초록 ▼

A shaped charge for use in perforating formation adjacent a wellbore includes a liner having a substantially non-conical shape (also referred to as bowl-shaped). The liner has first and second layers, with a first layer contacting the main explosive charge. The second layer (made of such materials a

A shaped charge for use in perforating formation adjacent a wellbore includes a liner having a substantially non-conical shape (also referred to as bowl-shaped). The liner has first and second layers, with a first layer contacting the main explosive charge. The second layer (made of such materials as copper, silver, gold, and so forth) contributes primarily to formation of a perforating jet while the first layer contains a material that substantially disintegrates upon detonation such that formation of a slug is reduced or eliminated.

대표청구항 ▼

[ What is claimed is:] [1.] A shaped charge, comprising:a case;an explosive charge contained in the case; anda liner having a substantial portion that is generally bowl-shaped, wherein the liner includes a first layer of a first material and a second layer of a second, different material, the first

[ What is claimed is:] [1.] A shaped charge, comprising:a case;an explosive charge contained in the case; anda liner having a substantial portion that is generally bowl-shaped, wherein the liner includes a first layer of a first material and a second layer of a second, different material, the first layer having a portion with a first thickness and the second layer having a portion with a second thickness, the first layer positioned between the explosive charge and the second layer, the first thickness to second thickness ratio being less than about 3:1 and greater than about 1:3, and the first layer having a low temperature melting point such that upon detonation the first layer substantially disintegrates to reduce slug formation,wherein the bowl-shaped liner has a shape selected from the group consisting of generally parabolic, generally hemispherical, and tulip-shape; andwherein the first material is selected from the group consisting of zinc, lead, tin, a particulated metal, a metal alloy, plastic, nylon, and epoxy.