Surface safe explosive tool

摘要

An explosive tool comprises a body structure, a charge, a detonator to ignite the charge via propagation of thermal energy, a pressure actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to a surface pressure and to not prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to at least a predefined pressure threshold, and a temperature actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to a surface temperature and to not prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to at least a predefined temperature threshold. The charge, the detonator, the pressure actuated safety, and the temperature actuated safety are contained within the body structure.

主权项

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.