CN107461165A - A kind of stop valve control device and method for measurement while drilling - Google Patents
A kind of stop valve control device and method for measurement while drilling Download PDFInfo
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- CN107461165A CN107461165A CN201710670824.3A CN201710670824A CN107461165A CN 107461165 A CN107461165 A CN 107461165A CN 201710670824 A CN201710670824 A CN 201710670824A CN 107461165 A CN107461165 A CN 107461165A
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- 238000005259 measurement Methods 0.000 title claims abstract description 23
- 238000005553 drilling Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000005669 field effect Effects 0.000 claims abstract description 83
- 239000012530 fluid Substances 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 7
- 239000013078 crystal Substances 0.000 description 45
- 239000010453 quartz Substances 0.000 description 44
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 44
- 239000000758 substrate Substances 0.000 description 42
- 239000002002 slurry Substances 0.000 description 26
- 239000007788 liquid Substances 0.000 description 11
- 238000009530 blood pressure measurement Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 241001074085 Scophthalmus aquosus Species 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 101100102627 Oscarella pearsei VIN1 gene Proteins 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Fluid Mechanics (AREA)
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Abstract
The present invention relates to a kind of control device and method, belongs to down hole drill technical field, and in particular to a kind of stop valve control device and method for measurement while drilling.Including：Stop valve, for driving the reducing motor of the cut-off threshold switch, the motor control drive circuit being connected with reducing motor, the motor control drive circuit includes：Field-effect transistor Q1 that one end is connected with single-chip microcomputer forward direction output end respectively, field-effect transistor Q3, field-effect transistor Q5；Field-effect transistor Q2 that one end is connected with single-chip microcomputer negative sense output end respectively, field-effect transistor Q4, field-effect transistor Q6；Wherein, one end that the field-effect transistor Q1 and field-effect transistor Q2 are connected be connected the U of reducing motor to, one end that the field-effect transistor Q3 and field-effect transistor Q4 are connected be connected the V of reducing motor to, one end connected with field-effect transistor Q6 the field-effect transistor Q5 be connected the W of reducing motor to.
Description
Technical field
The present invention relates to a kind of control device and method, belongs to down hole drill technical field, and in particular to one kind be used for
Bore the stop valve control device and method of measurement.
Background technology
In straight well, directional well include the drilling process of horizontal well and extended reach well, because prediction of formation pressure is inaccurate,
Often trigger the down hole problems such as drilling fluid leakage, the intrusion of stratum liquid, cave-in and differential sticking.These situations are again past
It is past to cause drillng operation time lengthening and drilling cost increase.Therefore one of key of wellbore construction is to make drilling fluid density and work as
Amount circulating density is maintained in the safe operation range of stratum fluid pressure, formation collapsed pressure and formation fracture pressure.With brill
Formation pressure testing can provide real-time checkpoint in drilling process for pore pressure model, improve the prediction essence of pore pressure
Degree, real-time optimization drilling fluid density and equivalent circulating density, avoid well kick, blowout, formation damage or unexpected formation breakdown and follow
The generation of the down-hole accidents such as ring liquid leakage.Using with formation pressure test technology is bored, pressure drop and pressure buildup test are carried out, except
Obtain also providing annular pressure in real time to optimize drilling process outside normal pressures data, can early detection high pressure zone, it is determined that
Barometric gradient, fluid boundary simultaneously and in real time adjust mud ratio, to optimize drilling well, setting of casing and completion program.Meanwhile real-time stratum
Pressure measurement data can optimize casing setting depth and provide foundation, so as to reduce operating risk and drilling cost
But it is of the prior art complicated with the pressure of the drill force measuring device, measurement parameter is single, it is impossible to suitable for annular space
The measurement of hydrophthalmia pressure and pressure difference.When measuring annular space hydrophthalmia pressure in the pressure measurement device configurations of the prior art with brill, adopt
Annular space mud pressure and hydrophthalmia mud pressure are measured respectively with two pressure sensors, so due to two pressure sensors in itself
The reason for manufacturing process, it is impossible to be prepared into completely the same pressure sensor, once two pressure sensors measure annular space
With hydrophthalmia pressure, subtract each other to annular space hydrophthalmia pressure difference value just and actual value has deviation.
