CN109138957A - Liquid explosives injection and apparatus to cause bursting for oil and gas reservoir explosive fracturing - Google Patents
Liquid explosives injection and apparatus to cause bursting for oil and gas reservoir explosive fracturing Download PDFInfo
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- CN109138957A CN109138957A CN201810784353.3A CN201810784353A CN109138957A CN 109138957 A CN109138957 A CN 109138957A CN 201810784353 A CN201810784353 A CN 201810784353A CN 109138957 A CN109138957 A CN 109138957A
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- 239000002360 explosive Substances 0.000 title claims abstract description 351
- 239000007788 liquid Substances 0.000 title claims abstract description 336
- 239000007924 injection Substances 0.000 title claims abstract description 123
- 238000002347 injection Methods 0.000 title claims abstract description 123
- 230000009172 bursting Effects 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 169
- 239000010959 steel Substances 0.000 claims abstract description 169
- 238000012856 packing Methods 0.000 claims abstract description 31
- 238000012546 transfer Methods 0.000 claims abstract description 20
- 238000005474 detonation Methods 0.000 claims description 20
- 238000003825 pressing Methods 0.000 claims description 13
- 239000003380 propellant Substances 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 14
- 238000005755 formation reaction Methods 0.000 abstract description 14
- 239000004215 Carbon black (E152) Substances 0.000 abstract description 8
- 229930195733 hydrocarbon Natural products 0.000 abstract description 8
- 150000002430 hydrocarbons Chemical class 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 29
- 230000009471 action Effects 0.000 description 19
- 230000007246 mechanism Effects 0.000 description 17
- 230000008569 process Effects 0.000 description 17
- 239000003814 drug Substances 0.000 description 15
- 239000000306 component Substances 0.000 description 13
- 238000004880 explosion Methods 0.000 description 13
- 238000007789 sealing Methods 0.000 description 12
- 238000013461 design Methods 0.000 description 11
- 238000006073 displacement reaction Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 229940079593 drug Drugs 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000011435 rock Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000008358 core component Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 238000012163 sequencing technique Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011981 development test Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
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Classifications
-
- 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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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a kind of liquid explosives injection for oil and gas reservoir explosive fracturing and apparatus to cause burstings, including driving unit, cylinder barrel, liquid explosives to inject and open quick-fried unit, driving pressure transfer unit, center steel column, perforated interval elastic packing unit, the first pressure ring；The driving unit is located in the left end of cylinder barrel；The cylinder barrel is fixedly connected with center steel column；The liquid explosives, which inject and open quick-fried unit, to be located in cylinder barrel；The perforated interval elastic packing unit, the first pressure ring are set in outside the steel column of center；The driving pressure transfer unit is located at liquid explosives injection and opens between quick-fried unit and the first pressure ring and run through the junction of cylinder barrel and center steel column.After the present invention closes target perforated interval by driving unit, liquid explosives are injected into stratum by perforation tunnel high pressure；After required explosive charge is injected into stratum, and the momentary status of injection pressure is kept, it is immediately automatic to ignite by the liquid explosives in injection hydrocarbon formations, exploding in fracture pressure break is carried out to oil-gas Layer.
Description
Technical field
The invention belongs to oil gas field completion technique fields, and in particular to a kind of liquid for oil and gas reservoir explosive fracturing is fried
Medicine injection and apparatus to cause bursting.
Background technique
Currently, opening in petroleum gas unconventional shale storage exploitation and the high-quality close low permeability oil and gas field of other routines
It adopts in operation, in Completion Operations, hydraulic fracturing becomes the key means for obtaining industrial flow.However hydraulic fracturing is costly
High, expense has accounted for 50% or more of entire Completion cost, and higher in water shortage oil field fracturing expense.In addition hydraulic fracturing pair
A large amount of consumings of water resource and environmental pollution, cause many negative socials to influence；And in some oil gas fields with a varied topography, greatly
Type hydraulic fracturing vehicle is mobile difficult, also limits the exploitation of these Region of Oil-gas；
Preliminary Results show that stratum explosive fracturing significant effect is better than hydraulic fracturing.But currently, " liquid in stratum
Body explosive charge fracturing technique technique " is not applied in practice in engineering, mainly there is following reason:
1, safety problem: being now arranged in " the liquid explosives explosive fracturing technical matters in stratum " in development test stage, general
It is all over the technical matters method used: using hydraulic fracturing, first opens reservoir fracturing, then is used with hydraulic fracturing vehicle by pit shaft
Liquid explosives are pressed into oil/gas well stratum by high-pressure pump, then are ignited with propellant；This technology method, operating procedure is complicated,
At high cost, the activity duration is long, and liquid explosives dosage is big, and general dosage is differed at 1 to 10 tons, and security reliability is poor, makees to scene
The security level required of industry is high, is easy to produce major safety risks；After ignition, there is relatively high risk that casing is caused to damage or become
Shape or even serious safety accident.
2, without solving in the case where completing to inject and keep the instantaneous state of injection pressure, the technology that safety is ignited immediately is difficult
Topic: in the case where completing that liquid explosives are injected stratum and keep the instantaneous state of injection pressure, the stratum of upper km depth is ignited immediately
Liquid explosives in crack.If cannot be ignited immediately under this working condition, in the liquid explosives and stratum in formation fracture
Oil, water be easy mixing, scatter and disappear, it may appear that liquid explosives cannot cmpletely be ignited, and a large amount of explosives is caused to remain in bottom,
Pollution will be generated to stratum and security risk is caused to the subsequent exploitation of oil gas.
Summary of the invention
In view of this, the main purpose of the present invention is to provide a kind of liquid explosives notes for oil and gas reservoir explosive fracturing
Enter and apparatus to cause bursting.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
The embodiment of the present invention provides a kind of liquid explosives injection for oil and gas reservoir explosive fracturing and apparatus to cause bursting, the dress
It sets including driving unit, cylinder barrel, liquid explosives injection and opens quick-fried unit, driving pressure transfer unit, center steel column, perforated interval bullet
Property sealing unit, the first pressure ring；The driving unit is located in the left end of cylinder barrel；The cylinder barrel is fixedly connected with center steel column；
The liquid explosives, which inject and open quick-fried unit, to be located in cylinder barrel；The perforated interval elastic packing unit, the first pressure ring are set in
Outside the steel column of center；The driving pressure transfer unit is located at liquid explosives injection and opens between quick-fried unit and the first pressure ring and pass through
Wear the junction of cylinder barrel Yu center steel column.
In above scheme, liquid explosives injection and open quick-fried unit include first piston, second piston, hollow steel column,
Open quick-fried component；The first piston and second piston are from left to right successively movably arranged in cylinder barrel, and are formed between the two
First liquid explosives storehouse；The left end of the hollow steel column is connected in second piston, and through the second piston and the first liquid
The connection of body magazine；The right end of the hollow steel column extends in the centre bore of center steel column, and by the first shear pin with
Center steel column is fixed；It is described to open quick-fried component setting in first piston, and its right end is located in the first liquid explosives storehouse.
It is described to open quick-fried component including pressing quick-fried head, the striker that detonates, opening quick-fried bullet, the second shear pin in above scheme；The pressure is quick-fried
Head is fixed on first piston by the second shear pin；The detonation striker is located at the left side for pressing quick-fried head；It is described to open quick-fried bullet and set
It sets in the left side for pressing quick-fried head.
In above scheme, the first T-shaped liquid explosives injector tunnel is provided in the hollow steel column；The central steel
Column, the first pressure ring and the first liquid explosives injector tunnel, which respectively correspond, is provided with second liquid explosive injector tunnel, third liquid
Explosive injector tunnel.
In above scheme, the perforated interval elastic packing unit includes the first elastic seal ring, stop sleeve, the second elasticity
Sealing ring；First elastic seal ring, stop sleeve, the second elastic seal ring are from left to right sequentially sleeved at center steel column
Outside；First pressure ring is between the first elastic seal ring, stop sleeve.
In above scheme, the driving pressure transfer unit includes steel column piston；The left side of the steel column piston and the
The connection of two pistons, right side is abutted with the first elastic seal ring.
In above scheme, which further includes the second pressure ring；Second pressure ring is set in outside the steel column of center and is located at
Between the right side of steel column piston and the first elastic seal ring.
In above scheme, the cylinder barrel is fixedly connected with center steel column by intermediate connector；The steel column piston runs through
Intermediate connector.
In above scheme, the driving unit includes high-pressure pump, high-voltage tube, separator, third upper binding head；Described first
The 4th liquid explosives injector tunnel for being connected to second liquid magazine and the first liquid explosives storehouse is provided on piston, and
The first piston is fixed by the 4th shear pin with third upper binding head；The third upper binding head is located at the left end of cylinder barrel；
The high-pressure pump is connected to by high-voltage tube with third upper binding head；The separator is located in high-voltage tube；The separator and
Region between one piston forms the second liquid magazine of storage liquid explosives.
