722results about "Blasting cartridges" 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.

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 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 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.

The invention discloses an anti-static flexible fracturing rock breaking pipe based on a conductive oxygenating conduit, which comprises a flexible outer sleeve film with two closed ends and filled with an adsorbing material combustion agent, and further comprises the conductive oxygenating conduit penetrating into the flexible outer sleeve film from the top of the flexible outer sleeve film, an excitation wire and an exhaust pipe, the excitation wire is connected with an electric ignition device, and the electric ignition device is positioned in the flexible outer sleeve film and is in contact with the adsorption material combustion agent; the outer wall of the conductive oxygenation conduit is connected with a conductive unit. The invention further discloses a rock breaking method using the anti-static flexible fracturing rock breaking pipe based on the conductive oxygenating guide pipe, the conductive unit is arranged on the conductive oxygenating guide pipe and makes contact with the ground for conduction, static electricity generated in the filling process of liquid oxygen or pressurized high-purity liquid oxygen can be guided out and eliminated, and the anti-static flexible fracturing rock breaking pipe based on the conductive oxygenating guide pipe can be used for breaking rocks. Static electricity generated in the filling process of liquid oxygen or high-purity liquid oxygen with pressure can be conducted away and eliminated more efficiently, timely and continuously, and the risk of safety accidents caused by the static electricity is greatly reduced.

In general, in one aspect, embodiments relate to an electrical contact that includes a contact plate, a support plate, and three or more bends disposed between the contact plate and the support plate to counteract a force applied to the contact plate when engaged by a contact pin, where the electrical contact is configured to convey a detonating signal through an electrical feedthrough extending through at least a bulkhead of two or more perforating guns.

A method of assembling a primer for a firearm cartridge including the steps of providing a primer cup including a cup base with a circular sidewall extending perpendicularly upward from a perimeter edge thereof, to a rim. Providing an anvil having an anvil base and pressing the anvil into the primer cup with the anvil base spaced apart from the cup base to form a primer gap therebetween. Providing a slurry including a primer composition and a carrier liquid and introducing a controlled volume of the slurry into the primer cup over the anvil. Drying the slurry in the primer cup to remove the liquid carrier and leave a deposit of the primer composition in the primer gap.

A firearm sound suppression system may include, but is not limited to: a tubular body portion defining an entry aperture and an exit aperture; one or more baffles disposed inside the tubular body portion at locations along the length of the tubular body portion, the one or more baffles including: a central aperture, wherein the entry aperture, the one or more baffles, and the exit aperture are co-aligned to form a bore through the firearm sound suppression device.

An ignition device includes an igniter that accommodates an ignition charge to be ignited by energization, and a holder that includes an insertion port for inserting the igniter, and is integrated with the igniter by fitting the igniter from the insertion port and press-fitting a tube body into a press-fitting portion. An end portion of the tube body is fitted into an annular groove formed in a bore, and a labyrinth structure is formed by an inner wall portion, an end surface portion, and an outer wall portion of the end portion, and the annular groove.

A downhole system for conveying an explosive tool within a wellbore and reducing damage to other tools of the downhole system. The downhole system comprises a downhole tool string configured for conveyance within a wellbore, wherein the downhole tool string comprises upper tools, a lower tool comprising an explosive charge, and a sub between the upper tools and the lower tool. The sub is configured to attenuate a shock wave caused by the explosive charge when detonated to thereby reduce damage to the upper tools caused by the shock wave. The sub comprises an axial bore and a plurality of radial bores extending between the axial bore and a space external to the sub.

Progressive ammunition press system, components thereof, and associated methods. The press system may include a press control system integrated with the press. The press may include a case carriage including a case carrier supported by a bearing. Case retainer gates may be provided for retaining cases in the case carrier. A bullet feeding system can be arranged to permit bullet feeding and seating in a single station of the press. A primer feeder can be self-contained, gear-driven, and / or recirculating.

