u043au043eu043cu043fu0435u043du0441u0438u0440u043eu0432u0430u043du043du044bu0439 device of electromagnetic log in the process of drilling small diameter

摘要

the invention belongs to the field of geophysical research laboratory, namely gps electromagnetic log.and can be used for measuring the electric characteristics of rocks in the process of drilling for oil and gas, as well as in the u0433u0435u043eu043du0430u0432u0438u0433u0430u0446u0438u0438 boren whoa.with the construction of small outer diameter, containing the replacement antenna nodes with high reliability and mechanical strength.the device consists of a metal tube inside which is located a protection casing for accommodating electronic circuits, replacement of reception and transmit antenna nodes.each antenna node implemented triangular annular u043fu0440u043eu0442u043eu0447u043au0438 in metal pipe with narrow longitudinal all in which are located u0444u0435u0440u0440u0438u0442u043eu0432u044bu0435 insertsand u0440u0430u0437u0440u0435u0437u043du043eu0439 casing with narrow longitudinal all across the board.triangle annular u043fu0440u043eu0442u043eu0447u043au0438 form antenna channel, which is available in the center of the antenna wireand on the surface of the triangular u043fu0440u043eu0442u043eu0447u0435u043a plasma plating layer of ceramics is based on mixture of aluminium oxide and titanium dioxide.at the same time, the function of the facility and 200 mm in u0446u0435u043du0442u0440u0430u0442u043eu0440u0430 antenna wires.