CN205977202U - Oil well dynamic fluid level tests self -adaptive circuit - Google Patents
Oil well dynamic fluid level tests self -adaptive circuit Download PDFInfo
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- CN205977202U CN205977202U CN201620935691.9U CN201620935691U CN205977202U CN 205977202 U CN205977202 U CN 205977202U CN 201620935691 U CN201620935691 U CN 201620935691U CN 205977202 U CN205977202 U CN 205977202U
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Abstract
The utility model provides an oil well dynamic fluid level tests self -adaptive circuit, U1's input anode is even put respectively to signal generator V1's positive pole to fortune behind resistance R0 and electric capacity C1, U1's input negative terminal is even put to signal generator V1's negative pole to fortune through the low pass filter circuit of electric capacity C2 and resistance R1 constitution, high frequency signal rejects, the output that U1 was put to fortune is even to transporting the amplifier circuit of putting U2 and constituteing, the output that U2 was put to fortune links to MOS pipe Q1's the S utmost point, U1's output is even put to MOS pipe Q1's the G utmost point to fortune behind resistance R3 and diode D1, D extremely links the input negative terminal of putting U1 to fortune, diode D1's positive pole and fortune are put the U1 output and are linked to each other. For furthest improves oil well yield, reduce the exploitation energy consumption, realize the test of dynamic liquid level, guarantee the accuracy of oil well liquid level test to realize real -time liquid level and monitor the developments exploitation that combines together with beam -pumping unit frequency conversion control technique. The utility model belongs to the field is measured to the oil well.
Description
Technical field
This utility model is related to a kind of adaptive circuit, belongs to well logging field.
Background technology
The oil well of China mostly is hyposmosis, low yield energy, and most of oil field will lean on oil pumper that oil is elevated from stratum, with
It is the reality in China oil field that electricity is changed oil.More than 100,000, motor total installation of generating capacity reaches for the use of domestic oil pumper
3500MW (rated power that oil-field oil pumper is commonly used is in 15KW～90KW), annual power consumption is more than 10,000,000,000 KWh, the operation of oil pumper
Efficiency is averagely only 25.96% in China, often the operational efficiency of lifting 1%, and year, energy conservation potential was more than hundred million KWh.Oil well liquid level is examined
The whether accurate of survey is one of foundation of pump parameter setting in oil pumper running, with oil well extraction from the superficial to the deep, well
Middle liquid level is gradually reduced, and the abundant intensity of oil pumping pump is more and more not enough, to the last occurs sky to take out phenomenon, if do not controlled
System, can waste electric energy.For improving oil well output to greatest extent, reduce exploitation energy consumption, real-time liquid level monitoring is become with oil pumper
The trends exploitation that frequency control technology combines will be the developing direction of the current production technique in oil field.
Hydrodynamic face test process is：Well head sound-producing device produces infrasonic wave by inflated for deflated mode and is used as energy sound
Source, when running into casing coupling, liquid level barrier, produces infrasonic sound echo, echo receives collection through correlation detecting circuit.Well head sounding
After device produces sound wave, along tubing and casing annular space travel downward, after running into box cupling, part reflection upwardly propagates sound wave, another
Part continues travel downward, until it reaches liquid level, and liquid surface wave reflection upwardly propagates and received by the infrasonic sensor of well head.Well head
Instrument should receive box cupling echo in addition it is also necessary to receive liquid level echo, could finally calculate the level of producing well.Same
In a bite oil well, the well head initial segment box cupling signal amplitude that infrasonic sensor receives reaches several volts, the shaft bottom liquid level of reception
Ripple signal is affected level by oil pumper extraction frequency can be changed, and amplitude is likely to volt level from microvolt, different oil
All there are different amplitude-frequency characteristics changes in well or same oil well different period, manually adjustment instrument gain is cannot be real repeatedly
Existing automatic signal collection.
