Molded composite mandrel for a downhole zonal isolation tool

Details Molded composite mandrel for a downhole zonal isolation tool Molded composite mandrel for a downhole zonal isolation tool

E - Fixed Constructions

21

B

E21B 33/12 (2006.01) B29C 70/30 (2006.01) B32B 1/08 (2006.01) B32B 27/04 (2006.01) E21B 33/134 (2006.01)

Patent

CA 2593356

A composite mandrel includes a filament-wound composite tube, and composite material molded over the filament-wound composite tube. For example, the composite material includes chopped fibers and a matrix of thermoset resin. The chopped fibers are arranged in layers upon the filament-wound composite tube, and the chopped fibers in each of the layers are randomly oriented along first and second orthogonal directions in each of the layers. The composite material includes at least one sheet of the composite material wound over the filament-wound tube, and at least one strip of the composite material wound over the sheet of the composite material and forming a head on the composite mandrel. An internal cavity of the filament-wound composite tube may provide a lumen for the composite mandrel. The internal cavity may be threaded to receive a removable bridge plug.

Mandrin composite comprenant un tube composite filamentaire et un matériau composite moulé sur le tube composite filamentaire. Le matériau composite comprend par exemple des fibres coupées et une matrice en résine thermodurcie. Les fibres coupées sont disposées en couches sur le tube composite filamentaire et les fibres de chaque couche sont orientées au hasard dans l'une ou l'autre de deux directions orthogonales dans chacune des couches. Le matériau composite comprend au moins une feuille de matériau composite enroulée autour du tube composite filamentaire et au moins une bande de matériau composite enroulée autour de la feuille de matériau composite pour former une tête sur le mandrin composite. Une cavité interne du tube composite filamentaire peut servir de lumière pour le mandrin composite. La cavité interne peut être filetée pour recevoir un bouchon amovible.

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