors and the Evader® MWD gyro service. All sensors can be used with mud pulse or electromagnetic telemetry systems.
DM (Directional Module)—high-temperature sensor used with the SOLAR™, ExtremeHT-200™ and UltraHT-230™ sensors
PCD (Pressure Case Directional) and PM3 (Position Monitor)—standard temperature sensors
Evader MWD gyro—service used in conjunction with the MWD directional sensors for simultaneously sending up a magnetic survey and a gyro survey at each pump cycle, as well as for measuring gyroscopic toolfaces for orientation