CN106054241B - Nonpetroleum measurement while drilling seismic detection device - Google Patents
Nonpetroleum measurement while drilling seismic detection device Download PDFInfo
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- CN106054241B CN106054241B CN201610408933.3A CN201610408933A CN106054241B CN 106054241 B CN106054241 B CN 106054241B CN 201610408933 A CN201610408933 A CN 201610408933A CN 106054241 B CN106054241 B CN 106054241B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
- G01V1/181—Geophones
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Abstract
A kind of nonpetroleum measurement while drilling seismic detection device, ontology is installed including drill collar, and the hydraulic thrust of drill collar installation ontology is set to by system and signal detection system, the hydraulic thrust includes that hydraulic thrust leans on mechanism and at least one hydraulic thrust to lean on block by system, the hydraulic thrust is equipped with wave detector by block, to be detected to seismic wave, the wave detector includes metal shell, quartz crystal and driving source circuit board, the quartz crystal is installed in rigid metal shell, the side of the metal shell is equipped with driving source circuit board, it is connected in quartz crystal by two coaxial cables, its frequency sweep alternate electrical signal that can provide changeable frequency vibrates it at different frequencies to quartz crystal；The present invention is big to seismic wave measurement responding range as a result, and seismic signal high resolution is conducive to efficiently measurement and is excited by ground frequency sweep focus and along the frequency sweep seismic signal of earth-layer propagation to underground.
Description
Technical field
The present invention relates to the technical field of petroleum measurement while drilling seismic survey more particularly to a kind of nonpetroleum measurement while drillings
Seismic detection device.
Background technique
The coil and mems accelerometer of traditional geophone design, small to seismic wave measurement responding range, ground
It is inadequate to shake signal resolution, is unfavorable for efficiently measuring and is excited by ground frequency sweep focus and along the frequency sweep of earth-layer propagation to underground
Shake signal.
For this purpose, designer of the invention, in view of drawbacks described above, by concentrating on studies and designing, synthesis is engaged in for many years for a long time
The experience and achievement of related industry, researching and designing go out a kind of nonpetroleum measurement while drilling seismic detection device, to overcome above-mentioned lack
It falls into.
Summary of the invention
The purpose of the present invention is to provide a kind of nonpetroleum measurement while drilling seismic detection devices can solve the prior art
Defect, big to seismic wave measurement responding range, seismic signal high resolution is conducive to efficiently measure by ground frequency sweep focus
It excites and along the frequency sweep seismic signal of earth-layer propagation to underground.
To solve the above problems, the invention discloses a kind of nonpetroleum measurement while drilling seismic detection device, including drill collar
Installation ontology and the hydraulic thrust for being set to drill collar installation ontology lean on system and signal detection system, it is characterised in that:
The hydraulic thrust includes that hydraulic thrust leans on mechanism and at least one hydraulic thrust to lean on block by system, and the hydraulic thrust leans on machine
Structure is connected to hydraulic thrust by block to realize hydraulic thrust by pressing or disengaging of the block to the borehole wall and/or stratum, and the hydraulic thrust leans on block
Equipped with wave detector, to be detected to seismic wave,
The wave detector includes metal shell, quartz crystal and driving source circuit board, the quartz crystal peace
In metal shell loaded on rigidity, the side of the metal shell is equipped with driving source circuit board, passes through two coaxial cables
It is connected in quartz crystal, the frequency sweep alternate electrical signal that can provide changeable frequency makes it in difference to quartz crystal
Frequency under vibrate.
Wherein: the wave detector also includes elastic metallic diaphragm, upper metal block pedestal and lower metal block pedestal, outside metal
Elastic metallic diaphragm is embedded in the one side of shell, the upper and lower ends of the quartz crystal are separately connected metal block pedestal under
The other end of metal block pedestal, the upper metal block pedestal is connect with elastic metallic diaphragm, the lower metal block pedestal it is another
End is connect with metal shell.
Wherein: the signal detection system includes underground governor circuit, signal storage circuit and signal measurement Acquisition Circuit,
The underground governor circuit is connected to signal storage circuit and signal measurement Acquisition Circuit to realize reception and the control letter of signal
Number output, the signal measurement Acquisition Circuit be electrically connected to wave detector be responsible for measurement acquisition three repacking waves output earthquake letter
Number and pass to underground governor circuit, the signal storage circuit is responsible for the seismic signal of storage acquisition.
