Method for the enhancement of dynamic underbalanced systems...

Details Method for the enhancement of dynamic underbalanced systems... Method for the enhancement of dynamic underbalanced systems...

E - Fixed Constructions

21

B

E21B 43/263 (2006.01) E21B 43/116 (2006.01)

Patent

CA 2745389

By using reactive shaped charges, a dynamic underbalance effect associated with detonation of a perforating system is enhanced without compromising shot density. Fewer shaped charges can be loaded to achieve the same or better effective shot density as a gun fully loaded with conventional shaped charges, thereby increasing the free volume within the gun while creating debris-free tunnels with fractured tips and substantially eliminating the crushed zone surrounding each perforated tunnel. Further, the strength and grade of gun steel required to construct the gun can be reduced without compromising the amount the gun swells following detonation.

Selon l'invention, à l'aide de charges mises en forme réactives, un effet de sous-équilibre dynamique associé à une détonation d'un système de perforation est amélioré sans compromettre une densité de tir. Moins de charges mises en forme peuvent être chargées pour obtenir la même densité de tir efficace ou une meilleure densité de tir efficace sous la forme d'un canon entièrement chargé avec des charges mises en forme classiques, augmentant ainsi le volume libre à l'intérieur du canon tout en créant des tunnels sans débris avec des embouts fracturés et en éliminant sensiblement la zone enfoncée entourant chaque tunnel perforé. En outre, l'intensité et la qualité de l'acier de canon requises pour construire le canon peuvent être réduites sans compromettre la quantité de gonflement du canon après détonation.

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