CN106523023B - Continuous rotary valve pulsed hydraulic fracturing device and method - Google Patents
Continuous rotary valve pulsed hydraulic fracturing device and method Download PDFInfo
- Publication number
- CN106523023B CN106523023B CN201611235577.6A CN201611235577A CN106523023B CN 106523023 B CN106523023 B CN 106523023B CN 201611235577 A CN201611235577 A CN 201611235577A CN 106523023 B CN106523023 B CN 106523023B
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- water
- valve
- continuous rotary
- rotary valve
- coal
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
Abstract
A kind of continuous rotary valve pulsed hydraulic fracturing device and method, device are made of water tank, water injecting pipeline, water pump, pressure relief pipe, continuous rotation ball valve and hydraulic motor etc..Continuous rotary valve pulsed hydraulic fracturing method was opened and is closed using the period of continuous rotary valve, and stable pulsation hydraulic pressure is produced in water injecting pipeline, is split for the dynamic hydraulic pressure of coal petrography and is provided new technological approaches.After accessing continuous rotary valve in water injecting pipeline, continuous rotation valve core rotates under the driving of hydraulic motor so that valve continuously and stably opens closure, forms periodical water hammer effect in the water route of injection coal and rock, produces pulsation hydraulic pressure；Continuous rotary valve is improved, when improved valve is closed, high pressure water can be actively depressured in coal and rock, increased the hydrodynamic Oscillation Amplitude of arteries and veins, improved the technique effect of hydraulic fracturing.
Description
Technical field
The present invention relates to pulsed hydraulic fracturing device and method, especially a kind of company being suitable for carrying out coal and rock pressure break
The device and method of continuous rotary valve pulsed hydraulic fracturing, belongs to coal mining technology field.
Background technology
In recent years, hydraulic fracturing technology has obtained extensive attention in coal mine.It is main former in coal and rock because that can make in this method
Raw crack expands, extends, or forms new hole, crack, and rock mass is promoted to generate displacement, realizes release, anatonosis in coal seam, from
And it can be used for the technical fields such as gas drainage under suction, stress distribution control and coal and rock water filling reduction.
Hydraulic fracturing is generally divided into common hydraulic fracturing and pulsed hydraulic fracturing.Common hydraulic fracturing mainly utilizes high pressure
Power, big flow water injecting pump fracturing fluid is pressed into target coal rock layer, need elevated pressures, and there is crack closure water conservancy diversion energy
The problems such as power declines, crack development is unordered, pressure break poor controllability.For this purpose, pulsed hydraulic fracturing becomes new probing direction.Pulsation
In hydraulic fracturing process, coal body bears the stress of mechanical periodicity, and periodic expansion-closure occurs in fissure-plane under this condition
Movement, it is easier to fatigue rupture occur, be conducive to the extension and extension of cracks in coal seam, can be realized under relatively small pressure
It is anti-reflection to a wide range of release of coal rock layer.
One of pulsed hydraulic fracturing key problem in technology is the generation that pulsation forces, and there are two types of realization devices at present：First, design
The dynamic pressure pump for directly generating dynamic pressure water, as 40/12 type pulsed coal-bed floodings of 2BZ-pump；Another is high pressure pulsating water hammer device.
It is effective that two kinds of devices, which demonstrate pulsed hydraulic fracturing,.
Since pulsed hydraulic fracturing technology still develops skill in initial stage of development except to reinforce related theoretical research
The science of parameter is outer, explores new technological approaches and the important content of technology development.
Invention content
Technical problem：The invention aims to overcome shortcoming in the prior art, a kind of simple in structure, behaviour is provided
Make continuous rotary valve pulsed hydraulic fracturing device and method convenient, that controllability is good.
Technical solution：The present invention continuous rotary valve pulsed hydraulic fracturing device, including water tank, through water injecting pipeline one and water
The water pump of case connection, the outlet of water pump are equipped with the water injecting pipeline two for leading to coal and rock, and water injecting pipeline two is equipped with continuous rotation ball
Valve, continuous rotary valve are connected with hydraulic motor through shaft coupling, what the arrival end connection of hydraulic motor was connected with water injecting pipeline two
Hydraulic motor inlet pipeline, the outlet end of hydraulic motor connect the hydraulic motor water return pipeline communicated with water tank；In the water tank
Waterfront economy water lines one feed water pump, water flows through continuous rotary valve and water injecting pipeline two and injects coal and rock after water pump is pressurized.
Continuous rotary valve includes fastening the valve body being integrated by valve seat and valve deck, is equipped with and is consolidated at valve seat and valve deck fastening
It is scheduled on screw bolt and nut together, equipped with spool and the fixing axle being connected with spool in the valve seat, is symmetrically set in fixing axle
There are rolling bearing, the top of fixing axle to stretch out valve seat, lower part is equipped with relief hole, valve inlet and outlet are provided in valve deck.