The content of the invention
The present invention mainly solves the above mentioned problem present in prior art, there is provided a kind of with brill down-hole annular hydrophthalmia pressure
Measurement of force device.The device is put in the introducing section of annular space and hydrophthalmia mud hydraulic coupling respectively using quartz crystal substrate material
Put, the change of quartz crystal substrate internal vibration frequency is caused using the pressure of slurry liquid in annular space hydrophthalmia, to react annular space water
The size of the pressure of slurry liquid and pressure differential in the eyes.Current lead-through by each phase of single-chip microcomputer control three-phase direct-current brushless motor is suitable
Sequence, it is possible to so that three-phase direct-current brushless motor revolving stop valve rotates, when the stop valve being connected with hydrophthalmia turns to quartz
During the direction that crystal substrates are interconnected with hydrophthalmia slurry channel, the mud pressure in hydrophthalmia slurry channel acts on quartz completely
Crystal substrates, change quartz crystal substrate resonant frequency, the frequency shift amount can that corresponding frequency measurement circuit measures
Reflect the pressure value in hydrophthalmia slurry channel.When the stop valve being connected with annular space turns to quartz crystal substrate and annular space mud
When starching the direction that passage is interconnected, the mud pressure in annular space slurry channel acts on quartz crystal substrate completely, at this moment together
Sample can measure the mud pressure in annular space slurry channel.When two three-phase direct-current brushless motor control stop valves are simultaneously by ring
Empty hydrophthalmia slurry channel connects with quartz crystal substrate simultaneously when, annular space hydrophthalmia mud is applied to the pressure of quartz crystal substrate simultaneously
The difference of power, as annular space hydrophthalmia slurry channel mud pressure.
The above-mentioned technical problem of the present invention is mainly what is be addressed by following technical proposals：
A kind of cut-off control valve device for measurement while drilling, including：Stop valve, for driving the cut-off threshold switch
Reducing motor, the motor control drive circuit being connected with reducing motor, the motor control drive circuit include：One end respectively with
The connected field-effect transistor Q1 of single-chip microcomputer forward direction output end, field-effect transistor Q3, field-effect transistor Q5；One end respectively with
The connected field-effect transistor Q2 of single-chip microcomputer negative sense output end, field-effect transistor Q4, field-effect transistor Q6；Wherein, it is described
One end that field-effect transistor Q1 and field-effect transistor Q2 are connected is connected the U of reducing motor to the field-effect transistor Q3
The V of reducing motor is connected to the field-effect transistor Q5 and field-effect transistor with field-effect transistor Q4 one end being connected
The W of one end connection reducing motor connected Q6 to.
Optimization, a kind of above-mentioned cut-off control valve device for measurement while drilling, the stop valve is a cylinder knot
Structure, motor drive link mounting hole is set on the end face of the cylinder, is provided with the side of the cylinder in cylinder
Body opens or closes the through hole of the fluid passage when being driven and rotated by motor.
A kind of method that measurement while drilling stop valve is controlled using said apparatus, the three-phase dc reducing motor it is each mutually around
Group turns on order：
The first step：Single-chip microcomputer controls field-effect transistor Q1 and the conducting of field-effect transistor Q4 pipes；
Second step：Single-chip microcomputer controls field-effect transistor Q1 and the conducting of field-effect transistor Q6 pipes；
3rd step：Single-chip microcomputer controls field-effect transistor Q3 and the conducting of field-effect transistor Q6 pipes；
4th step：Single-chip microcomputer controls field-effect transistor Q3 and the conducting of field-effect transistor Q2 pipes；
5th step：Single-chip microcomputer controls field-effect transistor Q5 and the conducting of field-effect transistor Q2 pipes；
6th step：Single-chip microcomputer controls field-effect transistor Q5 and the conducting of field-effect transistor Q4 pipes.
A kind of method that measurement while drilling stop valve is controlled using said apparatus, the three-phase dc reducing motor it is each mutually around
Group turns on order：
The first step：Single-chip microcomputer controls field-effect transistor Q5 and the conducting of field-effect transistor Q4 pipes；
Second step：Single-chip microcomputer controls field-effect transistor Q5 and the conducting of field-effect transistor Q2 pipes；
3rd step：Single-chip microcomputer controls field-effect transistor Q3 and the conducting of field-effect transistor Q2 pipes；
4th step：Single-chip microcomputer controls field-effect transistor Q3 and the conducting of field-effect transistor Q6 pipes；
5th step：Single-chip microcomputer controls field-effect transistor Q1 and the conducting of field-effect transistor Q6 pipes；
6th step：Single-chip microcomputer controls field-effect transistor Q1 and the conducting of field-effect transistor Q4 pipes.
