Pressure inducing charge
AssigneeSchlumberger Technology Corporation
InventorsHongfa Huang, Brenden M. Grove, Lang Zhan
Life of this patent
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Abstract
A charge assembly for incorporation into a downhole tool to induce pressure at an interior of the tool during a downhole application. The assembly includes a reactive powder metals that is particularly configured of a reaction rate slower than that of a high energy explosive directed at the application. Thus, upon triggering of the explosive and downhole application in a high pressure well environment, reaction of the powder metals may serve to substantially reduce any pressure differential at the tool. As such, shock related damage due to sudden introduction of pressure differential wave to the tool may be minimized.
Claims21
A charge assembly of a downhole tool for deployment in a well, the assembly comprising:
- a carrier housing defining an in-gun void space therein;
- and
- a shape charge accommodated by said carrier housing, said charge comprising a reactive metal powder for elevating an in-gun pressure in the void space during an application in the well by the tool.
An in-gun pressure inducing shaped charge for incorporation into a perforating gun assembly for a perforating application at a target location in a well, the charge comprising:
- a charge case;
- a retained material within said case;
- and
- a liner over said material to form a perforating jet, one of said case, said material and said liner comprising a reactive metal powder for inducing in-gun pressure in a void space of the assembly during the application.
A method of performing an application at a target location in a well, the method comprising:
- deploying an application tool to the target location, the location of a given pressure;
- triggering the application, said triggering comprising exposing a void space of the tool to the given pressure;
- and
- increasing a pressure in the void space in conjunction with said triggering, the void space of a pressure below the given pressure in advance of said increasing.
The method of claim 21 wherein said triggering further comprises utilizing an explosive of the shaped charge for the exposing.
Dependencies are inferred from the claim text.