CN106124118B - Rise bubble instrument and its application method - Google Patents

Rise bubble instrument and its application method Download PDF

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Publication number
CN106124118B
CN106124118B CN201610520944.0A CN201610520944A CN106124118B CN 106124118 B CN106124118 B CN 106124118B CN 201610520944 A CN201610520944 A CN 201610520944A CN 106124118 B CN106124118 B CN 106124118B
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glass infuser
metal kettle
bubble
pump
instrument
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CN106124118A (en
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张可
李实�
陈兴隆
杨胜建
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China Petroleum and Natural Gas Co Ltd
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China Petroleum and Natural Gas Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L11/00Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00

Abstract

The present invention provides a kind of liter bubble instrument, comprising: metal kettle, one side are equipped with camera, and the other side is equipped with light source body;Glass infuser is located in metal kettle, and glass infuser is fixedly arranged on metal kettle and is connected with the first pump, and glass infuser lower end is opening, and glass infuser is connected to metal kettle;Gas injects needle tubing, and backshank end is connected with the second pump, and needle end protrudes into glass infuser;Two electromagnetic coils, are connected with controller, and two electromagnetic coils are located in metal kettle and are set to glass infuser two sides;It also provides the application method for rising bubble instrument, comprising: step a: being pumped from first and be full of water into metal kettle until being the first setting pressure in it, then inject crude oil to glass infuser with the second setting pressure greater than the first setting pressure from the first pump;Step b: gas is entered to gas injection needle tube pump with third setting pressure from the second pump;Step c: it opens controller and generates alternate electromagnetic field, until bubble is detached from needle end, be then turned on camera.The present invention makes bubble fall off in time, and Air Bubble Size is consistent.

Description

Rise bubble instrument and its application method
Technical field
The present invention relates to oil-gas field development field, refers to a kind of device for testing oil gas minimum miscibility pressure and its make With method, specifically a kind of liter bubble instrument that can assist being detached from bubble and its application method.
Background technique
In recent years, with CO2The continuous development of miscible displacement of reservoir technology, the measuring technique of oil gas minimum miscibility pressure (MMP) Improvement is also concerned, which is that Oil Field implements CO2One of technology of reservoir sweep and the key parameter of oil reservoir solution formulation, accurately And rapidly obtaining the value is the key that petroleum science and technology worker solves many technology of reservoir sweep problems.Currently, it is minimum to obtain oil gas The test method of miscible pressure (MMP) value includes: tubule method of testing, interfacial tension method of testing and liter bubble instrument method, tubule therein Method of testing is widely used in each major oil companies and scientific research institutions, but tubule method of testing has that time-consuming in use (about 5 weeks), the disadvantages such as at high cost, experimental model standardization level is low, and interfacial tension method is affected by human factors because it exists Seriously, used using limited deficiency it is less, rise bubble instrument method have it is time-consuming it is short, meet CO inside oil reservoir2Drive process belongs to oil The advantages that gas multiple-contact, usually testing a sample can complete within several hours, therefore, rise bubble instrument method with quite wide Application prospect.
Rise the test philosophy of bubble instrument method are as follows: by the bottom of a glass infuser of stainless steel needle tubing insertion vertically upward, glass infuser It is inside pre-charged with crude oil, injects a minute bubbles (usually nitrogen (N into glass infuser by needle point2), carbon dioxide (CO2) or Natural gas (NG)), utilize motion feature of the camera system observation bubble in crude oil;Finally according to movement characteristic and stroke come really Stand oil gas minimum miscibility pressure (MMP).
However, finding in experimental test procedures, gas is by often hanging over needle point after needle tubing and when coming out from needle point Place, it is not easily to fall off, and continue after injecting gas, cause to be detached from after bubble constantly increases at needle point, each Air Bubble Size Different to cause experimental error larger, therefore test inaccuracy is easy bubble and falls off in time, and with uniform big The small problem for becoming in the urgent need to address at present that falls off.
In view of the above-mentioned problems of the prior art, the present inventor combines the design and use of related manufacturing field many years Experience is aided with too strong professional knowledge, optimizes to existing structure, provides a kind of liter bubble instrument and its application method, To overcome drawbacks described above.
