Shaped charge liner and process
First Claim
Patent Images
1. A shaped charge comprising:
- a casing, a liner, and an explosive charge;
said casing having an apex at which to connect a detonation source, a mouth, and a divergent wall structure extending between said apex and said mouth, said divergent wall structure being narrower at said apex of said casing than at said mouth;
said liner having a central region and a divergent skirt extending from said central region, said central region lying closer to said apex than to said mouth, and said skirt being mounted to said divergent wall structure closer to said mouth than to said apex;
a charge cavity defined between said casing and said liner;
said explosive charge being contained within said charge cavity; and
said liner being formed from a metal material whose greatest component, by weight, is zinc; and
said explosive charge being operable to cause a perforating jet to be formed from said metal material.
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Abstract
Shaped charge liners, typically used in perforating guns, are formed from a zinc alloy of zinc and other metals such as aluminium and magnesium. The liners are formed into desired shapes, for example, by melting ingots and casting the alloy, or by machining bars formed from the alloy, or by stamping strips formed from the alloy, or by pressing powder formed from the alloy.
46 Citations
50 Claims
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1. A shaped charge comprising:
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a casing, a liner, and an explosive charge;
said casing having an apex at which to connect a detonation source, a mouth, and a divergent wall structure extending between said apex and said mouth, said divergent wall structure being narrower at said apex of said casing than at said mouth;
said liner having a central region and a divergent skirt extending from said central region, said central region lying closer to said apex than to said mouth, and said skirt being mounted to said divergent wall structure closer to said mouth than to said apex;
a charge cavity defined between said casing and said liner;
said explosive charge being contained within said charge cavity; and
said liner being formed from a metal material whose greatest component, by weight, is zinc; and
said explosive charge being operable to cause a perforating jet to be formed from said metal material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A process of manufacturing a shaped charge, said method comprising the steps of:
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providing a casing having an apex at which to connect a detonation source, a mouth, and a divergent wall structure extending between said apex and said mouth, said divergent wall structure being narrower at said apex of said casing than at said mouth;
forming a liner from a metal material whose greatest component, by weight, is zinc, the liner having a central region and a divergent skirt extending from said central region;
providing an explosive charge for causing, in use, a perforating jet to be formed of a portion of said zinc containing metal material, and locating the explosive charge in the casing;
locating the liner in position relative to the casing to form a charge cavity containing the explosive charge; and
said step of locating the liner in position including the step of locating said central region of the liner closer to said apex of said casing than to said mouth and locating the skirt adjacent to the divergent wall structure closer to said mouth than to the apex. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A kit for assembling into a shaped charge for receiving and retaining an explosive charge for use with perforating guns, comprising:
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a casing; and
a liner for forming a perforating jet when the explosive charge is detonated;
said casing having an apex at which to connect a detonation source, a mouth, and a divergent wall structure extending between said apex and said mouth, said divergent wall structure being narrower at said apex of said casing than at said mouth;
said liner having a central region and a divergent skirt extending from said central region, said skirt being mountable to said divergent wall structure to form a charge cavity between said liner and said casing for containing the explosive charge;
said liner being mountable to said casing, and said skirt being closer to said mouth than to said apex and said central region lying closer to said apex than to said mouth upon mounting said skirt to said divergent wall structure; and
said liner for forming a perforating jet being formed from a metal material whose greatest component, by weight, is zinc. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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39. A method of manufacturing a shaped charge liner for use with a casing for containing an explosive charge, the liner permitting a perforating jet to be formed therefrom upon detonation of the explosive charge, the casing having an apex at which to contact a detonation source, a mouth, and a divergent wall structure extending between said apex and the mouth, the divergent wall structure being narrower at said apex of said casing than at the mouth, said method comprising the steps of:
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forming said liner to have a central region and a divergent skirt extending from the central region;
said skirt being mountable to the divergent wall structure to form a charge cavity between said liner and the casing for containing the explosive charge;
said skirt being closer to the mouth than to the apex, and said central region lying closer to the apex than to the mouth upon mounting of said skirt to the divergent wall structure; and
said liner for forming the perforating jet being formed from a metal material whose greatest component, by weight, is zinc. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A shaped charge comprising:
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a casing, a liner, and an explosive charge;
said casing having an apex at which to connect a detonation source, a mouth, and a divergent wall structure extending between said apex and said mouth, said divergent wall structure being narrower at said apex of said casing than at said mouth;
said liner having a central region and a divergent skirt extending from said central region, said central region lying closer to said apex than to said mouth, and said skirt being mounted to said divergent wall structure closer to said mouth than to said apex;
a charge cavity defined between said casing and said liner;
said explosive charge being contained within said charge cavity;
said liner being formed from a metal material whose greatest component, by weight, is zinc; and
said metal material being at least 70% zinc by weight.
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50. A shaped charge comprising:
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a casing, a liner, and an explosive charge;
said casing having an apex at which to connect a detonation source, a mouth, and a divergent wall structure extending between said apex and said mouth, said divergent wall structure being narrower at said apex of said casing than at said mouth;
said liner having a central region and a divergent skirt extending from said central region, said central region lying closer to said apex than to said mouth, and said skirt being mounted to said divergent wall structure closer to said mouth than to said apex;
a charge cavity defined between said casing and said liner;
said explosive charge being contained within said charge cavity; and
said liner being formed from a single material whose greatest component, by weight, is zinc.
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Specification