CN108547605A - A kind of surface of revolution three combines the device of cumulative pressure break increase shale gas recovery ratio - Google Patents
A kind of surface of revolution three combines the device of cumulative pressure break increase shale gas recovery ratio Download PDFInfo
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- CN108547605A CN108547605A CN201810208921.5A CN201810208921A CN108547605A CN 108547605 A CN108547605 A CN 108547605A CN 201810208921 A CN201810208921 A CN 201810208921A CN 108547605 A CN108547605 A CN 108547605A
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- 230000001186 cumulative effect Effects 0.000 title claims abstract description 30
- 238000011084 recovery Methods 0.000 title claims abstract description 22
- 239000002360 explosive Substances 0.000 claims abstract description 45
- 238000005474 detonation Methods 0.000 claims abstract description 23
- 230000037452 priming Effects 0.000 claims abstract description 15
- 241000700608 Sagitta Species 0.000 claims description 3
- 230000009172 bursting Effects 0.000 claims description 2
- 239000003999 initiator Substances 0.000 abstract description 16
- 208000037656 Respiratory Sounds Diseases 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 9
- 239000007789 gas Substances 0.000 description 36
- 238000000034 method Methods 0.000 description 17
- 238000004880 explosion Methods 0.000 description 9
- 239000006260 foam Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/263—Methods for stimulating production by forming crevices or fractures using explosives
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Abstract
A kind of surface of revolution three combines the device of cumulative pressure break increase shale gas recovery ratio, including priming device and air transporting arrangement, priming device includes three combination energy-gathering devices, detonation chain and initiator, three combination energy-gathering devices include by left energy gathering cap that explosive charge energy centralization projects to the right, the right energy gathering cap that explosive charge energy centralization is projected to the left, the middle energy gathering cap for projecting explosive charge energy centralization to center, and left energy gathering cap, middle energy gathering cap and right energy gathering cap are the surface of revolution of outward opening.Compared with prior art, due to the cumulative action of left energy gathering cap, middle energy gathering cap and right energy gathering cap, squeeze the shale in explosive fracturing area simultaneously from the direction in space of left, center, right three respectively, crackle is formed through rapidly the shale zone of fracture of " a " word shape, the specific surface area for increasing shale, to effectively increase the parsing rate and its recovery ratio of shale gas.A left side for spherical cap shape is convex to further enhance Mohaupt effect.
Description
Technical field
The present invention relates to the device for increasing shale gas recovery ratio, more particularly to a kind of surface of revolution three combines cumulative pressure break and increases
Add the device of shale gas recovery ratio.
Background technology
Shale gas is a kind of emerging clear energy sources, because its large storage capacity, exploitation receive much attention due to long the features such as in period.However
As gas storage carrier shale body because its Natural porosity it is small, permeability is low, and 95% shale gas well is needed through artificial fracturing
Mode increase shale body permeability, can have commercial mining value.
Currently, the method for artificial fracturing includes mainly two classes：When hydraulic fracturing method, second is that foam fracturing method.Water
It forces cracking method and mainly achievees the purpose that fracturing rock stratum by injecting highly pressurised liquid into drilling.According to specific fracturing technology,
Hydraulic fracturing method includes three kinds of multistage fracturing, riverfrac treatment, hydraulic jetting fracturing etc..Multistage fracturing is to utilize ball sealer or limit
Flow Technique separates the technology that reservoir different layers position carries out staged fracturing.Riverfrac treatment is to utilize the induction production of a large amount of clear water injection stratum
The fracturing technique in raw water conservancy diversion crack.Hydraulic jetting fracturing is to carry sand body using high speed and high-pressure fluid to carry out perforation and open to split
The fracturing technique of seam.Foam fracturing method mainly reaches the mesh of fracturing rock stratum by injecting the liquid gas mixture of high pressure into drilling
's.According to the difference of gas componant, foam fracturing method can be divided into nitrogen foam pressure break and carbon dioxide foaming pressure break etc. two
Kind.There is the shortcomings that being difficult to overcome in the fracturing process of rammell in hydraulic fracturing method and foam fracturing method：First, pressure break
A large amount of chemical agents are equipped in liquid, it is big to formation damage；Second is that after the perforation of pressure break later stage major fracture, the leakage of fracturing fluid compared with
It is serious；Third, the anti-row of fracturing fluid is slower.Most important, the occurrence form of shale gas is based on adsorbed gas, only by broken
Broken method increases the specific surface area of shale body, could increase the parsing amount of adsorbed gas, and above-mentioned two classes fracturing process is main
Achieve the purpose that volume increase by penetrating through the natural fissure in rock mass, the preservation characteristic of this and shale gas itself is inconsistent.
Chinese patent CN102168543B discloses a kind of method and dress increasing shale gas recovery ratio by explosive manner
It sets, described device setting includes loading priming device and air transporting arrangement, wherein loading detonation dress in shale gas well bore hole
It sets for surrounding shale to burst apart, air transporting arrangement will be transported to ground by the shale gas oozed out in the shale that is burst apart
Face；This method and device have that explosive charge power dissipation, explosive charge capacity usage ratio are low.
Invention content
The technical problem to be solved by the present invention is to overcome the defect of the prior art, the one kind for overcoming above-mentioned technical problem is provided
Surface of revolution three combines the device that cumulative pressure break increases shale gas recovery ratio.
