CN105422029B - Rotary valve valve port design method - Google Patents
Rotary valve valve port design method Download PDFInfo
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- CN105422029B CN105422029B CN201510945893.1A CN201510945893A CN105422029B CN 105422029 B CN105422029 B CN 105422029B CN 201510945893 A CN201510945893 A CN 201510945893A CN 105422029 B CN105422029 B CN 105422029B
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B47/14—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 using acoustic waves
- E21B47/18—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 using acoustic waves through the well fluid, e.g. mud pressure pulse telemetry
- E21B47/20—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 using acoustic waves through the well fluid, e.g. mud pressure pulse telemetry by modulation of mud waves, e.g. by continuous modulation
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
- G16Z99/00—Subject matter not provided for in other main groups of this subclass
Abstract
The present invention provides a kind of rotary valve valve port design method, the development for the rotary valve type drilling liquid pressure signal generator of measurement while drilling/well logging.The mathematical model of drilling hydraulic force signal is established according to the analysis of the inertial pressure of fluid unsteady flow, based on the mathematical model, establish the mathematical model of the drilling fluid continuous pressure ripple signal produced under permanent rotating speed at rotary valve valve port, the planar structure in rotary valve stator aperture and rotor aperture is calculated by mathematical analysis and numerical value, realizes the structure design of rotary valve valve port.The rotary valve valve mouth structure designed using the method for the present invention, the drilling liquid pressure signal waveform that can make to produce at rotary valve valve port under permanent rotating speed have wave propagation characteristic closer to sine wave；Since the distortion factor of pressure signal waveform is smaller, signal energy is more gathered in fundamental wave, is conducive to the modulation of measurement while drilling/well logging data and the transmission of modulated drilling fluid continuous pressure ripple signal.
Description
Technical field：
The present invention relates to a kind of design method of measurement while drilling/LWD tool during oil/gas drilling, especially relate to
A kind of and rotary valve valve port design method for drilling liquid pressure signal generator.
Background technology：
Downhole drilling/well logging (MWD/LWD) is that one kind measures and transmit in real time underground letter in drilling process
The modern drilling ancillary technique of breath.In drilling process, drilling fluid is pumped to underground by earth's surface by drill string, is sprayed from bit port
Well head is returned out upwards for the lubrication of drill bit and cooling and by the toric space of the borehole wall and drill string, and MWD/LWD instruments are installed on
In the drill collar on drill bit top, attached drawing 1 is seen.In MWD/LWD instruments, the sensor in nearly drill bit drill string obtains measurement number
Ground is transferred to according to and by drilling liquid pressure information telemetry system, information telemetry is by carrying out the drilling liquid pressure in drill string
Downhole drilling/well logging data are transmitted in modulation and pressure wave propagation in drill string.Drilling liquid pressure information telemetry
Generally use base band pressure pulse or continuous pressure ripple transmit down-hole information, and wherein continuous pressure ripple has than base band pressure arteries and veins
The down-hole information transmission rate leapt high much, is the developing direction of drilling liquid pressure telemetry.Drilling fluid continuous pressure
Ripple signal is produced by underground continuous pressure wave generator, and continuous pressure wave generator has two kinds of structures at present, by
Stator and the rotor composition relative to stator movement, unlike, one kind does one direction rotary motion for rotor relative to stator
Rotary valve structure, another kind does the shearing valve arrangement of roll motion relative to stator for rotor.Rotary valve is positioned at installation
There is the drill collar top of downhole measurement tools, drill collar is a part for drill string, close to drill bit；The stator of rotary valve and rotor plane are equal
For circle, the two is installed with one heart, and stator is fixed on drill collar inner wall, and rotor is installed on stator lower part, and drilling fluid is from stator overhead stream
Enter, flowed out from rotor lower part；For ease of rotor relative to stator rotation, root diameter is slightly smaller than stator diameter, and stator following table
Certain interval is left between face and upper rotor surface；Rotor is driven by motor, there is multiple holes of identical quantity on stator and rotor
The intersection in mouth and blade, stator and rotor aperture forms the valve opening of circulation, during rotor is relative to stator rotation, turns
Aperture on son produces movement relative to stator aperture, causes the change of valve opening circulation area, makes the drilling hydraulic on stator top
Power changes, which is transmitted with undulating manner to well head, and the upload of underground survey data can be carried out using the pressure wave.
