The ways of improvement of operational reliability and extension of service life of threaded joints in oil-country tubes

Authors: Ye.V. Proskurkin (Osada State Research Tube Institute, Ukraine, Dnepropetrovsk), I.V. Petrov, A.Yu. Zhuravlev (SPO Neotsink JSC, RF, Lyubertsy), M.P. Polikarpov (Gubkin Russian State University of Oil and Gas, RF, Moscow), V.I. Bolshakov, T.A. Dergach (Prydniprovs'ka State Academy of Civil Engineering and Architecture, Ukraine, Dnepropetrovsk)

Key words: tubing, tubing couplings, threaded joint, diffusion zinc coating, corrosion resistance, International Standard.

Comprehensive studies and in-field tests established that one of promising ways of protection of tubes and equipment for oil and gas production is application of thermochemical diffusion zinc coating. High field-performance data of diffusion zinc coated tubing and their threaded joins and prospects of their use in difficult conditions of oil and gas production were demonstrated. A new standard for diffusion zinc coatings is developed by International Standard Organization with participation of Ukraine and Russia. It is expected to be in force in 2015.
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