Method and device for detonating an explosive charge
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United States of America Patent
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Jul 3, 2012
Grant Date -
Sep 3, 2009
app pub date -
Jan 3, 2007
filing date -
Jan 3, 2006
priority date (Note) -
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Abstract
A method for detonation of a plug device in a fluid environment is described, which is in contact with a body, such as an ignition pellet, and it is characterized in that a number of pressure increases are exerted against the plug device, whereby each pressure increase causes a movement of a piston (10) which is radially arranged in a casing (12), which causes the casing (12) to move a fixed distance inward in the plug device with each pressure increase, up until the displacement of the casing (12) causes the piston to be displaced into a cavity (38), and the fluid environment enters the plug device via an inlet. Also described is a plug device which is in contact with a body, such as an ignition pellet, where the plug device is arranged to detonate after a number of pressure increases that are exerted against the plug device. The plug device/ignition pellet can be applied to initiate a detonation process which leads to perforation of a pipe wall or to perforate or remove/explode plugs in oil wells or gas wells, thereby starting production from a reservoir through a pipe.
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