To ensure efficiency of transmission highest of the drilling fluid continuous pressure ripple signal in drilling fluid channel, rotary valve rotor produces under permanent rotating speed
Raw drilling hydraulic force signal should be in sinusoidal variations and be used as communication carrier, be formed by measurement while drilling/well logging data
Base band pulse control rotary valve rotating speed carrys out the frequency or phase of modulated pressure carrier wave, produces energy and concentrates near carrier frequency
Drilling fluid continuous pressure ripple signal, realizes measurement while drilling/high efficiency of transmission of the well logging data in drilling fluid channel.It is if permanent
The sinusoidal pressure waveform that rotary valve produces under rotating speed can not only result in load there are obvious distortion there are substantial amounts of higher hamonic wave
The fundamental wave energy for being used for signal modulation and signal transmission in ripple reduces, and modulated signal waveform can be made to produce distortion, no
Beneficial to the transmission, detection and processing of signal, therefore the mistake of the sine pressure wave that rotary valve produces under permanent rotating speed should be reduced as far as possible
True degree.It is in sinusoidal variations to make the drilling hydraulic force signal that rotary valve produces at permanent rotating speed lower valve port, and reasonable design rotates
Valve valve mouth structure (stator and the plane geometric shape and size in rotor aperture) is very necessary.The structure design of rotary valve valve port is
Based on the mathematical model of drilling hydraulic Reeb, which should establish according to the mechanism of production of drilling hydraulic Reeb,
The more documents such as the mechanism of production in relation to drilling hydraulic Reeb, SPE25356,27516 point out be fluid unsteady flow water
Hammer pressure jump caused by (water attack) effect into shape, this pressure change has the characteristic of wave propagation；But surge pressure expression formula is only
It can reflect that valve port closes the pressure jump phenomenon of generation suddenly, the control for closing the fluid motions such as valve speed, valve mouth structure can not be embodied
Influence of the body parameter processed to unsteady flow pressure, therefore surge pressure is not particularly suited for the mathematical description of drilling hydraulic force signal.
In relation to rotary valve valve port design, United States Patent (USP) U.S.Pat.No.5237540,5586083,5636178,5787052,
6970398th, 7327634,7468679, document SPE67762 etc. gives a variety of valve mouth structures, but undeclared valve port design
Theoretical foundation and design method, United States Patent (USP) U.S.Pat.No.4847815 describe a kind of valve mouth structure, briefly describe valve
The influence of hole circulation area, mud flow rate and density to pressure signal amplitude and waveform, and setting in this, as valve mouth structure
Foundation is counted, the waveform distortion of the pressure signal produced under the rotary valve perseverance rotating speed of the valve mouth structure is 21%, but the document is retouched
The pressure signal mathematical model stated is the pressure loss produced during fluid stable flowing at valve opening, due to the pressure loss not
With wave propagation characteristic, therefore there are larger query for its rotary valve valve mouth structure for providing.Therefore, how according to drilling hydraulic
The mechanism of production of Reeb carrys out the correct mathematical model for establishing drilling hydraulic force signal, how the mathematics based on drilling hydraulic force signal
The structure design of model realization rotary valve valve port, the prior art can not provide effective solution method and solution approach.
The content of the invention：
The technical problems to be solved by the invention are to provide a kind of method of rotary valve valve port design.
The technical problems to be solved by the invention are realized by following technical scheme：
1. the mathematical model of drilling hydraulic force signal is established according to the fluid inertia Pressure Analysis of unsteady flow
Analyzed according to the Bernoulli equation of unsteady flow, the valve opening of rotary valve is in closing process except that can produce valve opening section
Stream loss, can also produce fluid inertia pressure, the pressure that kinetic energy is converted into when fluid inertia pressure is stopped for fluid by rotor blade
Power potential energy, has wave propagation characteristic.When rotary valve works, rotor is with certain speed relative to stator rotation, rotor blade week
The drilling fluid for flowing through stator aperture is blocked to phase property, fluid inertia pressure is produced at valve port, which is drilling fluid
Pressure signal, can be expressed as
Wherein, L is the length in valve port top unsteady flow region；ρ is drilling fluid density；For valve opening flow velocity；Q
For mud flow rate；AV(t)=A0-As(t)+Aδ(t) it is the actual internal area of valve opening, reflects the architectural feature of rotary valve valve port；
A0For valve opening standard-sized sheet when actual internal area；As(t) it is that sectional area is blocked to stator aperture in rotor blade rotary course；Aδ
(t) it is that the equivalent leak cross-section produced in rotor rotation process by stator and rotor gap accumulates.