In above scheme, the driving unit includes upper second upper binding head, high-pressure pump, third shear pin；Described first
Piston is fixed by third shear pin and the second upper binding head；Second upper binding head is located at the left end of cylinder barrel, and with
Liquid cabin is formed between one piston；The high-pressure pump is connected to by the second upper binding head with liquid cabin.
In above scheme, the driving unit includes the first upper binding head, igniter head；First upper binding head is located at cylinder
The left end of cylinder, and propellant storehouse is formed between first piston；The first upper binding head is run through in one end of described igniter head, and
It is arranged in propellant storehouse, the other end and cable connection.
Compared with prior art, the present invention is by driving unit, first closing target perforated interval, then, by liquid explosives
Stratum is injected by perforation tunnel high pressure；After required explosive charge is injected into stratum, and keep the moment shape of injection pressure
State, it is immediately automatic to ignite by the liquid explosives in injection hydrocarbon formations, exploding in fracture pressure break is carried out to oil-gas Layer；The present invention can
Safety, it is controllable, reliably realize this serial procedures.
Detailed description of the invention
Fig. 1 is that the embodiment of the present invention 1 provides a kind of liquid explosives injection for oil and gas reservoir explosive fracturing and ignites dress
The structural schematic diagram set；
Fig. 2 is that the embodiment of the present invention 2 provides a kind of liquid explosives injection for oil and gas reservoir explosive fracturing and ignites dress
The structural schematic diagram set；
Fig. 3 is that the embodiment of the present invention 2 provides a kind of liquid explosives injection for oil and gas reservoir explosive fracturing and ignites dress
The perspective view set；
Fig. 4 is that the embodiment of the present invention 2 provides a kind of liquid explosives injection for oil and gas reservoir explosive fracturing and ignites dress
It sets and completes to inject, i.e., will open quick-fried state moment schematic diagram；
Fig. 5 is that the embodiment of the present invention 3 provides a kind of liquid explosives injection for oil and gas reservoir explosive fracturing and ignites dress
The structural schematic diagram set；
Wherein, 1- driving unit, the first upper binding head of 101-, 102- cable, 103- igniter head, 104- propellant storehouse,
105- third shear pin, 107- liquid cabin, 108- high-voltage tube, 109- separator, connects in 110- third the second upper binding head of 106-
Connector, 111- second liquid magazine；
2- cylinder barrel, 21- safety vent, 22- intermediate connector；
3- liquid explosives inject and open quick-fried unit, 31- first piston, 32- second piston, the hollow steel column of 33-, 34- open it is quick-fried
Component, the first liquid explosives of 35- storehouse；The 4th liquid explosives injector tunnel 311-, the 4th shear pin of 312-, the first liquid of 331- are fried
Medicine injector tunnel, 341- press quick-fried head, 342- detonation striker, 343- to open quick-fried bullet, the second shear pin of 344-；
4- driving pressure transfer unit；
The center 5- steel column, 51- second liquid explosive injector tunnel, the first shear pin of 52-；
6- perforated interval elastic packing unit, the first elastic seal ring of 61-, 62- stop sleeve, the second elastic seal ring of 63-；
The first pressure ring of 7-, 71- third liquid explosives injector tunnel；
The second pressure ring of 8-, 9- guide head, 10- wellbore casing into.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It is to be appreciated that the "left", "right" mentioned in following implementation of the invention is with side shown in each figure
On the basis of, these words for being used to limit direction are intended merely to facilitate explanation, do not represent to particular technique side of the present invention
The limitation of case.
The embodiment of the present invention provides a kind of liquid explosives injection for oil and gas reservoir explosive fracturing and apparatus to cause bursting, the dress
It sets and is injected including driving unit 1, cylinder barrel 2, liquid explosives and open quick-fried unit 3, driving pressure transfer unit 4, center steel column 5, penetrated
Hole section elastic packing unit 6, the first pressure ring 7；The driving unit 1 is located in the left end of cylinder barrel 2；The cylinder barrel 2 and central steel
Column 5 is fixedly connected；The liquid explosives, which inject and open quick-fried unit 3, to be located in cylinder barrel 2；The perforated interval elastic packing unit 6,
One pressure ring 7 is set in outside center steel column 5；The driving pressure transfer unit 4 be located at liquid explosives injection and open quick-fried unit 3 with
Junction between first pressure ring 7 and through cylinder barrel 2 and center steel column 5.
The driving unit 1 forms system drive pressure, under the action of driving pressure, since the liquid in the present invention is fried
Medicine injection channel is in an off state, and the injection process that liquid explosives inject and open quick-fried unit 3 cannot start first, perforated interval bullet
Property the preferential automatic starting target perforated interval of sealing unit 6 sealing；After the pressure-resistant seal for only completing perforated interval two sides, liquid is fried
Medicine injection channel is just able to achieve connection, at this point, under the continuous action of driving unit 1, automatic start liquid explosive injection and
Open quick-fried unit 3；When liquid explosives injection and liquid explosives all extrusion in quick-fried unit 3 are opened, and keep the state of injection pressure
Moment opens quick-fried, propagation of explosion automatically, ignites the liquid explosives in injection stratum；The present invention is in a short time, suitable by system design work
Sequence, respectively automatic starting, reaches the working condition of needs, and complete the function of respectively setting, realizes the explosion pressure to oil-gas Layer
It splits.
Embodiment 1
The embodiment of the present invention 1 provides a kind of liquid explosives injection for oil and gas reservoir explosive fracturing and apparatus to cause bursting, such as
Shown in Fig. 1, the device include driving unit 1, cylinder barrel 2, liquid explosives injection and open quick-fried unit 3, driving pressure transfer unit 4,
Center steel column 5, perforated interval elastic packing unit 6, the first pressure ring 7；The driving unit 1 is located in the left end of cylinder barrel 2；The cylinder
Cylinder 2 is fixedly connected with center steel column 5；The liquid explosives, which inject and open quick-fried unit 3, to be located in cylinder barrel 2；The perforated interval elasticity
Sealing unit 6, the first pressure ring 7 are set in outside center steel column 5；The driving pressure transfer unit 4 is located at liquid explosives injection
And open between quick-fried unit 3 and the first pressure ring 7 and run through the junction of cylinder barrel 2 and center steel column 5.
The driving unit 1 pushes liquid explosives injection and ignition unit 3 to move right for generating pressure, fried in liquid
In medicine injection and ignition 3 moving process of unit, then pressure is passed through into driving pressure transfer unit 4 and is applied to perforated interval elastic packing
On unit 6；After the perforated interval elastic packing unit 6 compresses；Along center steel column 5 while first pressure ring 7 is under pressure
Move right, until perforated interval elastic packing unit 6 be compressed axially reach the upper limit after, the first pressure ring 7 stop movement, at this moment,
Liquid explosives injection and the liquid explosives ignited in unit 3 are injected into stratum by liquid explosives injection channel high pressure, have injected
Cheng Hou ignites liquid explosives.
The driving unit 1 includes high-pressure pump, high-voltage tube 108, separator 109, third upper binding head 110；Described first
The 4th liquid that the inner cavity 113 and the first liquid explosives storehouse 35 for being connected to third upper binding head 110 are provided on piston 31 is fried
Medicine injector tunnel 311, and the first piston 31 is fixed on the right side of third upper binding head 110 by the 4th shear pin 312；
The third upper binding head 110 is located at the left end of cylinder barrel 2；The high-pressure pump is connected by high-voltage tube 108 and third upper binding head 110
It is logical；The separator 109 is located in high-voltage tube 108；Region between the separator 109 and first piston 31 is for storing liquid
The second liquid magazine 111 of body explosive.
The separator 109 can use batching sphere.
The left side of the first piston 31 is spherical concave surface, is infused in this way in the liquid explosives of second liquid magazine 111
After the completion of entering；The separator 109 realizes the cutting to the 4th shear pin 312 with the exact matching of first piston 31.
Be provided with safety vent in the third top connection 110, when pressure be more than safe range, let out by safety vent
Pressure.
Liquid explosives injection and injection and ignition of the quick-fried unit 3 for liquid explosives are opened, including first piston 31, the
Two pistons 32, open quick-fried component 34 at hollow steel column 33；The first piston 31 and the from left to right successively activity setting of second piston 32
In cylinder barrel 2, and the first liquid explosives storehouse 35 is formed between the two；The left end of the hollow steel column 33 is located at second piston 32
Above and through the second piston 32 it is connected to the first liquid explosives storehouse 35；The right end of the hollow steel column 33 extends to central steel
It is in column 5 and fixed by the first shear pin 52 and center steel column 5；It is described open quick-fried component 34 be arranged in first piston 31 and
In the first liquid explosives storehouse 35.