Therefore, the invention has the advantages that：(1) simple in construction, cost is low；(2) the continuous pipe well in underground can either be measured
The pressure of the annular pressure of lower dynamic parameter measurement instrument and the slurry liquid of hydrophthalmia, can also measure the pressure difference value of the two；(3) adopt
Placed respectively in the introducing section of annular space and hydrophthalmia mud hydraulic coupling with quartz crystal substrate material, utilize slurry liquid in annular space hydrophthalmia
Pressure cause the change of quartz crystal substrate internal vibration frequency, to react the pressure and pressure differential of slurry liquid in annular space hydrophthalmia
Size, measurement accuracy is higher.
Brief description of the drawings
Accompanying drawing 1-1 is a kind of schematic diagram of the present invention；
Accompanying drawing 1-2 is the cylinder annular space hydrophthalmia stop valve structure schematic diagram of the present invention；
Accompanying drawing 2 is quartz crystal substrate and corresponding solid mechanical structural representation；
Accompanying drawing 3 is resonant frequency where quartz crystal substrate D by oscillating circuit schematic diagram；
Accompanying drawing 4 is oscillating circuit and its schematic equivalent circuit；
Accompanying drawing 5 is filtering schematic diagram；
Accompanying drawing 6-1 is frequency changes delta f counting module schematic diagram；
Accompanying drawing 6-2 is frequency change schematic diagram；
Accompanying drawing 7 is motor control schematic diagram；
Embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.
Embodiment：
As shown in Fig. 1-1, Fig. 1-2, the present embodiment provide with boring down-hole annular hydrophthalmia pressure and differential pressure measurement device bag
Include：It is capable of annular space hydrophthalmia pressure measxurement drill collar installation body, the fixing resonance quartz crystal substrate of pressure-bearing oil drilling pressure
Mechanical structure, three-phase dc reducing motor, motor control driving observation circuit, cylinder annular space hydrophthalmia stop valve, annular space mud lead to
Road, hydrophthalmia slurry channel, annular space hydrophthalmia pressure measurement circuitry.
Each several part major function：Motor control driving observation circuit is used for driving the rotation of three-phase dc reducing motor to drive circle
Band of column sky hydrophthalmia stop valve rotate, come cause annular space slurry channel, hydrophthalmia slurry channel separately or concurrently with cylinder annular space hydrophthalmia
Mud fluid through-hole on stop valve reaches concentric open mode or is mutually perpendicular to closed mode.Annular space slurry channel, hydrophthalmia
Slurry channel be responsible for the slurry fluid in down-hole annular and hydrophthalmia be incorporated into by centered on resonance quartz crystal substrate so structure
Into sensor on.Cylinder annular space hydrophthalmia stop valve is responsible on or off by sensor centered on resonance quartz crystal substrate
With annular space, the slurry liquid passage of hydrophthalmia.Annular space hydrophthalmia pressure measurement circuitry is responsible for measuring and preserves the annular space that is obtained by sensor
Hydrophthalmia pressure value.
Oil placed between brill down-hole annular hydrophthalmia pressure and the annular space hydrophthalmia mud introduction hole of differential pressure measurement device
Quartz crystal substrate and corresponding solid mechanical structure, its is as shown in Figure 2.Its operation principle is：Outside pressure acts on bourdon tube A
Inside, pipe A are delivered on the quartz crystal substrate supported by support beam by compression swelling, pressure by hard end face B so that quartz
Micro- deformation occurs for crystal substrates, at this moment if quartz crystal substrate is in resonant condition, then when quartz crystal substrate due to
The introducing of ambient pressure, its vibration frequency will deviate from resonant frequency after producing micro- deformation, and after strict demarcation, can obtain
Linear relationship between ambient pressure and quartz crystal substrate vibration frequency.So by measuring quartz crystal substrate vibration frequency
Reflect the variable quantity of mud hydraulic coupling relative to the knots modification can of resonant frequency.In annular space and hydrophthalmia pick-up hole
Mechanical structure is respectively two bourdon tubes A and C, and when annular space and the introducing of hydrophthalmia pressure, two bourdon tubes A and C can be produced respectively
Raw different expansions so that annular space and hydrophthalmia pressure are delivered separately to quartz crystal substrate D by bourdon tube.Quartz crystal substrate D
The difference for producing different vibration frequency variable quantities then reflects the pressure difference value of annular space hydrophthalmia slurry liquid.