Wherein: the hydraulic thrust is additionally provided with pressure sensor in block, and the hydraulic thrust is hydraulic comprising being connected to by mechanism
The backup oil cylinder of backup block, the backup oil cylinder are connected to hydraulic thrust by block to realize hydraulic-driven.
Wherein: the hydraulic thrust also includes not rotate protective case by mechanism, and the center for not rotating protective case is equipped with one
Both ends are respectively connected to the central axis of drill bit and drilling rod, and the central axis is rotatable to be attached the two, do not rotate protection
It is attached between set and central axis by a capacity eccentric bearing.
Wherein: the hydraulic thrust also includes plunger pump and hydraulic cylinder by mechanism, and the protective case that do not rotate is connected to
The connecting rod of plunger pump, the plunger pump are respectively connected to hydraulic cylinder and backup by the first non-return valve and the second non-return valve
The front and back end of oil cylinder, second non-return valve passes through overflow valve respectively and solenoid valve is connected to hydraulic cylinder.
Wherein: the vibration stimulus source of the driving source circuit board generates frequency sweep vibration voltage signal and carries out detection acquisition,
One electric current AD acquisition unit detects the current peak on coaxial cable, to judge whether quartz crystal diaphragm is in resonance state,
Illustrate that quartz crystal has been in resonance state if electric current reaches peak value, vibrational excitation source frequency at this moment is quartz
The resonant frequency of crystal microchip, it should stop frequency sweep control, stablize vibration stimulus source on existing resonant frequency, with earthquake
Relationship between resonating quartz crystal slice-shaped variable Δ X caused by the departure freqency and seismic signal of change in signal strength is such as public
Formula one:
In formula
F2-with earthquake change in signal strength departure freqency；
KX-quartz crystal coefficient of elasticity；
F1-quartz crystal resonant frequency；
D-quartz crystal diameter.
Wherein: including a capacitor compensating circuit, quartz crystal itself stray capacitance is solved by capacitor compensating circuit and is drawn
The resonant frequency shift risen improves signal-to-noise ratio, improves the precision of quartz crystal detection seismic wave.
By above structure it is found that nonpetroleum measurement while drilling seismic detection device of the invention has the effect that
1, it using quartz crystal, corresponding mechanical structure and corresponding peripheral circuit, is shaken in underground monitoring ground frequency sweep
The seismic wave of source excitation.It avoids and is designed using the coil and mems accelerometer of traditional geophone, seismic wave is measured
Responding range is big, applied widely.
2, seismic signal high resolution is conducive to efficiently measurement and is excited by ground frequency sweep focus and along earth-layer propagation to well
Under frequency sweep seismic signal.
Detailed content of the invention can be obtained by aftermentioned explanation and institute's attached drawing.
Detailed description of the invention
Fig. 1 shows the structural schematic diagram of nonpetroleum measurement while drilling seismic detection device of the invention.
Fig. 2 shows that hydraulic thrust is by the structural schematic diagram of system in the present invention.
Fig. 3 shows the structural schematic diagram of wave detector in the present invention.
Fig. 4 shows that the vibration stimulus source of driving source circuit board of the present invention generates frequency sweep vibration voltage signal and carries out detection
The schematic diagram of acquisition.
Fig. 5 shows that quartz crystal is in the connection circuit of oscillating circuit in the present invention.
Fig. 6 shows the equivalent circuit of quartz crystal in the present invention.
Fig. 7 shows the circuit demodulation principle figure in the present invention.
Fig. 8 shows the schematic diagram of frequency-voltage conversion circuit in the present invention.
Appended drawing reference:
Drill collar installs ontology 1, four core Bussing connectors 2, clock sync cap 3, double C battery sleeves 4, precision interval clock source 5, well
Lower governor circuit 6, signal high-speed playback interface 7, signal storage circuit 8, signal measurement Acquisition Circuit 9, hydraulic thrust by mechanism 10,
First hydraulic thrust is by block 11, the second hydraulic thrust by block 12, third hydraulic thrust by block 13, wave detector 14, pressure sensor 15, hydraulic
Oil cylinder 16, the first non-return valve 17, plunger pump 18, capacity eccentric bearing 19, the second non-return valve 20, backup oil cylinder 21, pressure measurement
Circuit 22, solenoid valve 23, overflow valve 24, metal shell 25, elastic metallic diaphragm 26, quartz crystal 27, upper metal block base
Seat 28, lower metal block pedestal 29, driving source circuit board 30, coaxial cable 31, multiple twin coaxial cable 32.
