E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/11 (2006.01) E21B 43/119 (2006.01)
Patent
CA 2612500
An explosives safety system includes an explosive component, a blocking member displaceable to selectively permit and prevent detonation of the explosive component, and a thermal actuator responsive to temperature change and configured to displace the member in response to the temperature change. Another explosives safety system includes a thermal actuator with a material having a volume variable in response to the temperature change, and detonation of the explosive component being selectively permitted and prevented by the actuator when the material volume changes. A method of preventing undesired detonation of an explosive component includes the steps of: providing a material having a volume variable in response to a change in a temperature; positioning the material and the explosive component in a well, thereby increasing the material temperature; increasing the material volume in response to the increasing temperature; and permitting detonation of the explosive component in response to the increasing volume.
Burleson John D.
George Flint R.
Grattan Antony F.
Hales John H.
Harrison Ryan A.
Halliburton Energy Services Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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