CN208702392U - A kind of multi-functional rocket-powered stratum transformation device - Google Patents
A kind of multi-functional rocket-powered stratum transformation device Download PDFInfo
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- CN208702392U CN208702392U CN201821250592.2U CN201821250592U CN208702392U CN 208702392 U CN208702392 U CN 208702392U CN 201821250592 U CN201821250592 U CN 201821250592U CN 208702392 U CN208702392 U CN 208702392U
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Abstract
The utility model belongs to oil gas production equipment technical field, device is transformed more particularly to a kind of multi-functional rocket-powered stratum, it include: stratum transformation main body, there is burning negative pressure one room (2) in the stratum transformation main body, there is fuel (5) or cavity in burning negative pressure one room (2), the outside of the stratum transformation main body is pit shaft, is stratum on the outside of the pit shaft；The burning negative pressure one room (2) is connected to by the primacord system bands window to be formed that explodes with pit shaft；The fuel (5) exports energy to pit shaft for main body to be transformed by the stratum, to the stratum seam；Burning negative pressure one room (2), cavity are used to absorb the energy in pit shaft, reduce borehole pressure, release oil flow channel blocking.Burning negative pressure one room can be used as combustion chamber release high energy gas, to formation breakdown seam, also acts as negative pressure cavity absorption energy and negative pressure deblocking effect is presented, dredge seepage channel.Present apparatus structure is simple, low-cost, vdiverse in function, strong applicability.
Description
Technical field
The utility model belongs to oil-gas mining technical field, is related to a kind of tool of oil gas water well volume increase, especially a kind of
Device is transformed in multi-functional rocket-powered stratum.
Background technique
After pit shaft is established, oil-gas Layer is opened by perforation, links up pit shaft and stratum, forms oil flow channel.It exploited
The various factors of journey can cause the deterioration of seepage flow situation, influence the unimpeded of oil flow channel.And the blocking in channel and stratum infiltration
The change of performance needs to restore and be transformed by professional means, such as pressure break, high enegry gas fracturing, negative pressure deblocking.
Perforation forms oil flow channel, is completed by perforator, especially shaped charge with gun body.Shaped charge with gun body is by energy
The perforating gun body of a gun and thread seal for enough bearing the threaded high-strength alloy steel pipe (such as 32GrMo4) in both ends of blast impulse connect
The cavity that fitting (in connect, pipette tips, gun breech) collectively forms, it is common with the perforating bullet that is driven by beehive-shaped charge (such as RDX explosive)
The oil/gas well industrial explosive material of composition.The perforating oil gas well technology (2012.4 petroleum industry publishing house) of Lu great Wei chief editor,
It describes various perforating appliances structures, processing and use in detail, wherein records rifle in the description of chapter 2 third section perforating gun
Body perforating gun usually forms the cavity being fully sealed by pipette tips, the body of a gun, jointing and gun breech.It is protection perforation that it, which is acted on,
The components such as the intracavitary perforating bullet of rifle, firing mount, primacord, detonator, not by down-hole high pressure, soda acid and construction when shock impacts shadow
It rings, guarantees the reliably working of firer's device, and bear the influence of perforating bullet explosive charge impact.
Oil/gas well primacord refers to the connection for being mainly used for perforating bullet and perforating bullet in petroleum perforation system, plays biography
The explosive of quick-fried effect.National Defense Industry Press publishes within 2007, Zhang Guoshun chief editor " industrial explosive materials and safety " the 6th chapter
Section 6.3, have specific considerations to oil/gas well primacord.In petroleum perforation can according in primacord model primacord explosive payload,
Explosive type and primacord characteristic are selected (referring to SY/6411 standard).The primacord that the application refers to is all that oil/gas well is used
Primacord.
