초록 ▼

A method and apparatus for effecting the assembly and arming a multisection perforating gun for a subterranean well. Each of the gun sections has a plurality of vertically and angularly spaced shaped charge containers disposed with the primer ends located in concentric fashion about the vertical axi

A method and apparatus for effecting the assembly and arming a multisection perforating gun for a subterranean well. Each of the gun sections has a plurality of vertically and angularly spaced shaped charge containers disposed with the primer ends located in concentric fashion about the vertical axis of the gun, thus defining an axial passage communicating with the bores of hollow nipples which respectively effect securement of one gun section to the next adjacent gun section. In one modification, a continuous primer cord is stored on a reel below the lowermost gun section and is then pulled successively upwardly through each of the additional gun sections as they are assembled. In another modification, each of the gun sections is provided with a length of fusible guide tubing interposed between the inner primer ends of all of such shaped charges and the continuous length of primer cord is fed downwardly through the axial passage defined by such guide tubing. During assembly of the gun sections, they may be successively lowered into the well so that when assembly is complete, all of the shaped charges are below the well surface before the gun is armed by the attachment of the primer cord to a booster charge.

대표청구항 ▼

A perforating gun for a subterranean well comprising: a plurality of shaped charge containers, each container having a primer containing end; carrier means for mounting said containers in vertically and angularly spaced relation; fusible tube means defining a continuous axial passage adjacent said p

A perforating gun for a subterranean well comprising: a plurality of shaped charge containers, each container having a primer containing end; carrier means for mounting said containers in vertically and angularly spaced relation; fusible tube means defining a continuous axial passage adjacent said primer ends of said shaped charge containers; a continuous length of primer cord extending through said continuous axial passage; and means for detonating one end of said primer cord, thereby melting said fusible tube means and firing said shaped charges.