CA1334492C - High performance shaped charge - Google Patents
High performance shaped chargeInfo
- Publication number
- CA1334492C CA1334492C CA000461220A CA461220A CA1334492C CA 1334492 C CA1334492 C CA 1334492C CA 000461220 A CA000461220 A CA 000461220A CA 461220 A CA461220 A CA 461220A CA 1334492 C CA1334492 C CA 1334492C
- Authority
- CA
- Canada
- Prior art keywords
- explosive
- shaped charge
- charge according
- receiver
- covering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container
- F42B1/02—Shaped or hollow charges
- F42B1/024—Shaped or hollow charges provided with embedded bodies of inert material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S102/00—Ammunition and explosives
- Y10S102/701—Charge wave forming
Abstract
High performance shaped charge which can have a symmetry of revolution about an axis, has a priming system constituted by a punctiform initiating source producing a detonation wave in a donor explosive block and a cavity positioned between the donor explosive and the receiver explosive. The cavity is shaped in such a way that the detonation wave in the receiver explosive and then in the charging explosive can be planar and perpendicular to the axis of the charge. The invention finds an application in the piercing of high strength steel sheets.
Description
1 33~
SHAPED CHARGE
BACKGROUND OF THE INVENTION
The present invention relates to a new type of shaped charge and particularly a hollow charge having a revolution shape covering, which can be conical or possibly dihedral and which is moved by a charging explosive initiated by a priming explosive block.
Modern developments in this technical field are seeking a significant increase in the piercing or perforating power of the shaped charges and particularly hollow charges. This research has led to consideration being given to the use of high performance covering geometries (closed angles, reduced thickness), but which are correlatively relatively sensitive to technical defects and particularly priming deton-ation wave distortions.
The hitherto produced shaped charges are equipped with priming systems having spherical waves (punctiform priming) or toroidal waves (annular priming). Experimental results have revealed that passing from punctiform priming to annular priming leads to an approximately 15%
increase in the depths by which high-strength steel is pierced. However, a serious disadvantage of this priming procedure is due to a lack of performance reproducibility. This is on the one hand due to the naturally unstable character of convergent detonation wave systems and on the other hand to the considerable sensitivity of the covering projection mechanism limiting the hollow charge to B 7989.3 JR
SHAPED CHARGE
BACKGROUND OF THE INVENTION
The present invention relates to a new type of shaped charge and particularly a hollow charge having a revolution shape covering, which can be conical or possibly dihedral and which is moved by a charging explosive initiated by a priming explosive block.
Modern developments in this technical field are seeking a significant increase in the piercing or perforating power of the shaped charges and particularly hollow charges. This research has led to consideration being given to the use of high performance covering geometries (closed angles, reduced thickness), but which are correlatively relatively sensitive to technical defects and particularly priming deton-ation wave distortions.
The hitherto produced shaped charges are equipped with priming systems having spherical waves (punctiform priming) or toroidal waves (annular priming). Experimental results have revealed that passing from punctiform priming to annular priming leads to an approximately 15%
increase in the depths by which high-strength steel is pierced. However, a serious disadvantage of this priming procedure is due to a lack of performance reproducibility. This is on the one hand due to the naturally unstable character of convergent detonation wave systems and on the other hand to the considerable sensitivity of the covering projection mechanism limiting the hollow charge to B 7989.3 JR
2 1 33~449;~
the symmetry defects of the detonation wave when it simultaneously attacks the said covering.
Another problem generally encountered with this type of priming results from the need for the detonation wave to acquire a maximum energy level. This makes it necessary for the deton-ation wave to pass along an adequate "detonation path" between the initiation point and the covering. Generally this constraint seriously penalizes the weight and overall dimensions balances of the device.
SUMMARY 0~ THE INVENTION
The present invention aims at obviating these disadvantages by means of an improved shaped charge making it possible to simultaneously achieve the following advances:
- use of the highest performance covering geometries (particularly closed angles and reduced thicknesses);
0 ~ use of extremely high energy explosives, which are sometimes difficult to prime by conventional methods, particularly in con-nection with TNT binder explosives;
- technical ease of manufacture and fitting the charges, because the plane wave is relatively insensitive to the coaxiality problems, of the priming block and the hollow charge block;
- reduced weight and overall dimensions, because the wave produced by the charging explosive has an energy profile which can be immediately used for the projection of the hollow charge cone, so that the latter can be located in the immediate vicinity of the priming system;
- increase in the energy transferred to the covering by the effect of the axial confinement produced, i.e. the rearward expansion of the detonation wave is limited.
