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 effects 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.

Abstract: Shaped charge liners are formed from an alloy of nickel, tin, and copper, which is first formed into a powder, and then pressed into strips. The pressed strips of powdered alloy are next sintered and then cold rolled. Thereafter, the powdered, pressed, and sintered alloy strips are formed into shaped charge liners, for example, by stamping. The shaped charge liners may be heat treated either before or after the forming step.

Abstract: A shaped charge and liner having a minimum outside diameter determined by the formula:D.sub.L =2.625-0.3571(6 -D.sub.ID)Where:D.sub.L =Liner Minimum Outside DiameterD.sub.ID =Carrier Inside DiameterThe geometry of the shaped charge reduces the chances of interference between charges by controlling burn time, as does the positioning of the primer cord. The liner has an open end with a minimum outside diameter determined by the formula. The shape of the case and liner is determined by keeping the center of the primer cord a distance not greater than 0.10 (D.sub.ID) from the center line of the carrier, ideally not greater than 0.05 (D.sub.ID). This yields a large diameter, flat shaped charge that may be loaded in a tubular carrier having a charge or perforation density of at least 10 shots per foot.

Abstract: A high density perforating gun having a carrier housing tube and an interior charge holder tube through which are mounted zinc alloy shaped charges in a phased relationship between about 135 and 145 degrees. The 135 to 145 degree phased relationship provides for an 18 shot per foot perforating gun system. The shaped charges of selected length are inserted into the carrier housing tube and held in place by fastener rings fitted to fastener ring slots. The nose ends of the shaped charges are fitted with ears to receive a detonating cord. This positions the primer cord in tension and generally coaxially with the carrier housing tube to prevent charge interference and assure sequential detonation.