METHOD OF DETERMINING ZENITH AND SIGHT ANGLES Russian patent published in 1998 - IPC

FIELD: determination of angular parameters of space orientation of well path and well objects. SUBSTANCE: method includes measurement of signals of angle-of-rotation transducer of two single-degree pendulums of converter. Longitudinal axis of rotation of converter body and transducers rotation axes form rectangular coordinate system. Measured a priori are parameter σ-angle of deviation of rotation axis of the first pendulum from axis OX of converter body base in plane OXY; parameter ρ - angle of deviation of the second pendulum from axis of OY of body base in plane OYZ, and zenith angle and sight angle are determined by measured values of angles of rotation of the first pendulum γ and second pendulum β₂ and by measured values of σ, ρ and γ from mathematical expression. EFFECT: higher accuracy of determination of zenith and sight angles due to taking into account angular parameters characterizing the instrument errors. 1 dwg