CN108397180A - Underground coal mine hydraulic fracturing high pressure sealing continuously adds aggregate system and method - Google Patents
Underground coal mine hydraulic fracturing high pressure sealing continuously adds aggregate system and method Download PDFInfo
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- CN108397180A CN108397180A CN201810280741.8A CN201810280741A CN108397180A CN 108397180 A CN108397180 A CN 108397180A CN 201810280741 A CN201810280741 A CN 201810280741A CN 108397180 A CN108397180 A CN 108397180A
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- 239000003245 coal Substances 0.000 title claims abstract description 52
- 238000007789 sealing Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 104
- 239000012530 fluid Substances 0.000 claims abstract description 62
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 34
- 210000000988 bone and bone Anatomy 0.000 claims description 17
- 238000013461 design Methods 0.000 claims description 17
- 238000011049 filling Methods 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 230000002744 anti-aggregatory effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000009288 screen filtration Methods 0.000 claims description 3
- 208000002925 dental caries Diseases 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 14
- 239000004576 sand Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000003667 anti-reflective effect Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000002245 particle 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
-
- 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
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A kind of underground coal mine hydraulic fracturing high pressure sealing continuously adds aggregate system and method, system may include at least one plus aggregate device, high pressure fracture pump group and pneumatic for aggregate tank, pneumatic be connected to for aggregate tank adds aggregate device, aggregate offer can be provided, it is described pneumatic also to pass through underground air feed system for aggregate tank, it will be quantified for aggregate tank aggregate, constant speed provides aggregate to mixing system, the high pressure fracture pump group is connected to plus aggregate device is to provide pressure, described plus aggregate device is connected to the fracturing borehole in pressure break object coal seam, alternate relay realizes the continuous work of sand fracturing；The present invention supplies high pressure fracturing liquid by front end underground huge discharge, high pressure frac pump group in the construction process as a result, divides two-way to convey using high pressure resistant manifold, provides aggregate and pressure break hydraulic hybrid type power all the way；Another way, which enters, mixes aggregate room, is mixed with aggregate, that is, ensure that fracturing fluid and the uniform hybrid power of aggregate, also ensure aggregate and pressure break mixing match.
Description
Technical field
The present invention relates to the technical field of underground coal mine hydraulic fracturing enhanced gas extraction more particularly to a kind of underground coal mine waterpower
Pressure break high pressure sealing continuously adds aggregate system and method, the device and method in the construction process by front end underground huge discharge,
High pressure frac pump group supplies high pressure fracturing liquid, divides two-way to convey using high pressure resistant manifold, provides aggregate and pressure break all the way
Hydraulic hybrid type power；Another way, which enters, mixes aggregate room, is mixed with aggregate, that is, ensure that fracturing fluid and aggregate, uniformly mixing is dynamic
Power also ensures aggregate and pressure break mixing match.
Background technology
China is one of coal mine gas disaster country the most serious in the world, with the continuous increasing of coal mining depth
Add, the broken soft, low-permeable in coal seam, high methane content, high methane pressure, the feature of high outburst hazard become increasingly conspicuous, and exploit item
Part more deteriorates.Coal seam permeability is integrally relatively low, and 72% is accounted for less than 1mD, and nearly 27% is accounted for more than 1.0mD, more than 10mD's
Seldom, cause that underground gas extraction concentration is low, decaying is fast, the phase up to standard is long, gas exceeding limit when seam mining causes coal mine excavation to connect
For unbalance, gas safety hidden danger is serious, accident still happens occasionally.The anti-reflection skill of coal bed gas extraction is all being researched and developed energetically both at home and abroad at present
Art forces to link up the preexisting crack in coal seam by various technological means or generates new Fracture Networks, gas permeability of coal seam is made to increase
Add, and then improves gas pumping effect.
A large amount of application practice proves that hydraulic fracturing is a kind of single low-permeability coal seam permeability of increase, improves gas pumping
The effective technology of effect.Existing underground coal mine hydraulic fracturing anti-reflection technology application focuses primarily upon riverfrac treatment, free from flaw support
Agent application, the gas migration crack passage that pressure break is formed reduces under the effect of formation closure pressure to be even completely closed, and coal is influenced
Layer antireflective effect.Some scholars and researcher have carried out underground sand fracturing device and anti-reflection technology exploration, but are limited to device
Function restriction, whole that there are a sand feeding amount is few, mulling is uneven plus sand break time length, takes the problems such as sand particle is small, causes
Pressure reduction is apparent in fracturing borehole, and fracturing fluid takes the attenuating of sand flow speed, and borehole fracturing supports radius small, antireflective effect unobvious etc.
Phenomenon.
For this purpose, the designer of the present invention, in view of drawbacks described above, by concentrating on studies and designing, synthesis is engaged in phase for many years for a long time
The experience and achievement of pass industry, research and design go out a kind of coal mine hydraulic fracturing high pressure sealing and continuously add aggregate device and filling work
Skill, to overcome drawbacks described above.