According to the present invention there is provided a shaped charge comprising a charging explosive having a covering with an axis of symmetry, and a priming system incorporating a donor explosive and a receiver explosive for initiating the charging explosive, wherein the priming system comprises:
- an initiating source for producing a detonation wave in the donor explosive, which wave is received by the receiver explosive and by the charging explosive; and 15 - the donor explosive and the receiver explosive have respective surfaces which define a cavity between the donor explosive and receiver explosive, the surface of the donor explosive defining the cavity being concave shaped toward the initiating source and cooperating with the surface of the receiver explosive so that the detonation wave in the receiver explosive and in the charging explosive is planar and perpendicular to the axis of symmetry of the covering.
Preferably, the surface of the donor explosive may be planar or concave (spherical, ellipsoidal, paraboloid, hyperboloid, etc.).
The surface of the donor explosive can have a projection covering which, upon explosion of the donor explosive, is projected onto the surface of the receiver explosive.
According to another preferred feature of the inventlon, n the projection covering can be metallic, bi-metallic, composite, organic or organometallic.
The thickness of the covering can be constant or variable (in this case decreasing from the axis towards the periphery).
According to another feature, the cavity can be constituted by a vacuum, a gas under a low pressure (equal to or below 1 bar), e.g. nitrogen or by a compressible lightweight material such 0 as a foam.
According to other features:
- the surface limiting the cavity at the receiver explosive can be covered with a metallic and/or organic coating; 5 - the projection covering and the coating on the surface limiting the cavity at the receiver explosive constitute a tight capsule;
- the apex of the covering of the shaped charge is positioned in the vicinity of the cavity;
- the priming system only or the complete charge can be confined in a rigid envelope.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is described in greater detail hereinafter relative to non-limitative embodiments and with reference to the attached drawings, wherein show:
Fig. 1 a longitudinal section through a shaped charge according to the invention and its priming device.
Figs. 2 variants of the priming system.
to 5 l 334492 Fig. 6 the tight capsule formed by the projection covering and the coating limiting the cavity on the side of the receiver explosive.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Fig. 1 shows a first embodiment of a priming system 1 associated with a hollow charge 2 which, in conventional manner, comprises a conical covering 3 and the so-called "charging explosive".
The priming system comprises a punctiform initiating source, a first explosive called the "donor explosive", a second explosive called the "receiver explosive", and a cavity 8 between said donor and receiver explosives, the complete entity being included in an envelope 9. The latter may only surround the priming system 1 or may completely envelop the charge. When it is present, said envelope increases the efficiency of the assembly bringing about a confinement of the detonation products, i.e. by limiting the expansion of the detonation wave.
In the embodiment shown in Fig. 1, the cavity 8, viewed in section, is in the shape of a crescent. Surface 10 of donor explosive 6 is shaped like a sphere centred on the priming point of the charge. Surface 10 is covered with a metallic, ductile projection covering 11 which, in the particular case described here, is made from copper. The shape of the surface 12 limiting the cavity on the side of the receiver explosive 7 is defined in such a way that the detonation wave, after the projection covering 11 has passed through the entire cavity 8, is planar in the vicinity of the apex of covering 3.
This surface is determined in the following way. On considering a radius R of the spherical 5 surface 10 forming an angle O with the axis of the charge, surface 12 must be such that, on wishing to obtain a plane wave as from the plane 13 perpendicular to the axis of the charge and tangential to surface 12, it is necessary to prove the relations:
(R + OM) cos O + MH = a R OM MH
- O and M being the intersections of radius R
with the respective surfaces 10 and 12, 15 - H being the projection of M on plane 13, - Dl and D2 being the respective detonation velocities of the donor explosive and the receiver explosive;
- a being the distance between the punctiform initiating source and plane 13, - ~ being the time taken by the detonation wave from the punctiform source to the plane 13, and - VO being the projection speed of covering 11.