Quartz crystal substrate D resonant frequency is produced by oscillating circuit, shown in its circuit diagram 3.
The circuit employs symmetrical expression multi-harmonic-oscillations scheme, and G1 and G2 are phase inverter respectively, and C1 and C2 form coupling capacitor,
RF1 and RF2 forms the feedback resistance in inverter circuit.By the resistance regulation of feedback resistance at the quiescent point of phase inverter
In its charge.When electric on circuit, the pressure difference at capacitor C1 and C2 both ends is 0.If this is the noise disturbance of circuit,
So that G1 output VOUT1 and G2 input VIN2 rapidly goes to low level, because the voltage difference at capacitor C2 both ends can not
Transition, electric capacity need the time when charging.This is that G2 output VOUT2 is high level, and electric current passes through quartz crystal substrate X1 phases
Electric capacity C1 charges so that VIN1 voltages gradually reduce, and this is that phase inverter G1 outputs VOUT1 is high level.And G2 input VIN2
Also it is high level, G2 output VOUT2 is changed into low level, and electric capacity C1 starts to discharge by quartz crystal substrate X1.So in stone
Waveform is produced on English crystal substrates.And quartz crystal substrate can be equivalent to the LRC circuits such as Fig. 4.
When it is not at vibrational state, an electric capacity C0 can be regarded as, the size of the electric capacity depends on quartz crystal base
Shape, area and the thickness of piece.When quartz crystal substrate vibrates in circuit, due to the buoyancy effect meeting of quartz crystal
Produce equivalent capacity CM, frictional dissipation resistance RM and inertia equivalent inductance LM.Therefore LM, LM and RM form string in oscillating circuit
Join LRC oscillating circuits, LM and CM cancels out each other when channel frequency reaches the LRC oscillating circuit resonant frequencies, series connection LRC electricity
Road shows as pure resistance characteristic, and resonant frequency now is：
The frequency is when quartz crystal substrate is acted on by external force F, when its resonant frequency will be by not being stressed originally
Frequency f0 become turn to f0+ Δ f, this is determined by the force-frequency effect of quartz crystal.Firmly frequency sensitivity S X is represented, its
Formula is：
The sensitivity can be decided by way of calibration experiment, i.e., under accordingly demarcation environment, to reaching resonance
The quartz crystal substrate of state applies different size of pressure F, and measures the variation delta f of its frequency simultaneously.By what is measured
The variation delta f and pressure F of frequency, quartz crystal substrate will be obtained by external force F and quartz by bringing least square method formula into
Crystal substrates frequency variation Δ f linear relationship.
Frequency measurement circuit is counted by high frequency time reference counter to measured signal, and its principle such as Fig. 6-1, Fig. 6-
Shown in 2.When reaching resonant frequency f0 quartz crystal substrate by hydrophthalmia and annular pressure, frequency shift (FS) f0+ Δs will be produced
F, the deviation frequency enter mixting circuit and quartz crystal substrate resonant frequency be mixed, and output it signal pass through it is low
Bandpass filter, frequency offset Δ f therein is filtered out to come, as shown in Figure 5.
Frequency offset Δ f signals are by the square-wave signal that signal transformation circuit output frequency is Δ f, into controller
Input capture unit.High frequency time reference counter is opened at the beginning of gate time TM is entered, when on Δ f frequency signals
Rise along when entering input capture unit, the value Δ t1 of high frequency time reference counter is captured in register and preserved, pass through
After crossing one section of gate time TM, the number NX of Δ f frequency signal rising edges recorded in register.Terminate in gate time TM
When, the value in high frequency time reference counter is recorded again, and after the seizure of Δ f signals rising edge, then during by present high frequency
Between value in reference counter preserve, and with gate time TM terminate duration and subtract each other that Δ t2 can be drawn.So as illustrated,
TM=NX*TX+ Δ t1+ Δs t2, NX*TX=TM+ Δ t2- Δ t1, Δ f=1/TX.
The measurement error of the metering system is：
Frequency measurement resolution ratio is：
Therefore it can show that gate time TM is longer, the resolution ratio of frequency measurement is higher, therefore in high-acruracy survey, Ke Yishi
When extension gate time TM.It is used in conjunction with each other in this way with two drill string shape stop valves described below, can
To draw the frequency signal value Δ f annular spaces of mud hydraulic coupling suffered by annular space and hydrophthalmia and Δ f hydrophthalmias respectively, the latter obtain annular space and
Hydrophthalmia pressure difference value Δ f.
