CN110005356A - A kind of strong hydraulic pulse generator of low frequency equal-pressure-difference and its pulsation method for generation - Google Patents
A kind of strong hydraulic pulse generator of low frequency equal-pressure-difference and its pulsation method for generation Download PDFInfo
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- CN110005356A CN110005356A CN201910292265.6A CN201910292265A CN110005356A CN 110005356 A CN110005356 A CN 110005356A CN 201910292265 A CN201910292265 A CN 201910292265A CN 110005356 A CN110005356 A CN 110005356A
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- 230000010349 pulsation Effects 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002131 composite material Substances 0.000 claims abstract description 78
- 230000000903 blocking effect Effects 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 15
- 230000033001 locomotion Effects 0.000 claims description 13
- 239000003245 coal Substances 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 238000013519 translation Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000004620 low density foam Substances 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims 1
- 230000035699 permeability Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B28/00—Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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Abstract
The invention discloses a kind of strong hydraulic pulse generators of low frequency equal-pressure-difference, including cylinder body and press assembly；Opening and jet orifice are offered on cylinder body, opening is connected with jet orifice；Press assembly includes pressure-bearing piston and pressure-bearing spring, and through-hole is offered in pressure-bearing piston, and through-hole face is open, and is provided with pressure-bearing composite diaphragm in through-hole；Trigger device is connected on pressure-bearing composite diaphragm, trigger device includes switch block and triggering screw rod, and triggering screw rod is fixed in cylinder body, and switch block is set in pressure-bearing piston；Switch block includes the first lock tongue and the second lock tongue, and the second lock tongue is connected with runner striking gear, and runner striking gear is connect with triggering screw flight.In addition, the present invention also provides a kind of pulsation method for generation of the strong hydraulic pulse generator of low frequency equal-pressure-difference.The strong hydraulic pulse generator of low frequency equal-pressure-difference of the invention can be such that pulsation hydraulic load greatly improves, and can not only effectively improve reservoir fracture density and permeability, and can anti-locking apparatus blocking.
Description
Technical field
The invention belongs to coal gas layer development technique fields, and in particular to a kind of strong hydraulic pulse generator of low frequency equal-pressure-difference and
Its method for generation of pulsing.
Background technique
Methane is current coal-bed gas exploitation by hydraulic fracturing-drainage and step-down mainly with ADSORPTION STATE preservation in coal seam reservoirs
Major way.Gas is desorbed by decompression mode as free gas, and is expanded by natural hole crack, the artificial crack of hydraulic fracturing
Dissipate-seepage flow to pit shaft.Cbm development technology and the mismatch of geological conditions are the critical bottlenecks for restricting coal bed gas Efficient Development,
Traditional quiet hydraulic fracturing technology mainly makes coal seam generate more single roomy crack, is not fully conducive to the ditch of micropore
The flowing of logical and gas.Dynamic impact loads can effectively generate microcrack in coal seam, to improve the microfissure field of coal seam reservoirs
Density effectively improves coal seam permeability.
Pulsed hydraulic fracturing is to realize a kind of mode of reservoir shock loading, but finding device is primary at present such as water hammer
Confluent is small, and load is limited, and be easy to cause impurity accumulation, device blocking the problems such as.Confluent is small to cause load to be conducted
Limited, stress cannot effectively play a role at reservoir fracture tip；Impurity accumulation directly influences equipment operation, maintenance and management
Cost.
Summary of the invention
Technical problem to be solved by the present invention lies in view of the above shortcomings of the prior art, provide a kind of low frequency equal-pressure-difference
Strong hydraulic pulse generator and its pulsation method for generation.The strong hydraulic pulse generator of the low frequency equal-pressure-difference can make hydraulic load of pulsing
It greatly improves, anti-locking apparatus blocking effectively improves reservoir fracture density and permeability, realizes that a confluent is big, anti-impurity is long-pending
The purpose of forming sediment, reservoir low frequency cyclic loading impacted.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of strong hydraulic pulse hair of low frequency equal-pressure-difference
Raw device, which is characterized in that including cylinder body, be provided with press assembly in the cylinder body；
The opening for connected pipes is offered on the cylinder body, on the cylinder body and on the side wall of one end far from opening
Jet orifice is offered, the opening is connected with jet orifice；
The press assembly includes pressure-bearing piston and the pressure-bearing spring for being set to pressure-bearing piston lower part, in the pressure-bearing piston
Offer through-hole, the through-hole face opening and and opening in communication, be provided with for blocking or opening through-hole in the through-hole
Pressure-bearing composite diaphragm；The trigger device for triggering the movement of pressure-bearing composite diaphragm, institute are connected on the pressure-bearing composite diaphragm
Stating trigger device includes switch block and triggering screw rod, and the switch block includes working in coordination and being located under pressure-bearing composite diaphragm
First lock tongue and the second lock tongue in portion, second lock tongue and one end far from the first lock tongue are connected with for driving the second lock tongue
The runner striking gear of translation, the one end for triggering screw rod are provided with outer spiral shell for being threadedly coupled with the runner striking gear
Line, the other end for triggering screw rod are fixed in cylinder body.
