EP2045567A1 - Charge cumulative - Google Patents

Charge cumulative Download PDF

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Publication number
EP2045567A1
EP2045567A1 EP07019319A EP07019319A EP2045567A1 EP 2045567 A1 EP2045567 A1 EP 2045567A1 EP 07019319 A EP07019319 A EP 07019319A EP 07019319 A EP07019319 A EP 07019319A EP 2045567 A1 EP2045567 A1 EP 2045567A1
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EP
European Patent Office
Prior art keywords
relief
cladding
explosive
cumulative
cumulative charge
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EP07019319A
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German (de)
English (en)
Inventor
Evgeny Pavlovich Germanov
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Individual
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Individual
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Priority to EP07019319A priority Critical patent/EP2045567A1/fr
Publication of EP2045567A1 publication Critical patent/EP2045567A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • F42B1/028—Shaped or hollow charges characterised by the form of the liner

Definitions

  • the invention belongs to the field of explosive devices on the condensed media and can be used for secondary development of layers in oil and gas production, formation of holes and channels in hard materials, explosive cutting of metals and other solid materials, drilling of shot holes when driving in hard rock, breaking large sizes, destroying material objects, performing disturbance work, geophysical and seismic works, construction works and other works.
  • Copper cladding is particularly popular for its efficiency, accessibility and reputation. In their manufacture, particular attention is paid to isotropy of the metal, surface purity, manufacturing accuracy and other technology factors.
  • a cumulative charge having a housing in the form of an open panel.
  • the case contains explosives.
  • the triggering device is located in the closed part of the housing.
  • a centrifugal element which is designed in the form of a round plate. The region adjacent to the edge of the plate is inhomogeneous in a circular direction and has been bent forwards by 5-20 ° with respect to the plane of the central region ( RU No. 2253830 . 2005 ).
  • the deficiencies of this charge include: loss of charge explosive energy as a result of the spontaneous short-wave instability unavoidable to it, instability of acceleration, and the lack of an explicit hole stalk that can form a channel with a nearly cylindrical shape at the meeting point.
  • a cumulative charge having a housing in the form of an open panel.
  • the case contains explosives.
  • the triggering device is located in the closed part of the housing.
  • the cladding is a shell with a density of more than 7 g / cm 3.
  • One or two surfaces have triangular or hexagonal domed elements. The distances between the centers of the domed elements are over 4 average thicknesses of the cladding. The height of the arched elements should not exceed the average thickness of the cladding ( RU no. 2277167 . 2006 ).
  • a cumulative charge having a housing in the form of an open fairing.
  • the housing contains explosive with a cumulative well located in the open part of the housing.
  • the triggering device is located in the closed part of the housing.
  • the fairing adjoins the cumulative fairing.
  • On the surface facing the explosive there is a relief made in the form of steps or strip depressions forming polygons ( RU No. 2303232, published on 20.07.2007 , Prototype).
  • steps can be made with wavy midlines and cuts with midlines without ripples.
  • the wave-like center lines can be stepless or step-shaped (see Fig. 2-4 the said description). Similar centerlines may form in the planes perpendicular to the axis of the fairing as the said strips of relief are directed along the parallels of the fairing.
  • the cladding plays a role of a peculiar spatial modulator by way of the flank of the high pressure wave resulting from an explosion.
  • the standing waves are formed, which reduce the spontaneous vibrations, the dispersion of the energy and as a result increase the puncture capacity of the charge.
  • the deficiency of the charge mentioned is that in its work the scattering of the energy is only slightly reduced, which is associated with the vibrations and with the increase of the initial disturbances, and as a consequence that the efficiency, accuracy and stability of the explosion sputtering only slightly increased can be. And at the same time, it is not possible to ensure the formation of a homogeneous hole handle with an optimal (spherical) configuration.
  • the invention has for its object to develop an effective construction of the cumulative charge, as well as to expand the arsenal of cumulative charges.
