Sealing assembly for rotary oil pumps and method of using same

Details Sealing assembly for rotary oil pumps and method of using same Sealing assembly for rotary oil pumps and method of using same

F - Mech Eng,Light,Heat,Weapons

16

J

F16J 15/34 (2006.01) E21B 33/08 (2006.01) E21B 43/12 (2006.01) F04B 47/06 (2006.01) F04B 53/00 (2006.01)

Patent

CA 2095937

An assembly for restraining oil leakage in a rotary oil well pump includes a stationary member and a rotary member. The rotary member is secured to the rotating rod and is sealed against the rod by conventional compressed packing. The rotary member has a cylindrical portion rotating within a cylindrical recess of the stationary member, with an annular recess defined between them. The recess contains two or more annular seal cartridges stacked one after the other in the annular space. The cartridges are designed to individually resist the ingress of the pressurized oil, so that leakage takes place sequentially past the individual cartridges. Leak passages are provided in the stationary member and are in communication with each of the cartridges respectively. When oil appears at anygiven leak passage, this signifies that the oil has bridged the defences of thatcartridge and any cartridge or cartridges which are upstream of the leaking cartridge.

Dispositif permettant d'empêcher les fuites de pétrole dans une pompe rotative de puits de pétrole comprenant un élément fixe et un élément rotatif. L'élément rotatif est fixé à la tige rotative et est scellé contre la tige par une garniture classique comprimée. L'élément rotatif possède une partie cylindrique qui tourne à l'intérieur d'un évidement cylindrique de l'élément fixe, et un évidement annulaire se trouve défini entre eux. L'évidement renferme deux ou plusieurs cartouches d'étanchéité empilées l'une sur l'autre dans l'espace annulaire. Les cartouches sont conçues pour résister séparément à l'entrée du pétrole sous pression, de sorte que la fuite se produit de manière séquentielle au-delà des cartouches individuelles. Des passages pour les fuites sont ménagés dans l'élément fixe et communiquent avec chaque cartouche, respectivement. Lorsque du pétrole apparaît dans un passage pour les fuites, cela signifie que le pétrole a contourné les défenses de cette cartouche et celles de la cartouche ou des autres cartouches situées en amont de la cartouche qui présente une fuite.

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