It is described to open quick-fried component 34 for realizing the ignition of liquid explosives, including pressure quick-fried head after the completion of liquid explosives injection
341, detonate striker 342, open quick-fried bullet 343, the second shear pin 344；The quick-fried head 341 of pressure is fixed on by the second shear pin 344
On first piston 31；The detonation striker 342 is located at the left side for pressing quick-fried head 341；It is described to open the quick-fried setting of bullet 343 in the quick-fried head of pressure
341 left side.
Specifically, the right end of the first piston 31 is provided with the Large central aperture of installation Qi Bao mechanism 34, and left end is provided with
The small centre bore of installation detonation striker 342.The right end of the second piston 32 is provided with the Large central aperture for installing hollow steel column 33,
Left end is provided with small centre bore, Large central aperture and small centre bore connection.The left end setting of the hollow steel column 33 is living second
In the Large central aperture for filling in 32 right ends, and connected with being screwed；In the centre bore and second piston 32 of the hollow steel column 33
Heart hole coaxial arrangement, and identical as the aperture of small centre bore of 32 left end of second piston setting, and is interconnected, and with the first liquid
Body magazine 35 is connected to；The right end of the hollow steel column 33 extends in the centre bore of center steel column 5；The Qi Bao mechanism 34 is same
Axle center is arranged in the Large central aperture of 31 right end of first piston, and the quick-fried head 341 of pressure of Qi Bao mechanism 34 stretches out the right side of first piston 31
End face, in the left end in the first liquid explosives storehouse 35.
The quick-fried head 341 of pressure is fixed on first piston 31 by the second shear pin 344；The detonation striker 342 is arranged
In the small centre bore of 31 left end of first piston, and it is located at the left side of Qi Bao mechanism 34；It is described to open the quick-fried setting of bullet 343 in the quick-fried head of pressure
Left end in 341 centre bores.
The first T-shaped liquid explosives injector tunnel 331 is provided in the hollow steel column 33；The center steel column 5,
One pressure ring 7 and the first liquid explosives injector tunnel 331, which respectively correspond, is provided with second liquid explosive injector tunnel 51, third liquid
Explosive injector tunnel 71.
Before liquid explosives injection, first liquid explosives injector tunnel 331, second liquid explosive injector tunnel
51, third liquid explosives injector tunnel 71 is not connected to, under the action of driving unit 1 as power source, finally, described first
Liquid explosives injector tunnel 331, second liquid explosive injector tunnel 51, third liquid explosives injector tunnel 71 form liquid after being connected to
Body explosive injection channel, later, under the pressure of first piston 31, the first liquid explosives storehouse 35 passes through liquid explosives injection channel
It is injected into stratum.
The left end of the hollow steel column 33 is co-axially located in the right end central bore of second piston 32, and is threadedly coupled
It is fixed；The right end of the hollow steel column 33 is disposed coaxially in the central bore of center steel column 5；Hollow steel column 33 and center steel column
It is fixed with the first shear pin 52 between 5.
First shear pin 52 is used for before transport or start-up operation, prevents hollow steel column 33 in center steel column 5
It is interior back and forth to jump, thus also it is prevented that second piston 32 back and forth jumps in cylinder barrel 2.
Liquid explosives are pre-charged in first liquid explosives storehouse 35, when driving unit 1 pushes first piston 31 to the right
When mobile；The first piston 31 generates pressure to liquid explosives, and second piston 32 is pushed to move right；The second piston 32
Pressure is applied to the first elastic seal ring 61 by steel column piston；First elastic seal ring 61 generates axial direction being under pressure
While compression, pressure is applied to the first pressure ring 7；First pressure ring 7 moves right after being under pressure, and pushes support sleeve
Cylinder 62 moves right；The stop sleeve 62 applies pressure to the second elastic seal ring 63 again；Second elastic seal ring 63
It generates and is compressed axially after being under pressure, pass through being compressed axially and to the right for the first elastic seal ring 61 and the second elastic seal ring 63
The displacement difference of generation so that the first pressure ring 7 generates displacement to the right, and cooperatively forms liquid explosives injection with hollow steel column 33
Liquid explosives in first liquid explosives storehouse 35 are injected into stratum by channel；Liquid in first liquid explosives storehouse 35 is fried
After the completion of medicine injection；Liquid explosives are ignited by the Qi Bao mechanism 34.
After first elastic seal ring 61 and the compression of the second elastic seal ring 63, wellbore casing is expressed to being radially expanded
10 inner wall is formed and is closed to the pressure resistance of perforated interval two sides, and liquid explosives are entered by liquid explosives injection channel and are closed
Perforated interval after, then stratum injected by the preforation tunnel on wellbore casing 10.
The band quick-fried head 341 of dynamic pressure moves right while the first piston 31 moves right, when the first liquid explosives storehouse 35
When interior liquid explosives are completely expressed, the left end face contact of the pressure quick-fried head 341 and second piston 32, the pressure of generation is cut
Second shear pin 344, at this moment, under pressure, quick-fried bullet 343 is opened in carrying to the quick-fried head 341 of pressure, along the big-and-middle of first piston 31
Heart hole is moved to the left, and is opened quick-fried bullet 343 until described and is bumped against with detonation striker 342, described to open quick-fried bullet 343 and open quick-fried, liquid explosives note
Enter channel and liquid explosives that perforated interval retains are as booster explosive, ignites the liquid explosives explosion on injection stratum.
The perforated interval elastic packing unit 6 includes the first elastic seal ring 61, stop sleeve 62, the second elastic seal ring
63；First elastic seal ring 61, stop sleeve 62, the second elastic seal ring 63 are from left to right sequentially sleeved at center steel column
Outside 5；First pressure ring 7 is between the first elastic seal ring 61, stop sleeve 62.
It further, further include the second pressure ring 8, it is outer and living positioned at steel column that second pressure ring 8 is set in center steel column 5
Between the right side of plug and the first elastic seal ring 61, in this way, the pressure that the steel column piston applies is uniform by the second pressure ring 8
It is applied on the first elastic seal ring 61, so that being compressed axially for the first elastic seal ring 61 is more stable.
The cylinder barrel 2 is fixedly connected with center steel column 5 by intermediate connector 22；The steel column piston is through intermediate connection
First 22.
Specifically, divide equally on the intermediate connector 22 along axial annular and be provided with 4 to 12 technique through-holes, 4 to 12
Steel column piston passes through intermediate connector 22, and presses against on the left side of the second pressure ring 8；The intermediate connector 22 is that connection is solid
Determine the core component of cylinder barrel 2 and center steel column 5, the internal screw thread of 2 right end of cylinder barrel is connect with the external screw thread of 22 left end of intermediate connector
Fixed, the internal screw thread of intermediate connector 22 and the external screw thread of 5 left end of center steel column are connected and fixed.The steel column piston is located at second
Between piston 32 and the second pressure ring 8, and 4 to 12 fabrication holes being arranged above through intermediate connector 22；Steel column piston
Left end presses against the right side of second piston 32, and the right end of all (4-12 root) steel column pistons presses against the left end of the second pressure ring 8
Face.
It further, further include guiding first 9 into, it is described to guide first 9 right ends for being set in center steel column 5 into.
It is provided on the cylinder barrel 2 on safety vent 21 and the second upper binding head 106 and is also equipped with safety vent, in this way, such as
Pressure in fruit cylinder barrel 2 is more than safe range, carries out pressure release by safety vent 21.
The course of work that each unit of the embodiment of the present invention starts sequencing automatically is as follows:
(1) starting of driving unit 1:
At least one high-voltage tube 108 is socketed in third top connection 110 by the liquid explosives weight injected as needed, selection
On, the present invention is transported to the target position i.e. target perforated interval of wellbore casing 10, liquid explosives are injected into high-voltage tube 108
Second liquid magazine 111, until separator 109 is put into high-voltage tube 108, later, is passed through after reaching the explosive charge of design
High-pressure pump is to the pressurization injection pressure liquid of high-voltage tube 108, and at this moment, the pressure fluid generates driving pressure F, and the separator 109 exists
It under the pressure of pressure fluid, moves right, pressure is generated to the liquid explosives for being injected into second liquid magazine 111 before, due to
The position-limiting action of 4th shear pin 312, the first piston 31 will not generate displacement, and liquid explosives pass through on first piston 31
4th liquid explosives injector tunnel 311 is injected into the first liquid explosives storehouse 35, at this point, liquid explosives injection channel, which is in, disconnects shape
State, at this moment, the driving unit 1 start, that is, the present invention opens work.