In order to solve the above-mentioned technical problem, a kind of surface of revolution three of the present invention combines cumulative pressure break increase shale gas and adopts
The technical solution of the device of yield is as follows：
A kind of surface of revolution three combines the device of cumulative pressure break increase shale gas recovery ratio, and described device is arranged in shale gas
In well bore hole, described device includes priming device and air transporting arrangement, and priming device is for bursting apart surrounding shale, gas
Body conveying device will be transported to ground by the shale gas oozed out in the shale that is burst apart, the priming device include detonation chain and
Initiator, the air transporting arrangement include right flange, isolating device, Oil/Gas Pipe, poroid air inlet pipe；The poroid air inlet pipe is set
It sets between the isolating device and the right flange, one end of poroid air inlet pipe is arranged in the through-hole of the right flange, separately
One end is arranged in the through-hole in isolating device；Poroid air inlet pipe is the pipe with several air admission holes, and one end of Oil/Gas Pipe is arranged
In the through-hole of isolating device, the other end is connected with ground gas collecting apparatus；The priming device further includes three combination energy-gathering devices,
The three combinations energy-gathering device includes the left energy gathering cap for projecting explosive charge energy centralization to the right, by explosive charge energy centralization
The right energy gathering cap that projects to the left, is arranged on the left of left energy gathering cap the middle energy gathering cap for projecting explosive charge energy centralization to center
Left flange, be arranged between left energy gathering cap and middle energy gathering cap left flange, be arranged between right energy gathering cap and middle energy gathering cap
Right flange and casing；
The left energy gathering cap includes left concave outer surface and left concave inside surface, and the left concave outer surface and the left side are recessed
Shape inner surface is the surface of revolution of outward opening, and the surface of revolution of the left concave inside surface forms cavity；The left cumulative
Cover forms an enclosure space with left flange and left flange, and explosive is arranged in the space；The maximum of the left energy gathering cap
Outer diameter is Da, the length of the left energy gathering cap is La；
The right energy gathering cap includes right concave outer surface and right concave inside surface, and the right concave outer surface and the right side are recessed
Shape inner surface is the surface of revolution of outward opening, and the surface of revolution of the right concave inside surface forms cavity；The right cumulative
Cover forms an enclosure space with right flange and right flange, and explosive is arranged in the space；The maximum of the right energy gathering cap
Outer diameter is Db, the length of the right energy gathering cap is Lb；
The middle energy gathering cap includes middle concave outer surface and middle concave inner surface, the middle concave outer surface and the concave
Shape inner surface is the surface of revolution of outward opening, and the surface of revolution of the middle concave inner surface forms cavity；The middle cumulative
Cover forms an enclosure space with left flange and right flange, and explosive is arranged in the space；The middle energy gathering cap is most
Big outer diameter is Dc, the length of the middle energy gathering cap is Lc；
The left flange and right flange are both provided with collar aperture, be outside described sleeve pipe cylinder and its inside be round
Post holes, described sleeve pipe sequentially pass through the cavity of the left concave inside surface, the collar aperture of left flange, middle concave inner surface sky
Chamber, the collar aperture of right flange, right concave inside surface cavity and right flange through-hole, described sleeve pipe one end is fixed on left flange
Right side, the described sleeve pipe other end is fixed on the right side of right flange；
Several initiators, detonation is arranged in interval on the right surface of the left flange and the left surface of the left flange
Device is connect by the detonation chain being arranged in described sleeve pipe with ground control unit, and is controlled and detonated by ground control unit
The detonation of device；
Several initiators, detonation is arranged in interval on the left surface of the right flange and the right surface of the right flange
Device is connect by the detonation chain being arranged in described sleeve pipe with ground control unit, and is controlled and detonated by ground control unit
The detonation of device；
Several initiators are arranged in interval on the right surface of the left flange and the left surface of the right flange, rise
Quick-fried device is connect by the detonation chain being arranged in described sleeve pipe with ground control unit, and is controlled by ground control unit
The detonation of quick-fried device.
Left boss is provided on the right side of the left flange, the left boss is the spherical cap shape of outwardly convex, and the left side is convex
The height of projection of platform spherical cap shape is Ht, the maximum open part diameter of a circle of the left boss spherical cap shape is Dt；
Right boss is provided on the left of the right flange, the right boss is the spherical cap shape of outwardly convex, and the right side is convex
The height of projection of platform spherical cap shape is Ht, the maximum open part diameter of a circle of the right boss spherical cap shape is Dt；
Middle boss I is provided on the left of the left flange, the middle boss I is the spherical cap shape of outwardly convex, described
The height of projection of I spherical cap shape of middle boss is Ht, the maximum open part diameter of a circle of I spherical cap shape of middle boss is Dt；
Middle boss II is provided on the right side of the left flange, the middle boss II is the spherical cap shape of outwardly convex, institute
The height of projection for stating II spherical cap shape of middle boss is Ht, the maximum open part diameter of a circle of the left, center, right boss spherical cap shape
For Dt；
Middle boss III is provided on the left of the right flange, the middle boss III is the spherical cap shape of outwardly convex, institute
The height of projection for stating III spherical cap shape of middle boss is Ht, the maximum open part diameter of a circle of III spherical cap shape of middle boss is
Dt；
Middle boss IV is provided on the right side of the right flange, the middle boss IV is the spherical cap shape of outwardly convex, institute
The height of projection for stating IV spherical cap shape of middle boss is Ht, the maximum open part diameter of a circle of IV spherical cap shape of middle boss is
Dt；
The diameter DtFor explosive diameter D, the height HtFor 3mm~8mm.
Preferably, the rotary shaft of the left concave outer surface is XaThe busbar of axis, the left concave outer surface is busbar A,
The busbar A is around the XaAxis rotates to form the left concave outer surface, and the busbar A is the parabolic being made of following equation group
Line：
The rotary shaft of the left concave inside surface is XaThe busbar of axis, the left concave inside surface is busbar B, the busbar
B is around the XaAxis rotates to form the left concave inside surface, and the busbar B is the parabola being made of following equation group：
The rotary shaft of the right concave outer surface is XbThe busbar of axis, the right concave outer surface is busbar C, the busbar
C is around the XbAxis rotates to form the right concave outer surface, and the busbar C is the parabola being made of following equation group：
The rotary shaft of the right concave inside surface is XbThe busbar of axis, the right concave inside surface is busbar D, the busbar
D is around the XbAxis rotates to form the right concave inside surface, and the busbar D is the parabola being made of following equation group：
The rotary shaft of the middle concave outer surface is XcThe busbar of axis, the middle concave outer surface is busbar E, the busbar
E is the curve of outward opening, and the busbar E is around the XcAxis rotates to form the middle concave outer surface；
The rotary shaft of the middle concave inner surface is XcThe busbar of axis, the middle concave inner surface is busbar F, the busbar
F is the curve of outward opening, and the busbar F is around the XcAxis rotates to form the concave inside surface；
In various above：
Oa-XaYaZaThe coordinate origin of coordinate system is on the axis of the left energy gathering cap and in the length of left energy gathering cap
Point, XaAxis, YaAxis and ZaAxis constitutes right hand rectangular coordinate system, XaAxis is overlapped with the axis of the left energy gathering cap, XaAxis positive direction from
It is directed toward the right side of left energy gathering cap in the left side of left energy gathering cap；xa、yaAnd zaRespectively XaAxis, YaAxis and ZaThe coordinate variable of axis；
Oa1-Xa1Ya1Za1The coordinate origin of coordinate system is in Oa-XaYaZaIt is (- b in coordinate system1,c1, 0), Xa1Axis, Ya1Axis and
Za1Axis constitutes right hand rectangular coordinate system, Za1Axis and ZaAxis is parallel, Xa1Axis and XaAxle clamp angle is θa；xa1、ya1And za1Respectively Xa1
Axis, Ya1Axis and Za1The coordinate variable of axis；
Oa2-Xa2Ya2Za2The coordinate origin of coordinate system is in Oa-XaYaZaIt is (- b in coordinate system2,c2, 0), Xa2Axis, Ya2Axis and
Za2Axis constitutes right hand rectangular coordinate system, Za2Axis and ZaAxis is parallel, Xa1Axis and XaAxle clamp angle is θa；xa2、ya2And za2Respectively Xa2
Axis, Ya2Axis and Za2The coordinate variable of axis；
Ob-XbYbZbThe coordinate origin of coordinate system is on the axis of the right energy gathering cap and in the length of right energy gathering cap
Point, XbAxis, YbAxis and ZbAxis constitutes right hand rectangular coordinate system, XbAxis is overlapped with the axis of the right energy gathering cap, XbAxis positive direction from