When rotary valve works, drilling fluid is flowed into from stator top, is flowed out from rotor lower part, for ease of rotor relative to stator
Rotate, certain interval is left between stator lower surface and upper rotor surface；In addition, contain certain powdery solid in drilling fluid
Component, is known as solid phase, if gap very little between stator and rotor, solid phase can settle in gap to be resident, in rotor motion
Produce frictional resistance, so as to hinder the normal rotation of rotor, to avoid solid phase resident in gap, usual stator and rotor it
Between to keep the gap of 3mm or so, in favor of washing away for drilling fluid.Due to the presence in stator and rotor gap, a part of drilling well can be made
Liquid is not flowed through directly by clearance leakage to rotor lower part from valve opening, and the drilling fluid leakage thus brought is cut with equivalent leakage
Cartographic represenation of area.
According to formula (1), Derivative Operation is carried out to valve opening flow velocity, the mathematical model of drilling hydraulic force signal can be established
Wherein,Change with time rate to block sectional area, reflect the valve opening closing velocity of rotary valve；
The equivalent leak cross-section that gap produces between stator and rotor changes with time rate, reflects drilling fluid letting out from stator and rotor gap
Leak speed.
Formula (2) points out, amplitude and mud flow rate, density, the valve port top unsteady flow region of drilling hydraulic force signal
Length, valve mouth structure, to close the speed that valve speed and drilling fluid are leaked by stator with rotor clearance etc. related.Formula (2) embodies
Influence of the control volume parameter of the fluid motions such as valve speed, valve mouth structure to unsteady flow pressure is closed, can relatively accurately be expressed
The unsteady flow pressure change produced in rotary valve valve opening change procedure.
2. the rotary valve valve mouth structure design based on fluid inertia Pressure Analysis
To ensure efficiency of transmission highest of the drilling fluid continuous pressure ripple signal in drilling fluid channel, rotary valve rotor is in perseverance
The drilling hydraulic force signal produced under rotating speed should be in SIN function, if sinusoidal signal angular frequency is ω, amplitude pm, by formula (2)
The mathematical model that can obtain under permanent rotating speed the drilling fluid continuous pressure ripple signal produced at rotary valve valve port is
Since rotation stator valve and rotor are all circular, its planar structure can be represented with polar coordinates, when rotor is opposite
When stator rotates, the rotation angle θ of rotor is the polar central angle of stator.If the mechanical angular frequency of rotor is Ω, stator
Or the aperture number of rotor is q, since the pressure signal phase angle ω t and the relation of the rotor anglec of rotation that are produced under rotor perseverance rotating speed are ω
T=q θ, the excursion of the anglec of rotation is during valve is closedIn view of in formula (3)Item very little, ignores
It is influenced, then formula (3) can be expressed as
Wherein, k is the coefficient related with unsteady flow zone length.Formula (4) obtains rotor blade after abbreviation and arrangement
The mathematic(al) representation of sectional area is blocked to stator aperture
Wherein, AδThe equivalent leak cross-section for being valve opening when fully closed product.
The target of rotary valve valve mouth structure design is to determine out stator and the plane geometric shape and size in rotor aperture, if
Meter step is divided into 2 steps, and the first step first designs stator orifice structure (plane geometric shape and size), and second step determines rotor
Orifice structure.
(1) stator orifice structure designs
The structure design in stator aperture realizes in valve opening closing process, will be set as first on the right of rotor blade and stator
The straight line that round radial line overlaps, when rotor blade rotates counterclockwise, the gradual inswept stator aperture in the side, make rotor blade by
Gradually shelter from stator aperture, the area that stator aperture is blocked gradually increases with rotation angle, valve opening circulation area by maximum by
Decrescence small, until stator aperture is blocked completely by rotor blade, in this course, stator aperture is by the shielding surface of rotor blade
Product should follow the mathematic(al) representation of formula (5).
In rotary valve valve port closing process, rotor blade rotates and with angle counterclockwiseComplete inswept stator hole
Mouthful, rotary valve valve opening actual internal area is changed by being up to minimum, and pressure signal amplitude reaches maximum by minimum, before generation
The sinusoidal pressure signal of half period.
