Method and apparatus of protecting explosives

E - Fixed Constructions – 21 – B

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E21B 43/116 (2006.01) E21B 29/02 (2006.01) E21B 43/117 (2006.01) E21B 43/118 (2006.01) F24B 1/24 (2006.01) F42B 1/02 (2006.01) F42B 3/00 (2006.01)

Patent

CA 2413531

A method and apparatus to protect explosive components (704 or 804) used in various tools, such as tools for use in wellbores, includes a component (704 or 804) with an adsorptive material (702 or 802). Example tools include perforating gun strings (110) that include shaped charges (700 or 800), detonating cords (220), and booster explosives (114). Other tools may include surface tools containing explosive components. In these tools, a build up of corrosive gases or liquids may occur, which may cause damage to the explosive components (704 or 804). As a result, the structural integrity or reliability and thermal stability may be weakened or reduced. To reduce the amount of build up of corrosive gases or liquids, an adsorptive material (702 or 802) is placed inside tools in the proximity of explosive components (704 or 804).

L'invention concerne un procédé et un appareil destinés à protéger des composants explosifs (704 ou 804) utilisés dans divers outils, tels que des outils s'utilisant dans des puits de forage, comprenant un composant (704 ou 804) doté d'un matériau d'adsorption (702 ou 802). Des outils exemplaires comprennent des trains de canons de perforation (110), notamment des charges formées (700 ou 800), des cordeaux détonants (220), et des explosifs à charge d'amorçage (114). D'autres outils peuvent renfermer des outils de surface qui contiennent des composants explosifs. Dans ces outils, un dépôt de gaz ou de liquides corrosifs peut se créer, ce qui risque d'endommager les composants explosifs (704 ou 804). Il en résulte que l'intégrité ou la fiabilité structurelle et la stabilité thermique peuvent être affaiblies ou réduites. En vue de réduire la quantité de dépôt de gaz ou de liquides corrosifs, un matériau d'adsorption (702 ou 802) est placé à l'intérieur des outils à proximité des composants explosifs (704 ou 804).

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