It should be noted that being previously implanted a part of liquid explosives in first liquid explosives storehouse 35 before going into the well
As isolation explosive, first piston 31 and second piston 31 are isolated.
(2) the seal process starting of perforated interval:
After driving unit 1 of the invention is opened, liquid explosives injection channel is in an off state, therefore, in driving pressure F
Under the action of, the preferential automatic starting of perforated interval elastic packing unit 6 for closing target perforated interval.
Driving pressure F is passed to second piston 32 by the liquid explosives in the first liquid explosives storehouse 35, and is transmitted
Pressure be more than the first shear pin 52 carrying after, the first shear pin 52 is cut, and the second piston 32 moves right, will
Pressure passes to steel column piston, and steel column piston runs through intermediate connector 22 and pressure is passed to the second pressure ring 8, and the second pressure ring 8 will
Pressure passes to the first elastic seal ring 61, and pressure is passed to the first pressure ring 7 by the first elastic seal ring 61, and the first pressure ring 7 is logical
It crosses stop sleeve 62 and pressure is passed into the second elastic seal ring 63, the second elastic seal ring 63, which passes to pressure, guides first 9 into.
In the transmittance process of pressure above, driving pressure F persistently rises, and makes second piston 32, the first elastic seal ring
61, stop sleeve 62, the second elastic seal ring 63 generate to the right displacement, meanwhile, the first elastic seal ring 61 and the second elasticity are close
By axial high-pressure extrusion, the axial width of the first elastic seal ring 61 and the second elastic seal ring 63 becomes smaller 63 two sides of seal,
First elastic seal ring 61 and the second elastic seal ring 63 are to being radially expanded, until squeezed tight to 10 inner wall of wellbore casing, in fact
Now to the high-pressure-resistant sealed at perforated interval both ends, and being compressed axially when the first elastic seal ring 61 and the second elastic seal ring 63
Deformation is when reaching the deflection of design requirement, namely ensure that the resistance to voltage levels of the sealing for reaching design requirement, this is from having sealed
At the key node for starting injection to next step.
(3) the automatic starting of liquid explosives injection stratum process:
When the axial crushing deformation of the first elastic seal ring 61 and the second elastic seal ring 63 reaches the deformation of design requirement
When amount, under the action of driving pressure F, the both ends of first liquid explosives injector tunnel 331 and second liquid explosive inject
Duct 51 is docked and connected, the third liquid explosives injector tunnel on second liquid explosive injector tunnel 51 and the first pressure ring 7
71 are docked and connected, to realize the whole connection of liquid explosives injection channel, and then realize that liquid explosives injection of the invention is logical
The connection in road and preforation tunnel and hydrocarbon formations, at this moment, liquid explosives start to inject stratum.
Under the action of driving pressure F, the liquid in second liquid magazine 111 and the first liquid explosives storehouse 35 is fried
The liquid explosives injection channel that medicine has stepped through connection is injected into stratum.
(4) instant pressure opens the automatic starting of quick-fried, propagation of explosion, explosive fracturing process:
After liquid explosives in second liquid magazine 111 are all forced out, the separator 109 and first piston 1
Left end face contact, the 4th liquid explosives injector tunnel 311 is closed, the pressure of first piston 31 is risen, is cut more than the 4th
After cutting the carrying upper limit of pin 312, the 4th shear pin 312 is cut, and the first piston 31 moves right, will be in the
Liquid explosives in one liquid explosives storehouse 35 all extrude.
Liquid explosives in the first liquid explosives storehouse 35 are completely expressed, and under driving pressure F continuous action, are kept
The moment of injection pressure presses quick-fried head 341 to strike the left side of second piston 32, cuts the second shear pin 344, at this moment, described
Press quick-fried head 341 under pressure, quick-fried bullet 343 is opened in carrying, and the Large central aperture along first piston 31 is moved to the left, and detonate striker
342 bump against with quick-fried bullet 343 is opened, and open quick-fried bullet 343 and open quick-fried, the liquid explosives that liquid explosives injection channel and perforated interval retain are as passing
Quick-fried medicine ignites the liquid explosives having been injected into hydrocarbon formations, realizes exploding in fracture pressure break.
Due to being closed the liquid explosives retained in the wellbore casing 10 of perforated interval, after ignition with wellbore casing 10 outside near
Liquid explosives in stratum, the impact force generated after ignition can cancel out each other, and reduce the impact to wellbore casing 10；It completes
Injection, and is kept for the moment of injection pressure ignite immediately, and liquid explosives can be effectively reduced and mix in stratum with water and oil
It closes and liquid explosives is in the lost of stratum, to guarantee, the liquid explosives for injecting stratum can sufficiently be ignited, and solve because of nothing
Method is sufficiently ignited, and a great deal of explosive or explosive composition is caused to remain in the problem in stratum.
Using pit shaft as axle center, the interior liquid explosives in eyelet surrounding formations crack of injection preforation tunnel, according to injection liquid
The explosive charge of body explosive after explosion, can produce 10-30 meters of diameter of detonation area, and Explosive stress wave is 30-60 meters extensible, because
This, the present invention about 30-60 meters of range can generate chicken-wire cracking area around pit shaft, achieve the effect that volume fracturing.
Ground exploding in fracture pressure break is a dynamic process, under the impact loading of certain loading speed, is formed a plurality of
Random radial fissure, fracture surface are no longer normal to the direction of minimum principal stress.Due to the shear action of crustal stress, these
Off axial effect will be generated between fracture surface, makes that small dislocation occurs between the wall surface of crack, thus cannot be former after unloading crack
Bit recovery closure, forms the crack with higher permeability.Meanwhile rock generates under the high pressure effect for being more than yield limit
Expendable plastic deformation makes crack still keep certain remaining slit width after unloading.In addition, stress wave opposite joint face rock
It peels off, certain rock debris can be generated；Meanwhile high temperature and high pressure gas can destroy near fracture surface during extending crack
Rock texture, to generate certain rock debris, these clasts also play the effect of support to microcrack.
Embodiment 2
The embodiment of the present invention 2 provides a kind of liquid explosives injection for oil and gas reservoir explosive fracturing and apparatus to cause bursting, such as
Shown in Fig. 2-4, which includes driving unit 1, cylinder barrel 2, liquid explosives injection and opens quick-fried unit 3, driving pressure transfer unit
4, center steel column 5, perforated interval elastic packing unit 6, the first pressure ring 7；The driving unit 1 is located in the left end of cylinder barrel 2；It is described
Cylinder barrel 2 is fixedly connected with center steel column 5；The liquid explosives, which inject and open quick-fried unit 3, to be located in cylinder barrel 2；The perforated interval bullet
Property sealing unit 6, the first pressure ring 7 are set in outside center steel column 5；The driving pressure transfer unit 4 is located at liquid explosives note
Enter and open between quick-fried unit 3 and the first pressure ring 7 and run through the junction of cylinder barrel 2 and center steel column 5.
The driving unit 1 pushes liquid explosives injection and ignition unit 3 to move right for generating pressure, fried in liquid
In medicine injection and ignition 3 moving process of unit, then pressure is passed through into driving pressure transfer unit 4 and is applied to perforated interval elastic packing
On unit 6；After the perforated interval elastic packing unit 6 compresses, while first pressure ring 7 is under pressure, along center steel column 5
Move right, until perforated interval elastic packing unit 6 be compressed axially reach the upper limit after, the first pressure ring 7 stop movement, at this moment,
Liquid explosives injection and the liquid explosives ignited in unit 3 are injected into stratum by liquid explosives injection channel high pressure, have injected
Cheng Hou ignites liquid explosives.
The driving unit 1 includes upper second upper binding head 106, high-pressure pump, third shear pin 105；The first piston
31 are fixed on the right side of the second upper binding head 106 by third shear pin 105；Second upper binding head 106 is located at cylinder barrel 2
Left end and the formation liquid cabin 107 between first piston 31；The high-pressure pump passes through the second upper binding head 106 and liquid cabin
107 connections.
The third shear pin 105 is used for before transport or start-up operation, prevents first piston 31 from back and forth jumping.
Liquid explosives injection and open quick-fried unit 3 include first piston 31, second piston 32, hollow steel column 33, open it is quick-fried
Component 34；The first piston 31 and second piston 32 are from left to right successively movably arranged in cylinder barrel 2, and shape between the two
At the first liquid explosives storehouse 35；The left end of the hollow steel column 33 be located in second piston 32 and through the second piston 32 with
The connection of first liquid explosives storehouse 35；The right end of the hollow steel column 33 extends in center steel column 5 and by the first shear pin
52 is fixed with center steel column 5；It is described to open the quick-fried setting of component 34 in first piston 31 and be located in the first liquid explosives storehouse 35.
