METHODS AND APPARATUSES FOR ELECTRONIC TIME DELAY AND SYSTEMS INCLUDING SAME

摘要

Electronic time delay apparatuses and methods of use are disclosed. An ex plosive or propellant system, which may be configured as a well perforating system includes an electronic time delay assembly comprising an input subass embly, an electronic time delay circuit, and an output subassembly. The inpu t subassembly is activated by an external stimulus, wherein an element is di splaced to activate an electronic time delay circuit. The electronic time de lay circuit comprises a time delay device coupled with a voltage firing circ uit. The electronic time delay circuit counts a time delay, and, upon comple tion, raises a voltage until a threshold firing voltage is exceeded. Upon ex ceeding the threshold firing voltage, a voltage trigger switch will break do wn to transfer energy to an electric initiator to initiate an explosive boos ter within the output subassembly. The explosive booster provides the detona tion output to initiate the next element explosive or propellant element, su ch as an array of shaped charges in the well perforating system.