Surface 12 is then given by the following table:
7 1 3344q2 e (d ) OM
R
0 0.333 0.327 0.307 0.276 0.237 0.191 0.143 0.093 0.045 The variant represented in Fig. 2 shows a priming system according to the invention, for which the projection covering 11 has a variable thickness. Thus, the thickness is greater in the area located in the axis of the charge and decreases towards the edges of the cavity. In this particular case, the covering mass or weight per surface unit projected on the opposite face of the cavity during priming d~creases in the same way. Thus, the s~eed of the covering in an axial region is substantially less than that in the peripheral areas. This more particularly leads to a reduction in the distance OM, i.e. the width of the cavity 8 in the area adjacent to the axis of the charge, which makes it possible to obtain a priming system with reduced overall dimensions.
The broken line 12a in Fig. 2 indicates what would be the location of surface 12 limiting the cavity 8 on the side of the receiver explosive 7, 8 1 ~4492 on choosing a projection covering 11 with a constant thickness.
Fig. 3 shows another embodiment, in which the projection covering 11 is made from copper, whilst the receiver explosive 7 is covered with a metallic coating 14, e.g. of steel, which has the function of reinforcing the mechanical strength of the receiver explosive.
Moreover, in this case, cavity 8 is filled with a honeycomb material 15, whereby the latter can be a foam such as expanded polystyrene, which is consequently highly compressed at the time of priming.
Fig. 4 shows another possible embodiment of cavity 8. The surface 10 of the donor explosive is planar and is covered with a composite pro-jection covering 11, constituted by two plates lla ~nd llb. Plate lla can be made from plexi-glass or aluminium and plate llb from copper.
The object of this composite structure is to prevent flaking off of plate llb including the projection thereof, because a possible flaking off would be prejudicial to the repriming con-ditions for receiver explosive 7.
Fig. 5 shows a priming system, in which the surfaces 10 and 12 are not covered by a film, which simplifies the manufacture of the device.
Finally, Fig. 6 shows a capsule which can be tight and which is constituted by the pro-jection covering 11, and the metallic film 14 covering surface 12.
Other variants can be envisaged without passing beyond the scope of the invention. Thus, 1 3344~2 surfaces 10 can be ellipsoidal, paraboloid, hyperboloid or more generally have a shape such that the surface is expansible, i.e. at the time of the explosion the tangential de-formation stresses of the plate or projection S covering are tensile stresses. Moreover, the cavities can contain a gas, which can be inert e.g. nitrogen. A vacuum can also be produced, particularly in the case of the capsule-like cavity of Fig. 6. The projection covering 11, as well as the metallic film 14 can be in intimate contact with the explosives, but can also be arranged in such a way that there is a space between these coverings and the adjacent ex-plosive mass, whereby said space can be under vacuum or can contain air or a particular gas.
the symmetry defects of the detonation wave when it simultaneously attacks the said covering.
Another problem generally encountered with this type of priming results from the need for the detonation wave to acquire a maximum energy level. This makes it necessary for the deton-ation wave to pass along an adequate "detonation path" between the initiation point and the covering. Generally this constraint seriously penalizes the weight and overall dimensions balances of the device.
SUMMARY 0~ THE INVENTION
The present invention aims at obviating these disadvantages by means of an improved shaped charge making it possible to simultaneously achieve the following advances:
- use of the highest performance covering geometries (particularly closed angles and reduced thicknesses);
0 ~ use of extremely high energy explosives, which are sometimes difficult to prime by conventional methods, particularly in con-nection with TNT binder explosives;
- technical ease of manufacture and fitting the charges, because the plane wave is relatively insensitive to the coaxiality problems, of the priming block and the hollow charge block;
- reduced weight and overall dimensions, because the wave produced by the charging explosive has an energy profile which can be immediately used for the projection of the hollow charge cone, so that the latter can be located in the immediate vicinity of the priming system;
- increase in the energy transferred to the covering by the effect of the axial confinement produced, i.e. the rearward expansion of the detonation wave is limited.
