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US 4,747,201 AGranted
Boosterless perforating gun
AssigneeBaker Oil Tools, Inc.
InventorsJoseph F. Donovan, Gregg W. Stout, Phillip W. Schmuck
Life of this patent
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AssigneeBaker Oil Tools, Inc.
InventorsJoseph F. Donovan, Gregg W. Stout, Phillip W. Schmuck
Estimating the term…
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.
The method of assembling a multisection perforating gun of the type wherein each section includes threadable connections at its top and bottom ends and a plurality of vertically and angularly spaced shaped charge containers having the primer ends of such containers disposed adjacent the vertical axis of the respective section to define an axial passage through the section, and a pulling means extending through the axial passage, comprising the steps of:
The method of assembling a multi-section perforating gun for a subterranan well having a plurality of tubular carriers supporting a plurality of shaped charge containers with the primer ends of such containers disposed adjacent the axis of the tubular carrier, comprising the sequential steps of:
The method of assembling a perforating gun for a subterranean well having a tubular carrier apertured to receive a plurality of shaped charge containers in the wall thereof, comprising the steps of:
The method of assembling a multisection perforating gun for a subterranean well comprising the steps of:
Dependencies are inferred from the claim text.