Specific embodiment
Referring to Fig. 1, it is shown that nonpetroleum measurement while drilling seismic detection device of the invention.
The nonpetroleum measurement while drilling seismic detection device includes that drill collar installs ontology 1 and is set to drill collar installation
The hydraulic thrust of ontology 1 leans on system and signal detection system, and the hydraulic thrust includes hydraulic thrust by mechanism 10 and at least by system
One hydraulic thrust leans on block, the hydraulic thrust by mechanism 10 be connected to hydraulic thrust by block with realize hydraulic thrust by block to the borehole wall and/or
The pressing or disengaging on stratum, the hydraulic thrust is equipped with wave detector by block, to detect to seismic wave.
Referring to Fig. 1, the hydraulic thrust may include that the first hydraulic thrust leans on block 11, the second hydraulic thrust by block 12 and third liquid by block
Backup block 13 is pressed, and separately includes wave detector, X is acquired to the rectified signal of, Y-direction and Z-direction with providing, three axis are collectively formed
Detection function.
The signal detection system may include underground governor circuit 6, signal storage circuit 8 and signal measurement Acquisition Circuit 9,
The underground governor circuit 6 is connected to signal storage circuit 8 and signal measurement Acquisition Circuit 9 to realize the reception and control of signal
The output of signal, the signal measurement Acquisition Circuit 9 are electrically connected to wave detector to be responsible for the output ground of measurement three repacking waves of acquisition
Shake signal simultaneously passes to underground governor circuit 6, and the signal storage circuit 8 is responsible for the seismic signal of storage acquisition.
It wherein, also may include four core Bussing connectors 2, clock sync cap 3, double C battery sleeves 4, precision interval clock source 5 and letter
Number high-speed playback interface 7, the four cores Bussing connector 2 are responsible for carrying out communication transfer with the MWD mud-pulse information transmission system
The information of seismic signal is measured, the clock sync cap 3 is responsible for before going into the well by ground frequency sweep focus and downhole drill
It is synchronous to measure seismic detection device progress clock, double C battery sleeves 4 install batteries to power for each circuit, when described accurate
Clock source 5 is signal measurement Acquisition Circuit, underground governor circuit and signal storage circuit provide clock signal, and the signal high speed is returned
It puts interface 7 to be responsible for after pulling out of hole, the seismic signal information all measured is played back in ground surface high speed.Underground governor circuit 6 is responsible for electricity
Pond power consumption metering, supply voltage conversion, downhole instrument operating temperature measurement and with the MWD mud-pulse information transmission system
Carry out information exchange.
Referring to fig. 2, by the first hydraulic thrust therein by being illustrated for block 11, which is equipped in block 11
Wave detector 14 and pressure sensor 15, the wave detector 14 may be electrically connected to signal measurement Acquisition Circuit 9, the pressure sensor
15 are connected to underground governor circuit 6 by pressure measurement circuitry 22, to provide the output of entire pressure signal and control signal
Transmitting.
The hydraulic thrust includes backup oil cylinder 21, the plunger for not rotating protective case, being connected to hydraulic thrust by block by mechanism 10
Pump 18 and hydraulic cylinder 16, to realize the hydraulic-driven in drilling machine rotation, the center for not rotating protective case is equipped with one liang
End is respectively connected to the central axis of drill bit and drilling rod, and the central axis is rotatable to be attached the two, thus when drilling well is applied
In work, the drilling rod of rotation can drive drill bit to be crept into, and pass through a capacity eccentric bearing 19 between protective case and central axis without rotating
It is attached, so that realization does not rotate, protective case is opposing stationary in center axis rotation, and the protective case that do not rotate can connect
To the connecting rod of plunger pump 18, the plunger pump is respectively connected to hydraulic oil by the first non-return valve 17 and the second non-return valve 20
Cylinder 16 and backup oil cylinder 21, the front and back end of second non-return valve 20 passes through overflow valve 24 respectively and solenoid valve 23 is connected to
Hydraulic cylinder 16.
