Modular time delay for actuating wellbore devices and methods for using same

A method for controlling an energy train generated in a wellbore, comprising:

• serially aligning a plurality of modules along the path of the energy train, wherein each module comprises:
• an enclosure having a first open end and a second open end;
• a first portion of a high order detonation material positioned at the first open end;
• a second portion of the high order detonation material positioned at the second open end;
• and
• a low order detonation material interposed between the first portion and the second portion;
• energetically coupling a detonator cord to at least one of the plurality of modules using a transition detonator, wherein the transition detonator is formed at least partially of a high order detonation material;
• detonating at least one module of the plurality of modules by using a firing head;
• and
• detonating the detonator cord using at least another module of the plurality of modules.

An apparatus for controlling an energy train used to activate a wellbore tool, comprising:

• a work string;
• a first and a second perforating gun positioned along the work string;
• a housing positioned between the first and the second perforating gun;
• a plurality of separate modules slidably received into the housing, each module comprising:
• a support member having a first open end and a second open end;
• a first energetic material inside the support member, the first energetic material being configured to cause a low order detonation;
• a second energetic material in the support member, the second energetic material being configured to cause a high order detonation;
• and
• a firing head positioned external to the housing and configured to apply an energy input to at least one of the modules.