It is directed toward the right side of right energy gathering cap in the left side of right energy gathering cap；xb、ybAnd zbRespectively XbAxis, YbAxis and ZbThe coordinate variable of axis；
Ob1-Xb1Yb1Zb1The coordinate origin of coordinate system is in Ob-XbYbZbIt is (b in coordinate system1,c1, 0), Xb1Axis, Yb1Axis and Zb1
Axis constitutes right hand rectangular coordinate system, Zb1Axis and ZbAxis is parallel, Xb1Axis and XbAxle clamp angle is θb；xb1、yb1And zb1Respectively Xb1Axis,
Yb1Axis and Zb1The coordinate variable of axis；
Ob2-Xb2Yb2Zb2The coordinate origin of coordinate system is in Ob-XbYbZbIt is (b in coordinate system2,c2, 0), Xb2Axis, Yb2Axis and Zb2
Axis constitutes right hand rectangular coordinate system, Zb2Axis and ZbAxis is parallel, Xb1Axis and XbAxle clamp angle is θb；xb2、yb2And zb2Respectively Xb2Axis,
Yb2Axis and Zb2The coordinate variable of axis；
Oc-XcYcZcThe coordinate origin of coordinate system is on the axis of the middle energy gathering cap and in the length of middle energy gathering cap
Point, XcAxis, YcAxis and ZcAxis constitutes right hand rectangular coordinate system, XcAxis is overlapped with the axis of the middle energy gathering cap, XcAxis positive direction from
The right side of energy gathering cap during the left side of middle energy gathering cap is directed toward；xc、ycAnd zcRespectively XcAxis, YcAxis and ZcThe coordinate variable of axis；
XaAxis, XbAxis and XcAxis is conllinear；
DaAnd DbIt is equal and be D, LaAnd LbIt is equal and be L, θa=-θ, θb=θ；
D is 100mm~800mm, and L is 200mm~1000mm, and θ is 0 °~60 °；
DcFor 100mm~800mm, LcFor 200mm~1000mm；
H is the minimum wall thickness (MINI W.) of left energy gathering cap, middle energy gathering cap and right energy gathering cap, and H is 1mm~10mm；
a1、b1、c1、a2、b2、c2For parameter, c1It is 0.2~0.90 times of D, c2It is 0.15~0.85 times and c of D1>c2；
It solves following equation group and obtains a1、b1Value and a1>0：
It solves following equation group and obtains a2、b2Value and a2>0：
Preferably, the parameter：D is 200mm~500mm, and L is 300mm~600mm, DcFor 200mm~500mm, LcFor
300mm~600mm；
Preferably, the parameter：θ is 30 °~50 °；
Preferably, the parameter c1It is 0.2~0.6 times of D, c2It is 0.15~0.55 times and c of D1>c2；
Preferably, the radial minimum wall thickness (MINI W.) H is 1mm~5mm.
Compared with prior art, advantageous effect of the present invention is：Due to Mohaupt effect, parabolical optical characteristics and opening
The cumulative characteristic of outside curve is projected explosive charge energy centralization by left energy gathering cap, middle energy gathering cap and right energy gathering cap, is fried
Medicine explosion energy utilization rate is high, while improving the quantity of the length and shale crackle of the shale crackle in explosive fracturing area；Especially
It is the cumulative action due to left energy gathering cap, middle energy gathering cap and right energy gathering cap, is squeezed simultaneously from the direction in space of left, center, right three respectively
The shale in explosive fracturing area, crackle is pressed to be formed through the shale zone of fracture of " a " word shape rapidly, increase the specific surface of shale
Product, to effectively increase the parsing rate and its recovery ratio of shale gas.Simultaneously as the left boss of spherical cap shape, right boss,
The cumulative action of the outwardly convex of middle boss I, middle boss II, middle boss III, middle boss IV, further enhances Mohaupt effect.
Description of the drawings
Fig. 1 is schematic device；
Fig. 2 is left energy gathering cap structural schematic diagram；
Fig. 3 is right energy gathering cap structural schematic diagram；
Fig. 4 is the middle energy gathering cap structural schematic diagram of embodiment one；
Fig. 5 is the middle energy gathering cap reality structural schematic diagram for applying example two；
In above-mentioned Fig. 1-Fig. 5：1- shale gas well bore holes, 2- Oil/Gas Pipes, the poroid air inlet pipe of 3-, 4- air admission holes, the right spills of 5-
Outer surface, the right concave inside surfaces of 6-, the right energy gathering caps of 7-, 8- middle concaves outer surface, 9- middle concave inner surfaces, energy gathering cap in 10-,
The left concave outer surfaces of 11-, the left concave inside surfaces of 12-, the left flanges of 13-, the left energy gathering caps of 14-, the left flanges of 15-, the right convexities of 16-
Edge, 17- casings, the right flanges of 18-, 19- isolating devices, 20- initiators, 21- detonation chains.
Specific implementation mode
Below in conjunction with Figure of description, preferred embodiment of the present invention will be described, it should be understood that described herein
Preferred embodiment is only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention
Embodiment one.
A kind of surface of revolution three combines the device of cumulative pressure break increase shale gas recovery ratio, and described device is arranged in shale gas
1 in well bore hole, described device includes priming device and air transporting arrangement, and priming device is used to burst apart in surrounding shale,
Air transporting arrangement will be transported to ground by the shale gas oozed out in the shale that is burst apart, and the priming device includes detonation chain
21 and initiator 20, the air transporting arrangement include right flange 18, isolating device 19, Oil/Gas Pipe 12, poroid air inlet pipe 3；Institute
It states poroid air inlet pipe 3 to be arranged between the isolating device 19 and the right flange 18, one end of poroid air inlet pipe 3 is arranged in institute
In the through-hole for stating right flange 19, the other end is arranged in the through-hole in isolating device 19；Poroid air inlet pipe 3 is with several air inlets
One end of the pipe in hole, Oil/Gas Pipe 2 is arranged in the through-hole of isolating device 19, and the other end is connected with ground gas collecting apparatus；Described
Quick-fried device further includes three combination energy-gathering devices, and the three combinations energy-gathering device includes projecting explosive charge energy centralization to the right
Left energy gathering cap 14, the right energy gathering cap 7 for projecting explosive charge energy centralization to the left project explosive charge energy centralization to center
Middle energy gathering cap 10, be arranged the left side of left energy gathering cap 14 left flange, be arranged between left energy gathering cap 14 and middle energy gathering cap 10
Left flange 15, the right flange 16 being arranged between right energy gathering cap 7 and middle energy gathering cap 10 and casing 17；
The left energy gathering cap 14 includes left concave outer surface 11 and left concave inside surface 12,11 He of left concave outer surface
The left concave inside surface 12 is the surface of revolution of outward opening, and the surface of revolution of the left concave inside surface 2 forms cavity；
The left energy gathering cap 14 forms an enclosure space with left flange 13 and left flange 15, and explosive is arranged in the space；Institute
The maximum outside diameter for stating left energy gathering cap 14 is Da, the length of the left energy gathering cap 14 is La；
The right energy gathering cap 7 includes right concave outer surface 5 and right concave inside surface 6, the right concave outer surface 5 and described
Right concave inside surface 6 is the surface of revolution of outward opening, and the surface of revolution of the right concave inside surface 6 forms cavity；It is described
Right energy gathering cap 7 forms an enclosure space with right flange 18 and right flange 16, and explosive is arranged in the space；It is described right poly-
The maximum outside diameter that 7 can be covered is Db, the length of the right energy gathering cap 7 is Lb；
The middle energy gathering cap 10 includes middle concave outer surface 8 and middle concave inner surface 9, the middle concave outer surface 8 and institute
The surface of revolution that middle concave inner surface 9 is outward opening is stated, the surface of revolution of the middle concave inner surface 9 forms cavity；Institute
It states middle energy gathering cap 10 and forms an enclosure space with left flange 15 and right flange 16, and explosive is set in the space；Institute
The maximum outside diameter for stating middle energy gathering cap 10 is Dc, the length of the middle energy gathering cap 10 is Lc；
The left flange 15 and right flange 16 are both provided with collar aperture, and 17 outside of described sleeve pipe is in cylinder and its
Portion is cylindrical hole, and described sleeve pipe 17 sequentially passes through cavity, the collar aperture of left flange 15, the concave of the left concave inside surface 12
The cavity of shape inner surface 9, the collar aperture of right flange 16, right concave inside surface 6 cavity and right flange 18 through-hole, the set
17 one end of pipe is fixed on the right side of left flange 13, and 17 other end of described sleeve pipe is fixed on the right side of right flange 18；
Several initiators are arranged in interval on the right surface of the left flange 13 and the left surface of the left flange 15
20, initiator 20 is connect by the detonation chain 21 being arranged in described sleeve pipe 17 with ground control unit, and is controlled by ground
The detonation of device control initiator 20 processed；
Several initiators are arranged in interval on the left surface of the right flange 18 and the right surface of the right flange 16
20, initiator 20 is connect by the detonation chain 21 being arranged in described sleeve pipe 17 with ground control unit, and is controlled by ground
The detonation of device control initiator 20 processed；
Several detonations of interval setting on the right surface of the left flange 15 and the left surface of the right flange 16
Device 20, initiator 20 is connect by the detonation chain 21 being arranged in described sleeve pipe 17 with ground control unit, and passes through ground
Control device controls the detonation of initiator 20.
