63results about How to "Reliable detonation" patented technology

The invention discloses a detonation energization explosion-propagating device for a perforating gun string, which comprises a body, an energizer, two detonating cords, two explosion-propagating tubes and a centralizing ring, wherein the energizer is an ignition explosion-expanding tube consisting of a tube body, an ignition charge and explosion-expanding tube. The energizer is positioned in the middle part of the body and is centralized by the centralizing ring, and two sides of the energizer are successively provided with the explosion-propagating tubes and the detonating cords which are centralized by two centralizing sleeves. When the perforating gun string is formed, two ends of the body are connected with an upper perforating gun and a lower perforating gun respectively, and the other ends of the two detonating cords are connected with perforating bullets in the corresponding perforating guns respectively. The detonation energization explosion-propagating device is assembled between each two sections of the perforating guns and interlayer guns of the perforating gun string for oil-gas wells, solves the problems of reliable perforations and reliable explosion propagations of the interlayer guns of the prior perforating gun string, can well avoid rework accidents such as incomplete perforations, gun blockages and the like caused by insufficient self-energies of explosion-propagating materials and the losses and the attenuation of detonation wave energies in the transmission process, increases the reliability of the perforations, and improves the safety of perforation completion.

The invention discloses a coding detonating control device. The device comprises a ground system and an underground system which are connected through a cable; the ground system comprises a computer and a ground monitoring instrument; the ground monitoring instrument is a special hardware device for monitoring the state of perforators at all levels as well as selecting and perforating, in order to build reliable communication while working power is supplied to the underground system; a control instruction from a computer is converted into a coding signal to be loaded to a power wire to be sent to the underground system, and then an information code fed back from the underground system is received and compiled and then sent to the computer for analyzing and processing; the underground system comprises coding controllers which are mounted in different perforators; the coding controllers receive instruction signals from the level-based perforating monitoring instrument, actuating the corresponding detection and ignition and other operations, detecting the switching state of self, coding the detection result as well as returning to the ground system; the output end is able to reliably detonate a magnetic electric detonator and an EFI detonator.

The invention discloses a pressure coding detonating device and method. The pressure coding detonating device comprises a pressure sensor, a temperature sensor, a signal processing circuit, a single-chip system, a power supply circuit and a detonating circuit, wherein the pressure sensor and the temperature sensor are connected with the signal processing circuit respectively; the signal processing circuit and the power supply circuit are connected with the input end of the single-chip system; the detonating circuit is connected to the output end of the single-chip system; through arrangement of the pressure sensor, the temperature sensor and the single-chip system, the pressure sensor and the temperature sensor detect pressure and temperature signals of a perforation position of an oil-gas well in real time, and sends the acquired and amplified pressure signal and temperature signal to the single-chip system; the single-chip system compares a received pressure signal with a preset coding command of a preset perforating bullet, sends a detonating command to the detonating circuit when the pressure signal in the well is detected to be in accordance with the preset coding command and controls the detonating circuit to detonate the perforating bullet. Therefore, high-safety controllable detonation is realized.

A disturbance device used for combustion stability qualification tests is suitable for the dynamic combustion stability qualification of a cryogenic liquid rocket engine. The disturbance device is of a combined structure composed of a composite heat insulation outer shell, a non-metal middle layer and a metal inner shell. The disturbance device can meet the temperature requirements of high-low temperature extreme work environment and achieve reliable detonation in the range of 35K-3600K; before detonation, the disturbance device needs to endure the low temperature and low pressure environment (35K, 0.5MPa) for 3s and then endure the high temperature environment (3600k, 10MPa) for 5s, and the total work time is about 10s. The disturbance device can further meet the requirements of vibration environment, and the structure is not damaged under the comprehensive vibration acceleration of about 200g; and it is guaranteed that explosion debris does not cause damage to the copper alloy inner wall of a test article.

The invention relates to a multistep pressure coding detonating method and device for well perforation. The method comprises the following steps: detecting pressure and temperature signals of a position of well perforation through a pressure sensor and a temperature sensor in real time, comparing the temperature signal with a temperature set by a temperature switch, and starting detonating signal identification after the temperature signal reaches or exceeds the temperature set by the temperature switch; comparing the received pressure signal with a pre-stored and set starting pressure command and completing starting pressure command identification; comparing a subsequently received pressure signal with a pre-stored and set pressure coding command, comparing the received pressure signal with a preset positive coding command and a preset negative coding command, and when a pressure signal detected underground conforms to the set positive coding command, sending a positive acting command to an acting circuit and controlling the acting circuit to output a positive-polarity voltage to detonate a perforating bullet, thereby realizing primary perforating gun detonation; by means of the same principle, negative detonating perforation can be realized.

