41results about "Explosive charges" patented technology

In a MSCJ warhead detonation of the main charge is controlled to provide elevated pressure at multiple locations on the back surface of the liner to cut the liner and to form and propel forward a plurality of SCJs. An initiation system is configured for multi-point initiation of a plurality of booster charges to detonate the main charge to produce a plurality of detonation waves that constructively interfere at multiple locations on the back surface of the liner to form pressure hot spots that cut the liner and to form and propel forward a plurality of SCJs. In different embodiments, the elevated pressures are between 110% and 200% of the detonation pressure at the front of an individual detonation wave. The liner may, for example, include a plurality of recesses such as shallow dimples or deeper conical structures in which case the boosters are aligned to the center of the recessed structures.

Provided herein are shaped-charges having curved walls to provide better controllable and improved liquid jet parameters. The shaped-charge comprises a container having a plurality of curved walls for containing a liquid. One or more explosive charges are immersed in the liquid and a detonator channel positioned through the container wall to controllably detonate the one or more explosive charges and from a wedge-shaped liquid jet. Multipoint initiation is achieved using a number of initiation points; a location of one or more initiation contact points with the geometrically-shaped explosive charges; and / or an initiation timing of each of the initiation contact points, including simultaneous initiation or a sequence of initiations. Also provided are related methods of forming liquid jets and attendant applications, including target disruption.

A linear shaped charged Electro-Explosive (LSCe) Device includes an initiator in direct and intimate contact with an exposed portion of the LSC's main charge. In different configurations, the initiator's package, initiation charge or initiation circuit (acting over a gap) are in direct and intimate contact with the main charge. The LSCe device may be manufactured by connecting a packaged initiator to an opening in the LSC housing through which a portion of the main charge is exposed or by forming the initiator in situ in a receptacle coupled to the housing around the opening. The LSCe device can be used for such applications as thrust or mechanical termination of an airframe, cable cutting or initiation of a LSC.

An explosive downhole tool includes a housing having an upper housing part on one side of a window section and a lower housing part on an opposite side of the window section. An explosive charge is provided within the housing for at least one of cutting and expanding the wall of the tubular. The outer surface of at least one of the upper and lower housing part is rounded so as to be devoid of corners. The rounded surface eliminates the presence of sharp corners that may catch on restrictions or protrusions in a wellbore so that the downhole tool is more easily conveyable within a wellbore. Another explosive downhole tool includes fins extending from the housing. The fins have a height that decreases in a direction away from the housing. The shape of the fins enables the downhole tool to be more easily conveyable within the wellbore.

Well perforation methods of the present disclosure may comprise introducing a perforation bullet into a wellbore comprising a well casing, the wellbore penetrating a subterranean formation; wherein the perforation bullet comprises a housing; an explosive within the housing, the explosive comprising amorphous porous silicon; and an igniter within the housing physically separated from the explosive, the igniter comprising a nitrate; and exposing the explosive to the igniter to induce a detonation to produce a plurality of perforations within the well casing, thereby allowing fluid communication between the subterranean formation and the wellbore.

Well perforation methods of the present disclosure may comprise introducing a perforation bullet into a wellbore comprising a well casing, the wellbore penetrating a subterranean formation; wherein the perforation bullet comprises a housing; an explosive within the housing, the explosive comprising amorphous porous silicon; and an igniter within the housing physically separated from the explosive, the igniter comprising a nitrate; and exposing the explosive to the igniter to induce a detonation to produce a plurality of perforations within the well casing, thereby allowing fluid communication between the subterranean formation and the wellbore.

A liner for a shaped charge, the liner being a generally conical liner, in which the liner is formed from metal or metal alloy and in which the liner has an internal apex angle in 5 the range of approximately 105-110 degrees.

One or more embodiments relates to an explosive breaching tool for steel bar grating including a flexible polymer casing comprising a plurality of explosive charge mountings in a zipper configuration and a plurality of explosive charges positioned in the explosive charge mountings.

The present disclosure relates to a shaped charge. The shaped charge includes an explosive component and a liner member coupled to the explosive component. The explosive component and the liner member emit a perforating jet based on ignition of the explosive component. The liner member has a planar symmetric portion that is planar symmetric along an axial length of the planar symmetric portion relative to planes perpendicular to a direction of the emitted perforating jet.

Disclosed are devices, systems and methods for breaching a structure to create access into or past the structure. In various embodiments, the disclosed breaching devices include specialized casing and mechanisms for their safe and adaptable assembly, packaging, and deployment for a variety of commercial and military applications, including the rescue of trapped individuals in or near a breached structure and / or controlled demolition of the structure. In some aspects, the disclosed breaching devices are modular and customizable based on new software-based design and fabrication control methods for computational ballistic design.

A propellant mechanism for launching a projectile comprises a propellant with a detonation point at which said propellant is initially detonated which is at one end in a forward direction closest to said projectile, such that the detonation proceeds through the propellant in a backwards direction away from the projectile. A reflecting surface is provided away from said projectile for reflecting the detonation into the forward direction towards the projectile.

A container for an explosive shaped charge, the container is a generally cylindrical bottle-like container and is open at an initiation end, within the container a first membrane is provided to define a proximal enclosure in the container for receiving liquid explosive, a second membrane is provided at or towards the end of the container opposite the initiation end and spaced from the first membrane so as to define a distal enclosure in the container for receiving liquid projectile.

System for creating a perforation in an underground formation, comprising: a shaped charge consisting of a casing; an insert and a high-explosive pellet, which is positioned between the housing and the insert, wherein the insert is formed from a mixture of powder materials extending along an inside of the housing from an apex to a bottom part, wherein the mixture of powder material is varied from the apex to the lower part of the insert, and wherein the insert has a continuity that satisfies d(alpha) / dx and d(rho) / dx, where alpha is the half-angle of the insert, rho is the insert density and x is the axial distance along the insert.

The application discloses a method for extruding and forming a shaped charge in a blast hole, and the method comprises the following steps: S1, the on-site device comprises three extruders, a co-extrusion die and three feeding pipes, and the three extruders are connected with the co-extrusion die through the feeding pipes; S2, the shaped charge is composed of explosive, a shell and a shaped charge plate, the explosive, the material for preparing the shell and the material for preparing the shaped charge plate are respectively fed into the three extruders, and then the extruded materials are transported into the co-extrusion die; S3, the extrusion nozzle of the co-extrusion die is inserted into the blast hole, the co-extrusion material is extruded into the blast hole, and the co-extrusion die is withdrawn from the blast hole, when the co-extrusion material in the blast hole reaches a set amount, the co-extrusion die stops working, and the extrusion nozzle of the co-extrusion die is completely withdrawn from the blast hole; and S4, after the co-extrusion material in the blast hole is hardened, the shaped charge is formed. The method is simple and convenient to operate, can quickly form the shaped charge in the blast hole, and realizes the integration and automation of the forming and charging of the shaped charge.

A shaped charge assembly for selectively expanding a wall of a tubular includes a housing comprising an outer surface facing away from the housing and an opposing inner surface facing an interior of the housing. First and second explosive units are each symmetrical about an axis of revolution. Each explosive unit includes an explosive material formed adjacent to a backing plate and includes an exterior surface facing and being exposed to the inner surface of the housing. An aperture extends along the axis from one backing plate to the other backing plate. An explosive detonator is positioned along the axis adjacent to, and externally of, the one backing plate. The first and second explosive units comprise a predetermined amount of explosive sufficient to expand, without puncturing, at least a portion of the wall of the tubular into a protrusion extending outward into an annulus adjacent the wall of the tubular.

Provided herein are mass focusing shaped charges and related methods useful for disrupting targets in either underwater or on land. The mass focusing shaped charges comprise an explosives shell having an explosives shell surface, wherein at least a portion is curved and defines an inner volume configured to contain an inner volume of fluid or a metal liner. A distal body is comprising a SMART material is positioned between the inner volume of fluid and a to-be-disrupted target. A conformable layer of explosives conforms to at least a portion of a surface of the explosives shell, the conformable layer of explosives configured for explosive initiation by a detonator. Upon explosive initiation the inner volume of fluid or metal liner is forcefully ejected to form a fluid or metal jet in a direction through the distal body and toward the target.

The disclosure relates to a shaped charge assembly including a casing and a liner, the liner being a hollow dome forming a hollow space, coaxially arranged around a longitudinal central axis (x) of the shaped charge assembly. The casing and the liner together defines a volume including an explosive. The liner includes an internal surface facing the hollow space and an external surface facing the volume including the explosive. A tangent of the internal surface and a base plane (y) formed at a base end of the liner, the base plane being perpendicular to the longitudinal central axis (x), forms an angle (α) of at least 100°.

An energetics tool is inserted downhole in a wellbore tubular, which has a string of at least two axially separated shaped charges. With this tool N axially separated circumferential dents are created, using a string of only M=(N+1) / 2 axially separated charges. N is an odd number of 3 or higher. Two additional axially separated dents may be created for each additional axially separated shaped charge that is added to the string. For example, by simultaneously detonating two shaped charges, it is possible to create three axially separated dents. By simultaneously detonating three shaped charges that are axially separated from each other, it is possible to create five axially separated dents. The shaped charges are contained in charge housings that are mechanically interconnected with a longitudinal connecting rod. The shaped charges are simultaneously detonated, whereby pressure waves from neighboring shaped charges interact to cause the additional dents.

In a MSCJ warhead detonation of the main charge is controlled to provide elevated pressure at multiple locations on the back surface of the liner to cut the liner and to form and propel forward a plurality of SCJs. An initiation system is configured for multi-point initiation of a plurality of booster charges to detonate the main charge to produce a plurality of detonation waves that constructively interfere at multiple locations on the back surface of the liner to form pressure hot spots that cut the liner and to form and propel forward a plurality of SCJs. In different embodiments, the elevated pressures are between 110% and 200% of the detonation pressure at the front of an individual detonation wave. The liner may, for example, include a plurality of recesses such as shallow dimples or deeper conical structures in which case the boosters are aligned to the center of the recessed structures.

A transportable well completion tool is described. The transportable well completion tool comprises a housing with a charge module disposed within the housing. The charge module comprises explosive charges. An initiator module comprising a detonator is coupled to the housing, and a bulkhead member is disposed within the housing between the initiator module and the charge module. A containment cover is secured to the housing to cover the detonator. The transportable well completion tool can be transported with the containment cover in place, and the containment cover can be removed to connect the well completion tool to a tool string for downhole deployment.

The invention relates to a method for producing at least one part (100a) of a projectile-forming charge (100), such as a housing unit (1) and / or an insert (6), wherein the part is produced by an additive manufacturing process comprising at least the following process steps: - providing a material (3) for the additive construction of the part (100a) and, in particular, a support (2), such as a plate (2); and at least partially melting the material (3); and applying the at least partially melted material (3) to form at least one material web (5) and preferably several material webs (5), in particular building up on the support (2). The invention further comprises a part (100a) produced according to the method, a projectile-forming charge (100) with at least one such part (100a), and an unmanned platform (200) with such a projectile-forming charge (100).

The present disclosure relates to a shaped charge liner. The shaped charge liner includes a first liner portion formed a first material. The first liner portion has an apex and a skirt section that define an interior volume of the first liner portion. The shaped charge liner also includes a second liner portion formed of a second material. The second liner portion is coupled to the first liner portion such that the second liner portion is an edge of the interior volume.

A linear shaped charged Electro-Explosive (LSCe) Device includes an initiator in direct and intimate contact with an exposed portion of the LSC's main charge. In different configurations, the initiator's package, initiation charge or initiation circuit (acting over a gap) are in direct and intimate contact with the main charge. The LSCe device may be manufactured by connecting a packaged initiator to an opening in the LSC housing through which a portion of the main charge is exposed or by forming the initiator in situ in a receptacle coupled to the housing around the opening. The LSCe device can be used for such applications as thrust or mechanical termination of an airframe, cable cutting or initiation of a LSC.

An arming tandem for a perforating gun is provided. The arming tandem includes an internal arming pin that is biased in a retracted position. Detonating the last perforating gun in a gun string forces the arming pin in the immediately adjacent tandem into contact with a grounding plate in the next perforating gun, thereby arming the next perforating gun. The arming pin is biased in the retracted position by a helical compression spring that is contained within a counterbored opening in the arming tandem. An adjacent bulkhead includes a grounding plate that surrounds a contact pin. The grounding plate provides a flat surface for contacting the arming pin and creating a secure connection to ground.

The disclosure relates to a shaped charge assembly (10) comprising a casing (110) and a liner (100), the liner being a hollow dome forming a hollow space, coaxially arranged around a longitudinal central axis (x) of the shaped charge assembly (10). The casing (110) and the liner (100) together defines a volume (130) comprising an explosive. The liner (100) comprises an internal surface (101 ) facing the hollow space and an external surface (102) facing the volume comprising the explosive. A tangent (101a) of the internal surface (101) and a base plane (y) formed at a base end (103) of the liner (100), the base plane being perpendicular to the longitudinal central axis (x), forms an angle (a) of at least 100°.

The invention relates to a method for producing a cartridge case (1), in which method varying hardnesses (H) of the cartridge case (1) are produced in the axial direction (A) of the cartridge case (1). The invention also relates to a cartridge case (1), the hardness (H) of which varies in the axial direction (A). Traceability of the cartridge case is made possible in a simple way by producing the varying hardnesses (H) of the cartridge case (1) at least in one section of the cartridge case (1) in accordance with a hardness code (2).

The present disclosure relates to a shaped charge liner. The shaped charge liner includes a first liner portion formed a first material. The first liner portion has an apex and a skirt section that define an interior volume of the first liner portion. The shaped charge liner also includes a second liner portion formed of a second material. The second liner portion is coupled to the first liner portion such that the second liner portion is an edge of the interior volume.

The present invention relates to the field of explosives for use in demolition in public works. More specifically, it relates to an improved linear shaped charge that allows cutting a target material such as thick blocks (e.g. metal blocks) efficiently in the total length of the charge. In addition, the present invention also relates to a linear cutting charge system for cutting said target material and a method for cutting a target material by means of said linear shaped charge and system thereof.

The disclosure relates to a shaped charge assembly including a casing and a liner, the liner being a hollow dome forming a hollow space, coaxially arranged around a longitudinal central axis (x) of the shaped charge assembly. The casing and the liner together defines a volume including an explosive. The liner includes an internal surface facing the hollow space and an external surface facing the volume including the explosive. A tangent of the internal surface and a base plane (y) formed at a base end of the liner, the base plane being perpendicular to the longitudinal central axis (x), forms an angle (α) of at least 100°.