Summary of the invention
The object of the present invention is to provide a kind of liters to steep instrument, bubble can be made to fall off in time, and Air Bubble Size is consistent, is able to achieve The test of oil gas minimum miscibility pressure, experiment accuracy height, favorable repeatability.
It is a further object of the present invention to provide a kind of application methods for rising bubble instrument, bubble can be made to fall off in time, and bubble It is in the same size, it is able to achieve the test of oil gas minimum miscibility pressure, experiment accuracy height, favorable repeatability.
Following technical proposal can be used to realize in above-mentioned purpose of the invention:
The present invention provides a kind of liter bubble instrument, wherein the liter bubble instrument includes: metal kettle, and one side is equipped with along the vertical direction Multiple cameras, the other side are equipped with the light source body opposite with multiple cameras;Glass infuser is located at the metal kettle Interior, the upper end of the glass infuser is fixedly arranged on the roof of the metal kettle and is connected with the first pump, and the lower end of the glass infuser is to open Mouthful, the glass infuser is connected by the opening with the metal kettle;Gas injects needle tubing, backshank end and the second pump phase Even, the bottom wall that needle end passes through the metal kettle protrudes into the glass infuser;Two electromagnetic coils, the electromagnetic coil and control Device processed is connected, and two electromagnetic coils are located in the metal kettle and are symmetrically set to the two sides of the glass infuser, the electricity Magnetic coil is opposite with the gas injection needle end level of needle tubing, and the controller alternately can individually control two electromagnetic wires It encloses and generates alternate electromagnetic field.
In a preferred embodiment, the roof of the metal kettle is equipped with end cover, and the glass infuser is fixedly arranged on described End cover, the glass infuser are connected by the end cover with first pump.
In a preferred embodiment, sealing filament is equipped between the gas injection needle tubing and the bottom wall of the metal kettle It is stifled.
In a preferred embodiment, the electromagnetic coil is semicircle.
In a preferred embodiment, the electromagnetic coil outer cladding waterproof layer.
The present invention also provides a kind of application methods as described above for rising bubble instrument, wherein the application method for rising bubble instrument Include the following steps:
Step a: by first pump into metal kettle full of water until the metal kettle in pressure be first setting pressure, Crude oil is injected into glass infuser with the second setting pressure by first pump again, and forms grease circle in the glass infuser Face, the second setting pressure are greater than the first setting pressure;
Step b: pressure is set with third by the second pump and enters gas to gas injection needle tube pump, the third sets pressure Greater than the first setting pressure and it is less than the second setting pressure;
Step c: opening controller, and two electromagnetic coils is made to generate alternate electromagnetic field, until gas injection needle tubing The bubble that needle end generates is detached from the needle end under the action of alternate electromagnetic field, is then turned on camera and is recorded.
Preferably, in the step a, the oil-water interfaces are located at the top of the needle end of gas injection needle tubing.
Preferably, in the step a, the first setting high 0.05Mpa of pressure described in the second setting pressure ratio.
Preferably, in the step b, the first setting high 0.02Mpa of pressure described in the third setting pressure ratio.
It preferably, further include step b1 between the step b and the step c, when the needle of gas injection needle tubing When visible bubble occurs in head end, stop second pump.
The characteristics of liter bubble instrument of the invention and its application method and advantage are:
1, power is provided for fluid injection by the first pump, water is injected into metal kettle with the first setting pressure, makes gold Belong to kettle and hyperbaric environment is provided, and original is injected into glass infuser with the second setting pressure for being higher than the first setting pressure by the first pump Oil makes crude oil and water generate oil-water interfaces in glass infuser, and the analysis for oil gas mixed phase provides simulated environment;
2, by the second pump to be higher than the first setting pressure and set pressure to gas lower than the third of the second setting pressure Gas is injected in injection needle tubing, until visible bubble occurs in the needle end of gas injection needle tubing, guarantees Air Bubble Size Consistency, the stroke for making bubble pass by crude oil is essentially identical, facilitates carry out quantitative analysis;
3, by the monosymmetric setting electromagnetic coil in glass infuser, make to generate alternately electromagnetism between two electromagnetic coils Field action shakes needle end in needle end, and then controls bubble and fall off, and so that bubble is fallen off controlled, guarantees in the same size Bubble in time, smoothly enter in crude oil in glass infuser, and photographed to record by camera, to realize bubble in original The analysis of metamorphosis in oil, determines the value of oil gas minimum miscibility pressure (MMP);
The present invention realizes makes the bubble of the needle end of gas injection needle tubing fall off in time at different temperatures and pressures Into being risen in the crude oil in glass infuser, guarantee that Air Bubble Size is consistent, bubble falls off controlled, ensure that the consistency of test And repeatability, measuring accuracy is improved, human error is eliminated, solves liter during bubble that Air Bubble Size is different to be caused to calculate The biggish problem of results change, shortens time of measuring, can the large-scale application for oil gas miscible displacement of reservoir mode in oil field provide Strong technical support and reference data, and then improve oil recovery.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other Attached drawing.
