Devices for measuring the azimuth and the slope of a drilling line

摘要

The invention relates to devices for measuring the azimuth and the slope of a drilling line. These devices comprise, in a container 1, a gyroscope 5 having two principal axes of sensitivity X-X and Y-Y and an accelerometer 12 having two principal axes of sensitivity parallel to those of the gyroscope 5; this gyroscope 5 is connected to a circuit to determine the component of the Earth's rotation vector along the axis of the drilling line.