The hydrodynamic face of oil well is the key index of reaction stratum fluid supply capacity, and it is to adopt that liquid level test usual way is moved in oil field
Sound wave principle of reflection.With oil recovery from the superficial to the deep, the increase year by year of level, liquid level test is more difficult.Acoustic signals
Decay exponentially characteristic, liquid level test infrasonic sensor signal amplitude change from μ V level to several volts, signal is from generation
Time to end is short and requires test signal undistorted, wants to pass through repeatedly regulation stall satisfaction requirement in test process
Hardly possible.With the automatic widespread demand monitoring liquid level, how to meet million grades of Fold signal variation issue becomes more next
More prominent, this is also that oil field automatic liquid level monitoring is difficult to the reason promote.
Content of the invention
For improving oil well output to greatest extent, reduce exploitation energy consumption, a kind of well fluid level test adaptive circuit be provided,
To realize the trends exploitation that real-time liquid level monitoring is combined with VVVF control technique for well pumping units.
For solving the above problems, intend testing adaptive circuit using such a well fluid level, signal generator V1's
Positive pole is connected to the input positive terminal of amplifier U1 respectively after resistance R0 and electric capacity C1, and the negative pole of signal generator V1 is through electric capacity C2 and electricity
The low-pass filter circuit of resistance R1 composition is connected to the input negative terminal of amplifier U1, rejects high-frequency signal, the outfan of amplifier U1 is connected to fortune
Put the amplifying circuit of U2 composition, the outfan of amplifier U2 is connected to the S pole of metal-oxide-semiconductor Q1, and the G pole of metal-oxide-semiconductor Q1 is through resistance R3 and two poles
It is connected to the outfan of amplifier U1, D pole is connected to the input negative terminal of amplifier U1, the positive pole of diode D1 and amplifier U1 outfan after pipe D1
It is connected.
In aforementioned circuit, metal-oxide-semiconductor Q1 is junction field type metal-oxide-semiconductor 2N5485, and the amplifier of whole circuit must be from high impedance, low
Bias current amplifier, amplifier U1 and amplifier U2 are high impedance amplifier ADA4627, and diode is Schottky two pole of low voltage difference
Pipe；
In aforementioned circuit, the signal output part of amplifier U1 is connected to successively after resistance R6, electric capacity C5, resistance R7 and resistance R5
The input negative terminal of amplifier U2, the line between electric capacity C5 and resistance R7 is connected to the input positive terminal of amplifier U2, and between R7 and R8
Line connects virtual earth；
In aforementioned circuit, the negative pole of signal generator V1 is connected to the input negative terminal of amplifier U1 through electric capacity C2 and resistance R1, letter
Line number between generator V1 and electric capacity C2 connects virtual earth, R2 and C3 is in parallel and is respectively connecting to the input negative terminal of amplifier U1 and defeated
Go out end, R2 and C3 composition high-pass filtering circuit rejects low frequency signal；
In aforementioned circuit, diode D4, diode D5 and resistance R9 three are in parallel, and two ends are connected to the defeated of amplifier U2 respectively
Enter negative terminal and outfan, the access of diode D4 and D5 is in opposite direction, diode D4, D5 are used for adjusting the threshold value of output voltage,
The outfan of amplifier U2 is connected to the S pole of metal-oxide-semiconductor G1, the line warp of amplifier U2 and diode D2 successively through diode D2 and resistance R4
Diode D3 is connected to virtual earth, and electric capacity C4 and resistance R5 is in parallel, and the one end of the two is connected to the company between resistance R4 and diode D2
Line, another termination virtual earth, diode D2 with D3 is positive pole and is connected with the outfan of amplifier U2, and D2, D3 are used for AC signal
It is converted into DC control signal.
From amplifier U1 and U2, metal-oxide-semiconductor G1, diode D1 and resistance R1, R2, R3, electric capacity C2, C3 composition gain control electricity
Road, this circuit is applied to the signal measurement of wide dynamic range, and voltage amplification factor can change to more than 2000 times from 0.01 times, electricity
The amplitude-frequency characteristic on road can be followed amplification and be changed, the acoustic signals amplitude-frequency characteristic energy good match with oil well reflection；Prime
The output signal of U1 built-up circuit enters the amplifying circuit of U2 composition after C5, R7 sampling, controls Q1, enter after rectifying and wave-filtering
Row self-adapting signal amplifies, and diode D4, D5 can adjust the threshold value of output voltage, reduces the bias current of whole system.