Invention content
It is an object of the invention to solve the technical problem present in the prior art, a kind of underground coal mine hydraulic fracturing is provided
High pressure sealing continuously adds aggregate system and method, and the aggregate amount of preserving is big, strong, the mixed aggregate uniformity of filling continuity is good, device
Safe operation, conveniently, coal seam antireflective effect more, are applicable in more extensive.
To solve the above problems, the invention discloses a kind of underground coal mine hydraulic fracturing high pressure sealings continuously to add aggregate system
System, including at least one plus aggregate device, it is characterised in that described plus aggregate device includes：
Mixed aggregate room 12 is set to 24 top of power turbine storehouse, in be divided to for upper and lower two cavitys by aggregate sieve 9,
Setting aggregate stirs big impeller 10 and aggregate stirring small impeller 11 and connects the first high pressure fracture liquid outlet 16 in middle lower chamber；Its
Upper cavity, which connects the first high pressure fracture liquid entrance 7 and is connected to, adds aggregate pipe 2；
Power turbine 13 is arranged inside in power turbine storehouse 24, and it is high to be connected with the second high pressure fracture liquid entrance 19 and second
Press fracturing fluid outlet 22；
The power turbine 13 and the agitator arm 10,11 is coaxial and provide power for it.
Wherein, including pneumatic for aggregate tank, the pneumatic outlet connection for aggregate tank is described to add aggregate pipe 2, and well is used in combination
Lower air feed system supplies aggregate to mixed aggregate room 12.
Wherein, the first high pressure fracture liquid exports the 16, first high pressure fracture liquid entrance 7, the second high pressure fracture liquid entrance 19, the
Two high pressure fracture liquid export 22 and add is both provided with the high-pressure solenoid valve controlled for aperture on aggregate pipe 2.
Wherein, the mixed aggregate room 12 is provided with circular anti-aggregate baffle 6 in the top of aggregate sieve 9, to prevent
Only aggregate splashing during whipping process and screen filtration and mix the collision and abrasion of aggregate chamber interior walls.
Wherein, described plus aggregate device is two or more, respectively adds the first high pressure fracture liquid entrance 7 of aggregate device
It is connected to high pressure fracture pump group, the first high pressure fracture liquid outlet 16 and the second high pressure pressure with the second high pressure fracture liquid entrance 19
It splits liquid outlet 22 and is connected to pressure break object coal seam, described plus aggregate pipe 2 is connected to pneumatic for aggregate tank.
A kind of method that underground coal mine hydraulic fracturing high pressure sealing as described above continuously adds aggregate system is also disclosed,
It is characterized in that including the following steps：
Step 1：According to the reservoir characteristic in the aperture of fracturing borehole, length and pressure break object coal seam, fracturing fluid injection is completed
Amount and aggregate fill Proportionality design；
Step 2：Two plus aggregate device are parallel to pressure break pump group, is pneumatic between aggregate tank, fracturing borehole；
Step 3：Aggregate is filled to two plus aggregate device for aggregate tank using pneumatic, aggregate is filled mixed aggregate room, passed through
Respectively plus the first high pressure fracture liquid entrance of aggregate device and the second high pressure fracture liquid entrance are respectively to power turbine storehouse and mixed aggregate
Room supplies high pressure fracture liquid, is mixed and stirred for uniform aggregate and fracturing fluid；
Step 4：The first high pressure fracture liquid entrance and the outlet of the first high pressure fracture liquid of wherein one plus aggregate device are opened,
It proceeds by and adds aggregate hydraulic operation；
Step 5：After the completion of the aggregate and fracturing fluid of wherein one plus aggregate device inject, another plus aggregate device is opened
The first high pressure fracture liquid entrance and the outlet of the first high pressure fracture liquid, carried out using another plus aggregate device plus aggregate waterpower applied
Work simultaneously closes off the first high pressure fracture liquid outlet of wherein one plus aggregate device, it is carried out aggregate filling and, until its internal pressure
It splits liquid and is uniformly mixed with aggregate and filled it up with；
Step 6：After the completion of another plus aggregate device aggregate and fracturing fluid injection, carry out adding bone using aggregate device is added
Expect hydraulic operation, simultaneously close off another plus aggregate device, realizes circulate operation.
