DOM-35D Digital Orientation Module

The μG MEMS sensor is the latest in a range of Azimuth sensors specifically aimed at advancing the technology of downhole directional measurements for the MWD market.

This sensor provides accurate and repeatable directional measurements using the latest in proprietary Azimuth MEMS Accelerometer technology, but partnered with our industry leading flux-gate Magnetometers. This hybrid of technologies means cost savings can be achieved for the end-user, but also improvements are delivered with increased robustness against high shock and vibration.

The μG MEMS sensor is qualified to 150DegC (302F), and tested under the same rigorous conditions expected of all Azimuth sensors.

The DOM-35D is designed to be backwardly compatible with Tensor-based systems and operates with the leading control/processor board units.

MEMS Accelerometers

MEMS Accelerometers

Precision Flux Gate Magnetometers

Precision Flux Gate Magnetometers

Reduced Capital Cost

Reduced Capital Cost

Tensor Compatible

Tensor Compatible

  • Low power consumption
  • High-shock and vibe specification
  • Robust MEMS Accelerometer
  • Accurate, repeatable Inclination measurement
  • Compatible with leading MPUs
  • On-board coefficient storage
  • Independent Mag and Accel switching
  • Increased robustness
  • Reduced cost
  • Reduced ‘downtime'
  • Reduced LIH cost
  • Drop-in Tensor replacement
  • MWD/LWD Borehole Surveying
  • OEM implementation in new MWD systems
Value Units Comments
Inclination Accuracy 125ºC +/-0.15º Deg
150ºC +/-0.2º Deg
Inclination Repeatability +/-0.05 Deg
TF/Rotation at >5° Inc - Accuracy +/-0.5 Deg
TF/Rotation at >5° Inc - Repeatability +/-0.05 Deg
Azimuth at >5° Inc - Accuracy +/-1.0 Deg
Azimuth at >5° Inc - Repeatability +/-1.0 Deg
Value Units Comments
Operating Voltage +/-12.5 to +/- 15.5 Volts (+/-13V nominal)
Active Power Consumption <0.5 Watts Accel & Mags powered
Quiescent Power Consumption 75 mWatts
Interface SPI ADC
I²C EEPROM
ADC Resolution 12
EEPROM Capacity 16 Kbit Internal K-Factor storage
Value Units Comments
Length 29.2 (741.7) Inches (mm)
Diameter³ 1.378 (35.0) Inches (mm) Excludes lateral o-rings
Value Units Comments
Operating Temperature -25 to 150 °C
Survival Temperature -40 to 175 °C
Vibration 30 g pk 50 – 1000Hz
20 g rms 50 – 1000Hz
Shock 1000 g 0.5mS Half Sine

Notes

  1. Independent Magnetometer/Accelerometer power switching
  2. K-Factor storage and download
  3. Excludes lateral shock absorbers
DOM-35D

We provide a responsive repair, calibration and product support service. Our highly experienced and knowledgeable personnel are available to troubleshoot or repair equipment, and provide general product technical assistance.

If you need effective sensor support for your business contact
support@azimuthmwd.com for more information.