274 results about "Shaped charge" 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.

A shaped charge positioning device may include a shaped charge holder, an initiator holder coupled to the shaped charge holder via a first rotation coupling, and a shaped charge receptacle provided on the shaped charge holder. The shaped charge receptacle may be rotatable around a central longitudinal axis of rotation of the shaped charge positioning device relative to the initiator holder. A perforating gun assembly may include a shaped charge holder provided in a gun housing chamber and rotatable relative to the gun housing. A wellbore tool string may include a first gun housing including a first shaped charge holder rotatably coupled to a second gun housing including a second shaped charge holder. An initiator provided in the first gun housing may be electrically coupled to an initiator provided in the second gun housing.

The utility model provides an underwater explosion efficient shaped charge cutting device based on combined charge, which comprises an underwater annular shaped charge structure and a positioning device, the positioning device is connected with a semi-annular shaped charge structure through a connecting device, and the outer side of the semi-annular shaped charge structure is connected with a detonator; the two positioning devices are arranged on the outer side of the cutting position of the target tubular structure, and the two positioning devices are fixed to each other; the two semi-annular shaped charge structures are arranged on the outer side of the cutting position of the target tubular structure, the two semi-annular shaped charge structures are fixed to each other, and each semi-annular shaped charge structure comprises a plurality of equally-divided cutting units. The cutting end face formed by the underwater explosion cutting device has high fairness, the refinement level of underwater explosion cutting is improved, the underwater explosion cutting device is suitable for cutting tubular structures in any direction and with any structural parameters on the seabed, deep water cutting operation can be achieved, and the underwater explosion cutting device can also be used for cutting structures with rigid body displacement after underwater explosion of flexible bodies such as steel cables, optical cables and electric cables.

Systems and methods for targeted operational disablement that may utilize, for example, UAV-delivered shaped charges coupled to specific features of a target object. A UAV may navigate to, identify, and attach a disabling device to a critical component of a target such as a barrel of a tank main gun, a crew hatch cover, a tank tread, an engine compartment, or a magazine.

The invention relates to the technical field of arc shaped energy-gathered blasting parameter design, and provides an arc shaped energy-gathered blasting parameter design method under a complex crustal stress condition, which comprises the following steps: establishing a double-hole blasting three-dimensional model comprising a rock mass, an arc explosive, an energy-gathered pipe and coupled air, applying a crustal stress boundary condition and carrying out stress initialization; setting material model parameters based on the test data; performing fluid-structure interaction dynamic response numerical simulation on the model by adopting LS-DYNA to obtain stress and strain response caused by blasting; and establishing evaluation indexes based on tensile stress, compressive stress and through crack formation, carrying out sensitivity analysis and optimization adjustment on key blasting parameters such as blast hole spacing, delayed detonation time, explosive loading amount and coupling coefficient, and finally determining an optimal blasting parameter combination in different stress states. The method can effectively meet the blasting operation requirement under the complex ground stress condition, the presplitting quality and the rock mass stability are remarkably improved, and the method has wide engineering application prospects.

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 perforating gun assembly that orients one or more shaped charges within a well includes a housing and an orienting internal assembly configured to be disposed within a longitudinal bore of the housing. The orienting internal assembly may include at least one shaped charge holder or charge tube, a rotation support system, a detonator holder and / or a detonator. The rotation support system may be configured so that the detonator holder and / or detonator rotate together as a whole with the at least one shaped charge holder or charge tube. The rotation support system may include at least one bearing assembly, a plurality of rollers, or combinations thereof. The orienting internal assembly may be configured for gravitational orientation.

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.

