Angled borehole measuring device

摘要

The measuring device has a housing (1) containing a sensor unit (2), lowered into the borehole via a measuring cable and including 3 orthogonal static acceleration sensors (7, 8, 9) and a pair of gyros (10, 11) with perpendicular measuring axes. The sensor unit is coupled within is coupled within the housing to an electronic module (3), incorporating a voltage supply stage, an electronic gyro circuit and a signal processor and is supported by an internal sleeve (13) allowing it to rotate about the longitudinal axis of the housing. One of the gyros (11) can pivot through an angle of 180 degrees.