Oil can measure annular space, hydrophthalmia pressure value respectively with down-hole annular hydrophthalmia pressure and differential pressure measurement device is bored, with
And annular space and hydrophthalmia pressure difference, it controls brushless DC speed reduction motor to rotate two cylindrical stop valves come real by control system
It is existing.There is a circular hole communicated with hydrophthalmia (the hydrophthalmia slurry channel in such as Fig. 1) inside drill collar, the circular hole is connected on one
There is the cylindrical stop valve (the cylinder annular space hydrophthalmia stop valve in such as Fig. 1) of through hole in face, and stop valve is by brushless DC speed reduction motor
Its rotation is controlled, when cylindrical stop valve rotates to the circular hole position consistency that lead to the hole site communicates with hydrophthalmia, the mud in hydrophthalmia
Slurries are pressed into the bourdon tube in the mechanical structure that placed quartz crystal substrate, the pressure of hydrophthalmia mud can be passed through into spring
In the bottom of the tube conduction such as quartz crystal substrate in resonant condition, and it is measured circuit measuring and arrives.Equally have outside drill collar
One circular hole (the annular space slurry channel in such as Fig. 1) communicated with annular space, the circular hole are connected to a cylinder for having through hole above
Shape stop valve, stop valve control its rotation by brushless DC speed reduction motor, when cylindrical stop valve rotates to lead to the hole site and ring
During the circular hole position consistency that Kongxiang leads to, the slurry liquid in annular space is pressed into the bullet in the mechanical structure that placed quartz crystal substrate
In reed pipe, the pressure of annular space mud can be entered on the quartz crystal substrate in resonant condition by bourdon tube bottom conductive, and
Measured circuit measuring arrives.And when two cylindrical stop valves being connected with hydrophthalmia and annular space while when opening, hydrophthalmia and ring
Pressure is delivered to by the slurry liquid in sky by respective bourdon tube simultaneously, on the quartz crystal substrate in resonant condition, and
Circuit measuring is measured to annular space and the pressure difference value of hydrophthalmia.
The spinning movement for two cylindrical stop valves being connected with hydrophthalmia and annular space be by brushless DC speed reduction motor,
Motor control drive circuit and optoelectronic position detect circuit to complete.DSPIC33FJ128MC804 singlechip controllers pass through
Signal from rotor-position sensor, according to certain logical program after processing, drive and some be connected with armature winding
Power switch transistor in a certain transient switching or cut-off, force and gone into circulation in the armature winding of some original no electric currents
Electric current, it is some to have the circulating direction that electric current is begun to turn off in the armature winding of electric current or changes electric current originally, so as to force stator
Magnetic state produces change." change of current " once, stator magnetic state just changes once, continuously " change of current ", will be in work gas
The rotating excitation field of a jump is produced in gap.When a certain phase of electronics winding is powered, the magnetic of the electric current and rotor permanent-magnet steel
Extremely caused magnetic pole interacts and produces torque, and driving rotor rotation, then position sensor believe rotor magnetic steel position
Number electric signal is transformed into, goes to control electronic switch circuit, so that each phase winding of stator turns in a certain order, stator phase currents
The commutation according to a certain order with the change of rotor-position.Because the conducting order of electronic switch circuit is synchronous with angle of rotor
, thus serve the effect of mechanical commutation.The 6 step courses of work of three-phase dc reducing motor are as shown in Figure 7.
