CN105634307B - Intelligent drilling tool down-hole power implementation method and pulse drive method and circuit - Google Patents
Intelligent drilling tool down-hole power implementation method and pulse drive method and circuit Download PDFInfo
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- CN105634307B CN105634307B CN201610124425.2A CN201610124425A CN105634307B CN 105634307 B CN105634307 B CN 105634307B CN 201610124425 A CN201610124425 A CN 201610124425A CN 105634307 B CN105634307 B CN 105634307B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/23—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only arranged for operation in parallel
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator
Abstract
The invention provides a kind of intelligent drilling tool down-hole power and pulse driving circuit, including sequentially connected mud turbine generator, three phase rectifier filter circuit, voltage regulator circuit, inserting tube, signal acquisition circuit, control circuit and driving circuit, the voltage regulator circuit is the parallel-connection structure of n independent regulated power supplies, each regulated power supply includes being sequentially connected the loop circuit constituted by flyback transformer, halfwave rectifier filter circuit, feed circuit, pulse-width modulation circuit, and the output end of the halfwave rectifier filter circuit connects inserting tube.The invention, which has the advantage that, designs down-hole power and pulsed drive system based on pulse modulation technology, transformation of electrical energy is carried out by flyback switch voltage-stabilized source according to load power demand, obtaining stable DC can export, the pulse-width modulation waveform of certain dutyfactor value is exported by microprocessor pulsewidth modulation port, guarantees the stabilization of pulse signal generator driving current.
Description
Technical field
The invention belongs to petroleum, gas drilling technical field, more particularly, to a kind of intelligent drilling tool underground
Power supply implementation method and pulse drive method and circuit.
Background technique
In oil drilling tool, drilling fluid mud washes away the rotor of turbogenerator, and turbogenerator generates low frequency three-phase
AC energy, for powering for power loads such as oil drilling tool electronic control units, meanwhile, drilling fluid mud is as transmission
Medium realizes underground probe measurement by changing the cross-sectional area of mud runner according to coding requirement using pulse signal generator
The transmitted in both directions of signal and ground control signal.However, the fluctuation of drilling fluid mud displacement is larger due in drilling process, lead
Causing the electric energy converted out by mud turbine generator, there are biggish fluctuations, and the stability for causing power load to work is poor, pulse
When signal generator generates pulse signal, the unstable pulse signal generator driving capability that will cause of supply voltage is insufficient, signal
There are frame losing or signal are interrupted in transmission process, so as to cause ground decoding error or no signal, intelligent drilling tool is influenced
Working performance and service life.
Pulse modulation technology maintains burning voltage to export as a kind of by controlling the ratio of power device make-and-break time
Technology, have many advantages, such as wide input voltage range, small in size, high-efficient, be applied in the design of down-hole power system,
The wide input range AC energy that mud turbine generator is converted out is converted into suitably stablizing directly according to different loads demand
Power output is flowed, the stability and safety of power load work are improved；It is wide for mud turbine generator converting electrical energy range
The characteristics of, reasonable distribution is carried out using supply voltage of the pulse modulation technology to pulse signal generator, guarantees pulse signal hair
The stability of raw device driving current improves the stability and standard of mud pulse signal transmission to make it have enough driving capabilities
True property, reduce the frame losing because of present in signals transmission, caused by no signal phenomenon underground survey loss of data risk.
Summary of the invention
In view of this, the invention is directed to a kind of intelligent drilling tool down-hole power and pulse driving circuit, with
Down-hole power system power supply stability caused by solution mud flow rate fluctuation is big is poor, pulse signal generator driving capability is insufficient
Problem.
In order to achieve the above objectives, the technical solution of the invention is achieved in that
A kind of intelligent drilling tool down-hole power and pulse driving circuit, including sequentially connected mud turbine generator,
Three phase rectifier filter circuit, voltage regulator circuit, inserting tube, signal acquisition circuit, control circuit and driving circuit,
The voltage regulator circuit is the parallel-connection structure of n independent regulated power supplies, and each regulated power supply includes by anti-
Swash the loop circuit that formula transformer, halfwave rectifier filter circuit, feed circuit, pulse-width modulation circuit are sequentially connected composition, it is described
The input terminal of flyback transformer connects three phase rectifier filter circuit, and the output end of the halfwave rectifier filter circuit, which connects, to be visited
Pipe；Wherein, n is the natural number more than or equal to 1；
The input terminal of the signal acquisition circuit connects the output end of the output end signal of current rectifying and wave filtering circuit, voltage regulator circuit
The output end signal of signal, inserting tube；
The control circuit includes microprocessor, the output end of the microprocessor connection signal Acquisition Circuit；
The driving circuit is also connected with the output end signal of three phase rectifier filter circuit.