According to the present invention there is provided a shaped charge comprising a charging explosive having a covering with an axis of symmetry, and a priming system incorporating a donor explosive and a receiver explosive for initiating the charging explosive, wherein the priming system comprises:
- an initiating source for producing a detonation wave in the donor explosive, which wave is received by the receiver explosive and by the charging explosive; and 15 - the donor explosive and the receiver explosive have respective surfaces which define a cavity between the donor explosive and receiver explosive, the surface of the donor explosive defining the cavity being concave shaped toward the initiating source and cooperating with the surface of the receiver explosive so that the detonation wave in the receiver explosive and in the charging explosive is planar and perpendicular to the axis of symmetry of the covering.
Preferably, the surface of the donor explosive may be planar or concave (spherical, ellipsoidal, paraboloid, hyperboloid, etc.).
The surface of the donor explosive can have a projection covering which, upon explosion of the donor explosive, is projected onto the surface of the receiver explosive.
According to another preferred feature of the inventlon, n the projection covering can be metallic, bi-metallic, composite, organic or organometallic.
The thickness of the covering can be constant or variable (in this case decreasing from the axis towards the periphery).
According to another feature, the cavity can be constituted by a vacuum, a gas under a low pressure (equal to or below 1 bar), e.g. nitrogen or by a compressible lightweight material such 0 as a foam.
According to other features:
- the surface limiting the cavity at the receiver explosive can be covered with a metallic and/or organic coating; 5 - the projection covering and the coating on the surface limiting the cavity at the receiver explosive constitute a tight capsule;
- the apex of the covering of the shaped charge is positioned in the vicinity of the cavity;
- the priming system only or the complete charge can be confined in a rigid envelope.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is described in greater detail hereinafter relative to non-limitative embodiments and with reference to the attached drawings, wherein show:
Fig. 1 a longitudinal section through a shaped charge according to the invention and its priming device.
Figs. 2 variants of the priming system.
to 5 l 334492 Fig. 6 the tight capsule formed by the projection covering and the coating limiting the cavity on the side of the receiver explosive.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Fig. 1 shows a first embodiment of a priming system 1 associated with a hollow charge 2 which, in conventional manner, comprises a conical covering 3 and the so-called "charging explosive".
The priming system comprises a punctiform initiating source, a first explosive called the "donor explosive", a second explosive called the "receiver explosive", and a cavity 8 between said donor and receiver explosives, the complete entity being included in an envelope 9. The latter may only surround the priming system 1 or may completely envelop the charge. When it is present, said envelope increases the efficiency of the assembly bringing about a confinement of the detonation products, i.e. by limiting the expansion of the detonation wave.
In the embodiment shown in Fig. 1, the cavity 8, viewed in section, is in the shape of a crescent. Surface 10 of donor explosive 6 is shaped like a sphere centred on the priming point of the charge. Surface 10 is covered with a metallic, ductile projection covering 11 which, in the particular case described here, is made from copper. The shape of the surface 12 limiting the cavity on the side of the receiver explosive 7 is defined in such a way that the detonation wave, after the projection covering 11 has passed through the entire cavity 8, is planar in the vicinity of the apex of covering 3.
This surface is determined in the following way. On considering a radius R of the spherical 5 surface 10 forming an angle O with the axis of the charge, surface 12 must be such that, on wishing to obtain a plane wave as from the plane 13 perpendicular to the axis of the charge and tangential to surface 12, it is necessary to prove the relations:
(R + OM) cos O + MH = a R OM MH
- O and M being the intersections of radius R
with the respective surfaces 10 and 12, 15 - H being the projection of M on plane 13, - Dl and D2 being the respective detonation velocities of the donor explosive and the receiver explosive;
- a being the distance between the punctiform initiating source and plane 13, - ~ being the time taken by the detonation wave from the punctiform source to the plane 13, and - VO being the projection speed of covering 11.
