METHOD OF REMOTE CONTROL OF PIPELINE CONDITION IN PERMAFROST ZONE Russian patent published in 2005 - IPC

FIELD: oil and gas industry.

SUBSTANCE: method comprises radiolocation interferometric survey from the repeatable orbits of satellites when the distance between the trajectories of the satellite (interferometric base) is no more than 500 m. For each element of the radiolocation image obtained at different moments of time the phase difference of signals is determined which contains information on the movement of the reflecting surfaces and relief. The topographic phase difference caused by the relief is then calculated from the model of relief and survey geometry. The phase difference indicates the dynamic phase difference during the interval between the surveys for the given pair of phase differences. The vertical component of movements of the reflecting surface is then calculated during the time interval between the surveys of the pipeline on the ground surface from the formula proposed.

EFFECT: enhanced reliability.