The invention provides a delayed detonation functional structure of a shaped charge and blasting series warhead. The delayed detonation functional structure comprises a cylindrical detonation propagation channel arranged between shaped charge and blasting charge; the explosion propagation channel is arranged in the shell, and the explosion suppression layer and the multi-stage explosion propagation sequence are arranged in the explosion propagation channel; the booster sequence sequentially comprises a low-speed delay explosive, a first-stage explosive assistant, an insensitive booster explosive, a second-stage explosive assistant and an initiating explosive. And the explosion-proof layer is used for ensuring that the low-speed delay powder is kept in a stable working state. In the working process, the low-speed delay explosive achieves the delay effect, when energy is spread to the tail, the insensitive booster explosive is detonated through the assistant explosive, detonation is generated, then the initiating explosive is detonated after the energy of the assistant explosive is amplified, finally the blasting charge is detonated through the initiating explosive, and after it is ensured that energy-gathered jet flow is completely formed, the blasting charge is triggered to be detonated. Therefore, the expected delayed blasting effect is achieved. The delay stability is guaranteed through the explosion-proof layer, and combustion delay, detonation conversion and pressure compensation are innovatively integrated into a single system.

A method of using a tracer additive in a wellbore that includes using a perforator device, the perforator device having an at least one shaped charge associated with the tracer additive. The method includes deploying the perforator device into the wellbore in manner whereby the perforator device arrives at a desired location, and sufficiently detonating an explosive material of the shaped charge so that the tracer additive comes into contact with a target formation. The tracer additive has a first composition, and is in powder form.

The invention relates to an underground powerhouse rock-anchored beam construction method and an energy-gathered water pressure blasting device. The energy-gathered water pressure blasting device comprises an energy-gathered cover pipe, an energy-gathered charging pipe and a water filling nozzle plug, a closed water injection space is arranged on the energy-gathered cover tube and the energy-gathered charging tube; water injection holes are respectively formed in the end parts of the energy-gathered cover tube and the energy-gathered charging tube; a fan-shaped area formed by the two sides after the energy-gathering cover pipe and the energy-gathering charging pipe are buckled is a jet flow forming area, and the opening position of the jet flow forming area is a jet flow concentration area. According to the scheme, the energy-gathered water pressure blasting device is used for conducting pre-splitting blasting and smooth blasting on the rock bench layer, the distance between every two adjacent blast holes is increased, the number of drilled holes is reduced, the excavation forming effect of the rock wall beam rock bench layer is improved, and secondary excavation of a rock anchor beam rock bench is achieved on the premise that the forming quality of the rock bench is guaranteed; and compared with a traditional process, a protective layer is omitted, the blasting frequency is reduced, and the construction period of the rock wall beam and the rock bench is effectively shortened.

A perforating gun system. The perforating gun system comprises a gun barrel housing, and a pair of tandem subs threadedly connected to the gun barrel housing at opposing ends. The perforating gun system also includes a rail. The rail defines an elongated frame having a plurality of receptacles, wherein each receptacle is configured to receive a shaped charge. A ballast is connected to each of opposing ends of the rail. Each ballast supports a bearing member which interfaces with a central bore of a respective tandem sub. In this manner, relative rotation is provided between the rail and the first and second tandem subs. A method of orienting shots in a perforating gun assembly is also provided.

A perforating gun is disclosed with shaped charges at a preferential orientation. An example includes a gun body and a charge carrier disposed within the gun body. The charge carrier defines a longitudinal carrier axis and has a plurality of axially-spaced charge mounting locations. A plurality of charges are each pivotally mounted to the charge carrier at one of the respective charge mounting locations about a charge pivot axis transverse to the longitudinal carrier axis. The charges may preferentially align in response to gravity so their orientation remains constant throughout a range of inclination of the wellbore.

The invention provides an activity-considered energy-gathered jet flow pit opening caliber acquisition method, which comprises the following steps of: firstly, constructing a pressure equation for describing a jet flow penetration target plate side, and then calculating a pit opening radial speed of a target material by describing the pressure equation for describing the jet flow penetration target plate side in combination with a relation between a pit opening radial speed and a penetration speed of a target plate; then, assuming that the product of the pressure on the target plate side and the pit digging area is unchanged, and determining the relation of the pressure changing along with the area and the initial pressure on the target plate side; and determining the change relation of the pit digging radius along with time by combining the initial pit digging condition of the target plate side, and finally obtaining the maximum pit digging radius. The method is reasonable in conception, can be widely applied to novel active energy-gathered jet flow, and can efficiently and accurately predict the pit digging radius.

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%.