Further, protection electricity is equipped between the three phase rectifier filter circuit and the pulse-width modulation circuit of voltage regulator circuit
Road, the protection circuit include voltage protection circuit and current protecting circuit, voltage protection circuit include under-voltage protecting circuit and
Overvoltage crowbar.
Further, flow equalizing circuit, the equal galvanic electricity are equipped between each halfwave rectifier filter circuit and inserting tube
Road connection signal Acquisition Circuit and feed circuit.
Further, shock absorbing circuit is equipped between the three phase rectifier filter circuit and voltage regulator circuit, shock absorbing circuit can incite somebody to action
The oscillating voltage of sampling imports ground terminal by weakening resistance.
Compared with the existing technology, the invention intelligent drilling tool down-hole power and pulse driving circuit have following excellent
Gesture:
Down-hole power and pulsed drive system are designed based on pulse modulation technology, is opened according to load power demand by inverse-excitation type
It closes regulated power supply and carries out transformation of electrical energy, obtaining stable DC can export, and be exported by microprocessor pulsewidth modulation port certain
The pulse-width modulation waveform of dutyfactor value, guarantee pulse signal generator driving current stabilization, meet underground high temperature, vibration,
The power demand of the loads such as intelligent drilling tool electronic control unit, guarantees pulse signal generator work under the adverse circumstances such as impact
There is enough driving capabilities when making, improve stability, safety and the service life of intelligent drilling tool underground work.
The another object of the invention is to propose that a kind of intelligent drilling tool down-hole power implementation method and pulse are driven
Dynamic method, with solve mud flow rate fluctuation it is big caused by down-hole power system power supply stability is poor, pulse signal generator drive
The hypodynamic problem of kinetic energy.
In order to achieve the above objectives, the technical solution of the invention is achieved in that
A kind of intelligent drilling tool down-hole power implementation method and pulse drive method, it is characterised in that in following
Hold:
Step 1: low frequency threephase AC electric energy is generated by turbogenerator；
Step 2: rectifying and wave-filtering is carried out to AC energy by three phase rectifier filter circuit；
Step 3: by the output voltage of voltage protection circuit sampling three-phase current rectifying and wave filtering circuit, passing through current protecting circuit
The loop current of power-supply system under sampled well,
When the output voltage of three phase rectifier filter circuit, the loop current of down-hole power system are within the scope of secure threshold
When, high-frequency ac electric energy is converted by the thick direct current energy that flyback transformer exports three phase rectifier filter circuit, then by
Halfwave rectifier filter circuit can be carried out halfwave rectifier and capacitor filtering to high-frequency alternating current, while sample half-wave by feed circuit
The output voltage of current rectifying and wave filtering circuit is sent into pulse-width modulation circuit, adjusts pulse in a cycle by pulse-width modulation circuit and believes
Number dutyfactor value, to control the energy conversion efficiency of flyback transformer, wherein flyback transformer, halfwave rectifier filtered electrical
The loop circuit that road, feed circuit, pulse-width modulation circuit are sequentially connected composition constitutes regulated power supply；Wherein work as load demand power
It is larger, when single regulated power supply cannot be met the requirements, using the structure of n regulated power supply parallel connection；
Pulsewidth modulation when detecting that voltage and current value is in except preset threshold range, in regulated power supply
Circuit stops output pulse signal, and flyback transformer stops working, and regulated power supply is without power output；
Step 4: when load demand power is larger, and single regulated power supply cannot be met the requirements, being sampled by flow equalizing circuit
The output electric current of the halfwave rectifier filter circuit of regulated power supply, output adjust voltage to feed circuit, start to control with feed circuit one
The dutyfactor value of pulse-width modulation circuit output pulse signal processed, the corresponding flow equalizing circuit of a regulated power supply make n pressure stabilizing electricity
The output electric current of source module is evenly distributed；
Step 5: drilling parameter information and formation information data being measured by inserting tube, and measurement data is carried out inside it
Coding transmission is carried out after processing；Regulated power supply powers to inserting tube；
Step 6: by the output voltage of signal acquisition circuit sampling three-phase current rectifying and wave filtering circuit, n regulated power supply it is defeated
The measurement data of electric current, the output voltage of regulated power supply and inserting tube coding out；
Step 7: judging whether inserting tube uploads efficient coding signal, if not uploading, by the sampling time interval of setting
Continue to sample by signal acquisition circuit；
Step 8: if inserting tube uploads efficient coding signal, which is sent into micro- in control circuit through signal acquisition circuit
In processor；
Step 9: the output voltage and measurement number that signal acquisition circuit is acquired by the microprocessor in control circuit
According to being handled, and in output adjustment a cycle pulse-width modulation waveform duty ratio pulse-width modulation waveform；
Step 10: the pulse-width modulation waveform of microprocessor output is received by driving circuit, and drive pulse signal occurs
Device generates pressure pulse, then is transmitted at the standpipe of ground through drilling fluid mud, shows on the computer screen after decoding.
