CN107830961A - A kind of underground hydrofracturing induces crack ultrasonic wave dynamic imaging device and system - Google Patents
A kind of underground hydrofracturing induces crack ultrasonic wave dynamic imaging device and system Download PDFInfo
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- CN107830961A CN107830961A CN201711276015.0A CN201711276015A CN107830961A CN 107830961 A CN107830961 A CN 107830961A CN 201711276015 A CN201711276015 A CN 201711276015A CN 107830961 A CN107830961 A CN 107830961A
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- ultrasonic
- ultrasonic wave
- imaging device
- hydrofracturing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0004—Force transducers adapted for mounting in a bore of the force receiving structure
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
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Abstract
Inducing crack ultrasonic wave dynamic imaging device and system, imaging device the invention provides a kind of underground hydrofracturing includes body, ultrasound imaging unit and drive mechanism.Body has the installation cavity surrounded by side wall, and side wall is provided with the sound transmitting window for blocking water and being available for ultrasonic wave to pass through.Ultrasound imaging unit includes at least one ultrasonic probe, and ultrasound imaging unit is movably installed on installation cavity, and the detection direction of ultrasonic probe is towards sound transmitting window.Drive mechanism is installed on installation cavity, and drive mechanism is connected with ultrasonic probe to drive axial direction and/or circumferential movement of the ultrasonic probe along body.The present apparatus does not have to cable, imaging data downhole stored, is read on well.Compared to traditional packing element impression method, not only time saving and energy saving, efficiency greatly improves；Avoid the risk for being imprinted on and being ground off when the vestige on stamp packing element surface carries brill by hole wall；More accurate hydraulic pressure especially can be also obtained in the case where drilling depth is larger, borehole conditions are complicated and induces crack imaging data.
Description
Technical field
The present invention relates to geostress survey technical field, induces crack in particular to a kind of underground hydrofracturing and surpasses
Sound wave dynamic imaging device and system.
Background technology
At present, crustal stress is the primary stress being present in earth's crust rock mass, and the important physical attribute ginseng of solid earth
One of number.Crustal stress is the root strength for causing rock mass deformation, unstability and destruction, and influences oil, shale gas, hot dry rock etc.
The important parameter of deep energy extraction.The measurement for thus carrying out crustal stress is operated in seismic mechanism research, energy extraction, mine tunnel
Road design, large-scale dam dam foundation construction etc. have important science and Practical significance.
The most important method of geostress survey is hydraulic fracturing.Hydraulic fracturing geostress survey is by the borehole
One section of rock open-hole is insulated, to packing section injection highly pressurised liquid, makes hole wall fracturing section rock mass that rupture occur to determine that crustal stress is big
A kind of small and method in direction.Party's law theory is ripe, it is easy to operate, fathom that big, cost is low, at present in worldwide
Inside it is widely used.
Complete hole wall rock mass will be produced after hydraulic fracturing two it is symmetrical, perpendicular to hole axle, parallel in 180 °
Induction crack, the azimuths in this pair of induction cracks then represent the direction of maximum horizontal principal stress.Obtain maximum horizontal master
The direction of stress is the important content for carrying out drilling hydraulic fracturing geostress survey.Existing acquisition maximum horizontal principal stress side
To method be mainly impression method, i.e., the vestige height for inducing crack is stamped in the vulcanization rubber on its surface using stamp packing element
On, this method simple, intuitive, but also have disadvantages that mainly have：Waste time and energy, efficiency is low, and lower brill is only capable of obtaining every time
The directional information of 1-2 test point；The vestige for being imprinted on stamp packing element surface is easy to be ground off by hole wall in drilling process；For
The larger drilling of stress value, it is also bigger due to inducing the stress opened again in crack, therefore be difficult clearly to stamp and will induce
Crack vestige.Above-mentioned several shortcomings are larger in drilling depth, experimental result influenceed in the case of borehole conditions complexity tighter
Weight.
The content of the invention
An object of the present invention be to provide a kind of underground hydrofracturing induce crack ultrasonic wave dynamic imaging device and
System, to obtain the azimuth that hole wall induces crack.