A kind of method that underground coal mine hydraulic fracturing high pressure sealing as described above continuously adds aggregate system is also disclosed,
It is characterized in that including the following steps：
Step 1：According to the reservoir characteristic in the aperture of fracturing borehole, length and pressure break object coal seam, fracturing fluid injection is completed
Amount and aggregate fill Proportionality design；
Step 2：It connects pressure break pump group, two plus aggregate device and pneumatic for aggregate tank, according to pressure break pump group flow and adds
Aggregate designs, and setting is pneumatic for aggregate tank and each high-voltage electromagnetic valve opening；
Step 3：Close the first high pressure fracture liquid outlet the 16, second high pressure fracture liquid outlet 22 of two plus mixed aggregate device
High-voltage electromagnetic valve group, open the high-voltage electromagnetic valve group of the first high pressure fracture liquid entrance 7, and start pneumatic for aggregate tank, carry out
Two filling for adding aggregate and fracturing fluid in mixed aggregate device；
Step 4：Aggregate is completed with after fracturing fluid filling, aggregate filler pipe is closed, opens the second of two plus mixed aggregate device
The high-voltage electromagnetic valve group of high pressure fracture liquid entrance and the outlet of the second high pressure fracture liquid, implements stirring, after stirring evenly, opens wherein
The high-voltage electromagnetic valve group of one the first high pressure fracture liquid entrance for adding aggregate device and the outlet of the first high pressure fracture liquid, proceeds by
Add aggregate hydraulic operation；
Step 5：After the completion of the aggregate and fracturing fluid of this wherein one plus aggregate device inject, another plus bone are opened
The high-voltage electromagnetic valve group for expecting the first high pressure fracture liquid entrance and the outlet of the first high pressure fracture liquid of device, realizes that hydraulic operation adds bone
The switching for expecting device simultaneously closes off completion of having constructed plus aggregate device the first high pressure fracture liquid entrance and the first high pressure fracture
The high-voltage electromagnetic valve group of liquid outlet, and add mixed aggregate device to carry out closing after fracturing fluid is uniformly mixed and fills it up with aggregate this and be somebody's turn to do
Add aggregate device adds aggregate pipe；
Step 6：Circulating repetition, until fracturing fluid and aggregate adding amount reach design value.
It can be seen from the above content that the underground coal mine hydraulic fracturing high pressure sealing of the present invention continuously adds aggregate system and method
It has the following effects that：
1. the present invention underground coal mine hydraulic fracturing high pressure sealing continuously add aggregate device, devise can remote control height
Pressure electromagnetic valve group can switch the time for directly controlling and adding aggregate and fracturing fluid injection, and adjustable solenoid valve block by " key "
Aperture accurately controls aggregate and fracturing fluid proportioning, improves pressing crack construction precision and safety；
2. the underground coal mine hydraulic fracturing high pressure sealing of the present invention continuously adds aggregate device, pass through front end in the construction process
Underground huge discharge, high pressure frac pump group supply high pressure fracturing liquid, divide two-way to convey using high pressure resistant manifold, provide all the way
Aggregate and pressure break hydraulic hybrid type power；Another way, which enters, mixes aggregate room, is mixed with aggregate, that is, ensure that fracturing fluid and aggregate are equal
Even hybrid power also ensures aggregate and pressure break mixing match.
3 add aggregate device to be provided with power turbine and the large and small impeller of aggregate stirring, can be synchronized under drive bearing effect
Rotation carries out the stirring of aggregate and fracturing fluid, ensure that the mixing uniformity of fracturing fluid and aggregate；
4. being filled in the present invention, technique is provided with 2 plus aggregate device is used alternatingly, when 1 plus aggregate device are being pressed
It when splitting construction, is operated by long-range pneumatic valve group, another 1 of control adds aggregate device to carry out release and adds aggregate.
5. the underground coal mine hydraulic fracturing high pressure sealing of the present invention continuously adds aggregate device, using pneumatic resevoir sand tank to adding bone
Expect unit feeding aggregate, and controlled provided with high-voltage electromagnetic valve group, realizes the aggregate that device is automatic, controllable, continuous, quantitative and add
Note, adition process personnel improve the safety of construction far from operations involving high pressure scene.
The detailed content of the present invention can be obtained by aftermentioned explanation and institute's attached drawing.
Description of the drawings
Fig. 1 is that the underground coal mine hydraulic fracturing high pressure sealing of the present invention continuously adds the schematic diagram of aggregate system；
Fig. 2 is that the underground coal mine hydraulic fracturing high pressure sealing of the present invention continuously adds the diagrammatic cross-section of aggregate device；
Reference numeral：
1. the first high-voltage electromagnetic valve group, 2. add aggregate pipe, 3. second high-voltage electromagnetic valve groups, 4. upper end sealing covers, 5. transmissions
Axis, 6. anti-aggregate baffles, 7. first high pressure fracture liquid entrances, 8. pressure break pipelines, 9. aggregate sieves, 10. aggregates stir big impeller,
11. aggregate stirring small impeller, 12. mixed aggregate rooms, 13. power turbines, 14. third high-voltage electromagnetic valve groups, 15. pressure break pipelines, 16.
First high pressure fracture liquid exports, 17. the 4th high-voltage electromagnetic valve groups, 18. pressure break pipelines, 19. second high pressure fracture liquid entrances, and 20.
