CN204694588U - There is the online bilateral instrument of high precision petroleum viscosity of feeding function - Google Patents
There is the online bilateral instrument of high precision petroleum viscosity of feeding function Download PDFInfo
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- CN204694588U CN204694588U CN201520274974.9U CN201520274974U CN204694588U CN 204694588 U CN204694588 U CN 204694588U CN 201520274974 U CN201520274974 U CN 201520274974U CN 204694588 U CN204694588 U CN 204694588U
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Abstract
The utility model discloses a kind of online bilateral instrument of high precision petroleum viscosity with feeding function, comprise drive link, the bottom of described drive link is connected with drill bit, the other end and the drilling well drive unit of drive link are in transmission connection, described drill bit is connected with drive link by transiting rod, described drive link is provided with cavity A and cavity B from bottom to top successively, described cavity A is located at the bottom of drive link, the top of described cavity A is in communication with the outside, the plate upper surface of cavity A is provided with temperature control layer, the inwall of described cavity A is positioned at and is provided with filter screen with external connectivity part, the micro-formula viscosity meter that shakes of moment of torsion is provided with in cavity A, rotational viscosimeter is provided with in described cavity B, transiting rod is provided with gets oilhole, get oily piston and get oilhole and be communicated with.From said structure, micro-for moment of torsion formula viscosity meter and rotational viscosimeter of shaking is located in the drive link of drill bit by the utility model, is convenient in drilling well prospect pit simultaneously, directly record the viscosity of oil in oilbearing stratum, judge whether the oil of this oil reservoir is applicable to exploitation thus, and sample.
Description
Technical field
The utility model relates to petroleum drilling monitoring field, is specifically related to a kind of online bilateral instrument of high precision petroleum viscosity with feeding function.
Background technology
When drilling well, once after visiting oil reservoir, need to detect the viscosity of oil reservoir, one determines whether the oil of this oil reservoir is applicable to exploitation.And after current most of drilling well, after being all on-the-spot Quyang for the detection of oil viscosity, being transported to laboratory detects, and this mode not only efficiency is lower, extends rig time, adds labour intensity.So carrying out on-line measurement oil viscosity in drilling well is developing direction simultaneously.
Abroad start to walk comparatively early in oil viscosity on-line measurement, but less about the related data of mature technology, mainly due to such technical relation country lifeblood, therefore there is blockade on new techniques.According to showing by inspection information, mainly contain following achievement in research:
The CAS type in-line viscometer of Cambridge research institute of U.S. development, adopt stainless steel piston A, in fluid to be measured (<2mL) in small-sized measurement chamber, driven by electromagnetic force and carry out linear reciprocal motion, collocation special circuit system and fluid temperature monitoring modular, obtaining the front and back working time of piston A based on electromagnetic induction effect, realize the measurement to viscosity, precision can reach ± and 1%.The method has low cost, miniaturization, precision advantages of higher, but need change specific dimensions piston A when measuring different range, and often kind of piston A measurable process is less, is not suitable for the downhole petroleum that range of viscosities is larger; Further, in order to ensure the normal to-and-fro movement of piston A, require that particle largest diameter must not more than 25 μm, and oil endoparticle thing is generally greater than 100 μm; In addition, gauge head and instrument container adopt 4.57m standard cable to be connected, and cannot realize down-hole long range propagation; Meanwhile, require to use special solution to soak and clean and maintenance gauge head, otherwise viscose glue can occur.As can be seen here, measure for line oil, CAS type in-line viscometer does not still possess application conditions.
Marimex research institute of Germany proposes the micro-formula of shaking of a kind of moment of torsion (being called for short: torsional oscillation formula) Viscosity Measurement Methods, and forms series of products.The method adopts forced vibration formula measuring principle, the torsional mode driving permanent magnetism beam to produce certain frequency by solenoid vibrates, by the sensing probe that vibration passing extremely contacts with fluid by transmission shaft, because the viscous loss of sensing probe under different viscosities liquid is different, can have an impact to its amplitude, for the amplitude making gauge head remain constant, then need to be controlled solenoid driving force.Now, create corresponding relation between the electric parameter that supplements and liquid viscosity, by founding mathematical models, then can accurately calculate liquid viscosity value.It is simple that the method has structure, and isolation is good, is easy to the features such as maintenance, and can realize larger range, existing practical application in some industry spot.But the method is for downhole petroleum on-line measurement still Shortcomings.First, what install in sensing probe is still electric class component for measuring the sensor of amplitude, cannot normally work under the environment temperature more than 100 DEG C, and with under electromagnetic interference environment, and during the long distance communication in down-hole, also comparatively serious on the impact of electric class signal; In addition, owing to itself have employed vibration-type principle, the vibration that therefore external mechanical devices (as ram pump) produces can produce considerable influence equally to its measurement, even cannot obtain measurement data time serious.In a word, existing torsional oscillation formula measuring principle and product are applied under rugged surroundings at the scene and still be there are problems.
Domestic aspect, early stage achievement in research focuses on downhole oil fluid viscosity numerical simulation and estimation mostly, as the multi-model Modeling Method based on Fuzzy c-Means Clustering Algorithm combines with radial basis function neural network by Sun, establish the soft sensing model of viscosity in rubber mixing process control, achieve good effect, but the method needs great amount of samples data to carry out network training, to weighting coefficient and choosing of fuzzy membership function, also there is certain subjectivity; Chen adopts support vector machine method to establish the increment soft-sensing model of PET conglutination, and further study the allowable error of support vector machine, and kernel function is on the impact of its modeling, but because support vector machine is a kind of learning method based on sample equally, therefore the selection of training sample and kernel function affects larger on measuring accuracy.