The invention provides an AMRM-FEM-SPH-based shaped charge jet simulation method, which comprises the following steps of: (1) in the crushing stage of a shaped charge liner, namely in the process from ignition to detonation end of an explosive, re-dividing a grid of a finite element by adopting an AMRM method, when a detonation reaction is completely finished, deleting an explosive unit from a model containing the explosive and the shaped charge liner, after the explosive units are deleted, the AMRM method continues to be used for simulating the jet flow forming process; and (2) converting the failure unit into SPH particles through an FEM-SPH method in combination with a Johnson-Cook failure criterion in the jet stretching and fracture stage of the shaped charge liner. According to the method, the self-adaptive grid technology and a multi-algorithm coupling mechanism are combined in a breakthrough mode, high-precision simulation of the whole process of jet flow forming, stretching and fracture is achieved while the calculation precision is kept, and the accuracy of metal jet flow dynamic behavior prediction is remarkably improved.

A perforating gun includes a gun assembly and a gun barrel. The gun assembly includes a charge tube comprising at least one shaped charge. A pin contact assembly is operably attached to a first end of the charge tube and includes a contact spacer and a through pin configured to provide electrical communication between respective perforating guns. An addressable switch assembly is attached to a second end of the charge tube and comprises an addressable switch and a detonator. The gun assembly is situated within the gun barrel and is configured to self-orient inside the gun barrel.

The invention provides an explosion control device and method for directional shaped charge blasting with low environmental influence, and relates to the technical field of blasting engineering and environmental protection, the device comprises a rock mass characteristic analysis module, a directional shaped charge structure design module and a blasting effect prediction module; the method comprises the steps of conducting geological investigation and rock mass characteristic analysis on a to-be-blasted area, conducting directional shaped charge structure design on the basis of the rock mass characteristic analysis result, conducting blasting effect prediction on the basis of the rock mass characteristic analysis result and the directional shaped charge structure, and if the prediction effect conforms to expectation, constructing a low-environmental-influence control decision, the environmental influence is reduced. By means of rock mass characteristic analysis, directional shaped charge structure design and blasting effect prediction, balance of efficient rock mass breaking and low environmental influence is achieved, the environmental influence can be remarkably reduced, the energy utilization rate is increased, and the method adapts to complex geological conditions and has important engineering application value and social significance.

The invention discloses a comprehensive prevention and control method for gas disasters in gob-side entry retaining working faces, belonging to the technical field of mine gas disaster prevention and control. In the invention, a local fan is installed in the intake main roadway, and the local fan supplies air to the belt conveyor gateway and the intake gateway of the next adjacent working face through an air duct. A regulating air door is installed in the track gateway, and the "W-shaped local pressurization" method is adopted to supply air to the working face, and the air pressure in the stope is adjusted by controlling the parameters of the local fan and the regulating air door. Directional blasting holes are arranged in the track gateway, and cracks parallel to the gob-side entry retaining are formed through directional shaped charge blasting. After roof cutting is completed, the blasting holes are transformed into gas drainage holes for gas drainage from the roof of the gob-side entry retaining. At the same time, before the gob-side entry retaining working face is mined, a cut is made in the floor and a gas drainage pipe is buried. After the gas drainage pipe enters the goaf, the gas in the floor is drained. The method of the invention greatly reduces the gas emission amount in the working face and realizes the effective prevention and control of gas in the gob-side entry retaining.

This invention provides a stress relief blasting method based on the control of diffuse reflection of stress waves. This method involves placing a diffuse reflection sphere at the bottom of the borehole. The sphere's surface contains raised structures, which form a diffuse reflection surface for stress waves. Compared to existing shaped charge stress relief blasting technologies, in this invention, when the explosive detonates inside the borehole, the raised structures on the diffuse reflection sphere at the bottom of the borehole allow the explosive impact to be reflected more evenly to the nearby rock mass in the stress relief section of the borehole. This results in uniform fracturing of the surrounding rock, forming a uniformly fractured zone perpendicular to the borehole axis rather than a primary crack in a specific direction. This significantly reduces the bearing capacity of the surrounding rock near the borehole in the stress relief section, shifting the stress concentration zone away from the tunnel face, reducing the risk of rockburst during deep tunnel excavation, and better ensuring construction safety.

