CN106054241A - Novel petroleum measurement-while-drilling seismometer - Google Patents
Novel petroleum measurement-while-drilling seismometer Download PDFInfo
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- CN106054241A CN106054241A CN201610408933.3A CN201610408933A CN106054241A CN 106054241 A CN106054241 A CN 106054241A CN 201610408933 A CN201610408933 A CN 201610408933A CN 106054241 A CN106054241 A CN 106054241A
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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
Provided is a novel petroleum measurement-while-drilling seismometer, which comprises a drill collar installation body, a hydraulic pusher system and a signal detection system, wherein the hydraulic pusher system and the signal detection system are arranged in the drill collar installation body. The hydraulic pusher system comprises a hydraulic pusher mechanism and at least one hydraulic pusher block. Each hydraulic pusher block is provided with a wave detector for detecting seismic waves. The wave detector comprises a metal housing, a quartz crystal sheet and an excitation source circuit board. The quartz crystal sheet is arranged in the rigid metal housing; and one side of the metal housing is provided with the excitation source circuit board, which is connected to the quartz crystal sheet through two coaxial cables and can provide frequency-variable frequency sweep alternating electric signals to the quartz crystal sheet to enable the quartz crystal sheet to vibrate under different frequencies. The novel petroleum measurement-while-drilling seismometer is large in dynamic response range for seismic wave measurement and high in seismic signal resolution, and facilitates efficiently measuring sweep frequency seismic signals triggered by a ground sweep frequency earthquake source and transmitted down to the hole along the stratum.
Description
Technical field
The present invention relates to the technical field of oil measurement while drilling seismic survey, particularly relate to a kind of nonpetroleum measurement while drilling
Seismic detection device.
Background technology
The coil of tradition geophone and mems accelerometer design, measure responding range to seismic wave little, ground
Shake signal resolution is inadequate, is unfavorable for efficiently measuring and is excited by ground frequency sweep focus and along earth-layer propagation to the frequency sweep of down-hole
Shake signal.
To this end, the designer of the present invention is because drawbacks described above, by concentrating on studies and designing, comprehensively it is engaged in for many years for a long time
The experience of related industry and achievement, research design goes out a kind of nonpetroleum measurement while drilling seismic detection device, to overcome above-mentioned lacking
Fall into.
Summary of the invention
It is an object of the invention to provide a kind of nonpetroleum measurement while drilling seismic detection device and can solve prior art
Defect, measures responding range to seismic wave big, and seismic signal resolution is high, is conducive to efficiently measuring by ground frequency sweep focus
Excited and along earth-layer propagation to the frequency sweep seismic signal of down-hole.
For solving the problems referred to above, the invention discloses a kind of nonpetroleum measurement while drilling seismic detection device, including drill collar
Body is installed and is arranged at the hydraulic thrust of drill collar installation body by system and signal detection system, it is characterised in that:
Described hydraulic thrust comprises hydraulic thrust by system and leans on machine by mechanism and at least one hydraulic thrust by block, described hydraulic thrust
Structure is connected to hydraulic thrust and leans on block be pressed against the borehole wall and/or stratum or depart from by block to realize hydraulic thrust, and described hydraulic thrust leans on block
It is provided with cymoscope, so that seismic wave is detected,
Described cymoscope comprises metal shell, quartz crystal and driving source circuit board, and described quartz crystal is pacified
Being loaded in the metal shell of rigidity, the side of described metal shell is provided with driving source circuit board, and it passes through two coaxial cables
Being connected in quartz crystal, it is provided that the frequency sweep alternate electrical signal of changeable frequency makes it in difference to quartz crystal
Frequency under vibrate.
Wherein: described cymoscope also comprises elastic metallic diaphragm, upper metal derby pedestal and lower metal derby pedestal, outside metal
In the one side of shell embed elastic metallic diaphragm, the two ends up and down of described quartz crystal connect respectively metal derby pedestal and under
Metal derby pedestal, the other end of described upper metal derby pedestal is connected with elastic metallic diaphragm, another of described lower metal derby pedestal
End is connected with metal shell.