The above-mentioned strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference, which is characterized in that the runner striking gear includes
Inner rotary table and it is set in the ratchet being arranged concentrically on the outside of inner rotary table and with inner rotary table, is fixed on the ratchet for stirring second
The stir head of lock tongue translation；The pawl for rotating with inner rotary table is hinged on the inner rotary table, be provided on the ratchet with
The asymmetric internal tooth of pawl free end engagement.
The above-mentioned strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference, which is characterized in that be arranged on the inner rotary table useful
In the internal screw thread being connect with triggering screw flight.
The above-mentioned strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference, which is characterized in that also set up in the pressure-bearing piston
The balance for having connecting screw and being sheathed on connecting screw；Connection bullet is arranged on the connecting screw and close to one end of balance
The bar portion of connecting screw is fixed in spring, one end of the connecting spring, and the other end of the connecting spring is fixed on pressure-bearing piston
On；The yaw for being clamped with the second lock tongue is provided on the balance.
The above-mentioned strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference, which is characterized in that second lock tongue includes being used for
With the first pushing plate of yaw clamping, first pushing plate is set on the face of close yaw of the second lock tongue；It is described to stir
Head stirs the second lock tongue by the second pushing plate being set on the second lock tongue, and second pushing plate is set to the second lock tongue
On the face of stir head, the face of the close yaw of second lock tongue is vertical with close to the face of stir head；First lock tongue
On be arranged with the first latch bolt spring, one end of first latch bolt spring is fixed on the first lock tongue, first latch bolt spring
The other end be fixed in pressure-bearing piston；The second latch bolt spring is arranged on second lock tongue, second latch bolt spring
One end is fixed on the second lock tongue, and the other end of second latch bolt spring is fixed in pressure-bearing piston.
The above-mentioned strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference, which is characterized in that be provided with and be used on the balance
The internal screw thread being threadedly coupled with connecting screw.
A kind of above-mentioned strong hydraulic pulse generator of low frequency equal-pressure-difference, which is characterized in that the pressure-bearing composite diaphragm following table
The first idler wheel for be slidably connected pressure-bearing composite diaphragm and the first lock tongue is provided between face and the first lock tongue, the pressure-bearing is multiple
Close the second idler wheel being provided between partition lower surface and the second lock tongue for be slidably connected pressure-bearing composite diaphragm and the second lock tongue；
The pressure-bearing composite diaphragm is provided with for pressure-bearing composite diaphragm to be connect with pressure-bearing piston on one end of the first lock tongue
Bearing rod is provided with returning spring on the bearing rod, and one end of the returning spring is fixed on pressure-bearing composite diaphragm, described
The other end of returning spring is fixed in pressure-bearing piston.
The above-mentioned strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference, which is characterized in that the pressure-bearing composite diaphragm is steel
The density of the composite construction of plate and light material, the pressure-bearing composite diaphragm is less than 1g/cm3, the light material includes low close
Spend foam.
The above-mentioned strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference, which is characterized in that offered in the pressure-bearing piston
For accommodating the screw rod storehouse of triggering screw rod.