The valve water outlet diameter of continuous rotary valve is more than the diameter of valve water inlet.
Above-mentioned continuous rotary valve pulsed hydraulic fracturing device and method, includes the following steps：
A., water tank is set in the tunnel where coal and rock, water injecting pipeline one, water pump, leads to water injecting pipeline in coal and rock
Two, continuous rotary valve is installed on water injecting pipeline two, and hydraulic motor is installed on continuous rotary valve；
When b. working, the water in water tank feeds water pump, and water flows to continuous rotary valve, hydraulic motor profit after water pump is pressurized
The high pressure water that water injecting pump generates is used to drive the spool of continuous rotary valve to make continuous rotation as working media, make continuous rotary valve
Door is periodically opened and is closed, and the periodical high pressure water of outflow injects coal and rock through water injecting pipeline two, is formed in coal and rock
Periodical water hammer effect realizes dynamic pressure hydraulic fracturing to generate pulsating water pressure in coal and rock；
C. when continuous rotary valve rotates to closed state, drain hole goes to water outlet or water inlet side, drain hole position
When valve water inlet end side, the aperture of drain hole is closed by valve body, when drain hole is located at water outlet side, is led with water injecting pipeline two
Logical, high-pressure hydraulic is flowed out by drain hole in water injecting pipeline two, returns to water feeding tank, and hydraulic pressure declines in coal and rock, to increase rotation
The amplification of coal and rock hydraulic pressure, makes the amplitude of pressure increase when rotary valve is opened.
Advantageous effect：The present invention according to the unexpected open and close of valve in hydraulic pipeline can make in pipeline fluid flow rate with
Momentum changes, and causes the sharp increase of pressure or reduces sharply, and to induce the principle of water hammer, provides a kind of realization pulsed hydraulic fracturing
Technical method, be to the abundant of pulsed hydraulic fracturing technology and development.Through experiment with it was verified that pulsed hydraulic fracturing can be
More preferable technique effect is obtained under the conditions of smaller pump pressure.It is pulsating water pressure by hydrostatic variable pressure, new pulsation waterpower is provided
Fracturing technique scheme.Initially set up the hydrostatic frac system of coal and rock, mainly include hydrostatic pumps and lead to coal and rock drilling in
Pipe-line system.On this basis, increase a continuous rotation valve in the pipe-line system of water pump output, continuous rotation valve
Spool energy continuous rotation makes water injecting pipeline generating period open and be closed.The unlatching of valve causes water hammer to be imitated with nature is closed
It answers, dynamic pressure is generated, to increase the fracturing effect of coal and rock.To increase the dynamic pressure effect that continuous rotation valve generates, to spool
It is improved.A relief hole is done in spool, when valve is closed, trepanning can be with one lateral line unicom of coal and rock, can
So that part water is backflowed recovery tank, causes the decline of hydraulic pressure in coal and rock drilling.When Spool rotating to open state, water pump pair
The ftercompction of pipeline makes hydraulic pressure in coal and rock increase, to generate stable fluctuation pressure in the continuous rotation of spool.Coal and rock
Pulsed hydraulic fracturing be control of coalmine gas and mine pressure control technology new tool, key is the hydrodynamic generation of arteries and veins.
The pulsed hydraulic fracturing equipment for exploring and developing high efficient and reliable is the core content of technology development.The fracturing system knot
Structure is simple, and it is convenient to realize, operability is strong, can provide pressure peak higher pulsation water using the method, solve water filling
The problem of equipment such as pump are difficult to bear more high dynamic pressure, can be preferably applied to hydraulic fracturing or coal seam water infusion engineering.
Description of the drawings
Fig. 1 is the continuous rotary valve pulsed hydraulic fracturing apparatus structure schematic diagram of the present invention；
Fig. 2 is the continuous rotation valve mechanism schematic diagram of the present invention.
In figure：1- water tanks, 2- water injecting pipelines one, 3- water pumps, 4- water injecting pipelines two, 5- pressure relief pipes, 6- continuous rotary valves,
7 coal and rocks, 8- hydraulic motor water return pipelines, 9- hydraulic pressure horse inlet pipelines, 10- hydraulic motors, 11- shaft couplings, 12- fixing axles,
13- fillers, 14- spools, 15- valve bodies, 16- valve water inlets, 17- bolts, 18- nuts, 19- rolling bearings, 20- relief holes,
21- sealing rings, 22- valve water outlets.
