The absence of a reliable control system for the technical condition of wells leads, as a rule, to serious violations of the ecological balance of the environment, uncontrolled losses of raw materials and changes in its parameters, as well as to large material costs associated with the liquidation of accidents, uncertainty with the permissible terms of reliable operation of wells. To detect the fact and places of leakage of a well, a group of methods of borehole geophysical research, including various logging methods and methods, is widely used. However, these technologies allow either only to identify the expected leak interval with a length of several meters to several tens of meters, or provide detailed information about some individual defects.

For proper planning of major well repairs, both a detailed and accurate description of defects and a reasonable conclusion about the possibility of continuing the operation of the well in specific geological and technical conditions in the presence of a defect in the columns or cement ring are necessary.

Assessment of the well condition using the telemetry method.

Figure 1 shows the conditions of the internal surfaces of pumping and compressor pipes (tubing) of wells located in the Absheron Peninsula.

For this purpose, a QVIQ -56-7000 model well inspection unit developed by Modern Engineering Development Ltd was used.

In the first case, the corrosion destruction of the lock joint is clearly visible, leading to depressurization in the well. When the standard field methods used to determine the location of the depressurization site did not yield results, we applied the telemetry method and established the damage site.

                                  Figure 1: Fragments of the well (connection points of the tubing).

Based on the results obtained, it was decided to completely replace the pipes in this section

                    Figure 2: Fragments of the inspection of an oil well at a depth of 841 and 943 meters.

Thus, it can be concluded that the QVIQ -56-7000 model well inspection system is a reliable technical means for using the assessment of the internal condition of borehole pipes.