METHOD AND DEVICE FOR EXPLOSIVE MATERIAL PROTECTION Russian patent published in 2005 - IPC

FIELD: explosive material protection, particularly for that used in wells.

SUBSTANCE: device has perforator or shaped charge case, explosive material in case and module filled with absorbing material and arranged near explosive material to absorb aggressive fluid. Explosive material is arranged outside the module. Gun perforator used in well hole has explosive component, absorbing material arranged near the explosive component and adapted to absorb aggressive fluid and explosive material protection and module comprising absorbing material. Explosive component is arranged outside the module. Method of explosive material protection involves arranging absorbing material, which is effective at 140°F in high-temperature environment in the vicinity to explosive material to absorb explosive material and to protect above explosive material, wherein the absorbing material is placed in perforator or shaped charge case; driving assembly including charge material, case and absorbing material, in well hole, wherein the explosive material is located outside the case. Downhole tool has member to perform operations inside well, explosive material and at least one module including absorbing material to absorb aggressive fluid. Each module has container filled with absorbing material. Each container comprises member selected from group including metal sieve, metal net or porous plastic material. Device used in well hole has protective material adapted to cooperate with aggressive fluid to reduce hazardous effect thereof and container at least partly formed of protective material, which may melt inside well hole to release the protective material.

EFFECT: reduced explosive decomposition.

35 cl, 10 dwg