초록 ▼

A perforating gun has a charge carrier assembly housed therein comprised of a plurality of charge holders connected together in tandem. Shaped charges are supported within each of the charge holders, such that the corresponding charges of each holder are circumferentially and vertically spaced apart

A perforating gun has a charge carrier assembly housed therein comprised of a plurality of charge holders connected together in tandem. Shaped charges are supported within each of the charge holders, such that the corresponding charges of each holder are circumferentially and vertically spaced apart from one another to forn a predetermined pattern. The individual charge holders describe a polyhedron whose bases or ends describe equal polygons, and whose lateral faces are rectangular and include a centrally located aperture which is adapted to receive a shaped charge in supported relationship therewithin. Each shaped charge is provided with a boss at the forward end thereof which abuttingly engages a lateral face of the polyhedron, and each corner or lateral edge formed between adjacent lateral faces of the charge holders have tabs extended in opposite directions therefrom which are arranged to engage the outmost face of the shaped charge, so that the shaped charge is uniquely captured in mounted relationship within the charge holder only by the action of the action of adjacent charge holders.

대표청구항 ▼

In a perforating gun for perforating a casing located downhole in a cased borehole, said gun having a housing, shaped charges in said housing spaced from one another and connected to a detonation means, each shaped charge having a flange means on one end of a body portion, the other end of the body

In a perforating gun for perforating a casing located downhole in a cased borehole, said gun having a housing, shaped charges in said housing spaced from one another and connected to a detonation means, each shaped charge having a flange means on one end of a body portion, the other end of the body portion being the detonator end, the combination with said housing, charges, and detonation means of a charge carrier assembly; said charge carrier assembly comprises a plurality of charge holders connected together along the longitudinal axis of the gun; each charge holder describes a polyhedron, each polyhedron being described by relatively thin wall surfaces joined together by lateral edges which extend parallel to the axial centerline of said gun and provide opposed fasteners for the shaped charge; each said charge holder has a plurality of lateral faces, one said face is apertured to telescopingly receive a shaped charge therewithin, adjacent charge holders have means for orienting the shaped charges of alternate charge holders in different radial directions; and means for capturing a shaped charge within an aperture of a charge holder whereby the body portion of each said shaped charge is received within said aperture of said charge holder with the flange means of said shaped charge abutting a lateral of said charge holder, and having the opposed fasteners extending towards an opposed fastener located on an alternate charge holder to capture the flange between two opposed fasteners and the lateral face of the charge holder so that the inner detonator end of the charge is positioned near the geometrical center of the charge holder.