Realize that hydraulic thrust protrudes into stretching by block using eccentric setting this in the present invention, when underground governor circuit 6
After receiving down the seismic signal measuring command passed, hydraulic thrust is controlled by solenoid valve 23 by circuit system and leans on system drive hydraulic
Backup block makes it never rotate to stretch out in protective case and push the borehole wall to, ensure that hydraulic with wave detector 14 and corresponding measuring circuit
Good between backup block and borehole wall stratum to contact, this has important meaning for the seismic signal for receiving the focus on ground.
Its working principle is that when drilling rod band logical does not rotate the center axis rotation among protective case, since central axis uses
Bias design, therefore central axis can push the connecting rod of plunger pump 18 in a sliding manner when rotation, so that plunger pump 18
It moves back and forth under the synergy of pump inner spring and promotion connecting rod.Whenever eccentric center axis rotation one circle, plunger pump
18 with regard to once being moved back and forth.When the cavity space of plunger pump 18 becomes larger, it will formed vacuum suction effect, at this moment with column
The first non-return valve 17 that the chamber of plug pump 18 is connected is opened, and at this moment the hydraulic oil in hydraulic cylinder 16 will be sucked into plunger
Pump 18 it is intracavitary.When the cavity space of plunger pump 18 is compressed, the first non-return valve 17 will be closed due to pressure, and second
Non-return valve 20 since pressure will be opened, and at this time if circuit system receive instruction be carry out backup operation, circuit system
System will control solenoid valve 23, be at closed state.It is pushed away at this time by the hydraulic oil of the second non-return valve 20 by pressure indentation
By the intracavitary of oil cylinder 21.With the continuous rotation of eccentric central axis, plunger pump 18 will be continuously by hydraulic oil from hydraulic oil
It is drawn into that backup oil cylinder 21 is intracavitary in cylinder 16, the intracavitary pressure drop of backup oil cylinder 21 is gradually increasing, and band logical hydraulic stem will be hydraulic
Backup block pushes borehole wall stratum to.Pressure sensor 15 and pressure measurement circuitry 22 of the hydraulic thrust on block will be held in this process
Continuous monitoring hydraulic thrust is by the pressure change between block and the borehole wall, when backup pressure, which meets measurement, to be needed, pressure measurement circuitry 22
Surface energy source will be notified to excite earthquake, while the earthquake of underground by WMD mud information transfer channel by underground governor circuit 6
Detecting circuit start simultaneously at measure and record by borehole wall stratum be conducted through come seismic wave.Overflow valve 24 is used to control to push away
By the backup pressure value of block, when the pressure of entire hydraulic system is more than preset backup rated pressure value, overflow valve 24 will
Automatic opening is re-closing off after pressure is dropped to backup rated pressure value.The dynamic equilibrium for keeping backup pressure, works as circuit system
It receives after stopping backup instruction, the solenoid valve 23 of control is opened, so that the intracavitary hydraulic oil of backup oil cylinder 21 passes through electromagnetism
In 23 hydraulic return oil cylinder 16 of valve, the hydraulic stem of the backup oil cylinder 21 is equipped with spring to provide elastic recovery, by backup oil
The spring system of cylinder 21 retracts hydraulic thrust in protective case by block, completes the process of drilling earthquake wave measurement operation.
Referring to Fig. 3, it is shown that a preferred embodiment of wave detector in the present invention, the wave detector may include metal shell
25, elastic metallic diaphragm 26, quartz crystal 27, upper metal block pedestal 28, lower metal block pedestal 29 and driving source circuit board
30, the quartz crystal 27 is installed in rigid metal shell 25, and stretching is embedded in the one side of metal shell 25
The good elastic metallic diaphragm 26 of characteristic, the upper and lower ends of the quartz crystal 27 respectively connected good upper of rigid
Metal block pedestal 28 and lower metal block pedestal 29, the other end of the upper metal block pedestal 28 are connect with elastic metallic diaphragm 26,
The other end of the lower metal block pedestal 29 is connect with metal shell 25, to realize quartz crystal 27 and elastic metallic
The side of effective connection of diaphragm 26, the metal shell 25 is equipped with driving source circuit board 30, passes through two coaxial cables
31 are connected in quartz crystal 27, and the frequency sweep alternate electrical signal that can provide changeable frequency makes it to quartz crystal 27
It vibrates at different frequencies, and driving source circuit board 30 can detecte the coaxial cable of connection quartz crystal 27
Electric current on 31, by detecting that peak point current judges which frequency can be such that quartz crystal 27 occurs under swept frequency excitation
Covibration, and resonant frequency F1 is locked by driving source circuit board 30.One multiple twin coaxial cable 32 is connected to excitation source circuit
Plate 30, due to quartz crystal 27 when resonant its ac voltage signal that will generate identical frequency, the frequency
Ac voltage signal the outside of metal shell 1 can be drawn and is transmitted to by multiple twin coaxial cable 32, supervised by external measuring circuit
It surveys.The crust of the multiple twin coaxial cable 32 is connected to the surface of metal shell 25, is conducive to the interference for masking outside noise.
