CN116291372A - Rotatable dead volume-free high-temperature high-pressure microscopic visualization experiment device easy to detach - Google Patents

Rotatable dead volume-free high-temperature high-pressure microscopic visualization experiment device easy to detach Download PDF

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CN116291372A
CN116291372A CN202211671323.4A CN202211671323A CN116291372A CN 116291372 A CN116291372 A CN 116291372A CN 202211671323 A CN202211671323 A CN 202211671323A CN 116291372 A CN116291372 A CN 116291372A
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pressure
micro
inlet
displacement
experimental
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胡义升
蒲磊
史晨辉
庞康
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Southwest Petroleum University
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Southwest Petroleum University
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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
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/20—Displacing by water
    • 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
    • E21B47/002—Survey of boreholes or wells by visual inspection
    • 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
    • E21B47/06—Measuring temperature or pressure
    • 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
    • E21B47/06—Measuring temperature or pressure
    • E21B47/07—Temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes

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  • Fluid Mechanics (AREA)
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Abstract

A rotatable dead volume free easily detachable high temperature high pressure microscopic visualization experiment device, the device comprising: the device comprises a high-power micro-mirror, an image collector, a micro displacement pump, a high-temperature high-pressure micro reaction kettle, a single-side double-inlet micro-fluidic chip, an integrated clamp, a lighting device, an incubator, a back pressure valve, an intermediate container, a vertical constant pressure pump, a support table, a fixing frame, a reinforcing screw, a fastening screw, a handle, a rotating disc, a rotating wheel, a fixing device, a supporting rod, a first inlet and outlet, a second inlet and outlet, a secondary channel, a simulated porous medium model, a main flow channel, a third inlet and outlet, a special rubber ring and a pressure-bearing film. By utilizing the device, the problems that the disassembly steps of the experimental device are complicated, and the quick disassembly and assembly are difficult are solved while the dead holes and the air tightness are ensured at the inlet pipeline in the experimental process are solved, and the technical blank that the influence rule research of the gravity effect on the micro displacement experiment under the micrometer scale is not considered in the existing micro visual experimental device is made up.