In recent years, research about viscosity measurement develops towards practical field gradually, as the viscosity measuring instrument based on supersonic sensing principle that Du proposes, viscosity can be measured in the solid state, simplify viscosity measuring process, have that volume is little, quality is light and measure the features such as rapid, successful operation is in polyester slice inspection, but affect by ultrasonic blind zone, the method precision in specific range ability is not high, and requiring higher to the installation accuracy of ultrasonic sensor, external mechanical vibrations is comparatively large on its impact, need discussion at oil field measurement effect; By the online liquid viscosity instrument of Shenzhen first ripple science and technology development, achieve the On-Line Dynamic Monitoring of lubricating oil viscosity, resolution can reach 0.5cP, response time is less than 2 seconds, but because this equipment adopts piezoelectric sensor as Sensitive Apparatus, require higher to driving power, and the low-viscosity (mobile) liquid (<500cp) under being only applicable to normal pressure, the measurement demand of on-the-spot oil cannot be met.
But in the process of actual on-line measurement oil viscosity, also can run into various problems, wherein topmost one is exactly the impact of temperature, and stone oil viscosity can change along with the change of temperature; Another one is exactly that when drilling well, also the impurity that can fall in soil layer brings oil reservoir into, and these particulates and impurity can impact the measuring accuracy of oil viscosity containing particulate in the oil in oil reservoir.
Summary of the invention
The purpose of this utility model is: overcome the deficiencies in the prior art, a kind of online bilateral instrument of high precision petroleum viscosity with feeding function is provided, by micro-for moment of torsion formula viscosity meter and rotational viscosimeter of shaking is located in the drive link of drill bit, be convenient to staff while drilling well prospect pit, directly can record the viscosity of oil in oilbearing stratum, directly can judge whether the oil of this oil reservoir is applicable to exploitation thus, if judge to be applicable to exploitation, then sample by getting oily piston, reduce the labour intensity of staff, improve production efficiency; Drill bit continues after entering oil reservoir to bore a period of time downwards, oil serves the effect of cooling drill bit, and moment of torsion is micro-, and shake formula viscosity meter and the higher drill bit of temperature has a segment distance, measured oil affects less by temperature of diamond bit, by the effect of the temperature sensor bottom gauge head and temperature control layer, make survey be the temperature that has in specialized range, ensure the accuracy of measurement effect;
Vibration measuring is carried out by Fiber Bragg Grating FBG, not only can avoid occurring that electrical sensor that traditional torsional oscillation formula viscosity meter adopts is as vibration-sensitive device, the impact of the factor such as electromagnetic interference (EMI), High Temperature High Pressure is subject in petroleum collection on-the-spot meeting, the phenomenon of measuring accuracy cannot be ensured, and by the effect of Fiber Bragg Grating FBG, controller is fed back, makes controller provide drive coil offset current, can remain unchanged between measurement oil tack range to make the amplitude of fluctuation of gauge head;
By the effect of filter screen, granulometric impurity in oil is filtered, ensure that the oil purity that enters in oil groove is higher, prevent particulate from contacting with gauge head due to the swing of gauge head when measuring or rubbing, avoid the contact of particulate and gauge head or rub impacting the measurement of oil viscosity; Also avoid particulate to rub for a long time gauge head, cause gauge head to reduce serviceable life, even directly damage; By the effect of filter screen, can also reduce or eliminate the granulometric impurity in the oil of sampling;
Form oil groove by the effect of backplate and web joint, make the oil measured by gauge head in metastable environment, improve measuring accuracy;
In drilling process, by the effect of backplate, prevent the impurity in soil layer from causing damage to the micro-formula viscosity meter that shakes of moment of torsion;
Time rotational viscosimeter does not use, the vane group coelosis wall of rotational viscosimeter, shields to rotational viscosimeter when drill bit carries out drilling well; When rotational viscosimeter uses time, due to the principle of moment, blade can amplify the resistance of oil viscosity to rotational viscosimeter, improves the precision of measurement;
In drilling process, by the effect of pressure transducer, the pressure suffered by Real-Time Monitoring drill bit, and judge drilling state according to force value.
Technical solution adopted in the utility model is:
There is the online bilateral instrument of high precision petroleum viscosity of feeding function, comprise drive link, the bottom of described drive link is connected with drill bit, the other end and the drilling well drive unit of drive link are in transmission connection, described drill bit is connected with drive link by transiting rod, described drive link is provided with cavity A and cavity B from bottom to top successively, described cavity A is located at the bottom of drive link, the top of described cavity A is in communication with the outside, the plate upper surface of cavity A is provided with temperature control layer, the inwall of described cavity A is positioned at and is provided with filter screen with external connectivity part, the micro-formula viscosity meter that shakes of moment of torsion is provided with in cavity A, rotational viscosimeter is provided with in described cavity B, bottom and the drill bit top of described transiting rod are fixed, the sidewall of described transiting rod is provided with gets oilhole, be provided with in described transiting rod with get that oilhole is communicated with get oily piston, transiting rod is flexibly connected by piston A with drive link, described piston A is fixed on transiting rod, the piston rod A end of piston A and the base plate of cavity A are fixed, the top sides of described transiting rod is along being upwards provided with backplate, described drive link, the micro-formula viscosity meter that shakes of moment of torsion, rotational viscosimeter and get oily piston and control respectively by controller.