The invention discloses a multi-stage damage warhead and a design method thereof, and belongs to the technical field of military equipment.The multi-stage damage warhead comprises a fuze system, a multi-stage damage warhead module is arranged on one side of the fuze system, the multi-stage damage warhead module comprises a shell, and a first-stage damage unit, a second-stage damage unit and a third-stage damage unit are arranged in the shell; the second-level damage unit is located between the first-level damage unit and the third-level damage unit, explosion-proof layers are arranged between the first-level damage unit and the second-level damage unit and between the second-level damage unit and the third-level damage unit, and first detonating devices are arranged in the centers of the explosion-proof layers. According to the multi-stage damage warhead, the design method thereof and the fuze system, staged triggering of the multi-stage damage module can be achieved, it is ensured that the multi-stage damage module is started according to a preset plan, the multi-stage damage module can select the corresponding damage unit to attack according to different characteristics of a target, and the multi-stage damage warhead is high in safety. Therefore, the hard target and the soft target can be efficiently damaged.

The invention discloses a cutting-free-surface-free blasting device for a complex ore body and a mining method, and relates to the technical field of blasting engineering and mining. The invention provides a blasting device and a mining method using the same in order to solve the problem that a preset free surface is difficult to form on an ore body in complex geology. The blasting device comprises shaped charge units of a specific structure or combination, such as an axial shaped charge unit and an annular / radial shaped charge unit, and part of the units can be integrated into a multi-point detonating structure. According to the mining method, the device is utilized, three-dimensional blast hole arrangement is adopted, energy gathering units with different functions are arranged at specific blast hole positions, and in-hole multi-point detonation and inter-hole millisecond detonation technologies are combined, so that efficient and directional crushing of ore rocks under the condition of no preset free surface is achieved. The device is matched with the method, the difficulty, the cost and the risk of complex ore body mining are reduced, and the efficiency and the safety are improved.

The utility model provides a bamboo joint type oxygen inhalation inner core assembly and a fracturing pipe, relates to the technical field of expansion fracturing, and comprises an inner core, the inner core comprises an infusion tube, liquid outlets are arranged in the circumferential direction of the infusion tube, a first quick connector with a central through hole is arranged at the lower end of the infusion tube, a medium layer is arranged outside the infusion tube, and a second quick connector with a central through hole is arranged outside the medium layer. The dielectric layer is used for absorbing liquid oxygen in the infusion tube; the at least one electronic excitation unit comprises an ignition head and an excitation cartridge bag, the excitation cartridge bag is arranged outside the dielectric layer, and the ignition head is used for igniting the excitation cartridge bag; the inner cores are connected end to end through first quick connectors. The oxygen inhalation inner core assembly is formed by sequentially connecting the multiple inner cores end to end, so that the oxygen inhalation inner core assembly can be flexibly adjusted and assembled in the length direction and the radial direction according to the length and the diameter of the fracturing pipe.

The present invention discloses a design method for a thermal feedback mechanism energy conversion element chip, comprising at least the following steps: Step S1: preparing a substrate layer; Step S2: forming an insulating layer on the substrate layer; Step S3: placing an energy conversion element and at least one thermistor on the insulating layer; Step S4: establishing a parallel electrical connection between the energy conversion element and the thermistor; and Step S5: monolithically integrating the thermistor into a non-polar, two-terminal device. The thermistor is a thermally coupled resistive switch configured to assume a high-resistance or low-resistance state depending on its sensed temperature, with its high-resistance state resistance being much greater than that of the energy conversion element. The present invention eliminates heat accumulation in the energy conversion element chip through the monolithically integrated thermistor, significantly simplifying the complexity of the pyrotechnic device system and improving system reliability.

The present invention is directed toward an addressable ignition stage which produces an output sufficient to detonate a secondary explosive, generally. The present invention comprises addressability and ignition functions that may be used together or separately to incorporate a high-power resistor with a thermally conductive substrate allowing for operation at high temperatures for ignition. The ignition stage is amendable to high volume production, exhibits a high degree of reliability, robustness and operational dependability for use alone or configurable into existing technology.

The invention provides a gas phase change rock breaking device and method based on an aluminothermic reaction, and belongs to the technical field of rock blasting. The rock breaking device comprises a graphite excitation pipe, a liquefied air bag and a sealing cover, the excitation pipe is filled with thermite, and thermite reaction can be carried out to release heat; the liquefied air bag is hermetically sleeved outside the excitation tube, is filled with liquid oxygen or liquid nitrogen and is changed into gas under the action of heat released by the excitation tube, and rock mass fracture is realized by volume expansion. By arranging a multi-section excitation pipe serial connection structure, adopting the industrial graphite excitation pipe, designing a liquid oxygen or liquid nitrogen double-medium system and using the polyethylene degradable material bag body, the safety, the economical efficiency and the environmental adaptability of open-air rock mining are remarkably improved.

