ABSTRACT
In the operation practice of dangerous industrial objects, the peculiar significance has two temporal stages: service life and residual service life. A value of indicated periods has considerable economical component connected with the expenses on object maintenance.
The assigned service life is not an indicator of reliability and must be corrected in accordance with indicators of objects reliability achieved on practice.
It is expedient to receive the endurance indicators for wells by the calculation and experimentally due to the accumulation and the analysis of statistics.
It is shown that the definition of the standard service life of the casing pipes with connections “Premium class” demands the information about the value and the warrantable periods of preservation of the tightening force by the sealing unit “metal-metal” from pipes producers.
