| 摘要 |
A shaped charge includes a main body of explosive and a primer adapted to detonate said main body of explosive. In accordance with the present invention, the main body of explosive now includes an explosive composition known as sym- triaminotrinitrobenzene (TATB) and, since TATB is not sensitive enough to be a primer, the primer mu st consist of an explosive composition which is more sensitive than TATB. It has been discovered that, when the main body of explosive in a shaped charge is modified to include the explosive composition known as TATB and when the primer includes an explosiv e other than TATB, such as HNS or NONA or PYX or HMX, or a mixture of HNS or NONA or DODECA or PYX or HMX and TATB and when the shaped charge is detonated, t he detonated charge will produce a jet that is longer in length than the jet associated with prior art shaped charges which did not have a main body of explosive that included TATB. As a result, when the longer jet is produced from the shaped charge of the present invention, that has been modified to include a main body of explosiv e comprising TATB and a primer which is more sensitive than said TATB, the longer jet will produce a longer perforation in a formation penetrated by a wellbore an d, as a result, an increased quantity of wellbore fluid will be produced from the perforated formation. A detonating cord could also include the TATB explosive.
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