Gamma Sensors

Model 751AZ

Azimuthal Gamma Sensor with Vibration Detection
Output: Digital
Model 751AZ
Model 751AZ

The Model 751AZ Azimuthal Natural Gamma Sensor is designed to measure and provide continuous gamma radiation data occurring in well bores in order to detect the presence of porous petroleum reservoirs.

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The sensor utilizes a scintillation crystal and tungsten shield design, which shields part of the formation from radiation, allowing operators to “look” in a particular direction into the downhole formation in order to differentiate sands from shales.

The sensors are temperature calibrated to ensure that it is accurate throughout the range.
The sensor does this by utilizing an on board magnetometer sensor which collects data (while rotating or motionless) and allocates this to one of eight bins or quadrants in order to provide real-time continuous gamma data as the sensor is rotating. This allows the downhole lithology to be determined without having to stop an orient the drill string, allowing the well path to be accurately placed inside the producing (sand) zone.

The Model 751AZ sensor can be used as either a standalone system or in conjunction with the Applied Physics Model 750 or Model 760 directional sensors. Communication with the Model 751AZ is by means of a bi-directional TTL serial port. To achieve high gamma sensitivity, a scintillation crystal is used to detect gamma rays.

The Model 751AZ sensor has a two-axis 50 gee vibration sensor to monitor drilling induced vibration and shock. The vibration sensor is oriented to measure axial and lateral shock and vibration.

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