Wherein: described signal detection system comprises down-hole governor circuit, signal storage circuit and signal measurement Acquisition Circuit,
Described down-hole governor circuit is connected to signal storage circuit and signal measurement Acquisition Circuit to realize the reception of signal and to control letter
Number output, described signals collecting measuring circuit be electrically connected to cymoscope with responsible measure gather three repacking ripples output earthquake letter
Number and pass to down-hole governor circuit, described signal storage circuit be responsible for storage gather seismic signal.
Wherein: described hydraulic thrust is by being additionally provided with pressure transducer in block, and described hydraulic thrust comprises by mechanism and is connected to hydraulic pressure
The backup oil cylinder of backup block, described backup oil cylinder is connected to hydraulic thrust by block to realize hydraulic-driven.
Wherein: described hydraulic thrust also comprises by mechanism not rotate protects set, and the described center not rotating protection set is provided with one
Two ends are respectively connecting to the central shaft of drill bit and drilling rod, and described central shaft is rotatable to be attached both, does not rotate protection
It is attached by a capacity eccentric bearing between set and central shaft.
Wherein: described hydraulic thrust also comprises plunger displacement pump and hydraulic jack by mechanism, the described protection set that do not rotates is connected to
The connecting rod of plunger displacement pump, described plunger displacement pump is respectively connecting to hydraulic jack and backup by the first non-return valve and the second non-return valve
Oil cylinder, holds before and after described second non-return valve and is connected to hydraulic jack by overflow valve and electromagnetic valve respectively.
Wherein: the vibration stimulus source of described driving source circuit board produces frequency sweep vibration voltage signal and carries out detection collection,
Current peak on one electric current AD collecting unit detection coaxial cable, judges whether quartz crystal diaphragm is in resonance state,
If electric current reaches peak value, illustrate quartz crystal already at resonance state, vibrational excitation source frequency at this moment be quartz
The resonant frequency of crystal microchip, it should stop frequency sweep and control, makes vibration stimulus source stable on existing resonant frequency, with earthquake
Relation between the resonating quartz crystal slice-shaped variable Δ X that the departure freqency of change in signal strength and seismic signal cause is as public
Formula one:
In formula
F2 is with the departure freqency of earthquake change in signal strength；
The coefficient of elasticity of KX quartz crystal；
The resonant frequency of F1 quartz crystal；
The diameter of D quartz crystal.
Wherein: comprise a capacitor compensating circuit, capacitor compensating circuit solve quartz crystal self stray capacitance to draw
The resonant frequency shift risen, improves signal to noise ratio, improves the precision of quartz crystal detection seismic wave.
By said structure, the nonpetroleum measurement while drilling seismic detection device of the present invention has the effect that
1, use quartz crystal, corresponding frame for movement and corresponding peripheral circuit, shake in underground monitoring ground frequency sweep
The seismic wave of source excitation.Avoid coil and the mems accelerometer design using tradition geophone, seismic wave is measured
Responding range is big, applied widely.
2, seismic signal resolution is high, is conducive to efficiently measuring being excited and along earth-layer propagation to well by ground frequency sweep focus
Under frequency sweep seismic signal.
The detailed content of the present invention can be obtained by explanation described later and institute's accompanying drawing.
Accompanying drawing explanation
Fig. 1 shows the structural representation of the nonpetroleum measurement while drilling seismic detection device of the present invention.
Fig. 2 shows that in the present invention, hydraulic thrust is by the structural representation of system.
Fig. 3 shows the structural representation of cymoscope in the present invention.
Fig. 4 shows that the vibration stimulus source of driving source circuit board of the present invention produces frequency sweep vibration voltage signal and carries out detection
The schematic diagram gathered.
Fig. 5 shows that in the present invention, quartz crystal is at the connection circuit of oscillating circuit.
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 medium frequency voltage conversion circuit of the present invention.
Reference:
Drill collar installs body 1, four core Bussing connector 2, clock sync cap 3, double C battery sleeve 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 leans on block 13, cymoscope 14, pressure transducer 15, hydraulic pressure by block the 11, second hydraulic thrust by block the 12, the 3rd hydraulic thrust
Oil cylinder the 16, first non-return valve 17, plunger displacement pump 18, capacity eccentric bearing the 19, second non-return valve 20, backup oil cylinder 21, pressure measxurement
Circuit 22, electromagnetic valve 23, overflow valve 24, metal shell 25, elastic metallic diaphragm 26, quartz crystal 27, upper metal derby base
Seat 28, lower metal derby pedestal 29, driving source circuit board 30, coaxial cable 31, multiple twin coaxial cable 32.