Fig. 1 is the structural schematic diagram of liter bubble instrument of the invention;
Fig. 2 is the flow chart of the application method of liter bubble instrument of the invention.
Drawing reference numeral explanation:
1 light source body, 2 metal kettles, 3 glass infusers, 4 crude oil, 5 water, 6 oil-water interfaces, 7 first sealing silk plugs, 8 first electromagnetic wires Circle, 9 thirds seal silk plug, and 10 second pumps, 11 end covers, 12 first pump, 13 cameras, 14 second sealing silk plugs, and 15 second Electromagnetic coil, 16 bubbles, 17 gases inject needle tubing, 18 controllers, 19 electric wires, 20 tubing strings.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
Embodiment one:
As shown in Figure 1, the present invention provides a kind of liter bubble instrument, wherein the liter bubble instrument includes: metal kettle 2, and one side is along perpendicular Histogram is equipped with the light source body 1 opposite with multiple cameras 13 to multiple cameras 13, the other side is equipped with;Glass infuser 3, In the metal kettle 2, the upper end of the glass infuser 3 is fixedly arranged on the roof of the metal kettle 2 and is connected with the first pump 12, institute The lower end of glass infuser 3 is stated as opening, the glass infuser 3 is connected by the opening with the metal kettle 2;Gas injects needle tubing 17, backshank end is connected with the second pump 10, and the bottom wall that needle end passes through the metal kettle 2 protrudes into the glass infuser 3;Two Electromagnetic coil, the electromagnetic coil are connected with controller 18, and two electromagnetic coils are located in the metal kettle 2 and symmetrically Set on the two sides of the glass infuser 3, the electromagnetic coil is opposite with the gas injection needle end level of needle tubing 17.
Specifically, metal kettle 2 can be cylinder-shaped or cuboid etc., glass infuser 3 is cylinder-shaped, and metal kettle 2 and glass Cylinder 3 be it is transparent, with provide observation bubble shape variation visible area, pass through be located at metal kettle 2 outside 1 energy of light source body Illumination is located at the glass infuser 3 in metal kettle 2, and then provides transmitted light for the movement that camera 13 records bubble 16 in glass infuser 3 Source, light source body 1 therein can be one, or what is be arranged along the vertical direction is multiple, and multiple light sources body 1 can with it is multiple Camera 13 is arranged in a one-to-one correspondence, and to provide more fully illuminating effect, camera 13 can also be according to the need of camera shooting record Its quantity is set, herein with no restrictions;In one embodiment, bubble instrument of the invention can be placed in constant-temperature air bath device It is interior, to provide required temperature condition for test.
Further, the roof of the metal kettle 2 is equipped with end cover 11, and the glass infuser 3 is fixedly arranged on the sealed end Lid 11, the glass infuser 3 12 are connected by the end cover 11 with first pump, specifically, metal kettle 2 be it is closed, Center of the end cover 11 tightly set on the roof of metal kettle 2 plugs tubing string on end cover 11 to guarantee the sealing of metal kettle 2 20, one end of tubing string 20 12 is connected with the first pump being located at outside metal kettle 2, the other end of tubing string 20 be connected to end cover 11 3 inner cavity of glass infuser of lower section is connected, and injects water 5 into metal kettle 2 indirectly by glass infuser 3 to realize, realizes in metal kettle 2 Hyperbaric environment, while by first pump 12 directly into the glass infuser 3 being immersed in hyperbaric environment inject crude oil 4, certainly manage Column 20 can also be equipped with branch's tubing string, to be directly connected with 2 inner cavity of metal kettle by branch's tubing string, herein with no restrictions.