When detecting that voltage and current value within the scope of secure threshold, will also judge whether there is self-excitation in above-mentioned steps 3
Oscillation, and if it exists, oscillation elimination is carried out by the high-power resistance in shock absorbing circuit.
Microprocessor in above-mentioned steps 9 will be at the output voltage and measurement data that acquire to signal acquisition circuit
Reason, and store in the storage circuit into control circuit, then monitor the operating status of microprocessor in real time by monitoring circuit.
In above-mentioned steps 4: n flow equalizing circuit is connected by current equalizing bus bar, using maximum current method, with maximum sample rate current
On the basis of, n-1 flow equalizing circuit adjusts respective control voltage.
The intelligent drilling tool down-hole power implementation method and pulse drive method and intelligent drilling tool down-hole power
And possessed advantage is identical compared with the existing technology for pulse driving circuit, details are not described herein.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide to further understand the invention, present invention wound
The illustrative embodiments and their description made are used to explain the present invention creation, do not constitute the improper restriction to the invention.?
In attached drawing:
Fig. 1 is intelligent drilling tool down-hole power and pulsed drive system construction drawing described in the invention embodiment.
Fig. 2 is intelligent drilling tool down-hole power and pulsed drive working-flow described in the invention embodiment
Figure.
Fig. 3 is one embodiment of intelligent drilling tool down-hole power and pulsed drive system described in the invention embodiment
Input-output efficiency test curve.
Fig. 4 is one embodiment of intelligent drilling tool down-hole power and pulsed drive system described in the invention embodiment
High temperature test curve.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the invention can
To be combined with each other.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments creates.
A kind of intelligent drilling tool down-hole power and pulse driving circuit, as shown in Figure 1, including sequentially connected mud whirlpool
Turbine generator, three phase rectifier filter circuit, voltage regulator circuit, inserting tube, signal acquisition circuit, control circuit and driving circuit,
The mud turbine generator generates low frequency threephase AC electric energy, for powering for intelligent drilling tool；
The three phase rectifier filter circuit can be carried out diode to the low frequency three-phase alternating current of mud turbine generator output
Full-bridge rectification and capacitor filtering export thick direct current energy；
The voltage regulator circuit is the parallel-connection structure of n independent regulated power supplies, and each regulated power supply includes by anti-
Swash the loop circuit that formula transformer, halfwave rectifier filter circuit, feed circuit, pulse-width modulation circuit are sequentially connected composition, it is described
The output end signal of the input terminal connection three phase rectifier filter circuit of flyback transformer, three phase rectifier filter circuit is exported
Thick direct current energy is converted into high-frequency ac electric energy；The halfwave rectifier filter circuit can be carried out diode half-wave to high-frequency alternating current
Output is to inserting tube after rectification and capacitor filtering；Feed circuit samples the output voltage of halfwave rectifier filter circuit, pulsewidth modulation electricity
Road adjusts the dutyfactor value of output pulse signal in a cycle according to the sampled value of feed circuit, for controlling inverse-excitation type transformation
The energy conversion efficiency of device achievees the purpose that stabilize the output voltage；Wherein, n is the natural number more than or equal to 1, and the value of n is by driving
Watt level needed for load determines, realizes and thick direct current energy is converted into stable fine direct current energy according to loading demand；
The inserting tube includes drilling parameters information and the resistivity such as hole deviation, orientation for measuring, and there are also the stratum such as gamma letters
Breath, carries out coding transmission after inside handles measurement data；
The input terminal of the signal acquisition circuit connects the output end of the output end signal of current rectifying and wave filtering circuit, voltage regulator circuit
The output end signal of signal and inserting tube；For acquire the output voltage of three phase rectifier filter circuit, each independent regulated power supply it is defeated
The measurement data of electric current, the output voltage of regulated power supply and inserting tube coding out；
The control circuit includes microprocessor, and the output end of the microprocessor connection signal Acquisition Circuit further includes
Storage circuit, monitoring circuit and the computer connecting with microprocessor, microprocessor receive the sampled signal of signal acquisition circuit,
It after carrying out A/D conversion and calculating, is saved by storage circuit, also generation pulse-width modulation waveform；Monitor circuit monitors micro process