  • the technical result that ensures the solution of the problem is to increase the efficiency and breakdown of the charge by eliminating the energy losses associated with the vibrations and increasing the initial disturbances, as well as increasing the accuracy and stability exploding the panel with the formation of a perforated handle with the optimal spherical configuration.
  • the core can form a channel with the cylinder-like shape at the meeting point. This is achieved by the presence of the specially formed optimized unevenness (relief) on the corresponding surfaces of the cladding and by the presence of the unevenness on the surface of the explosive on the side of the housing, which for example is formed by means of a seal. At the same time, the cost of production is reduced and the stability of the results of the application is ensured.
  • the cumulative charge has a housing in the form of an open shell.
  • the explosive is housed with a cumulative well located in the open part of the housing.
  • the triggering device is located in the closed part of the housing.
  • the relief cladding adjoins the cumulative cladding, which is designed such that the center lines of the cuts of the cladding along the generating lines of the relief, as well as the centerlines of the cuts of the cladding with the planes perpendicular to the axis of the cladding, either wavy lines or Represent lines without waves.
  • the wave-like center lines can be made stepless or stepped. In this case, relief is carried out either on the surface of the cladding, which is directed towards the open part of the housing, or on the two surfaces of the cladding.
  • the cladding can be waved if the reliefs on both surfaces match.
  • the depression of the relief on one surface should correspond to the curvature of the relief on the opposite surface of the covering.
  • the wavy center lines of the cuts of the lining along the generating lines of the relief have the lengths of the waves in the range (0.3 ⁇ 0.7) h .
  • L / H have where:
  • h Verkl. average thickness of the cladding along the considered length of the wave, L - wavelength of the especially fast growing initial disturbances of the slab with the strength H from the range (0.5 ⁇ 1.5) h Verkl. made of the same material as the covering, which according to experience is determined by the deepest funnels in the meeting place.
  • the funnels are formed after slinging the plate on the target, which has the distance 20 H ⁇ 50 H to the plate, with the help of the explosive used in the cumulative charge.
  • the initial disturbances of the plate are generated by the wave-like shape or by the relief. In the latter case, the relief is carried out on the surface of the plate adjacent to the body of the explosive.
  • the cladding is executed in the form of the side surface of the truncated cone with the relief in the form of depressions and heels.
  • the distances between the centers of the adjacent recesses and the distances between the centers of the adjacent shoulders, which are calculated along the generatrix of the cone, remain in the range (0.3 ⁇ 0.7) h Verkl. L.
  • the cladding is rolled out of a workpiece in the form of a planar ring sector and the relief is carried out on the workpiece by forging on a flat ring die.
  • the cladding can be made of a sheet of copper or its alloys 0.4 ⁇ 4.0 mm thick, and the L / H ratio increases with increasing the hardness of the sheet material and becomes smaller in the range 11 ⁇ with the reduction of the hardness 15th
  • the surface of the explosive is carried out on the side of the housing with domed or recessed elements.
  • the explosive may fill in the bumps made on the inner surface of the housing.
  • the cumulative charge can be equipped with one or more seals.
  • the seals are located between the explosive and the housing. They partially or completely separate the explosive and the housing of the cargo.
  • the voltage applied to the inner surface seal is made of a softer material as the material of the housing.
  • the gasket which bears against the explosive is perforated, and explosive can fill these holes or depressions in the gasket.
  • the size of the holes or depressions in the seal is optimally (0.5 ⁇ 2) d kr. , and the distance between them - (1 ⁇ 5) d kr. ., where d kr . Critical diameter of the detonation of the explosive used in the charge.
  • a graph of the cumulative charge is shown: in Fig. 1 - General view, in Fig. 2 - Cut the cargo.
  • Fig. 3-10 Possible schemes of execution of the panel relief are shown. For better clarity, the reliefs are shown on the outer surface of the conical casing, which rests against the explosive after installation in the charge. On the inner surface the same relief is executed; It should be emphasized that the relief can be missing on the outer surface.
