Jan 27, 2012 16:47: Yana Dovgopol changed "Term Context" from "Summary [0005] Certain embodiments described herein are directed to a perforating assembly and a perforating safety system. The perforating assembly and perforating safety system can be disposed in a bore of a subterranean formation. [0006] In some embodiments, the perforating assembly can comprise an isolation device. The isolation device can prevent a denotation train when the perforating assembly is in a first orientation and can allow a denotation train when the perforating assembly is in a second orientation. The isolation device can automatically switch from a first configuration to a second configuration upon a change in orientation of the perforating assembly, for example much like that experienced when being conveyed from a vertical section of a well to a horizontal section of a well. [0007] In at least one embodiment, the isolation device can provide an obstruction to interrupt the detonation train when the perforating assembly is in the first orientation. [0008] In some embodiments, the isolation device can include a substantially spherical structure. The substantially spherical structure can cooperate with a sealing device to prevent the detonation train when the perforating assembly is in the first orientation. In some embodiments, the substantially spherical structure can be positioned in a second position when the perforating assembly is in the second orientation. In certain embodiments, the sealing device can be at least one of an O-ring, a gasket, or a material made from silicone. [0009] In at least one embodiment, the isolation device can include a weighted swivel structure. The weighted swivel structure can automatically rotate upon the perforating assembly being changed from the first orientation to the second orientation. In some embodiments, the weighted swivel structure can include a block that provides an obstruction to interrupt the detonation train when the perforating assembly is in the first orientation. muchas gracias!!" to "muchas gracias!! "