The operating status of device carries out reset by monitoring circuit and operates when microprocessor work exception, micro- by serial communication interface
Information exchange can be achieved between processor and computer；
The driving circuit is also connected with the output end signal of three phase rectifier filter circuit, arteries and veins of the driving circuit in control circuit
Under the control of wide modulation waveform, drive pulse signal generator movement, by the measurement data of inserting tube coding in the form of pressure wave
It is transmitted at the standpipe of ground；
The measurement data of the inserting tube coding enters in the microprocessor in control circuit through signal acquisition circuit, in Wei Chu
After reason device receives effective measuring signal, within the signal effective period, microprocessor is collected according to signal acquisition circuit
The output voltage values of current three phase rectifier filter circuit adjust the dutyfactor value of output pulse waveform, driving circuit is whole by three-phase
The thick direct current energy power supply of wide scope of filter circuit output is flowed, under the control of pulse-width modulation waveform, driving circuit is pulse letter
Number generator provides stable driving current, guarantees when the measurement data that inserting tube encodes arrives, the needle of pulse signal generator
Valve regular event generates pressure pulse, is transferred at the standpipe of ground, is shown after decoding on the computer screen through drilling fluid mud,
Analysis decision is carried out for ground staff.
Flow equalizing circuit, the flow equalizing circuit connection signal Acquisition Circuit are equipped between each regulated power supply and inserting tube
And feed circuit, when load demand power is larger, and single regulated power supply cannot be met the requirements, flow equalizing circuit samples halfwave rectifier
The output electric current of filter circuit, output adjust voltage to feed circuit, and pulse-width modulation circuit output is controlled together with feed circuit
The dutyfactor value of pulse signal is evenly distributed the output electric current of n power module of voltage regulation；By adjusting n regulated power supply
Electric current is exported, the output current balance of the regulated power supply of each parallel connection is distributed, prevents single regulated power supply due to power is excessive
It burns；
The flow equalizing circuit 1 is connected to flow equalizing circuit n by current equalizing bus bar, using maximum current method, with maximum sampling electricity
On the basis of stream, n-1 flow equalizing circuit adjusts respective control voltage, and by taking flow equalizing circuit 1 as an example, flow equalizing circuit 1 samples pressure stabilizing electricity
The output electric current in source 1, if the current value maximum sample rate current, flow equalizing circuit 1 is without output, if the current value is not maximum sampling
Electric current, then feed circuit of the output of the flow equalizing circuit 1 control voltage into regulated power supply 1, controls pulsewidth tune together with feedback voltage
The dutyfactor value of circuit output pulse waveform processed, by the energy conversion efficiency, the adjustment regulated power supply 1 that adjust flyback transformer
The output power of output voltage control regulated power supply 1 keep in balance with regulated power supply 2 to regulated power supply n.
Protection circuit is equipped between the three phase rectifier filter circuit and voltage regulator circuit, the protection circuit includes that voltage is protected
Protection circuit and current protecting circuit, voltage protection circuit include under-voltage protecting circuit and overvoltage crowbar, voltage protection circuit
The output voltage for monitoring three phase rectifier filter circuit, outputs control signals to pulsewidth modulation of the regulated power supply 1 into regulated power supply n
In circuit, when given threshold of the voltage value lower than under-voltage protecting circuit or when higher than the given threshold of overvoltage crowbar, surely
Pulse-width modulation circuit of the voltage source 1 into regulated power supply n stops working, and regulated power supply output voltage is 0；At the voltage value
When in voltage protection threshold range, pulse-width modulation circuit of the regulated power supply 1 into regulated power supply n is worked normally, regulated power supply
Stable DC electric energy is exported according to loading demand；Current protecting circuit monitors the circuit electricity of down-hole power and pulsed drive system
Stream, outputs control signals to regulated power supply 1 in the pulse-width modulation circuit into regulated power supply n, when the current value is beyond setting
When current threshold range, pulse-width modulation circuit of the regulated power supply 1 into regulated power supply n stops working, regulated power supply output electricity
Pressure is 0；When the current value is within the scope of the current threshold of setting, pulse-width modulation circuit of the regulated power supply 1 into regulated power supply n
It works normally, regulated power supply exports stable DC electric energy according to loading demand.