  • Fig. 11,12 These are the findings of the study for identifying the rapidly growing initial disorders of the shown the explosion hurled plate.
  • Fig. 13-15 Examples of sections of the panel along the generating lines of the relief and the corresponding center lines are shown in white.
  • Fig. 13-15 Examples of sections of the panel along the generating lines of the relief and the corresponding center lines are shown in white.
  • the cumulative charge ( Fig. 1, 2 ) has a housing 1 in the form of an open outer shell, the explosive 2 housed in the housing with a cumulative recess (not shown) which is located in the open part of the housing 1, a triggering device 3, which lies in the closed part of the housing 1, and the cladding 4 adjacent to the cumulative recess with the relief formed by the irregularities 5 associated with the waviness of the shape and thickness of the cladding.
  • On the inside of the housing 1, one or more seals 6 can be accommodated in layers without gaps. You can partially or completely separate the explosive 2 and the housing 1 of the charge.
  • Cladding 4 is here and hereinafter understood to mean a solid which is bounded by two surfaces which has a small thickness compared to its other dimensions, the thickness of the cladding being variable in the general case.
  • performing the relief on one or both surfaces of the panel may alter its strength.
  • the wave cladding can be considered as an isolated case of the relief cladding, if the reliefs on both surfaces coincide.
  • the depression of the relief on one surface corresponds to the curvature of the relief on the opposite surface of the covering ( Fig. 15 ).
  • the term of the generating lines of the relief is used.
  • the term is largely the same as the term generator of the rotating surface.
  • a rotating surface is formed by the rotation of the lines around a fixed straight line called the axis of the rotating surface.
  • This line is called generatrix, as are all lines created by their rotation about the said axis.
  • the generatrix of the rotating surface may be a spatial or planar curve (lying in a plane), for a conical surface it is a straight line.
  • the generating lines of the relief are lines on the surface of the cladding along which the relief is formed. They can be spatial or even. In this case, the generating lines of the reliefs during rotation with respect to the axis of the panel can change their shape and form waves in the circular direction. For turning surfaces, such circles are called parallels and they have no waves of form.
  • the generators of the surfaces and the generating lines of the relief For one and the same turning surface (or its generators) one can form different generating lines of the relief, generally no flat lines.
  • the facing is conical, the generators of the cone - straight lines (are not drawn), and the generators of the relief - helices, which are directed in opposite directions.
  • the generating lines of the relief are lines of crossing the cladding surface with the planes that lie in the axis of the cladding. In the case of turning surfaces, these lines are called meridians.
  • the set of all meridians or parallels represents an uninterrupted skeleton of the turning surface. Through each point of the surface, a parallel and a meridian pass through. It is the same for the relief paneling: the set of all the generating lines of the relief or the set of all the parallels of the relief form the relief surface.
  • the cladding surfaces taking into account the relief are not turning surfaces and in the general case are not even axisymmetric surfaces. In this case, the cladding may have an axis, upon rotation about which the relief is formed on one or two surfaces of the cladding.
  • intersection of the cladding along the line is a part of the surface which lies at the indicated line perpendicular to the cladding at all points of this line, through the front, which faces the open part of the load, and the rear, which bears against the explosive , Surface of the panel is limited.
  • the centerline of the trim cut is an intersecting line that is equally spaced from the inner and outer trim surfaces at all points.
  • Waviness of the line is understood as the existence of alternating deviations of the lines in one direction and another. And length of the wave is the distance between two maximum deviations in one direction.
  • the wavy line can be stepless and step-like.
  • the stripe of the relief is an extended part of the panel along the lines of the relief or along the parallels in which the center lines are equal.
  • the relief strip can be done with undulations or undulations according to the centerlines of the cuts.
  • the relief strips without waves separate waves of the shape and the thickness of the panel, which are directed transversely to the strips.
