The Reliability Assessment of Functioning of Autonomous Power System of Drilling Rigs

The analysis of the drilling rigs, being operated nowadays allowing making the drilling at depths about 25008000 meters, shows that for the drilling of oil and gas wells on the territory of the Russian Federation, the rigs with the direct current controlled-velocity electric drive, in the majority, are used. Thus, rigs with drilling depth more than 4500 meters and offshore drilling rigs belong to consumers of the first category. Application of direct current electric drive like that of induction drive as an alternative solution for them is caused by necessity to ensure more advanced adjustment while controlling the drilling unit's main mechanisms. It is obvious that such condition of a problem of reliability ensuring of an electro-technical complex functioning of drilling rigs demands the carrying out of scientific researches for the purpose of profitability increase of drilling rigs and the functioning reliability of their systems.