Shock absorbing circuit is equipped between the three phase rectifier filter circuit and voltage regulator circuit, for eliminating caused by load variation
The oscillation and step-out of mud turbine generator reduce output voltage fluctuation, maintain down-hole power and pulsed drive system output electricity
The stabilization of pressure；The output voltage of shock absorbing circuit sampling three-phase current rectifying and wave filtering circuit, therefrom extracts AC ripple ingredient, when the friendship
When stream ripple components reach the weakening threshold value of setting, which is imported into ground terminal by weakening resistance, to prevent this certainly
The normal work of Induced Oscillation influence power load.
A kind of intelligent drilling tool down-hole power implementation method and pulse drive method of the invention embodiment, such as scheme
Include following content shown in 2:
Step 1: low frequency threephase AC electric energy is generated by turbogenerator；
Step 2: diode full-bridge rectification and capacitor filtering being carried out to AC energy by three phase rectifier filter circuit, by whirlpool
The low-frequency ac electric energy that turbine generator generates is converted into thick direct current energy；
Step 3: by the output voltage of voltage protection circuit sampling three-phase current rectifying and wave filtering circuit, passing through current protecting circuit
The loop current of power-supply system under sampled well,
When the output voltage of three phase rectifier filter circuit, the loop current of down-hole power system are within the scope of secure threshold
When, high-frequency ac electric energy is converted by the thick direct current energy that flyback transformer exports three phase rectifier filter circuit, then by
Halfwave rectifier filter circuit can be carried out halfwave rectifier and capacitor filtering to high-frequency alternating current, while sample half-wave by feed circuit
The output voltage of current rectifying and wave filtering circuit is sent into pulse-width modulation circuit, adjusts pulse in a cycle by pulse-width modulation circuit and believes
Number dutyfactor value achieve the purpose that stabilize the output voltage to control the energy conversion efficiency of flyback transformer；
Wherein flyback transformer, halfwave rectifier filter circuit, feed circuit, pulse-width modulation circuit are sequentially connected composition
Loop circuit constitutes regulated power supply；Wherein when load demand power is larger, and single regulated power supply cannot be met the requirements, using n
The structure of a regulated power supply parallel connection；
Pulsewidth modulation when detecting that voltage and current value is in except preset threshold range, in regulated power supply
Circuit stops output pulse signal, and flyback transformer stops working, and regulated power supply stops without power output, intelligent drilling tool
Work；
Step 4: when load demand power is larger, and single regulated power supply cannot be met the requirements, being sampled by flow equalizing circuit
The output electric current of the halfwave rectifier filter circuit of regulated power supply, output adjust voltage to feed circuit, start to control with feed circuit one
The dutyfactor value of pulse-width modulation circuit output pulse signal processed, the corresponding flow equalizing circuit of a regulated power supply make n pressure stabilizing electricity
The output electric current of source module is evenly distributed；
Step 5: drilling parameter information and formation information data being measured by inserting tube, and measurement data is carried out inside it
Coding transmission is carried out after processing；Regulated power supply powers to inserting tube；
Step 6: by the output voltage of signal acquisition circuit sampling three-phase current rectifying and wave filtering circuit, n regulated power supply it is defeated
The measurement data of electric current, the output voltage of regulated power supply and inserting tube coding out；
Step 7: judging whether inserting tube uploads efficient coding signal, if not uploading, by the sampling time interval of setting
Continue to sample by signal acquisition circuit；
Step 8: if inserting tube uploads efficient coding signal, which is sent into micro- in control circuit through signal acquisition circuit
In processor；
Step 9: the output voltage and measurement number that signal acquisition circuit is acquired by the microprocessor in control circuit
According to being handled, and in output adjustment a cycle pulse-width modulation waveform duty ratio pulse-width modulation waveform；
Step 10: the pulse-width modulation waveform of microprocessor output is received by driving circuit, and drive pulse signal occurs
Device generates pressure pulse, then is transmitted at the standpipe of ground through drilling fluid mud, shows on the computer screen after decoding.
Step 11: repeat step 4-10, during intelligent drilling tool work, be continuously power load provide it is stable
Direct current energy, and upload the measurement data of inserting tube coding.
