GABI™ Gamma-At-Bit and Inclination Sensors

The Sperry Drilling GABI™ motor is equipped with at-bit azimuthal gamma ray and inclination measurements for improved geosteering and optimum wellbore placement.

The GABI sensor package can be mounted below the power unit of the selected SperryDrill® positive displacement motors to deliver immediate feedback on directional trends and formation changes. By providing four independent gamma ray readings simultaneously in four directions around the tool, the GABI sensor delivers full wellbore coverage even in ‘sliding’ mode without the need to orient the motor for up, down, left and right readings. Locating the sensors close to the bit makes it possible to detect adjacent bed boundaries before exiting the pay zone, and avoid wasting time drilling non-productive footage. Inclination readings from just behind the bit contribute to flatter, longer horizontals and more accurate wellbore placement.

GABI Sensor Applications

  • Geosteering horizontal wells
  • Detecting approaching bed boundaries with high gamma ray contrast
  • Maintaining tight trajectory control when drilling in formations with high steering difficulty
  • Drilling horizontals in gas reservoirs where extremely flat trajectories can improve production
  • Determining dip direction via borehole imaging for better reservoir understanding
  • Stopping precisely at desired casing/coring points

GABI™ Downhole Drilling Motor

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