High enegry gas fracturing (High Energy Gas Fracture, abbreviation HEGF) is to utilize gunpowder or complex solid
The propellant a large amount of high temperature and high pressure gas that conflagration generates in the wellbore extrudes radial split more on the payzone of underground
Seam system, improves the permeance property of near wellbore zone, to increase the stratum transformation of oil gas well production and water injection well injection rate
Measure.Complex solid propellant abbreviation composite propellant is by inorganic oxidizer (ammonium perchlorate, ammonium nitrate etc.), burning
Agent (aluminium powder etc.) and the mixing cured manufactured gunpowder of high polymer binder.Usually it is divided into polysulfide rubber by the type of high polymer binder
Glue composite propellant, polyurethane composite propellant, end hydroxy butadiene composite propellant and carboxyl-terminated polybutadiene is compound pushes away
Into agent etc..Device, which is transformed, as the high energy gas stratum of energy using complex solid propellant at present many forms, has simple
Composite propellant powder column, there is composite propellant powder column to be placed in open screen casing (application number: CN200910023430.4), have
By composite propellant powder column be placed in closed steel pipe with special aperture flick out relief hole (application number:
CN201210327368.X a kind of) pulse detonation fracturing device for superhigh-temperature and-pressure well, in addition there are with perforating technology knot
The StimGun system of (USP 5775426) perforating gun outer cladding composite propellant closed and various composite gun perforations.It is produced for underground
The fuel medicament of raw high energy gas, contacts with well liquid and just needs heatproof waterproof, need especially to modulate；Although and under air-proof condition not
Medicament waterproof is needed, but special firer's element (aperture bullet etc.) is needed to output relief hole, needs pair are combined with perforator component
The form of medicine is specifically designed.Wherein gunpowder and perforating bullet are placed in the perforating gun body of a gun by built-in composite perforator simultaneously
In, body of a gun cavity will carry perforating bullet explosion and gunpowder detonation impact simultaneously, need the pressure release passage specially designed, structure is multiple
It is miscellaneous, and the gas energy exported is limited, affects stratum correctional effect.
Dynamic negative-pressure de-plugging is the method for another dredging seepage channel, and principle is quick by the cavity of negative pressure device
The medium in pit shaft is absorbed, well cylinder pressure moment is declined, temporary impact reflux is generated, rinses around perforation tunnel and duct
Compaction band is usually used in combination with perforation.The negative pressure device used both at home and abroad at present is that punching flicks hole pressure release and piston mostly
Two kinds of aperture pressure release.Patent CN201439709 discloses a kind of dynamic negative pressure perforator, is equipped on the firing mount in the perforator
Punching bullet, punching bullet are a kind of to body of a gun aperture, do not injure the special bullet of oil gas casing and cement sheath, also referred to as " open
Hole bullet ".After perforator detonation, the eyelet quantity being shot through on the body of a gun is more compared with former perforator, pressure release space is expanded, to discharge
Wellbore pressure realizes dynamic negative-pressure.Patent CN101994493 discloses a kind of dynamic dropping equipment, it is mounted on perforator
Lower end, the detonation pressure generated after perforator detonation push trip rod downlink, then push piston downlink, will be in dropping equipment
Chamber is connected to the lateral through-hole for connecing middle part in aperture is located at, and makes the well liquid in pit shaft by tapping into pressure-releasing chamber in aperture
Portion, and then make the reduction of well cylinder pressure, realize dynamic negative-pressure.Existing negative pressure device mainly has the disadvantage that: (1) using punching
Bullet carries out the pressure relief device of aperture pressure release, increases a large amount of punching bullet in perforator, additionally generates a large amount of detonation gases, drops
Lower negative pressure effect, improves cost.(2) pressure relief device of aperture pressure release is carried out using piston, structure is complicated, trip rod, piston
Etc. intermediate links it is more, aperture speed is slower on pressure relief device, and aerial drainage porthole area is smaller；In addition, in perforating job
The effect for establishing negative pressure simultaneously is unobvious, reduces the integrated artistic effect of dynamic negative-pressure perforation, is unable to fully embody dynamically negative
Press the advantage of perforating job.
The above de-plugging and stratum renovation technique, or be limited to powder performance, or by be placed in device complex effects it is undesirable,
And then its product cost and operating cost are improved, and it is cumbersome, using limited.
Utility model content
For deficiency existing for the above technology, it is simple that the utility model provides a kind of structure, blanket de-plugging and ground
Layer transformation device.
