Patent ID: 8881816
Filing Date: 2014-11-11
Classification: E21B,G06F

Abstract:
1. A downhole perforation tool assembly, comprising: a first perforation gun comprising a first plurality of explosive charges and a first electrically actuated detonation initiator, wherein the first electrically actuated detonation initiator is coupled to at least one of the first plurality of explosive charges; a second perforation gun, mechanically coupled to the first perforation gun, comprising a second plurality of explosive charges, a delay element, and a second electrically actuated detonation initiator, wherein the second electrically actuated detonation initiator is coupled to at least one of the second plurality of explosive charges; and one or more electrical conductors coupled to the first and second electrically actuated detonation initiators and an electrical firing unit; wherein both the first and second electrically actuated detonation initiators are configured to actuate in response to simultaneously receiving a single electrical signal conveyed by the one or more electrical conductors to detonate the first plurality of explosive charges and the second plurality of explosive charges respectively, wherein the delay element is configured to delay the detonation of the second plurality of explosive charges for a time delay after the detonation of the first plurality of explosive charges in response to receiving the single electrical signal, and wherein the timing of the actuating of the first and the second electrically actuated detonation initiators is controlled to mitigate a shock load in the perforation tool assembly associated with an interaction between the detonations of the first and second plurality of explosives, wherein the first and second electrically actuated detonation initiators are configured to actuate in response to the same single electrical signal conveyed by the one or more electrical conductors to detonate the first plurality of explosive charges and the second plurality of explosive charges.