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Analytical assessment of predicted operational reliability indicators for electric centrifugal pump installations based on empirical observations of their failures A methodology for the analytical assessment of predicted operational reliability indicators of equipment based on empirical observations of failures (using the example of electric centrifugal pump installations for oil production) is presented. Keywords: electric centrifugal pump installation, indicators of operational reliability, mean time between failures, statistical analysis, forecast indicators, Weibull distribution, critical service life, recovery rate, replacement rate, analytical method. EvgeniyYushin@mail.ru

The article proposes a solution to the problem of operating wells, at the bottom of which, during the production of reservoir products, fluid accumulates. It is shown that traditionally this field problem is solved by carrying out underground repairs, which creates the risk of the wells not being brought back to the initial parameters, primarily in terms of flow rate. The solution to this type of complication in the wells of the Cenomanian deposit of the Urengoy oil and gas condensate field is to transfer the wells to operation using concentric lift columns. This relatively new innovative technology allows for the removal of liquid from the bottom together with gas, thereby avoiding killing the well and its subsequent repair, as well as possible stimulating treatments to restore the necessary flow. It is shown that by calculating the dependencies and the software package it is possible to determine the critical and recommended flow rates for well operation without complications.

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Rational indicators for the development of oil and gas fields are related to the systemic maintenance of a given level of perfection of formation opening in bottomhole zones of producing or injection wells. This need arises with the colmatation of the natural collector by mechanical, asphalt and tar-paraffinic particles, leading to a decrease in productivity, acceptance of wells and the need to restore the inflow by methods of artificial action on the bottomhole formation zone. Analysis of the effectiveness of the application of various methods of stimulating the flow of reservoir products in the fields of the Timan-Pechora oil and gas province (based on field data) allowed to argue the success of using hydraulic fracturing, thermogas chemical, and shock-depressive effects on the bottomhole formation zone. The prospect of the development of technical means for impact-depressive (implosion) impact on the bottomhole formation zone favorably distinguished by simplicity, cheapness, manufacturability and accessibility is shown. The designs of implosion hydrogenerators of single and multiple pressure are analyzed, shortcomings of technical devices are identified and ways of improving mechanisms are outlined. The results of effective application of various downhole generator devices for increasing productivity and well acceptance are presented.