In order to solve the above-mentioned technical problem at least one in, the invention provides following technical scheme：
A kind of underground hydrofracturing induces crack ultrasonic wave dynamic imaging device, including：
Body, the body have the installation cavity that is surrounded by side wall, and the side wall is provided with and blocks water and be available for ultrasonic wave
The sound transmitting window of transmission；
Ultrasound imaging unit, the ultrasound imaging unit include at least one ultrasonic probe, and the ultrasound imaging unit can
It is movably arranged in the installation cavity, the detection direction of the ultrasonic probe is towards the sound transmitting window；
Drive mechanism, the drive mechanism is installed on the installation cavity, and the drive mechanism passes with the ultrasonic probe
It is dynamic to connect to drive axial direction and/or circumferential movement of the ultrasonic probe along body.
Further, in the alternative embodiment of the present invention, the underground hydrofracturing induce crack ultrasonic wave dynamic into
Picture device also includes central shaft, and ultrasound imaging unit also includes mounting seat, and the ultrasonic probe is installed on the mounting seat, described
Mounting seat is movably sheathed on the periphery of the central shaft, and the drive mechanism is connected with the mounting seat；Preferably,
The central shaft has axially extending bore；Preferably, the central shaft is made up of metal material.
Further, in the alternative embodiment of the present invention, the drive mechanism includes active straight spur gear, driven
Straight spur gear and power set；The power output portion transmission of the active straight spur gear and the power set connects
Connect, the driven straight spur gear is connected with the central axle threads to form lead screw pair, and the driven straight tooth column tooth
Wheel engages with the active straight spur gear；The driven straight spur gear is with the mounting seat in circumferential and/or axial direction
It is fixedly connected.
Further, in the alternative embodiment of the present invention, the driven straight spur gear is with the mounting seat in week
It is fixedly connected with to axial direction.
Further, in the alternative embodiment of the present invention, the power set are motor；In the installation cavity filling by
Insulate silicone oil；Preferably, the motor is DC brushless motor.
Further, in the alternative embodiment of the present invention, the installation cavity also includes a battery installation cavity, the battery
Battery is installed, the battery is connected with the ultrasonic probe and motor counter electrode in installation cavity.
Further, in the alternative embodiment of the present invention, the ultrasonic wave dynamic imaging device also includes pressure switch,
The pressure switch has a pressure input unit and electric signal output portion, and the pressure input site is in outside the body, the electricity
Signal output portion is located in the body and is connected with the motor and ultrasonic probe counter electrode, and the pressure switch is configured
Start the motor and ultrasonic probe when reaching preset value into the pressure that liquid in drilling is received when pressure input unit.
Further, in the alternative embodiment of the present invention, the ultrasonic probe includes ultrasonic transmitter and reception is changed
Energy device, the receive transducer are configured to receive the ultrasonic wave letter for being sent by the ultrasonic transmitter and being reflected back by the borehole wall
Number；Preferably, the receive transducer is the transducer of piezo crystal.
Further, in the alternative embodiment of the present invention, the quantity of the ultrasonic probe is 2, the sound transmitting window edge
Circumferentially disposed one week of the body；Preferably, the detection direction of 2 ultrasonic probes is along the radial direction of the body
Outwards and angle is 180 °.
Further, in the alternative embodiment of the present invention, in addition to appearance line linkage unit and slip ring, the slip ring are arranged
In the periphery of the central shaft and it is fixed in the housing, the appearance line linkage unit is in hollow slim-lined construction on the whole,
Its internal accommodating cavity with accommodating electric lead；The appearance line linkage unit is in diametrically rigidity and length can in the axial direction
Become；Described one end for holding line linkage unit is with the slip ring axial restraint and is circumferentially slidably connected, the appearance line linkage unit
The other end is fixedly connected with the mounting seat.