It is described to open quick-fried component 34 including pressing quick-fried head 341, detonation striker 342, opening quick-fried bullet 343, the second shear pin 344；It is described
Quick-fried head 341 is pressed to be fixed on first piston 31 by the second shear pin 344；The detonation striker 342 is located at the left side for pressing quick-fried head 341
End face；It is described to open quick-fried bullet 343 left side for pressing quick-fried head 341 is set.
Specifically, the right end of the first piston 31 is provided with the Large central aperture of installation Qi Bao mechanism 34, and left end is provided with
The small centre bore of installation detonation striker 342.The right end of the second piston 32 is provided with the Large central aperture for installing hollow steel column 33,
Left end is provided with small centre bore, Large central aperture and small centre bore connection.The left end setting of the hollow steel column 33 is living second
In the Large central aperture for filling in 32 right ends, and connected with being screwed；In the centre bore and second piston 32 of the hollow steel column 33
Heart hole coaxial arrangement, and identical as the aperture of small centre bore of 32 left end of second piston setting, and is interconnected, and with the first liquid
Body magazine 35 is connected to；The right end of the hollow steel column 33 extends in the centre bore of center steel column 5；The Qi Bao mechanism 34 is same
Axle center is arranged in the Large central aperture of 31 right end of first piston, and the quick-fried head 341 of pressure of Qi Bao mechanism 34 stretches out the right side of first piston 31
End face, in the left end in the first liquid explosives storehouse 35.
The quick-fried head 341 of pressure is fixed on first piston 31 by the second shear pin 344；The detonation striker 342 is arranged
In the small centre bore of 31 left end of first piston, and it is located at the left side of Qi Bao mechanism 34；It is described to open the quick-fried setting of bullet 343 in the quick-fried head of pressure
Left end in 341 centre bores.
The first T-shaped liquid explosives injector tunnel 331 is provided in the hollow steel column 33；The center steel column 5,
One pressure ring 7 and the first liquid explosives injector tunnel 331, which respectively correspond, is provided with second liquid explosive injector tunnel 51, third liquid
Explosive injector tunnel 71.
Before liquid explosives injection, first liquid explosives injector tunnel 331, second liquid explosive injector tunnel
51, third liquid explosives injector tunnel 71 is not connected to, under the action of driving unit 1 as power source, finally, described first
Liquid explosives injector tunnel 331, second liquid explosive injector tunnel 51, third liquid explosives injector tunnel 71 form liquid after being connected to
Body explosive injection channel, later, under the pressure of first piston 31, the first liquid explosives storehouse 35 passes through liquid explosives injection channel
High pressure is injected into stratum.
The left end of the hollow steel column 33 is co-axially located in the right end central bore of second piston 32, and is threadedly coupled
It is fixed；The right end of the hollow steel column 33 is disposed coaxially in the central bore of center steel column 5；Hollow steel column 33 and center steel column
It is fixed with the first shear pin 52 between 5.
First shear pin 52 is used for before transport or start-up operation, prevents hollow steel column 33 in center steel column 5
It is interior back and forth to jump, thus also it is prevented that second piston 32 back and forth jumps in cylinder barrel 2.
Liquid explosives are pre-charged in first liquid explosives storehouse 35, when driving unit 1 pushes first piston 31 to the right
When mobile；The first piston 31 generates pressure to liquid explosives, and second piston 32 is pushed to move right；The second piston 32
Pressure is applied to the first elastic seal ring 61 by steel column piston；First elastic seal ring 61 generates axial direction being under pressure
While compression, pressure is applied to the first pressure ring 7；First pressure ring 7 moves right after being under pressure, and pushes support sleeve
Cylinder 62 moves right；The stop sleeve 62 applies pressure to the second elastic seal ring 63 again；Second elastic seal ring 63
It generates and is compressed axially after being under pressure, pass through being compressed axially and to the right for the first elastic seal ring 61 and the second elastic seal ring 63
The displacement difference of generation so that the first pressure ring 7 generates displacement to the right, and cooperatively forms liquid explosives injection with hollow steel column 33
Liquid explosives in first liquid explosives storehouse 35 are injected into stratum by channel；Liquid in first liquid explosives storehouse 35 is fried
After the completion of medicine injection；Liquid explosives are ignited by the Qi Bao mechanism 34.
It is being radially expanded after first elastic seal ring 61 and the compression of the second elastic seal ring 63, in this way, and shaft sleeve
Perforated interval is formed between pipe 10, after entering perforated interval by liquid explosives injection channel, if then passing through on wellbore casing 10
Dry preforation tunnel high pressure injects stratum.
The band quick-fried head 341 of dynamic pressure moves right while the first piston 31 moves right, when the first liquid explosives storehouse 35
When interior liquid explosives are completely expressed, the left end face contact of the pressure quick-fried head 341 and second piston 32, the pressure of generation is cut
Second shear pin 344, at this moment, under pressure, quick-fried bullet 343 is opened in carrying to the quick-fried head 341 of pressure, along the big-and-middle of first piston 31
Heart hole is moved to the left, and is opened quick-fried bullet 343 until described and is bumped against with detonation striker 342, described to open quick-fried bullet 343 and open quick-fried, liquid explosives note
Enter channel and liquid explosives that perforated interval retains are as booster explosive, ignites the liquid explosives explosion on injection stratum.
The perforated interval elastic packing unit 6 includes the first elastic seal ring 61, stop sleeve 62, the second elastic seal ring
63；First elastic seal ring 61, stop sleeve 62, the second elastic seal ring 63 are from left to right sequentially sleeved at center steel column
Outside 5；First pressure ring 7 is between the first elastic seal ring 61, stop sleeve 62.
It further, further include the second pressure ring 8, it is outer and living positioned at steel column that second pressure ring 8 is set in center steel column 5
Between the right side of plug and the first elastic seal ring 61, in this way, the pressure that the steel column piston applies is uniform by the second pressure ring 8
It is applied on the first elastic seal ring 61, so that being compressed axially for the first elastic seal ring 61 is more stable.
The cylinder barrel 2 is fixedly connected with center steel column 5 by intermediate connector 22；The steel column piston is through intermediate connection
First 22.
Specifically, divide equally on the intermediate connector 22 along axial annular and be provided with 4 to 12 technique through-holes, 4 to 12
Steel column piston passes through intermediate connector 22, and presses against on the left side of the second pressure ring 8；The intermediate connector 22 is that connection is solid
Determine the core component of cylinder barrel 2 and center steel column 5, the internal screw thread of 2 right end of cylinder barrel is connect with the external screw thread of 22 left end of intermediate connector
Fixed, the internal screw thread of intermediate connector 22 and the external screw thread of 5 left end of center steel column are connected and fixed.The steel column piston is located at second
Between piston 32 and the second pressure ring 8, and 4 to 12 fabrication holes being arranged above through intermediate connector 22；Steel column piston
Left end presses against the right side of second piston 32, and the right end of all (4-12 root) steel column pistons presses against the left end of the second pressure ring 8
Face.
It further, further include guiding first 9 into, it is described to guide first 9 right ends for being set in center steel column 5 into.
It is provided on the cylinder barrel 2 on safety vent 21 and the second upper binding head 106 and is also equipped with safety vent, in this way, such as
Pressure in fruit cylinder barrel 2 is more than safe range, carries out pressure release by safety vent 21.
The course of work that each unit of the embodiment of the present invention starts sequencing automatically is as follows:
(1) starting of driving unit 1:
High-pressure pump by pipeline and is arranged in 2 left end of cylinder barrel preset liquid explosives in first liquid explosives storehouse 35
The connection of the second upper binding head 106, the present invention is transported to the target position i.e. target perforated interval of wellbore casing 10, passes through high pressure
It pumps to the pressurization injection pressure liquid of liquid cabin 107, at this point, the pressure fluid generates driving pressure F, and liquid explosives injection channel
It is in an off state；At this moment, the driving unit 1 starts, that is, the present invention opens work.
(2) the seal process starting of perforated interval:
After driving unit 1 of the invention is opened, liquid explosives injection channel is in an off state, therefore, in driving pressure F
Under the action of, the preferential automatic starting of perforated interval elastic packing unit 6 for closing target perforated interval.
As the driving pressure F of driving unit 1 rises, the pressure of first piston 31 is risen, more than the 4th shear pin 312
The carrying upper limit after, the 4th shear pin 312 is cut, and the first piston 31 moves right, and passes through the liquid in cylinder barrel 2
Driving pressure F is passed to second piston 32 by body explosive；The pressure for passing to second piston 32 is more than holding for the first shear pin 52
After load, first shear pin 52 is cut, and the second piston 32 moves right, and pressure is passed to steel column piston, steel
Pressure is passed to the second pressure ring 8 through intermediate connector 22 by column piston, and pressure is passed to the first elastic packing by the second pressure ring 8
Circle 61, pressure is passed to the first pressure ring 7 by the first elastic seal ring 61, and the first pressure ring 7 is transmitted pressure by stop sleeve 62
To the second elastic seal ring 63, the second elastic seal ring 63, which passes to pressure, guides first 9 into.
