Gas lift mandrel

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 43/12 (2006.01) E21B 23/03 (2006.01)

Patent

CA 2496737

A side-pocket gas lift mandrel having tapered end caps threaded onto the ends of the mandrel with metal-to-metal sealing threads. The thickness of each made up thread set is the same as the thickness of the small end of each end cap, resulting in a mandrel having the same outside diameter as if the end caps were welded on, without sacrificing any inside diameter in the small ends of the end caps, compared to a welded mandrel.

L'invention concerne un mandrin d'extraction au gaz à chambre latérale pourvu de coiffes d'extrémité coniques filetées sur les extrémités du mandrin avec des filets de scellement métal à métal. L'épaisseur de chaque série de filets est la même que l'épaisseur de la petite extrémité de chaque coiffe d'extrémité, ce qui débouche sur un mandrin doté d'un diamètre externe identique que si les coiffes d'extrémité étaient soudés, sans affecter un diamètre interne quelconque dans les petites extrémités des coiffes d'extrémité, en comparaison à un mandrin soudé.

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