Novel device and methods for firing perforating guns

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 43/11 (2006.01)

Patent

CA 2599811

A perforating gun train for perforating two or more zones of interest includes two or more gun sets made up of guns, detonators, and other associated equipment. In one embodiment, the gun sets are connected with connectors that can convey activation signals between the gun sets. The firing of a gun set creates this conveyed activation signal either directly or indirectly. In one arrangement, a surface signal initiates the firing of a first gun set while subsequent firings are initiated by firing of the gun sets making up the gun train. An exemplary connector is at least temporarily filled with signal conveyance medium adapted to transmit activation signals between the gun sets. In one embodiment, the signal conveyance medium is a liquid. The liquid can be added to the connector either at the surface or while in the wellbore.

L'invention porte sur un train de pistolet de perforateur afin de perforer au moins deux zones d'intérêt, comprenant au moins deux ensembles pistolets constitués de pistolets, de détonateurs et autre équipement associé. Dans un mode de réalisation, les ensembles pistolets sont reliés par des connecteurs qui acheminent les signaux d'activation entre les ensembles pistolets. Le déclenchement d'un ensemble pistolet provoque cet acheminement de signal d'activation directement ou indirectement. Dans un autre mode de réalisation, un signal de surface provoque le déclenchement d'un ensemble pistolet alors que les déclenchements ultérieurs sont provoqués par le déclenchement des ensembles pistolets constituant le train de pistolet. Un connecteur représentatif est au moins temporairement constitué d'un milieu d'acheminement de signaux conçu pour transmettre les signaux d'activation entre les ensembles pistolets. Dans un mode de réalisation différent, le milieu de transmission de signaux est un liquide. Ce liquide peut être ajouté au connecteur à la surface ou dans le puits de forage.

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