The right side of the left flange 15 is provided with left boss, and the left boss is the spherical cap shape of outwardly convex, the left side
The height of projection of boss spherical cap shape is Ht, the maximum open part diameter of a circle of the left boss spherical cap shape is Dt；
The left side of the right flange 18 is provided with right boss, and the right boss is the spherical cap shape of outwardly convex, the right side
The height of projection of boss spherical cap shape is Ht, the maximum open part diameter of a circle of the right boss spherical cap shape is Dt；
The left side of the left flange 15 is provided with middle boss I, and the middle boss I is the spherical cap shape of outwardly convex, institute
The height of projection for stating I spherical cap shape of middle boss is Ht, the maximum open part diameter of a circle of I spherical cap shape of middle boss is Dt；
The right side of the left flange 15 is provided with middle boss II, and the middle boss II is the spherical cap shape of outwardly convex,
The height of projection of II spherical cap shape of middle boss is Ht, the left, center, right boss spherical cap shape maximum open part circle it is straight
Diameter is Dt；
The left side of the right flange 16 is provided with middle boss III, and the middle boss III is the spherical cap shape of outwardly convex,
The height of projection of III spherical cap shape of middle boss is Ht, the maximum open part diameter of a circle of III spherical cap shape of middle boss
For Dt；
The right side of the right flange 16 is provided with middle boss IV, and the middle boss IV is the spherical cap shape of outwardly convex,
The height of projection of IV spherical cap shape of middle boss is Ht, the maximum open part diameter of a circle of IV spherical cap shape of middle boss
For Dt；
The diameter DtFor explosive diameter D, the height HtFor 3mm~8mm.
Establish Oa-XaYaZaCoordinate system, Oa1-Xa1Ya1Za1Coordinate system, Oa2-Xa2Ya2Za2Coordinate system, Ob-XbYbZbCoordinate system,
Ob1-Xb1Yb1Zb1Coordinate system, Ob2-Xb2Yb2Zb2Coordinate system and Oc-XcYcZcCoordinate system is as follows：
Oa-XaYaZaThe coordinate origin of coordinate system is on the axis of the left energy gathering cap 14 and in the length of left energy gathering cap 14
Midpoint, XaAxis, YaAxis and ZaAxis constitutes right hand rectangular coordinate system, XaAxis is overlapped with the axis of the left energy gathering cap 14, XaAxis is just
The right side of left energy gathering cap 14 is directed toward from the left side of left energy gathering cap 14 in direction；xa、yaAnd zaRespectively XaAxis, YaAxis and ZaThe coordinate of axis
Variable；
Oa1-Xa1Ya1Za1The coordinate origin of coordinate system is in Oa-XaYaZaIt is (- b in coordinate system1,c1, 0), Xa1Axis, Ya1Axis and
Za1Axis constitutes right hand rectangular coordinate system, Za1Axis and ZaAxis is parallel, Xa1Axis and XaAxle clamp angle is θa；xa1、ya1And za1Respectively Xa1
Axis, Ya1Axis and Za1The coordinate variable of axis；
Oa2-Xa2Ya2Za2The coordinate origin of coordinate system is in Oa-XaYaZaIt is (- b in coordinate system2,c2, 0), Xa2Axis, Ya2Axis and
Za2Axis constitutes right hand rectangular coordinate system, Za2Axis and ZaAxis is parallel, Xa1Axis and XaAxle clamp angle is θa；xa2、ya2And za2Respectively Xa2
Axis, Ya2Axis and Za2The coordinate variable of axis；
Ob-XbYbZbThe coordinate origin of coordinate system is on the axis of the right energy gathering cap 7 and in the length of right energy gathering cap 7
Midpoint, XbAxis, YbAxis and ZbAxis constitutes right hand rectangular coordinate system, XbAxis is overlapped with the axis of the right energy gathering cap 7, XbAxis positive direction
The right side of right energy gathering cap 7 is directed toward from the left side of right energy gathering cap 7；xb、ybAnd zbRespectively XbAxis, YbAxis and ZbThe coordinate variable of axis；
Ob1-Xb1Yb1Zb1The coordinate origin of coordinate system is in Ob-XbYbZbIt is (b in coordinate system1,c1, 0), Xb1Axis, Yb1Axis and Zb1
Axis constitutes right hand rectangular coordinate system, Zb1Axis and ZbAxis is parallel, Xb1Axis and XbAxle clamp angle is θb；xb1、yb1And zb1Respectively Xb1Axis,
Yb1Axis and Zb1The coordinate variable of axis；
Ob2-Xb2Yb2Zb2The coordinate origin of coordinate system is in Ob-XbYbZbIt is (b in coordinate system2,c2, 0), Xb2Axis, Yb2Axis and Zb2
Axis constitutes right hand rectangular coordinate system, Zb2Axis and ZbAxis is parallel, Xb1Axis and XbAxle clamp angle is θb；xb2、yb2And zb2Respectively Xb2Axis,
Yb2Axis and Zb2The coordinate variable of axis；
Oc-XcYcZcThe coordinate origin of coordinate system is on the axis of the middle energy gathering cap 10 and in the length of middle energy gathering cap 10
Midpoint, XcAxis, YcAxis and ZcAxis constitutes right hand rectangular coordinate system, XcAxis is overlapped with the axis of the middle energy gathering cap 10, XcAxis is just
Direction therefrom energy gathering cap 10 left side be directed toward in energy gathering cap 10 right side；xc、ycAnd zcRespectively XcAxis, YcAxis and ZcThe coordinate of axis
Variable.
