EP3919854A1 - Dispositif de charge à forme améliorée - Google Patents

Dispositif de charge à forme améliorée Download PDF

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Publication number
EP3919854A1
EP3919854A1 EP20275101.2A EP20275101A EP3919854A1 EP 3919854 A1 EP3919854 A1 EP 3919854A1 EP 20275101 A EP20275101 A EP 20275101A EP 3919854 A1 EP3919854 A1 EP 3919854A1
Authority
EP
European Patent Office
Prior art keywords
perforator
diameter
target
aperture
shaped charge
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.)
Ceased
Application number
EP20275101.2A
Other languages
German (de)
English (en)
Inventor
designation of the inventor has not yet been filed The
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BAE Systems PLC
Original Assignee
BAE Systems PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BAE Systems PLC filed Critical BAE Systems PLC
Priority to EP20275101.2A priority Critical patent/EP3919854A1/fr
Publication of EP3919854A1 publication Critical patent/EP3919854A1/fr
Ceased legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/04—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type
    • F42B12/10—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge
    • F42B12/16—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge in combination with an additional projectile or charge, acting successively on the target
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/22—Elements for controlling or guiding the detonation wave, e.g. tubes
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/11—Perforators; Permeators
    • E21B43/119—Details, e.g. for locating perforating place or direction