The utility model provides a kind of multi-functional rocket-powered stratum transformation device, comprising: main body is transformed in stratum, special
Sign is: having burning negative pressure one room in the stratum transformation main body, the burning negative pressure one is indoor to have fuel or sky
Chamber, the outside of the stratum transformation main body are pit shaft, are stratum on the outside of the pit shaft；The burning negative pressure one room is quick-fried by leading
The cable system bands window to be formed that explodes is connected to pit shaft；The fuel, it is defeated to pit shaft for main body to be transformed by the stratum
Energy out, to stratum seam；Burning negative pressure one room, cavity are used to absorb the energy in pit shaft, reduce borehole pressure,
Release oil flow channel blocking.
Preferably, the primacord system includes primacord and primacord knot (explosive item), and wherein primacord knot is quick-fried by leading
Rope superposition is assembled, the bands window being used to form.
Preferably, the burning negative pressure one is indoor has inner tube；The fuel is in said inner tube.
Preferably, the outside of the burning negative pressure one room has shell；There is recess region on the shell；
The recess region (weakness zone) be with the wall thickness of shell in contrast, pass through reduce part enclosure material thickness
(more than 1/2 wall thickness), the part of relatively easy stress deformation under specific impact；
The recess region inner wall has the primacord knot, and the primacord knot explosion breakdown recess region is formed
The burning negative pressure one room is connected to by bands window with the pit shaft.
Preferably, there is shell on the outside of said inner tube；There is gap between said inner tube and the shell；The primacord
System passes through the gap.
Preferably, the outside of said inner tube and/or the inside of the shell have thermal insulation layer.
Preferably, the both ends of the stratum transformation main body are respectively provided with jointing；Have respectively in 2 jointings
There are the first primacord hole and the second primacord hole；The primacord enters from first primacord hole, leads from described second quick-fried
Rope hole is pierced by；The primacord is for transmitting detonation energy.
The utility model has the beneficial effects that the utility model is by adjusting fuel according to conditions down-hole and pit shaft situation
Amount makes stratum transformation device be converted to energy output by energy absorption, and then functionally realize that negative pressure deblocking arrives from scratch
The variation of high enegry gas fracturing seam.The utility model, convenient for connecting with other Fire loads, suitability is strong, can be with a variety of works
Skill cooperation.
Detailed description of the invention
Fig. 1 is a kind of multi-functional rocket-powered stratum transformation apparatus structure schematic diagram of the utility model.
Fig. 2 is a kind of multi-functional rocket-powered stratum transformation device working principle diagram of the utility model.
Fig. 3 is the negative pressure deblocking tool structural schematic diagram that can access cavity in the utility model Fig. 1 without fuel.
Fig. 4 is the schematic diagram of primacord knot in primacord system in the utility model Fig. 1.
Fig. 5 is the partial enlarged view that primacord knot and outer casing groove region are combined in Fig. 1.
Fig. 6 is the utility model Fig. 1 a kind of multi-functional rocket-powered stratum transformation device and perforator combination schematic diagram.
Fig. 7 is that (jointing in Fig. 1) cut-away view is connect in perforating gun.
Fig. 8 is perforating gun (shell in Fig. 1) cut-away view.
Fig. 9 is perforating gun cavity (Fig. 1 burning negative pressure one room) schematic diagram.
Figure 10 is perforator structural schematic diagram.
In figure, jointing 1, burning negative pressure one room 2, primacord 3, inner tube 4, fuel 5, primacord knot 6(explosive item),
Thermal insulation layer 7, recess region 8(weakness zone), shell 9.
Specific embodiment
Below in conjunction with attached drawing, the utility model is described in further detail.
The structural schematic diagram of the multi-functional rocket-powered stratum transformation device of the one kind provided referring to Fig.1, a kind of Multifunctional fire
Device is transformed in the stratum of arrow power, comprising: main body is transformed in stratum, and stratum, which is transformed in main body, has burning negative pressure one room 2, burning
There is fuel 5 or cavity, it is stratum on the outside of pit shaft that the outside that main body is transformed in stratum, which is pit shaft, in negative pressure one room 2；The burning
Negative pressure one room 2 is connected to by the primacord system bands window to be formed that explodes with pit shaft；Fuel 5, for passing through the stratum
Main body is transformed and exports energy to pit shaft, to stratum seam；Burning negative pressure one room 2, cavity are used to absorb the energy in pit shaft,
Borehole pressure is reduced, oil flow channel blocking is released.According to conditions down-hole and pit shaft situation, the utility model is dispensed by adjustment portion
The amount of fuel is set, from scratch, so that stratum transformation main body is converted to energy output by energy absorption, and then functionally realize negative
Press de-plugging to the variation of high enegry gas fracturing seam.
