CN208845160U

CN208845160U - A kind of liquid explosives injection of oil and gas reservoir explosive fracturing and apparatus to cause bursting

Info

Publication number: CN208845160U
Application number: CN201821133482.8U
Authority: CN
Inventors: 屈波
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-07-17
Filing date: 2018-07-17
Publication date: 2019-05-10
Anticipated expiration: 2028-07-17

Abstract

The utility model discloses a kind of injection of the liquid explosives of 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 utility model 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

A kind of liquid explosives injection of oil and gas reservoir explosive fracturing and apparatus to cause bursting

Technical field

The utility model belongs to oil gas field completion technique field, and in particular to a kind of liquid of 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.

Utility model content

In view of this, the main purpose of the utility model is to provide a kind of liquid explosives of oil and gas reservoir explosive fracturing notes Enter and apparatus to cause bursting.

In order to achieve the above objectives, the technical solution of the utility model is achieved in that

The liquid explosives that the utility model embodiment provides a kind of oil and gas reservoir explosive fracturing inject 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 utility model is by driving unit, first closing target perforated interval, then, by liquid Explosive injects stratum by perforation tunnel high pressure；After required explosive charge is injected into stratum, and kept for the wink of injection pressure Between 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；This is practical It is novel safely, controllably, reliably to realize this serial procedures.

Detailed description of the invention

Fig. 1 injects and ignites dress for the liquid explosives that the utility model embodiment 1 provides a kind of oil and gas reservoir explosive fracturing The structural schematic diagram set；

Fig. 2 injects and ignites dress for the liquid explosives that the utility model embodiment 2 provides a kind of oil and gas reservoir explosive fracturing The structural schematic diagram set；

Fig. 3 injects and ignites dress for the liquid explosives that the utility model embodiment 2 provides a kind of oil and gas reservoir explosive fracturing The perspective view set；

Fig. 4 injects and ignites dress for the liquid explosives that the utility model embodiment 2 provides a kind of oil and gas reservoir explosive fracturing It sets and completes to inject, i.e., will open quick-fried state moment schematic diagram；

Fig. 5 injects and ignites dress for the liquid explosives that the utility model embodiment 3 provides a kind of oil and gas reservoir explosive fracturing 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 purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.

It is to be appreciated that "left", "right" mentioned in the following implementation of the utility model is shown in each figure Direction on the basis of, these, which are used to limit the words in direction, is intended merely to facilitate explanation, does not represent to the utility model tool The limitation of body technique scheme.

The liquid explosives that the utility model embodiment provides a kind of oil and gas reservoir explosive fracturing inject 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, due to the liquid in the utility model Body explosive injection channel is in an off state, and the injection process that liquid explosives inject and open quick-fried unit 3 cannot start first, perforation The sealing of the preferential automatic starting target perforated interval of section elastic packing unit 6；After the pressure-resistant seal for only completing perforated interval two sides, liquid Body explosive injection channel is just able to achieve connection, at this point, under the continuous action of driving unit 1, automatic start liquid explosive note Enter and open quick-fried unit 3；When liquid explosives injection and liquid explosives all extrusion in quick-fried unit 3 are opened, and keep injection pressure State moment opens quick-fried, propagation of explosion automatically, ignites the liquid explosives in injection stratum；The utility model in a short time, is set by system Job order is counted, respectively automatic starting, reaches the working condition of needs, and complete the function of respectively setting, realize to oil-gas Layer Explosive fracturing.

Embodiment 1

The liquid explosives that the utility model embodiment 1 provides a kind of oil and gas reservoir explosive fracturing inject 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 utility model embodiment 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 utility model is transported to the target position i.e. target perforated interval of wellbore casing 10, liquid explosives are injected into high-voltage tube Separator 109 is put into high-voltage tube 108 after reaching the explosive charge of design by the second liquid magazine 111 in 108, it Afterwards, by high-pressure pump to the pressurization injection pressure liquid of high-voltage tube 108, at this moment, the pressure fluid generates driving pressure F, the isolation Part 109 moves right under the pressure of pressure fluid, generates pressure to the liquid explosives for being injected into second liquid magazine 111 before Power, due to the position-limiting action of the 4th shear pin 312, the first piston 31 will not generate displacement, and liquid explosives are living by first The 4th liquid explosives injector tunnel 311 on plug 31 is injected into the first liquid explosives storehouse 35, at this point, at liquid explosives injection channel In off-state, at this moment, the driving unit 1 starts, that is, the utility model 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 the driving unit 1 of the utility model is opened, liquid explosives injection channel is in an off state, and therefore, is being driven The preferential automatic starting of perforated interval elastic packing unit 6 under the action of pressure F, 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 the liquid explosives note of the utility model Enter the connection in channel Yu 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 utility model 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 liquid explosives that the utility model embodiment 2 provides a kind of oil and gas reservoir explosive fracturing inject 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.