Pedestal, 21. the 5th high-voltage electromagnetic valve groups, the outlet of 22. second high pressure fracture liquid, 23. pressure break pipelines, 24. power turbine storehouses；A
One adds aggregate device；B second plus aggregate device；C high pressure fracture pump groups；D is pneumatic for aggregate tank；D1First goes out aggregate mouth；D2Second
Go out aggregate mouth 2；D3The pneumatic piping connection mouth in underground；E pressure break objects coal seam；F fracturing boreholes.
Specific implementation mode
Referring to Fig. 1, it is shown that underground coal mine hydraulic fracturing high pressure sealing of the invention continuously adds aggregate system, may include
At least one plus aggregate device, high pressure fracture pump group C and pneumatic for aggregate tank D, it is described pneumatic to be connected to for aggregate tank D plus aggregate
Device is described pneumatic to be additionally provided with the pneumatic piping connection mouth D in underground for aggregate tank D to carry out aggregate offer3, pass through underground air feed system
System quantitative, constant speed will provide aggregate for aggregate tank aggregate to mixing system, and the high pressure fracture pump group C is connected to plus aggregate dress
It sets, described plus aggregate device is connected to the fracturing borehole F in pressure break object coal seam E, and alternate relay realizes the continuous of sand fracturing
Work.
Wherein, the present invention may include that two or more plus aggregate device may include in preferred illustrated embodiment
First plus aggregate device A and second plus aggregate device B, described first plus aggregate device A and second plus aggregate device B parallel connections are set
It sets, pneumatic be equipped with for aggregate tank D is respectively connected to the first of first plus aggregate device A and second plus aggregate device B and goes out bone
Material mouth D1Go out aggregate mouth D with second2, can aggregate offer be carried out to A, B device in aggregate loading system simultaneously, it is described pneumatic for bone
Batch can D is additionally provided with the pneumatic piping connection mouth D in underground3, by underground air feed system, will for aggregate tank aggregate quantitative, constant speed to mixed
Sand system provides aggregate, and the high pressure fracture pump group C is connected to first plus aggregate device A and second plus aggregate device B to provide
Pressure, described first plus aggregate device A and second plus aggregate device B are connected to the fracturing borehole F in pressure break object coal seam E, hand over
The continuous work of sand fracturing is realized for relay.
Shown in Figure 1, the structure of described first plus aggregate device A and second plus aggregate device B are identical, are Fig. 2 institutes
Show plus aggregate device, described plus aggregate device may include power turbine storehouse 24 and mixed aggregate room 12, the power turbine storehouse 24
May be disposed on a pedestal 20, the mixed aggregate room 12 be located on power turbine storehouse 24 and equipped with plus aggregate pipe 2 with by pressure break bone
Material mixes aggregate room 12 by adding aggregate pipe 2 to enter, and can be covered on mixed aggregate room 12 by a upper end sealing cover 4, the upper end is close
4 are covered for adding aggregate pipe 2 to place so that pressure break aggregate is mixed aggregate room 12, the mixed aggregate room 12 by adding aggregate pipe 2 to enter
Inside be provided with aggregate sieve 9, aggregate stirs big blade 10 and aggregate stirring vanelets 11, the aggregate sieve 9 is by mixed aggregate room
12 points are upper cavity and lower chamber, and setting aggregate stirs big impeller 10 and aggregate stirring small impeller 11 and connects wherein in lower chamber
First high pressure fracture liquid outlet 16, upper cavity connects the first high pressure fracture liquid entrance 7, and the sieve 9 can sieve aggregate and well
It is lower for impurities in water, aperture can need be adjusted according to screening, and the aggregate stirs big blade 10 and aggregate stirs leaflet
Piece 11 is rotatable setting up and down to carry out the uniform stirring of aggregate and fracturing fluid, the first high pressure pressure by transmission shaft 5
It splits liquid entrance 7 and high pressure fracture pump group is connected to by pressure break pipeline 8, the first high pressure fracture liquid outlet 16 passes through pressure break pipeline
15 provide the discharge of aggregate after uniform stirring, are equipped with power turbine 13 in the power turbine storehouse 24, both sides are respectively equipped with second
High pressure fracture liquid entrance 19 and the second high pressure fracture liquid outlet 22, the second high pressure fracture liquid entrance 19 passes through pressure break pipeline 18
It is connected to high pressure fracture pump group, the second high pressure fracture liquid outlet 22 provides the discharge of liquid, and institute by pressure break pipeline 23
It states line shaft 5 to stretch into power turbine storehouse 24 and be solidly connected to power turbine 13, be set between the line shaft and power turbine storehouse 24
There is sealing device, the high pressure fracture liquid is divided into two-way as a result, wherein entering power turbine storehouse 24 all the way, drives power turbine
13 rotations uniformly mix for aggregate and fracturing fluid and provide power, and carry out aggregate into mixed aggregate room 12 all the way mixes with fracturing fluid
Proportioning, fracturing fluid and mixed aggregate liquid are eventually by power house 24 and the first high pressure fracture liquid of mixed aggregate room 12 outlet and second
The outlet of high pressure fracture liquid is summarized in high-voltage tube, is carried out in high pressure injection hole plus aggregate hydraulic fracturing anti-reflection is constructed.