In the transmittance process of pressure above, driving pressure F persistently rises, and makes first piston 31, second piston 32, first
Elastic seal ring 61, stop sleeve 62, the second elastic seal ring 63 generate to the right displacement, meanwhile, 61 He of the first elastic seal ring
Second elastic seal ring, 63 two sides are by axial high-pressure extrusion, the axial direction of the first elastic seal ring 61 and the second elastic seal ring 63
Width becomes smaller, and the first elastic seal ring 61 and the second elastic seal ring 63 are to being radially expanded, until squeezed tight to wellbore casing
10 inner walls realize the high-pressure-resistant sealed to perforated interval both ends；And when the first elastic seal ring 61 and the second elastic seal ring 63
When axial crushing deformation reaches the deflection of design requirement, namely it ensure that the resistance to voltage levels of the sealing for reaching design requirement, this is
The key node injected since being accomplished in next step sealing.
(3) the automatic starting of liquid explosives injection stratum process:
When the axial crushing deformation of the first elastic seal ring 61 and the second elastic seal ring 63 reaches the deformation of design requirement
When amount, under the action of driving pressure F, the both ends of first liquid explosives injector tunnel 331 and second liquid explosive inject
Duct 51 is docked and connected, the third liquid explosives injector tunnel on second liquid explosive injector tunnel 51 and the first pressure ring 7
71 are docked and connected, to realize the whole connection of liquid explosives injection channel, and then realize that liquid explosives injection of the invention is logical
The connection in road and preforation tunnel and hydrocarbon formations, at this moment, liquid explosives start to inject stratum.
Under the action of driving pressure F, the first piston 31 moves right, the liquid in the first liquid explosives storehouse 35
The liquid explosives injection channel that body explosive has stepped through connection is injected into stratum.
(4) instant pressure opens the automatic starting of quick-fried, propagation of explosion, explosive fracturing process:
Under driving pressure F continuous action, the liquid explosives in the first liquid explosives storehouse 35 are completely expressed, and keep infusing
The moment for entering pressure presses quick-fried head 341 to strike the left side of second piston 32, cuts the second shear pin 344, at this moment, the pressure
Under pressure, quick-fried bullet 343 is opened in carrying to quick-fried head 341, and the Large central aperture along first piston 31 is moved to the left, and detonate striker 342
Bump against with quick-fried bullet 343 is opened, opens quick-fried bullet 343 and open quick-fried, the liquid explosives that liquid explosives injection channel and perforated interval retain are as propagation of explosion
Medicine ignites the liquid explosives having been injected into hydrocarbon formations, realizes exploding in fracture pressure break.
Due to being closed the liquid explosives retained in the wellbore casing 10 of perforated interval, after ignition with wellbore casing 10 outside near
Explosive in stratum, the impact force generated after ignition can cancel out each other, and reduce the impact to wellbore casing 10；Injection is completed,
And kept for the moment of injection pressure ignite immediately, can be effectively reduced liquid explosives in stratum with water and oil mixing and
Liquid explosives scatter and disappear stratum, to guarantee, the liquid explosives for injecting stratum can sufficiently be ignited, and solve because being unable to fully
It ignites, and a great deal of explosive or explosive composition is caused to remain in the problem in stratum.
Using pit shaft as axle center, with the liquid explosives in eyelet surrounding formations crack in injection preforation tunnel, after explosion, can produce
Raw diameter 10-30 meter of detonation area, Explosive stress wave may extend away 30-60 meters, therefore, the present invention can around pit shaft about 30-
60 meters of ranges generate chicken-wire cracking area, achieve the effect that volume fracturing.
Embodiment 3
The embodiment of the present invention 3 provides a kind of liquid explosives injection for oil and gas reservoir explosive fracturing and apparatus to cause bursting, such as
Shown in Fig. 5, the device include driving unit 1, cylinder barrel 2, liquid explosives injection and open quick-fried unit 3, driving pressure transfer unit 4,
Center steel column 5, perforated interval elastic packing unit 6, the first pressure ring 7；The driving unit 1 is located in the left end of cylinder barrel 2；The cylinder
Cylinder 2 is fixedly connected with center steel column 5；The liquid explosives, which inject and open quick-fried unit 3, to be located in cylinder barrel 2；The perforated interval elasticity
Sealing unit 6, the first pressure ring 7 are set in outside center steel column 5；The driving pressure transfer unit 4 is located at liquid explosives injection
And open between quick-fried unit 3 and the first pressure ring 7 and run through the junction of cylinder barrel 2 and center steel column 5.
The driving unit 1 pushes liquid explosives injection and ignition unit 3 to move right for generating pressure, fried in liquid
In medicine injection and ignition 3 moving process of unit, then pressure is passed through into driving pressure transfer unit 4 and is applied to perforated interval elastic packing
On unit 6；After the perforated interval elastic packing unit 6 compresses, along center steel column 5 while first pressure ring 7 is under pressure
Move right, until perforated interval elastic packing unit 6 be compressed axially reach the upper limit after, the first pressure ring 7 stop movement, at this moment,
Liquid explosives injection and the liquid explosives ignited in unit 3 are injected into stratum by liquid explosives injection channel, after the completion of injection,
Liquid explosives are ignited.
The driving unit 1 includes the first upper binding head 101, igniter head 103；First upper binding head 101 is located at cylinder
The left end of cylinder 2 and the formation propellant storehouse 104 between first piston 31；One end of described igniter head 103 connects on first
Connector 101 is arranged in propellant storehouse 104, and the other end is connect by cable 102 with the ignition mechanism being located at outside cylinder barrel 2.
Be provided with safety vent in first top connection 101, when pressure be more than safe range, let out by safety vent
Pressure.
Liquid explosives injection and open quick-fried unit 3 include first piston 31, second piston 32, hollow steel column 33, open it is quick-fried
Component 34；The first piston 31 and second piston 32 are from left to right successively movably arranged in cylinder barrel 2, and shape between the two
At the first liquid explosives storehouse 35；The left end of the hollow steel column 33 be located in second piston 32 and through the second piston 32 with
The connection of first liquid explosives storehouse 35；The right end of the hollow steel column 33 extends in center steel column 5 and by the first shear pin
52 is fixed with center steel column 5；It is described to open the quick-fried setting of component 34 in first piston 31 and be located in the first liquid explosives storehouse 35.
It is described to open quick-fried component 34 including pressing quick-fried head 341, detonation striker 342, opening quick-fried bullet 343, the second shear pin 344；It is described
Quick-fried head 341 is pressed to be fixed on first piston 31 by the second shear pin 344；The detonation striker 342 is located at the left side for pressing quick-fried head 341
End face；It is described to open quick-fried bullet 343 left side for pressing quick-fried head 341 is set.
Specifically, the right end of the first piston 31 is provided with the Large central aperture of installation Qi Bao mechanism 34, and left end is provided with
The small centre bore of installation detonation striker 342.The right end of the second piston 32 is provided with the Large central aperture for installing hollow steel column 33,
Left end is provided with small centre bore, Large central aperture and small centre bore connection.The left end setting of the hollow steel column 33 is living second
In the Large central aperture for filling in 32 right ends, and connected with being screwed；In the centre bore and second piston 32 of the hollow steel column 33
Heart hole coaxial arrangement, and identical as the aperture of small centre bore of 32 left end of second piston setting, and is interconnected, and with the first liquid
Body magazine 35 is connected to；The right end of the hollow steel column 33 extends in the centre bore of center steel column 5；The Qi Bao mechanism 34 is same
Axle center is arranged in the Large central aperture of 31 right end of first piston, and the quick-fried head 341 of pressure of Qi Bao mechanism 34 stretches out the right side of first piston 31
End face, in the left end in the first liquid explosives storehouse 35.
The quick-fried head 341 of pressure is fixed on first piston 31 by the second shear pin 344；The detonation striker 342 is arranged
In the small centre bore of 31 left end of first piston, and it is located at the left side of Qi Bao mechanism 34；It is described to open the quick-fried setting of bullet 343 in the quick-fried head of pressure
Left end in 341 centre bores.
The first T-shaped liquid explosives injector tunnel 331 is provided in the hollow steel column 33；The center steel column 5,
One pressure ring 7 and the first liquid explosives injector tunnel 331, which respectively correspond, is provided with second liquid explosive injector tunnel 51, third liquid
Explosive injector tunnel 71.
Before liquid explosives injection, first liquid explosives injector tunnel 331, second liquid explosive injector tunnel
51, third liquid explosives injector tunnel 71 is not connected to, under the action of driving unit 1 as power source, finally, described first
Liquid explosives injector tunnel 331, second liquid explosive injector tunnel 51, third liquid explosives injector tunnel 71 form liquid after being connected to
Body explosive injection channel, later, under the pressure of first piston 31, the first liquid explosives storehouse 35 passes through liquid explosives injection channel
It is injected into stratum.
The left end of the hollow steel column 33 is co-axially located in the right end central bore of second piston 32, and is threadedly coupled
It is fixed；The right end of the hollow steel column 33 is disposed coaxially in the central bore of center steel column 5；Hollow steel column 33 and center steel column
It is fixed with the first shear pin 52 between 5.
First shear pin 52 is used for before transport or start-up operation, prevents hollow steel column 33 in center steel column 5
It is interior back and forth to jump, thus also it is prevented that second piston 32 back and forth jumps in cylinder barrel 2.
Liquid explosives are pre-charged in first liquid explosives storehouse 35, when driving unit 1 pushes first piston 31 to the right
When mobile；The first piston 31 generates pressure to liquid explosives, and second piston 32 is pushed to move right；The second piston 32
Pressure is applied to the first elastic seal ring 61 by steel column piston；First elastic seal ring 61 generates axial direction being under pressure
While compression, pressure is applied to the first pressure ring 7；First pressure ring 7 moves right after being under pressure, and pushes support sleeve
Cylinder 62 moves right；The stop sleeve 62 applies pressure to the second elastic seal ring 63 again；Second elastic seal ring 63
It generates and is compressed axially after being under pressure, pass through being compressed axially and to the right for the first elastic seal ring 61 and the second elastic seal ring 63
The displacement difference of generation so that the first pressure ring 7 generates displacement to the right, and cooperatively forms liquid explosives injection with hollow steel column 33
Liquid explosives in first liquid explosives storehouse 35 are injected into stratum by channel；Liquid in first liquid explosives storehouse 35 is fried
After the completion of medicine injection；Liquid explosives are ignited by the Qi Bao mechanism 34.
It is being radially expanded after first elastic seal ring 61 and the compression of the second elastic seal ring 63, in this way, and shaft sleeve
Perforated interval is formed between pipe 10, after entering perforated interval by liquid explosives injection channel, if then passing through on wellbore casing 10
Dry preforation tunnel high pressure injects stratum.
The band quick-fried head 341 of dynamic pressure moves right while the first piston 31 moves right, when the first liquid explosives storehouse 35
When interior liquid explosives are completely expressed, the left end face contact of the pressure quick-fried head 341 and second piston 32, the pressure of generation is cut
Second shear pin 344, at this moment, under pressure, quick-fried bullet 343 is opened in carrying to the quick-fried head 341 of pressure, along the big-and-middle of first piston 31
Heart hole is moved to the left, and is opened quick-fried bullet 343 until described and is bumped against with detonation striker 342, described to open quick-fried bullet 343 and open quick-fried, liquid explosives note
Enter channel and liquid explosives that perforated interval retains are as booster explosive, ignites the liquid explosives explosion on injection stratum.
The perforated interval elastic packing unit 6 includes the first elastic seal ring 61, stop sleeve 62, the second elastic seal ring
63；First elastic seal ring 61, stop sleeve 62, the second elastic seal ring 63 are from left to right sequentially sleeved at center steel column
Outside 5；First pressure ring 7 is between the first elastic seal ring 61, stop sleeve 62.
It further, further include the second pressure ring 8；It is outer and living positioned at steel column that second pressure ring 8 is set in center steel column 5
Between the right side of plug and the first elastic seal ring 61, in this way, the pressure that the steel column piston applies is uniform by the second pressure ring 8
It is applied on the first elastic seal ring 61, so that being compressed axially for the first elastic seal ring 61 is more stable.
The cylinder barrel 2 is fixedly connected with center steel column 5 by intermediate connector 22；The steel column piston is through intermediate connection
First 22.
Specifically, divide equally on the intermediate connector 22 along axial annular and be provided with 4 to 12 technique through-holes, 4 to 12
Steel column piston passes through intermediate connector 22, and presses against on the left side of the second pressure ring 8；The intermediate connector 22 is that connection is solid
Determine the core component of cylinder barrel 2 and center steel column 5, the internal screw thread of 2 right end of cylinder barrel is connect with the external screw thread of 22 left end of intermediate connector
Fixed, the internal screw thread of intermediate connector 22 and the external screw thread of 5 left end of center steel column are connected and fixed.The steel column piston is located at second
Between piston 32 and the second pressure ring 8, and 4 to 12 fabrication holes being arranged above through intermediate connector 22；Steel column piston
Left end presses against the right side of second piston 32, and the right end of all (4-12 root) steel column pistons presses against the left end of the second pressure ring 8
Face.
It further, further include guiding first 9 into；It is described to guide first 9 right ends for being set in center steel column 5 into.
It is provided on the cylinder barrel 2 on safety vent 21 and the second upper binding head 106 and is also equipped with safety vent, in this way, such as
Pressure in fruit cylinder barrel 2 is more than safe range, carries out pressure release by safety vent 21.
The course of work that each unit of the embodiment of the present invention starts sequencing automatically is as follows:
(1) starting of driving unit 1:
The present invention is transported to the target position of wellbore casing 10 by preset liquid explosives in first liquid explosives storehouse 35
That is target perforated interval, the ignition mechanism pass through 102 point of ignition duration and degree of heating 103 of cable；Described igniter head 103 ignites propellant storehouse
Propellant in 104, propellant combustion and generates driving pressure F, and liquid explosives injection channel is in an off state；This
When, the driving unit 1 starts, that is, the present invention opens work.
(2) seal process of perforated interval:
After driving unit 1 of the invention is opened, liquid explosives injection channel is in an off state, therefore, in driving pressure F
Under the action of, the preferential automatic starting of perforated interval elastic packing unit 6 for closing target perforated interval.
As the driving pressure F of driving unit 1 rises, the pressure of first piston 31 is risen, more than the 4th shear pin 312
The carrying upper limit after, the 4th shear pin 312 is cut, and the first piston 31 moves right, and passes through the liquid in cylinder barrel 2
Driving pressure F is passed to second piston 32 by body explosive；The pressure for passing to second piston 32 is more than holding for the first shear pin 52
After load, first shear pin 52 is cut, and the second piston 32 moves right, and pressure is passed to steel column piston, steel
Pressure is passed to the second pressure ring 8 through intermediate connector 22 by column piston, and pressure is passed to the first elastic packing by the second pressure ring 8
Circle 61, pressure is passed to the first pressure ring 7 by the first elastic seal ring 61, and the first pressure ring 7 is transmitted pressure by stop sleeve 62
To the second elastic seal ring 63, the second elastic seal ring 63, which passes to pressure, guides first 9 into.
In the transmittance process of pressure above, driving pressure F persistently rises, and makes first piston 31, second piston 32, first
Elastic seal ring 61, stop sleeve 62, the second elastic seal ring 63 generate to the right displacement, meanwhile, 61 He of the first elastic seal ring
Second elastic seal ring, 63 two sides are by axial high-pressure extrusion, the axial direction of the first elastic seal ring 61 and the second elastic seal ring 63
Width becomes smaller, and the first elastic seal ring 61 and the second elastic seal ring 63 are to being radially expanded, until squeezed tight to wellbore casing
10 inner walls realize the high-pressure-resistant sealed to perforated interval both ends；And when the first elastic seal ring 61 and the second elastic seal ring 63
When axial crushing deformation reaches the deflection of design requirement, namely it ensure that the resistance to voltage levels of the sealing for reaching design requirement, this is
The key node injected since being accomplished in next step sealing.
(3) the automatic starting of liquid explosives injection stratum process:
When the axial crushing deformation of the first elastic seal ring 61 and the second elastic seal ring 63 reaches the deformation of design requirement
When amount, under the action of driving pressure F, the both ends of first liquid explosives injector tunnel 331 and second liquid explosive inject
Duct 51 is docked and connected, the third liquid explosives injector tunnel on second liquid explosive injector tunnel 51 and the first pressure ring 7
71 are docked and connected, to realize the whole connection of liquid explosives injection channel, and then realize that liquid explosives injection of the invention is logical
The connection in road and preforation tunnel and hydrocarbon formations, at this moment, liquid explosives start to inject stratum.
Under the action of driving pressure F, the first piston 31 moves right, the liquid in the first liquid explosives storehouse 35
The liquid explosives injection channel that body explosive has stepped through connection is injected into stratum.
(4) instant pressure opens the automatic starting of quick-fried, propagation of explosion, explosive fracturing process:
Under driving pressure F continuous action, the liquid explosives in the first liquid explosives storehouse 35 are completely expressed, and keep infusing
The moment for entering pressure presses quick-fried head 341 to strike the left side of second piston 32, cuts the second shear pin 344, at this moment, the pressure
Under pressure, quick-fried bullet 343 is opened in carrying to quick-fried head 341, and the Large central aperture along first piston 31 is moved to the left, and detonate striker 342
Bump against with quick-fried bullet 343 is opened, opens quick-fried bullet 343 and open quick-fried, the liquid explosives that liquid explosives injection channel and perforated interval retain are as propagation of explosion
Medicine ignites the liquid explosives having been injected into hydrocarbon formations, realizes exploding in fracture pressure break.
Due to being closed the explosive retained in the wellbore casing 10 of perforated interval, after ignition with wellbore casing 10 outside nearby stratum
Interior explosive, the impact force generated after ignition can cancel out each other, and reduce the impact to wellbore casing 10；Injection is completed, and is protected
The moment for holding injection pressure ignites immediately, can be effectively reduced liquid explosives in stratum with water and oil mixing and liquid
Explosive scatters and disappears stratum, to guarantee, the liquid explosives for injecting stratum can sufficiently be ignited, and solve because being unable to fully draw
It is quick-fried, and a great deal of explosive or explosive composition is caused to remain in the problem in stratum.
Using pit shaft as axle center, with the liquid explosives in eyelet surrounding formations crack in injection preforation tunnel, after explosion, can produce
Raw diameter 10-30 meter of detonation area, Explosive stress wave may extend away 30-60 meters, therefore, the present invention can around pit shaft about 30-
60 meters of ranges generate chicken-wire cracking area, achieve the effect that volume fracturing.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (11)
1. a kind of liquid explosives injection and apparatus to cause bursting for oil and gas reservoir explosive fracturing, which is characterized in that the device includes
Driving unit, cylinder barrel, liquid explosives inject and open quick-fried unit, driving pressure transfer unit, center steel column, perforated interval elastic packing
Unit, the first pressure ring；The driving unit is located in the left end of cylinder barrel；The cylinder barrel is fixedly connected with center steel column；The liquid
Body explosive, which injects and opens quick-fried unit, to be located in cylinder barrel；The perforated interval elastic packing unit, the first pressure ring are set in central steel
Outside column；The driving pressure transfer unit is located at liquid explosives injection and opens between quick-fried unit and the first pressure ring and through cylinder barrel
With the junction of center steel column.
2. the liquid explosives injection and apparatus to cause bursting according to claim 1 for oil and gas reservoir explosive fracturing, feature
Be: the liquid explosives, which inject and open quick-fried unit, to be included first piston, second piston, hollow steel column, opens quick-fried component；Described
One piston and second piston are from left to right successively movably arranged in cylinder barrel, and form the first liquid explosives storehouse between the two；
The left end of the hollow steel column is connected in second piston, and is connected to through the second piston with the first liquid explosives storehouse；Institute
The right end for stating hollow steel column extends in the centre bore of center steel column, and is fixed by the first shear pin and center steel column；Institute
It states and opens quick-fried component setting in first piston, and its right end is located in the first liquid explosives storehouse.
3. the liquid explosives injection and apparatus to cause bursting according to claim 2 for oil and gas reservoir explosive fracturing, feature
It is: described to open quick-fried component including pressing quick-fried head, the striker that detonates, opening quick-fried bullet, the second shear pin；The quick-fried head of pressure passes through the second shearing
Pin is fixed on first piston；The detonation striker is located at the left side for pressing quick-fried head；It is described to open quick-fried bullet the left side for pressing quick-fried head is set
Side.
4. the liquid explosives injection and apparatus to cause bursting according to claim 3 for oil and gas reservoir explosive fracturing, feature
It is: is provided with the first T-shaped liquid explosives injector tunnel in the hollow steel column；The center steel column, the first pressure ring with
First liquid explosives injector tunnel, which respectively corresponds, is provided with second liquid explosive injector tunnel, third liquid explosives injector tunnel.
5. the liquid explosives injection and ignition dress according to any one of claims 1-4 for oil and gas reservoir explosive fracturing
It sets, it is characterised in that: the perforated interval elastic packing unit includes the first elastic seal ring, stop sleeve, the second elastic packing
Circle；First elastic seal ring, stop sleeve, the second elastic seal ring are from left to right sequentially sleeved at outside the steel column of center；Institute
The first pressure ring is stated between the first elastic seal ring, stop sleeve.
6. the liquid explosives injection and apparatus to cause bursting according to claim 5 for oil and gas reservoir explosive fracturing, feature
Be: the driving pressure transfer unit includes steel column piston；The left side of the steel column piston is connect with second piston, right end
Face is abutted with the first elastic seal ring.
7. the liquid explosives injection and apparatus to cause bursting according to claim 6 for oil and gas reservoir explosive fracturing, feature
It is, which further includes the second pressure ring；Second pressure ring is set in the right end for outside the steel column of center and being located at steel column piston
Between face and the first elastic seal ring.
8. the liquid explosives injection and apparatus to cause bursting according to claim 7 for oil and gas reservoir explosive fracturing, feature
Be: the cylinder barrel is fixedly connected with center steel column by intermediate connector；The steel column piston runs through intermediate connector.
9. the liquid explosives injection and apparatus to cause bursting according to claim 8 for oil and gas reservoir explosive fracturing, feature
Be: the driving unit includes high-pressure pump, high-voltage tube, separator, third upper binding head；It is arranged on the first piston useful
In the 4th liquid explosives injector tunnel of connection second liquid magazine and the first liquid explosives storehouse, and the first piston is logical
The 4th shear pin is crossed to fix with third upper binding head；The third upper binding head is located at the left end of cylinder barrel；The high-pressure pump passes through
High-voltage tube is connected to third upper binding head；The separator is located in high-voltage tube；Area between the separator and first piston
Domain forms the second liquid magazine of storage liquid explosives.
10. the liquid explosives injection and apparatus to cause bursting according to claim 8 for oil and gas reservoir explosive fracturing, feature
Be: the driving unit includes upper second upper binding head, high-pressure pump, third shear pin；The first piston is cut by third
Pin is cut to fix with the second upper binding head；Second upper binding head is located at the left end of cylinder barrel, and is formed between first piston
Liquid cabin；The high-pressure pump is connected to by the second upper binding head with liquid cabin.
11. the liquid explosives injection and apparatus to cause bursting according to claim 8 for oil and gas reservoir explosive fracturing, feature
Be: the driving unit includes the first upper binding head, igniter head；First upper binding head is located at the left end of cylinder barrel, and
Propellant storehouse is formed between first piston；The first upper binding head is run through in one end of described igniter head, and is arranged in propellant
In storehouse, the other end and cable connection.
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| CN201810784353.3A CN109138957B (en) | 2018-07-17 | 2018-07-17 | Liquid explosive injection and detonation device for oil and gas reservoir explosion fracturing |
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| CN110485960A (en) * | 2019-08-12 | 2019-11-22 | 屈波 | Pipeline compound lining device |
| CN113898330A (en) * | 2021-10-14 | 2022-01-07 | 中国石油大学(华东) | Horizontal well open hole section methane in-situ perforation, combustion, explosion and fracturing integrated device and method |
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| CN109339761A (en) * | 2018-11-16 | 2019-02-15 | 吴继先 | Fluid injection and apparatus to cause bursting for oil and gas reservoir |
| CN109339761B (en) * | 2018-11-16 | 2024-06-25 | 屈波 | Fluid injection and detonation device for hydrocarbon reservoirs |
| CN109681204A (en) * | 2019-02-02 | 2019-04-26 | 屈波 | Fluid injection and apparatus to cause bursting for oil and gas reservoir |
| WO2020155612A1 (en) * | 2019-02-02 | 2020-08-06 | 屈波 | Fluid injection and detonation device for petroleum and gas reservoir |
| CN110306966A (en) * | 2019-07-22 | 2019-10-08 | 屈波 | Liquid explosives injection and exploding in fracture fracturing device for oil-gas casing well |
| WO2021012288A1 (en) * | 2019-07-22 | 2021-01-28 | 屈波 | Liquid explosive injection and in-reservoir explosion fracturing device for oil-gas cased borehole |
| CN110485960A (en) * | 2019-08-12 | 2019-11-22 | 屈波 | Pipeline compound lining device |
| CN113898330A (en) * | 2021-10-14 | 2022-01-07 | 中国石油大学(华东) | Horizontal well open hole section methane in-situ perforation, combustion, explosion and fracturing integrated device and method |
| CN113898330B (en) * | 2021-10-14 | 2024-02-02 | 中国石油大学(华东) | An integrated device and method for methane in-situ perforation, combustion and fracturing in the open-hole section of horizontal wells |
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