Definitions

  • This invention relates to an improved shaped charge perforator device, especially to energy focussing device to channel more energy from a perforator to a target.
  • Shaped charges, perforators, directed energy devices, explosive driven liners have been used to provide a high kinetic energy jet of metal to cut, slice, and penetrate targets.
  • the effective diameter is the longest dimension of the cross section of the aperture and or choke region.
  • the aperture and choke region may be of any shaped cross section, such as, for example any polygonal shape may be employed, preferably circular.
  • the effective diameter will be the diameter of the aperture or choke region.
  • the target may be any target that is to be defeated or damaged by a shaped charge device, such as for example the target may be a vehicle, vessel, craft, or an oil and gas well.
  • the focussing device may further comprise portions of reactive material to provide an energy enhancement device that comprises a choke region co-axial with the perforator.
  • the choke and or channel may be parts of the housing. Parts of the choke and or channel may be substantially inert, such that parts of the choke and channel portions do not comprise a reactive material, whilst other regions comprise the reactive material.
  • the reactive material may be selected from a solid, powder, powder encapsulated in a binder composition and sintered; reactive materials may also be in the form of liquids, gels or even gases, however the stability of fluids at elevated temperatures and/or high pressures, may cause a hazard.
  • the reactive material may be a solid, more preferably a powder.
  • the reactive material may be selected from a metal, metal alloy, intermetallic, high density reactive material (HDRM).
  • HDRM high density reactive material
  • Reactive metals may be those that are pyrophoric and/or react with oxygen, water and moisture in the air, such as, for example powdered metals, metal alloys or mixtures thereof for example aluminium.
  • HDRM compositions are high density materials that when activated, such as by a shock pulse undergo high exothermic reactions, such as rapid thermal and/or chemical reactions with an oxidiser, such as oxygen, in oxygen rich environments to provide large volumes of gas.
  • an oxidiser such as oxygen
  • the reaction products of the reactive material may further react with water.
  • the focussing device may be retrofitted forward of a shaped charge perforator located in a shaped charge delivery system.
  • shaped charge devices such as, for example, shells, mortars, missiles, torpedoes.
  • the use of a focussing device enhances the penetration of the jet, by converging, focussing the detonative output and slower moving fragments to create further damage to the target.
  • a modelled system showed a 40% increase in performance using a focusing device compared to the same system without.
  • Fig 1a shows a shaped charge perforator 1, comprising a shaped charge housing 2, with a copper liner 3, and a high explosive 4, encapsulated by the shaped charge housing 2 and liner 3.
  • the apex of the cone 7 Upon detonation of the high explosive 4 the apex of the cone 7 will be ejected to form a perforating jet 9, which may traverse across an air gap 200, and will follow the centre line 5 and impinge upon the target 6, which may be an oil and gas well completion, or the hull of a vehicle, vessel or craft.
  • the remainder of the cone 8 will progressively collapse inwardly, with the base forming a slug (not shown) which will trail along behind the perforating jet.
  • the high explosive and housing and slower liner parts are products of the detonation blast and will be ejected outwardly and thrown generally forward of the perforator 1, in the direction of the target 6.
  • Figure 1b shows the same arrangement with the air gap being replaced by a volume of water 201.
  • FIG 2 there is provided a simulation of a shaped charge being fired through a column of water in line with Figure 1b .
  • the shaped charge was in the location of 101, which was detonated.
  • the liner formed a perforating jet 109, which passed through a first test plate 115, the column of water 111, and into a series of test plates 114.
  • the slower moving slug 110 trails behind the perforating jet 109.
  • a shaped charge perforator 10 comprising a shaped charge housing 12, with a metallic liner 13, and a high explosive 14, encapsulated by the shaped charge housing 12 and liner 13.
  • a focusing device 21 is located between the perforator 10 and the target 16, which may be the hull of a vessel, wherein there is a body of water 23, between the focussing device 21 and the target 16.
  • the perforator 10 is co-axially aligned with the aperture 17 of the energy focusing device 21.
  • FIG 4 there is provided the same simulation as run in Fig 2 , of a shaped charge being fired through a column of water in line this time with the arrangement as shown in Figure 3 , including the focussing device 221 of the invention.
  • the shaped charge was in the location of 201, which was detonated.
  • the liner formed a perforating jet 209, which passed through the focussing device 221, a first test plate 215, the column of water 211, and into a series of test plates 214.
  • the slower moving slug 210 trails behind the perforating jet 209.
  • the distance of penetration is measured in the test plates 214, and is represented by the distance 212.
  • the penetration distance 212 has been shown to be a 40% increase in length, compared to the exact same set up, without the focussing device being present. All other parameters were fixed. This is a significant increase in penetration depth, which has been caused by the focussing device directing and channelling the detonation products through a reduced diameter aperture to direct further energy to the target 214.
  • a shaped charge perforator 30 comprising a shaped charge housing 32, with a metallic liner 33, and a high explosive 34, encapsulated by the shaped charge housing 32 and liner 33.
  • An energy focussing device 31 is located between the perforator 30 and the target 36, which may be an oil and gas completion or a hull of a ship.
  • the perforator 30 is co-axially aligned with the aperture 37 of the focussing device 31.
  • the apex of the cone 45 Upon detonation of the high explosive 34 the apex of the cone 45 will be ejected to form a perforating jet 39, which will follow the centre line 35 and traverse through the aperture 37 unimpeded, and will impinge upon the target 36.
  • the base of the cone 44 will also collapse inwardly and will form a slug (not shown) which will trail along behind the perforating jet.
  • the detonating high explosive, housing and slower liner parts are products of the detonation blast 40 and will be ejected outwardly and thrown generally forward of the perforator 30, and the detonation products 40 will impinge upon the reduced first diameter 41 of the choke region 38 of the device 31.
  • the apex of the cone Upon detonation of the high explosive 314 the apex of the cone will be ejected to form a perforating jet 319, which will follow the centre line 315 and traverse through the aperture 317 unimpeded, through the gap 323, and will impinge upon the target 316.
  • the base of the cone will also collapse inwardly and will form a slug (not shown) which will trail along behind the perforating jet.
  • the high explosive and housing and slower liner parts are products of the detonation blast 320, 320a will be ejected outwardly and thrown generally forward of the perforator 310, after the perforator jet 319.
  • the detonation products 320a will impinge upon the choke region of the device 318, causing the detonation products 320a to be funnelled, focussed into the device and ejected through the aperture 317 in a more confined, more converged flow of detonation products 322.
  • the converged flow of detonation products 322 impinges on the target 316 to cause further damage.
  • the detonation products 320 will impinge on the reactive material 330, causing a secondary thermal reaction product 322a, which will provide further damage to the target 316.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
EP20275101.2A 2020-06-04 2020-06-04 Dispositif de charge à forme améliorée Ceased EP3919854A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20275101.2A EP3919854A1 (fr) 2020-06-04 2020-06-04 Dispositif de charge à forme améliorée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20275101.2A EP3919854A1 (fr) 2020-06-04 2020-06-04 Dispositif de charge à forme améliorée

Publications (1)

Publication Number Publication Date
EP3919854A1 true EP3919854A1 (fr) 2021-12-08

Family

ID=71069793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20275101.2A Ceased EP3919854A1 (fr) 2020-06-04 2020-06-04 Dispositif de charge à forme améliorée

Country Status (1)

Country Link
EP (1) EP3919854A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1267582B (de) * 1963-07-05 1968-05-02 Dynamit Nobel Ag Vorsatzduese fuer Hohlsprengladungen
US4860655A (en) * 1985-05-22 1989-08-29 Western Atlas International, Inc. Implosion shaped charge perforator
US20160186536A1 (en) * 2013-04-27 2016-06-30 Xi'an Ruitong Energy Technology Co., Ltd Coaxial perforating charge and its perforation method for self-eliminating compacted zone

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1267582B (de) * 1963-07-05 1968-05-02 Dynamit Nobel Ag Vorsatzduese fuer Hohlsprengladungen
US4860655A (en) * 1985-05-22 1989-08-29 Western Atlas International, Inc. Implosion shaped charge perforator
US20160186536A1 (en) * 2013-04-27 2016-06-30 Xi'an Ruitong Energy Technology Co., Ltd Coaxial perforating charge and its perforation method for self-eliminating compacted zone

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