초록 ▼

A method and apparatus for use in well perforating systems and disclosed for firing slapper on exploding foil initiator over relatively lengthy firing lines. Specially designed detonators or initiators of the exploding foil or slapper type are used wherein the type of material used and/or the geomet

A method and apparatus for use in well perforating systems and disclosed for firing slapper on exploding foil initiator over relatively lengthy firing lines. Specially designed detonators or initiators of the exploding foil or slapper type are used wherein the type of material used and/or the geometry of the exploding foil causes electrical preloading of the firing lines from the firing pulse generator to the detonator or initiator. The preloading prevents premature inductive and resistive disposition of the high intensity firing pulse traversing the firing lines.

대표청구항 ▼

An initiator for detonation of an elongate explosive cord extending to plural shaped charges in a well borehole, the initiator comprising: (a) a closed housing connected to an elongate explosive cord; (b) secondary explosive charge means in said housing positioned relative to said explosive cord to

An initiator for detonation of an elongate explosive cord extending to plural shaped charges in a well borehole, the initiator comprising: (a) a closed housing connected to an elongate explosive cord; (b) secondary explosive charge means in said housing positioned relative to said explosive cord to detonate said cord and wherein said charge means has an exposed face; (c) a transverse structural member disposed against said exposed face and having a passage therein wherein said passage has a face end against said exposed face and spaced from a remote end; (d) a sheet member of electrically insulated material spanning said remote passage end and attached to said structural member by an adhesive means; (e) a sacrificial metal foil member adjacent to said sheet member and aligned with said passage end; (f) a pair of electrical conductors connected into said housing for electrical connection to said metal foil to deliver current through said housing to vaporize said foil on sufficient current flow; and (g) wherein said housing confines vaporization of said metal foil to cause detonation through said passage toward said charge means face.