Further, the electromagnetic coil is semicircle, i.e., each electromagnetic coil includes that a semicircle side and one are spacious Mouthful, two electromagnetic coils are respectively the first electromagnetic coil 8 and the second electromagnetic coil 15, the opening and second of the first electromagnetic coil 8 The opening of electromagnetic coil 15 is oppositely disposed at the two sides of glass infuser 3, and opposite with the gas injection needle end of needle tubing 17 simultaneously, The centre on the semicircle side of the first electromagnetic coil 8 connects live wire 19, and electric wire 19 is pierced by the side wall of metal kettle 2 and is connected to control Device 18 processed, while the second electromagnetic coil 15 is pierced by the side wall of metal kettle 2 also by electric wire 19 and is connected to controller 18, makes to control Device 18 alternately individually controls two electromagnetic coils and generates alternate electromagnetic field, so that the first electromagnetic coil 8 and the second electromagnetism The alternate electromagnetic field formed between coil 15 acts on needle end, shakes needle end, and then makes the bubble 16 of needle end It is detached from;Wherein, the electromagnetic coil outer cladding waterproof layer, the waterproof layer can be teflon coatings, certainly can also be to electromagnetic coil Other water-proofing treatments are carried out, to prevent electromagnetic coil from leaky occurring in the water in metal kettle 2, while immersing metal kettle 2 Interior electric wire 19 can also make water-proofing treatment, such as be coated with waterproof layer.
Further, third is equipped between the gas injection needle tubing 17 and the bottom wall of the metal kettle 2 seal silk plug 9, To guarantee that gas injection needle tubing 17 and the contact position of metal kettle 2 will not leak, meanwhile, the first electromagnetic coil of connection 8 and control The electric wire 19 of device 18 processed is arranged with the first sealing silk plug 7, the second electromagnetic coil of connection 15 and controller 18 when passing through metal kettle 2 Electric wire 19 pass through metal kettle 2 when be arranged with the second sealing silk plug 14, with realize sealing, guarantee metal kettle 2 in high compression ring Border avoids the water in metal kettle 2 from leaking, and causes the stroke in 16 uphill process of bubble different, makes oil gas minimum mixed phase pressure Power test inaccuracy.
The present invention realizes the bubble 16 for the needle end for making gas injection needle tubing 17 at different temperatures and pressures according to wanting The size asked is detached from, and disengaging is controlled, and bubble is in the same size, keeps the consistency and repeatability of experiment, test essence Degree is high.
Embodiment two:
The present invention provides a kind of application method of liter bubble instrument as described in embodiment 1, and the liter in the embodiment steeps instrument Identical as the structure of embodiment one, working principle and beneficial effect, details are not described herein.As shown in Fig. 2, described rise steeps instrument Application method includes the following steps:
Step a: water 5 is full of into metal kettle 2 by the first pump 12 until the pressure in the metal kettle 2 is the first setting Pressure, then crude oil 4, and the shape in the glass infuser 3 are injected into glass infuser 3 with the second setting pressure by first pump 12 At oil-water interfaces 6, the second setting pressure is greater than the first setting pressure;
Step b: pressure is set with third by the second pump 10 and is pumped into gas, the third setting to gas injection needle tubing 17 Pressure is greater than the first setting pressure and is less than the second setting pressure;
Step c: opening controller 18, and two electromagnetic coils is made to generate alternate electromagnetic field, until the gas injects needle tubing The bubble 16 that 17 needle end generates is detached from the needle end under the action of alternate electromagnetic field, is then turned on camera 13 and is remembered Record.