The first step：When MOSFET Q1 Q4 pipes conducting, other pipes close, i.e., by power positive end → → U → V → → power supply
Negative terminal；
Second step：When MOSFET Q1 Q6 pipes conducting, other pipes close, i.e., by power positive end → → U → W → → power supply
Negative terminal；
3rd step：When MOSFET Q3 Q6 pipes conducting, other pipes close, i.e., by power positive end → → V → W → → power supply
Negative terminal；
4th step：When MOSFET Q3 Q2 pipes conducting, other pipes close, i.e., by power positive end → → V → U → → power supply
Negative terminal；
5th step：When MOSFET Q5 Q2 pipes conducting, other pipes close, i.e., by power positive end → → W → U → → power supply
Negative terminal；
6th step：When MOSFET Q5 Q4 pipes conducting, other pipes close, that is, have power positive end → → W → V → → power supply
Negative terminal；
According to from the first step to the driving of the 6th step order three-phase direct-current brushless reducing motor clockwise can be caused to rotate,
Rotated according to the driving order phase brushless DC speed reduction motor inverse clock from the 6th step to the first step.The rotation of motor drives cylinder
Shape stop valve rotates, and the slurry channel of hydrophthalmia and annular space can be closed or open, to decide whether independent measurement hydrophthalmia mud pressure
Power or annular space mud pressure, or the mud pressure difference of measurement hydrophthalmia and annular space.One luminous two is provided with drill collar body
Pole pipe, photosensitive switch pipe is installed inside the groove (the photosensitive switch mounting hole in such as Fig. 1) of cylindrical stop valve, works as cylinder
When the photosensitive switch pipe of the inside grooves installation of shape stop valve is rotated to drill collar body installation light emitting diode face position, light
Quick switching tube, which is opened to connect with the ground wire of circuit board, is changed into low level, and the low level is by DSPIC33FJ128MC804 single-chip microcomputer controls
Device processed will stop to the switch operation of phase asynchronous DC speed-reducing after detecting, existing state be kept, to pin three-phase
The present rotation position of asynchronous DC speed-reducing, that is, the cylinder being connected with phase asynchronous DC speed-reducing is locked and has cut
The only position of the opening and closing of valve.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (4)
1. a kind of cut-off control valve device for measurement while drilling, including：Stop valve, for driving subtracting for the cut-off threshold switch
Speed motor, the motor control drive circuit being connected with reducing motor, it is characterised in that the motor control drive circuit includes：
Field-effect transistor Q1 that one end is connected with single-chip microcomputer forward direction output end respectively, field-effect transistor Q3, field-effect transistor Q5；
Field-effect transistor Q2 that one end is connected with single-chip microcomputer negative sense output end respectively, field-effect transistor Q4, field-effect transistor Q6；
Wherein, one end that the field-effect transistor Q1 and field-effect transistor Q2 are connected is connected the U of reducing motor to the field-effect
Transistor Q3 is connected the V of reducing motor with field-effect transistor Q4 one end being connected to the field-effect transistor Q5 is imitated with field
Answer the W of the connected one end connection reducing motors of transistor Q6 to.
A kind of 2. cut-off control valve device for measurement while drilling according to claim 1, it is characterised in that the cut-off
Valve is a cylindrical structure, and motor drive link mounting hole is set on the end face of the cylinder, is set on the side of the cylinder
It is equipped with the through hole for opening or closing the fluid passage when cylinder is driven and rotated by motor.
3. a kind of method that device using described in claim 1 controls measurement while drilling stop valve, it is characterised in that the three-phase
Each phase winding of DC speed-reducing turns on order：
The first step：Single-chip microcomputer controls field-effect transistor Q1 and the conducting of field-effect transistor Q4 pipes；
Second step：Single-chip microcomputer controls field-effect transistor Q1 and the conducting of field-effect transistor Q6 pipes；
3rd step：Single-chip microcomputer controls field-effect transistor Q3 and the conducting of field-effect transistor Q6 pipes；
4th step：Single-chip microcomputer controls field-effect transistor Q3 and the conducting of field-effect transistor Q2 pipes；
5th step：Single-chip microcomputer controls field-effect transistor Q5 and the conducting of field-effect transistor Q2 pipes；
6th step：Single-chip microcomputer controls field-effect transistor Q5 and the conducting of field-effect transistor Q4 pipes.
4. a kind of method that device using described in claim 1 controls measurement while drilling stop valve, it is characterised in that the three-phase
Each phase winding of DC speed-reducing turns on order：
The first step：Single-chip microcomputer controls field-effect transistor Q5 and the conducting of field-effect transistor Q4 pipes；
Second step：Single-chip microcomputer controls field-effect transistor Q5 and the conducting of field-effect transistor Q2 pipes；
3rd step：Single-chip microcomputer controls field-effect transistor Q3 and the conducting of field-effect transistor Q2 pipes；
4th step：Single-chip microcomputer controls field-effect transistor Q3 and the conducting of field-effect transistor Q6 pipes；
5th step：Single-chip microcomputer controls field-effect transistor Q1 and the conducting of field-effect transistor Q6 pipes；
6th step：Single-chip microcomputer controls field-effect transistor Q1 and the conducting of field-effect transistor Q4 pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710670824.3A CN107461165A (en) | 2017-08-08 | 2017-08-08 | A kind of stop valve control device and method for measurement while drilling |
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