Further, in the alternative embodiment of the present invention, the slip ring has the annular groove around the central shaft,
Anode ring and negative pole ring are fixed with the annular groove, have between the anode ring and the negative pole ring interval and it is insulated from each other
Set；The end set being connected with the appearance line linkage unit for holding line linkage unit has positive pole sliding block and negative pole to slide
Block；The positive pole sliding block with the anode ring fix and be slidably connected in the circumferential by the relative position on axially and radially；
The negative pole sliding block is fixed with negative pole ring relative position on axially and radially and is slidably connected in the circumferential.
Further, in the alternative embodiment of the present invention, the opening of the annular groove is provided with axial limiting portion,
The end being connected with the appearance line linkage unit for holding line linkage unit is in T fonts substantially, and the end has radially
Outside annular flange, the annular groove limit the free degree of the annular flange with the axial limiting portion jointly, so that should
Flange is in axial restraint and circumferential movable.
Further, in the alternative embodiment of the present invention, the A/F of the annular groove and the appearance line linkage
The radial dimension of component is adapted, diametrically substantially stationary to limit the appearance line linkage unit and the slip ring.
Further, in the alternative embodiment of the present invention, the positive pole counter electrode connection of the anode ring and battery, institute
Negative pole ring is stated to be connected with the negative pole counter electrode of the battery.
Further, in the alternative embodiment of the present invention, it is equipped with and institute in the accommodating cavity for holding line linkage unit
State motor and positive electric lead and the negative electricity wire of ultrasonic probe counter electrode connection, positive electric lead electricity corresponding with positive pole sliding block
Pole is connected, and negative electricity wire is connected with negative pole sliding block counter electrode.
Further, in the alternative embodiment of the present invention, the appearance line linkage unit includes the first spool and the second line
Pipe, first spool is connected with the slip ring and the annular flange is located at the one end of first spool, and described the
The other end of one spool is slidably received in the tube chamber of second spool, and second spool is fixed with the mounting seat
Connection.
Present invention also offers a kind of hydrofracturing to induce crack ultrasonic imaging system, including any of the above-described kind of mine water
Fracturing is pressed to induce crack ultrasonic wave dynamic imaging device, in addition to ultrasonic signal process circuit, the ultrasonic signal processing
Circuit is configured to for ultrasonic signal to be converted into the image information for inducing slight crack.
The beneficial effects of the invention are as follows：The underground hydrofracturing that the present invention is obtained by above-mentioned design induces crack ultrasonic wave
Dynamic imaging device and system, in use, drive mechanism can drive ultrasonic probe in the axial direction of body interior edge body and/or week
Moved to motion, ultrasonic probe can may pass through the ultrasonic signal of sound transmitting window by transmitting-receiving, can be obtained by ultrasonic imaging technique
The borehole wall is taken to induce the situation in crack.It is not only time saving and energy saving compared to traditional impression method, efficiency high；Avoid using tradition print
During modulus method, the risk that the vestige on stamp packing element surface is ground off in drilling process by hole wall is imprinted on；Even in drilling depth it is larger,
More accurate data can be obtained in the case of borehole conditions complexity.Moreover, ultrasonic probe can induce not influenceing the borehole wall
On the premise of crack, moved towards multiple directions, to obtain the directional information of more test points, bore the test point that can be obtained down every time
Directional information can expand to unlimited and (be generally only 1-2 using impression method).
Further, the present apparatus does not use Acquisition Instrument on cable connection well to be popped one's head in Acoustic, imaging data underground
Real-time storage, read on well.
Brief description of the drawings
, below will be to required use in embodiment in order to illustrate more clearly of the technical scheme of embodiment of the present invention
Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not to be seen as
It is the restriction to scope, for those of ordinary skill in the art, on the premise of not paying creative work, can be with root
Other related accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is that the underground hydrofracturing provided in an embodiment of the present invention with boring pressure adjusting means induces crack ultrasonic wave
The schematic diagram of dynamic imaging device；
Fig. 2 is the signal that underground hydrofracturing provided in an embodiment of the present invention induces crack ultrasonic wave dynamic imaging device
Figure；
Fig. 3 is Fig. 2 partial enlarged drawing；
The schematic diagram of Fig. 4 boring pressure adjusting meanss provided in an embodiment of the present invention.