Description

Rotatable dead volume-free high-temperature high-pressure microscopic visualization experiment device easy to detach
Technical Field
The invention relates to a rotatable dead volume-free easily-detachable high-temperature high-pressure microscopic visualization experimental device, and belongs to the technical field of petroleum natural and natural gas engineering physical experiments.
Background
Most of the difficult-to-recover petroleum is trapped in the rock stratum due to the action of capillary force, surface tension and the like of micropores and cracks in the oil reservoir and cannot be driven out by a conventional method, so that the research on the mobility of the petroleum on a microscopic scale plays a very important role in improving the petroleum recovery ratio. The micro-fluidic technology is a technology for specially researching, processing and controlling micro-nano-sized fluid, the micro-visual experimental device can easily construct a micro-sized complex flow channel, the distribution of residual oil is researched from micro-scale micro-nano level and micro-formation mechanism and distribution rule of the residual oil are known and mastered, the current situation of oil reservoir development is intuitively reproduced, and research on improving recovery ratio is carried out on the basis. Therefore, more and more students begin to try to use the microfluidic chip to perform micro displacement experiments, and research the micro seepage process of complex fluids in a micro-size model, so as to reveal the micro distribution characteristics of the fluids in the actual stratum.
The existing microscopic visual experimental devices for performing high-temperature high-pressure microscopic displacement experiments are numerous, but have some problems or limitations. Such as: the invention patent 'a glass clamping model and experimental method based on microscopic displacement experiments' (CN 114060004A), the invention patent 'a microscopic oil displacement experimental method and liquid injection method for simulating oil reservoir conditions' (CN 109441414A), the invention patent 'a porous medium microscopic seepage simulation experimental device system' (CN 103792170A), the invention patent 'a high-temperature high-pressure microscopic visual flow device and experimental method' (CN 112730196A), the invention patent 'a high-temperature high-precision microscopic displacement experimental system and experimental method' (CN 114088919A) and the like all have the problems that dead volume exists at an inlet due to residual fluid in a pipeline in the microscopic displacement process, and because fluid displacement always occurs at the dead volume at the inlet first in the microscopic displacement experimental process, the displacement process of the fluid in the porous medium cannot be observed in time in a microscope, and the image of the whole microscopic seepage process cannot be accurately obtained; the invention patent of sealing device and sealing method of a micro-displacement model injection and production port (CN 104373072A) has the problems that the steps are very complicated and the quick disassembly is not easy when the experimental device is disassembled, and the invention patent of sealing device and sealing method of a micro-displacement model injection and production port (CN 104373072B) solves the problem of complicated disassembly to a certain extent, but also leads to the reduction of the sealing tightness of the cavity of the reaction kettle due to the improvement of the sealing device; and the influence of gravity action on microscopic displacement experiments under the micrometer and nanometer scales is not considered in the existing high-temperature high-pressure microscopic visualization experiment device at present.
Aiming at the three problems, the invention provides a rotatable dead volume-free easily-detachable high-temperature high-pressure microscopic visualization experimental device, which can make up for the defects and improve the microscopic seepage experimental precision of complex fluid in a microscale model, so that the microscopic distribution characteristics of the fluid in an actual stratum are more accurately disclosed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a rotatable dead volume-free easily-detachable high-temperature high-pressure microscopic visualization experiment device, which solves the problems of complicated disassembly and air tightness of dead holes and holders in pipelines by improving holders and micro-fluidic chip injection and extraction ports; by adding the support table and the rotating wheel, the limitation that the traditional experimental device cannot simulate and consider a microscopic displacement experiment under the action of gravity is overcome. And further evaluating and analyzing the microscopic displacement experimental effect, thereby providing theoretical guidance and technical support for revealing the microscopic distribution characteristics of the fluid in the actual stratum.
The invention provides a rotatable dead volume-free easily-detachable high-temperature high-pressure microscopic visualization experiment device, which comprises: high power microscope, image collector, deionized water intermediate container, micro displacement pump and CO 2 Intermediate container, crude oil intermediate container, high-temperature high-pressure microcosmic reaction kettle, single-side double-inlet microfluidic chip and integrated clampThe device comprises a lighting device, a constant temperature box, a test tube, a back pressure valve and N 2 The device comprises an intermediate container, a flowmeter, a vertical constant pressure pump, a three-way valve, a heating sleeve, a valve, a pressure gauge, a support table, a fixing frame, reinforcing screws, fastening screws, a handle, a rotating disc, a rotating wheel, a fixer, a supporting rod, a first inlet and outlet, a second inlet and outlet, a secondary channel, a simulated porous medium model, a main flow channel, a third inlet and outlet, a special rubber ring and a pressure-bearing film. The high-temperature high-pressure microscopic reaction kettle, the high-power microscope and the lighting device are fixed on a rotating wheel connected with a bracket table through a supporting rod and a fixing frame. The unilateral double-inlet microfluidic chip is fixed in an integrated clamp in a high-temperature high-pressure microscopic reaction kettle, and the kettle body is sealed by a fastening screw. The rotating handle drives the rotating wheel to rotate so as to rotate the high-temperature high-pressure microscopic reaction kettle, the high-power microscope and the lighting device to a proper angle. The two inlets of the microfluidic chip and the high-temperature high-pressure reaction kettle are connected with the intermediate container, the pressure gauge and the micro displacement pump through the three-way valve, the outlet is connected with the back pressure valve, the intermediate container and the back pressure constant pressure pump, and the heating sleeve is placed outside the reaction kettle and is tightly attached to the kettle body to be connected with the constant temperature box.
The unilateral double-opening microfluidic chip is characterized in that two independent inlet channels are arranged on the inlet side of the unilateral double-opening microfluidic chip and are embedded with a clamp, and fluid flows to a main flow channel through a secondary channel to carry out displacement experiments in a simulated porous medium model.
