Degradable material time delay system and method
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United States of America Patent
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Sep 12, 2017
Grant Date -
Aug 31, 2017
app pub date -
Apr 5, 2016
filing date -
Feb 25, 2016
priority date (Note) -
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Abstract
A detonating restriction plug element and method in a wellbore casing. The element includes a hollow passage in the restriction plug element that receives a detonating assembly coupled to a mechanical restraining element, and a space for containing a reactive fluid. The mechanical restraining element undergoes a change in shape for a pre-determined time delay due to a chemical reaction when the reactive fluid in the space such as wellbore fluids comes in contact with the restraining element. A firing pin in the detonating assembly is released when the restraining elements changes shape and releases the restraint on the firing pin. The firing pin contacts a detonator in the detonating assembly and causes a detonating event such that the restriction plug element fragments.
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