Icon：S1- top connections；S2- battery installation cavitys；S4- slip rings；S41- positive pole sliding blocks；S42- negative pole sliding blocks；S43- axles
To limiting section；S5- holds line linkage unit；The spools of S51- first；S511- anode rings；S512- negative pole rings；S513- annular flanges；
The spools of S52- second；S6- ultrasonic probes；S7- bodys；S71- sound transmitting windows；S8- active straight spur gears；The driven straight-tooth circles of S9-
Stud wheel；S10- power set；S11- pressure balancing pistons；S12- fuel feeding valves；S13- gate gurgle valves；S14- pressure switches；S15-
Central shaft；S16- lower contacts；S17- pressure chambers；S18- driving members.
Embodiment
To make the purpose, technical scheme and advantage of embodiment of the present invention clearer, implement below in conjunction with the present invention
Accompanying drawing in mode, the technical scheme in embodiment of the present invention is clearly and completely described, it is clear that described reality
The mode of applying is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained under the premise of creative work is not made, belongs to the present invention
The scope of protection.Therefore, below the detailed description of the embodiments of the present invention to providing in the accompanying drawings be not intended to limit will
The scope of the present invention of protection is sought, but is merely representative of the selected embodiment of the present invention.Based on the embodiment in the present invention,
The every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, belong to this
Invent the scope of protection.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise " are based on orientation shown in the drawings or position relationship, are for only for ease of
Description is of the invention to be described with simplified, rather than the equipment or element of instruction or hint meaning must be with specific orientation, Yi Te
Fixed azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the invention, " multiple " are meant that two or more,
Unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；It can be direct phase
Even, it can also be indirectly connected by intermediary, can be that the connection of two element internals or the interaction of two elements are closed
System.For the ordinary skill in the art, above-mentioned term in the present invention specific can be understood as the case may be
Implication.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it " under "
Can directly it be contacted including the first and second features, it is not directly to contact but pass through it that can also include the first and second features
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " to include first special
Sign is directly over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " fisrt feature that includes are immediately below second feature and obliquely downward, or be merely representative of
Fisrt feature level height is less than second feature.
Embodiment
As shown in figure 1, present embodiments providing a kind of underground hydrofracturing with boring pressure adjusting means induces crack
Ultrasonic wave dynamic imaging device, it includes underground hydrofracturing and induces crack ultrasonic wave dynamic imaging device and boring pressure regulation
Device.Underground hydrofracturing induces crack ultrasonic wave dynamic imaging device and boring pressure adjusting means is shown in Fig. 2 and Fig. 4 institutes respectively
Show.Fig. 2 and Fig. 4 is Fig. 1 left and right two parts respectively.In the present embodiment, underground hydrofracturing induces crack ultrasonic wave dynamic
Imaging device and boring pressure adjusting means share an a body S7 and central shaft S15.In other implementations, underground hydraulic pressure
Fracturing, which induces crack ultrasonic wave dynamic imaging device, to be combined with the boring pressure adjusting means of other structures.Boring pressure
Adjusting means, which combines, to induce the combination of crack ultrasonic wave dynamic imaging device with the underground hydrofracturing of other structures.
Crack ultrasonic wave dynamic imaging first is induced to the underground hydrofracturing that the present embodiment provides with reference to Fig. 2 and Fig. 3
Device is described.
A kind of underground hydrofracturing induce crack ultrasonic wave dynamic imaging device, including body S7, ultrasound imaging unit with
And drive mechanism.
Wherein, body S7 both ends are respectively arranged with top connection S1 and lower contact S16.Body S7 has what is surrounded by side wall
We define it as installation cavity (close to top connection S1) to the left part of cavity, wherein cavity, right part we define it and be
Pressure balance chamber (close to lower contact S16).
Surround installation cavity side wall some be sound transmitting window S71, sound transmitting window S71 blocks water and is available for ultrasonic wave to pass through.
