FIELD: oil and gas well drilling and operation, particularly to transmit information from well to day surface through wireless communication channel.
SUBSTANCE: emitter is made as pipe with conical connection thread and sub adapted to receive centrator. The centrator is restricted from axial and radial displacement. Coupler to establish communication with downhole tool is arranged in the centrator. Transmitting coil is wound around outer pipe surface. One coil lead is connected with coupler, another lead is connected to pipe body. The pipe may have protective thickening in pipe center so that the coil is arranged between the protective thickening and sub. Isolation layer is connected to the pipe. Coil may be also provided with protective coating or shell.
EFFECT: possibility to transmit signals through shielding formations having high permeability and provision of downhole tool workability in casing pipe.
5 cl, 1 dwg
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