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 invention provides a device and method for exciting liquid oxygen phase change blasting through combustion of a non-static flammable adsorbing material, the device comprises a flexible pipe cavity filled with liquid oxygen, a liquid filling pipe, a flammable medium and a grounding wire are arranged in the flexible pipe cavity, and the flexible pipe cavity is composed of a base material layer, a heat insulation layer and an anti-static layer. Static electricity is eliminated by arranging the grounding wire and the anti-static layer; the heat insulation layer is arranged to reduce heat loss; by using the combustible medium prepared from agricultural and forestry wastes, the cost is reduced, and resource reutilization is realized; and through the special design of the liquid filling pipe, the combustible medium quickly and uniformly absorbs liquid oxygen, and the rock breaking efficiency is improved. The problems of electrostatic potential safety hazards, poor heat insulation performance and high combustible medium cost in an existing liquid oxygen blasting technology are solved, and the method has the comprehensive advantages of being safe, efficient, economical and environmentally friendly.

The invention discloses a multi-stage self-triggering type liquid carbon dioxide grading fracturing method. The method comprises the following steps that early-stage preparation work is conducted on a multi-stage self-triggering type fracturing pipe; liquid carbon dioxide is filled into the multi-stage self-triggering type fracturing pipe; the multi-stage self-triggering type fracturing pipe is placed in a drill hole in the target fracturing position and then connected with an exploder; the exploder is started, and the multi-stage self-triggering type fracturing pipes conduct multi-stage fracturing in sequence; and after fracturing is completed, the multi-stage self-triggering type fracturing pipe is recycled for reuse. The grading self-triggering fracturing device is constructed on the basis of the gas transfer rule and the memory alloy material, the liquid carbon dioxide single-point excitation and multi-stage self-triggering grading fracturing method is provided, and the problems that power of a liquid carbon dioxide fracturing single pipe is insufficient, and wiring of multiple pipes is complex are solved.

The invention provides a full-life-cycle management and control system and method for an intelligent primer without detonating of a detonator, and belongs to the technical field of civil explosive materials. The problem that the whole life cycle of an existing primer cannot be effectively managed and controlled due to incomplete management and control means of the existing primer is solved. According to the technical scheme for solving the technical problem, the intelligent primer without detonator detonation comprises an intelligent primer shell, the intelligent primer shell is filled with main charge, and meanwhile, a plasma detonation part is fixedly arranged in the center of the interior of the intelligent primer shell; an auxiliary explosive package and a plasma detonating body are sequentially arranged in the plasma detonating piece from outside to inside; a plasma detonation control module and a high explosive are arranged in the plasma detonation body, and an RFID passive chip and a plasma excitation element are integrated on the plasma detonation control module; the method is applied to full-life-cycle management and control of the intelligent detonating tool for detonating without detonating caps.

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 invention provides a management and control system and method for an intelligent seismic explosive column detonated by plasma, and belongs to the technical field of seismic explosive columns. The problem of low management and control efficiency in links such as production, storage, transportation, sales and warehouse-in and warehouse-out of the existing seismic explosive column is solved; the structure design that the plasma detonating body, the RFID passive chip and the seismic explosive column are integrated is adopted, plasma detonating is conducted on the seismic explosive column on the basis of the plasma shock wave detonation conversion mechanism, the instantaneity of explosion is achieved, and the safety of the seismic explosive column in the production and using process can be effectively improved while the requirement for refined exploration blasting can be met; meanwhile, through cooperation with information interaction of an information tagging device, a reader-writer and an information management and control system, management and control of the whole life cycle of the intelligent seismic explosive column in the use process of production, transportation, storage and blasting can be achieved; the method is applied to seismic exploration blasting operation scenes of oil and gas fields and coal gas fields.

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 initiator head includes a housing piece defining an interior chamber, a circuit board supported in the interior chamber, a line-in terminal coupled to the circuit board, and insulating material filling the interior chamber and covering a top surface of the circuit board for absorbing shocks or vibrations and electrically insulating electronics of the circuit board.