Surface 12 is then given by the following table:
7 1 3344q2 e (d ) OM
R
0 0.333 0.327 0.307 0.276 0.237 0.191 0.143 0.093 0.045 The variant represented in Fig. 2 shows a priming system according to the invention, for which the projection covering 11 has a variable thickness. Thus, the thickness is greater in the area located in the axis of the charge and decreases towards the edges of the cavity. In this particular case, the covering mass or weight per surface unit projected on the opposite face of the cavity during priming d~creases in the same way. Thus, the s~eed of the covering in an axial region is substantially less than that in the peripheral areas. This more particularly leads to a reduction in the distance OM, i.e. the width of the cavity 8 in the area adjacent to the axis of the charge, which makes it possible to obtain a priming system with reduced overall dimensions.
The broken line 12a in Fig. 2 indicates what would be the location of surface 12 limiting the cavity 8 on the side of the receiver explosive 7, 8 1 ~4492 on choosing a projection covering 11 with a constant thickness.
Fig. 3 shows another embodiment, in which the projection covering 11 is made from copper, whilst the receiver explosive 7 is covered with a metallic coating 14, e.g. of steel, which has the function of reinforcing the mechanical strength of the receiver explosive.
Moreover, in this case, cavity 8 is filled with a honeycomb material 15, whereby the latter can be a foam such as expanded polystyrene, which is consequently highly compressed at the time of priming.
Fig. 4 shows another possible embodiment of cavity 8. The surface 10 of the donor explosive is planar and is covered with a composite pro-jection covering 11, constituted by two plates lla ~nd llb. Plate lla can be made from plexi-glass or aluminium and plate llb from copper.
The object of this composite structure is to prevent flaking off of plate llb including the projection thereof, because a possible flaking off would be prejudicial to the repriming con-ditions for receiver explosive 7.
Fig. 5 shows a priming system, in which the surfaces 10 and 12 are not covered by a film, which simplifies the manufacture of the device.
Finally, Fig. 6 shows a capsule which can be tight and which is constituted by the pro-jection covering 11, and the metallic film 14 covering surface 12.
Other variants can be envisaged without passing beyond the scope of the invention. Thus, 1 3344~2 surfaces 10 can be ellipsoidal, paraboloid, hyperboloid or more generally have a shape such that the surface is expansible, i.e. at the time of the explosion the tangential de-formation stresses of the plate or projection S covering are tensile stresses. Moreover, the cavities can contain a gas, which can be inert e.g. nitrogen. A vacuum can also be produced, particularly in the case of the capsule-like cavity of Fig. 6. The projection covering 11, as well as the metallic film 14 can be in intimate contact with the explosives, but can also be arranged in such a way that there is a space between these coverings and the adjacent ex-plosive mass, whereby said space can be under vacuum or can contain air or a particular gas.
Claims (18)
1. A shaped charge comprising a charging explosive having a covering with an axis of symmetry, and a priming system incorporating a donor explosive and a receiver explosive for initiating the charging explosive, wherein the priming system comprises:
- an initiating source for producing a detonation wave in the donor explosive, which wave is received by the receiver explosive and by the charging explosive; and - the donor explosive and the receiver explosive have respective surfaces which define a cavity between the donor explosive and receiver explosive, the surface of the donor explosive defining the cavity being concave shaped toward the initiating source and cooperating with the surface of the receiver explosive so that the detonation wave in the receiver explosive and in the charging explosive is planar and perpendicular to the axis of symmetry of the covering.
- an initiating source for producing a detonation wave in the donor explosive, which wave is received by the receiver explosive and by the charging explosive; and - the donor explosive and the receiver explosive have respective surfaces which define a cavity between the donor explosive and receiver explosive, the surface of the donor explosive defining the cavity being concave shaped toward the initiating source and cooperating with the surface of the receiver explosive so that the detonation wave in the receiver explosive and in the charging explosive is planar and perpendicular to the axis of symmetry of the covering.
2. A shaped charge according to claim 1, wherein the surface of the cavity at the receiver explosive is non-planar.
3. A shaped charge according to claim 1, wherein the surface of the receiver explosive defining the cavity is concave rearwardly toward the initiating source.
4. A shaped charge according to claim 3, wherein the surface of the donor explosive is choosen from the following surfaces: sperical, ellipsoidal, paraboloid or hyperboloid.
5. A shaped charge according to claim 1, wherein the surface of the donor explosive has a projection covering which, upon explosion of the donor explosive, is projected onto the surface of the receiver explosive.
