US 2018/0252507 A1Published application

Fluted linear shaped charge with simultaneous initiation

OwnerNicholas Collierinventor

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Abstract

This patent relates to lined shaped explosive devices, in particular it relates to linear Shaped Charges (SC), more particularly it relates to a Fluted or Scalloped Linear Shaped Charge. The fluted linear SC, unlike a standard linear SC produces hydrodynamic penetration, higher jet velocities, higher mass jets and deeper penetration. The fluted linear device disclosed herein produces greater compression and convergence of the liner material because of the partial radial collapse of the concave flutes. Further, the fluted linear SC is equipped with a simultaneous initiation of the full length of the explosive driving the liner, providing smooth detonation wave front along the full length of the fluted linear liner.

Claims17

Dependent claims

A fluted linear shaped charge device, the fluted linear shaped charge device comprising:

a containment body, wherein
the containment body includes:
a closed end;
one or more initiation ports, wherein the one or more initiation ports each include an aperture through the closed end;
one or more curved surfaces adjacent the closed end;
and
an open end opposite the closed end;
the closed end and the one or more curved surfaces create an enclosure;
one or more initiators, wherein each initiator passes through one of the one or more initiation ports from the exterior of the enclosure to the interior of the enclosure;
a simultaneous initiation plate on the exterior of the enclosure, the simultaneous initiation plate configured to ensure that each initiator detonates simultaneously;
a fluted liner, wherein the fluted liner includes:
one or more flutes, wherein:
a portion of the one or more flutes:
match the curvature of the one or more curved surfaces in the containment body at the open end;
and
are in contact with the containment body at the open end;
and
a high explosive billet, wherein the high explosive billet:
is in contact with a portion of the initiator;
and
is placed between the closed end of the containment body and the fluted liner.

18 more elements

A system for removal of at least a portion of an oil well casing, the removed casing being disposed of within the oil well, the system comprising:

a casing cutter, the casing cutter configured to cut an oil well casing to a desired length;
and
a fluted linear shaped charge device, wherein the fluted linear shaped charge device includes:
a containment body, wherein
the containment body includes:
a closed end;
one or more initiation ports, wherein the one or more initiation ports each include an aperture through the closed end;
one or more curved surfaces adjacent the closed end;
and
an open end opposite the closed end;
the closed end and the one or more curved surfaces create an enclosure;
one or more dual line initiation cups, wherein each dual line initiation cup:
passes through one of the one or more initiation ports from the exterior of the enclosure to the interior of the enclosure;
and
includes:
a first branch;
and
a second branch;
a simultaneous initiation plate on the exterior of the enclosure, the simultaneous initiation plate configured to ensure that each dual line initiation cup detonates simultaneously;
a shock attenuator, wherein the shock attenuator includes a low sound speed material placed between the first branch and the second branch of each dual line initiation cup;
a fluted liner, wherein the fluted liner includes:
one or more flutes, wherein:
a portion of the one or more flutes:
match the curvature of the one or more curved surfaces in the containment body at the open end;
and
are in contact with the containment body at the open end;
and
a high explosive billet, wherein the high explosive billet:
is in contact with a portion of the first branch and the second branch of each dual line initiation cup;
and
is placed between the shock attenuator and the fluted liner.

28 more elements

A method for removing of at least a portion of an oil well casing, the removed casing being disposed of within the oil well, the method comprising:

cutting an oil well casing at a first location to a desired length and arc length using a casing cutter;
cutting the oil well casing at second first location to a desired length and arc length using the casing cutter;
placing a fluted linear shaped charge device between the first location and the second location, wherein the fluted linear shaped charge device includes:
a containment body, wherein
the containment body includes:
a closed end;
one or more initiation ports, wherein the one or more initiation ports each include an aperture through the closed end;
one or more curved surfaces adjacent the closed end;
and
an open end opposite the closed end;
the closed end and the one or more curved surfaces create an enclosure;
one or more dual line initiation cups, wherein each dual line initiation cup:
passes through one of the one or more initiation ports from the exterior of the enclosure to the interior of the enclosure;
and
includes:
a first branch;
and
a second branch;
a simultaneous initiation plate on the exterior of the enclosure, the simultaneous initiation plate configured to ensure that each dual line initiation cup detonates simultaneously;
a shock attenuator, wherein the shock attenuator includes a low sound speed material placed between the first branch and the second branch of each dual line initiation cup;
a fluted liner, wherein the fluted liner includes:
one or more flutes, wherein:
a portion of the one or more flutes:
includes a frusto conical shape;
match the curvature of the one or more curved surfaces in the containment body at the open end;
and
are in contact with the containment body at the open end;
each flute includes a liner;
and
a high explosive billet, wherein the high explosive billet:
is in contact with a portion of the first branch and the second branch of each dual line initiation cup;
and
is placed between the shock attenuator and the fluted liner;
and
initiating the detonation of the fluted linear shaped charge device.

32 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/910,885Filed 2 Mar 2018
Priority: 2 Mar 2017
Published: 6 Sep 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F42B 1/028
Shaped or hollow charges: characterised by the form of the liner
E21B 29/02
Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming…
E21B 43/117
Gun or shaped-charge perforators: shaped-charge perforators
F42B 3/26
Blasting cartridges, i.e. case and explosive: arrangements for mounting initiators; Accessories therefor, e.g. tools

Family

Application62/466,296Us provisional application · filed 2 Mar 2017
US 10,458,761 B2Related patent
US 2018/0252507 A1This patent

From the US filing history. Foreign family members aren’t listed.

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