When the frequency sweep seismic signal caused by ground frequency sweep focus is along wave detector 14 of the earth-layer propagation to underground, coupled with stratum
Elastic metallic diaphragm 26 on good wave detector 14 can be vibrated with frequency sweep seismic signal, and elastic metallic diaphragm 26 also can be to inspection
Quartz crystal 27 in wave device 14 generates stretching and compression, the quartz crystal at this moment having reached resonance state are thin
Piece 27 will generate the change of vibration frequency, i.e., generate frequency displacement with earthquake change in signal strength.The frequency shift signal is coaxial by multiple twin
External measuring circuitry processing is given in the output of cable 32, so that it may measure the ground generated by surface energy source and through earth-layer propagation to underground
Shake signal.
As shown in Figure 4, it is shown that the vibration stimulus source of driving source circuit board 30 generates frequency sweep vibration voltage signal and carries out
The schematic diagram of detection acquisition, electric current AD acquisition unit are responsible for detecting on the coaxial cable 31 drawn from driving source circuit board 30
Current peak, to judge that quartz crystal 27 whether in resonance state, illustrates quartz crystal if electric current reaches peak value
Thin slice 27 has been in resonance state, and vibrational excitation source frequency at this moment is the resonant frequency F1 of quartz crystal 27, therefore
Controller should stop frequency sweep control, stablize vibration stimulus source on existing resonant frequency F1, become with earthquake signal strength
Relationship such as formula one between resonating quartz crystal slice-shaped variable Δ X caused by the departure freqency F2 and seismic signal of change:
In formula
F2-with earthquake change in signal strength departure freqency；
KX-quartz crystal coefficient of elasticity；
F1-quartz crystal resonant frequency；
D-quartz crystal diameter.
Quartz crystal reaches resonance in oscillating circuit, and may include a capacitor compensating circuit, by electricity referring to Fig. 5
Hold compensation circuit and solve resonant frequency shift caused by quartz crystal itself stray capacitance, improves signal-to-noise ratio.It is final to improve
The precision of quartz crystal detection seismic wave.
Wherein, the equivalent circuit of quartz crystal 27 is as shown in Figure 6.
When the oscillating voltage of certain frequency is loaded into quartz crystal 27, electricity can be equivalent in electrical characteristics
Feel the series connection of L1, capacitor C1 and resistance R1, and capacitor C0 just represents the stray capacitance in quartz crystal.And at this time due to
Bypass effect of the stray capacitance in the circuit Fig. 5, shunts being formed to the electric current for flowing through main road inductance L1, capacitor C1 and resistance R1
Effect.From following equation two and formula three:
In formula, I1 is the electric current for flowing through main road, and I0 is the electric current for flowing through bypass, therefore quartz crystal equivalent circuit
Signal-to-noise ratio can be indicated with I1/I0.Such as following equation:
By formula it can be seen that stray capacitance C0 is bigger, the signal-to-noise ratio that quartz crystal exports resonance signal is poorer.Cause
This needs to balance out stray capacitance C0 using compensatory device.The principle of compensation is compensating electric capacity circuit to be added, and adjust compensation electricity
Hold so that passing through the phase of the electric current of compensating electric capacity under resonant frequency and flowing through the current phase of stray capacitance C0 on the contrary, offsetting
Fall the influence of stray capacitance.