6. A shaped charge according to claim 5, wherein the projection covering is metallic.
7. A shaped charge according to claim 5, wherein the projection covering is a composite material.
8. A shaped charge according to claim 5, wherein the projection covering comprises a material selected from the group consisting of a multimetallic, an organic or an organometallic material.
9. A shaped charge according to claim 5, wherein the projection covering is symmetrical relative to the axis and has a thickness which decreases from the axis towards a periphery of the projection covering.
10. A shaped charge according to claim 1, wherein the cavity contains a low pressure gas.
11. A shaped charge according to claim 1, wherein the cavity contains a compressible lightweight material.
12. A shaped charge according to claim 1, wherein the surface at the receiver explosive has a coating selected from the group consisting of a metallic or an organic material.
13. A shaped charge according to claim 12, wherein the projection covering and the coating form a tight capsule.
14. A shaped charge according to claim 5, wherein there is a layer of gas between the donor explosive and the projection covering.
15. A shaped charge according to claim 1, wherein the covering of the shaped charge has an apex which is located adjacent to the cavity.
16. A shaped charge according to claim 1, wherein the charge is confined in a rigid envelope.
17. A shaped charge according to claim 1, wherein said charge is hollow.
18. A shaped charge according to claim 11, wherein said lightweight material is a foam.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8313437 | 1983-08-18 | ||
| FR8313437A FR2672380B1 (en) | 1983-08-18 | 1983-08-18 | HIGH PERFORMANCE FORMED LOAD. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1334492C true CA1334492C (en) | 1995-02-21 |
Family
ID=9291684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000461220A Expired - Fee Related CA1334492C (en) | 1983-08-18 | 1984-08-17 | High performance shaped charge |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5322020A (en) |
| CA (1) | CA1334492C (en) |
| DE (1) | DE3430581A1 (en) |
| FR (1) | FR2672380B1 (en) |
| GB (1) | GB2280012B (en) |
| IT (1) | IT1236500B (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2736424B1 (en) * | 1995-07-07 | 1997-08-08 | Giat Ind Sa | MILITARY HEAD WITH FORMED LOAD |
| US5565644A (en) * | 1995-07-27 | 1996-10-15 | Western Atlas International, Inc. | Shaped charge with wave shaping lens |
| DE19718270B4 (en) * | 1997-04-30 | 2005-10-20 | Diehl Stiftung & Co Kg | Bendable pyrotechnic cutting cord |
| US5792977A (en) * | 1997-06-13 | 1998-08-11 | Western Atlas International, Inc. | High performance composite shaped charge |
| US5847312A (en) * | 1997-06-20 | 1998-12-08 | The United States Of America As Represented By The Secretary Of The Army | Shaped charge devices with multiple confinements |
| AU2859899A (en) * | 1998-03-09 | 1999-09-27 | Ildar Ibragimov | Combustion chamber of the target active defeat device (variants) |
| US6393991B1 (en) | 2000-06-13 | 2002-05-28 | General Dynamics Ordnance And Tactical Systems, Inc. | K-charge—a multipurpose shaped charge warhead |
| US6925924B2 (en) * | 2003-10-14 | 2005-08-09 | Molycorp Inc. | Method and apparatus to improve perforating effectiveness using a unique multiple point initiated shaped charge perforator |
| US9291435B2 (en) * | 2013-12-31 | 2016-03-22 | The United States Of America As Represented By The Secretary Of The Navy | Shaped charge including structures and compositions having lower explosive charge to liner mass ratio |
| NZ725004A (en) * | 2014-08-06 | 2018-06-29 | Alba Mfg Corp | An explosive booster |
| WO2016036358A1 (en) | 2014-09-03 | 2016-03-10 | Halliburton Energy Services, Inc. | Perforating systems with insensitive high explosive |