The further improvement project of the utility model is, the micro-formula viscosity meter that shakes of described moment of torsion comprises fixed reference axle, described fixed reference axle is equipped with overarm, driving stem, driven cover and gauge head from top to bottom successively, and the top of described fixed reference axle is fixed in drive link, and bottom is stretched in gauge head; Described overarm, driving stem, driven cover and gauge head are all rotationally connected with fixed reference axle, the above-below direction of overarm and gauge head is spacing respectively by fixed reference axle, the top of described overarm and driving stem is fixed, bottom and the gauge head of described driven cover are fixed, described driving stem and driven cover are rotationally connected, described overarm is located in the cavity B of drive link, overarm drive unit is provided with in described cavity B, be connected with the inwall of gauge head by equi intensity cantilever bottom described fixed reference axle, described equi intensity cantilever is provided with Fiber Bragg Grating FBG.
The utility model further improvement project is, described overarm drive unit comprises the pole piece being located at overarm both side ends position, also comprises and is fixed on cavity B inwall, drive coil corresponding to pole piece position.
The utility model further improvement project is, described equi intensity cantilever is horizontally disposed with, and one end that described equi intensity cantilever is wider and fixed reference axle are fixed, and one end that equi intensity cantilever is narrower and gauge head madial wall are fixed.
The utility model further improvement project is, between described fixed reference axle and overarm, fixed reference axle and driving stem, between fixed reference axle and gauge head, to be rotationally connected respectively by bearing between driving stem and drive link, to be connected by torque spring A between driving stem with driven cover.
The utility model further improvement project is, described Fiber Bragg Grating FBG, temperature sensor and temperature control layer to be conducted electricity with controller by wire and are connected, the wire of described Fiber Bragg Grating FBG conducts electricity with controller through the through hole A set by fixed reference axle and the through hole B set by drive link and is connected, the wire of described temperature sensor conducts electricity with controller through gauge head, the through hole A set by fixed reference axle and the through hole B set by drive link and is connected, and the wire of described temperature control layer conducts electricity with controller through the through hole B set by drive link and is connected.
The utility model further improvement project is, when piston rod A to return in piston A to range, cavity A and the external world separate by described backplate.
The utility model further improvement project is, the base plate of described cavity A is fixedly connected with drive link by the web joint set by edge, is provided with gap between adjacent web joint, and described gap is mated with backplate.
The utility model further improvement project is, filter screen is provided with between the gap of described web joint, the base of described filter screen is fixedly connected with the base plate of cavity A, the bottom of drive link respectively with top margin, and the dual-side of described filter screen is fixedly connected with two adjacent side connecting plate inwalls respectively.
The utility model further improvement project is, when piston rod A stretches out piston A to range, the top of backplate is higher than the top of gauge head.
The utility model further improvement project is, described rotational viscosimeter comprises measurement rotating shaft, the two ends measuring rotating shaft are connected with drive rod rotation respectively by bearing, the top of described measurement rotating shaft is in transmission connection by the output shaft of torque spring B and drive motor, measure rotating shaft bottom and be provided with tachometer of measuring A, described drive motor and tachometer of measuring are located in drive link respectively, tachometer of measuring B is provided with in described drive motor, described drive motor, tachometer of measuring A and tachometer of measuring B to conduct electricity with controller respectively by wire and are connected, described drive motor and the wire of the tachometer of measuring B through hole B be each passed through set by drive link conducts electricity with controller and is connected, the wire of described tachometer of measuring A to conduct electricity with controller through the central through hole D measured set by rotating shaft and the through hole B set by drive link successively and is connected.
The utility model further improvement project is, the arc that the chamber wall of described cavity B has polylith identical is formed, described arc is connected with measurement rotating shaft respectively by cross bar, one end fixation measuring rotating shaft of described cross bar, and it is in a center of symmetry with the axle center measuring rotating shaft, the other end of cross bar is connected to arc, and one end and the piston B of described arc are in transmission connection, and one end of described piston B and cross bar, piston rod B and arc and arc and cross bar are rotationally connected respectively by bearing pin.
The utility model further improvement project is, the junction of described transiting rod and drill bit is provided with pressure transducer, described pressure transducer to be conducted electricity with controller by wire and is connected, and the wire of described pressure transducer conducts electricity with controller through the through hole C set by transiting rod and the through hole B set by drive link and is connected; Describedly get the top that oilhole is positioned at pressure transducer.
The beneficial effects of the utility model are:
The first, the online bilateral instrument of high precision petroleum viscosity with feeding function of the present utility model, by micro-for moment of torsion formula viscosity meter and rotational viscosimeter of shaking is located in the drive link of drill bit, be convenient to staff while drilling well prospect pit, directly can record the viscosity of oil in oilbearing stratum, directly can judge whether the oil of this oil reservoir is applicable to exploitation, if judge to be applicable to exploitation, then samples by getting oily piston thus, reduce the labour intensity of staff, improve production efficiency; Drill bit continues after entering oil reservoir to bore a period of time downwards, oil serves the effect of cooling drill bit, and the drill bit that moment of torsion micro-shake formula viscosity meter and rotational viscosimeter and temperature is higher has a segment distance, measured oil affects less by temperature of diamond bit, by the effect of the temperature sensor bottom gauge head and temperature control layer, make survey be the temperature that has in specialized range, ensure the accuracy of measurement effect.
Second, the online bilateral instrument of high precision petroleum viscosity with feeding function of the present utility model, vibration measuring is carried out by Fiber Bragg Grating FBG, not only can avoid occurring that electrical sensor that traditional torsional oscillation formula viscosity meter adopts is as vibration-sensitive device, electromagnetic interference (EMI) is subject in petroleum collection on-the-spot meeting, the factor impacts such as High Temperature High Pressure, the phenomenon of measuring accuracy cannot be ensured, and by the effect of Fiber Bragg Grating FBG, controller is fed back, controller is made to provide drive coil offset current, can remain unchanged between measurement oil tack range to make the amplitude of fluctuation of gauge head.