Optional polytetrafluoroethylene (PTFE) is as the material for preparing sound transmitting window S71.In the present embodiment, sound transmitting window S71 is circumferentially disposed along body S7
Cirque structure.
Ultrasound imaging unit includes at least one ultrasonic probe S6, and ultrasound imaging unit is movably installed on installation cavity,
Ultrasonic probe S6 detection direction is towards sound transmitting window S71.
Further, in the alternative embodiment of the present invention, ultrasonic probe S6 includes ultrasonic transmitter and receives transducing
Device, receive transducer are configured to receive the ultrasonic signal for being sent by ultrasonic transmitter and being reflected back by the borehole wall；Preferably,
Receive transducer is the transducer of piezo crystal.
Ultrasonic transmitter and receive transducer can correspond to set, can also a ultrasonic transmitter correspondence
At least two receive transducers.Such as a ultrasonic transmitter is arranged on centre, and multiple receive transducers circumferentially between
Every setting, you can the information in the multiple orientation of the detection borehole wall.
Further, in the alternative embodiment of the present invention, ultrasonic probe S6 quantity is 2.Preferably, 2 ultrasounds
Pop one's head in S6 detection direction along body S7 radially outward and angle is 180 °.
Drive mechanism is installed on installation cavity, and drive mechanism is connected with ultrasonic probe S6 to drive ultrasonic probe S6 edges
Body S7 axial direction and/or circumferential movement.
In other words, drive mechanism may be configured to drive ultrasonic probe S6 only along body S7 axial movement also may be used
To be configured to drive ultrasonic probe S6 only along body S7 circumferential movement, to can be configured to drive ultrasonic probe S6 along pipe
Body S7 axial and circumferential can move.In the present embodiment, drive mechanism may be configured to drive ultrasonic probe S6 edges
Body S7 axial and circumferential can move.More multi-faceted borehole wall information can so be obtained.
It is possible to further install gyro-magnetic compass in installation cavity to record ultrasonic probe S6 orientation, in order to obtain
Know the orientation in the crack monitored.
Further, in the alternative embodiment of the present invention, underground hydrofracturing induces crack ultrasonic wave dynamic imaging dress
Putting also includes central shaft S15, and ultrasound imaging unit also includes mounting seat, and ultrasonic probe S6 is installed on mounting seat, and mounting seat can live
Central shaft S15 periphery is sheathed on dynamicly, and drive mechanism is connected with mounting seat.Preferably, central shaft S15 has axially logical
Hole.Further, in the present embodiment, central shaft S15 is made up of metal material.Compared to flexible pipe, central shaft S15 belongs to firm
Property pipe, not only bearing capacity is more preferable, and can be as the guide frame of mounting seat.
Further, in the alternative embodiment of the present invention, drive mechanism includes active straight spur gear S8, driven straight
Tooth roller gear S9 and power set S10；Active straight spur gear S8 and power set S10 power output portion transmission connects
Connect, driven straight spur gear S9 is threadedly coupled with central shaft S15 to form lead screw pair, and driven straight spur gear S9 and master
Dynamic straight spur gear S8 engagements；Driven straight spur gear S9 is connected with mounting seat in circumference and/or axial restraint.It is driven straight
The connection of tooth roller gear S9 and mounting seat can with corresponding with desired ultrasonic probe S6 motion mode.In this reality
Apply in example, driven straight spur gear S9 is fixedly connected with mounting seat in circumferential and axial.
Further, in the alternative embodiment of the present invention, ultrasonic wave dynamic imaging device also includes pressure switch S14,
Pressure switch S14 has a pressure input unit and electric signal output portion, and pressure input site is in outside body S7, electric signal output position
It is connected in body S7 and with motor and ultrasonic probe counter electrode, pressure switch S14 is configured to when pressure input unit receives
Start motor and ultrasonic probe when the pressure of liquid reaches preset value in drilling.
During using this pressure switch S14, if pressure when default pressure value starts with pressure break is correspondingly arranged, pressure break
Completed with imaging function in the same time, realize that certain hole section length induces the imaging in crack.