The invention provides combustible glue used for destroying unexploded ordnance and a preparation method and application thereof. The combustible glue is prepared through the following steps that Al powder and Fe3O4 powder are evenly mixed to obtain Al/ Fe3O4 mixed powder; lac is dissolved in absolute ethyl alcohol to obtain a lac absolute ethyl alcohol solution with the mass concentration being 5%-6%; the Al/ Fe3O4 mixed powder is added into the lac absolute ethyl alcohol solution, and the Al/ Fe3O4 mixed powder and the absolute ethyl alcohol solution are stirred to be evenly mixed; glass fiber powder is added and stirred to be evenly mixed; and expandable graphite is added and stirred to be evenly mixed to obtain the combustible glue. The mass ratio of the Al powder to the Fe3O4 powder is 7-8 to 15. The massic volume ratio of the Al/ Fe3O4 mixed powder to the lac absolute ethyl alcohol solution is 1g to 2-3 mL. The adding amount of the glass fiber powder is 1%-3% of the Al/ Fe3O4 mixed powder by mass. The adding amount of the expandable graphite is 1%-3% of the Al/ Fe3O4 mixed powder by mass. The combustible glue is low in combustion speed, large in combustion heat output and long in combustion duration, and can heat explosives in the unexploded ordnance once being ignited, and it can be ensured that the explosives in the unexploded ordnance are reliably detonated.

An explosive separation joint system having an expandable tube containing a mild detonating fuse (MDF) in separable portions of the joint. The MDF extends into a detonation manifold at a first port, an end of the MDF having booster bonded thereto. An external initiating ordnance transfer line enters the manifold at an initiating ordnance (IO) port, has an IO end tip and provides a detonation impulse train where each detonating component is axially aligned within a passageway with the next detonating component. In embodiments, particular detonating components of the detonation train are fixed in place where other detonating components are movable. Each detonating component that is not in direct contact with a preceding detonating component in the detonation train is in direct linear access.

The invention discloses a combination type water-filling energy accumulation e epicentre device for seismic exploration, comprising a epicenter unit; the epicenter unit comprises a column-shaped housing, an explosive chamber and an energy accumulation cavity; two ends of the column-shaped housing are provided with threads; one end of the column-shaped housing is connected to a filling chamber filled with the water; the other end of the column-shaped housing is connected to the energy accumulation cavity; an explosive chamber is arranged between the energy accumulation cavity and the filling chamber; the center of the filling chamber is provided with a through hole; and the through hole is internally provided with a denoting cord connected to a detonator which is connected to the explosive of the explosive chamber. The invention is a combination type water filling energy accumulation epicenter device for detecting earthquake, which can independently use one epicenter unit and can also use a plurality of epicentre units to construct a multi-stage energy accumulation structure. The invention can perform multi-stage assembling on site and configures the detonation structure, which effectively improves the down-transmission energy and resolution ratio, reduces the extra high frequency seismic wave energy and the explosive hazard, guarantees the accuracy explosion rate of the epicentre, and can be adapted to the earthquake detection in the complicated terrain.

The invention discloses a liquid explosive with a small critical diameter and medium detonation velocity and a preparation technology thereof. The liquid explosive is composed of the following components in percentage by weight: 60 to 90% of nitromethane, 3 to 10% of sensitizing agent, 5 to 20% of performance buffering agent, and 2 to 10% of complexing agent. The liquid explosive has the following characteristics: (1) the mechanical sensitiveness is low, and the operation is safe; (2) the detonation is reliable, the critical diameter is small, and the energy is proper; (3) the fluidity is good, and thus the liquid explosive is suitable for long distance pumping; (4) the whole system is in a weak alkali state and is non-corrosive to metals; (5) the preparation method is simple, the price is low, and the liquid explosive can be mixed onsite before using. The liquid explosive is applied to oil and gas exploitation and is especially suitable for oil and gas exploitation in low permeable hard rock areas.

The invention discloses an artificial hail-suppression rain-enhancement projectile with a rain-enhancement catalyst distributed away from a fuse output end. The artificial hail-suppression rain-enhancement projectile comprises a fuse body, a fuse booster, a rain-enhancement catalyst grain or cartridge bag, an explosive loader and a projectile body, wherein the fuse body is positioned on the head part of the projectile, and the bottom of the fuse is provided with the booster; the explosive loader in the projectile is tightly adjacent to the output end of the fuse booster; the rain-enhancement catalyst, for example silver iodide, does not occupy the center of the projectile explosive-loading input end tightly adjacent to the output end of the fuse booster and returns to the explosive loader; the rain-enhancement catalyst is distributed along the peripheral edge of the input end of the explosive loader or the explosive loader is divided into upper and lower explosive grain sections; therain-enhancement catalyst is distributed in a center blind hole in the upper end surface of the lower explosive grain; and a supporting plate is arranged at an interface, above the rain-enhancement catalyst, of the two explosive grain sections for guaranteeing emitting strength and emitting safety of the upper explosive grain. The position of the rain-enhancement catalyst grain or cartridge bag isreasonably arranged, so that reliable explosion, on projectile explosive loader, of the booster is facilitated.