XaAxis, XbAxis and XcAxis is conllinear.
The rotary shaft of the left concave outer surface 11 is XaThe busbar of axis, the left concave outer surface 11 is busbar A, described
Busbar A is around the XaAxis rotates to form the left concave outer surface 11, and the busbar A is the parabolic being made of following equation group
Line：
The rotary shaft of the left concave inside surface 12 is XaThe busbar of axis, the left concave inside surface 12 is busbar B, described
Busbar B is around the XaAxis rotates to form the left concave inside surface 12, and the busbar B is the parabolic being made of following equation group
Line：
The rotary shaft of the right concave outer surface 5 is XbThe busbar of axis, the right concave outer surface 5 is busbar C, the mother
Line C is around the XbAxis rotates to form the right concave outer surface 5, and the busbar C is the parabola being made of following equation group：
The rotary shaft of the right concave inside surface 6 is XbThe busbar of axis, the right concave inside surface 6 is busbar D, the mother
Line D is around the XbAxis rotates to form the right concave inside surface 6, and the busbar D is the parabola being made of following equation group：
The rotary shaft of the middle concave outer surface 8 is XcThe busbar of axis, the middle concave outer surface 8 is busbar E, the mother
Line E is around the XcAxis rotates to form the middle concave outer surface 8, and the busbar E is the parabola being made of following equation：
yc=a3+b3xc 2； (15)
The rotary shaft of the middle concave inner surface 9 is XcThe busbar of axis, the middle concave inner surface 9 is busbar F, the mother
Line F is around the XcAxis rotates to form the concave inside surface 9, and the busbar F is the parabola being made of following equation：
yc=a4+b4xc 2； (16)
In various above：
DaAnd DbIt is equal and be D, LaAnd LbIt is equal and be L, θa=-θ, θb=θ；
D is 100mm~800mm, and L is 200mm~1000mm, and θ is 0 °~60 °；
DcFor 100mm~800mm, LcFor 200mm~1000mm；
H is the minimum wall thickness (MINI W.) of left energy gathering cap 14, middle energy gathering cap 10 and right energy gathering cap 7, and H is 1mm~10mm；
a1、b1、c1、a2、b2、c2For parameter, c1It is 0.2~0.90 times of D, c2It is 0.15~0.85 times and c of D1>c2；
a3、b3、a4And b4For parameter, a3For Dc0.2~0.90 times, a4For Dc0.15~0.85 times and a3>a4；
Known parabola is by vertex (0, a3, 0) and other two points
Then rule of thumb, b3、b4It is calculated by following formula：
In formula：e3、e4For coefficient, e3For 0.5~1.5, e4For 0.8~1.8 and e4>e3。
The major parameter of right cumulative 7 is defined below.
The parabola mistake of the right concave outer surface 5 of right energy gathering cap 7With2 points, i.e.,：WhenWhen,WhenWhen,It brings into after set of equations (13) arranges and obtains：
It solves above equation group (17) and obtains a1、b1Value and a1>0, to ensure parabola outward opening, therefore it is required that a1>
0；
The minimum wall thickness (MINI W.) of right energy gathering cap 7 is H, then the right concave inside surface parabola mistake of right energy gathering cap 7
With2 points, i.e.,：WhenWhen,WhenWhen,It brings into
Set of equations (14) obtains after arranging：
It solves above equation group (18) and obtains a2、b2Value and a2>0, to ensure parabola outward opening, therefore it is required that a2>
0；
In the present embodiment, θ=45 ° are chosen, then are had：θa=-45 °, θb=45 °；Due to sin45 °=cos45 °, then equation
Group (17) is transformed to equation group (19)：
In equation group (19), P1、Q1Calculation formula is：
P1=D-L-2c1； (20)
Q1=D+L-2c1； (21)
Equation group (19) is solved, b is cast out1<0 solution can be obtained with ensureing parabola outward opening：
Similarly, θ=45 ° are chosen, then are had：θa=-45 °, θb=45 °；Due to sin45 °=cos45 °, then equation group (18)
It is transformed to equation group (23)：
In equation group (23), P2、Q2Calculation formula is：
P2=D-L-2c2-2H； (24)
Q2=D+L-2c2-2H； (25)
Equation group (23) is solved, b is cast out2<0 solution can be obtained with ensureing parabola outward opening：
In the present embodiment, each parameter or coefficient are specifically chosen and are solved as follows：
It chooses：D=300mm, L=400mm, La=400mm, Lb=400mm, takes c1For the 0.2 times i.e. c of D1=60mm, takes
c2For the 0.15 times i.e. c of D2=45mm, H=2mm is calculated according to (22) and (26)：
b1=179.0724809mm, a1=0.007938555mm；
b2=184.116701mm, a2=0.008717154mm.
The major parameter of right energy gathering cap 7 determined above.Left energy gathering cap 14 is left-right symmetric relation with right energy gathering cap 7, because
This, the major parameter of left energy gathering cap 14 also determines therewith.
The major parameter of middle energy gathering cap 10 is defined below.
The present embodiment is chosen：Dc=D, that is, Dc=300mm, Lc=L, that is, Lc=400mm, takes a3For Dc0.2 times i.e. a3=
60mm takes a4For Dc0.15 times i.e. a4=45mm and meet a3>a4, take e3=0.8 and e4=1.0 and meet e4>e3, band respectively
Enter formula (16-1) and (16-2), obtains：
The technical solution of the present embodiment one and its major parameter determination finish as a result,.
Embodiment two.
The determination of the major parameter of right energy gathering cap 7 and left energy gathering cap 14 is the same as embodiment one.
The busbar E of the middle concave outer surface 8 of middle energy gathering cap 10 is one section of circular arc, powder charge of the circular arc center of circle in middle energy gathering cap 10
Length LcCentre position and with the XdThe distance of axis is Lc1, arc radius Rc1；
The busbar F of the middle concave inner surface 9 of middle energy gathering cap 10 is one section of circular arc, powder charge of the circular arc center of circle in middle energy gathering cap 10
Length LcCentre position and with the XdThe distance of axis is Lc2, arc radius Rc2；
According to known chord length LcWith sagitta Hc1、Hc2Seek radius Rc1、Rc2Formula, Rc1、Rc2、Lc1And Lc2Following public affairs are pressed respectively
Formula calculates：
Hc1And Hc2It is sagitta, Hc1For charge diameter Dc0.1~0.4 times, Hc2For charge diameter Dc0.11~0.41
Times and Hc2>Hc1。
The present embodiment is chosen：Dc=D, that is, Dc=300mm, Lc=L, that is, Lc=400mm, takes Hc1For Dc0.2 times i.e. Hc1=
60mm takes Hc2For Dc0.22 times i.e. Hc2=66mm and meet Hc2>Hc1Bring formula (27), (28), (29) and (30) into respectively,
It obtains：
The technical solution of the present embodiment and its major parameter determination finish as a result,.
The present embodiment two is table in the middle concave outer surface 8 of middle energy gathering cap 10 and middle concave with one difference of embodiment
The shape of generatrix in face 9 is different.