  • the relief strips without waves are visually clearly discarded on the surface of the panel and illustrate the configuration of the relief; In Fig. 3-10 the stripes of the relief are marked in a light color without waves.
  • the execution of the generating lines of the relief in the form of helical lines is preferred for the charges which operate during the flight with rotation. In doing so, they are to coordinate the direction and extent of the twist of the lines with the direction of rotation of the charge, its longitudinal and rotational speed, and with the speed of the detonation of explosives.
  • Optimum distribution of the distances between the strips of the relief is determined by the material of the panel 4, its thickness in different areas, as well as by the pressure generated by the explosion of the explosive 2 used, which depends on the mixture and density.
  • the best results of breakdown are achieved in the case when the wavy center lines of the cuts of the lining 4 along the generating lines of the relief the lengths of the waves in the range (0.3 ⁇ 0.7) h Verkl. L / H have where h Verkl. - Average thickness of the panel 4 on the considered length of the shaft. Ratio L / H is determined before the calculation of the variant of the embodiment of the relief of the panel 4 according to the method described below.
  • the initial disturbances are carried out with the length of the shaft L.
  • the initial disturbances of the plate are generated by the wave-like shape or by the relief. In the latter case, the relief is carried out on the surface of the plate which bears against the explosive.
  • the simplest method of performing the initial perturbations is to pierce the straight strips (eg by means of milling) on the surface of the plate which will abut the explosive during the explosion.
  • Each plate is set at the front of the explosive of the same explosive used in the cumulative charge of the same average density.
  • the explosion of the explosive device causes the plate to be thrown to the target (eg a steel plate), which lies at a distance of 20 H ⁇ 50 H from the plate.
  • the ratio L / H has been changed in the range 11 ⁇ 15, the ratio L / H increasing with the hardness of the Material enlarged and reduced with their reduction.
  • Detonation properties of explosives are determined by the rate of detonation and the pressure of the detonation products, which depend largely on the composition and density of the explosive.
  • Kinematic properties of the cladding are peculiar to the transmission of mass and momentum caused by the movement of the particles of the cladding at different times: from the beginning of the fall of the detonation wave on the cladding to the full formation of the hole stem of a particular shape with a velocity gradient.
  • FIG. 13-15 Examples of cuts of the panels along the generating lines of the relief are shown in FIG Fig. 13 with a wave - like step - shaped center line and a curve for the cladding with a one - sided relief, in Fig. 14 with a midline without waves but with curve, in Fig. 15 with a wave-like stepped centerline and a curve for the wave fairing with a double-sided relief.
  • N 9
  • N can be any positive integer, and in particularly widespread cases, the condition 5 ⁇ N ⁇ 15 is satisfied.
  • the lining 4 in the form of the side surface of the truncated cone, which is rolled up from a workpiece in the form of a planar ring sector.
  • the relief on the workpiece can be achieved by pressing a flat ring die z. B. in the form of recessed annular areas, which alternate with the areas of constant thickness and width, as in Fig. 16 ,
  • FIGS. 17 and 18 3D images of the conical copper and lead coatings are shown with the relief on the inner surface and with a curve next to the base of the cone. This is the preferred variant of the production. It is also the execution of the panels in the form of other rotary body possible: ball segment, part of the rotary ellipsoid, etc.
  • the same effect can be achieved if the inner surface of the housing 1 is made with curved or recessed elements and the explosive 2 is accommodated in said unevenness during the equipment of the charge.
  • the synergistic effect of forming the uneven surface of the explosive from the side of the housing may be used, and on the inner surface of the housing may place a seal of a softer material as the material of the housing. In this case, the falling on the housing detonation and shock waves are better attenuated.
  • the gasket 6 has a large number of holes or depressions of relatively small diameter, then the explosion due to interference of the shock waves coming from different holes or depressions creates a fog that reduces the waves falling on the housing 1 - "detonation fog".
  • Optimal size of the holes or pits is determined by the detonability of the explosive used.