In addition, the present invention also provides a kind of pulsation method for generation of above-mentioned strong hydraulic pulse generator of low frequency equal-pressure-difference,
It is characterized in that, method includes the following steps:
When the pressure of the fluid by opening injection is greater than bottom pressure, pressure-bearing composite diaphragm drives pressure-bearing piston to transport downwards
Dynamic, pressure-bearing piston drives runner striking gear to move downward, and runner striking gear is moved downward and rotated relative to triggering screw rod, turns
Wheel striking gear rotation drives the second lock tongue to pressure-bearing piston internal motion to fully entering inside pressure-bearing piston, pressure-bearing it is compound every
Plate compresses the first lock tongue to pressure-bearing piston internal motion, and pressure-bearing composite diaphragm is opened, and the fluid of injection by opening, through-hole and is penetrated
Head piece impacts coal storage layer, forms primary pulsation hydraulic blow pressure break；
After the completion of pressure break, pressure-bearing spring-return power drives pressure-bearing piston to move upwards, and pressure-bearing piston moves upwards band
Dynamic pressure-bearing composite diaphragm and runner striking gear move upwards, and runner striking gear is mobile relative to triggering screw rod and rotates, until
Runner striking gear is detached from triggering screw rod, and the first lock tongue stretches out into through-hole, and the second lock tongue is stretched out into through-hole, the first lock tongue and
Second lock tongue supports pressure-bearing composite diaphragm, pressure-bearing composite diaphragm closure.
Compared with the prior art, the present invention has the following advantages:
1, the strong hydraulic pulse generator of low frequency equal-pressure-difference of the invention pushes pressure-bearing piston and pressure-bearing multiple by pressure-bearing spring
Partition movement, pressure-bearing piston movement band driven triggering device are closed, trigger device triggers pressure-bearing composite diaphragm, realizes that low frequency back and forth shakes
Dynamic, output fracturing fluid generates low frequency hydraulic pulse, can either effectively improve reservoir fracture density and permeability, and can prevent from filling
Set blocking.
2, the strong hydraulic pulse generator architecture of low frequency equal-pressure-difference of the invention is simple, can bear certain load by setting
Pressure-bearing spring is born, and is cooperated with pressure-bearing piston, pressure-bearing composite diaphragm and trigger device, and pulsation waterpower intensity can be greatly improved,
The recyclable coal seam reservoirs pulsed hydraulic fracturing operation of low frequency is realized, meanwhile, it is capable to guarantee the action intensity of each pressure operation
It is identical, increase single displacement, enhances single reservoir action intensity.
3, the strong hydraulic pulse generator of low frequency equal-pressure-difference of the invention is to trigger screw rod and runner striking gear as triggering
Switch block is cooperated by inner rotary table, ratchet and pawl, guarantees to drive ratchet synchronous rotary when inner rotary table rotates clockwise,
When inner rotary table rotates counterclockwise, ratchet remains static；It is pushed away by connecting screw, connecting spring, balance, yaw and first
The cooperation of movable plate guarantees that pressure-bearing composite diaphragm second lock tongue during opening does not stretch out, and pressure-bearing composite diaphragm is moving to
The second lock tongue stretches out when blocking through-hole, guarantees going on smoothly for pressure break circulation.
With reference to the accompanying drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the strong hydraulic pulse generator of low frequency equal-pressure-difference of the invention；
Fig. 2 is switch block of the present invention and pressure-bearing composite diaphragm connection relationship diagram；
Fig. 3 is the structural schematic diagram of runner striking gear of the present invention；
Fig. 4 is the structural schematic diagram of balance of the present invention and yaw.
Description of symbols
1-cylinder body；1-1-opening；1-2-triggering screw rod；
2-pressure-bearing springs；3-through-holes；4-jet orifices；
5-pressure-bearing pistons；5-1-screw rod storehouse；6-pressure-bearing composite diaphragms；
7-the first lock tongue；The first idler wheel of 7-1-；The first spring stop piece of 7-2-；
8-the second lock tongue；The second idler wheel of 8-1-；8-2-second spring baffle；
The first pushing plate of 8-3-；The second pushing plate of 8-4-；9-lock tongue cavities；
10-the second latch bolt spring；11-ratchets；11-1-stir head；
11-2-inner rotary table；11-3-pawl；12-connecting screws；
13-connecting springs；13-1-connecting spring baffle；14-balances；
14-1-yaw；15-returning springs；16-the first latch bolt spring；
17-spring storehouses；18-guide posts；19-directed cavities.
