are held. The method of DEMM fatigue damages summation at a broadband loading and applicable method of stochastic loading process schematization are designed. A method of the high-level skew stresses registration and four-parametric equation of a fatigue curve for the corrosive factor registration are designed at an estimation of DEMM durability. Experiment-calculated methods of DEMM loading estimation with the help of loading indicator both DEMM loading and residual life estimation by results of studies at full-scale model with miscellaneous stored corrosion-fatigue damage are improved. Findings of investigation are approved experimentally on DEMM full-scale samples.
The all-up registration idealized and experimental researches, which one are founded on legitimacies of corrosion-fatigue damage accumulation kinetics at downhole equipment mobile members, in particular, drill columns, geophysical cables, sucker rod string, has enabled to improve computational methods of their durability and residual life. The designed method of applications and facilities are inserted in an industry.
Keywords: downhole equipment, loading schematization, corrosion-fatigue damage, durability, residual life.
29-04-2015, 00:36