Patent ID: 8789467
Filing Date: 2014-07-29
Classification: E21B,F42C,F42D

Abstract:
1. An explosive tool, comprising: a body structure; a detonator disposed within a first chamber within the body structure; a charge disposed within a second chamber within the body structure; a port configured to provide communication between the first chamber and the second chamber; a pressure actuated safety configured to block the communication through the port in response to a pressure below a predetermined pressure threshold and allow the communication through the port in response to a pressure at or above the predetermined pressure threshold; and a temperature actuated safety configured to block the communication through the port in response to a temperature below a predetermined temperature threshold and allow the communication through the port in response to a temperature at or above the predetermined temperature threshold, wherein at least a portion of the pressure actuated safety is positioned within a portion of the temperature actuated safety when the pressure actuated safety is configured to block communication through the port and when the temperature actuated safety is configured to block communication through the port.