The invention concerns a blasting system (1) configured for explosive material charging in a borehole (3). The system (1) comprises a detonator support device (5) configured to be inserted into the borehole (3) by means of a charging hose (7); a main body (9) of the detonator support device (5) comprises a channel (8) oriented along a main body centre line (CL) extending along the borehole extension during said explosive material charging; an openable cover device (14) covering the channel (8) is configured to come into contact with the charging hose (7) in motion for pushing the main body (9) along the borehole (3), wherein the charging hose (7) in motion is configured to open the openable cover device (14) whilst a stopping arrangement (13) stops the main body (9).The invention also concerns a method of explosive material charging in a borehole (3) by means of the blasting system (1).

The invention discloses a drilling and blasting method tunnel automatic charging robot which comprises a plurality of sets of charging devices, each set of charging device comprises a rubber pipe pushing charging system and a pneumatic conveying charging system which are connected, each rubber pipe pushing charging system comprises a system base, a stock bin mechanism and a cartridge pushing mechanism, and each stock bin mechanism comprises a cartridge storage bin and a charging pipe; the cartridge storage bin is arranged on the sliding bracket and is in sliding connection with the system base; the cartridge storage bin is a cylindrical shell; a round hole in the front end of the charging pipe is connected with the charging pipe; the cartridge pushing mechanism comprises a pushing rubber pipe, the front end of the pushing rubber pipe is used for penetrating into the cartridge storage bin through the round hole, and the cartridge to be loaded into the peripheral hole and the first section of cartridge to be loaded into other holes are pushed to the charging pipe; and the pneumatic conveying charging system is used for blowing the non-first-section cartridge to be charged into the blast hole into the blast hole. The drilling and blasting method tunnel automatic charging robot automatically charges, reduces the number of charging operators at a tunnel face, and ensures that the operators do not directly contact with cartridges.

An initiator includes a pair of electrodes, an insulating member interposed between the pair of electrodes, a cover body covering one end side of the pair of electrodes together with a space around the pair of electrodes, and an explosive with which the space inside the cover body is filled. The pair of electrodes include, in the space, a discharge gap where a dielectric strength is lower than a dielectric strength of a portion where the insulating member is interposed. In this way, provided is a technology that enables ignition without a bridge wire and facilitates manufacture of an initiator.

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.

The utility model provides an upper end cover of a liquid oxygen fracturing pipe suitable for underwater rock mass, and relates to the technical field of expansion fracturing, the upper end cover comprises an end cover body, the upper surface of the end cover body is provided with counter-force petals, the counter-force petals are annularly arranged on the upper surface of the end cover body, and the counter-force petals are arranged on the lower surface of the end cover body. The counter-force petals are arranged on the upper end cover, an acute included angle alpha is formed between the counter-force petals and the axial direction of the end cover body, the counter-force petals are made of semi-rigid materials, the end cover body is used for being detachably connected with a fracturing pipe, and the counter-force petals are arranged on the upper end cover, so that the counter-force petals can be clamped to the inner wall of a blast hole, the buoyancy effect of water on the fracturing pipe is counteracted, and the fracturing effect is improved. And therefore, an operator can mount the fracturing pipe at the bottom of the blast hole.

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.

The utility model discloses a carbon dioxide fracturing device with a flying stopping device, which comprises a fracturing device body which is cylindrical on the whole, a cavity is arranged in the fracturing device body, liquid carbon dioxide is filled in the cavity, and a filling head used for filling the liquid carbon dioxide into the cavity is arranged at the front end of the fracturing device body. A cavity is formed in the fracturing device body, a heating pipe extending into the cavity is arranged on the front side of the fracturing device body, an energy release channel communicated with the rear end of the cavity is formed in the fracturing device body, a constant-pressure shearing piece used for sealing a front end opening of the energy release channel is arranged at the rear end of the cavity, the flying stopping device is arranged at the rear end of the fracturing device body, and a power input end at the front end of the flying stopping device is communicated with the rear end of the energy release channel. The fracturing device is simple and convenient to operate, the working efficiency is greatly improved, the fracturing device and the rock mass are jacked into a whole by utilizing the impact force of high-pressure airflow during blasting, the phenomenon of pipe flying is effectively avoided, and the fracturing device has important significance on the safety of field work and the improvement of the working efficiency and the economic benefit, and can be suitable for larger hole diameter range of blast holes.