  • the measure for this is the critical diameter of the detonation d kr. - the smallest diameter of the cylindrical charge at which the detonation spreads despite the scattering of the substance from the zone of reaction.
  • Detonation ability of the explosive is the greater, the smaller the critical diameter d ⁇ p. is.
  • d ⁇ p. usually a few millimeters.
  • FIGS. 23 and 24 Plane disassemblies (workpieces) of the gaskets are shown with the angle of the ring sector 108 ° with different perforations. When rolling up, they form seals 6 with the angle of the truncated cone 35 °.
  • Covering the cumulative charge is a working body with the help of which the energy of the explosive is transferred to the executing work.
  • the greatest interest is in thin metal cladding, because during the spin the transfer of the momentum of detonation products to the cladding is better, and also because of the low surface density, the high spin speeds are achieved.
  • the density of the generating stem (density of the metal used) is relatively high for an efficient breakdown of an obstacle.
  • the first option assumes that the hard material of the cladding is immediately transformed into the liquid under the action of a large differential pressure, and the model of the ideal incompressible liquid is used.
  • the other option despite the fact that the difference in pressure is much greater than the plastic limit of the material, it is implicitly assumed that the material does not undergo radical flow changes, and the numerical methods based on the behavior of the material are used Material based on normal conditions.
  • the model of an absolutely non-impact joint is used. Ie. it is believed that upon collision of the parts of the panel, the particles stick together, forming the stems, rings or cores.
  • the cladding is placed in a channel with a corresponding shape, i. H. by a deformable piston.
  • ⁇ area density of facing, n - vector of the unitary norm, directed in the direction of pressure deficiency.
  • the symbol ⁇ means a covariant derivative along the surface.
  • Pressure p 0 is constant in the following.
  • a 0 ⁇ means contravariant initial components of the surface area tensor used with the coefficient c 2 , such as the components of the specific tensor of the elastic constants.
  • ⁇ p 0 /
  • Dimension of the variable ⁇ is equal to the dimension t 2 .
  • This complex equation represents the system of two hyperbolic equations, but even with a constant value c it has a strong variance, which characterizes an unusual behavior of solutions with different initials.
  • the wavelength corresponding to l res ⁇ 4 ⁇ h 0th At k ⁇ 0, the growth rate of the amplitude is reduced to zero.
  • the qualitative behavior of the relief cladding in the explosion sputtering is characterized by the wavelength of the initial perturbations.
  • the initial disorders are due to the shape and the relief of the panel.
  • the process of developing the shortwave takes place in the vibrational state. It should be considered that, for the theory to apply, the real wavelength should be much larger than the characterizing thickness of the cladding, limiting the spectrum of wavelengths from below.
  • the perturbations grow. This area, in turn, has the resonant length of the wave, which is twice the critical length, with the largest increment of growth. As the wavelength increases further, the increment goes down to zero.
  • the inertial force acts, which, roughly speaking, presses the front (in the spin direction) surface of the casing, but makes its rear surface unstable.
  • the back surface was originally on the explosives. From the rear surface, essential parts of the cladding material may separate.
  • the initial disturbances are carried out on the explosive-applied surface. This is necessary for determining the resonance length of the shaft. The length is twice the critical length.
  • the corrugation of the cladding should be formed by the relief on the front side of the cladding.
  • the proposed cumulative load works as follows.
  • the detripping device 3 When the tripping device 3 is triggered, the detonation of the explosive 2 and the explosion of the relief cladding 4 takes place.
  • the relief on the surface which is directed towards the open part of the housing, which is there to produce the shaft centerlines in corresponding sections of the cladding That is, after detonation of the explosive, the deformation conditions favorable for reducing the lability of the cladding and, in the case of generating the wavelength near the critical wavelength, are conducive to possible elimination of the vibrations and growth of the clutter. This reduces the energy dissipation associated with the vibrations and growth of spontaneous disturbances.
