The article presents a technology for building a water-shut screen in an oil well. The technology is based on drilling of radial channels within the water-encroached formation and following injection of water insulation composition in these channels. The proposed technology provides a durable screen of increased diameter and width. It contributes to a longer period of low watercut production in an oil well.

Currently, metrology is an important element of any industry. Under these conditions, the accuracy of testing and calibration of measuring devices becomes critical. Due to the high accuracy of modern measuring instruments, human factor can play a significant negative role in the calibration process. Therefore, the use of modern tools, such as a data logger, can significantly improve the quality of the process, reducing staff functions to process control.