Compared with prior art, this utility model has the advantage that：
1) signal response dynamics wide ranges.Acoustic signals assume the decay of index shape in sleeve pipe, and the acoustic signals of well head are non-
Chang Qianglie, oil well more than km for the acoustic signals that shaft bottom is reflected is typically less than the 0.01% of original signal amplitude.
2) self adaptation amplification is high.Generally only tens times of the auto-gain circuit of application in video, audio frequency.This electricity
Road carries out Gain Automatic regulation using the linear zone of junction field type metal-oxide-semiconductor, and amplification excursion is up to thousand of times it is ensured that oil well
The accuracy of level detection, obtains good result in the remote liquid level monitoring of company.
3) amplitude-frequency characteristic ability of tracking is strong.The different periods frequency characteristic propagated in oil well is not fixed, and signal receives just
Phase is high-frequency signal, and mid-term is broadband signal, and final stage is low frequency signal.The filter circuit amplitude-frequency characteristic of this circuit can be followed the tracks of
The oil well liquid level signal frequency of different periods.
4) measurement of high impedance small-signal.The measurement sensor of liquid level signal uses piezoelectric transducer, its signal
Source impedance reaches tens M Ω, is vulnerable to the posting of input resistance, input bias current, leakage current and circuit board of measuring system
Raw influence of leakage current.This circuit selects high input impedance, the FET amplifier of low noise, and its input impedance is up to 1012 Ω, input
Bias current is pA level.
5) consume electric current little.The signal of this circuit zooms in or out and belongs to voltage-controlled amplification, in signal span of control, does not have
Extra Current amplifier, system power will not great changes have taken place as common gain circuitry.
Brief description
Fig. 1 is circuit diagram of the present utility model.
Specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below will be new to this practicality by accompanying drawing
Type is described in further detail,
Embodiment：
Referring to the drawings 1, the present embodiment provides a kind of well fluid level to test adaptive circuit, and metal-oxide-semiconductor Q1 is junction field type MOS
Pipe 2N5485, amplifier U1 and amplifier U2 are high impedance amplifier ADA4627, and diode is the Schottky diode of low voltage difference.
The positive pole of signal generator V1 is connected to the input positive terminal of amplifier U1 respectively after resistance R0 and electric capacity C1, and signal occurs
The negative pole of device V1 is connected to the input negative terminal of amplifier U1, the line between signal generator V1 and electric capacity C2 through electric capacity C2 and resistance R1
Connect virtual earth, R2 and C3 be in parallel and input negative terminal and outfan that be respectively connecting to amplifier U1, R2 and C3 forms high-pass filtering circuit
Reject low frequency signal, the signal output part of amplifier U1 is connected to amplifier U2 successively after resistance R6, electric capacity C5, resistance R7 and resistance R5
Input negative terminal, the line between electric capacity C5 and resistance R7 is connected to the input positive terminal of amplifier U2, and the line between R7 and R8 connects
Virtual earth, the outfan of amplifier U2 is connected to the S pole of metal-oxide-semiconductor Q1, and the G pole of metal-oxide-semiconductor Q1 is connected to amplifier after resistance R3 and diode D1
The outfan of U1, D pole is connected to the input negative terminal of amplifier U1, and the positive pole of diode D1 is connected with amplifier U1 outfan；
Diode D4, diode D5 and resistance R9 three are in parallel, and two ends are connected to the input negative terminal of amplifier U2 and defeated respectively
Go out end, the access of diode D4 and D5 is in opposite direction, diode D4, D5 are used for adjusting the threshold value of output voltage, amplifier U2 defeated
Go out the S pole that end is connected to metal-oxide-semiconductor G1 successively through diode D2 and resistance R4, amplifier U2 is connected through diode D3 with the line of diode D2
To virtual earth, electric capacity C4 and resistance R5 is in parallel, and the one end of the two is connected to the line between resistance R4 and diode D2, another termination
Virtual earth, diode D2 with D3 is positive pole and is connected with the outfan of amplifier U2.
