Journal issues: 1/2013
1 January, 2013
Installation of centralizer in near plunger zone of pump with the influence of axial force arising in the rod string in down stroke
This article considers the statistics of string rod breaks on the structural elements of a rod string, pump size and profile of the well in OJSC "Surgutneftegas" NGDU "Nizhnesortymskneft". It shows the discharge stroke impact on the conditions of the rod sag in near plunger zone. The authors calculated the centralizer installation location using Maple 15 based on the maximum string deflection in the considered area for various pump sizes, rod string and the wellbore angle in the area. Dependence diagrams are drawn with subsequent analysis for each considered case. This article gives recommendations for considering the additional forces in the discharge stroke to calculate the installation site of the centralizer in near plunger zone.
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axial force; centralizer; discharge stroke; near plunger zone; rod pump; rod string; колонна штанг; осевая сила; приплунжерная зона; такт нагнетания; центратор; штанговый насос References to this article (GOST) M.A. Kochekov, R.N. Yakubov. Installation of centralizer in near plunger zone of pump with the influence of axial force arising in the rod string in down stroke // Electronic scientific journal "Oil and Gas Business". 2013. №1. P.205-214. URL: http://ogbus.ru/authors/KochekovMA/KochekovMA_1.pdf