Wherein, described plus aggregate pipe 2 is equipped with the first high-voltage electromagnetic valve group 1, preferably can also be equipped with flow detector, with can
Time and scale are filled by remote auto control aggregate, the first high pressure fracture liquid entrance 7 is equipped with the second high-voltage electromagnetic
Valve group 3, the first high pressure fracture liquid outlet 16 are equipped with third high-voltage electromagnetic valve group 14, the second high pressure fracture liquid entrance
19 are equipped with the 4th high-voltage electromagnetic valve group 17, and the second high pressure fracture liquid outlet 22 is equipped with the 5th high-voltage electromagnetic valve group 21,
To realize the remote control of each entrance.
Wherein, the aggregate stirs big blade 10 and aggregate stirring vanelets 11 are setting up and down, and aggregate stirs big blade
10 diameter is preferably 1.5-2.5 times of aggregate stirring 11 diameter of vanelets, and the aggregate stirs big blade 10 and aggregate stirring
The distance between vanelets 11 are preferably the half that aggregate stirs 10 diameter of big blade, pass through the paddle of bilayer setting as a result,
The relevant design of distance and diameter between piece and blade can provide better mixing effect.
Preferably, the mixed aggregate room 12 is provided with circular anti-aggregate baffle 6 in the top of aggregate sieve 9,
The anti-aggregate baffle 6 is located at plus the outlet of aggregate pipe 2 lower section is to prevent aggregate during whipping process and screen filtration, bone
Material splashes the collision and abrasion for causing transmission shaft 5 and mixed aggregate chamber interior walls.
The present invention's plus aggregate device in carry out plus aggregate pressure break before, be first shut off third high-voltage electromagnetic valve group 14 and the
Five high-voltage electromagnetic valve groups 21 open the second high-voltage electromagnetic valve group 3, supply water to mixed aggregate room 12, open the first high-voltage electromagnetic valve group
1, using it is pneumatic for aggregate tank D under the effect of the original air hose power in underground, by adding aggregate pipe 2 to fill bone to mixed aggregate room 12
Material.It fills aggregate and closes the first high-voltage electromagnetic valve group 1 after the completion, open the 4th high-voltage electromagnetic valve group 17 and the 5th high-pressure solenoid valve
Group 21 supplies the mixed aggregate room 12 of high pressure fracture liquid stirring to power turbine storehouse 24 by two fracturing fluid entrances and mixes aggregate pressure
Liquid is split, third high-voltage electromagnetic valve group 14 is then opened and carries out adding aggregate hydraulic fracturing construction.
The present invention's adds aggregate device under the action of multiple high-pressure solenoid valves, upper end sealing cover and pedestal, realizes height
The uniform stirring of aggregate and fracturing fluid under pressure, air-proof condition.
Described plus aggregate device adds aggregate pressing crack construction in remote location by the control of electromagnetic valve switch " key " formula, and can
Solenoid valve block aperture is controlled using switch, timing, quantitative carry out fracturing fluid and aggregate are matched, realized quantitative, controllable, safe
Aggregate and fracturing fluid uniformly with when plus aggregate pressing crack construction.
Wherein, the invention also discloses a kind of underground coal mine hydraulic fracturing high pressure sealings continuously to add aggregate method, uses
The step of underground coal mine hydraulic fracturing high pressure sealing as described above continuously adds aggregate system, one of embodiment, is such as
Under：
Step 1：According to the aperture of fracturing borehole F, the reservoir characteristic of length and pressure break object coal seam E, fracturing fluid note is completed
Enter amount and aggregate filling Proportionality design.
Step 2：Connect first plus aggregate device A, second plus aggregate device B, high pressure fracture pump group C and pneumatic for bone
Batch can D；
Step 3：The third high-voltage electromagnetic valve group the 14, the 4th for closing first plus aggregate device A, second plus aggregate device B is high
Pressure electromagnetic valve group 17 and the 5th high-voltage electromagnetic valve group 21 open the first high-voltage electromagnetic valve group 1 and the second high-voltage electromagnetic valve group 3, profit
Aggregate is filled for first plus aggregate device A, second plus aggregate device B, wherein pneumatic for aggregate simultaneously with pneumatic for aggregate tank D
Tank is prefilled with the aggregate filled needed for design pressure break.
Step 4：After filling aggregate and fracturing fluid reach requirement in first plus aggregate device A, second plus aggregate device B, close
The first high-voltage electromagnetic valve group 1 of first plus aggregate device A, second plus aggregate device B are closed, first plus aggregate device A and the is opened
The 4th high-voltage electromagnetic valve group 17 and the 5th high-voltage electromagnetic valve group 21 of two plus aggregate device B implements stirring, is then turned on first and adds
The second solenoid valve group 3 and third high-voltage electromagnetic valve group 14 of aggregate device A proceeds by and adds aggregate hydraulic operation.
