METHOD FOR INFORMATION TRANSMISSION VIA ELECTROMAGNETIC COMMUNICATION CHANNEL AT OPERATION OF WELL, AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2013 - IPC E21B47/12 

FIELD: oil and gas industry.

SUBSTANCE: method consists in excitation of an electric current in a metal string in a well by means of a ground-based generator connected with one contact to surface part of the metal string and with the other contact to a receiving electrode on the well surface. Commutation of a dielectric insert dividing the metal string in the well into upper and lower parts is performed. Another string of metal pipes lowered to that well is used as the receiving electrode. Therefore, an electric circuit of a metal string in the well and a receiving electrode is formed, via which direct current stabilised as to the value is transmitted from the ground-based generator. Reception of information from the well working face is performed depending on modulation of the value of stress caused by commutation of the dielectric insert. As a ground-based generator there used is a source of stabilised direct current, and as a receiving electrode there can be used a metal string of the tubing.

EFFECT: improving reliability of information transmission from the working face via an electromagnetic communication channel and enlarging the application scope.

4 cl, 1 dwg