DEVICE FOR ZENITH ANGLE MEASUREMENT OF WELL CURVATURE Russian patent published in 2019 - IPC E21B47/22 G01C9/16 

FIELD: oil, gas and coke-chemical industries.

SUBSTANCE: invention relates to oil and gas industry, in particular to devices for measurement of zenith angle of bending of well. Device for measurement of zenith angle of curvature of well, comprising frame, frame-pendulum with eccentric load, in which there is pendulum sensor of large angles and unit of pendulum sensors of small angles, includes two rheostat converters interacting with enclosed between fixed supports pendulums of large length, axis of swinging of which perpendicular to axis of rotation of frame-pendulum. In the pendulum frame a power supply source is additionally installed - a battery, the transducer of the large angles sensor is made in the form of a field Hall sensor, rigidly fixed in frame-pendulum, interacting with magnetic field of permanent magnet, rigidly fixed on free end of pendulum of sensor of large angles. Hall electrode electrodes of the Hall field sensor are connected to the input of an analogue-to-digital converter which is rigidly fixed in the pendulum frame, the output of which is connected to the input of the code converter to the pulse frequency, and its output is connected to the input of a pulse divider, the output of which is connected to the communication channel through a collector. Transducer of small angle transducer is also made in the form of additional Hall sensor. At that, its pendulum is equipped with an additional permanent magnet rigidly fixed on its free end, and its magnetic field acts on an additional field Hall sensor, rigidly fixed in pendulum frame, Hall electrodes of which are connected in parallel to Hall electrode of main field Hall sensor. Length of the pendulum of the sensor of small angles is twice larger than the length of the pendulum of the sensor of large angles, and the Hall sensors are installed near the stops.

EFFECT: technical result is high accuracy of measurement at low zenith angles of curvature of well directly in process of drilling and signal transmission via wireless channel of bottomhole with wellhead due to improved design.

1 cl, 1 dwg