Step 5：After the fracturing fluid of first plus aggregate device A mixing aggregates has injected, second plus aggregate device B is opened
The second high-voltage electromagnetic valve group 3 and third high-voltage electromagnetic valve group 14, using second plus aggregate device B start fracturing work.Simultaneously
The the second high-voltage electromagnetic valve group 3 and third high-voltage electromagnetic valve group 14 for closing first plus aggregate device A open first plus bone after release
Expect the first high-voltage electromagnetic valve group 1 of device A, and turns on into the pneumatic valve control for aggregate tank D of first plus mixed aggregate device
System switch closes the first of first plus aggregate device A until the fracturing fluid of the first mixed aggregate device A is mixed with aggregate after filling it up with
High-voltage electromagnetic valve group 1.
Step 6：Cycle alternation is using two plus mixes aggregate device, until fracturing fluid and aggregate adding amount reach design value,
Termination of pumping and pneumatic power.
In a further embodiment, method of the invention also may include following steps：
Step 1：According to the reservoir characteristic in the aperture of fracturing borehole, length and pressure break object coal seam, fracturing fluid injection is completed
Amount and aggregate fill Proportionality design；
Step 2：Two or more plus aggregate device is parallel to pressure break pump group, is pneumatic for aggregate tank, pressure break brill
Between hole；
Step 3：Aggregate is filled to two or more plus aggregate device for aggregate tank using pneumatic, aggregate is filled
Mixed aggregate room, by respectively plus the first high pressure fracture liquid entrance of aggregate device and the second high pressure fracture liquid entrance are respectively to power leaf
It takes turns storehouse and mixed aggregate room supplies high pressure fracture liquid, be mixed and stirred for uniform aggregate and fracturing fluid；
Step 4：The first high pressure fracture liquid entrance and the outlet of the first high pressure fracture liquid of wherein one plus aggregate device are opened,
It proceeds by and adds aggregate hydraulic operation；
Step 5：After the completion of the aggregate and fracturing fluid of wherein one plus aggregate device inject, another plus aggregate device is opened
The first high pressure fracture liquid entrance and the outlet of the first high pressure fracture liquid, carried out using another plus aggregate device plus aggregate waterpower applied
Work simultaneously closes off the first high pressure fracture liquid outlet of wherein one plus aggregate device, aggregate filling and mixing is carried out to it, until its
Interior fracturing fluid is uniformly mixed with aggregate to be filled it up with；
Step 6：After the completion of another plus aggregate device aggregate and fracturing fluid injection, carry out adding bone using aggregate device is added
Expect hydraulic operation, simultaneously close off another plus aggregate device, realizes circulate operation.
It may include following steps in another preferred embodiment：
Step 1：According to the reservoir characteristic in the aperture of fracturing borehole, length and pressure break object coal seam, fracturing fluid injection is completed
Amount and aggregate fill Proportionality design；
Step 2：It connects pressure break pump group, two plus aggregate device and pneumatic for aggregate tank, according to pressure break pump group flow and adds
Aggregate designs, and setting is pneumatic for aggregate tank and each high-voltage electromagnetic valve opening；
Step 3：Close the first high pressure fracture liquid outlet the 16, second high pressure fracture liquid outlet 22 of two plus mixed aggregate device
High-voltage electromagnetic valve group, open the high-voltage electromagnetic valve group of the first high pressure fracture liquid entrance 7, and start pneumatic for aggregate tank, carry out
Two filling for adding aggregate and fracturing fluid in mixed aggregate device；
Step 4：Aggregate is completed with after fracturing fluid filling, aggregate filler pipe is closed, opens the second of two plus mixed aggregate device
The high-voltage electromagnetic valve group of high pressure fracture liquid entrance and the outlet of the second high pressure fracture liquid, implements stirring, after stirring evenly, opens wherein
The high-voltage electromagnetic valve group of one the first high pressure fracture liquid entrance for adding aggregate device and the outlet of the first high pressure fracture liquid, proceeds by
Add aggregate hydraulic operation；
Step 5：After the completion of the aggregate and fracturing fluid of this wherein one plus aggregate device inject, another plus bone are opened
The high-voltage electromagnetic valve group for expecting the first high pressure fracture liquid entrance and the outlet of the first high pressure fracture liquid of device, realizes that hydraulic operation adds bone
The switching for expecting device simultaneously closes off completion of having constructed plus aggregate device the first high pressure fracture liquid entrance and the first high pressure fracture
The high-voltage electromagnetic valve group of liquid outlet, and add mixed aggregate device to carry out closing after fracturing fluid is uniformly mixed and fills it up with aggregate this and be somebody's turn to do
Add aggregate device adds aggregate pipe；
Step 6：Circulating repetition, until fracturing fluid and aggregate adding amount reach design value.