Specifically, before on-test that is, before the step a, the power supply of all devices being connected, a liter bubble instrument is passed through The test temperature that the constant-temperature air bath device setting of outside setting needs, then sets water for the working media of the first pump 12, Reach the first setting pressure by the pressure that the first pump 12 injects in water 5 to metal kettle 2 into metal kettle 2, then pumps 12 for first Working media be changed to crude oil, and the first pump 12 is set as constant voltage mode, makes the first pump 12 to be higher than the first setting pressure The second setting pressure inject crude oil 4 into glass infuser 3 to oil-water interfaces 6, stop first and pump 12 injection into metal kettle 2, Then the second pump 10 is opened, so that the second pump 10 is set pressure with third and injects gas, such as CO into gas injection needle tubing 172Or N2, controller 18 is then opened, so that the first electromagnetic coil 8 and the second electromagnetic coil 15 is generated alternate electromagnetic field, and act on Needle end makes its concussion, and the bubble 16 of needle end is made to fall off in vibration, stop control 18, certainly, if bubble 16 does not have Fall off, can by adjusting controller 18, to increase the magnetic field strength of the first electromagnetic coil 8 and the second electromagnetic coil 15, until The bubble 16 of needle end is detached from stop control 18 again, opens camera 13 immediately later, and the rising for acquiring bubble 16 in real time is straight To the image of disappearance, the rising of multiple bubbles 16 can be recorded by test of many times, pass through the form of multiple bubbles 16 of record Variation, determines oil gas minimum miscibility pressure (MMP).
Further, in the step a, the oil-water interfaces 6 are located at the needle end of gas injection needle tubing 17 Top avoids the high pressure of crude oil 4 from hindering the abjection of bubble 16, unstable when bubble 16 also being avoided just to take off from needle end and Cause test inaccuracy.
Further, the first setting high 0.05Mpa of pressure described in the second setting pressure ratio, to guarantee that crude oil can be smoothly It injects in the glass infuser 3 with high pressure, and exists only in crude oil 4 in glass infuser 3, without the lower ending opening from glass infuser 3 Outflow;Further, in the step b, the first setting high 0.02Mpa of pressure described in the third setting pressure ratio, and Than second setting pressure it is 0.03Mpa low, make gas injection needle tubing 17 in gas both will not because in metal kettle 2 hyperbaric environment due to nothing Method enters glass infuser 3, gas will not be caused promptly to enter because gas injects needle tubing 17 with pressure difference too big in metal kettle 2 Glass infuser 3 more will not generate lifting power to uphill process of the bubble 16 in crude oil 4, make the gas in gas injection needle tubing 17 Body is deviate from controlled in the bubble 16 that needle end generates, and stroke is almost the same when bubble 16 rises in crude oil 4, ensure that test The consistency and repeatability of data.
It further, further include step b1 between the step b and the step c, when the gas injects needle tubing 17 Needle end when there is visible bubble 16, stop second pump 10, keep the bubble 16 of the generation during test big It is small consistent, it avoids the second pump 10 always on and injects gas always into gas injection needle tubing 17 and bubble 16 is caused to become larger, into And cause the bubble 16 in test not of uniform size, influence measuring accuracy and accuracy.
The characteristics of liter bubble instrument of the invention and its application method and advantage are:
1, power is provided for fluid injection by the first pump 12, water 5 is injected into metal kettle 2 with the first setting pressure, So that metal kettle 2 is provided hyperbaric environment, and pressure is set to glass infuser 3 be higher than the first setting pressure second by the first pump 12 Interior injection crude oil makes crude oil 4 and water 5 generate oil-water interfaces 6 in glass infuser 3, and the analysis for oil gas mixed phase provides simulated environment;
2, by the second pump 10 to be higher than the first setting pressure and set pressure to gas lower than the third of the second setting pressure Gas is injected in body injection needle tubing 17, until visible bubble 16 occurs in the needle end of gas injection needle tubing 17, guarantees gas The consistency for steeping 16 sizes, the stroke for making bubble 16 pass by crude oil 4 is essentially identical, facilitates carry out quantitative analysis;
3, by the monosymmetric setting electromagnetic coil in glass infuser 3, make to generate alternately electricity between two electromagnetic coils Magnetic fields shake needle end in needle end, and then control bubble 16 and fall off, and so that bubble 16 is fallen off controlled, guarantee big Small consistent bubble 16 in time, smoothly enter in crude oil 4 in glass infuser 3, and photographed to record by camera 13, with The analysis for realizing the metamorphosis in crude oil of bubble 16, determines the value of oil gas minimum miscibility pressure (MMP);
The present invention realizes the bubble 16 for the needle end for making gas injection needle tubing 17 at different temperatures and pressures in time Risen in the crude oil shedded into glass infuser 3, guarantee that bubble 16 is in the same size, bubble 16 falls off controlled, ensure that examination The consistency and repeatability tested, improve measuring accuracy, eliminate human error, solve 16 size of bubble during liter bubble It is different to lead to the problem that calculated result changes greatly, time of measuring is shortened, can be oil gas miscible displacement of reservoir mode in the big of oil field Sizable application provides strong technical support and reference data, and then improves oil recovery.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, though So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, has in any technical field Usual skill, in the range of not departing from technical solution of the present invention, when the technology contents using the disclosure above make it is a little The equivalent embodiment of equivalent variations, but anything that does not depart from the technical scheme of the invention content are changed or are modified to, according to the present invention Technical spirit any simple modification, equivalent change and modification to the above embodiments, still fall within the technology of the present invention side In the range of case.