The application discloses a flexible shaped charge cutting device and a magnetic attraction type rapid deployment method, relates to the technical field of shaped charge cutting, and is characterized in that the one side of a movable block is connected with an arc-shaped clamp, cutting pipes are embedded between two adjacent arc-shaped clamps, a storage cavity for explosives and a storage cavity for water are arranged in the cutting pipes, a shaped charge plate is bonded to the side of the cutting pipe close to the storage cavity for explosives, the storage cavity for explosives is filled with cutting explosives, the other side of the rectangular frame is connected with a protective plate, and a plurality of sound absorption holes are arranged on the surface of the protective plate. The bonding of the double-sided adhesive and the fixation of the arc-shaped clamp on the cutting pipe enable the cutting pipe to be closely attached to a wall surface, thereby guaranteeing the stability of cutting. The fixation of the arc-shaped clamp on the cutting pipe prevents the elastic rebound of the cutting pipe and enables the cutting pipe to be stably fixed on a curved wall surface. When cutting and blasting are performed, the high-speed jet flow formed by the shaped charge plate can optimally cut the wall surface, the device has good cutting effect, and is suitable for a wide range of applications.

The invention belongs to the technical field of deep underground target penetration, and particularly relates to an energy gathering / kinetic energy series penetration structural body which comprises a charging shell, the front end of the charging shell is provided with an opening, a shaped charge liner is arranged at the opening of the front end of the charging shell in an adhesive mode, the rear end of the charging shell is fixedly connected with a rear-stage connecting part, and the rear-stage connecting part is fixedly connected with the charging shell. The rear end of the rear-stage connecting part is connected with a rear-stage main projectile body, a charging buffer layer is arranged at the front end of an inner cavity of the rear-stage main projectile body, a rear-stage fuze is installed at the rear end of the rear-stage main projectile body, and the charging shell and the rear-stage main projectile body are both filled with gunpowder. Wide-speed-range penetration is achieved through the series connection structure, the rear-stage connecting part extends into the charging shell to be in threaded connection with the charging shell, the rear-stage connecting part is protected against damage by utilizing three-direction pressure stress generated by explosive detonation, meanwhile, the length of the rear-stage connecting part can be adjusted, the rear-stage connecting part is used for protecting a penetration projectile body structure under the condition of different penetration target-hitting speeds, and the penetration target-hitting speed is improved. And therefore, the purpose of increasing the penetration power is achieved.

The present invention discloses a method for analyzing the vulnerability of concrete piers under the action of shaped charges, specifically, performing structural analysis on the target concrete pier and characterizing the projectile-target intersection conditions; using the residual height of the destroyed concrete to characterize the damage level of the destroyed concrete pier; obtaining residual height data of the shaped charge on the concrete pier under different shaped charges, different attack directions, and different action positions through simulation analysis or experiments; obtaining equal damage curves of different damage levels of the concrete pier; calculating the vulnerable area through a damage probability calculation function; and then judging and selecting appropriate attack conditions. Compared with the prior art, the present invention, based on the characteristics of the concrete pier structure, adopts a method combining experiments and numerical simulations to study the damage of the shaped charge on the concrete pier, obtain the damage criterion for the concrete pier, and construct a vulnerability characterization and evaluation method for the concrete pier under the action of the shaped charge.

The utility model relates to the technical field of blasting, in particular to an energy-gathered blasting device convenient to control blasting orientation, which comprises an energy-gathered pipe and a guide part, the energy-gathered pipe is provided with a first limiting part and a jet hole, and the position of the first limiting part in the circumferential direction of the energy-gathered pipe corresponds to the position of the jet hole in the circumferential direction of the energy-gathered pipe; and the guiding piece is provided with a second limiting part, and the second limiting part can be matched with the first limiting part, so that the guiding piece can limit or drive the energy gathering pipe to rotate around the axis of the energy gathering pipe. The device can effectively prevent the energy gathering pipe from deflecting, is beneficial for ensuring the consistency of the crack direction of the rock after blasting and the original direction, and improves the effect and the precision of blasting cutting outlines.