High density perforating gun system producing reduced debris

Details High density perforating gun system producing reduced debris High density perforating gun system producing reduced debris

E - Fixed Constructions

21

B

E21B 43/117 (2006.01) E21B 43/1185 (2006.01) F42B 1/028 (2006.01)

Patent

CA 2649728

A perforating system has a perforating module comprising a unitary body of explosive. The explosive is contained within a non-explosive casing, or liner, having formed indentations and a cover thereover. The indentations, which will transform into explosively formed penetrators (EFP's) upon detonation, have a perimeter shape that allows for improved packing density, e.g., a hexagonal perimeter, which results in relatively little "dead space" wherein no perforating penetrators are generated. In operation, the module provides a relatively dense shot pattern and substantially reduced amount of post-detonation debris that could clog the perforations and/or require remedial clean-up or repeat perforation.

L'invention concerne un système de perforation muni d'un module de perforation comportant un corps monobloc d'explosif. L'explosif est contenu dans une enveloppe non explosive, ou chemise, où sont formées des indentations et qui est coiffée d'un couvercle. Les indentations, qui se transforment en pénétrateurs formés par explosion (EFP) lors de la détonation, présentent une forme de périmètre qui permet d'obtenir une densité de tassement améliorée, par ex., un périmètre hexagonal, ce qui se traduit par un 'espace mort' relativement réduit où aucun pénétrateur de perforation n'est généré. En exploitation, ledit module donne un schéma de tir relativement dense et une quantité sensiblement réduite de débris post-détonation qui pourraient boucher les perforations et / ou nécessiter un nettoyage curatif ou un renouvellement de la perforation.

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