Rod guide with enhanced erodable volume

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 17/00 (2006.01) B29D 99/00 (2010.01) B29C 45/14 (2006.01) B29D 31/00 (2006.01)

Patent

CA 2145908

A rod guide molded in intimate contact with a sucker rod increases the amount of rod guide material available for wear. Adequate bypass area is provided so as not to impede the efficient movement of the rod and guide in tubing, yet more material for wear significantly lengthens the useful life of the rod guide. In a preferred embodiment, the rod comprises two guide elements, each with two lobes or vanes. The vanes of the two elements are opposed by ninety degrees for smooth operation and stability of the guide. Each lobe has an exterior contact surface with a circular radius of curvature that matches that of the tubing into which the guide is to be inserted.

Le moulage d'un guide pour tige de pompage en contact étroit avec celle-ci a pour effet d'accroître la quantité de matière du guide pouvant être sacrifiée à l'usure. Un espace de dégagement suffisant est prévu afin de ne pas entraver le mouvement efficace de la tige et du guide à l'intérieur du tubage, mais la plus grande quantité de matière pouvant être sacrifiée à l'usure accroît substantiellement la durée de vie utile du guide. Dans une version préférée de l'invention, la tige comporte deux éléments de guidage, chacun comportant deux lobes ou ailettes. Les ailettes des deux éléments de guidage sont disposées en opposition selon un angle de quatre-vingt dix degrés afin d'assurer le douceur du fonctionnement ainsi que la stabilité du guide. Chaque lobe possède une surface de contact extérieure dont le rayon de courbure correspond à celui du tubage à l'intérieur duquel le guide est inséré.

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