Further, the time of ultrasonic imaging is also that can be performed with default in a preset time that can be upon actuation,
Then it is automatic to terminate.
Further, in the alternative embodiment of the present invention, power set S10 is motor；Filling is by insulating in installation cavity
Silicone oil.Preferably, in the present embodiment, motor is DC brushless motor.Motor is impregnated in insulation silicone oil.
Further, in embodiment, installation cavity also includes a battery installation cavity S2, and electricity is provided with battery installation cavity S2
Pond, battery are connected with ultrasonic probe S6 and motor counter electrode.
Further, in the alternative embodiment of the present invention, can also include holding line linkage unit S5 and slip ring S4, slip ring
S4 is sheathed on central shaft S15 periphery and is fixed in body S7, and it is in hollow slim-lined construction on the whole to hold line linkage unit S5,
Its internal accommodating cavity with accommodating electric lead；Appearance line linkage unit S5 is in diametrically rigidity and length is variable in the axial direction；
Hold line linkage unit S5 one end and slip ring S4 axial restraints and the circumferential other end and peace for being slidably connected, holding line linkage unit S5
Dress seat is fixedly connected.
Further, slip ring S4 has the annular groove around central shaft S15, and anode ring S511 is fixed with annular groove
With negative pole ring S512, there are interval and setting insulated from each other between anode ring S511 and negative pole ring S512；Hold line linkage unit S5's
The end set being connected with holding line linkage unit S5 has positive pole sliding block S41 and negative pole sliding block S42；Positive pole sliding block S41 and positive pole
Ring S511 relative positions on axially and radially are fixed and are slidably connected in the circumferential；Negative pole sliding block S42 and negative pole ring
S512 relative positions on axially and radially are fixed and are slidably connected in the circumferential.
In this way, so that positive pole sliding block S41 and anode ring S511 is in counter electrode connection status all the time, also so that bearing
Pole sliding block S42 and negative pole ring S512 is in counter electrode connection status all the time.Anode ring S511, negative pole ring S512, positive pole sliding block
S41 and negative pole sliding block S42 are made of electrically conductive material, such as metal, it is possible to further be copper.Further, annular groove
Opening be provided with axial limiting portion S43, hold line linkage unit S5 with to hold the end that line linkage unit S5 is connected basic
In T fonts, the end has annular flange S513 radially, and annular groove limits jointly with axial limiting portion S43 should
The annular flange S513 free degree, so that the flange is in axial restraint and circumferential movable.
Further, the A/F of annular groove is adapted with holding line linkage unit S5 radial dimension, is held with limiting
Line linkage unit S5 is diametrically substantially stationary with slip ring S4.The A/F of annular groove refers to the opening of annular groove in
The width of mandrel S15 radial direction.
When ultrasonic probe S6 rotates around central shaft S15, hold line linkage unit S5 and also rotated around central shaft S15.And
And hold line linkage unit S5 under the position-limiting action of annular groove, keep relative position to fix in the axial direction with slip ring S4, and hold
Line linkage unit S5 can circumferentially on relative to slip ring S4 slide.
Further, the positive pole counter electrode of anode ring S511 and battery connects, the negative pole pair of negative pole ring S512 and battery
Electrode is answered to connect.
Further, hold to be equipped with line linkage unit S5 accommodating cavity and be connected with motor and ultrasonic probe S6 counter electrodes
Positive electric lead and negative electricity wire, positive electric lead is connected with positive pole sliding block S41 counter electrodes, negative electricity wire and negative pole sliding block S42
Counter electrode connects.
Further, holding line linkage unit S5 includes the first spool S51 and the second spool S52, the first spool S51 and slip ring
S4 connections and annular flange S513 are located at the first spool S51 one end, and the first spool S51 the other end slideably holds
The second spool S52 tube chamber is placed in, the second spool S52 is fixedly connected with mounting seat.
When axial movements of the ultrasonic probe S6 along central shaft S15, it is scalable to hold line linkage unit S5, the first spool S51
Length positioned at the second spool S52 tube chamber inside points can also change.