Specific embodiment
As shown in Figure 1, the strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference of the invention, including cylinder body 1, the cylinder body 1
Inside it is provided with press assembly；
Offer the opening 1-1 for connected pipes on the cylinder body 1, on the cylinder body 1 and one end far from opening 1-1
Side wall on offer jet orifice 4, the opening 1-1 is connected with jet orifice 4；
The press assembly includes pressure-bearing piston 5 and the pressure-bearing spring 2 for being set to 5 lower part of pressure-bearing piston, and the pressure-bearing is living
Through-hole 3 is offered on plug 5, and 3 face of through-hole is open 1-1 and to be connected with opening 1-1, is provided with and is used in the through-hole 3
Block or open the pressure-bearing composite diaphragm 6 of through-hole 3；It is connected on the pressure-bearing composite diaphragm 6 for triggering pressure-bearing composite diaphragm 6
The trigger device of movement, the trigger device include switch block and triggering screw rod 1-2, and the switch block includes working in coordination
And it is located at the first lock tongue 7 and the second lock tongue 8 of 6 lower part of pressure-bearing composite diaphragm, second lock tongue 8 and far from the first lock tongue 7
One end be connected with for drive the second lock tongue 8 translate runner striking gear, triggering screw rod 1-2 one end be provided with for institute
The external screw thread of runner striking gear threaded connection is stated, the other end of triggering screw rod 1-2 is fixed in cylinder body 1.Pressure-bearing piston 5 is nested
In cylinder body 1, pressure-bearing piston 5 slides up and down in cylinder body 1；When blocking through-hole 3, pressure-bearing composite diaphragm 6 is in close state, and is held
Press the parallel face of composite diaphragm 6 opening 1-1 and perpendicular to 3 inner wall of through-hole；When opening through-hole 3, pressure-bearing composite diaphragm 6 is in and beats
Open state, inner wall of the one end of pressure-bearing composite diaphragm 6 far from trigger device close to the separate trigger device side of through-hole 3；By
The fluid that 1-1 injects that is open applies pressure, when pressure-bearing piston 5, which is under pressure, to be moved downward, pressure-bearing spring 2 to pressure-bearing piston 5
It is compressed by the downward power that pressure-bearing piston 5 applies, the load and the selection of predetermined decrement that can be born according to pressure-bearing spring 2 are held
Pressing spring 2；Pressure-bearing spring 2 is set to for accommodating pressure-bearing spring 2 and can be used in the spring storehouse 17 that pressure-bearing piston slides up and down,
To be open 1-1, through-hole 3, the channel lumens composed by 17 outer wall of spring storehouse and jet orifice 4 of pressure-bearing composite diaphragm 6 are divided into up and down two
Part, lower part are communicated with shaft bottom, and pressure is identical as bottom pressure, upper part connected pipes, the pressure of pressure and fluid injection
It is identical；When fluid infusion pressure is greater than bottom pressure, the pressure-bearing composite diaphragm 6 of closed state drives pressure-bearing piston 5 to moving down
Dynamic, pressure-bearing piston 5 compresses pressure-bearing spring 2, and when pressure-bearing spring 2 reaches predetermined decrement, switch block is activated and answers pressure-bearing
It closes partition 6 to open, through-hole 3 is opened, and the fluid of injection generates water hammer by through-hole 3, jet orifice 4, and impact of water hammer acts on coal storage
Layer forms primary pulsation hydraulic blow pressure break.Be provided with guide post 18 in cylinder body 1, guide post 18 be parallel to 1 side wall surface of cylinder body and
Through spring storehouse 17, directed cavity 19 matched with guide post 18 is offered in pressure-bearing piston 5, guide post 18 is through spring storehouse 17
One end penetrates directed cavity 19, and when pressure-bearing piston 5 is moved to pressure-bearing spring 2, directed cavity 19 is moved to the direction close to guide post 18.
Guide post 18 and directed cavity 19 can guarantee not departing from 1 inner wall of cylinder body when pressure-bearing piston opposing cylinder 1 moves up and down.