When detecting voltage and current value within the scope of secure threshold in above-mentioned steps 3, also to judge whether to become because of load
There are self-oscillations for change, and if it exists, carries out oscillation elimination by the high-power resistance in shock absorbing circuit.
In above-mentioned steps 4: n flow equalizing circuit is connected by current equalizing bus bar, using maximum current method, with maximum sample rate current
On the basis of, n-1 flow equalizing circuit adjusts respective control voltage.
Microprocessor in above-mentioned steps 9 will be at the output voltage and measurement data that acquire to signal acquisition circuit
Reason, and store in the storage circuit into control circuit, then monitor the operating status of microprocessor in real time by monitoring circuit.
It is illustrated in figure 3 the input-output efficiency test curve of one embodiment of the invention, experimental condition are as follows: three phase rectifier
The input termination three-phase alternating-current supply of filter circuit, simulation 1 rotation speed change range 2500rpm of mud turbine generator~
Input-output efficiency test when 5500rpm designs 37 ± 1V of output voltage, is replaced at inserting tube with CC E-load, electric current
Variation range is 0A~3A, and by the measurement data of signal generator simulation inserting tube coding, signal generator is set as square-wave pulse,
Frequency 0.1Hz, pulse amplitude 5V, duty ratio 10%, the output termination pulse signal generator of driving circuit, 2500rpm~
Shown in 5500rpm output voltage curve such as Fig. 3 (a), 2500rpm~5500rpm input-output efficiency curve such as Fig. 3 (b) institute
Show, to distinguish input-output curve under different rotating speeds, ordinate is deviated as unit of 10%.Wherein when 5500rpm
Test data is as shown in table 3-1.
Table 3-1 5500rpm input-output efficiency test
In Fig. 3 (a), with the increase of load current, load voltage is gradually decreased, variation range design requirement it
It is interior；In Fig. 3 (b), with the increase of load current, the input-output efficiency of down-hole power and pulsed drive system is maintained
80% or so, meet the requirement of intelligent drilling tool underground work.
It is illustrated in figure 4 the high temperature test curve of one embodiment of the invention, experimental condition are as follows: three phase rectifier filter circuit
Input terminates three-phase alternating-current supply, input-output efficiency test when simulating 1 revolving speed 4000rpm of mud turbine generator, at inserting tube
It is replaced with CC E-load, current value is set as 2A, and temperature test range is 100 DEG C~130 DEG C, and table 4-1 is high temperature side
Data are tried, Fig. 4 (a) is the high temperature test input characteristic curve drawn by table 4-1, and Fig. 4 (b) is the high temperature side drawn by table 4-1
Output characteristic curve is tried, Fig. 4 (c) is the high temperature test input-output efficiency curve drawn by table 4-1.
Table 4-1 down-hole power and pulsed drive system high temperature testing experiment
In Fig. 4 (a), as temperature increases, input current increases to 0.766A from 0.729A, and input voltage keeps permanent substantially
It is fixed；In Fig. 4 (b), as temperature increases, load voltage rises to 37.77V from 36.86V, and load current is kept constant；Fig. 4 (c)
In, as temperature increases, the input-output efficiency of down-hole power and pulsed drive system is slightly promoted, 78% or so is maintained,
Meets the needs of intelligent drilling tool underground work.
When work, the low frequency threephase AC electric energy that mud turbine generator 1 generates carries out complete through three phase rectifier filter circuit
Thick direct current energy is exported after wave rectification and capacitor filtering, regulated power supply carries out transformation of electrical energy to thick direct current energy, using equal galvanic electricity
Road carries out load balancing, and output stable DC can be supplied to inserting tube, voltage and electricity of the protection circuit to down-hole power system
Stream is protected, wherein the threshold value of under-voltage protecting circuit is set as 40V, and the threshold value of overvoltage crowbar is set as 160V, overcurrent protection
The threshold value of circuit is set as 8A, and shock absorbing circuit is used to eliminate the step-out and oscillatory occurences of generator caused by load variation, guarantees defeated
The stability of electric energy out, under signal acquisition circuit production wells on the voltage of power-supply system key node, current signal and inserting tube
The encoded signal of biography is sent into control circuit, control circuit analyzes the signal received, handle after store, and root
The encoded signal uploaded according to inserting tube generates pulse-width modulation waveform by microprocessor and exports to driving circuit, controls arteries and veins by driving circuit
Signal generator movement when encoded signal arrives is rushed, mud-pulse pressure wave is generated, it is vertical to upload to ground through drilling fluid mud
It is shown at pipe, after decoding on the computer screen, carries out analysis decision for ground staff.