The present embodiment additionally provides a kind of ultrasonic imaging system, including any of the above-described kind of underground hydrofracturing induces crack
Ultrasonic wave dynamic imaging device, in addition to ultrasonic signal process circuit, ultrasonic signal process circuit are configured to ultrasound
Ripple signal is converted into the image information for inducing crack.
Radiating circuit excitation ultrasonic transmitter work can be set, and the signal of receive transducer collection can digitize place
Reason, corresponding reception can realize high-precision digitized signal with Acquisition Circuit, and reception will be realized with Acquisition Circuit：Preceding storing
Greatly, filtering, automatic gain control, ADC collections etc..Specific calculation system and the circuit being related to belong to prior art, herein not
Repeat again.
When sound transmitting window S71 is made using polytetrafluoroethylene (PTFE), due to polytetrafluoroethylmaterial material bearing capacity deficiency.Drilling is set
The purpose of pressure-regulating device is primarily to balance installation cavity and the pressure outside body S7, avoid sound transmitting window S71 by pressure
Damage.
With reference to Fig. 4, provide boring pressure adjusting means to the present embodiment and be introduced.
Boring pressure adjusting means mainly includes pressure balancing piston S11, driving member S18, fuel feeding valve S12 and gate gurgle valve
S13.Boring pressure adjusting means and underground hydrofracturing induce crack ultrasonic wave dynamic imaging device share a body S7 and
Central shaft S15, central shaft S15 are arranged in body S7 and coaxial with body S7.
Cavity is separated into installation cavity and pressure regulating cavity independent of each other by pressure balancing piston S11.
Lower contact S16 is installed on body S7 end, lower contact S16 and body S7 and central shaft S15 axial directions dynamic sealing, under
Joint S16 and central shaft S15 surrounds an independent pressure chamber S17.Driving member S18 both ends respectively with pressure balancing piston S11
And lower contact S16 against.Further, driving member S18 is elastic component.Further, driving member S18 is bullet in the present embodiment
Spring.
Fuel feeding valve S12 oil-out connects with pressure chamber S17, and fuel feeding valve S12 is configured to receive control signal and can be to
Pressure chamber S17 injects pressure oil, so that lower contact S16 is away from pressure balancing piston S11.
Gate gurgle valve S13 oil inlet connects with pressure chamber S17, and gate gurgle valve S13 is configured to receive control signal and can arranged
The pressure oil gone out in pressure chamber S17, so that lower contact S16 is close to pressure balancing piston S11.
Further, boring pressure adjusting means also includes pressure sensor, and pressure sensor is configured to monitor body
The pressure and output control signal of pressure and installation cavity outside S7.
For example, when pipe external pressure is more than the pressure in installation cavity, pressure oil in gate gurgle valve S13 discharge pressure chambers S17 with
Make lower contact S16 close to pressure balancing piston S11, driving member S18 promotes pressure balancing piston S11 to left movement, in installation cavity
Pressure increase.When pipe external pressure is less than the pressure in installation cavity, fuel feeding valve S12 injects pressure oil, lower contact to pressure chamber S17
S16 moves right away from pressure balancing piston S11, dummy piston, and the pressure in installation cavity reduces.Make the pressure in installation cavity with this
Power and pipe external pressure are basically identical.
The preferred embodiment of the present invention is these are only, is not intended to limit the invention, for the technology of this area
For personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of underground hydrofracturing induces crack ultrasonic wave dynamic imaging device, it is characterised in that including：
Body, the body has the installation cavity surrounded by side wall, and the side wall is provided with and blocks water and be available for ultrasonic wave to pass through
Sound transmitting window；
Ultrasound imaging unit, the ultrasound imaging unit include at least one ultrasonic probe, and the ultrasound imaging unit is movable
Ground is installed on the installation cavity, and the detection direction of the ultrasonic probe is towards the sound transmitting window；
Drive mechanism, the drive mechanism is installed on the installation cavity, and the drive mechanism connects with ultrasonic probe transmission
Connect the axial direction and/or circumferential movement to drive the ultrasonic probe along body.