Three, the online bilateral instrument of high precision petroleum viscosity with feeding function of the present utility model, by the effect of filter screen, granulometric impurity in oil is filtered, ensure that the oil purity entered in oil groove is higher, prevent particulate to contact with gauge head due to the swing of gauge head when measuring or rubbing, avoid the contact of particulate and gauge head or rub impacting the measurement of oil viscosity; Also avoid particulate to rub for a long time gauge head, cause gauge head to reduce serviceable life, even directly damage; By the effect of filter screen, can also reduce or eliminate the granulometric impurity in the oil of sampling.
Four, the online bilateral instrument of high precision petroleum viscosity with feeding function of the present utility model, forms oil groove by the effect of backplate and web joint, makes the oil measured by gauge head in metastable environment, improve measuring accuracy.
Five, the online bilateral instrument of high precision petroleum viscosity with feeding function of the present utility model, in drilling process, by the effect of backplate, prevents the impurity in soil layer from causing damage to the micro-formula viscosity meter that shakes of moment of torsion.
Six, the online bilateral instrument of high precision petroleum viscosity with feeding function of the present utility model, time rotational viscosimeter does not use, the vane group coelosis wall of rotational viscosimeter, shields to rotational viscosimeter when drill bit carries out drilling well; When rotational viscosimeter uses time, due to the principle of moment, blade can amplify the resistance of oil viscosity to rotational viscosimeter, improves the precision of measurement.
Seven, the online bilateral instrument of high precision petroleum viscosity with feeding function of the present utility model, in drilling process, by the effect of pressure transducer, the pressure suffered by Real-Time Monitoring drill bit, and judge drilling state according to force value.
accompanying drawing illustrates:
Cross-sectional schematic when Fig. 1 is the utility model structure measurement viscosity.
Cross-sectional schematic when Fig. 2 is the drilling well of the utility model structure.
Fig. 3 is the control block diagram of the micro-formula viscosity meter that shakes of moment of torsion.
Fig. 4 is the driving circuit block diagram of the micro-formula viscosity meter that shakes of moment of torsion.
Fig. 5 is that the Fiber Bragg Grating FBG of the micro-formula viscosity meter that shakes of moment of torsion reconciles theory diagram.
embodiment:
Composition graphs 1 and Fig. 2 known, the utility model comprises drive link 1, the bottom of described drive link 1 is connected with drill bit 2, the other end and the drilling well drive unit of drive link 1 are in transmission connection, described drill bit 2 is connected with drive link 1 by transiting rod 3, described drive link 1 is provided with cavity A and cavity B from bottom to top successively, described cavity A is located at the bottom of drive link 1, the top of described cavity A is in communication with the outside, base plate 6 upper surface of cavity A is provided with temperature control layer 32, the inwall of described cavity A is positioned at and is provided with filter screen 31 with external connectivity part, the micro-formula viscosity meter that shakes of moment of torsion is provided with in cavity A, rotational viscosimeter is provided with in described cavity B, bottom and drill bit 2 top of described transiting rod 3 are fixed, the sidewall of described transiting rod 3 is provided with gets oilhole 30, be provided with in described transiting rod 3 with get that oilhole 30 is communicated with get oily piston 29, transiting rod 3 is flexibly connected by piston A5 with drive link 1, described piston A5 is fixed on transiting rod 3, the piston rod A7 end of piston A5 and the base plate 6 of cavity A are fixed, the top sides of described transiting rod 3 is along being upwards provided with backplate 9, described drive link 1, the micro-formula viscosity meter that shakes of moment of torsion, rotational viscosimeter and get oily piston 29 and control respectively by controller.
The micro-formula viscosity meter that shakes of described moment of torsion comprises fixed reference axle 14, described fixed reference axle 14 is equipped with overarm 10, driving stem 15, driven cover 17 and gauge head 18 from top to bottom successively, the top of described fixed reference axle 14 is fixed in drive link 1, and bottom is stretched in gauge head 18, described overarm 10, driving stem 15, driven cover 17 and gauge head 18 are all rotationally connected with fixed reference axle 14, the above-below direction of overarm 10 and gauge head 18 is spacing respectively by fixed reference axle 14, described overarm 10 is fixed with the top of driving stem 15, bottom and the gauge head 18 of described driven cover 17 are fixed, described driving stem 15 is rotationally connected with driven cover 17, described overarm 10 is located in the cavity B11 of drive link 1, overarm drive unit is provided with in described cavity B11, be connected with the inwall of gauge head 18 by equi intensity cantilever 19 bottom described fixed reference axle 14, described equi intensity cantilever 19 is provided with Fiber Bragg Grating FBG 20.
Described overarm drive unit comprises the pole piece 13 being located at overarm 10 both side ends position, also comprises and is fixed on cavity B11 inwall, drive coil 12 corresponding to pole piece 13 position.
Described equi intensity cantilever 19 is horizontally disposed with, and one end that described equi intensity cantilever 19 is wider and fixed reference axle 14 are fixed, and one end that equi intensity cantilever 19 is narrower and gauge head 18 madial wall are fixed.
Between described fixed reference axle 14 and overarm 10, fixed reference axle 14 and driving stem 15, to be rotationally connected respectively by bearing 16 between fixed reference axle 14 and gauge head 18, between driving stem 15 and drive link 1, to be connected by torque spring A between driving stem 15 with driven cover 17.