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.

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.

(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 second upper binding head 106 connection, the utility model is transported to the target position i.e. target perforated interval of wellbore casing 10, is passed through High-pressure pump is to the pressurization injection pressure liquid of liquid cabin 107, at this point, the pressure fluid generates driving pressure F, and liquid explosives inject Channel is in an off state；At this moment, the driving unit 1 starts, that is, the utility model opens work.

(2) the seal process starting of 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:

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.

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 meters of detonation area, Explosive stress wave is 30-60 meters extensible, and therefore, the utility model can be around pit shaft about 30-60 meters of ranges generate chicken-wire cracking area, achieve the effect that volume fracturing.

Embodiment 3

The liquid explosives that the utility model embodiment 3 provides a kind of oil and gas reservoir explosive fracturing inject 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.

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.

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.

(1) starting of driving unit 1:

The utility model, is transported to the target of wellbore casing 10 by preset liquid explosives in first liquid explosives storehouse 35 Position, 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 Propellant in storehouse 104, propellant combustion and generates driving pressure F, and liquid explosives injection channel is in an off state； At this moment, the driving unit 1 starts, that is, the utility model opens work.

(2) seal process of perforated interval:

(3) the automatic starting of liquid explosives injection stratum process:

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.

The above, the only preferred embodiment of the utility model, are not intended to limit the protection of the utility model Range.

Claims

1. a kind of liquid explosives of oil and gas reservoir explosive fracturing inject and apparatus to cause bursting, 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 list Member, 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 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 center steel column Outside；The driving pressure transfer unit be located at liquid explosives injection and open between quick-fried unit and the first pressure ring and through cylinder barrel with The junction of center steel column.

2. a kind of liquid explosives of oil and gas reservoir explosive fracturing according to claim 1 inject and apparatus to cause bursting, 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. a kind of liquid explosives of oil and gas reservoir explosive fracturing according to claim 2 inject and apparatus to cause bursting, 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. a kind of liquid explosives of oil and gas reservoir explosive fracturing according to claim 3 inject and apparatus to cause bursting, 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. a kind of liquid explosives of oil and gas reservoir explosive fracturing according to any one of claims 1-4 inject and ignite dress 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. a kind of liquid explosives of oil and gas reservoir explosive fracturing according to claim 5 inject and apparatus to cause bursting, 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. a kind of liquid explosives of oil and gas reservoir explosive fracturing according to claim 6 inject and apparatus to cause bursting, 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. a kind of liquid explosives of oil and gas reservoir explosive fracturing according to claim 7 inject and apparatus to cause bursting, feature Be: the cylinder barrel is fixedly connected with center steel column by intermediate connector；The steel column piston runs through intermediate connector.

9. a kind of liquid explosives of oil and gas reservoir explosive fracturing according to claim 8 inject and apparatus to cause bursting, feature Be: the driving unit includes high-pressure pump, high-voltage tube, separator, third upper binding head；The liquid explosives are injected and are opened quick-fried The 4th liquid explosives note for being connected to second liquid magazine and the first liquid explosives storehouse is provided on the first piston of unit Enter duct, and first piston is fixed by the 4th shear pin with third upper binding head；The third upper binding head is located at cylinder barrel Left end；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 isolation Region between part and first piston forms the second liquid magazine of storage liquid explosives.

10. a kind of liquid explosives of oil and gas reservoir explosive fracturing according to claim 8 inject and apparatus to cause bursting, feature Be: the driving unit includes upper second upper binding head, high-pressure pump, third shear pin；The liquid explosives are injected and are opened quick-fried The first piston of unit is fixed by third shear pin and the second upper binding head；Second upper binding head is located at a left side for cylinder barrel End, and liquid cabin is formed between first piston；The high-pressure pump is connected to by the second upper binding head with liquid cabin.

11. a kind of liquid explosives of oil and gas reservoir explosive fracturing according to claim 8 inject and apparatus to cause bursting, 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 It injects and opens with liquid explosives and form propellant storehouse between the first piston of quick-fried unit；One end of described igniter head is on first Connector, and be arranged in propellant storehouse, the other end and cable connection.