Claims (10)

1. a kind of liter steeps instrument, which is characterized in that the liter steeps instrument and includes:
Metal kettle, one side are equipped with multiple cameras along the vertical direction, and the other side is equipped with opposite with multiple cameras Light source body;
Glass infuser is located in the metal kettle, and the upper end of the glass infuser is fixedly arranged on the roof of the metal kettle and with first Pump is connected, and the lower end of the glass infuser is opening, and the glass infuser is connected by the opening with the metal kettle;
Gas injects needle tubing, and backshank end is connected with the second pump, and the bottom wall that needle end passes through the metal kettle protrudes into the glass In glass cylinder;
Two electromagnetic coils, the electromagnetic coil are connected with controller, and two electromagnetic coils are located in the metal kettle simultaneously The two sides of the glass infuser are symmetrically set to, the electromagnetic coil is opposite with the gas injection needle end level of needle tubing, institute Stating controller alternately can individually control two electromagnetic coils and generate alternate electromagnetic field.
2. liter according to claim 1 steeps instrument, which is characterized in that the roof of the metal kettle is equipped with end cover, described Glass infuser is fixedly arranged on the end cover, and the glass infuser is connected by the end cover with first pump.
3. liter according to claim 1 steeps instrument, which is characterized in that the bottom wall of gas the injection needle tubing and the metal kettle Between be equipped with sealing silk plug.
4. liter according to claim 1 steeps instrument, which is characterized in that the electromagnetic coil is semicircle.
5. liter according to claim 1 steeps instrument, which is characterized in that the electromagnetic coil outer cladding waterproof layer.
6. a kind of such as the application method according to any one of claims 1 to 5 for rising bubble instrument, which is characterized in that the liter steeps instrument Application method include the following steps:
Step a: it is pumped by first and is full of water into metal kettle until the pressure in the metal kettle is the first setting pressure, then is led to It crosses first pump and crude oil is injected into glass infuser with the second setting pressure, and form oil-water interfaces in the glass infuser, institute It states the second setting pressure and is greater than the first setting pressure;
Step b: pressure is set with third by the second pump and enters gas to gas injection needle tube pump, the third setting pressure is greater than Described first sets pressure and is less than the second setting pressure;
Step c: opening controller, and two electromagnetic coils is made to generate alternate electromagnetic field, until the syringe needle of gas injection needle tubing The bubble that end generates is detached from the needle end under the action of alternate electromagnetic field, is then turned on camera and is recorded.
7. the application method according to claim 6 for rising bubble instrument, which is characterized in that in the step a, grease circle Face is located at the top of the needle end of gas injection needle tubing.
8. the application method according to claim 6 for rising bubble instrument, which is characterized in that in the step a, described second is set Constant-pressure is 0.05Mpa higher than the first setting pressure.
9. the application method according to claim 8 for rising bubble instrument, which is characterized in that in the step b, the third is set Constant-pressure is 0.02Mpa higher than the first setting pressure.
10. the application method according to claim 6 for rising bubble instrument, which is characterized in that in the step b and the step c Between further include step b1, when the gas injection needle tubing needle end there is visible bubble when, stop described second Pump.
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