Described Fiber Bragg Grating FBG 20, temperature sensor and temperature control layer 32 to be conducted electricity with controller by wire and are connected, the wire of described Fiber Bragg Grating FBG 20 conducts electricity with controller through the through hole A set by fixed reference the axle 14 and through hole B set by drive link 1 and is connected, the wire of described temperature sensor conducts electricity with controller through gauge head 18, the through hole A set by fixed reference axle 14 and the through hole B set by drive link 1 and is connected, and the wire of described temperature control layer 32 conducts electricity with controller through the through hole B set by drive link 1 and is connected.
When piston rod A7 to return in piston A5 to range, cavity A and the external world separate by described backplate 9.
The base plate 6 of described cavity A is fixedly connected with drive link 1 by the web joint 8 set by edge, and be provided with gap between adjacent web joint 18, described gap is mated with backplate 9.
Be provided with filter screen 31 between the gap of described web joint 18, the base of described filter screen 31 is fixedly connected with the base plate 6 of cavity A, the bottom of drive link 1 respectively with top margin, and the dual-side of described filter screen 31 is fixedly connected with two adjacent side connecting plate 8 inwalls respectively.
When piston rod A7 stretches out piston A5 to range, the top of backplate 9 is higher than the top of gauge head 18.
Described rotational viscosimeter comprises measures rotating shaft 23, the two ends measuring rotating shaft 23 are rotationally connected respectively by bearing 16 and drive link 1, the top of described measurement rotating shaft 23 is in transmission connection by the output shaft of torque spring B22 and drive motor 21, measure rotating shaft 23 bottom and be provided with tachometer of measuring A27, described drive motor 21 and tachometer of measuring 27 are located in drive link 1 respectively, tachometer of measuring B is provided with in described drive motor 21, described drive motor 21, tachometer of measuring A27 and tachometer of measuring B to conduct electricity with controller respectively by wire and are connected, described drive motor 21 and the wire of the tachometer of measuring B through hole B be each passed through set by drive link 1 conducts electricity with controller and is connected, the wire of described tachometer of measuring A27 to conduct electricity with controller through the central through hole D measured set by rotating shaft 23 and the through hole B set by drive link 1 successively and is connected.
The arc 25 that the chamber wall of described cavity B has polylith identical is formed, described arc 25 is connected with measurement rotating shaft 23 respectively by cross bar 24, one end fixation measuring rotating shaft 23 of described cross bar 24, and it is in a center of symmetry with the axle center measuring rotating shaft 23, the other end of cross bar 24 is connected to arc 25, one end and the piston B26 of described arc 25 are in transmission connection, and one end of described piston B26 and cross bar 24, piston rod B and arc 25 and arc 25 are rotationally connected respectively by bearing pin 28 with cross bar 24.
Described transiting rod 3 is provided with pressure transducer 4 with the junction of drill bit 2, described pressure transducer 4 to be conducted electricity with controller by wire and is connected, and the wire of described pressure transducer 4 conducts electricity with controller through the through hole C set by the transiting rod 3 and through hole B set by drive link 1 and is connected; Describedly get the top that oilhole 30 is positioned at pressure transducer 4.
When the utility model carries out drilling well, piston rod A7 returns to range in piston A5, and piston rod B stretches out piston B26 to range place, and now drilling well drive unit drives drive link 1 to rotate, drive link 1 drives drill bit 2 to rotate by transiting rod 3, and drilling well downwards, now, soil layer has larger acting force to drill bit 2, by the effect of pressure transducer 4, the force value of soil layer suffered by drill bit 2 is monitored, and is sent to controller simultaneously, after the pressure value monitored when pressure transducer 4 significantly reduces, show that drill bit 2 visits oil reservoir, continue after now reducing the rotating speed of drill bit 2 to bore downwards, after the pressure value monitored when pressure transducer 4 is stable, closes drilling well drive unit, drill bit is stopped operating, now piston rod A7 stretches out piston A5 to range place, and backplate 9 and web joint 8 form oil groove, and gauge head 18 is in oil groove, and the oil in oil reservoir enters oil groove after passing into the filtration of filter screen 31, by temperature sensor, thermometric is carried out to the oil in oil groove, by the temperature feedback of oil to controller, when the oil temperature in oil groove is not in the scope of 15 ~ 30 degrees Celsius, by the effect of controller, control temperature control layer 32 to carry out freezing or heating, until the oil temperature in oil groove is in the scope of 15 ~ 30 degrees Celsius, by the effect of controller, what control drive coil 12 must electricly make overarm 10 swing back and forth around fixed reference axle 14 with dead electricity, by being in transmission connection of driving stem 15 and driven cover 17, the swing of overarm 10 is passed to gauge head 18, because the oil in oil groove has viscosity, the swing of gauge head 18 can be hindered, so the amplitude of fluctuation of gauge head 18 is less than the amplitude of fluctuation of overarm 10, controller calculates the amplitude of fluctuation of gauge head 18 by Fiber Bragg Grating FBG 20, and electric current is afforded redress to drive coil 12 after calculating, can maintain to make the amplitude of fluctuation of gauge head 18, and according to the corresponding relation between provided offset current and liquid viscosity, pass through founding mathematical models, then can accurately calculate oil viscosity value, simultaneously, piston rod B returns in piston B26 to range place, arc 25 is parallel with cross bar 24, rotated by drive motor 21 control survey rotating shaft 23, due to the drag effects that arc 25 is produced by oil viscosity in rotation process, the rotation of measuring rotating shaft 23 can lag behind the rotation of drive motor 21, when after the stabilization of speed measuring rotating shaft 23, record drive motor 21, measure the respective rotating speed of rotating shaft 23, and the acting force that torque spring B22 bears, by calculating oil viscosity value, according to the oil viscosity value that moment of torsion micro-shake formula viscosity meter and rotational viscosimeter calculate separately, after considering, judge whether the oil of this oil reservoir is applicable to exploitation, if judge that the oil of this oil reservoir is applicable to exploitation, then by the effect of controller, control to get oily piston 29 to be sampled by the oil of this oil reservoir by getting oilhole 30, oil is entered by filter screen 31 and gets in oilhole 30.
From power perspective, when moment of torsion is micro-shake formula viscosity meter unloaded time, namely when gauge head 18 does not immerse in viscous liquid, control drive coil 12 by driving circuit and drive overarm 10 to twist, have:
（1）
Wherein, U, I are respectively the electric current in the voltage and driving circuit being added in driving circuit two ends; W
1the power that when being then zero load, driving circuit expends.
When gauge head 18 is immersed in after in viscous liquid, gauge head 18 reduces amplitude because being subject to viscous liquid resistance.Now, controller is adjusted driving voltage by signal processing circuit, makes gauge head 18 amplitude restoration to initial size.Now, voltage there occurs change, can suppose that the voltage increased is Δ U.Obtain thus:
（2）
Therefore, have:
（3）
Because electric current may also can change, formula can be out of shape:
（4）
Meanwhile, by viscous liquid shear stress formula, can obtain:
（5）
Wherein, η is kinematic viscosity; w
1the angular velocity of gauge head; H is the length that gauge head immerses viscous liquid; R is the radius of gauge head 18; M is then the moment of resistance that gauge head 18 is subject to.
（6）
（7）
（8）
(A is the amplitude of gauge head) (9)
(T is the vibration period) (10)
（11）
Relation between above-mentioned viscosity and voltage variety draws when viscous liquid is static.When viscous liquid starts to flow, that just need consider viscous liquid streams resistance.
According to Bernoulli equation, suffered by object stream resistance as shown in the formula:
（12）
ρ refers to the density of viscous liquid, V
∞ 2refer to the flow velocity of viscous liquid; A refers to that object is perpendicular to the sectional area carrying out flow path direction; C
dbe then a dimensionless factor, it is concrete relevant with the Reynolds number of viscous liquid with the shape of object.
When the Reynolds number of viscous liquid is in low reynolds number district, have:
（13）
Therefore, have:
（14）
Thus, the relational expression between viscosity and voltage variety can be revised:
（15）
（16）
（17）
Relational expression between temperature and viscosity obtains by Andrade formula:
（18）
Wherein: A is experimental constant, need to obtain in the experiment of different temperatures; K is Bo Erci constant; T is absolute temperature; E is viscous flow activation energy, obtains by tabling look-up.
If the Bo Erci constant in above formula and viscous flow activation energy the unknown, by the viscosity under two kinds of known temperatures, the viscosity at the third temperature can be asked for, now establishes E/K=B, and calculate the value of B and A by formula below:
（19）
（20）
The viscosity of viscous liquid increases with pressure increase, but not as the viscosity of gas and the in close relations of pressure.Under 500MPa, the relational expression of viscous liquid viscosity and pressure represents with following formula:
（21）
η
1for the viscosity (under 1 atmospheric pressure) under 0.1MPa; P is pressure; A is pressure coefficient, and its value depends on the composition with viscous liquid, and varies with temperature.Common liq is near 0.1MPa, and when often increasing 0.1MPa, the viscosity of liquid about increases by 0.1% to 0.3%.
By above-mentioned derivation, obtain the basic relational expression between the amplitude of gauge head 18 and corresponding viscous liquid viscosity, and consider more corresponding relevant influence factors, as viscous liquid flow velocity, temperature and pressure.This relational expression can be applicable to that moment of torsion is micro-to shake in the theoretical model of formula viscosity meter, can go out oil viscosity by information inferences such as gauge head 18 amplitude measured by Fiber Bragg Grating FBG 20 or angular velocity.
As shown in Figure 3, overarm 10 is driven to drive driving stem 15 to carry out torsional mode vibration by driving circuit, gauge head 18 is immersed after in oil, the friction force produced by oil viscosity has an impact to the amplitude of gauge head 18, now by based on Fiber Bragg Grating FBG 20(FBG) vibration sensing type structure, record the corresponding amplitude of gauge head 18, carry out real-time data acquisition, according to this amplitude variations, via the data processing algorithm of controller, the drive current of drive coil 12 is compensated accordingly, until gauge head 18 returns to original amplitude.Meanwhile, compensation current is sent to controller, thus derives the viscosity number of oil.
Composition graphs 4 and Fig. 5 known, driving circuit requires the drive singal realizing stable output, be designed to square-wave signal, two-way is divided to export, control the feed circuit of four groups of drive coils 12 respectively, wherein a road is via phase inverter, realizes the periodicity timesharing break-make of coil, by the electromagnetic force between the pole piece 13 in overarm 10, drive overarm 10 with the micro-driving stem 15 of the formula viscosity meter that shakes of dynamic torque and the twisting of gauge head 18.
Fiber Bragg Grating FBG 20(FBG) be wavelength-modulated type device, for Fiber Bragg Grating FBG 20(FBG) wavelength interrogation technique be also one of gordian technique of vibration survey.Usually Fiber Bragg Grating FBG 20(FBG is utilized) demodulation scheme taked of vibration measuring is matching matrix, reference grating due to matching matrix needs the driving of electrical category device, so should not be placed among transducer probe assembly together with measurement grating with reference to grating.Simultaneously, consider in matched filtering by the Wavelength demodulation range problem limited with reference to grating, therefore common matching matrix has been abandoned, and adopt passive type Wavelength demodulation method, the method signal processing system is simple, and the impact of light intensity change can be eliminated, and be relatively applicable to the Fiber Bragg Grating FBG 20(FBG in the utility model) needs of demodulation.
The light exported by wideband light source enters Fiber Bragg Grating FBG 20(FBG through coupling mechanism A) in, by Fiber Bragg Grating FBG 20(FBG) light that reflects is divided into two-way to propagate after coupling mechanism A and coupling mechanism B.Wherein a road is before entering photodetector, first through an optical filter filtering, this wave filter has certain light transmission features, namely in the wavelength coverage of measuring system full scale, spectral transmittance is the linear function of wavelength, in addition according to Fiber Bragg Grating FBG 20(FBG in the utility model) the needs that are more big changes of centre wavelength, so the wave filter that select tape is roomy; A branch of reference light then directly enters photodetector in addition.The signal of two photodetector outputs is through being amplified into divider, and the ratio of filtered light signal and unfiltered light signal provides the information of reflected light peak wavelength.
The linear function of optical filter equation can be expressed as:
（22）
Wherein, A is the slope of linear filter; λ 0 is zero output wavelength.
If assuming that the narrow-band spectrum of optical grating reflection meets the Gaussian function that central wavelength lambda B and live width are Δ λ, then the ratio of two ways of optical signals light intensity is expressed as follows:
（23）
The size of λ B can be detected by IS/IR easily, namely obtain signal to be measured.
For ensureing the measuring accuracy of viscosity, for Fiber Bragg Grating FBG 20(FBG) restituted signal, need to carry out filtering.Due to the switching frequency that gauge head 18 vibration frequency is four groups of drive coils 12, this frequency is known, therefore by wave filter abatement undesired signal.Then, then signal is amplified, by data sampling, obtain corresponding amplitude parameter, and transmit it to controller.The amplitude data collected and original amplitude compare by controller, when determining that it is less than original amplitude, can calculate required offset, make its output current compensating signal to increase the drive current of drive coil 12, make gauge head 18 recover original amplitude.Meanwhile, this current offset values will store in the controller, uses the electric current-Viscosity Model of above-mentioned derivation, calculates the viscosity number of oil.
Claims (10)
1. there is the online bilateral instrument of high precision petroleum viscosity of feeding function, comprise drive link (1), the bottom of described drive link (1) is connected with drill bit (2), the other end and the drilling well drive unit of drive link (1) are in transmission connection, it is characterized in that: described drill bit (2) is connected with drive link (1) by transiting rod (3), described drive link (1) is provided with cavity A and cavity B from bottom to top successively, described cavity A is located at the bottom of drive link (1), the top of described cavity A is in communication with the outside, base plate (6) upper surface of cavity A is provided with temperature control layer (32), the inwall of described cavity A is positioned at and is provided with filter screen (31) with external connectivity part, the micro-formula viscosity meter that shakes of moment of torsion is provided with in cavity A, rotational viscosimeter is provided with in described cavity B, bottom and drill bit (2) top of described transiting rod (3) are fixed, the sidewall of described transiting rod (3) is provided with gets oilhole (30), be provided with in described transiting rod (3) with get that oilhole (30) is communicated with get oily piston (29), transiting rod (3) and drive link (1) are by piston A(5) be flexibly connected, described piston A(5) be fixed on transiting rod (3), piston A(5) piston rod A(7) base plate (6) of end and cavity A fixes, the top sides of described transiting rod (3) is along being upwards provided with backplate (9), described drive link (1), the micro-formula viscosity meter that shakes of moment of torsion, rotational viscosimeter and get oily piston (29) and control respectively by controller.
2. there is the online bilateral instrument of high precision petroleum viscosity of feeding function as claimed in claim 1, it is characterized in that: the micro-formula viscosity meter that shakes of described moment of torsion comprises fixed reference axle (14), described fixed reference axle (14) is equipped with overarm (10), driving stem (15), driven cover (17) and gauge head (18) from top to bottom successively, the top of described fixed reference axle (14) is fixed in drive link (1), and bottom is stretched in gauge head (18), described overarm (10), driving stem (15), driven cover (17) and gauge head (18) are all rotationally connected with fixed reference axle (14), the above-below direction of overarm (10) and gauge head (18) is spacing respectively by fixed reference axle (14), described overarm (10) is fixed with the top of driving stem (15), the bottom of described driven cover (17) and gauge head (18) are fixed, described driving stem (15) and driven cover (17) are rotationally connected, the cavity B(11 of drive link (1) is located in described overarm (10)) in, described cavity B(11) in be provided with overarm drive unit, described fixed reference axle (14) bottom is connected with the inwall of gauge head (18) by equi intensity cantilever (19), described equi intensity cantilever (19) is provided with Fiber Bragg Grating FBG (20).
3. there is the online bilateral instrument of high precision petroleum viscosity of feeding function as claimed in claim 2, it is characterized in that: described overarm drive unit comprises the pole piece (13) being located at overarm (10) both side ends position, also comprises and is fixed on cavity B(11) inwall, drive coil (12) corresponding to pole piece (13) position.
4. there is the online bilateral instrument of high precision petroleum viscosity of feeding function as claimed in claim 2, it is characterized in that: described equi intensity cantilever (19) is horizontally disposed with, one end that described equi intensity cantilever (19) is wider and fixed reference axle (14) are fixed, and one end that equi intensity cantilever (19) is narrower and gauge head (18) madial wall are fixed.
