Centering structure for tubular member and method of making...

Details Centering structure for tubular member and method of making... Centering structure for tubular member and method of making...

E - Fixed Constructions

21

B

E21B 17/10 (2006.01) E21B 43/10 (2006.01)

Patent

CA 2717813

An apparatus and method for manufacture of a unitary centralizer forming Apertures are formed in a blank to create an intermediate blank having bow spring elements within a unitary centralizer and expanding a medial portion of the bow spring elements. An expansion element is inserted into the intermediate blank. An expansive force is applied to the expansion element, thereby expanding the medial portion of the bow spring elements. Mandrels placed against the upper and lower surfaces of the expansion element receive a compressive force for transfer to the expansion element. Set screw holes are placed on the unitary centralizer for attachment.

L'invention porte sur un appareil et un procédé pour fabriquer un centreur unitaire. Des ouvertures sont formées dans une ébauche pour créer une ébauche intermédiaire ayant des éléments de ressort arqués à l'intérieur d'un centreur unitaire et étendant une partie médiale des éléments de ressort arqués. Un élément d'expansion est introduit dans l'ébauche intermédiaire. Une force d'expansion est appliquée à l'élément d'expansion, étendant ainsi la partie médiale des éléments de ressort arqués. Des mandrins placés contre les surfaces supérieure et inférieure de l'élément d'expansion reçoivent une force de compression pour un transfert à l'élément d'expansion. Des trous de vis définis sont placés sur le centreur unitaire pour une fixation.

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