In Fig. 1, primacord system includes primacord and primacord knot (explosive item), and wherein primacord knot is folded by primacord
Addition polymerization collection forms, and is used to form bands window.
In Fig. 1, the inside of burning negative pressure one room 2 has inner tube 4；Fuel 5 is in inner tube 4.
In Fig. 1, the outside of burning negative pressure one room 2 has shell 9；There is recess region 8 on shell 9；Recess region
(weakness zone) be with the wall thickness of shell in contrast, by reduce part enclosure material thickness (more than 1/2 wall thickness), specific
The part of relatively easy stress deformation under impact；
Burning negative pressure one room 2 is connected to by the bands window that recess region 8 is blown by primacord system with pit shaft.
In Fig. 1, there is shell 9 on the outside of inner tube 4；There is gap between inner tube 4 and shell 9；Primacord system, between passing through
Gap.
In Fig. 1, the outside of inner tube 4 and/or the inside of shell 9 have thermal insulation layer 7.
In Fig. 1, the both ends of stratum transformation main body are respectively provided with jointing 1；Is respectively provided in 2 jointings 1
One primacord hole and the second primacord hole；Primacord enters from the first primacord hole, leads primacord hole from second and is pierced by.
Device working principle diagram is transformed in a kind of multi-functional rocket-powered stratum of the utility model provided referring to Fig. 2, outside
Portion's detonation energy (detonation or propagation of explosion) enters in device (such as arrow II) via 1 centre bore of jointing (the first primacord hole),
(such as arrow I) is passed to by one end of primacord 3, and is propagated along the primacord 3 being wound in inner tube 4, it is thin to reach recess region 8(
Weak-strong test) excitation primacord knot 6 explodes (such as III), and continues back-propagation by the other end of primacord 3 via the second primacord
Hole exports (such as arrow V).Primacord knot 6 explodes, explosion energy radial cuts recess region 8(weakness zone), groove area of scraping
Domain 8(weakness zone) at shell wall form bands window, while explosion energy excitation fuel 5 herein burns, and thus locates
To two end burnings (such as arrow VI indicates), the gas energy of generation sprays (arrow IV) outward by bands window (bocca), into
Enter well set annular space, stratum is transformed.The quantity of bands window is according to fuel and generates gas flow setting.
It should be pointed out that burning negative pressure one room 2 should be known as combustion chamber when for energy output, sucked for energy
When should be known as negative pressure cavity, corresponding bands window is referred to as bocca and negative pressure window.
Embodiment 1: in conjunction with Fig. 1, being specifically transformed device as the multi-functional rocket-powered stratum of one kind of energy output,
Include: jointing 1, burning the negative pressure one room combustion chamber 2(), primacord 3, inner tube 4, fuel 5, primacord knot 6(explosive item),
Thermal insulation layer 7.Burning negative pressure one room 2 is the thick section and high strength alloy pipe and jointing 1 for having threaded sealing structure by both ends
The device cavity space of common trap, wherein the inner tube 4 being fixed with；Fuel 5(complex solid propellant) it is filled in inner tube 4
In, have thermal insulation layer 7(medium between inner tube 4 and burning 2 shell 9 of negative pressure one room)；Primacord 3 from inner tube 4 and burning negative pressure one
The gap of 2 shell 9 of body room passes through, in burning 2 outer casing groove region 8(weakness zone of negative pressure one room) inner wall at form lead it is quick-fried
Hitch 6,3 both ends of primacord are passed through from 1 centre bore of jointing connects other firer's equipment (explosion propagation device or priming device) biography
Pass detonation energy.Recess region 8(weakness zone) be with burning 2 shell of negative pressure one room heavy wall in contrast, pass through reduction
Part enclosure material thickness is formed, usually 1/3 in original thickness, in the easily-deformable part of specific impact lower stress, quantity, size
It is arranged as the case may be with position；Thermal insulation layer 7(medium) it can be vacuum or any gaseous state or solid heat-insulating material.Burning is negative
Integrated room 2 is pressed to design the threaded sealing structure that perforating gun (Fig. 8) can be used；Jointing 1 can for perforating gun head, gun breech, in
Connect or its similar structures, specifically determined according to access component, jointing can generally use in connect (Fig. 7) structure, or herein
On the basis of be finely adjusted (as expand inner hole).
