US Patent 11220891 Shaped charge with tri-radii liner for oilfield perforating

Provided are liners for a shaped charge and corresponding methods of use. An example liner comprises a generally conical shape having an apex, an open side, a liner wall comprising a thickness, and an axis extending through the center of the liner from the apex to the center of the open side. The liner comprises a liner height extending in a vertical plane from the center of the open side to the apex, a liner radius extending along a horizontal plane that is perpendicular to the axis at the open side of the liner and that extends from the axis to an outermost edge of the liner wall. The ratio of the liner height to the liner diameter is about 0.90 to about 1.10. The liner wall comprises an apex curvature, a first wall curvature, a second wall curvature, and a third wall curvature.