Double-effect perforating bullet containing active material layer, and active material

Abstract

The invention discloses a double-effect perforating bullet containing an active material layer, and an active material. The double-effect perforating bullet comprises a common perforating bullet and the active material layer, wherein the common perforating bullet comprises a cartridge shape cover, a cartridge case and a high explosive layer; the active material layer is arranged between the cartridge case and the high explosive layer; the active material is prepared from the following materials: aluminum powder, nickel powder, magnesium powder, potassium perchlorate, ammonium perchlorate, potassium nitrate, ferric oxide, copper oxide, polytetrafluoroethylene, fluorine rubber, and the like. The double-effect perforating bullet is reasonable in structural design and safe and reliable in manufacturing technology, and has double effects of perforating and removing a perforation compaction band and fracture forming in a pore path.

Description

technical field [0001] The invention belongs to the field of well and mine equipment or materials, in particular to a double-effect perforating charge containing an active material layer and an active material. Background technique [0002] Conventional perforating charges are composed of three parts: explosives, liner and casing. Among them, the explosive is the energy source for the work of the perforating bullet and the detonation perforation. In the perforation, the high-energy explosive is first detonated by the detonation index. After the detonation, the high-energy explosive spreads around the detonation point to form a spherical surface, and meets the conical metal liner to form a high-speed, high-temperature metal jet in the axial direction to produce armor-piercing and perforating effects on metals and rocks. , it will squeeze all the substances in the trajectory to form a hole or channel. When the high-speed and high-temperature metal jet pierces the hole, its sh...

AI Technical Summary

Problems solved by technology

In the perforation, the high-energy explosive is first detonated by the detonation index. After the detonation, the high-energy explosive spreads around the detonation point to form a spherical surface, and meets the conical metal liner to form a high-speed, high-temperature metal jet in the axial direction to produce armor-piercing and perforating effects on metals and rocks. , it will squeeze all the substances in the trajectory to form a hole or channel. When the high-speed and high-temperature metal jet pierces the hole, its shock wave will rapidly spread outwards to generate a high pressure load and form a pressure layer with a thickness of 6.4 to 12.7mm around the channel. Real zone, the permeability of this compacted zone is only about 30% of the original undamaged formation, and the porosity is 80% of the original formation, which affects the original gas production channel and has the problem of secondary compaction damage by perforation

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