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GeoTracker™ Duo

At-Bit Azimuthal Propagation Resistivity & Azimuthal Gamma Tools

Maximize the value of your asset with the combined power of at-bit azimuthal propagation resistivity & at-bit azimuthal gamma to perform accurate well placement in response to either lithology variations or formation fluid changes or both. 



Key Features

  • Dual-frequency attenuation & phase-shift resistivity measurements

  • Temperature compensated measurements for maximal thermal stability

  • 16 sectors of attenuation & phase-shift resistivity in memory

  • Up to 4 quads of attenuation or phase-shift resistivity in real time

  • 16 sectors of gamma in memory

  • Up to 4 quads of gamma in real time

  • Total gamma measurements in real time

More Features

  • Boundary detection distance up to 30 in. (0.76 m)

  • Continuous inclination measurement

  • Downhole RPM measurement

  • 3-axis shock & vib monitoring in real time

  • Can be run either below or above motor (with proper connections)

  • Works in any type of muds including OBM

Collar Size(s) Available

  • Available in 6-3/4 in. and 8 in. collar sizes

  • Modular packaging design permits battery, resistivity/gamma sensor, or electronics replacement in shop or at rig site

  • Very short sub (2.92 ft or 0.89 m) optimizes bit steerability

  • Drop-in EM short-hop receiver retains MWD tool string retrievability

  • Powered by self-contained batteries with battery life up to 150 hours

Azimuthal propagation resistivity & azimuthal gamma from one sub

Responds to lithology variations or formation fluid changes or both

Available in both standard version (150°C) and high-temperature version (175°C) 

  • Place wells accurately and maximize reservoir contacts with a clear view the geology around the bit while in rotating or sliding mode

  • Identify target zones timely with the superior gamma ray images located as little as 1.3ft from the bit

  • Early detection of changes in lithology

  • Steer within formations with lateral dip and/or thickness changes



  • GeoTracker Duo provides both bulk resistivity and total gamma measurements in addition to azimuthal resistivity and azimuthal gamma measurements.

  • GeoTracker Duo is a plug-'n-play module that can be dropped anywhere on a BHA (with proper connections).

  • GeoTracker Duo uses our universal, field-proven EM short-hop communications system, eHop, for transmission of at-bit data across motor to the MWD system above the motor.

  • GeoTracker Duo sensor modules, electronics modules, and hatch covers fit all the different collar sizes.

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