Sub- radius is set as riIf rotor radius is r1, stator axle sleeve radius is ra, the polar coordinates function in stator aperture is r
(θ), under polar coordinates, establishes the sectional area infinitesimal blocked by rotor blade in stator aperture by mathematical analysis and to carry out sectional area micro-
The integration of member, obtaining the sectional area that stator aperture is blocked by rotor blade in valve opening closing process is
Make formula (5) equal with formula (6) and arrange, obtain the polar coordinates function in stator aperture
Numerical computations are carried out to formula (7) and do the curve map under polar coordinates, the plane in rotary valve stator aperture can be obtained
Geometry and size.Calculated according to formula (7), there are a minimum r for the polar coordinates function in stator aperturemin, which corresponds to fixed
The vertex of sub-aperture mouth curve map, and should have rmin＞ ra, polar value r (the 0)=r in stator aperture during due to rotation angle θ=0i,
The polar value in stator aperture during rotation angle θ=π/qTherefore the plane geometric shape in stator aperture is curl
Triangle is fan-shaped, and for fan-shaped arc-shaped edges in stator circumference, arc length is stator circumference length divided by 2 times of aperture number.
(2) rotor orifice structure designs
The structure design in rotor aperture is realized in valve opening opening procedure.The rotor anglec of rotation existsThe valve opening of change
During, rotor blade is gradually reduced the sectional area that blocks in stator aperture, and the actual internal area of valve opening gradually increases, pressure by
Gradually reduce；According to symmetrical analysis, actual internal area blocks change of the sectional area with corner when should be with closing valve with the change rate of corner
Rate is identical just to make the second half of the cycle of pressure signal also be in sinusoidal variations.Analyzed by formula (4), pressure signal amplitude is with blocking
Sectional area changes with time rateIt is in a linear relationship, since valve opening actual internal area is AV(t)=A0-As(t)+Aδ
(t), then haveIgnoreInfluence, haveWherein negative value generation
Table causes pressure to decline, i.e., valve opening actual internal area is identical with the absolute value of corner change rate with blocking sectional area, illustrates valve opening
When actual internal area with the change rate of corner with closing valve when block sectional area and meet symmetry with the change rate of corner, therefore opening
During valve, Ke YiyongTo replace formula (4), then the pressure that rotary valve valve port produces during valve opening
Signal can be expressed as
Therefore, as long as the left side of rotor blade is also set to overlap with the radial line of stator circle, then during valve opening,
Its pressure change produced also complies with the changing rule of SIN function.
Since the left side of rotor blade is overlapped with the radial line that stator is justified, i.e., the side of the left and right of rotor blade two is mutually opposite
Claim, it is hereby achieved that the planar structure in rotary valve rotor aperture is fan-shaped for four sides, wherein orthodrome side in rotor circumference,
Arc length is rotor circumference length divided by 2 times of aperture number, and small arc-shaped side radius is the polar minimum r in stator aperturemin,
Remaining both sides is overlapped with the radial line of rotor.
The beneficial effects of the invention are as follows：The rotary valve valve mouth structure designed using method provided by the present invention, can make
The drilling liquid pressure signal waveform produced under permanent rotating speed at rotary valve valve port has wave propagation spy closer to sine wave
Property.Since the distortion factor of pressure signal waveform is smaller, signal energy is more gathered in fundamental wave, be conducive to measurement while drilling/with bore survey
The modulation of well data and the transmission of modulated drilling fluid continuous pressure ripple signal.
Brief description of the drawings：
Fig. 1 is to include measurement while drilling/LWD tool and the generation of drilling fluid continuous pressure ripple signal in the prior art
The drilling rig schematic diagram of device.
Fig. 2 is the structure diagram of rotary valve in the present invention.
Fig. 3 is the plane structure chart of the 4 aperture rotary valve stator apertures and blade obtained in the present invention by numerical computations.
Fig. 4 is the plane structure chart of the 4 aperture rotary valve rotor apertures and blade obtained in the present invention by numerical computations.
Fig. 5 is rotary valve designed by the invention, the simulation waveform of the drilling hydraulic force signal produced under permanent rotating speed.
Fig. 6 is rotary valve designed by the invention, the frequency spectrum of the drilling liquid pressure emulation signal produced under permanent rotating speed
Figure.