Detailed description of the invention
See Fig. 1, it is shown that the nonpetroleum measurement while drilling seismic detection device of the present invention.
Described nonpetroleum measurement while drilling seismic detection device includes that drill collar is installed body 1 and is arranged at drill collar installation
The hydraulic thrust of body 1 leans on system and signal detection system, and described hydraulic thrust comprises hydraulic thrust by system and leans on mechanism 10 and at least
One hydraulic thrust by block, described hydraulic thrust by mechanism 10 be connected to hydraulic thrust by block with realize hydraulic thrust by block to the borehole wall and/or
Being pressed against or depart from of stratum, described hydraulic thrust is provided with cymoscope by block, to detect seismic wave.
Seeing Fig. 1, described hydraulic thrust can comprise the first hydraulic thrust by block the 11, second hydraulic thrust by block 12 and the 3rd liquid by block
Pressure backup block 13, and comprises cymoscope respectively, to provide X to, Y-direction and the rectified signal collection of Z-direction, is collectively forming three repacking
Wave energy.
Described signal detection system can comprise down-hole governor circuit 6, signal storage circuit 8 and signal measurement Acquisition Circuit 9,
Described down-hole governor circuit 6 is connected to signal storage circuit 8 and signal measurement Acquisition Circuit 9 to realize reception and the control of signal
The output of signal processed, described signals collecting measuring circuit 9 is electrically connected to cymoscope with the responsible output measuring collection three repacking ripples
Seismic signal also passes to down-hole governor circuit 6, and described signal storage circuit 8 is responsible for the seismic signal that storage gathers.
Wherein, four core Bussing connectors 2, clock sync cap 3, double C battery sleeve 4, precision interval clock source 5 and letter can also be comprised
Number high-speed playback interface 7, described four core Bussing connectors 4 are responsible for carrying out communication transfer with MWD mud-pulse information transmission system
Measuring the information of seismic signal, described time synchronized interface 3 is responsible for before going into the well by ground frequency sweep focus and downhole drill
Measuring seismic detection device and carry out clock synchronization, described pair of C battery sleeve 4 is installed battery and is thought that each circuit is powered, during described precision
Clock source 5 is measured Acquisition Circuit, down-hole governor circuit and signal storage circuit for seismic signal and is provided clock signal, and described signal is high
After speed playback interface 7 is responsible for pulling out of hole, all measure, in ground surface high speed playback, the seismic signal information arrived.Down-hole governor circuit 6 is negative
Duty battery power consumption metering, supply voltage conversion, downhole instrument operating temperature are measured and with the transmission of MWD mud-pulse information are
It is mutual that system carries out information.
Seeing Fig. 2, illustrate as a example by the first hydraulic thrust therein is by block 11, this first hydraulic thrust is provided with by block 11
Cymoscope 14 and pressure transducer 15, described cymoscope 14 may be electrically connected to signal measurement Acquisition Circuit 9, described pressure transducer
15 are connected to down-hole governor circuit 6 by pressure measurement circuitry 22, to provide the output of whole pressure signal and control signal
Transmission.
Described hydraulic thrust comprises by mechanism 10 and does not rotates protection set, is connected to hydraulic thrust by the backup oil cylinder 21 of block, plunger
Pump 18 and hydraulic jack 16, for realizing the hydraulic-driven during rig rotates, the described center not rotating protection set is provided with one or two
End is respectively connecting to the central shaft of drill bit and drilling rod, and described central shaft is rotatable to be attached both, thus when drilling well is executed
In work, the drilling rod of rotation can drive drill bit to creep into, and does not rotate between protection set and central shaft by a capacity eccentric bearing 19
Being attached, thus realize not rotating the geo-stationary that protection is enclosed within during central shaft rotates, the described protection set that do not rotates can connect
To the connecting rod of plunger displacement pump 18, described plunger displacement pump is respectively connecting to hydraulic oil by the first non-return valve 17 and the second non-return valve 20
Cylinder 16 and backup oil cylinder 21, hold before and after described second non-return valve 2 and be connected to liquid by overflow valve 24 and electromagnetic valve 23 respectively
Compressing cylinder 16.
Arranging of this bias in the present invention is utilized to realize hydraulic thrust and stretch out, when down-hole main control board by stretching into of block
After 6 receive down the seismic signal measuring command passed, Circuits System control hydraulic thrust by system drive liquid by electromagnetic valve 23
Pressure backup block makes it never rotate in protection set to stretch out and push the borehole wall to, it is ensured that with cymoscope 14 and the liquid of corresponding measuring circuit
Good contacting between pressure backup block and borehole wall stratum, this has important meaning for the seismic signal receiving the focus on ground
Justice.
Its operation principle is when drilling rod band leads to the central shaft rotation not rotated in the middle of protection set, owing to central shaft have employed
Eccentric design, therefore central shaft can promote the connecting rod of plunger displacement pump 18 rotating when in a sliding manner so that plunger displacement pump 18
Move back and forth under the synergy of pump inner spring and promotion connecting rod.When eccentric central shaft rotation is turned around, plunger displacement pump
18 the most once move back and forth.When the cavity space of plunger displacement pump 18 becomes big, it will form vacuum draw effect, at this moment with post
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 jack 16 will be sucked into plunger
The intracavity of pump 18.When the cavity space of plunger displacement pump 18 is compressed, the first non-return valve 17 will cut out due to pressure, and second is single
To be opened due to pressure to ball valve 20, and if now Circuits System receive instruction be by backup operation, Circuits System
Electromagnetic valve 23 will be controlled so that it is be closed.Hydraulic oil now by the second non-return valve 20 is pressed into backup by pressure
The intracavity of oil cylinder 21.Along with the continuous rotation of eccentric central shaft, plunger displacement pump 18 will continuously by hydraulic oil from hydraulic jack
Being drawn into backup oil cylinder 21 intracavity in 16, the pressure drop of backup oil cylinder 21 intracavity is gradually increasing, and carries logical hydraulic stem by hydraulic thrust
Borehole wall stratum is pushed to by block.Hydraulic thrust will continue by the pressure transducer 15 on block and pressure measurement circuitry 22 in this process
Monitoring hydraulic thrust is by the pressure change between block and the borehole wall, and when backup pressure meets measurement needs, pressure measurement circuitry 22 is led to
Cross down-hole governor circuit 6 and will excite earthquake by WMD mud information transfer channel notice surface energy source, the earthquake inspection of down-hole simultaneously
Wave circuit starts simultaneously to measure and record and conducts, by borehole wall stratum, the seismic wave come.Overflow valve 24 is used for controlling backup
The backup force value of block, when the pressure of whole hydraulic system exceedes default backup rated pressure value, overflow valve 24 will be certainly
Dynamic unlatching is re-closing off after pressure is dropped to backup rated pressure value.Keep the dynamic equilibrium of backup pressure, when Circuits System connects
After receiving stopping backup instruction, the electromagnetic valve 23 of control is opened so that the hydraulic oil of backup oil cylinder 21 intracavity passes through electromagnetic valve
In 23 hydraulic return oil cylinders 16, the hydraulic stem of described backup oil cylinder 21 is provided with spring to provide elastic recovery, relies on backup oil cylinder
Hydraulic thrust is retracted in protection set by the spring system of 21 by block, completes the process of drilling earthquake wave measurement operation.
See Fig. 3, it is shown that a preferred embodiment of cymoscope in the present invention, described cymoscope can comprise metal shell
25, elastic metallic diaphragm 26, quartz crystal 27, upper metal derby pedestal 28, lower metal derby pedestal 29 and driving source circuit board
30, described quartz crystal 27 is installed in the metal shell 25 of rigidity, embedded in stretching in the one side of metal shell 25
The elastic metallic diaphragm 26 that characteristic is good, it is good that the two ends up and down of described quartz crystal 27 respectively connected rigid
Upper metal derby pedestal 28 and lower metal derby pedestal 29, the other end of described upper metal derby pedestal 28 is with elastic metallic diaphragm 26 even
Connecing, the other end of described lower metal derby pedestal 29 is connected with metal shell 25, thus realizes quartz crystal 27 and elasticity gold
Belonging to effective connection of diaphragm 26, the side of described metal shell 25 is provided with driving source circuit board 30, and it passes through two coaxial electrical
Cable 31 is connected in quartz crystal 27, and it is provided that the frequency sweep alternate electrical signal of changeable frequency makes to quartz crystal 27
It vibrates at different frequencies, and driving source circuit board 30 can detect the coaxial electrical connecting quartz crystal 27
Electric current on cable 31, by detecting that peak point current judges which frequency can make quartz crystal 27 under swept frequency excitation
Raw covibration, and locked resonant frequency F1 by driving source circuit board 30.One multiple twin coaxial cable 32 is connected to driving source electricity
Road plate 30, due to quartz crystal 27, when resonant, it will produce the ac voltage signal of same frequency, therefore this frequency
The ac voltage signal of rate can be drawn by multiple twin coaxial cable 32 and be delivered to outside metal shell 1, by outside measuring circuit
Monitoring.The crust of described multiple twin coaxial cable 32 is connected to the surface of metal shell 1, is conducive to masking the dry of outside noise
Disturb.When the frequency sweep seismic signal caused by ground frequency sweep focus is along earth-layer propagation to the cymoscope 14 of down-hole, with stratum coupling
Closing the elastic metallic diaphragm 26 on good cymoscope 14 to vibrate with frequency sweep seismic signal, elastic metallic diaphragm 26 also can be right
Quartz crystal 27 in cymoscope 14 produces stretching and compression, has reached the quartz crystal film of resonance state
Sheet 27 will produce the change of frequency of vibration, i.e. produces frequency displacement with earthquake change in signal strength.This frequency shift signal is coaxial by multiple twin
Cable 32 exports and processes to external measuring circuitry, it is possible to measures and is produced by surface energy source and through the ground of earth-layer propagation to down-hole
Shake signal.
As shown in Figure 4, it is shown that the vibration stimulus source of driving source circuit board 30 produces frequency sweep vibration voltage signal and carries out
The schematic diagram that detection gathers, electric current AD collecting unit is responsible on the coaxial cable 7 that detection is drawn from driving source circuit board 30
Current peak, judges whether quartz crystal diaphragm 27 is in resonance state, if electric current reaches peak value, quartz crystal is described
Thin slice 27 already at resonance state, the resonant frequency F1 that vibrational excitation source frequency is quartz crystal 27 at this moment, therefore
Controller 10 should stop frequency sweep control, makes vibration stimulus source 8 stable on existing resonant frequency F1, with earthquake signal intensity
Relation such as formula one between the resonating quartz crystal slice-shaped variable Δ X that the departure freqency F2 of change and seismic signal cause:
In formula
F2 is with the departure freqency of earthquake change in signal strength；
The coefficient of elasticity of KX quartz crystal；
The resonant frequency of F1 quartz crystal；
The diameter of D quartz crystal.
Quartz crystal reaches resonance in oscillating circuit, and sees Fig. 5, can comprise a capacitor compensating circuit, by electricity
Hold and compensate the resonant frequency shift that circuit solution quartz crystal self stray capacitance causes, improve signal to noise ratio.Final raising
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 in quartz crystal 27, it can be equivalent to electricity in electrical characteristics
Sense L1, electric capacity C1 and the series connection of resistance R1, and electric capacity C0 just represents the stray capacitance in quartz crystal.And now due to
Stray capacitance bypass effect in Fig. 5 loop, will form shunting to the electric current flowing through main road inductance L1, electric capacity C1 and resistance R1
Effect.From following equation two and formula three:
In formula, I1 is the electric current flowing through main road, I0 is the electric current flowing through bypass, therefore quartz crystal equivalent circuit
Signal to noise ratio can represent with I1/I0.Such as following equation:
Be can be seen that stray capacitance C0 is the biggest by formula, the signal to noise ratio of quartz crystal output resonance signal is the poorest.Cause
This needs to use compensatory device to balance out stray capacitance C0.The principle compensated is to add to compensate capacitor loop, and regulates compensation electricity
Appearance makes under resonant frequency contrary with the current phase flowing through stray capacitance C0 by compensating the phase place of the electric current of electric capacity, offsets
Fall the impact of stray capacitance.
By the electric current AD collecting unit of driving source circuit board 30 coaxial cable 31 line to being connected to quartz crystal 27
The electric current flow through on core measures, and the control oscillation source of driving source circuit board 30 produces swept-frequency signal simultaneously, when producing signal
Frequency of oscillation make quartz crystal 27 occur resonance time, the electric current flow through on coaxial cable 31 core reaches peak value, this
Time driving source circuit board 30 control oscillation source stop frequency sweep, and keep resonant frequency F1 now, at this moment arrive the stone of resonance
English crystal microchip reaches the state that can measure seismic signal.
When seismic signal arrives the elastic metallic diaphragm 26 on cymoscope 14, the stone having reached resonance state can be forced
English crystal microchip 27 occurs frequency of vibration skew to form hybrid frequency signal, and it is thin that this hybrid frequency signal includes quartz crystal
The resonant frequency F1 of the sheet 27 and departure freqency F2 with earthquake change in signal strength, i.e. the frequency of this mixed signal is F1+F2.Partially
Move frequency quantity F2 to change with the intensity of seismic signal, corresponding circuit this can be changed with earthquake signal intensity
Frequency F2 skew demodulate out, circuit demodulation principle is as shown in Figure 7.
The mixing frequency of the frequency signal changed with earthquake signal intensity and quartz crystal 27 resonance frequency signal
Rate signal F1+F2 is exported along multiple twin coaxial cable 32 by quartz crystal, and on the input VIN of this circuit, this signal exists
Circuit is switched mixing by the resonance signal of quartz crystal, and filters through second-order low-pass filter, can be by with earthquake
Frequency offset signals F2 that signal intensity changes is separated.
According to this frequency offset signal F2 again through 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.
As the frequency offset signal F2 changed with earthquake signal intensity from the quartz crystal output of resonance
By after the peaker that is made up of R1 and C3 will be formed undershoot pulse signal, this signal will be to trigger set, after set
Trigger control be charged to electric capacity CL, simultaneously trigger also by chip internal on-off circuit disconnect so that pass through
Resistance R1 is charged to electric capacity C1, and when this voltage is more than 2vcc/3, trigger resets, and the current source of chip internal is not
Charging as electric capacity CL, the voltage on electric capacity CL and input frequency signal now will be set up such as formula againRelation, so output voltage signal just by with input frequency signal
Change.When frequency signal is to be received, by the quartz crystal resonated, the frequency offset that seismic signal intensity effect produces
During signal F2, the voltage change signal V2 of this circuit output can also reflect the Strength Changes of seismic signal, to this voltage
Signal V2 carries out AD collection, just can obtain reflecting the digital signal D2 of seismic signal Strength Changes, arrive monitoring seismic signal
Purpose.
As can be seen here, it is an advantage of the current invention that:
1, use quartz crystal, corresponding frame for movement and corresponding peripheral circuit, shake in underground monitoring ground frequency sweep
The seismic wave of source excitation.Avoid coil and the mems accelerometer design using tradition geophone, seismic wave is measured
Responding range is big, applied widely.
2, seismic signal resolution is high, is conducive to efficiently measuring being excited and along earth-layer propagation to well by ground frequency sweep focus
Under frequency sweep seismic signal.
It is readily apparent that above description and record are only to illustrate rather than in order to limit in disclosure of the invention
Hold, apply or use.Although describing and be described in the drawings embodiment the most in an embodiment, but the present invention being not intended to
By accompanying drawing example and be described as in an embodiment it is now recognized that optimal mode with implement the teachings of the present invention particular case
Son, the scope of the present invention will include any embodiment falling into description and appended claims above.
Claims (8)
1. a nonpetroleum measurement while drilling seismic detection device, installs body including drill collar and is arranged at drill collar installation originally
The hydraulic thrust of body leans on system and signal detection system, it is characterised in that:
Described hydraulic thrust comprises hydraulic thrust by system and connects by mechanism by block, described hydraulic thrust by mechanism and at least one hydraulic thrust
Being connected to hydraulic thrust leans on block be pressed against the borehole wall and/or stratum or depart from by block to realize hydraulic thrust, and described hydraulic thrust is provided with by block
Cymoscope, so that seismic wave is detected,
Described cymoscope comprises metal shell, quartz crystal and driving source circuit board, and described quartz crystal is installed on
In the metal shell of rigidity, the side of described metal shell is provided with driving source circuit board, and it is connected by two coaxial cables
In quartz crystal, it is provided that the frequency sweep alternate electrical signal of changeable frequency makes it at different frequencies to quartz crystal
Vibrate under rate.
2. nonpetroleum measurement while drilling seismic detection device as claimed in claim 1, it is characterised in that: described cymoscope also wraps
Containing elastic metallic diaphragm, upper metal derby pedestal and lower metal derby pedestal, the one side of metal shell embeds elastic metallic diaphragm,
The two ends up and down of described quartz crystal connect metal derby pedestal and lower metal derby pedestal, described upper metal derby pedestal respectively
The other end be connected with elastic metallic diaphragm, the other end of described lower metal derby pedestal is connected with metal shell.
3. nonpetroleum measurement while drilling seismic detection device as claimed in claim 2, it is characterised in that: described signal detection system
System comprises down-hole governor circuit, signal storage circuit and signal measurement Acquisition Circuit, and described down-hole governor circuit is connected to signal
Storage circuit and the output of signal measurement Acquisition Circuit reception and control signal to realize signal, described signals collecting measures electricity
Road is electrically connected to cymoscope and gathers the output seismic signal of three repacking ripples with responsible measurement and pass to down-hole governor circuit, described
Signal storage circuit is responsible for the seismic signal that storage gathers.
4. nonpetroleum measurement while drilling seismic detection device as claimed in claim 1, it is characterised in that: described hydraulic thrust leans on block
Inside being additionally provided with pressure transducer, described hydraulic thrust comprises the backup oil cylinder being connected to hydraulic thrust by block, described backup oil by mechanism
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: described hydraulic thrust leans on machine
Structure also comprises not rotate protects set, and the described center not rotating protection set is provided with two ends and is respectively connecting in drill bit and drilling rod
Mandrel, described central shaft is rotatable to be attached both, does not rotate between protection set and central shaft by 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: described hydraulic thrust leans on machine
Structure also comprises plunger displacement pump and hydraulic jack, and the described protection set that do not rotates is connected to the connecting rod of plunger displacement pump, and described plunger displacement pump passes through
First non-return valve and the second non-return valve are respectively connecting to hydraulic jack and backup oil cylinder, before and after described second non-return valve
End is connected to hydraulic jack by overflow valve and electromagnetic valve respectively.
7. nonpetroleum measurement while drilling seismic detection device as claimed in claim 1, it is characterised in that: described driving source circuit
The vibration stimulus source of plate produces frequency sweep vibration voltage signal and carries out detection collection, an electric current AD collecting unit detection coaxial cable
On current peak, judge whether quartz crystal diaphragm is in resonance state, if electric current reaches peak value, quartz-crystal be described
Body thin slice is already at resonance state, the resonant frequency that vibrational excitation source frequency is quartz crystal at this moment, it should stop
Frequency sweep controls, and makes vibration stimulus source stable on existing resonant frequency, with departure freqency and the ground of earthquake change in signal strength
Relation such as formula one between the resonating quartz crystal slice-shaped variable Δ X that shake signal causes:
In formula
F2 is with the departure freqency of earthquake change in signal strength；
The coefficient of elasticity of KX quartz crystal；
The resonant frequency of F1 quartz crystal；
The diameter of D quartz crystal.
8. nonpetroleum measurement while drilling seismic detection device as claimed in claim 7, it is characterised in that: comprise a capacitance compensation
Circuit, is solved, by capacitor compensating circuit, the resonant frequency shift that quartz crystal self stray capacitance causes, and improves signal to noise ratio,
Improve the precision of quartz crystal detection seismic wave.
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| CN201610408933.3A CN106054241B (en) | 2016-06-12 | 2016-06-12 | Nonpetroleum measurement while drilling seismic detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610408933.3A CN106054241B (en) | 2016-06-12 | 2016-06-12 | Nonpetroleum measurement while drilling seismic detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110244349A (en) * | 2019-07-01 | 2019-09-17 | 中国铁建重工集团股份有限公司 | Wave detector in a kind of hole |
| CN117031466A (en) * | 2023-10-09 | 2023-11-10 | 乐山师范学院 | Device and method for monitoring mountain tourist attraction based on radar |
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| CN110244349A (en) * | 2019-07-01 | 2019-09-17 | 中国铁建重工集团股份有限公司 | Wave detector in a kind of hole |
| 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 |
| CN117031466A (en) * | 2023-10-09 | 2023-11-10 | 乐山师范学院 | Device and method for monitoring mountain tourist attraction based on radar |
| 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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| CN106054241B (en) | 2019-01-22 |
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