Shaped-charge liner
AssigneeOwen Oil Tools LP
InventorsDan W. Pratt, David S. Wesson, John K. Rouse
Life of this patent
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Abstract
A liner for a explosive shaped charge, such as those used in perforating operations in oil and gas wells, is formed from a powdered metal mixture that includes molybdenum. The molybdenum allows a higher density liner to be formed to create denser jets for achieving deeper penetration, but without the negative effect that often accompany the use of higher density materials. The molybdenum may be used in the amount of 0.5% to 25% by weight of the metal mixture, with tungsten and other constituents forming the remainder of the mixture.
Claims24
A liner material for use in a shaped explosive charge, the liner material comprising:
- a powdered metal mixture that contains molybdenum and at least one high density metal.
A shaped explosive charge comprising:
- a casing having an interior wall and a hollow interior;
- a liner formed from a powdered metal mixture is containing at least molybdenum and a high density metal, the molybdenum and high density metal being positioned within the interior or the casing;
- and
- an explosive material disposed within the interior of the casing between the interior wall and the liner.
A method of forming a perforation within a formation surrounding a borehole of an oil or gas well using a shaped explosive charge that reduces slugging and increases formation penetration, the method comprising.
- positioning a shaped explosive charge within the borehole of the well, the explosive charge having a hollow casing with an interior wall and a hollow interior;
- providing a liner formed from a powdered metal mixture containing molybdenum that is positioned within the casing;
- providing an explosive material disposed within the casing between the interior wall and the liner;
- and
- detonating the explosive charge so that a jet is formed from the liner that penetrates the formation to form a perforation.
Dependencies are inferred from the claim text.