The invention provides a new-type energy-saving and environment-friendly delay electric detonator and a production process thereof and relates to a delay electric detonator and a production process thereof. The new-type energy-saving and environment-friendly delay electric detonator comprises a detonator shell, the lower end of the interior of the detonator shell is provided with a high explosive, and the interior of the detonator shell and the upper end of the high explosive are provided with delay bodies; the upper opening of the interior of the detonator shell is fixedly provided with a bayonet stopper, an ignition device is arranged between the bayonet stopper and the delay bodies, and the ignition device comprises a leg wire and a gunpowder head, and the gunpowder is connected with the leg wire and penetrates out of the detonator shell. A cylinder cavity is reserved on the centre of the high explosive, the delay body comprises a delay pipe body and delay powder, and the upper end of the delay pipe body is provided with a spiral cavity; the lower end of the delay pipe body is provided with a conical cavity, the conical cavity and the spiral cavity are communicated with the cylinder cavity, the cylinder cavity and the conical cavity are internally filled with initiating explosive, and the spiral cavity is internally filled with the delay powder.

The invention discloses excitation powder of a flying plate type electric detonator without detonating powder, relating to a detonator explosive. The invention aims to provide excitation powder which can be loaded under a certain pressure without obviously influencing the sensitivity, can be compacted to avoid powder leakage and can ensure the detonator to be reliably ignited. The technical scheme of the invention is as follows: the excitation powder comprises the following components in parts by weight: 3-7 parts of penthrite, 1-2 parts of potassium chlorate and 0-1 part of expanded perlite, wherein 350-450 milliliters of adhesive are added to every one kilogram of the mixed components; the apparent density of the penthrite is 0.7-0.9g/cm<3>; the purity of the potassium chlorate is no less than 90%; the adhesive is polyvinyl alcohol resin of which the concentration is 3-7%; and the penthrite is a coarse penthrite of which the particle size is 20-60 meshes or a mixture containing 50-70% of 20-60-mesh penthrite and 30-50% of 100-300-mesh penthrite. The invention is mainly used for producing the excitation powder of an electric detonator.

The invention discloses an inertia-start-type detonating device and belongs to the technical field of detonation. The inertia-start-type detonating device comprises an explosion transmission component, inertia cylinders, a driving spring, inertia springs, a state switch, an electric detonator, a detonating component, a body, a press nut, a big press nut, steel balls and screws. At ordinary times,the explosion transmission component is locked at the position, far away from the electric detonator by the two waysof the inertia cylinders and the inertia springs; meanwhile, the state switch provides short circuit protection for the electric detonator and has a state indication function, the explosion transmission component cannot be detonated, even though the electric detonator acts accidentally; after the two ways of the inertia cylinders and the inertia springs move in place under continuous inertia overload action, the transmission component is unlocked, the driving spring drives the explosion transmission component to move to the alignment state with the electric detonator, the state switch is switched and the short circuit protection for the electric detonator is relieved; the explosion transmission component can be detonated by action of any way of the electric detonator, and further, the detonating component is detonated. The inertia-start-type detonating device has the advantages of being capable of not relying on external power sources or electric orders, simple in system, high in safety, reliable in function, capable of achieving state feedback and the like.

The invention particularly relates to an injected water-resistant booster explosive used for a seismic explosive column, and belongs to the technical field of explosive materials. The injected water-resistant booster explosive used for the seismic explosive column is safe, high in efficiency and low in cost. According to the technical scheme, the injected water-resistant booster explosive used forthe seismic explosive column comprises a shell, a detonator base, a main charge and an initiation system, wherein the shell is a cylindrical structure, one end of the shell is open, and the other endof the shell is provided with a detonator base insertion hole; the detonator base is arranged in the detonator base insertion hole in a matched mode, and the main charge and the initiation system areplaced in a cavity formed by the shell and the detonator base; and the initiation system is of a cavity structure, one end of the initiation system is closed, the other end of the initiation system is provided with an explosive injection hole, and an initiating explosive is arranged in the cavity structure of the initiation system. According to the injected water-resistant booster explosive usedfor the seismic explosive column, cheap expired explosives are used as the main charge of the injected water-resistant booster explosive, so that the product cost is reduced; and the injection processis adopted, so that the safety of the booster explosive is ensured.

