摘要:
A detonating device includes a high explosive portion comprising high explosive; a low explosive portion comprising low explosive; and a transition portion between the high explosive portion and the low explosive portion, wherein the transition portion comprises a mixture of high explosive and low explosive.
摘要:
A perforating charge for use in a wellbore includes an explosive and a liner to be collapsed by detonation of the explosive. The liner includes at least a first liner portion and a second liner portion which have different cohesiveness.
摘要:
A perforating charge for use in a wellbore includes an explosive and a liner to be collapsed by detonation of the explosive. The liner includes at least a first liner portion and a second liner portion which have different cohesiveness.
摘要:
A downhole device having an explosive component includes a high temperature stable explosive having thermal stability greater than 200° C., wherein the explosives having a compound of formula (I) or (II):
摘要:
A tool for use in a wellbore has an activation assembly, which has a support structure and a reactive layer on the support structure. The reactive layer is formed of a pyrotechnic material. The activation assembly also includes an electrically conductive protective layer covering the reactive layer to protect the reactive layer from electrical discharge. The tool further includes a component to be activated by the activation assembly.
摘要:
A propellant assembly for fracturing a formation around a well includes a propellant and a detonating cord wrapped around the propellant, the detonating cord to ignite the propellant upon detonation of the detonating cord. Alternatively, the propellant can include a substantially central axial bore, with the propellant having a plurality of axial slots extending radially outwardly from the axial bore toward the outer surface of the propellant. A detonating cord is arranged within the axial bore of the propellant.
摘要:
A method for perforating a wellbore comprises placing a perforating device in a cased wellbore that passes through a subterranean formation. The perforating device comprises at least one explosive perforating charge that can be detonated in order to perforate the casing and allow the formation fluids to enter the wellbore. A perforating fluid is placed in the wellbore between the perforating device and the casing. The ratio of the critical temperature of the perforating fluid in ° K and the temperature of the subterranean formation adjacent to the casing in ° K is between about 1.0-1.3. When the at least one explosive charge in the perforating device is detonated, at least one perforation is formed in the casing, and at least a portion of the perforating fluid is forced into the subterranean formation.
摘要:
An explosive composition can be produced by dissolving RDX in a volume of a first solvent to form a first solution, and adding a second solvent to the first solution. The second solvent is miscible with the first solvent, but RDX is soluble in the second solvent to an extent no greater than 1 g RDX/100 g of the second solvent. Precipitated RDX crystals can be recovered. The RDX crystals can have a crystal density of less than 1.80 g/cm3.
摘要翻译:可以通过将RDX溶解在一定体积的第一溶剂中以形成第一溶液并向第一溶液中加入第二溶剂来制备爆炸性组合物。 第二溶剂与第一溶剂混溶,但RDX在第二溶剂中可溶于不大于1g RDX / 100g第二溶剂的程度。 沉淀的RDX晶体可以回收。 RDX晶体的晶体密度可以小于1.80g / cm 3。
摘要:
The present invention provides an anti-hijacking system. In one embodiment, the anti-hijacking system is used in an airplane to provide forceful contact to disarm, disable, immobilize or otherwise incapacitate a hostile intruder who has entered the cockpit. The anti-hijacking system includes one or more inflation devices, such as deployable air bags.