The invention is by generating a series of transfer efficiency of the pulse signal control electric energy of different duty values and dividing
With scheme, to provide the direct current energy of suitable, stable safety for power load, the underground work of intelligent drilling tool is improved
Stability, safety and service life.
The technical solution of the invention is not only limited to field of oil drilling, in the present invention structure of each component part and
Connection type can also be applied in whole or in part applied in the power system design of AC-DC converter to inductive load
Driving design in.
The foregoing is merely the preferred embodiments of the invention, are not intended to limit the invention creation, all at this
Within the spirit and principle of innovation and creation, any modification, equivalent replacement, improvement and so on should be included in the invention
Protection scope within.
Claims (6)
1. intelligent drilling tool down-hole power and pulse driving circuit, it is characterised in that: sent out including sequentially connected slurry turbine
Motor, three phase rectifier filter circuit, voltage regulator circuit, inserting tube, signal acquisition circuit, control circuit and driving circuit,
The voltage regulator circuit is the parallel-connection structure of n independent regulated power supplies, and each regulated power supply includes by inverse-excitation type
Transformer, halfwave rectifier filter circuit, feed circuit, pulse-width modulation circuit are sequentially connected the loop circuit of composition, the flyback
The input terminal of formula transformer connects three phase rectifier filter circuit, and the output end of the halfwave rectifier filter circuit connects inserting tube；Its
In, n is the natural number more than or equal to 1；
The output end signal of input terminal connection current rectifying and wave filtering circuit, the output end of voltage regulator circuit of the signal acquisition circuit are believed
Number, the output end signal of inserting tube；
The control circuit includes microprocessor, the output end of the microprocessor connection signal Acquisition Circuit；
The driving circuit is also connected with the output end signal of three phase rectifier filter circuit；
Shock absorbing circuit is equipped between the three phase rectifier filter circuit and voltage regulator circuit, for eliminating mud caused by load changes
The oscillation and step-out of turbogenerator, reduction output voltage fluctuation, maintenance down-hole power and pulsed drive system output voltage
Stablize；The output voltage of shock absorbing circuit sampling three-phase current rectifying and wave filtering circuit, therefrom extracts AC ripple ingredient, when the waves AC
When dynamic ingredient reaches the weakening threshold value of setting, which is imported into ground terminal by weakening resistance, to prevent self-oscillation
Influence the normal work of power load.
2. intelligent drilling tool down-hole power according to claim 1 and pulse driving circuit, it is characterised in that: described three
Protection circuit is equipped between commutating phase filter circuit and the pulse-width modulation circuit of voltage regulator circuit, the protection circuit includes that voltage is protected
Protection circuit and current protecting circuit, voltage protection circuit include under-voltage protecting circuit and overvoltage crowbar.
3. intelligent drilling tool down-hole power according to claim 1 and pulse driving circuit, it is characterised in that: Mei Gesuo
It states and is equipped with flow equalizing circuit between halfwave rectifier filter circuit and inserting tube, the flow equalizing circuit connection signal Acquisition Circuit and feedback
Circuit.
