M. V. Dvoynikov - Drilling Wells Department, Faculty of Oil and Gas Engineering, Saint-Petersburg Mining University, Saint-Petersburg, Russia
P. A. Kutuzov - Drilling Wells Department, Faculty of Oil and Gas Engineering, Saint-Petersburg Mining University, Saint-Petersburg, Russia

The purpose of the study is aimed to determine the prospects for the development of operational control and monitoring systems, including a system to monitor the stress-strain state of a drill string. The communication channel between sensors installed in the drill string (DS) or bottom hole assembly (BHA) and wellhead is an integral part of a potential monitoring and operational control system. This article is an overview of scientific achievements in the field of communication channels used in drilling and downhole operations. Special attention is paid to fiber-optic telemetry, which is often not included in the classification of Measurement While Drilling (MWD) systems. Two main directions for the development of monitoring systems are identified. In the short term it is proposed to apply monitoring systems based on analytical models with a combination of indirect parameter analysis, still requiring high bandwidth communication channels, hence the relevance of hybrid channels. In the long term, it is proposed to use wired communication channels with a distributed network of sensors along the drill string. This paper can be useful for researchers in the field of communication channel development, as it reviews recent scientific achievements and identifies the main unsolved problems of the channels used in oil and gas field development.

monitoring system, stress-strain state, drill string, Directional Drilling, high speed telemetry system, digital technologies