| 摘要 |
An explosive diode transfer system is interconnected between adjacent perforating guns of a modular perforating apparatus. The explosive diode transfer system includes a downwardly directed shaped charge, a booster, and a multi-density barrier interposed between the shaped charge and the booster. The multi-density barrier includes a first metal layer and a second metal layer spaced from the first metal layer thereby defining a sealed air-space between the first and second metal layers. The first metal layer, air space, second metal layer combination represents a plurality of different density barriers or layers which are collectively designed to prevent a first detonation wave, propagating from the booster to the shaped charge, from propagating therethrough, but nevertheless to allow a jet, propagating from the shaped charge to the booster, to propagate therethrough. The multi-density character of the barrier and the air space reflect and therefore completely attenuate the first detonation wave as it propagates from the booster to the shaped charge, but does not significantly attenuate the jet propagating from the shaped charge to the booster. Therefore, the explosive diode transfer system functions like a diode, allowing propagation in one direction, but not allowing propagation in the opposite direction. Consequently, the multi-density barrier of the explosive diode transfer system prevents a back fired detonation wave originating from a lower oriented perforating gun from detonating a higher oriented perforating gun in the modular perforating apparatus.
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