In the present embodiment, as shown in figure 3, the runner striking gear includes inner rotary table 11-2 and is set in inner rotary table 11-2
Outside and the ratchet 11 being arranged concentrically with inner rotary table 11-2 are fixed on the ratchet 11 for stirring the translation of the second lock tongue 8
Stir head 11-1；The pawl 11-3 for rotating with inner rotary table 11-2 is hinged on the inner rotary table 11-2, on the ratchet 11
It is provided with the asymmetric internal tooth engaged with the free end pawl 11-3.When inner rotary table 11-2 is rotated clockwise, ratchet 11 is in pawl
It is rotated simultaneously under the drive of 11-3；When inner rotary table 11-2 rotates counterclockwise, then pawl 11-3 does not drive ratchet 11 to rotate；It completes
After pressure break, channel lumens are connected to shaft bottom, and channel cavity fluid pressure is stablized, and pressure-bearing spring 2 pushes away under the action of restoring force
Dynamic pressure-bearing piston 5 moves upwards, and pressure-bearing piston 5 drives pressure-bearing composite diaphragm 6 to move to the position for blocking through-hole 3, inner rotary table 11-
2 moves and both opposite triggering screw rod 1-2 is rotated counterclockwise to is detached to the direction far from triggering screw rod 1-2, and pawl 11-3 strokes
The internal tooth 11-2 for crossing ratchet 11 does not drive ratchet 11 to rotate, and the one end of pressure-bearing composite diaphragm 6 far from the first lock tongue 7 is close to the
One end of one lock tongue 7 is axis rotation, and the first lock tongue 7 is stretched out to through-hole 3, and the second lock tongue 8 will not be under the blocking of yaw 14-1
Through-hole 3 stretches out.
In the present embodiment, the internal screw thread for being threadedly coupled with triggering screw rod 1-2 is provided on the inner rotary table 11-2.
As shown in Figure 1, Figure 2 and Figure 4, in the present embodiment, it is additionally provided with connecting screw 12 in the pressure-bearing piston 5 and is arranged
In the balance 14 on connecting screw 12；Connecting spring 13, institute are arranged on the connecting screw 12 and close to one end of balance 14
The bar portion of connecting screw 12 is fixed in the one end for stating connecting spring 13, and the other end of the connecting spring 13 is fixed on pressure-bearing piston
On 5；The yaw 14-1 for being clamped with the second lock tongue 8 is provided on the balance 14.The connecting screw 12 and separate balance
The pressure-bearing composite diaphragm 6 of 14 one end face closed state is also set on the connecting screw 12 and with 13 junction of connecting spring
It is equipped with connecting spring baffle 13-1.
In the present embodiment, as shown in Figures 2 and 3, second lock tongue 8 includes for pushing away with yaw 14-1 is clamped first
Movable plate 8-3, the first pushing plate 8-3 are set on the face of close yaw 14-1 of the second lock tongue 8；The stir head 11-1 is logical
It crosses the second pushing plate 8-4 being set on the second lock tongue 8 and stirs the second lock tongue 8, the second pushing plate 8-4 is set to the second lock
On the face of the close stir head 11-1 of tongue 8, the face of the close yaw 14-1 of second lock tongue 8 and the face close to stir head 11-1
Vertically；The first latch bolt spring 16 is arranged on first lock tongue 7, the first lock is fixed in one end of first latch bolt spring 16
On tongue 7, the other end of first latch bolt spring 16 is fixed in pressure-bearing piston 5；The second lock is arranged on second lock tongue 8
Tongue spring 10, one end of second latch bolt spring 10 are fixed on the second lock tongue 8, the other end of second latch bolt spring 10
It is fixed in pressure-bearing piston 5.It is fixed with lock tongue cavity 9 in the pressure-bearing piston 5, spring stop piece, the first lock are provided in lock tongue cavity 9
Tongue 7 is pierced by lock tongue cavity 9 and stretches out to through-hole 3, and the second lock tongue 8 is pierced by lock tongue cavity 9 and stretches out to through-hole 3, and the spring stop piece includes solid
The first spring stop piece 7-2 being scheduled on the first lock tongue 7 and second spring baffle 8-2 being fixed on the second lock tongue 8.When pressure-bearing is multiple
Partition 6 is closed to open, pressure-bearing composite diaphragm 6 is separated with connecting screw 12, and connecting screw 12 pops up under the action of connecting spring 13,
Connecting screw 12 drives balance 14 to rotate, and yaw 14-1 blocks the first pushing plate 8-3, prevents the second lock tongue 8 from returning to oil pipe chamber 3
Bullet, as in Fig. 4 position 1. shown in.When pressure-bearing composite diaphragm 6 returns to the position for blocking through-hole 3,12 quilt of connecting screw that leans out
Pressure-bearing piston 5 is squeezed into, the yaw 14-1 of balance 14 is driven to rotate counterclockwise far from the second lock tongue 8, is not clamped and stops the second lock tongue
8, as in Fig. 4 position 2. shown in；Second lock tongue 8 is stretched out to 3 direction of through-hole, is supported pressure-bearing composite diaphragm 6 with the first lock tongue 7, is held
Carry injection pressure next time.