| BR112017000489A2 (en) * | 2014-09-03 | 2017-11-07 | Halliburton Energy Services Inc | method of drilling a wellbore and method of forming at least one cannon in the lining of a wellbore |
| US9612095B2 (en) * | 2014-12-12 | 2017-04-04 | Schlumberger Technology Corporation | Composite shaped charges |
| US20190112076A1 (en) * | 2017-10-16 | 2019-04-18 | The Boeing Company | Variable thickness flyer plate for penetration device |
| US11027859B2 (en) * | 2017-10-16 | 2021-06-08 | The Boeing Company | Variable stiffness flyer plate for penetration device |
| WO2019135762A1 (en) * | 2018-01-05 | 2019-07-11 | Halliburton Energy Services, Inc. | Additive manufacturing of energetic materials in oil well shaped charges |
| DE102018006741B4 (en) * | 2018-08-24 | 2022-06-15 | TDW Gesellschaft für verteidigungstecchnische Wirksysteme mbH | Tandem charge for a missile |
| RU2756836C1 (en) * | 2020-08-11 | 2021-10-06 | Акционерное общество "Конструкторское бюро приборостроения им. академика А.Г. Шипунова" | Shaped charge |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE462859A (en) * | 1945-02-06 | |||
| NL88500C (en) * | 1949-01-22 | |||
| FR1018279A (en) * | 1949-04-05 | 1953-01-05 | Schlumberger Prospection | Improvements to shaped explosive devices |
| GB714747A (en) * | 1951-09-12 | 1954-09-01 | Luvo Ltd | Improvements in projectiles containing an explosive in the form of a hollow charge |
| US3027838A (en) * | 1956-06-27 | 1962-04-03 | Borg Warner | Shaped charge |
| US3211094A (en) * | 1960-05-18 | 1965-10-12 | Jr Thomas P Liddiard | Explosive wave shaper |
| US3517615A (en) * | 1961-07-14 | 1970-06-30 | Us Navy | Explosive wave shaper |
| FR1447246A (en) * | 1965-05-18 | 1966-07-29 | Schlumberger Prospection | Explosive charge for putting the boreholes into production |
| US4004515A (en) * | 1971-01-25 | 1977-01-25 | The United States Of America As Represented By The Secretary Of The Navy | Sequential jet shaped charge |
| GB1604010A (en) * | 1972-04-28 | 1981-12-02 | France Armed Forces | Armour piercing projectiles |
| FR2308906A1 (en) * | 1975-04-23 | 1976-11-19 | Luchaire Sa | Hollow explosive charge fuse - has air chamber between priming charge and apex of hollow charge sheathing |
| FR2325903A2 (en) * | 1975-09-29 | 1977-04-22 | Luchaire Sa | Hollow explosive charge primer - has cavity at sides of casting apex filled with low density material |
| DE2553315A1 (en) * | 1975-11-27 | 1977-06-02 | Messerschmitt Boelkow Blohm | Multicomponent ammunition with improved detonating wave propagation - obtd. by gas impermeable layers at joint interfaces |
| DE2706060C2 (en) * | 1977-02-12 | 1982-03-25 | Rheinmetall GmbH, 4000 Düsseldorf | Method for guiding the detonation wave in the explosives of shaped charges |
| US4729318A (en) * | 1987-03-12 | 1988-03-08 | The United States Of America As Represented By The United States Department Of Energy | Explosive plane-wave lens |
-
1983
- 1983-08-18 FR FR8313437A patent/FR2672380B1/en not_active Expired - Fee Related
-
1984
- 1984-08-10 GB GB8420375A patent/GB2280012B/en not_active Expired - Fee Related
- 1984-08-17 US US06/654,095 patent/US5322020A/en not_active Expired - Fee Related
- 1984-08-17 CA CA000461220A patent/CA1334492C/en not_active Expired - Fee Related
- 1984-08-17 IT IT8448737A patent/IT1236500B/en active
- 1984-08-20 DE DE19843430581 patent/DE3430581A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2672380A1 (en) | 1992-08-07 |
| FR2672380B1 (en) | 1993-12-31 |
| DE3430581C2 (en) | 1993-09-23 |
| IT1236500B (en) | 1993-03-11 |
| GB2280012A (en) | 1995-01-18 |
| IT8448737A0 (en) | 1984-08-17 |
| GB2280012B (en) | 1995-06-21 |
| DE3430581A1 (en) | 1993-02-25 |
| GB8420375D0 (en) | 1994-09-21 |
| US5322020A (en) | 1994-06-21 |
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