The advantage of the invention is that：
1. the present invention plus aggregate device, devise can remote control high-voltage electromagnetic valve group, can be switched by " key "
It directly controls plus mixes the time of aggregate and fracturing fluid injection, and adjustable solenoid valve block aperture, accurately control aggregate and fracturing fluid
Proportioning, improves pressing crack construction precision and safety；
2. the present invention's adds aggregate device, pass through front end underground huge discharge in the construction process, high pressure frac pump group supplies
High pressure fracturing liquid is given, divides two-way to convey using high pressure resistant manifold, aggregate and pressure break hydraulic hybrid type power are provided all the way；Another way
It into mixed aggregate room, is mixed with aggregate, that is, ensure that fracturing fluid and the uniform hybrid power of aggregate, also ensure aggregate and pressure
Split mixing match.
3 add aggregate device to be provided with power turbine and the large and small impeller of aggregate stirring, and rotation can be synchronized under transmission shaft effect
Transhipment is dynamic, and rotary motion improves stirring capacity under turbine principle guidance, ensure that being uniformly mixed for fracturing fluid and aggregate
Property；
4. being filled in the present invention, technique is provided with 2 plus aggregate device is used alternatingly, when 1 plus aggregate device are being pressed
When splitting construction, operates another 1 by long-range pneumatic valve group plus mixed aggregate device carries out release and adds aggregate, it is ensured that pressing crack construction
Continuity, safety.
5. the underground coal mine hydraulic fracturing high pressure sealing of the present invention continuously adds aggregate device, mixed to adding using pneumatic resevoir sand tank
Aggregate unit feeding aggregate, and controlled provided with high-voltage electromagnetic valve group, realize the aggregate that device is automatic, controllable, continuous, quantitative
Filling, adition process personnel improve the safety of construction far from operations involving high pressure scene.
It is readily apparent that above description and record is only illustrated in the disclosure being not intended to be limiting of the invention
Appearance, application or use.Although describing and being described in the accompanying drawings embodiment in embodiment, the present invention does not limit
Be described as by attached drawing example and in embodiment it is now recognized that optimal mode to implement the particular case of the teachings of the present invention
Son, the scope of the present invention is by any embodiment of the description and appended claims including falling into front.
Claims (7)
1. a kind of underground coal mine hydraulic fracturing high pressure sealing continuously adds aggregate system, including at least one plus aggregate device, feature
It is that described plus aggregate device includes：
Mixed aggregate room (12) are set to above power turbine storehouse (24), interior to be divided into two cavitys up and down by aggregate sieve (9),
Setting aggregate stirs big impeller (10) and aggregate stirring small impeller (11) and connects the first high pressure fracture liquid wherein in lower chamber
Mouth (16)；Its upper cavity, which connects the first high pressure fracture liquid entrance (7) and is connected to, adds aggregate pipe (2)；
Setting power turbine (13) in power turbine storehouse (24), and it is connected with the second high pressure fracture liquid entrance (19) and the second high pressure
Fracturing fluid exports (22)；
The power turbine (13) is coaxial with the agitator arm (10,11) and provides power for it.
2. a kind of underground coal mine hydraulic fracturing high pressure sealing according to claim 1 continuously adds aggregate system, feature to exist
In including pneumatic, for aggregate tank, the pneumatic outlet connection for aggregate tank is described to add aggregate pipe (2), and underground air feed system is used in combination
Aggregate is supplied to mixed aggregate room (12).
3. a kind of underground coal mine hydraulic fracturing high pressure sealing according to claim 1 continuously adds aggregate system, feature to exist
(16), the first high pressure fracture liquid entrance (7), the second high pressure fracture liquid entrance (19), second high are exported in, the first high pressure fracture liquid
Pressure fracturing fluid exports (22) and adds is both provided with the high-pressure solenoid valve controlled for aperture on aggregate pipe (2).
4. a kind of underground coal mine hydraulic fracturing high pressure sealing according to claim 1 continuously adds aggregate system, feature to exist
In the mixed aggregate room (12) is provided with circular anti-aggregate baffle (6) in the top of aggregate sieve (9), to prevent bone
Material splashing during whipping process and screen filtration and the collision and abrasion for mixing aggregate chamber interior walls.
5. a kind of underground coal mine hydraulic fracturing high pressure sealing according to claim 1 continuously adds aggregate system, feature to exist
In described plus aggregate device is two or more, respectively plus the first high pressure fracture liquid entrance (7) of aggregate device and second high
Pressure fracturing fluid entrance (19) is connected to high pressure fracture pump group, the first high pressure fracture liquid outlet (16) and the second high pressure fracture liquid
Outlet (22) is connected to pressure break object coal seam, and described plus aggregate pipe (2) is connected to pneumatic for aggregate tank.