In the present embodiment, the internal screw thread for being threadedly coupled with connecting screw 12 is provided on the balance 14.
In the present embodiment, it is used for as shown in Fig. 2, being provided between 6 lower surface of pressure-bearing composite diaphragm and the first lock tongue 7
First idler wheel 7-1 of the pressure-bearing that is slidably connected composite diaphragm 6 and the first lock tongue 7,6 lower surface of pressure-bearing composite diaphragm and the second lock
The second idler wheel 8-1 for be slidably connected pressure-bearing composite diaphragm 6 and the second lock tongue 8 is provided between tongue 8；The pressure-bearing it is compound every
Plate 6 is provided with the bearing rod for pressure-bearing composite diaphragm 6 to be connect with pressure-bearing piston 5 on one end of the first lock tongue 7, described
Returning spring 15 is provided on bearing rod, one end of the returning spring 15 is fixed on pressure-bearing composite diaphragm 6, the reply bullet
The other end of spring 15 is fixed in pressure-bearing piston 5.When pressure-bearing composite diaphragm 6 is opened, pressure-bearing composite diaphragm 6 passes through bearing rod still
It is connect with pressure-bearing piston 5.When oil pipe is identical with downhole fluid pressure, the one end of pressure-bearing composite diaphragm 6 far from bearing rod is floating
The lower movement of the restoring force of power and returning spring 15 effect, pressure-bearing piston 5 move under the effect of pressure-bearing spring 2, pressure-bearing composite diaphragm 6
It closes, next fluid is waited to inject by oil pipe.
In the present embodiment, the pressure-bearing composite diaphragm 6 is the composite construction of steel plate and light material, and total body density is less than
1g/cm3, the light material includes low density foam.
In the present embodiment, as shown in Figure 1, offering the screw rod storehouse for accommodating triggering screw rod 1-2 in the pressure-bearing piston 5
5-1。
The pulsation method for generation of the strong hydraulic pulse generator of low frequency equal-pressure-difference of the invention the following steps are included:
When the pressure of the fluid by opening 1-1 injection is greater than bottom pressure, pressure-bearing composite diaphragm 6 drives pressure-bearing piston 5
It moving downward, pressure-bearing piston 5 drives inner rotary table 11-2 to be moved downwardly to set along screw rod storehouse 5-1 and is set on triggering screw rod 1-2, and interior turn
The opposite triggering screw rod 1-2 of disk 11-2 is downward and rotates clockwise, and the pawl 11-3 on inner rotary table 11-2 drives the synchronous rotation of ratchet 11
Turn, the stir head 11-1 on ratchet 11 pushes the second pushing plate 8-4, the second pushing plate 8-4 to drive the second lock tongue 8 to pressure-bearing piston
To fully entering inside pressure-bearing piston 5, the second latch bolt spring 10 is compressed 5 internal motions, and pressure-bearing composite diaphragm 6 is opened, connection
Screw rod 12 drives balance 14 to be clockwise to yaw 14-1 vertical and block the first pushing plate to stretching out outside pressure-bearing piston 5
8-3 prevents the second lock tongue 8 from stretching out into through-hole 3；The one end of pressure-bearing composite diaphragm 6 far from bearing rod is turned to respect to bearing rod
The wall surface of through-hole 3 where first lock tongue 7 compresses the first lock tongue 7, and the first lock tongue 7 is pushed into inside pressure-bearing piston 5, injection
Fluid impacts coal storage layer by opening 1-1, through-hole 3 and jet orifice 4, forms primary pulsation hydraulic blow pressure break；
After the completion of pressure break, when the pressure of the fluid by opening 1-1 injection is equal to bottom pressure, pressure-bearing spring 2
Restoring force drives pressure-bearing piston 5 to move upwards, pressure-bearing piston 5 move upwards drive pressure-bearing composite diaphragm 6 and inner rotary table 11-2 to
Upper movement, the opposite triggering screw rod 1-2 of inner rotary table 11-2 is upward and rotates counterclockwise until being detached from triggering screw rod 1-2, and pressure-bearing is compound
The one end of partition 6 far from bearing rod is turned to respect to bearing rod far from 3 wall surface of through-hole where the first lock tongue 7, and the first lock tongue 7 exists
It is stretched out under the action of first latch bolt spring, 16 restoring force into through-hole 3, pressure-bearing composite diaphragm 6, which moves upwards and turns to closure, to be led to
Hole 3, pressure-bearing composite diaphragm 6 trigger connecting screw 12 to 5 internal motion of pressure-bearing piston, drive balance 14 to rotate, balance 14 rotates
It drives yaw 14-1 to rotate counterclockwise to far from the first pushing plate 8-3, is separated with the first pushing plate 8-3, the second lock tongue 8 is second
Stretched out under the action of 10 restoring force of latch bolt spring into through-hole 3, with the first lock tongue 7 support pressure-bearing composite diaphragm 6, pressure-bearing it is compound every
Plate 6 is closed, and carries injection pressure next time.
The above is only presently preferred embodiments of the present invention, not does any restrictions to the present invention, all according to invention skill
Art any simple modification substantially to the above embodiments, change and equivalent structural changes, still fall within the technology of the present invention
In the protection scope of scheme.
Claims (10)
1. a kind of strong hydraulic pulse generator of low frequency equal-pressure-difference, which is characterized in that including cylinder body (1), setting in the cylinder body (1)
There is press assembly；
The opening (1-1) for connected pipes is offered on the cylinder body (1), on the cylinder body (1) and far from opening (1-1)
It is offered on the side wall of one end jet orifice (4), the opening (1-1) is connected with jet orifice (4)；
The press assembly includes pressure-bearing piston (5) and the pressure-bearing spring (2) for being set to pressure-bearing piston (5) lower part, the pressure-bearing
It is offered on piston (5) through-hole (3), through-hole (3) face is open (1-1) and is connected with opening (1-1), the through-hole
(3) the pressure-bearing composite diaphragm (6) for blocking or opening through-hole (3) is provided in；It is connected on the pressure-bearing composite diaphragm (6)
For triggering the trigger device of pressure-bearing composite diaphragm (6) movement, the trigger device includes switch block and triggering screw rod (1-
2), the switch block includes the first lock tongue (7) and the second lock tongue for working in coordination and being located at pressure-bearing composite diaphragm (6) lower part
(8), second lock tongue (8) and one end far from the first lock tongue (7) are connected with the runner for driving the second lock tongue (8) to translate
One end of striking gear, triggering screw rod (1-2) is provided with the external screw thread for being threadedly coupled with the runner striking gear, triggers
The other end of screw rod (1-2) is fixed in cylinder body (1).
2. the strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference according to claim 1, which is characterized in that the runner is dialled
Dynamic device includes inner rotary table (11-2) and is set in the ratchet being arranged concentrically on the outside of inner rotary table (11-2) and with inner rotary table (11-2)
(11), the stir head (11-1) for stirring the second lock tongue (8) translation is fixed on the ratchet (11)；Inner rotary table (the 11-
2) it is hinged with the pawl (11-3) for rotating with inner rotary table (11-2) on, is provided on the ratchet (11) and pawl (11-3)
The asymmetric internal tooth of free end engagement.
3. the strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference according to claim 2, which is characterized in that the inner rotary table
The internal screw thread for being threadedly coupled with triggering screw rod (1-2) is provided on (11-2).
4. the strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference according to claim 2, which is characterized in that the pressure-bearing is living
The balance (14) for being additionally provided with connecting screw (12) in plug (5) and being sheathed on connecting screw (12)；The connecting screw (12)
Upper and close to balance (14) one end are arranged with connecting spring (13), and connecting screw is fixed in one end of the connecting spring (13)
(12) other end of bar portion, the connecting spring (13) is fixed on pressure-bearing piston (5)；It is arranged on the balance (14) useful
In the yaw (14-1) being clamped with the second lock tongue (8).