4. a kind of intelligent drilling tool down-hole power implementation method and pulse drive method, it is characterised in that include following content:
Step 1: low frequency threephase AC electric energy is generated by turbogenerator；
Step 2: rectifying and wave-filtering is carried out to AC energy by three phase rectifier filter circuit；
Step 3: by the output voltage of voltage protection circuit sampling three-phase current rectifying and wave filtering circuit, being sampled by current protecting circuit
The loop current of down-hole power system,
When the loop current of the output voltage of three phase rectifier filter circuit, down-hole power system is within the scope of secure threshold,
It is converted into high-frequency ac electric energy by the thick direct current energy that flyback transformer exports three phase rectifier filter circuit, then by half-wave
Current rectifying and wave filtering circuit can be carried out halfwave rectifier and capacitor filtering to high-frequency alternating current, while sample halfwave rectifier by feed circuit
The output voltage of filter circuit is sent into pulse-width modulation circuit, adjusts pulse signal in a cycle by pulse-width modulation circuit
Dutyfactor value, to control the energy conversion efficiency of flyback transformer, wherein flyback transformer, halfwave rectifier filter circuit,
The loop circuit that feed circuit, pulse-width modulation circuit are sequentially connected composition constitutes regulated power supply；Wherein when load demand power compared with
Greatly, when single regulated power supply cannot be met the requirements, using the structure of n regulated power supply parallel connection；
Pulse-width modulation circuit when detecting that voltage and current value is in except preset threshold range, in regulated power supply
Stop output pulse signal, flyback transformer stops working, and regulated power supply is without power output；
Step 4: when load demand power is larger, and single regulated power supply cannot be met the requirements, pressure stabilizing being sampled by flow equalizing circuit
The output electric current of the halfwave rectifier filter circuit of power supply, output adjust voltage to feed circuit, arteries and veins are controlled together with feed circuit
The dutyfactor value of wide modulation circuit output pulse signal, the corresponding flow equalizing circuit of a regulated power supply, makes n regulated power supply mould
The output electric current of block is evenly distributed；
Step 5: drilling parameter information and formation information data being measured by inserting tube, and measurement data is handled inside it
After carry out coding transmission；Regulated power supply powers to inserting tube；
Step 6: the output by the output voltage of signal acquisition circuit sampling three-phase current rectifying and wave filtering circuit, n regulated power supply is electric
The measurement data of stream, the output voltage of regulated power supply and inserting tube coding；
Step 7: judging whether inserting tube uploads efficient coding signal, if not uploading, by the sampling time interval of setting by believing
Number Acquisition Circuit continues to sample；
Step 8: if inserting tube uploads efficient coding signal, which is sent into the micro process in control circuit through signal acquisition circuit
In device；
Step 9: signal acquisition circuit is acquired by the microprocessor in control circuit output voltage and measurement data into
Row processing, and in output adjustment a cycle pulse-width modulation waveform duty ratio pulse-width modulation waveform；
Step 10: the pulse-width modulation waveform of microprocessor output is received by driving circuit, and drive pulse signal generator produces
Raw pressure pulse, then be transmitted at the standpipe of ground through drilling fluid mud, it is shown on the computer screen after decoding；
In step 3 when detecting that voltage and current value within the scope of secure threshold, will also judge whether there is self-oscillation, if
In the presence of carrying out oscillation elimination by the high-power resistance in shock absorbing circuit.
5. intelligent drilling tool down-hole power implementation method according to claim 4 and pulse drive method, feature exist
In: the microprocessor in step 9 handles the output voltage and measurement data that acquire to signal acquisition circuit, and store to
In storage circuit in control circuit, then pass through the operating status of monitoring circuit real time monitoring microprocessor.
6. intelligent drilling tool down-hole power implementation method according to claim 4 and pulse drive method, feature exist
In: in step 4: n flow equalizing circuit is connected by current equalizing bus bar, using maximum current method, on the basis of maximum sample rate current, n-
1 flow equalizing circuit adjusts respective control voltage.
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| CN109768717B (en) * | 2019-03-08 | 2020-02-14 | 中国石油天然气集团有限公司 | High-power direct-current voltage-stabilized power supply for intelligent drilling tool |
| CN115468632B (en) * | 2022-10-19 | 2023-10-20 | 佛山市汉立电子科技有限公司 | Liquid shortage detection device and method and atomizer |
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| CN104880959A (en) * | 2014-08-05 | 2015-09-02 | 中国石油集团渤海钻探工程有限公司 | While-drilling measurement sensor simulation device |
| CN104993809A (en) * | 2015-07-17 | 2015-10-21 | 中国石油集团渤海钻探工程有限公司 | Drilling fluid positive pulse signal driving circuit for intelligent drilling tool |
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| CN205584044U (en) * | 2016-03-04 | 2016-09-14 | 中国石油集团渤海钻探工程有限公司 | Intelligence drilling tool is power and pulse driving circuit in pit |
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Patent Citations (4)
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| CN104880959A (en) * | 2014-08-05 | 2015-09-02 | 中国石油集团渤海钻探工程有限公司 | While-drilling measurement sensor simulation device |
| CN104993809A (en) * | 2015-07-17 | 2015-10-21 | 中国石油集团渤海钻探工程有限公司 | Drilling fluid positive pulse signal driving circuit for intelligent drilling tool |
| CN105162331A (en) * | 2015-08-24 | 2015-12-16 | 中国石油集团渤海钻探工程有限公司 | Paralleled current sharing technology-based switching power supply circuit |
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Effective date of registration: 20210719 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: No.106 Huanghai Road, Binhai New Economic and Technological Development Zone, Tianjin 300457 Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |