107results 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.

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.

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.

A dual-mode roll / nod gimballed seeker is configured to provide an unobstructed path for a forming-warhead penetrator. A nod assembly includes first and second seekers separately offset from the roll axis whose FOV overlap within a stand-off range to a target. A roll gimbal rotates the dome and nod assembly around the roll axis. A nod gimbal rotates the nod assembly about a nod axis over a nod FOR that causes the seekers to cross the roll axis and obstruct a path along the roll axis. At terminal, the nod gimbal rotates the nod assembly to a nominal nod angle at which the path is unobstructed to detonate the forming warhead and project a penetrator along the path through the dome. This alleviates the need for a precursor charge and saves precious volume in the airframe, which is of particular import for small diameter warheads, in particular those having a diameter of no more than 8 inches.

A tandem charge for prosecution of underwater targets includes both a precursor charge (PC) and a follow through charge (FTC) oriented within and along an axis of a charge casing with the FTC positioned in front of the precursor charge. The precursor charge includes an explosive charge and a liner configured such that upon detonation of the explosive charge the liner forms an annular explosively formed penetrator (EFP) that is projected along the axis and passes around the FTC to cut a first hole in an outer surface of the target. The FTC is configured to be carried through the first hole in the outer surface of the target by the flow of water therethrough for detonation on the other side of the outer surface of the target, perhaps forming a second hole in an inner surface of the target.

An explosive booster for initiating, and thus causing detonation of, a bulk explosive, includes a hollow body comprising a base member and a sidewall projecting from the base member. The body defines an interior space between the base member and the sidewall for containing a detonable booster formulation in use. A hollow elongate initiator locating formation projects longitudinally into the interior space at least from the base member and defines an initiator channel that is open through the base member, for locating an explosive initiator in initiating proximity relative to a detonable booster formulation contained in the interior space in use. The initiator channel extends longitudinally along a central longitudinal axis thereof that is radially spaced from, and parallel to, a central longitudinal axis along which the interior space longitudinally extends.

A perforating gun assembly is configured for use in unconventional wells, for example in rock formations with low permeability. The perforating gun assembly includes a perforating gun housing and a shaped charge positioned in the perforating gun housing. The shaped charge and the perforating gun housing are configured to improve total target penetration in unconventional wells by 20-100%.

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.

The invention relates to a high density reactive material (HDRM) munition comprising a tail unit, a main body which comprises a payload cavity for receiving a high explosive payload apparatus which comprises a high explosive, a fuze, an ogive portion located between said main body and the fuze, and an explosive train operably connected to said fuze and high explosive, wherein the main body or the explosive payload apparatus comprises an HDRM material, wherein a liner comprising a plurality of apertures is located between the high explosive and HDRM material, such as to allow an explosive output from the high explosive to be more effectively transferred to initiate the HDRM material reaction.

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 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 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.