US 9,574,416 B2 · Explosive tubular cutter and devices usable therewith

Abstract

Explosive cutter assemblies and methods include a liner having a single unitary body, and an explosive charge disposed within the liner. The explosive charge includes a continuous unitary body of explosive material having a first area disposed in association with an inner surface of the liner and a second area extending from the center of the assembly to the first area. A detonator can be used to ignite the second area of explosive material, causing propagation of a detonation to the first area, which in turn causes deformation of the liner and projection of the liner toward a target to form a cut. An adaptor sub having a detonator within can be inserted into the cutter assembly to secure the assembly together, position the detonator in association with the explosive material, and engage a conduit usable to raise and lower the cutter assembly and transmit a detonation signal.

Claims20

Dependent claims

An explosive cutter assembly comprising:

a housing assembly comprising an upper plate and a lower plate, wherein the upper and lower plates each comprise a flat surface positioned parallel relative to each other, a vertical surface extending in a transverse relationship to the flat surface, and a diagonal surface adjacent to the vertical surface;
a circular liner comprising an upper diagonal liner section, a lower diagonal liner section, and a vertical liner section positioned between the upper and lower diagonal liner sections, wherein the circular liner comprises a single-piece construction;
and
an explosive charge comprising a main charge and a detonation disc, wherein the main charge is positioned between the circular liner and the vertical and diagonal surfaces of the upper and lower plates, wherein the detonation disc is positioned between the flat surfaces of the upper and lower plates, and wherein the explosive charge comprises a single-piece construction.

1 more element

Dependencies are inferred from the claim text.

Explosive tubular cutter and devices usable therewith

Life of this patent

Explosive tubular cutter and devices usable therewith

Life of this patent

Abstract

Claims20