  • the panel skid becomes more accurate, the punching stem of the optimum shape with calculated parameters is formed, the efficiency of the charge and the stability of their work increase.
  • the hole handle makes the hole (perforation) z. B. in the cladding column of the bore.
  • the housing 1 of the load which is usually made of steel or other solid material, is used for the safe installation of the charge in appropriate facility adjacent to the target (eg in the housing of the hole punch in the bore) and for maintaining the explosion pressure.
  • the seals 6 reduce the explosion effect on the housing 1 of the charge, which leads to an increase in the energy directed to the spinning of the panel 4.
  • a real possibility is used, under the optimal process of development of the initial faults of the panel 4 high acceleration caused by the explosion.
  • the shape of the panel 4 is consistent with the solution of the task of spinning and acceleration of the first dormant panel.
  • the material of the original cladding 4 flows into a homogeneous weak gradient (velocity gradient is meant) perforated handle having an optimum spherical shape with high momentum.
  • said stem has good flow characteristics, but this advantage is usually not used because of the limited conditions of use of the cumulative charges.
  • the proposed cumulative charge has the following advantages.
  • the relief panels 4 can be made of sheet metal (tape) using a simple mechanical Machining (cutting, pressing, folding and finishing) are performed.
  • the smooth panels demand more complicated operations (rollers, tracks, etc.).
  • the good results of the work of the proposed charge are achieved without using the expensive metals and alloys.
  • the increase in puncture resistance and stability is achieved by eliminating the lability of pressing the cladding, reducing energy dissipation, and increasing the impulse without increasing the cost of the cladding material.
  • the relief cladding can be calculated and executed in such a way that no thin unstable jet and no slow pestle arise when it is pressed off.
  • the declared cumulative charge can be produced in series under conditions of industrial production using existing equipment and using modern production technology.
  • the technological means of implementing the invention are relatively diverse at the present state of production development.
  • Example 1 For comparing the efficiency and stability of the work of the cumulative charges with the reliefs executed on different sides of the panels are, a batch of cumulative charges was made. Each load had a steel case with a diameter of 48 mm and a length of 60 mm. Case had the shape of the shape in Fig. 1 is equal to. In the housing 24 g of the explosive based on the Hexogens were housed, which was phlegmatized with the average density of 1.6 g / cm 3 . The triggering system consisted of an electric detonator, a detonating cord attached to it and an intermediate detonator in the form of the pressed crystal hexogen.
  • Each panel thus produced was compressed into the cumulative depression at the angle 39 °.
  • the recess was previously made in the explosive by means of pressing from the side of the open part of the housing.
  • On the inner wall of the cargo housing before compressing explosive was a gasket, which consists of a copper blank with the thickness 0.8 mm according to the sketch Fig. 23 was rolled, housed in the form of the side surface of the truncated cone with the angle 35 °.
  • the target consisted (from bottom to top) of a steel column with the diameter 70 mm, a steel sleeve filled with water, with the height 12.5 mm and a steel plate with the thickness 5 mm.
  • the charge was used at the mentioned target with the focal distance 9 mm.
  • Such tests are used for adjusting the hole charges carried out for a secondary development of the oil and gas layers, or the said charges belong to the hole type "Big Hole”.
  • the relief lies on the outside of the cladding and, after being pressed into the cumulative depression, the relief is in contact with this depression, then the low values and large scatter of the results of the rupture are observed. If the relief lies on the inside of the cladding and, after being pressed in, the relief is directed towards the open part of the housing of the load, then a high efficiency and stability of the work of the charges is observed.
  • Example 3 For the punching of the steel plate with the thickness 300 mm, the charges with the outside diameter 48 mm and height 80 mm were produced. Loading charge - 35 g of phlegmatized hexogen.
  • the panels were made of a copper sheet 0.6 mm thick in the form of the side surface of the truncated cone with the cone angle 19 °, diameter of the base was 40 mm, diameter of the upper part - 21 mm, height - 58 mm, mass - 28.5 g.