Fig. 7 is the computer design program block diagram of the present invention.
In figure：1- drilling fluids, 2- ground, 3- drill strings, 4- drilling fluid pumps, 5- drill bits, 6- annular spaces, 7- stratum, 8- are bored
Well parameter and formation parameter measuring device, 9- drilling fluid continuous pressures wave generator, 10- pressure sensors, at 11- signals
Between managing between device, 12- drill collars, 13- drilling fluid tanks, 14- stators, 15- rotors, 16- stators lower surface and upper rotor surface
Gap, 17- armature spindles, 18- stators aperture, 19- stator vanes, 20- stators axle sleeve, 21- rotors aperture, 22- rotor blades.
Embodiment：
Further describe the present invention with reference to the accompanying drawings and examples.
It is that existing measurement while drilling/LWD tool and the drilling fluid continuous pressure ripple signal of including occurs shown in Fig. 1
The drilling rig of device.In drill string 3 of the drilling fluid 1 by the injection drilling of drilling fluid pump 4 stratum 7 on ground 2 in drilling fluid tank 13,
The drill bit 5 of 3 bottom of drill string is reached, is back to ground by the annular space 6 between drill string 3 and stratum 7 after bit port outflow
Face 2, arrow represent the flow path of drilling fluid.
Instrument is placed in drill string 3 in the drill collar 12 of drill bit 5, drill collar top jointed rod forms drill string, whole drill string
Apply enough the pressure of the drill to drill bit 5 to be used to creep into stratum 7.Instrument in drill collar 12 includes drilling parameter and formation parameter measurement dress
8 are put to be used to monitor drill-well operation and assess the physical characteristic on stratum.
In order to produce pressure oscillation in drilling fluid and transmit downhole data by drilling fluid, by drilling fluid continuous pressure ripple
Signal generator 9 is installed on the top of drill collar 12, and drilling hydraulic force signal is uploaded to ground by drill string, by pressure sensor
10 detect and are sent into the progress signal processing of signal processing apparatus 11.
Drilling fluid continuous pressure wave generator 9 is rotary valve type drilling liquid pressure signal generator, and rotary valve is by fixed
Son 14 and rotor 15 form, and stator and rotor plane are circle, and stator is fixed on the inner wall of drill collar 12, and stator is pacified with rotor coaxial
Dress, rotor are installed on the lower part of stator, and armature spindle 17 is installed in stator axle sleeve 20, and armature spindle is driven by motor, is had on stator
The more than one and stator aperture 18 with identical physical dimension and the stator vane 19 with identical physical dimension, have on rotor
The more than one and rotor aperture 21 with identical physical dimension and the rotor blade 22 with identical physical dimension, stator is with turning
Aperture number on son is identical, and for ease of rotor relative to stator rotation, root diameter is slightly smaller than stator diameter, and stator following table
Certain gap 16 is left between face and upper rotor surface.The intersection in stator aperture and rotor aperture forms the valve of circulation
Hole, drilling fluid 1 are flowed into from the top of stator, are flowed out by valve opening from the lower part of rotor；Rotor is relative to stator rotation process
In, the aperture on rotor produces movement relative to stator aperture, causes the change of valve opening circulation area, makes the drilling well on stator top
Hydraulic coupling amplitude changes, which is transmitted with undulating manner to well head；Produced with rotary valve rotor constant rotational speed lower valve port
Sine pressure wave as pressure carrier wave, pass through the measurement data of drilling parameter and formation parameter measuring device 8 and change rotary valve
The rotating speed of rotor is changed into drilling fluid continuous pressure ripple signal to modulate the frequency of drilling liquid pressure carrier wave or phase, realizes that underground is surveyed
Measure the upload of data.
A kind of rotary valve type drilling liquid pressure signal generator for measurement while drilling/well logging proposed by the invention
Rotary valve valve port design method, realized by following technical scheme：
The first step first carries out stator hole mouth structure design, and second step carries out rotor orifice structure design.The knot in stator aperture
Structure design is realized in valve opening closing process, will be set as overlapping with the radial line of stator circle first on the right of rotor blade straight
Line, when rotor blade rotates counterclockwise, the gradual inswept stator aperture in the side, makes rotor blade gradually shelter from stator aperture,
The area that stator aperture is blocked should follow the mathematic(al) representation of formula (5) with the changing rule of rotation angle；Applied under polar coordinates
Mathematical analysis establishes the sectional area infinitesimal that stator aperture is blocked by rotor blade and carries out the integration of sectional area infinitesimal, obtains formula
(6) sectional area that the stator aperture represented is blocked by rotor blade；Make formula (5) equal with formula (6) and arrange and obtain formula (7) expression
Stator aperture polar coordinates function, the planar structure in stator aperture is described with the curve map of polar coordinates function；According to formula (7)
The plane geometric shape in the stator aperture being calculated is fan-shaped for curl triangle, and a vertex of triangle sector is stator aperture pole
The minimum of coordinate function, for the arc-shaped edges of triangle sector in stator circumference, arc length is stator circumference length divided by 2 times of hole
Mouth number.The structure design in rotor aperture realizes in valve opening opening procedure, and valve opening actual internal area during according to valve opening is with corner
Change rate sectional area is blocked when should be with closing valve with the identical symmetrical analysis of the change rate of corner, determine the left side of rotor blade
Also the radial line with stator circle overlaps, and the plane geometric shape for thus obtaining rotary valve rotor aperture is four sides sector, wherein greatly
Arc-shaped edges are in rotor circumference, and arc length is rotor circumference length divided by 2 times of aperture number, and small arc-shaped side radius is stator aperture
The minimum of polar coordinates function, remaining both sides are overlapped with the radial line of rotor.
Referring to the drawings 1, the measurement data that 12 Instrumental of drill collar obtains, passes through drilling fluid continuous pressure wave generator 9
Carry out data modulation and be changed into drilling fluid continuous pressure ripple signal transmission to ground, drilling fluid continuous pressure wave generator is revolves
Rotary valve drilling liquid pressure signal generator, the valve mouth structure of rotary valve design rotary valve valve port design side using the present invention
Method.
Fig. 2 is the structure diagram of rotary valve in the present invention, and rotary valve is made of stator and rotor, stator and rotor plane
For circle, stator is fixed on drill collar inner wall, and stator is installed with rotor coaxial, and rotor is installed on the lower part of stator, armature spindle installation
In stator axle sleeve, armature spindle is driven by motor, and certain interval, stator aperture are left between stator lower surface and upper rotor surface
There is the planar structure shown in Fig. 3 with stator vane, rotor aperture and rotor blade have the planar structure shown in Fig. 4.
Fig. 3 is the plane structure chart of the 4 aperture rotary valve stator apertures and blade obtained in the present invention by numerical computations,
Fig. 4 is the plane structure chart of the 4 aperture rotary valve rotor apertures and blade obtained in the present invention by numerical computations, design condition
For：Stator diameter 100mm, stator sleeve diameter 26mm, root diameter 99mm, mud flow rate 10L/s, drilling fluid density
1200kg/m3, valve opening maximum flow sectional area 1600mm2, drilling fluid maximum equivalent leak cross-section product 900mm2。
Fig. 5 be using the present invention designed by rotary valve, the emulation ripple of the drilling hydraulic force signal produced under permanent rotating speed
Shape, simulated conditions are：Gap is 2.5mm between stator and rotor, drilling fluid viscosity 10mPas, the rotor speed of rotary valve
For 5r/s；Rotor rotates 2 weeks sinusoidal pressure signals for producing 8 cycles, signal frequency 20Hz.
Fig. 6 is rotary valve designed by the invention, the frequency spectrum of the drilling liquid pressure emulation signal produced under permanent rotating speed
Figure, pressure signal is approximate sinusoidal waveform, and the first harmonic magnitude that frequency is 20Hz is 100, and the amplitude of higher hamonic wave is with fundamental wave width
Subject to degree, signal distortion 18.7%.
Fig. 7 is the computer design program block diagram of the present invention, first according to given equivalent leak cross-section product, fixed in program
Sub- radius, rotor radius, stator axle sleeve radius, stator or rotor aperture number, valve opening standard-sized sheet when actual internal area initial value, meter
The polar coordinates function in stator aperture is calculated, searches the minimum of polar coordinates function, judges whether minimum is more than given stator axis
Radius is covered, reduces flow area product value during valve opening standard-sized sheet if condition is unsatisfactory for, recalculates the polar coordinates in stator aperture
Function, and judge whether minimum is more than stator axle sleeve radius, in cycles untill meeting Rule of judgment；If satisfaction is sentenced
Broken strip part, it is determined that flow area product value during valve opening standard-sized sheet, calculates the polar coordinates function in stator aperture, searches polar coordinates function
Minimum, draw the polar curve in stator aperture, obtain the planar structure in stator aperture；According to stator aperture polar coordinates letter
Several minimums and rotor radius, draws the polar curve in rotor aperture, obtains the planar structure in rotor aperture.
Claims (1)
1. a kind of rotary valve valve port design method, including the structure design in rotor aperture and the structure design in stator aperture, it is special
Sign is to realize according to the following steps：
(1) the inertial pressure analysis foundation formula based on fluid unsteady flow
The drilling hydraulic force signal mathematical model of expression, wherein, piFor drilling hydraulic force signal, L is valve port top unsteady flow area
The length in domain, ρ are drilling fluid density, and Q is mud flow rate, A0For valve opening standard-sized sheet when actual internal area, As(t) it is rotor leaf
To the sectional area that blocks in stator aperture, A in piece rotary courseδ(t) it is to be produced in rotor blade rotary course by stator and rotor gap
Equivalent leak cross-section product,Change with time rate to block sectional area,Gap produces between stator and rotor
Equivalent leak cross-section change with time rate, based on the mathematical model, establish formula
The drilling fluid continuous pressure ripple signal mathematical model produced at the rotary valve perseverance rotating speed lower valve port of expression, wherein, ω is just
String signal angular frequency, pmFor pressure signal amplitude；
(2) according to the relation between pressure signal phase angle and the rotor anglec of rotation under rotary valve perseverance rotating speed, by pressure signal with the time
The expression formula of change is converted to formula
The expression formula changed with angle of rotor represented, wherein, k is the coefficient related with unsteady flow zone length, and θ is rotor
The anglec of rotation, Ω are rotor machinery angular frequency, and q is the aperture number of stator or rotor, AδThe equivalent leak cross-section for being valve opening when fully closed product,
Obtain formula
The sectional area that stator aperture is blocked by rotor blade during the rotor rotation of expression；
(3) applied mathematics is analyzed under polar coordinates, establishes the section that stator aperture is blocked by rotor blade in valve opening closing process
Product infinitesimal simultaneously carries out the integration of unit dimension, obtains formula
The sectional area that the stator aperture of expression is blocked by rotor blade, wherein, riFor stator radius, r (θ) is the pole in stator aperture
Coordinate function；
(4) formula in step (3) is arranged to obtain formula
The polar coordinates function in the stator aperture of expression, the planar structure in stator aperture is described with the curve map of polar coordinates function；
Fan-shaped for curl triangle according to the plane geometric shape in the stator aperture being calculated, a vertex of triangle sector is stator hole
The minimum of mouth polar coordinates function, for the arc-shaped edges of triangle sector in stator circumference, arc length is stator circumference length divided by 2 times
Aperture number；
(5) structure design in rotor aperture is realized in valve opening opening procedure, and valve opening actual internal area during according to valve opening is with turning
Sectional area is blocked when the change rate at angle is with closing valve with the identical symmetrical analysis of the change rate of corner, determines the left side of rotor blade
Also the radial line with stator circle overlaps, and the planar structure for thus obtaining rotary valve rotor aperture is four sides sector, wherein orthodrome
While in rotor circumference, arc length is rotor circumference length divided by 2 times of aperture number, and small arc-shaped side radius is that stator aperture pole is sat
The minimum of scalar functions, remaining both sides are overlapped with the radial line of rotor.
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| CN201510945893.1A CN105422029B (en) | 2015-12-17 | 2015-12-17 | Rotary valve valve port design method |
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| CN201510945893.1A CN105422029B (en) | 2015-12-17 | 2015-12-17 | Rotary valve valve port design method |
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| CN105422029B true CN105422029B (en) | 2018-05-15 |
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| RU2786461C1 (en) * | 2020-05-28 | 2022-12-21 | Чайна Ойлфилд Сервисез Лимитед | Method and device for controlling a hydropulse generator, and a method for determining the equation that controls the rotation of the hydropulse generator rotor |
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| CN107795317B (en) * | 2017-10-24 | 2020-11-10 | 中国石油大学(华东) | Rotary valve rotating speed control method of measurement while drilling tool |
| CN109339770B (en) * | 2018-09-29 | 2020-08-04 | 中国石油大学(华东) | Design method for end face structures of stator and rotor of oscillating shear valve and oscillating shear valve |
| CN111691877B (en) * | 2020-05-28 | 2022-05-03 | 中海油田服务股份有限公司 | Control method and device of slurry pulse generator and readable storage medium |
| CN114722513A (en) * | 2021-03-02 | 2022-07-08 | 中国石油大学(华东) | Method for designing valve port structure of continuous wave generator oscillation shear valve and oscillation shear valve |
| CN113737555A (en) * | 2021-09-04 | 2021-12-03 | 东北石油大学 | Novel high-efficient pulper waste paper board system of smashing |
| CN115898382A (en) * | 2021-09-30 | 2023-04-04 | 中国石油化工股份有限公司 | Mud pulse generating system based on two-way communication |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4785300A (en) * | 1983-10-24 | 1988-11-15 | Schlumberger Technology Corporation | Pressure pulse generator |
| US4847815A (en) * | 1987-09-22 | 1989-07-11 | Anadrill, Inc. | Sinusoidal pressure pulse generator for measurement while drilling tool |
| US6219301B1 (en) * | 1997-11-18 | 2001-04-17 | Schlumberger Technology Corporation | Pressure pulse generator for measurement-while-drilling systems which produces high signal strength and exhibits high resistance to jamming |
| CN101949287A (en) * | 2010-07-30 | 2011-01-19 | 中国石油大学(华东) | Method and device for modulating underground measurement while drilling data based on drilling fluid continuous pressure wave technology |
| CN201826833U (en) * | 2010-11-01 | 2011-05-11 | 中国石油集团钻井工程技术研究院 | Shunting type rotary valve for continuous wave pressure pulse generator |
| CN103696763A (en) * | 2013-12-29 | 2014-04-02 | 中国石油集团渤海钻探工程有限公司 | Continuous wave generator rotary valve based on triangular valve body |
| CN204402356U (en) * | 2014-12-26 | 2015-06-17 | 中石化胜利石油工程有限公司钻井工艺研究院 | A kind of waterpower pulse generating means of adjustable amplitude |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8485264B2 (en) * | 2009-03-12 | 2013-07-16 | Schlumberger Technology Corporation | Multi-stage modulator |
-
2015
- 2015-12-17 CN CN201510945893.1A patent/CN105422029B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4785300A (en) * | 1983-10-24 | 1988-11-15 | Schlumberger Technology Corporation | Pressure pulse generator |
| US4847815A (en) * | 1987-09-22 | 1989-07-11 | Anadrill, Inc. | Sinusoidal pressure pulse generator for measurement while drilling tool |
| US6219301B1 (en) * | 1997-11-18 | 2001-04-17 | Schlumberger Technology Corporation | Pressure pulse generator for measurement-while-drilling systems which produces high signal strength and exhibits high resistance to jamming |
| CN101949287A (en) * | 2010-07-30 | 2011-01-19 | 中国石油大学(华东) | Method and device for modulating underground measurement while drilling data based on drilling fluid continuous pressure wave technology |
| CN201826833U (en) * | 2010-11-01 | 2011-05-11 | 中国石油集团钻井工程技术研究院 | Shunting type rotary valve for continuous wave pressure pulse generator |
| CN103696763A (en) * | 2013-12-29 | 2014-04-02 | 中国石油集团渤海钻探工程有限公司 | Continuous wave generator rotary valve based on triangular valve body |
| CN204402356U (en) * | 2014-12-26 | 2015-06-17 | 中石化胜利石油工程有限公司钻井工艺研究院 | A kind of waterpower pulse generating means of adjustable amplitude |
Non-Patent Citations (2)
| Title |
|---|
| 钻井液连续波信号发生器转阀水力转矩分析;贾朋 等;《中国石油大学学报（自然科学版）》;20100220;第34卷(第1期);全文 * |
| 钻井液连续波发生器转阀设计与信号特性分析;贾朋 等;《石油机械》;20100210;第38卷(第2期);全文 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2786461C1 (en) * | 2020-05-28 | 2022-12-21 | Чайна Ойлфилд Сервисез Лимитед | Method and device for controlling a hydropulse generator, and a method for determining the equation that controls the rotation of the hydropulse generator rotor |
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