6. a kind of underground coal mine hydraulic fracturing high pressure sealing as described in claim 1 continuously adds the method for aggregate system, special
Sign is to include the following steps：
Step 1：According to the reservoir characteristic in the aperture of fracturing borehole, length and pressure break object coal seam, complete fracturing fluid injection rate and
Aggregate fills Proportionality design；
Step 2：Two plus aggregate device are parallel to pressure break pump group, is pneumatic between aggregate tank, fracturing borehole；
Step 3：Aggregate is filled to two plus aggregate device for aggregate tank using pneumatic, aggregate fills mixed aggregate room, by respectively adding
First high pressure fracture liquid entrance of aggregate device and the second high pressure fracture liquid entrance are supplied to power turbine storehouse and mixed aggregate room respectively
High pressure fracture liquid is given, uniform aggregate and fracturing fluid are mixed and stirred for；
Step 4：The first high pressure fracture liquid entrance and the outlet of the first high pressure fracture liquid for opening wherein one plus aggregate device, start
It carries out adding aggregate hydraulic operation；
Step 5：When wherein one plus aggregate device the injection of aggregate and fracturing fluid after the completion of, open the of another plus aggregate device
One high pressure fracture liquid entrance and the outlet of the first high pressure fracture liquid carry out adding aggregate hydraulic operation using another plus aggregate device, together
When close the first high pressure fracture liquid outlet of wherein one plus aggregate device, it is carried out aggregate filling and, until its interior fracturing fluid
It is uniformly mixed and fills it up with aggregate；
Step 6：After the completion of another plus aggregate device aggregate and fracturing fluid injection, carry out adding aggregate water using aggregate device is added
Power is constructed, and another plus aggregate device is simultaneously closed off, and realizes circulate operation.
7. a kind of underground coal mine hydraulic fracturing high pressure sealing as claimed in claim 3 continuously adds the method for aggregate system, special
Sign is to include the following steps：
Step 1：According to the reservoir characteristic in the aperture of fracturing borehole, length and pressure break object coal seam, complete fracturing fluid injection rate and
Aggregate fills Proportionality design；
Step 2：It connects pressure break pump group, two plus aggregate device and pneumatic for aggregate tank, according to pressure break pump group flow and adds aggregate
Design, setting are pneumatic for aggregate tank and each high-voltage electromagnetic valve opening；
Step 3：Close the first high pressure fracture liquid outlet (16), the second high pressure fracture liquid outlet (22) of two plus mixed aggregate device
High-voltage electromagnetic valve group, open the high-voltage electromagnetic valve group of the first high pressure fracture liquid entrance (7), and start it is pneumatic for aggregate tank, into
The filling of aggregate and fracturing fluid in row two plus mixed aggregate device；
Step 4：Aggregate is completed with after fracturing fluid filling, aggregate filler pipe is closed, opens the second high pressure of two plus mixed aggregate device
The high-voltage electromagnetic valve group of fracturing fluid entrance and the outlet of the second high pressure fracture liquid, implements stirring, after stirring evenly, opens wherein one
The high-voltage electromagnetic valve group for adding the first high pressure fracture liquid entrance and the outlet of the first high pressure fracture liquid of aggregate device, proceeds by and adds bone
Expect hydraulic operation；
Step 5：After the completion of the aggregate and fracturing fluid of this wherein one plus aggregate device inject, another plus aggregate dress are opened
The high-voltage electromagnetic valve group of the first high pressure fracture liquid entrance set and the outlet of the first high pressure fracture liquid realizes that hydraulic operation adds aggregate to fill
The switching set, simultaneously closes off completion of having constructed plus aggregate device the first high pressure fracture liquid entrance and the first high pressure fracture liquid goes out
The high-voltage electromagnetic valve group of mouth, and add mixed aggregate device to carry out closing to be somebody's turn to do after fracturing fluid is uniformly mixed and fills it up with aggregate adding bone this
That expects device adds aggregate pipe；
Step 6：Circulating repetition, until fracturing fluid and aggregate adding amount reach design value.
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| CN201810280741.8A CN108397180A (en) | 2018-04-02 | 2018-04-02 | Underground coal mine hydraulic fracturing high pressure sealing continuously adds aggregate system and method |
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| CN201810280741.8A CN108397180A (en) | 2018-04-02 | 2018-04-02 | Underground coal mine hydraulic fracturing high pressure sealing continuously adds aggregate system and method |
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| CN109372488A (en) * | 2018-09-19 | 2019-02-22 | 中煤科工集团西安研究院有限公司 | Coal mine hydraulic fracturing continuously fills proppant device and charging method with swing type |
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| CN111425248A (en) * | 2020-03-29 | 2020-07-17 | 陆斌 | Mining full-negative-pressure automatic slag and water discharging device |
| CN112253075A (en) * | 2020-10-12 | 2021-01-22 | 中煤科工集团西安研究院有限公司 | Pneumatic control multi-path parallel sand adding system for coal mine hydraulic fracturing and use method |
| CN113882843A (en) * | 2021-09-24 | 2022-01-04 | 盐城旭东机械有限公司 | Automatic hydraulic control fracturing manifold |
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Application publication date: 20180814 |