2. underground hydrofracturing according to claim 1 induces crack ultrasonic wave dynamic imaging device, it is characterised in that institute
Stating ultrasonic wave dynamic imaging device also includes central shaft, and ultrasound imaging unit also includes mounting seat, and the ultrasonic probe is installed on
The mounting seat, the mounting seat are movably sheathed on the periphery of the central shaft, the drive mechanism and the mounting seat
Drive connection；Preferably, the central shaft has axially extending bore；Preferably, the central shaft is made up of metal material.
3. underground hydrofracturing according to claim 2 induces crack ultrasonic wave dynamic imaging device, it is characterised in that institute
Stating drive mechanism includes active straight spur gear, driven straight spur gear and power set；The active straight tooth column
The power output portion of gear and the power set is connected, and the driven straight spur gear connects with the central axle threads
Connect to form lead screw pair, and the driven straight spur gear engages with the active straight spur gear；The driven straight-tooth
Roller gear is connected with the mounting seat in circumference and/or axial restraint.
4. underground hydrofracturing according to claim 3 induces crack ultrasonic wave dynamic imaging device, it is characterised in that institute
Driven straight spur gear is stated to be fixedly connected with circumferential and axial with the mounting seat.
5. underground hydrofracturing according to claim 3 induces crack ultrasonic wave dynamic imaging device, it is characterised in that institute
It is motor to state power set；Filling is by insulation silicone oil in the installation cavity；Preferably, the motor is DC brushless motor.
6. underground hydrofracturing according to claim 5 induces crack ultrasonic wave dynamic imaging device, it is characterised in that institute
Stating installation cavity also includes a battery installation cavity, and battery, the battery and the ultrasonic probe are provided with the battery installation cavity
And motor counter electrode connection.
7. underground hydrofracturing according to claim 5 induces crack ultrasonic wave dynamic imaging device, it is characterised in that institute
Stating ultrasonic wave dynamic imaging device also includes pressure switch, and the pressure switch has pressure input unit and electric signal output portion,
The pressure input site in outside the body, the electric signal output portion be located in the body and with the motor and ultrasound
Counter electrode of popping one's head in connects, and the pressure that the pressure switch is configured to receive liquid in drilling when pressure input unit reaches pre-
If start the motor and ultrasonic probe during value.
8. underground hydrofracturing according to claim 1 induces crack ultrasonic wave dynamic imaging device, it is characterised in that institute
Stating ultrasonic probe includes ultrasonic transmitter and receive transducer, and the receive transducer is configured to receive by the ultrasonic wave
The ultrasonic signal that transmitter sends and is reflected back by the borehole wall；Preferably, the receive transducer is the transducing of piezo crystal
Device；Preferably, the ultrasonic probe includes a ultrasonic transmitter and multiple receive transducers.
9. underground hydrofracturing according to claim 1 induces crack ultrasonic wave dynamic imaging device, it is characterised in that institute
The quantity for stating ultrasonic probe is 2, and the sound transmitting window was along circumferentially disposed one week of the body；Preferably, described 2 it is described super
The detection direction of sonic probe along the body radially outward and angle is 180 °.
10. a kind of hydrofracturing induces crack ultrasonic imaging system, it is characterised in that including any according to claim 1-9
Underground hydrofracturing described in induces crack ultrasonic wave dynamic imaging device, in addition to ultrasonic signal process circuit, described
Ultrasonic signal process circuit is configured to for ultrasonic signal to be converted into the image information for inducing crack.
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Effective date of registration: 20180917 Address after: 100081 11 South Road, Haidian District Nationalities University, Beijing Co-patentee after: Institute of acoustics, Chinese Academy of Sciences Patentee after: Institute of Geomechanics, Chinese Academy of Gelogical Sciences Address before: 100000 11 South Road, Haidian District Nationalities University, Beijing Patentee before: Institute of Geomechanics, Chinese Academy of Gelogical Sciences |
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