By the electric current AD acquisition unit of driving source circuit board 30 to 31 line of coaxial cable for being connected to quartz crystal 27
The electric current flowed through on core measures, while the control oscillation source of driving source circuit board 30 generates swept-frequency signal, when generation signal
Frequency of oscillation when quartz crystal 27 is resonated, the electric current flowed through on 31 core of coaxial cable reaches peak value, this
When driving source circuit board 30 control oscillation source stop frequency sweep, and keep resonant frequency F1 at this time, at this moment reach the stone of resonance
English crystal microchip reaches can be to the state that seismic signal measures.
When seismic signal reaches the elastic metallic diaphragm 26 on wave detector 14, the stone for having reached resonance state can be forced
English crystal microchip 27 occurs vibration frequency and deviates to form mixed frequency signal, this mixed frequency signal includes that quartz crystal is thin
The resonant frequency F1 of piece 27 and departure freqency F2 with earthquake change in signal strength, the i.e. frequency of the mixed signal are F1+F2.Partially
Frequency quantity F2 is moved to change with the intensity of seismic signal, it can should be changed with earthquake signal strength by corresponding circuit
Frequency F2 offset, which demodulates, to be come, and circuit demodulation principle is as shown in Figure 7.
With the mixing frequency of the changed frequency signal of earthquake signal strength and 27 resonance frequency signal of quartz crystal
Rate signal F1+F2 is exported by quartz crystal along multiple twin coaxial cable 32, and onto the input terminal VIN of the circuit, which exists
Mixing is switched by the resonance signal of quartz crystal in circuit, and is filtered by second-order low-pass filter, it can will be with earthquake
The changed frequency offset signals F2 of signal strength is separated.
According to the frequency offset signal F2 using frequency-voltage conversion circuit, can by the quartz crystal of resonance with
The frequency offset dress of seismic signal Strength Changes changes corresponding voltage signal V2 into.
When being exported from the quartz crystal of resonance with the changed frequency offset signal F2 of earthquake signal strength
By that will form undershoot pulse signal after the differential circuit that is made of R1 and C3, which will be to trigger set, after set
Trigger control and charge to capacitor CL, while trigger is disconnected also by the switching circuit of chip interior, so that passing through
Resistance R1 charges to capacitor C1, and when the voltage is greater than 2vcc/3, trigger resets, the current source of chip interior
No longer as capacitor CL charges, voltage on capacitor CL and input frequency signal at this time will establish the relationship such as formula, defeated in this way
Voltage signal out will just change with the frequency signal of input.When frequency signal is to be received by the quartz crystal to resonate
When the frequency offset signal F2 that seismic signal intensity effect generates, the voltage change signal V2 of the circuit output also be can reflect
The Strength Changes of seismic signal out are carrying out AD acquisition to voltage signal V2, can obtain reflection seismic signal Strength Changes
Digital signal D2, reach monitoring seismic signal purpose.
It can be seen that the present invention has the advantages that
1, it using quartz crystal, corresponding mechanical structure and corresponding peripheral circuit, is shaken in underground monitoring ground frequency sweep
The seismic wave of source excitation.It avoids and is designed using the coil and mems accelerometer of traditional geophone, seismic wave is measured
Responding range is big, applied widely.
2, seismic signal high resolution is conducive to efficiently measurement and is excited by ground frequency sweep focus and along earth-layer propagation to well
Under frequency sweep seismic signal.
It is readily apparent that above description and record is only illustrated in the disclosure being not intended to be limiting of the invention
Appearance, application or use.Although describing and being described in the accompanying drawings embodiment in embodiment, the present invention is not limited
Be described as by attached drawing example and in embodiment it is now recognized that optimal mode to implement the particular case of the teachings of the present invention
Son, the scope of the present invention will include any embodiment for falling into the description and appended claims of front.
