Open AccessAnalyzing Causes of Damage to the Plunger Stem and Cylinder of a Sucker Rod Pump
Author(s) -
Darya Strekalovskaya,
А. Д. Давыдов,
А. А. Альхименко,
Daniil Lyashenko
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/986/1/012038
Subject(s) - plunger , sucker rod , thread (computing) , materials science , cable gland , service life , cracking , adapter (computing) , mechanical engineering , composite material , engineering , electrical engineering
This paper presents the results of analyzing the reasons for damage to the plunger stem and cylinder of sucker rod pumps, which were operated in an environment with hydrogen sulfide. The chemical composition, mechanical properties, and hardness of the products were studied in order to assess how the material of the parts conforms to the technical documentation. Likewise, the reasons for damage were analyzed using an optical electron microscope. It was established that damage to the plunger stem happened along the first thread of the threaded connection of the rod inside the body of the adapter, while destruction to the cylinder was observed in the area of the threaded connection to the body of the pump’s suction valve. Results showed that the main reason for damage was the combination of a corrosive H2S environment and mechanical stress, which led to sulfide corroded cracking under stress. Suggestions were put forward about extending the service period of the SRP parts and reducing the likelihood of their destruction.