Specific implementation mode
The present invention is further illustrated for embodiment in below in conjunction with the accompanying drawings：
Such as showing for Fig. 1, continuous rotary valve pulsed hydraulic fracturing device of the invention, mainly by water tank 1, water injecting pipeline, water
The compositions such as pump 3, pressure relief pipe 5,6 hydraulic motor 8 of continuous rotation ball valve.Water tank 1 connects water pump 3, water pump 3 through water injecting pipeline 1
Outlet be equipped with and lead to the water injecting pipeline 24 of coal and rock, water injecting pipeline 24 is equipped with continuous rotary valve 6, and continuous rotary valve 6 passes through
Shaft coupling 11 is connected with hydraulic motor 10, the hydraulic motor that the arrival end connection of hydraulic motor 10 is connected with water injecting pipeline two into
Water lines 9, the outlet end of hydraulic motor 10 connect the hydraulic motor water return pipeline 8 communicated with water tank 1；Water in the water tank 1
Water pump 3 is fed through water injecting pipeline 1, water flows through continuous rotary valve 6 and water injecting pipeline 24 injects coal and rock after the supercharging of water pump 3
7。
As shown in Fig. 2, the continuous rotary valve 6 includes fastening the valve body 15 being integrated by valve seat and valve deck, valve seat and
The bolt 17 that is secured together and nut 18 are equipped at valve deck fastening, be equipped in the valve seat spool 14 and with spool 14
Connected fixing axle 12 is arranged with rolling bearing 19 in fixing axle 12, and valve seat is stretched out on the top of fixing axle 12, and lower part is equipped with and lets out
It presses hole 20, when 20 aperture turns water inlet of pressure relief vent, closed by valve body 15, when turning to water outlet, then connects with water injecting pipeline 24
It is logical, it is provided with valve water inlet 16 in the valve deck, the valve water outlet 22 communicated with valve water inlet 16 is provided in the valve seat.Described
22 diameter of valve water outlet of continuous rotary valve 6 is more than the diameter of valve water inlet 16.
The continuous rotary valve pulsed hydraulic fracturing method of the present invention, is as follows：
A. in the tunnel where coal and rock 7 setting water tank 1, water injecting pipeline 1, water pump 3, lead to note in coal and rock 7
Water lines 24 install continuous rotary valve 6 on water injecting pipeline 24, and install hydraulic motor 10 on continuous rotary valve 6；
B. water tank 1 supplies water by 2 feed pump 3 of pipeline, and water flows to continuous rotary valve 6, hydraulic motor after the supercharging of water pump 3
As working media, the spool 14 of driving continuous rotary valve 6 makes continuously 10 high pressure waters generated using water injecting pump 3 as continuous rotation
Changeover valve 6 is periodically opened and is closed, and periodical water hammer effect is generated in pipeline 4, to generate arteries and veins in coal and rock 7
Flowing pressure realizes dynamic pressure hydraulic fracturing；
C. when continuous rotary valve 6 rotates to closed state, drain hole 20 goes to 16 side of water outlet 22 or water inlet, lets out
When water hole 20 is located at valve 16 side of water inlet end, the aperture of drain hole 20 is closed by valve body 15, and drain hole 20 is located at water outlet 22 1
When side, drain hole 20 is connected with water injecting pipeline 24, and high-pressure hydraulic is flowed out by drain hole in water injecting pipeline two, returns to water feeding tank,
Hydraulic pressure declines in coal and rock, to increase the amplification of coal and rock hydraulic pressure when rotary valve is opened, the amplitude of pressure is made to increase.
Claims (2)
1. a kind of continuous rotary valve pulsed hydraulic fracturing device, including water tank（1）, water injecting pipeline one（2）, water pump（3）, water injection pipe
Road two（4）And continuous rotary valve（6）, it is characterised in that：The water injecting pipeline one（2）The water pump being connect with water tank（3）, water pump
（3）Outlet be equipped with and lead to the water injecting pipeline two of coal and rock（4）, water injecting pipeline two（4）It is equipped with continuous rotary valve（6）, continuously
Rotary valve（6）Through shaft coupling（11）It is connected with hydraulic motor（10）, hydraulic motor（10）Arrival end connection with water injecting pipeline two
（4）The hydraulic motor inlet pipeline being connected（9）, hydraulic motor（10）Outlet end connection and water tank（1）The hydraulic pressure horse communicated
Up to water return pipeline（8）；The water tank（1）Interior waterfront economy water lines one（2）Feed water pump（3）, water is by water pump（3）Supercharging
Afterwards, continuous rotary valve is flowed through（6）With water injecting pipeline two（4）Inject coal and rock（7）；The continuous rotary valve（6）Including by valve
Seat and valve deck fasten the valve body being integrated（15）, the bolt being secured together is equipped at valve seat and valve deck fastening（17）And spiral shell
It is female（18）, the valve seat is interior to be equipped with spool（14）With with spool（14）Connected fixing axle（12）, fixing axle（12）It is upper symmetrical
Equipped with rolling bearing（19）, fixing axle（12）Top stretch out valve seat, the lower part of spool is equipped with relief hole（20）, in the valve deck
It is provided with valve water inlet（16）, valve water outlet is provided in the valve seat（22）；
The continuous rotary valve（6）Valve water outlet（22）Diameter is more than valve water inlet（16）Diameter, relief hole（20）Hole
When mouth switching valve water inlet, by valve body（15）Closing, when switching valve water outlet, then with water injecting pipeline two（4）Connection.
