Citation

Jia W, Li X, Cheng T, Luo Z, Xu J, Han X. China Saf. Sci. J. 2022; 32(3): 58-64.

Copyright

(Copyright © 2022, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2022.03.008

PMID

unavailable

Abstract

In order to ensure safe production and operation of ultra-high pressure sulfur-bearing natural gas wells, influencing factors of erosion wear rate were analyzed. Firstly, based on erosion wear theory and Fluent software, an erosion model was established by taking cage sleeve choke valves of natural gas wellheads with pressure above 70 MPa and H2S volume content of 0-2% as an example. Then, motion track and wear mechanism of solid particles in the valves were studied and compared with actual situation. The results show that when these particles are in upstream straight pipe section of the valves, erosion wear can be ignored, but it will be the worst when they are at valve chamber wall directly opposite the 180° choke hole, and be mildly severe at downstream. The wear principle of lower half arc of valve cavity is secondary erosion, while semi-arc of straight section entrance and upper half arc of throttle valves are mostly micro cutting wear. It is also found that the higher the H2S content and average flow rate are, the heavier erosion wear will be. Therefore, the flow rate of natural gas can be controlled within 331 m/s. © 2022 China Safety Science Journal. All rights reserved.

Language: zh