Well bore perforating apparatus
AssigneeSchlumberger Technology Corporation
InventorMichel J. Bosse-Platiere
Life of this patent
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Abstract
In the representative embodiment of the present invention disclosed herein, a plurality of generally-cylindrical modular bodies are tandemly assembled within a typical end-loaded perforating carrier. A generally-longitudinal passage containing a detonating explosive is arranged in each of the modular bodies so that, when the bodies are tandemly assembled in a carrier, these passages will collectively define a continuous passage through which detonation-inducing forces can be transmitted. Shaped charges are mounted in at least some of the modular bodies and positioned to be fired upon detonation of the explosive in the continuous passage.
Claims27
Perforating apparatus adapted for operation in a well bore and comprising:
- a tubular carrier having an end opening providing access to the interior bore of said carrier;
- a plurality of bodies adapted to be successively introduced through said end opening and tandemly assembled within said interior bore with their opposite ends respectively abutting one another;
- charge-detonating means including an elongated passage entirely through each body, each passage of one body communicating with the passage of the abutting body for collectively defining a generally-longitudinal intercommunicating passage through said tandemly assembled bodies, and a detonating explosive cooperatively arranged within each of said body passages and closed entirely in each body by closure means on each end of the body, said detonation-inducing forces being communicated solely via said collectively defined intercommunicating passage for producing detonation-inducing forces therein at predetermined locations within selected ones of said tandemly-assembled bodies;
- means defining a laterally-directed charge-receiving opening on each of said selected bodies;
- and
- perforating means within each of said charge-receiving openings including a shaped explosive charge including a detonation-initiating base portion cooperatively arranged within detonating proximity of said predetermined locations in said body passages.
Perforating apparatus adapted for operation in a well bore and comprising:
- a tubular carrier having an end opening providing access to the internal bore of said carrier;
- and
- perforating means including a plurality of shaped explosive charges respectively adapted to be fired in response to a detonation-initiating explosive force acting on a base portion thereof, a plurality of generally-cylindrical modular bodies tandemly assembled within said carrier bore, each of said bodies having an explosive-containing passage entirely contained therein and having a detonating explosive in said passage closed at each end of said passage by closure means thereby creating a stand-alone body for communicating an explosive force from one end of the body to the other end of the body, its ends respectively terminating in a predetermined corresponding location on the opposite ends of each of said bodies so as to respectively position said body passage ends within detonating proximity of one another when said modular bodies are tandemly assembled within said carrier and thereby define an intercommunicating passage through said tandemly-assembled bodies, at least two of said bodies having a laterally-opening charge-receiving cavity arranged thereon and adapted for respectively retaining one of said shaped charges and directinng it in a given direction along a selected perforating axis and positioning its said base portion within detonating proximity of said body passage, wherein the detonation of the explosive in a first modular body is transmitted to all other tandemly assembled bodies via said intercommunicating passage thereby detonating any of said shaped charges retained in any of said bodies.
Perforating apparatus adapted for operation in a well bore and comprising:
- a generally-cylindrical body having an outwardly-facing charge-receiving cavity in one side thereof and an elongated passage contained entirely within said generally-cylindrical body extending between the end walls of said generally-cylindrical body with an intermediate portion thereof passing between said cavity and the diametrically-opposite side of said generally-cylindrical body;
- a shaped explosive charge cooperatively arranged within said charge-receiving cavity and including a detonation-initiating base portion positioned within detonating proximity of said intermediate passage portion;
- a detonating explosive confined within said elongated passage;
- and
- means on said body closing the opposite ends of said passage.
Dependencies are inferred from the claim text.