Embodiment 2: as shown in figure 3, the present embodiment provides a kind of dynamic negative-pressure deblocking tool for generating negative pressure, including burning
Negative pressure one room 2(negative pressure cavity), primacord 3, inner tube 4, primacord knot 6, jointing 1；Device constitute in without fuel 5, without every
Thermosphere, only as the decompression cavity for forming pit shaft negative pressure, bands window is as negative pressure channel.By in the jointing 1(of two sides
It is empty) realize multiple negative pressure cavity concatenations, or be connected with perforator (Figure 10), usage mode meets gun perforation process process.Exist in this way
In operation, external detonation energy is passed to the excitation explosion opening recess region 8 of primacord knot 6 by one end of primacord 3 and forms channel
Window, medium enters the cavity of burning negative pressure one room 2 in well, causes well cylinder pressure to decline, generates the effect of dynamic negative-pressure,
Become dynamic negative-pressure perforation.
Embodiment 3: as shown in fig. 6, the present embodiment provides a kind of mode combined with perforator, i.e. fuel investment 5
Device is connected by the jointing 1 of two sides with perforator (Figure 10), by the unified propagation of explosion of primacord 3；While perforation, fuel
The energy of 5 burnings is opened the formation bands window of recess region 8 by the explosion of primacord knot 6 and is discharged into pit shaft, increases in pit shaft
Pressure generates stratum correctional effect to stratum seam.Its usage mode meets common gun perforation process process, applies with composite gun perforation
Work mode is essentially identical.Such mode, since the burning negative pressure one room 2 of the utility model can accommodate more powder volumes,
Therefore the stratum correctional effect formed by high energy gas is much better than common composite gun perforation.
It should be noted that Fig. 7~Figure 10 is the design that perforation tool generallys use in the prior art, wherein perforator (is schemed
10) it is followed successively by primacord, pipette tips, the body of a gun, positioning disk, firing mount, perforating bullet, gun breech by left-to-right, Fig. 9 is to connect (figure in being connected with
7) and the perforating gun of the body of a gun (Fig. 8), jointing structure generally use shown in Fig. 7, the design of body of a gun tube body seal pressure-bearing
8 structure of application drawing, the body of a gun (Fig. 8) generally use 32GrMo4 alloy pipe material, can bear the impact of perforation explosion without making
It is destroyed at tool construction.Material and design, jointing structure and the internal connection that the utility model refers to can all be adopted and be penetrated
The associated materials and structure of hole rifle.
The utility model relates to priming system be only fuel and primacord, fuel is complex solid propellant gunpowder,
Primacord is the general indispensable firer's material in oil field, can not have to be considered as the utility model proprietary material, so it is believed that this is practical
It is novel to only relate to a kind of priming system (complex solid propellant), convenient for management and use.The utility model thermal insulation layer and close
The presence for sealing combustion chamber, substantially reduces the waterproof heat resistance of propellant, thereby reduces material cost.
Jointing and cavity portion use existing perforating gun structure, suitable for being applied in combination with existing pipe string, increase this
The versatility of utility model device.Device detonation network is unified by primacord propagation of explosion, completes input and output by primacord, is convenient for
It is connect with other Fire loads, suitability is strong, can cooperate with kinds of processes.
Finally, it is noted that obviously embodiment is merely examples for clearly illustrating the present invention, not pair
The restriction of embodiment.For those of ordinary skill in the art, other can also be made not on the basis of explanation
With the variation and variation of form.Here exhaustion can not be carried out, and thus changes and variations that derived from are still located
Among the protection scope of the utility model.
Claims (7)
1. device is transformed in a kind of multi-functional rocket-powered stratum, comprising: main body is transformed in stratum, it is characterised in that:
There is burning negative pressure one room (2) in the stratum transformation main body, there is fuel in burning negative pressure one room (2)
(5) or cavity, the outside of the stratum transformation main body are pit shaft, are stratum on the outside of the pit shaft；
The burning negative pressure one room (2) is connected to by the primacord system bands window to be formed that explodes with pit shaft；
The fuel (5) exports energy to the pit shaft for main body to be transformed by the stratum, to stratum seam；
Burning negative pressure one room (2), cavity are used to absorb the energy in the pit shaft, reduce borehole pressure, solve oil removing
Circulation road blocking.