  • Example 4 In performing the disturbance work, the cumulative charges were used whose shape was the same as the charges described in Example 1.
  • the charges contained 50 g of phlegmatized octogen, two gaskets (lead seal on the casing and blasted copper gaskets on the explosive) and 0.8 thick copper mantels, which had the shape of a 120 degree ball segment, with the relief on the inside, that on the open part the housing of the cladding surface is directed. Diameter of the cladding base was 50 mm, length of the shaft of the relief - about 5 mm.
  • Examples 5 The charges, which are equal to the charges described in Example 4, were used for the separation of the steel plates.
  • the loads were placed close to each other on the cutting lines and simultaneously triggered by means of a detonating fuse. Cylindrical holes were made in the plates with the diameter close to the caliber of the charges. Between the holes went out strong Ausplatzvone. As a result, the steel plates were separated at the indicated lines.
  • Example 6 In the course of the construction work, a load of the 1.5 mm thick copper sheath was used in the form of a part of the ellipsoid of revolution. Explosive mass was 300 g, diameter of the cladding base - 100 mm, length of the shaft of the relief - about 10 mm. After the explosion of the mentioned charge in the rock, a shot hole with a diameter of approx. 50 mm and with a depth of more than 1 m was formed, in which the charge of the explosive for the execution of the blasting work for ejection was accommodated.
  • the efficiency and the breakdown capability of the charge are increased by the elimination of the energy losses associated with the vibrations and with the increase in the initial disturbances, it is also the accuracy and stability of the explosion of the cladding with the formation of a homogeneous hole handle with the optimal spherical Configuration increased. This is achieved by the presence of the specially created optimized unevenness (relief) on the corresponding surfaces of the cladding and by the presence of the unevenness on the surface of the explosive, which is formed for example by means of a seal. At the same time, the cost of production is reduced and the stability of the results of the application is ensured.

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  • General Engineering & Computer Science (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
EP07019319A 2007-10-02 2007-10-02 Charge cumulative Withdrawn EP2045567A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU191145U1 (ru) * 2019-05-20 2019-07-25 Федеральное Государственное Бюджетное Образовательное Учреждение Высшего Образования "Новосибирский Государственный Технический Университет" Кумулятивный заряд

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2629325A (en) * 1950-05-20 1953-02-24 William G Sweetman Jet type perforating unit
GB2290855A (en) * 1994-06-30 1996-01-10 Western Atlas Int Inc Shaped charge with simultaneous multi-point initiation of explosives
US5792977A (en) * 1997-06-13 1998-08-11 Western Atlas International, Inc. High performance composite shaped charge
EP1345003A2 (fr) * 2002-03-12 2003-09-17 Halliburton Energy Services, Inc. Revêtement de charge creuse avec revêtement précurseur
RU2303232C2 (ru) * 2005-09-27 2007-07-20 Общество с ограниченной ответственностью "ПерфоЛинк" Кумулятивный заряд

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2629325A (en) * 1950-05-20 1953-02-24 William G Sweetman Jet type perforating unit
GB2290855A (en) * 1994-06-30 1996-01-10 Western Atlas Int Inc Shaped charge with simultaneous multi-point initiation of explosives
US5792977A (en) * 1997-06-13 1998-08-11 Western Atlas International, Inc. High performance composite shaped charge
EP1345003A2 (fr) * 2002-03-12 2003-09-17 Halliburton Energy Services, Inc. Revêtement de charge creuse avec revêtement précurseur
RU2303232C2 (ru) * 2005-09-27 2007-07-20 Общество с ограниченной ответственностью "ПерфоЛинк" Кумулятивный заряд

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RU191145U1 (ru) * 2019-05-20 2019-07-25 Федеральное Государственное Бюджетное Образовательное Учреждение Высшего Образования "Новосибирский Государственный Технический Университет" Кумулятивный заряд

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