It is preferable that above example integrates Mohaupt effect.
According to Mohaupt effect, after explosive charge, explosion product is at high temperature under high pressure substantially along explosive normal to a surface side
To what is dispersed outward, therefore, explosive with groove will appear one is converged, speed and pressure after ignition in recess axis
Strong all very high explosion product stream, in a certain range puts together the explosion energy that explosive charge releases.This hair
The outer surface of bright left energy gathering cap 14, middle energy gathering cap 10 and right energy gathering cap 7 and inner surface are surface of revolution, busbar A, busbar B,
Busbar C and busbar D is parabola (the busbar E and busbar F of wherein embodiment one are also parabola), the rotary shaft of surface of revolution
It has angle (wherein, the axis of symmetry of the busbar E and busbar F of embodiment one and middle energy gathering cap 10 with the parabolical axis of symmetry
Surface of revolution rotary shaft it is in 90 °)；The parabolical axis of symmetry of left energy gathering cap 14 is after the rotary shaft rotation of surface of revolution
Left circular conical surface is formed, the parabolical axis of symmetry of right energy gathering cap 7 forms right circular conical surface after the rotary shaft rotation of surface of revolution,
The parabolical axis of symmetry of the middle energy gathering cap 10 of embodiment one is formed after the rotary shaft rotation of surface of revolution perpendicular to rotation
The middle plane of axis；Due to parabolical light characteristic, i.e., the light ray parallel through the light of focus after parabolic reflective is in parabolic
The axis of symmetry of line, this parabolical characteristic further enhance Mohaupt effect；The median generatrix E and busbar F of embodiment two be
Also there is the characteristic to center of circle cumulative, the surface of revolution of other outward openings also to have similar enhancing cumulative effect for circular arc, circular arc
It answers；After the explosive charge of energy gathering cap, the explosion energy of left energy gathering cap 14, which is converged along left circular conical surface to space dextrad, to be projected, right cumulative
The explosion energy of cover 7 is converged to space left-hand along right circular conical surface and is projected, the explosion energy of middle energy gathering cap 10 plane in converge to
Direction in space perpendicular to rotary shaft projects, and three direction in spaces squeeze the shale in explosive fracturing area simultaneously, and crackle penetrates through rapidly
The shale zone of fracture for forming " a " word shape, increases the specific surface area of shale, to effectively increase the parsing speed of shale gas
Rate and its recovery ratio.Simultaneously as the left boss of spherical cap shape, right boss, middle boss I, middle boss II, middle boss III, convexity
The cumulative action of the outwardly convex of platform IV, further enhances Mohaupt effect.
To ensure that 14 wall thickness of left energy gathering cap and the wall thickness of right energy gathering cap 7 are gradually reduced from centre to both sides, it is desirable that c1>
c2；Similarly, the wall thickness for energy gathering cap in guarantee 10 is gradually reduced from centre to both sides, it is desirable that a3>a4Or Hc2>Hc1。
Parameter c1、c2、a3、a4、e3、e4、Hc2、Hc1Value, should be selected according to performances such as the hardness of shale, parameter c1、c2、
a3、a4Value is smaller and Hc2、Hc1Value it is bigger, explosion energy convergence is more concentrated, and explosive fracturing area is deep and narrow, shale crackle length
Degree is longer；Conversely, explosion energy convergence more dissipates, explosive fracturing area is wide and shallow, the length of shale crackle is shorter.c1It is the 0.2 of D
~0.90 times, c2It is 0.15~0.85 times and c of D1>c2；a3For Dc0.2~0.90 times, a4For Dc0.15~0.85 times and a3
>a4；e3For 0.5~1.5, e4For 0.8~1.8 and e4>e3；Hc1For charge diameter Dc0.1~0.4 times, Hc2For charge diameter Dc
0.11~0.41 times and Hc2>Hc1；Preferably：c1It is 0.2~0.6 times of D, c2It is 0.15~0.55 times and c of D1>c2, a3For
Dc0.2~0.6 times, a3For Dc0.15~0.55 times and a3>a3；e3For 0.8~1.2, e4For 1.0~1.4 and e4>e3, Hc1For
Charge diameter Dc0.2~0.35 times, Hc2For charge diameter Dc0.22~0.36 times and Hc2>Hc1。
The value of the performances selection parameter such as hardness according to shale θ, θ values are bigger, and explosive fracturing area is narrower, the easier pressure of shale
Broken, shale crackle length is shorter and the quantity of shale crackle is more；θ values are smaller, and explosive fracturing area is wider, shale is more not easy to press
Broken, shale crackle length is longer and the quantity of shale crackle is fewer；θ values are 0 °~60 °, preferably：θ values be 30 °~
50°。
Other than the paraboloid of revolution of embodiment one and embodiment two and rotation arc surface, technical scheme of the present invention may be used also
To be the surface of revolution of other outward openings such as the hyperboloid of revolution and ellipse of revolution face, it may have similar effect.
Left energy gathering cap 14, middle energy gathering cap 10 and right energy gathering cap 7 are made by the aluminium alloy of 7A09 models, and cost performance is most
It is good.
Left flange 13, left flange 5, right flange 6 and right flange 8 are made by 4350 steel alloys, and cost performance is most
It is good.
Described sleeve pipe 17 is made by HP9-4-20 type high temperature resistant stainless steel pipes, and cost performance is best.
A kind of surface of revolution three disclosed in this invention combines the device that cumulative pressure break increases shale gas recovery ratio, is making
When, explosive is put into priming device in advance, then whole device is arranged in shale gas well bore hole 1 again；Initiator 20
Including electric cap, digital primer etc., detonation mode includes electric initiating, digital detonation etc.；The explosive includes liquid explosives, solid
Explosive etc..
Above example is the primary structure of the present invention, form parameter, remaining CONSTRUCTED SPECIFICATION is common according to this professional domain
Common technical knowledge and conventional techniques are designed and select.