2. device is transformed in a kind of multi-functional rocket-powered stratum according to claim 1, it is characterised in that:
The primacord system includes primacord (3) and primacord knot (6), and the primacord knot (6) is superimposed poly- by primacord (3)
Collect, is used to form the bands window.
3. device is transformed in a kind of multi-functional rocket-powered stratum according to claim 1, it is characterised in that:
There are inner tube (4) in burning negative pressure one room (2)；
The fuel (5) is in said inner tube (4).
4. device is transformed in the multi-functional rocket-powered stratum of one kind according to claim 1 or claim 2, it is characterised in that:
The outside of burning negative pressure one room (2) has shell (9)；
There are recess region (8) on the shell (9)；
Recess region (8) inner wall has the primacord knot (6), and primacord knot (6) the explosion breakdown forms logical
Burning negative pressure one room (2) is connected to by road window with the pit shaft.
5. device is transformed in a kind of multi-functional rocket-powered stratum according to claim 3, it is characterised in that:
There are shell (9) on the outside of said inner tube (4)；
There is gap between said inner tube (4) and the shell (9)；
The primacord system passes through the gap.
6. device is transformed in a kind of multi-functional rocket-powered stratum according to claim 5, it is characterised in that:
The outside of said inner tube (4) and/or the inside of the shell (9) have thermal insulation layer (7).
7. device is transformed in a kind of multi-functional rocket-powered stratum according to claim 1, it is characterised in that:
The both ends of the stratum transformation main body are respectively provided with jointing (1)；
The first primacord hole and the second primacord hole are respectively provided in 2 jointings (1)；
The primacord (3) enters from first primacord hole, is pierced by from second primacord hole；
The primacord (3) is for transmitting detonation energy.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201721405107 | 2017-10-28 | ||
| CN201721405107X | 2017-10-28 |
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| CN208702392U true CN208702392U (en) | 2019-04-05 |
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| CN201810881482.4A Pending CN109723419A (en) | 2017-10-28 | 2018-08-05 | A kind of multi-functional rocket-powered stratum transformation device |
| CN201821250592.2U Active CN208702392U (en) | 2017-10-28 | 2018-08-05 | A kind of multi-functional rocket-powered stratum transformation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550228A (en) * | 2020-05-12 | 2020-08-18 | 燕山大学 | High-temperature-resistant advanced detonation device for deflagration fracturing and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111550213B (en) * | 2020-05-12 | 2022-05-17 | 大庆华翰邦石油装备制造有限公司 | Pore passage expanding device and method for scaling of ternary composite oil displacement well |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2098234B (en) * | 1981-05-08 | 1984-01-11 | Coal Industry Patents Ltd | Formation of wells for the in-situ conversion of underground minerals |
| CN1038269C (en) * | 1993-03-15 | 1998-05-06 | 西安奥地能源技术研究所 | Wax removing bullet for oil well |
| CN2276559Y (en) * | 1996-09-25 | 1998-03-18 | 西安石油学院 | Perforation-high energy gas fracturing device |
| CN101220739B (en) * | 2007-01-12 | 2011-07-20 | 中国石油集团川庆钻探工程有限公司测井公司 | Dynamic negative pressure device for oil gas well |
| CN102031952B (en) * | 2010-11-26 | 2013-12-25 | 中国航天科技集团公司川南机械厂 | Multi-stage perforation supercharging method |
| CN106014353A (en) * | 2016-05-20 | 2016-10-12 | 大庆华翰邦石油装备制造有限公司 | Energy-absorption plug-removal perforation device |
| RU2633883C1 (en) * | 2016-06-27 | 2017-10-19 | Общество с ограниченной ответственностью "ПерфоТерм" | Perforation and bottomhole treatment method and device for its implementation |
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2018
- 2018-08-05 CN CN201810881482.4A patent/CN109723419A/en active Pending
- 2018-08-05 CN CN201821250592.2U patent/CN208702392U/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111550228A (en) * | 2020-05-12 | 2020-08-18 | 燕山大学 | High-temperature-resistant advanced detonation device for deflagration fracturing and construction method thereof |
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