Explosive fracturing devices

Explosive fracturing devices used to fracture rock formations at the base or shaft walls of oil wells to increase the flow of gas or oil. These devices may use shaped charges or oil well cartridges syn, industrial ammunition) which propel steel or hardened projectiles. 

Fracturing devices, explosive, without detonators for oil wells 0099... 

Fracturing Devices, Explosive for oil wells, without detonator Articles consisting of a charge of detonating explosive contained in a casing without means of initiation. They are used to fracture the rock around a drill shaft to assist the flow of crude oil from the rock. UN App. B, ICAO A2, US 173.59... 

Fracturing devices, explosive, for oil wells, without detonators, see Explosive Articles, p.69... 

Any process heat plant design implies piping through the containment to connect the reactor vessel with the chemical plant. The fracture of a pipe could result in the accumulation of a flammable gas mixture in the containment. Precautions must be taken to minimize the risk of a fire or gas explosion such as avoidance of explosive gas ingress, proper detection devices, inerting, sufficient safety distances, appropriate layout of secondary coolant boundary, explosion-proofed wall, plant isolation valve. For the PNP-500, the use of two concentric pipes for the process gas carrying lines were recommended. Alternatives are concrete channels around the gas lines or inerting of the containment [10]. 

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