2. the application method of continuous rotary valve pulsed hydraulic fracturing device according to claim 1, which is characterized in that including such as
Lower step：
A. in coal and rock（7）Water tank is set in the tunnel at place（1）, water injecting pipeline one（2）, water pump（3）, lead to coal and rock（7）
Interior water injecting pipeline two（4）, in water injecting pipeline two（4）Upper installation continuous rotary valve（6）, and in continuous rotary valve（6）Upper installation
Hydraulic motor（10）；
When b. working, water tank（1）Interior water feeds water pump（3）, water is by water pump（3）Continuous rotary valve is flowed to after supercharging（6）, liquid
Pressure motor（10）Utilize water pump（3）The high pressure water of generation drives continuous rotary valve as working media（6）Spool（14）Work connects
Continuous rotation, makes continuous rotary valve periodically open and be closed, the periodical high pressure water of outflow is through water injecting pipeline two（4）Inject coal
Rock mass（7）, in coal and rock（7）The periodical water hammer effect of interior formation, in coal and rock（7）Middle generation pulsating water pressure is realized
Dynamic pressure hydraulic fracturing；
C. work as continuous rotary valve（6）When rotating to closed state, relief hole（20）Go to valve water inlet（16）Or valve water outlet
（22）Side, relief hole（20）Positioned at valve water inlet（16）When side, relief hole（20）Aperture by valve body（15）Closing, pressure release
Hole（20）Positioned at valve water outlet（22）When side, with water injecting pipeline two（4）Conducting, water injecting pipeline two（4）Interior high-pressure hydraulic passes through
Relief hole（20）Outflow returns to water feeding tank（1）, coal and rock（7）Interior hydraulic pressure declines, to increase continuous rotary valve（6）It opens
When coal and rock（7）The amplification of hydraulic pressure makes the amplitude of pressure increase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611235577.6A CN106523023B (en) | 2016-12-28 | 2016-12-28 | Continuous rotary valve pulsed hydraulic fracturing device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611235577.6A CN106523023B (en) | 2016-12-28 | 2016-12-28 | Continuous rotary valve pulsed hydraulic fracturing device and method |
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| Publication Number | Publication Date |
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| CN106523023A CN106523023A (en) | 2017-03-22 |
| CN106523023B true CN106523023B (en) | 2018-07-27 |
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| CN201611235577.6A Expired - Fee Related CN106523023B (en) | 2016-12-28 | 2016-12-28 | Continuous rotary valve pulsed hydraulic fracturing device and method |
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| CN112392423A (en) * | 2020-12-23 | 2021-02-23 | 大庆油田有限责任公司 | Pulse well washing device for water injection well |
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| CN2249337Y (en) * | 1996-01-11 | 1997-03-12 | 石善涛 | Self-balanced floation ball valve |
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| CN105298462A (en) * | 2015-11-06 | 2016-02-03 | 中国矿业大学 | High-power electric knocking assisted hydrofracture coal seam permeability increase method for end-located drainage roadway |
| CN105909228A (en) * | 2016-06-29 | 2016-08-31 | 中国矿业大学(北京) | Pulse high-pressure hydraulic slotting and fracturing device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2388908C1 (en) * | 2009-04-03 | 2010-05-10 | Общество С Ограниченной Ответственностью "Соновита" | Method of electric hydraulic impact on oil formation and device for its implementation |
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- 2016-12-28 CN CN201611235577.6A patent/CN106523023B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2249337Y (en) * | 1996-01-11 | 1997-03-12 | 石善涛 | Self-balanced floation ball valve |
| CN202023547U (en) * | 2011-04-29 | 2011-11-02 | 中国矿业大学 | Coal mine underground pulsed hydraulic fracturing equipment |
| CN202064924U (en) * | 2011-04-29 | 2011-12-07 | 中国矿业大学 | Hydraulic fracturing equipment in coal mine |
| CN204082201U (en) * | 2014-07-15 | 2015-01-07 | 中国矿业大学 | Coal-seam high-pressure pulsating water hammer water-infusion device |
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