Continuous Automatic Diagraphy – DAC test

The G1-DAC control unit is mounted on drilling machinery that carries out geognostic investigations which continuously record characteristic geotechnical parameters.

Continuous automatic diagraphy is commonly applied to core destruction drilling as an alternative to continuous core drilling or as its integration in areas of known stratigraphy.

It provides additional geological-technical information to the classic analysis of cuttings. It allows evaluations of the mechanical characteristics of the crossed layers.

Sensors for DAC Tests

The sensors that make up the continuous automatic diagraphy system necessary for carrying out DAC tests are:

• Pressure transducer (200 bar fs or other), measurement of thrust pressure
• Pressure transducer (200 bar fs or other), measurement of rotation pressure
• Pressure transducer (200 bar fs or other), measurement of drilling fluid pressure
• G1-EST DAC: displacement transducer with extensible cable, measurement of the depth reached by the tool
• G1-ROT DAC: rod rotation speed meter
• G1-INT DAC: memory button/control switch