Claims (9)
1. a kind of surface of revolution three combines the device that cumulative pressure break increases shale gas recovery ratio, described device is arranged in shale gas well
In bore hole, described device includes priming device and air transporting arrangement, and priming device is for bursting apart surrounding shale, gas
Conveying device will be transported to ground by the shale gas oozed out in the shale that is burst apart, and the priming device includes detonation chain and rises
Quick-fried device, the air transporting arrangement include right flange, isolating device, Oil/Gas Pipe, poroid air inlet pipe；The poroid air inlet pipe setting
Between the isolating device and the right flange, one end of poroid air inlet pipe is arranged in the through-hole of the right flange, another
It holds in the through-hole being arranged in isolating device；Poroid air inlet pipe is the pipe with several air admission holes, and one end setting of Oil/Gas Pipe exists
In the through-hole of isolating device, the other end is connected with ground gas collecting apparatus；It is characterized in that the priming device further includes three combinations
Energy-gathering device, it is described three combination energy-gathering device include the left energy gathering cap for projecting explosive charge energy centralization to the right, explosive is quick-fried
Right energy gathering cap that fried energy centralization projects to the left, is arranged on a left side the middle energy gathering cap for projecting explosive charge energy centralization to center
Left flange on the left of energy gathering cap, the left flange being arranged between left energy gathering cap and middle energy gathering cap, setting right energy gathering cap and in
Right flange between energy gathering cap and casing；
The left energy gathering cap includes left concave outer surface and left concave inside surface, in the left concave outer surface and the left spill
Surface is the surface of revolution of outward opening, and the surface of revolution of the left concave inside surface forms cavity；The left energy gathering cap with
Left flange and left flange form an enclosure space, and explosive is arranged in the space；The maximum outside diameter of the left energy gathering cap
For Da, the length of the left energy gathering cap is La；
The right energy gathering cap includes right concave outer surface and right concave inside surface, in the right concave outer surface and the right spill
Surface is the surface of revolution of outward opening, and the surface of revolution of the right concave inside surface forms cavity；The right energy gathering cap with
Right flange and right flange form an enclosure space, and explosive is arranged in the space；The maximum outside diameter of the right energy gathering cap
For Db, the length of the right energy gathering cap is Lb；
The middle energy gathering cap includes middle concave outer surface and middle concave inner surface, in the middle concave outer surface and the middle concave
Surface is the surface of revolution of outward opening, and the surface of revolution of the middle concave inner surface forms cavity；The middle energy gathering cap with
Left flange and right flange form an enclosure space, and explosive is arranged in the space；The maximum of the middle energy gathering cap is outer
Diameter is Dc, the length of the middle energy gathering cap is Lc；
The left flange and right flange are both provided with collar aperture, be outside described sleeve pipe cylinder and its inside be cylinder
Hole, described sleeve pipe sequentially pass through the cavity of the left concave inside surface, the collar aperture of left flange, middle concave inner surface sky
Chamber, the collar aperture of right flange, right concave inside surface cavity and right flange through-hole, described sleeve pipe one end is fixed on left flange
Right side, the described sleeve pipe other end is fixed on the right side of right flange；
Left boss is provided on the right side of the left flange, the left boss is the spherical cap shape of outwardly convex, the left boss ball
The height of projection of crown shape is Ht, the maximum open part diameter of a circle of the left boss spherical cap shape is Dt；
Right boss is provided on the left of the right flange, the right boss is the spherical cap shape of outwardly convex, the right boss ball
The height of projection of crown shape is Ht, the maximum open part diameter of a circle of the right boss spherical cap shape is Dt；
Middle boss I is provided on the left of the left flange, the middle boss I is the spherical cap shape of outwardly convex, the convexity
The height of projection of I spherical cap shape of platform is Ht, the maximum open part diameter of a circle of I spherical cap shape of middle boss is Dt；
Middle boss II is provided on the right side of the left flange, the middle boss II is the spherical cap shape of outwardly convex, in described
The height of projection of II spherical cap shape of boss is Ht, the maximum open part diameter of a circle of the left, center, right boss spherical cap shape is Dt；
Middle boss III is provided on the left of the right flange, the middle boss III is the spherical cap shape of outwardly convex, in described
The height of projection of III spherical cap shape of boss is Ht, the maximum open part diameter of a circle of III spherical cap shape of middle boss is Dt；
Middle boss IV is provided on the right side of the right flange, the middle boss IV is the spherical cap shape of outwardly convex, in described
The height of projection of IV spherical cap shape of boss is Ht, the maximum open part diameter of a circle of IV spherical cap shape of middle boss is Dt；
The diameter DtFor explosive diameter D, the height HtFor 3mm~8mm.
2. a kind of surface of revolution three according to claim 1 combines the device that cumulative pressure break increases shale gas recovery ratio,
It is characterized in that,
The rotary shaft of the left concave outer surface is XaThe busbar of axis, the left concave outer surface is busbar A, and the busbar A is around institute
State XaAxis rotates to form the left concave outer surface, and the busbar A is the parabola being made of following equation group：
The rotary shaft of the left concave inside surface is XaThe busbar of axis, the left concave inside surface is busbar B, and the busbar B is around institute
State XaAxis rotates to form the left concave inside surface, and the busbar B is the parabola being made of following equation group：
The rotary shaft of the right concave outer surface is XbThe busbar of axis, the right concave outer surface is busbar C, and the busbar C is around institute
State XbAxis rotates to form the right concave outer surface, and the busbar C is the parabola being made of following equation group：
The rotary shaft of the right concave inside surface is XbThe busbar of axis, the right concave inside surface is busbar D, and the busbar D is around institute
State XbAxis rotates to form the right concave inside surface, and the busbar D is the parabola being made of following equation group：
The rotary shaft of the middle concave outer surface is XcThe busbar of axis, the middle concave outer surface is busbar E, and the busbar E is to open
The outside curve of mouth, the busbar E is around the XcAxis rotates to form the middle concave outer surface；
The rotary shaft of the middle concave inner surface is XcThe busbar of axis, the middle concave inner surface is busbar F, and the busbar F is to open
The outside curve of mouth, the busbar F is around the XcAxis rotates to form the concave inside surface；
In various above：
Oa-XaYaZaThe midpoint of length of the coordinate origin of coordinate system on the axis of the left energy gathering cap and in left energy gathering cap, Xa
Axis, YaAxis and ZaAxis constitutes right hand rectangular coordinate system, XaAxis is overlapped with the axis of the left energy gathering cap, XaAxis positive direction is poly- from a left side
