INCLINOMETER Russian patent published in 1998 - IPC

FIELD: instrumentation for oil and gas production industry. SUBSTANCE: this is intended for determining azimuth and zenith angles in deep wells. Located in body of inclinometer is sensitive element in the form of non-magnetic float chamber with suspension supports, and their axes are parallel to body axis. Float chamber is of pendulum-action. Two non-magnetic floats are installed in float chamber by means of suspension supports. Floats are of pendulum-action. First float contains sine-cosine rotating transformer, and installed in second float are two magnetometers. Measuring axis of first magnetometer is parallel to axis of second float suspension. Measuring axis of second magnetometer is perpendicular to axis of second float suspension and to arm of its pendulum. Clearances between floats, float chamber and body communicate and are filled with liquid. Gyroscopic sensor of angular velocity is located in first float, and its measuring axis is parallel to axis of first float. Axis of rotor rotation is perpendicular to axis of first float suspension and to arm of its pendulum. Outputs of gyroscopic sensor and magnetometers are connected to input of computing device, in which determined are geographic and magnetic angles of inclinometer course and also determined is its zenith angle. Inclinometer is capable of measuring azimuth angle in wells which are cased by ferromagnetic pipes and also it can do it during operation of drilling machine. EFFECT: higher efficiency. 3 dwg