5. there is the online bilateral instrument of high precision petroleum viscosity of feeding function as claimed in claim 2, it is characterized in that: between described fixed reference axle (14) and overarm (10), fixed reference axle (14) and driving stem (15), to be rotationally connected respectively by bearing (16) between fixed reference axle (14) and gauge head (18), between driving stem (15) and drive link (1), to be connected by torque spring A between driving stem (15) with driven cover (17).
6. there is the online bilateral instrument of high precision petroleum viscosity of feeding function as claimed in claim 2, it is characterized in that: described Fiber Bragg Grating FBG (20), temperature sensor and temperature control layer (32) to be conducted electricity with controller by wire and are connected, the wire of described Fiber Bragg Grating FBG (20) conducts electricity with controller through the through hole A set by fixed reference axle (14) and the through hole B set by drive link (1) and is connected, the wire of described temperature sensor is through gauge head (18), through hole A set by fixed reference axle (14) and the through hole B set by drive link (1) conducts electricity with controller and is connected, the wire of described temperature control layer (32) conducts electricity with controller through the through hole B set by drive link (1) and is connected.
7. as the high precision petroleum viscosity with the feeding function online bilateral instrument of claim 2 ~ 6 wherein as described in any one, it is characterized in that: the base plate (6) of described cavity A is fixedly connected with drive link (1) by the web joint (8) set by edge, be provided with gap between adjacent web joint (18), described gap is mated with backplate (9); Filter screen (31) is provided with between the gap of described web joint (18), the base of described filter screen (31) is fixedly connected with the base plate (6) of cavity A, the bottom of drive link (1) respectively with top margin, and the dual-side of described filter screen (31) is fixedly connected with adjacent two side connecting plates (8) inwall respectively; As piston rod A(7) return piston A(5) in range time, cavity A and the external world separate by described backplate (9); As piston rod A(7) stretch out piston A(5) to range time, the top of backplate (9) is higher than the top of gauge head (18).
8. there is the online bilateral instrument of high precision petroleum viscosity of feeding function as claimed in claim 1, it is characterized in that: described rotational viscosimeter comprises measures rotating shaft (23), the two ends measuring rotating shaft (23) are rotationally connected respectively by bearing (16) and drive link (1), the top of described measurement rotating shaft (23) is by torque spring B(22) be in transmission connection with the output shaft of drive motor (21), measure rotating shaft (23) bottom and be provided with tachometer of measuring A(27), described drive motor (21) and tachometer of measuring (27) are located in drive link (1) respectively, described drive motor is provided with tachometer of measuring B in (21), described drive motor (21), tachometer of measuring A(27) to conduct electricity with controller respectively by wire with tachometer of measuring B and be connected, described drive motor (21) and the wire of the tachometer of measuring B through hole B be each passed through set by drive link (1) conducts electricity with controller and is connected, described tachometer of measuring A(27) wire to conduct electricity with controller through the central through hole D measured set by rotating shaft (23) and the through hole B set by drive link (1) successively and be connected.
9. there is the online bilateral instrument of high precision petroleum viscosity of feeding function as claimed in claim 8, it is characterized in that: the arc (25) that the chamber wall of described cavity B has polylith identical is formed, described arc (25) is connected with measurement rotating shaft (23) respectively by cross bar (24), one end fixation measuring rotating shaft (23) of described cross bar (24), and it is in a center of symmetry with the axle center measuring rotating shaft (23), the other end of cross bar (24) is connected to arc (25), one end of described arc (25) and piston B(26) be in transmission connection, described piston B(26) one end and cross bar (24), piston rod B and arc (25) and arc (25) are rotationally connected respectively by bearing pin (28) with cross bar (24).
10. there is the online bilateral instrument of high precision petroleum viscosity of feeding function as claimed in claim 1, it is characterized in that: described transiting rod (3) is provided with pressure transducer (4) with the junction of drill bit (2), described pressure transducer (4) to be conducted electricity with controller by wire and is connected, and the wire of described pressure transducer (4) conducts electricity with controller through the through hole C set by transiting rod (3) and the through hole B set by drive link (1) and is connected; Describedly get the top that oilhole (30) is positioned at pressure transducer (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520274974.9U CN204694588U (en) | 2015-04-30 | 2015-04-30 | There is the online bilateral instrument of high precision petroleum viscosity of feeding function |
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| CN201520274974.9U CN204694588U (en) | 2015-04-30 | 2015-04-30 | There is the online bilateral instrument of high precision petroleum viscosity of feeding function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807724A (en) * | 2015-04-30 | 2015-07-29 | 淮安市计量测试所 | High-accuracy on-line oil viscosity detector with material taking function |
| CN112748048A (en) * | 2020-12-22 | 2021-05-04 | 青岛科技大学 | Intelligent digital display viscosity measuring device and measuring method thereof |
-
2015
- 2015-04-30 CN CN201520274974.9U patent/CN204694588U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807724A (en) * | 2015-04-30 | 2015-07-29 | 淮安市计量测试所 | High-accuracy on-line oil viscosity detector with material taking function |
| CN104807724B (en) * | 2015-04-30 | 2017-05-10 | 淮安市计量测试所 | High-accuracy on-line oil viscosity detector with material taking function |
| CN112748048A (en) * | 2020-12-22 | 2021-05-04 | 青岛科技大学 | Intelligent digital display viscosity measuring device and measuring method thereof |
| CN112748048B (en) * | 2020-12-22 | 2023-03-17 | 青岛科技大学 | Intelligent digital display viscosity measuring device and measuring method thereof |
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