Claims (5)
1. a kind of well fluid level test adaptive circuit it is characterised in that：The positive pole of signal generator V1 is respectively through resistance R0
With the input positive terminal being connected to amplifier U1 after electric capacity C1, the negative pole of the signal generator V1 low pass filtered through electric capacity C2 and resistance R1 composition
Wave circuit is connected to the input negative terminal of amplifier U1, and the outfan of amplifier U1 is connected to the amplifying circuit of amplifier U2 composition, amplifier U2 defeated
Go out the S pole that end is connected to metal-oxide-semiconductor Q1, the G pole of metal-oxide-semiconductor Q1 is connected to the outfan of amplifier U1 after resistance R3 and diode D1, D pole is even
To the input negative terminal of amplifier U1, the positive pole of diode D1 is connected with amplifier U1 outfan.
2. according to claim 1 a kind of well fluid level test adaptive circuit it is characterised in that：Metal-oxide-semiconductor Q1 is junction field
Type metal-oxide-semiconductor 2N5485, amplifier U1 and amplifier U2 are high impedance amplifier ADA4627, and diode is Schottky two pole of low voltage difference
Pipe.
3. according to claim 1 a kind of well fluid level test adaptive circuit it is characterised in that：The signal of amplifier U1 is defeated
Go out end and be connected to the input negative terminal of amplifier U2 successively after resistance R6, electric capacity C5, resistance R7 and resistance R5, electric capacity C5 and resistance R7 it
Between line be connected to the input positive terminal of amplifier U2, and the line between R7 and R8 connects virtual earth.
4. according to claim 1 a kind of well fluid level test adaptive circuit it is characterised in that：Signal generator V1's
Negative pole is connected to the input negative terminal of amplifier U1 through electric capacity C2 and resistance R1, and the line between signal generator V1 and electric capacity C2 connects void
Ground, R2 and C3 be in parallel and input negative terminal and outfan that be respectively connecting to amplifier U1, R2 and C3 forms high-pass filtering circuit.
5. according to claim 1 a kind of well fluid level test adaptive circuit it is characterised in that：Also include being arranged in parallel
Diode D4, diode D5 and resistance R9, and this parallel circuit two ends is connected to input negative terminal and the outfan of amplifier U2 respectively,
The access of diode D4 and D5 is in opposite direction, and the outfan of amplifier U2 is connected to the S of metal-oxide-semiconductor G1 successively through diode D2 and resistance R4
Pole, amplifier U2 is connected to virtual earth with the line of diode D2 through diode D3, and electric capacity C4 and resistance R5 is in parallel, and the one end of the two is even
Line to resistance R4 and diode D2, another termination virtual earth, diode D2 and D3 is the output of positive pole and amplifier U2
End is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620935691.9U CN205977202U (en) | 2016-08-25 | 2016-08-25 | Oil well dynamic fluid level tests self -adaptive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620935691.9U CN205977202U (en) | 2016-08-25 | 2016-08-25 | Oil well dynamic fluid level tests self -adaptive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205977202U true CN205977202U (en) | 2017-02-22 |
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ID=58035072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620935691.9U Active CN205977202U (en) | 2016-08-25 | 2016-08-25 | Oil well dynamic fluid level tests self -adaptive circuit |
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| CN (1) | CN205977202U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145300A (en) * | 2019-05-30 | 2019-08-20 | 中国石油天然气股份有限公司 | A kind of binary channels sound transducer and its circuit suitable for oil well pressure-testing |
-
2016
- 2016-08-25 CN CN201620935691.9U patent/CN205977202U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145300A (en) * | 2019-05-30 | 2019-08-20 | 中国石油天然气股份有限公司 | A kind of binary channels sound transducer and its circuit suitable for oil well pressure-testing |
| CN110145300B (en) * | 2019-05-30 | 2022-03-01 | 中国石油天然气股份有限公司 | Double-channel sound transmitter suitable for oil well pressure measurement and circuit thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |