76results about "Explosive charges" patented technology

Some implementations include an apparatus comprising an explosive material configured to detonate; a liner in contact with the explosive material, the liner configured to, after detonation of the explosive material, form jets to perforate a tubular disposed in a subsurface borehole; a reactive material configured to release energy in response to detonation of the explosive material; and a case in contact with a portion of the reactive material and configured to surround the explosive material, the liner, and the reactive material.

The present disclosure relates to shaped charge. The shaped charge includes an explosive component having a first density and a first mechanical strength. The shaped charge also includes a liner member having a second density and a second mechanical strength. Further, the shaped charge includes an intervening liner member having a third density and a third mechanical strength. The intervening liner member is disposed between the explosive component and the liner member. The intervening liner member has one or both of: the third density being between the first density and the second density; and the third mechanical strength being between the first mechanical strength and the second mechanical strength.

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.

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.

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.

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.

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.

A liner for a shaped charge having integrated tracers. The liner, when the associated shaped charge is detonated, does not create a plug, carrot, or residue in the created perforation tunnel. The liner includes integrated tracers that, after detonation, are scattered into the perforation tunnel and then begin to flow back in formation fluid flow and are identifiable in the flow.

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.

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.

The present invention relates to a wirelessly programmable electronic device for igniting an explosive accessory designed such that the electronic device can be located on the surface of the blasting area and the explosive accessory can be located underground. For this purpose, the invention comprises a printed circuit board inside a casing, said board being powered by batteries placed inside the same casing. The printed circuit board has a controller and a wireless communication module electrically connected thereto which allows it to be connected to and receive delay and activation programming commands by a remote activation device to the controller. Said activation device has an operating system that allows multiple devices of the invention to be programmed due to the assignment of a single identifier to each device. The printed circuit board has a group of resistors and transistors connected thereto for activating and sensing droplets; a horn and LEDs as an audible and visual indicator of the status of the device; an on / off switch; and a crystal oscillator connected to the controller. The board is connected to a conductor cable that is welded at its other end to a secondary board that has an ignition droplet. Said board is located inside the plastic adapter along with the blasting cap and ensures the start of detonation in case of a break in the cable.

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.

An explosive downhole tool includes a housing having an upper housing part on one side of a window section and n lower housing part on an opposite side of the window section. An explosive charge is provided within the housing for cutting or expanding the wall of the tubular. The majority of outer surface of at least one of the upper and lower housing part in cross-section is rounded so as to be devoid of corners. The rounded surface eliminates the presence of sharp comers that may catch on restrictions or protrusions in a wellbore so that the downhole tool is more easily conveyahlc within a wellbore. Another explosive downhole tool includes tins 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.

Disclosed is a holder for stabilizing a linear shaped charge during epoxy curing. The device includes a support with a rectangular midsection having a first and a second end, and a central aperture; a pair of stair-step risers extending down from the first and the second end; and a pair of curved legs extending from the stair-step risers. The pair of curved legs lock the support onto a container. A linear shaped charge is positioned within the central aperture and extends downward into the container where it is stabilized while a curing agent within the container hardens. The support removes the need for constantly checking the alignment of the liner shaped charge while curing and prevents the need for sanding, both of which save considerable time when compared to previous methods. The support is designed with a raised midsection to prevent it from being bonded to the epoxy during the curing process, thereby allowing it to be reused.

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.

The present disclosure relates to shaped charge. The shaped charge includes an explosive component having a first density and a first mechanical strength. The shaped charge also includes a liner member having a second density and a second mechanical strength. Further, the shaped charge includes an intervening liner member having a third density and a third mechanical strength. The intervening liner member is disposed between the explosive component and the liner member. The intervening liner member has one or both of: the third density being between the first density and the second density; and the third mechanical strength being between the first mechanical strength and the second mechanical strength.

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.

Liners (150), fittings (11-22), and spacers (23-25) are provided to assemble the jet (170) units, which work as explosives (110) and detonators (120) to form stand-off distance and air-deck (140) space. The liners (150) release jets (170) and the fittings (11-22) and spacers (23-25) are designed to attach the liner (150) firmly to the explosives (110), inducing the cavity effect. The objective of the present invention is to provide a blasting method using a jet (170) unit to overcome the limits of sympathetic detonation, applying a mechanism that is ideal according to the analysis of observations in blast-hole (100) blasting. The application of jet (170) units for jet (170) detonation in blast-hole (100) blasting overcomes the performance limits of explosives (110) manufacturing and the conceptual limits of detonators (120) functionalities and improves the channel effect, dead pressing, loss of power, and stopping of detonation etc. Particularly, the application of controlled blasting and air-decking can be carried out without restriction while maintaining the safety of the slurry or emulsion explosives (110).

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.

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.

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°.