Survey Electronics Assembly (SEA)

The SEA module is a Geolink compatible Directional and Control unit; consisting of the AOM-35A Analogue Orientation Module, and new generation SEA Electronics Assembly. In addition to fully computed Directional data, the module provides 2-axis shock/vibration detection, mud-pulse signal encoding, rotation detection and Gamma/Resistivity tool communications control for the Negative Pulse MWD System.

The modules expands the capability of the Negative Pulse System, to include high temperature wells (175Deg Operating option).

  • High temperature qualified (175ºC Option)
  • Proven/robust technology
  • Low quiescent power consumption
  • Geolink system compatible
  • Up to 20Kpsi Pressure rating
  • Support for fast data transmission
  • Shock and Vibration in Real Time
  • Precision Orientation Module
Value Units Comments
Inclination Accuracy +/-0.1 Deg.
Inclination Repeatability +/-0.05 Deg.
TF/Rotation at >5º Inc - Accuracy +/-0.5 Deg.
TF/Rotation at >5º Inc - Repeatability +/-0.05 Deg.
Azimuth at >5º Inc - Accuracy +/-1.0 Deg.
Azimuth at >5º Inc - Repeatability +/-0.5 Deg.
Dynamic Magnetic TF +/-5.0 Deg.
Vibration Threshold 25 g 2-Axis
Mode Real Time Memory
Value Units Comments
Diameter (Housing) LP 1.895 inches
48.13 mm
Diameter (Housing) HP 2.000 inches
50.80 mm
Length 48.05 inches Excluding coupler
1220.5 mm
52.15 inches Including coupler (make-up)
1324.5 mm
Value Units Comments
Operating Voltage +/-17V Volts Nominal
Accelerometer Scale 1.4 V/g Nominal
Magnetometer Scale 5.0 V/Gauss Nominal
Equivalent ADC Resolution 13 Bit
Quiescent Current <20 mA (+17V only)
Value Units Comments
Operating Temperature SEA-150 -25 to 150 °C (see note 1)
-13 to 302 °F
Operating Temperature SEA-175 -25 to 175 °C
-13 to 347 °F
Survival Temperature SEA-150 -40 to 165 °C
-40 to 329 °F
Survival Temperature SEA-175 -40 to 185 °C
-40 to 365 °F
Hydrostatic Pressure Low Pressure 15,000 psi Maximum (1.895” Hsg)
103.4 MPa
Hydrostatic Pressure High Pressure 20,000 psi Maximum (2.000” Hsg)
137.9 MPa
Vibration 30 g pk 50 – 1000Hz
20 g rms 50 – 1000Hz
Shock 1000 g 0.5mS Half Sine


  1. 175ºC option available

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 for more information.