5. the strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference according to claim 4, which is characterized in that second lock
Tongue (8) includes the first pushing plate (8-3) for being clamped with yaw (14-1), and first pushing plate (8-3) is set to second
On the face of the close yaw (14-1) of lock tongue (8)；The stir head (11-1) pushes away by be set on the second lock tongue (8) second
Movable plate (8-4) is stirred the second lock tongue (8), and second pushing plate (8-4) is set to the close stir head (11- of the second lock tongue (8)
1) on face, the face of the close yaw (14-1) of second lock tongue (8) is vertical with close to the face of stir head (11-1)；Described
It is arranged on one lock tongue (7) the first latch bolt spring (16), the first lock tongue (7) are fixed in one end of first latch bolt spring (16)
On, the other end of first latch bolt spring (16) is fixed on pressure-bearing piston (5)；Is arranged on second lock tongue (8)
One end of two latch bolt springs (10), second latch bolt spring (10) is fixed on the second lock tongue (8), second latch bolt spring
(10) the other end is fixed on pressure-bearing piston (5).
6. the strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference according to claim 4 or 5, which is characterized in that the pendulum
The internal screw thread for being threadedly coupled with connecting screw (12) is provided on disk (14).
7. the strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference according to claim 1, which is characterized in that the pressure-bearing is multiple
It closes and is provided between partition (6) lower surface and the first lock tongue (7) for pressure-bearing composite diaphragm (6) and the first lock tongue of being slidably connected
(7) the first idler wheel (7-1) is provided with for the company of sliding between pressure-bearing composite diaphragm (6) lower surface and the second lock tongue (8)
Connect the second idler wheel (8-1) of pressure-bearing composite diaphragm (6) and the second lock tongue (8)；The pressure-bearing composite diaphragm (6) is close to the first lock tongue
(7) bearing rod for pressure-bearing composite diaphragm (6) to be connect with pressure-bearing piston (5) is provided on one end, on the bearing rod
It is provided with returning spring (15), one end of the returning spring (15) is fixed on pressure-bearing composite diaphragm (6), the returning spring
(15) the other end is fixed on pressure-bearing piston (5).
8. the strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference according to claim 1, which is characterized in that the pressure-bearing is multiple
The composite construction that partition (6) are steel plate and light material is closed, the density of the pressure-bearing composite diaphragm (6) is less than 1g/cm3, described
Light material includes low density foam.
9. the strong hydraulic pulse generator of a kind of low frequency equal-pressure-difference according to claim 1, which is characterized in that the pressure-bearing is living
The screw rod storehouse (5-1) for accommodating triggering screw rod (1-2) is offered on plug (5).
10. a kind of pulsation method for generation of the strong hydraulic pulse generator of low frequency equal-pressure-difference described in claim 1, feature exist
In, method includes the following steps:
When the pressure of the fluid by (1-1) injection that is open is greater than bottom pressure, pressure-bearing composite diaphragm (6) drives pressure-bearing piston
(5) it moves downward, pressure-bearing piston (5) drives runner striking gear to move downward, and runner striking gear is opposite to trigger screw rod (1-2)
It moves downward and rotates, the rotation of runner striking gear drives the second lock tongue (8) to pressure-bearing piston (5) internal motion to fully entering
Pressure-bearing piston (5) is internal, and pressure-bearing composite diaphragm (6) compresses the first lock tongue (7) to pressure-bearing piston (5) internal motion, and pressure-bearing is compound
Partition (6) is opened, and the fluid of injection impacts coal storage layer by opening (1-1), through-hole (3) and jet orifice (4), forms primary pulsation
Hydraulic blow pressure break；
After the completion of pressure break, pressure-bearing spring (2) restoring force drives pressure-bearing piston (5) to move upwards, and pressure-bearing piston (5) is transported upwards
Dynamic that pressure-bearing composite diaphragm (6) and runner striking gear is driven to move upwards, runner striking gear is mobile relative to screw rod (1-2) is triggered
And rotate, until runner striking gear is detached from triggering screw rod (1-2), stretching in the first lock tongue (7) Xiang Tongkong (3), the second lock tongue
(8) it is stretched out in Xiang Tongkong (3), the first lock tongue (7) and the second lock tongue (8) support pressure-bearing composite diaphragm (6), pressure-bearing composite diaphragm
(6) it is closed.
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| CN201910292265.6A CN110005356B (en) | 2019-04-12 | 2019-04-12 | Low-frequency equal-pressure-difference strong hydraulic pulse generator and pulse generation method thereof |
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| CN110005356B (en) | 2021-03-19 |
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