DATA TRANSFER FROM WELL VIA ELECTRIC COMMUNICATION CABLE AND DEVICE TO THIS END

摘要

FIELD: oil-and-gas industry.SUBSTANCE: invention relates to logging in drilling and serves to transmission of measurement signals from the well to surface via wireless communication line. Proposed method comprises excitation of electric current in well tubing divided by dielectric inserts into top and bottom parts and registration of voltage change caused by current pulsation in tubing on the surface. Note here that wanted signal represents the voltage variation at receiver cylindrical coil terminals that makes the function of AC in pipe excited by alternating e.m.f. applied to dielectric insert. Proposed device comprises AC source connected to tubing in well divided by dielectric insert into top and bottom parts and surface cylindrical receiver coil with magnetic core composed of a hollow cylinder arranged coaxially at said tubing. Note here that several coil can be used arranged one above the other and equipped with band amplifiers their outputs being summed at voltage registrar input.EFFECT: simplified and accelerated transmission of signals from well bottom.2 cl, 1 dwg