The invention discloses an intelligent selective trigger switch which comprises a power supply anti-reverse connection module, an initiation processing module, a rear-stage power supply control module, a communication module, a power supply module and a processor module. The power supply anti-reverse connection module is used for preventing two power supply input lines of the intelligent selectivetrigger switch from reverse connection; the initiation processing module is used for completing the initiation processing process of a detonator; the rear-stage power supply control module is used for controlling the voltage of all stages of selective trigger switches to be the same; the communication module is used for realizing the bidirectional communication function between the intelligent selective trigger switch and an initiator; the power supply module is used for reducing the input voltage of the intelligent selective trigger switch to a voltage value at which each module can stably work; and the processor module is used for controlling and/or receiving instruction information of each module. The intelligent selective trigger switch realizes bidirectional communication between theselective trigger switch and the initiator, and has the advantages of gradual power supply, serial network and bus short circuit fault prevention. The invention also discloses an initiation system applying the intelligent selective trigger switch.

The invention provides a contact fuse with a redundant design of a sensor. The contact fuse comprises a safety control assembly, a commutation triggering assembly, a detonation assembly, a sensor and signal processing assembly, an input/output port and a power assembly, wherein the safety control assembly is electrically connected with the input/output port, the sensor and signal processing assembly and the commutation triggering assembly; the sensor and signal processing assembly is electrically connected with the commutation triggering assembly; the commutation triggering assembly is further electrically connected with the detonation assembly; and the power assembly is connected with all the assemblies. According to the contact fuse, a contact switch and a piezoelectric sensor are comprehensively applied to generating a fuse detonation signal which is transmitted to the commutation triggering assembly in the fuse, and an energy storage capacitor in the control assembly outputs energy to an electric detonator in the detonation assembly, so that detonation operation is realized, and detonation energy can be output to the outside.

The invention provides a memory alloy constrained detonation device, and belongs to the technical field of detonation. The memory alloy constrained detonation device comprises a detonation transmission part, memory alloy actuators, a driving spring, a steel ball, a status switch, an electric detonator, a detonating part, a body, a pressing screw, a large pressing screw and a bolt. At ordinary times, the two memory alloy actuators are used for locking the detonation transmission part at a position far away from the electric detonator, meanwhile, the status switch provides short-circuit protection for the electric detonator and plays a part in status indication, and even if the electric detonator accidentally works, the detonation transmission part is not detonated; after the memory alloy actuators are electrified and work, the locking of the detonation transmission part is relieved, the driving spring drives the detonation transmission part to move till the detonation transmission partis aligned with the electric detonator, and the status switch switches and disconnects short-circuit protection for the electric detonator; and after any electric detonator works, the detonation transmission part can be detonated, and then detonates the detonating part. The memory alloy constrained detonation device has the advantages of long-range control, high safety, reliable working, status indication and the like.

The invention discloses an on-site explosive mixture automatic charging and safe detonating device and a charging and detonating method. The on-site explosive mixture automatic charging and safe detonating device comprises a safety protection main body, a detonating cord and a detonator. A detonating cord mounting chamber and a detonator mounting chamber are arranged in the safety protection main body, and a detonator lead hole communicated with the detonator mounting chamber is formed in the side face of the safety protection main body. The detonating cord is arranged in the detonating cord mounting chamber, and the tail part of the detonating cord extends out of the rear end of the safety protection main body. The detonator is mounted in the detonator mounting chamber and is in compression connection with the detonating cord, and a detonator lead penetrates out of the detonator lead hole. The tail end of the safety protection main body is provided with an elastically telescopic reducing tail pipe, and the front end of the safety protection main body is provided with an exhaust hole. During charging, the safety protection main body is connected to the front end of an automatic charging pipe through the reducing tail pipe. According to the on-site explosive mixture automatic charging and safe detonating device and the charging and detonating method, friction between the detonating cord and the inner wall of a blast hole can be eradicated during charging, the detonator is prevented from colliding with rock at the bottom of the hole or on the wall of the hole, and potential safety hazards during automatic charging are thoroughly eliminated; and charging is accurate, effective contact with explosives can be achieved, and safe and reliable detonation of the explosives is guaranteed.

Explosive apparatus has at least two cuboid moldings, which each includes at least one firing hole and explosive, and whose edge lengths have a ratio of substantially 1:2:4, and a container including an internal area having a square outline and at least one aperture hole to the internal area, the internal area having a side length corresponding at least approximately to a longest edge length of the moldings and a height corresponding at least approximately to a shortest edge length of the moldings or to an integer multiple thereof, wherein the moldings are placed in the internal area of the container such that the at least one firing hole in one of the at least two moldings is aligned with the at least one aperture hole in the container, the aperture hole being intended for insertion of an explosive capsule into the firing hole of the corresponding molding.