It is directed toward the right side of left energy gathering cap in the left side that can be covered；xa、yaAnd zaRespectively XaAxis, YaAxis and ZaThe coordinate variable of axis；
Oa1-Xa1Ya1Za1The coordinate origin of coordinate system is in Oa-XaYaZaIt is (- b in coordinate system1,c1, 0), Xa1Axis, Ya1Axis and Za1Axis
Constitute right hand rectangular coordinate system, Za1Axis and ZaAxis is parallel, Xa1Axis and XaAxle clamp angle is θa；xa1、ya1And za1Respectively Xa1Axis, Ya1
Axis and Za1The coordinate variable of axis；
Oa2-Xa2Ya2Za2The coordinate origin of coordinate system is in Oa-XaYaZaIt is (- b in coordinate system2,c2, 0), Xa2Axis, Ya2Axis and Za2Axis
Constitute right hand rectangular coordinate system, Za2Axis and ZaAxis is parallel, Xa1Axis and XaAxle clamp angle is θa；xa2、ya2And za2Respectively Xa2Axis, Ya2
Axis and Za2The coordinate variable of axis；
Ob-XbYbZbThe midpoint of length of the coordinate origin of coordinate system on the axis of the right energy gathering cap and in right energy gathering cap, Xb
Axis, YbAxis and ZbAxis constitutes right hand rectangular coordinate system, XbAxis is overlapped with the axis of the right energy gathering cap, XbAxis positive direction is poly- from the right side
It is directed toward the right side of right energy gathering cap in the left side that can be covered；xb、ybAnd zbRespectively XbAxis, YbAxis and ZbThe coordinate variable of axis；
Ob1-Xb1Yb1Zb1The coordinate origin of coordinate system is in Ob-XbYbZbIt is (b in coordinate system1,c1, 0), Xb1Axis, Yb1Axis and Zb1Axis structure
At right hand rectangular coordinate system, Zb1Axis and ZbAxis is parallel, Xb1Axis and XbAxle clamp angle is θb；xb1、yb1And zb1Respectively Xb1Axis, Yb1Axis
And Zb1The coordinate variable of axis；
Ob2-Xb2Yb2Zb2The coordinate origin of coordinate system is in Ob-XbYbZbIt is (b in coordinate system2,c2, 0), Xb2Axis, Yb2Axis and Zb2Axis structure
At right hand rectangular coordinate system, Zb2Axis and ZbAxis is parallel, Xb1Axis and XbAxle clamp angle is θb；xb2、yb2And zb2Respectively Xb2Axis, Yb2Axis
And Zb2The coordinate variable of axis；
Oc-XcYcZcThe midpoint of length of the coordinate origin of coordinate system on the axis of the middle energy gathering cap and in middle energy gathering cap, Xc
Axis, YcAxis and ZcAxis constitutes right hand rectangular coordinate system, XcAxis is overlapped with the axis of the middle energy gathering cap, XcAxis positive direction is therefrom gathered
The right side of energy gathering cap during the left side that can be covered is directed toward；xc、ycAnd zcRespectively XcAxis, YcAxis and ZcThe coordinate variable of axis；
XaAxis, XbAxis and XcAxis is conllinear；
DaAnd DbIt is equal and be D, LaAnd LbIt is equal and be L, θa=-θ, θb=θ；
D is 100mm~800mm, and L is 200mm~1000mm, θ 00~600；
DcFor 100mm~800mm, LcFor 200mm~1000mm；
H is the minimum wall thickness (MINI W.) of left energy gathering cap, middle energy gathering cap and right energy gathering cap, and H is 1mm~10mm；
a1、b1、c1、a2、b2、c2For parameter, c1It is 0.2~0.90 times of D, c2It is 0.15~0.85 times and c of D1>c2；
It solves following equation group and obtains a1、b1Value and a1>0：
It solves following equation group and obtains a2、b2Value and a2>0：
3. a kind of surface of revolution three according to claim 2 combines the device that cumulative pressure break increases shale gas recovery ratio,
It is characterized in that, the busbar E is the parabola being made of following equation：
yc=a3+b3xc 2；
The busbar F is the parabola being made of following equation：
yc=a4+b4xc 2；
In various above：
a3、b3、a4And b4For parameter, a3For Dc0.2~0.90 times, a4For Dc0.15~0.85 times and a3>a4, b3、b4By with
Lower formula calculates：
In formula：e3、e4For coefficient, e3For 0.5~1.5, e4For 0.8~1.8 and e4>e3。
4. a kind of surface of revolution three according to claim 2 combines the device that cumulative pressure break increases shale gas recovery ratio,
It is characterized in that, the busbar E is one section of circular arc, loaded length L of the circular arc center of circle in middle energy gathering capcCentre position and with it is described
XdThe distance of axis is Lc1, arc radius Rc1；
The busbar F is one section of circular arc, loaded length L of the circular arc center of circle in middle energy gathering capcCentre position and with the XdAxis
Distance is Lc2, arc radius Rc2；
Rc1、Rc2、Lc1And Lc2It calculates as follows respectively：
Hc1And Hc2It is sagitta, Hc1For charge diameter Dc0.1~0.4 times, Hc2For charge diameter Dc0.11~0.41 times and
Hc2>Hc1。
5. a kind of surface of revolution three according to claim 2 combines the device that cumulative pressure break increases shale gas recovery ratio,
It is characterized in that, the parameter θ is 45 °, parameter a1、b1、a2、b2Pass sequentially through following formula calculating：
P1=D-L-2c1；
Q1=D+L-2c1；
P2=D-L-2c2-2H；
Q2=D+L-2c2-2H；
The parameter c1It is 0.2~0.6 times of D, c2It is 0.15~0.55 times and c of D1>c2, D is 200mm~500mm, and L is
300mm~600mm, radial minimum wall thickness (MINI W.) H are 1mm~5mm.
6. a kind of surface of revolution three according to claim 3 combines the device that cumulative pressure break increases shale gas recovery ratio,
It is characterized in that, the parameter a3For Dc0.2~0.6 times, a4For Dc0.15~0.55 times and a3>a4, e3For 0.8~1.2, e4
For 1.0~1.4 and e4>e3, DcFor 200mm~500mm, LcFor 300mm~600mm.
7. a kind of surface of revolution three according to claim 4 combines the device that cumulative pressure break increases shale gas recovery ratio,
It is characterized in that, the parameter Hc1For charge diameter Dc0.2~0.35 times, Hc2For charge diameter Dc0.22~0.36 times and Hc2
>Hc1。
8. a kind of surface of revolution three according to claim 3,5 or 6 combines the dress that cumulative pressure break increases shale gas recovery ratio
It sets, which is characterized in that the parameter D=300mm, L=400mm, La=400mm, Lb=400mm, c1=60mm, c2=45mm,
H=2mm, b1=179.0724809mm, a1=0.007938555mm, b2=184.116701mm, a2=0.008717154mm；
Dc=300mm, Lc=400mm, a3=60mm, a4=45mm, e3=0.8, e4=1.0, b3=0.015, b4=
0.001874。
9. a kind of surface of revolution three according to claim 4,5 or 7 combines the dress that cumulative pressure break increases shale gas recovery ratio
It sets, which is characterized in that parameter D=300mm, L=400mm, L described in the parametera=400mm, Lb=400mm, c1=60mm,
c2=45mm, H=2mm, b1=179.0724809mm, a1=0.007938555mm, b2=184.116701mm, a2=
0.008717154mm；
Dc=300mm, Lc=400mm, Hc1=60mm, Hc2=66mm, Rc1=363.333mm, Lc1=453.333mm, Rc2=
336.030mm, Lc1=420.030mm.
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| CN201910190821.9A CN109944577A (en) | 2018-03-14 | 2019-03-13 | A kind of surface of revolution three combines the device of cumulative pressure break increase shale gas recovery ratio |
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| CN109798098A (en) * | 2018-03-14 | 2019-05-24 | 重庆霓裳科技有限公司 | A kind of double combination cumulative pressure breaks of the paraboloid of revolution increase the device of shale gas recovery ratio |
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| CN85203131U (en) * | 1985-07-25 | 1986-10-22 | 淮南矿业学院 | Shape (in bore, two sides) charged cutter for engineering explosion |
| CN102168543B (en) * | 2011-03-17 | 2013-12-04 | 中国科学院力学研究所 | Method and apparatus of improving recovery efficiency of shale gas through a blast mode |
| CN103983153A (en) * | 2014-05-23 | 2014-08-13 | 中国科学技术大学 | Case circular discontinuous energy concentrating jet flow cracker |
| US9428979B2 (en) * | 2014-05-29 | 2016-08-30 | William T. Bell | Shaped charge casing cutter |
| US10422204B2 (en) * | 2015-12-14 | 2019-09-24 | Baker Hughes Incorporated | System and method for perforating a wellbore |
| CN106767182B (en) * | 2017-03-23 | 2018-07-03 | 中国科学技术大学 | A kind of explosion switch based on multi-panel energy-gathering jetting |
| CN107091600A (en) * | 2017-04-07 | 2017-08-25 | 安徽理工大学 | A kind of linear orientation jet cutter |
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