Claims (7)
1. a kind of nonpetroleum measurement while drilling seismic detection device, including drill collar install ontology and are set to drill collar installation originally
The hydraulic thrust of body leans on system and signal detection system, it is characterised in that:
The hydraulic thrust includes that hydraulic thrust leans on mechanism and at least one hydraulic thrust to lean on block by system, and the hydraulic thrust connects by mechanism
Hydraulic thrust is connected to by block to realize hydraulic thrust by pressing or disengaging of the block to the borehole wall and/or stratum, the hydraulic thrust is equipped with by block
Wave detector, to be detected to seismic wave,
The wave detector includes metal shell, quartz crystal and driving source circuit board, and the quartz crystal is installed on
In the metal shell of rigidity, the side of the metal shell is equipped with driving source circuit board, passes through two coaxial cable connections
Onto quartz crystal, the frequency sweep alternate electrical signal that can provide changeable frequency makes it in different frequencies to quartz crystal
It is vibrated under rate；
The vibration stimulus source of the driving source circuit board generates frequency sweep vibration voltage signal and carries out detection acquisition, and an electric current AD is adopted
Collect the current peak on unit detection coaxial cable, to judge whether quartz crystal is in resonance state, if electric current reaches
Then illustrate that quartz crystal has been in resonance state to peak value, vibrational excitation source frequency at this moment is quartz crystal
Resonant frequency, it should stop frequency sweep control, stablize vibration stimulus source on existing resonant frequency, become with earthquake signal strength
Relationship such as following formula between resonating quartz crystal slice-shaped variable Δ X caused by the departure freqency and seismic signal of change:
In formula
F2-with earthquake change in signal strength departure freqency；
KX-quartz crystal coefficient of elasticity；
F1-quartz crystal resonant frequency；
D-quartz crystal diameter.
2. nonpetroleum measurement while drilling seismic detection device as described in claim 1, it is characterised in that: the wave detector also wraps
Diaphragm containing elastic metallic, upper metal block pedestal and lower metal block pedestal are embedded in elastic metallic diaphragm in the one side of metal shell,
The upper and lower ends of the quartz crystal are separately connected metal block pedestal and lower metal block pedestal, the upper metal block pedestal
The other end connect with elastic metallic diaphragm, the other end of the lower metal block pedestal is connect with metal shell.
3. nonpetroleum measurement while drilling seismic detection device as claimed in claim 2, it is characterised in that: the signal detection system
System includes underground governor circuit, signal storage circuit and signal measurement Acquisition Circuit, and the underground governor circuit is connected to signal
Storage circuit and signal measurement Acquisition Circuit are to realize the reception of signal and control the output of signal, the signal measurement acquisition electricity
Road is electrically connected to wave detector with the output seismic signal of three repacking waves of responsible measurement acquisition and passes to underground governor circuit, described
Signal storage circuit is responsible for the seismic signal of storage acquisition.
4. nonpetroleum measurement while drilling seismic detection device as described in claim 1, it is characterised in that: the hydraulic thrust leans on block
It is inside additionally provided with pressure sensor, the hydraulic thrust includes the backup oil cylinder for being connected to hydraulic thrust and leaning on block by mechanism, the backup oil
Cylinder is connected to hydraulic thrust by block to realize hydraulic-driven.
5. nonpetroleum measurement while drilling seismic detection device as claimed in claim 4, it is characterised in that: the hydraulic thrust leans on machine
Structure also includes not rotate protective case, and the center for not rotating protective case is equipped with a both ends and is respectively connected in drill bit and drilling rod
Mandrel, the central axis is rotatable to be attached the two, does not rotate between protective case and central axis through a capacity eccentric bearing
It is attached.
6. nonpetroleum measurement while drilling seismic detection device as claimed in claim 5, it is characterised in that: the hydraulic thrust leans on machine
Structure also includes plunger pump and hydraulic cylinder, the connecting rod for not rotating protective case and being connected to plunger pump, and the plunger pump passes through
First non-return valve and the second non-return valve are respectively connected to hydraulic cylinder and backup oil cylinder, the front and back of second non-return valve
End is connected to hydraulic cylinder by overflow valve and solenoid valve respectively.
7. nonpetroleum measurement while drilling seismic detection device as described in claim 1, it is characterised in that: include a capacitance compensation
Circuit solves resonant frequency shift caused by quartz crystal itself stray capacitance as capacitor compensating circuit, improves signal-to-noise ratio,
Improve the precision of quartz crystal detection seismic wave.
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| CN110244349B (en) * | 2019-07-01 | 2021-01-26 | 中国铁建重工集团股份有限公司 | In-hole detector |
| CN117031466B (en) * | 2023-10-09 | 2023-12-08 | 乐山师范学院 | Device and method for monitoring mountain tourist attraction based on radar |
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