Field-installable rod guide

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 17/10 (2006.01)

Patent

CA 2510932

A field-installable rod guide for a rod moveable within an oilfield tubular having an interior tubular surface for driving a downhole pump to pump liquids to the surface through the oilfield tubular. The rod guide comprises a body including interfitting body members. An outer tapered surface on one body member is engaged by an inner taper-engagement surface on the other body member, to urge the body members toward a rod gripping position about the rod. The mechanism disclosed provides a particularly strong engagement with the rod, so that the rod guide may be used for either reciprocating or rotating rods. For rotating type rod guides, an outer sleeve may be included about the body.

Il s'agit d'une tige-guide à installer sur place pour tige déplaçable à l'intérieur d'un matériel tubulaire de champ pétrolier, qui comporte une surface intérieure tubulaire pour entraîner une pompe de fond de trou permettant de pomper les liquides jusqu'à la surface, au moyen du matériel tubulaire de champ pétrolier. La tige-guide comprend un corps comprenant des éléments emboîtables. Une surface extérieure tronconique sur un élément du corps est mise en prise par une surface à conicité interne sur l'autre élément du corps, pour pousser les éléments du corps en direction d'une position de préhension de tige sur celle-ci. Le mécanisme divulgué fournit une mise en prise particulièrement puissante, de sorte que la tige-guide puisse être utilisée pour faire effectuer un mouvement de va-et-vient ou de rotation à des tiges. Il est possible de faire tourner des tiges-guides rotatives en munissant le corps d'un manchon extérieur.

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