Patent ID: 9470483
Filing Date: 2016-10-18
CPC Classification: E21B,F42B

Claim Text:
1. An oil shaped charge for deeper penetration comprises: a case; a quantity of explosive material; a liner; the case comprises a first conical inner surface, a second conical inner surface, a step conical inner surface, a third conical inner surface, and a fourth conical inner surface; the liner comprises a tip conical region, a front conical region, a rear conical region, and a step conical region; the case and the liner being radially positioned around a central axis; the liner being coaxially mounted within the case along the central axis and offset from an inner surface of the case; the step conical inner surface being adjacently positioned around the step conical region; the quantity of explosive material being radially interposed between the case and the liner; the step conical inner surface, the third conical inner surface, and the fourth conical inner surface each comprise a first edge and a second edge; a third radial distance being extended from the second edge of the second conical inner surface and the first edge of the step conical inner surface to the central axis; a fourth radial distance being extended from the second edge of the step conical inner surface and the first edge of the third conical inner surface to the central axis; the fourth radial distance being greater than the third radial distance; an average wall thickness of the liner being extended between an outer surface and an inner surface of the liner; the average wall thickness of the rear conical region being greater than the average wall thickness of the tip conical region; the wall thickness of a rear end for the front conical region and the average wall thickness of the rear conical region have a ratio of 0.10 through 0.99; a step width being extended from a first rim of the step conical region to a second rim of the step conical region along the central axis; and an overall length being extended from an apex end of the tip conical region to a rim of the rear conical region along the central axis rear conical region along the central axis; and the step width being ranged between 0.01 of the overall length to 0.7 of the overall length.