The integrated clamp used by the invention is characterized in that the integrated clamp is designed in the cavity of the reaction kettle, so that the problems that the steps are very complicated and the rapid disassembly and assembly are difficult when the traditional clamp is disassembled are solved; meanwhile, the problem that the air tightness is reduced due to the fact that the hole is formed in the joint of the kettle body and the pump of the traditional reaction kettle is solved, and the experimental system can be kept at constant temperature and pressure in the micro-displacement process. In addition, the bottom of the inlet side of the integrated clamp is provided with two fluid channels for being embedded with the inlet of the unilateral double-opening microfluidic chip, the embedded part is sealed by a displacement inlet by adopting a conventional rubber ring, the displacement fluid inlet is sealed by using a disposable special rubber ring, and a pressure-bearing film with a certain pressure-bearing capacity is arranged inside the special rubber ring. Utilizing a micro displacement pump and an intermediate container to establish the internal pressure and confining pressure at two inlets of the single-side double-inlet microfluidic chip to experimental pressure; and (3) using simulated sample displacement fluid under experimental pressure, increasing the pressure difference at two inlets through a micro displacement pump to break the membrane, and completing the direct contact of the sample and the injection fluid to realize the real-time observation of micro displacement.
The high-temperature high-pressure microscopic reaction kettle is fixed on the rotating wheel through the fixing device and the supporting rod, and the high-power micro mirror and the lighting device are fixed at the corresponding positions of the upper window and the lower window of the reaction kettle through the fixing frame. The micro displacement mechanism under the action of gravity is simulated and considered by changing the angle of the rotating wheel through the handle and the rotating disk connected with the handle in the experimental preparation stage.
Specifically, the preparation of the unilateral double-opening microfluidic chip comprises the following steps in sequence:
etching a first groove, a second groove, a first inlet and a second outlet which are communicated with the first groove and the second groove on the right end of the unilateral double-opening microfluidic chip;
etching a third groove on the left end of the single-side double-opening microfluidic chip and a third inlet and outlet communicated with the second groove;
adjacent first inlets and outlets and second inlets and outlets in the unilateral double-opening microfluidic chip are connected through secondary fluid channels, and simulated actual stratum models are connected with third inlets and outlets through secondary fluid channels respectively through main flow channels.
Simulation of porous media model: based on the optimal selection and combination of the two-dimensional CT scanning images of the plunger rock sample required by the experiment, a corresponding microscopic slice etching model is established.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the invention, by improving the structure of the reaction kettle and designing the integrated clamp in the cavity of the reaction kettle, the problems that the steps are very complicated and the rapid disassembly and assembly are difficult when the traditional clamp is disassembled are solved; meanwhile, the problem that the air tightness is reduced due to the fact that the hole is formed in the joint of the kettle body and the pump of the traditional reaction kettle is solved, and the experimental system can be kept at constant temperature and pressure in the micro-displacement process.
(2) According to the invention, by improving the micro-fluidic chip injection and extraction port, a dual channel is designed at the injection port, a special rubber ring is utilized to seal the displacement fluid inlet, and only when the pressure difference between the displacement fluid and the displaced fluid reaches a certain limit, the displacement fluid breaks through the pressure-bearing film, so that a micro-displacement experiment is started. The design solves the problem that research data of the fluid displacement process cannot be accurately obtained when experimental phenomena are not observed urgently due to dead holes in a pipeline in a conventional microscopic displacement experiment.
(3) According to the invention, the support table and the rotating wheel are added, the reaction kettle, the high-power microscope and the lighting device are fixed on the rotating wheel at corresponding positions through the fixing frame, the rotating wheel is fixed in the support table through the supporting rod and the fixing device, and the microscopic displacement experiment under the action of gravity is simulated by changing the angle of the rotating wheel through the handle and the rotating disk.
Drawings
Fig. 1 is a schematic structural diagram of a rotatable, dead-volume-free, easily detachable, high-temperature and high-pressure microscopic visualization experimental apparatus according to an embodiment of the invention.
FIG. 2 is a schematic diagram of a special rubber ring according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a single-sided dual-inlet microfluidic chip according to one embodiment of the present invention;
reference numerals illustrate: 1-high power microscope; 2-an image collector; 3-deionized water intermediate container; 4. 5-a micro displacement pump; 6-CO 2 An intermediate container; 7-a crude oil intermediate vessel; 8-a high-temperature high-pressure microcosmic reaction kettle; 9-single-sided dual-inlet microfluidic chip; 10-an integral holder; 11-an illumination device; 12-a constant temperature box; 13-test tube; 14-back pressure valve; 15-N 2 An intermediate container; 16-a flow meter; 17-vertical constant pressure pump; 18. 19, 20, 21, 22, 23-three-way valves; 24-heating the sleeve; 25. 26, 27, 28, 29, 30, 31-valves; 32. 33, 34, 35, 36-pressure gauges; 37-support stand; 38-fixing frame; 39-reinforcing screws; 40-tightening the screw; 41-handles, 42-rotating discs, 43-rotating wheels, 44-retainers and 45-supporting rods; 46-a first access opening; 47-a second doorway; 48-secondary channel; 49-simulated porous media model; 50-main flow channel; 51-thirdAn access opening; 52-special rubber rings; 53-pressure-bearing film.
Detailed Description
The invention is further described below with reference to the drawings and examples to facilitate an understanding of the invention by those skilled in the art. It should be understood that the invention is not limited to the precise embodiments, and that various changes may be effected therein by one of ordinary skill in the art without departing from the spirit or scope of the invention as defined and determined by the appended claims.
Rotatable dead volume-free easily-detachable high-temperature high-pressure microscopic visualization experimental device: high-power microscope (1), image collector (2), deionized water intermediate container (3), micro displacement pump (4, 5), CO 2 Intermediate container (6), crude oil intermediate container (7), high-temperature high-pressure micro reaction kettle (8), single-side double-inlet micro-fluidic chip (9), integrated clamp holder (10), lighting device (11), incubator (12), test tube (13), back pressure valve (14), N 2 The device comprises an intermediate container (15), a flowmeter (16), a vertical constant pressure pump (17), three-way valves (18, 19, 20, 21, 22, 23), a heating sleeve (24), valves (25, 26, 27, 28, 29, 30, 31), pressure gauges (32, 33, 34, 35, 36), a bracket table (37), a fixing frame (38), a reinforcing screw (39), a fastening screw (40), a handle (41), a rotating disc (42), a rotating wheel (43), a fixer (44), a supporting rod (45), a first inlet and outlet (46), a second inlet and outlet (47), a secondary channel (48), a simulated porous medium model (49), a main flow channel (50), a third inlet and outlet (51), a special rubber ring (52) and a pressure-bearing film (53).
The single-sided double-opening microfluidic chip (9) is characterized in that two independent first inlets (46) and two independent second inlets (47) are arranged on the inlet side, the inlets are embedded with the integrated clamp holder (10), and fluid flows to the main flow channel (50) through the secondary channel (48) in the experimental process to perform displacement experiments in the simulated porous medium model (49).
Above-mentioned integral type holder (10), its one feature like shown in fig. 1 is at the internal design integral type holder (10) in reation kettle chamber (8), avoids traditional reation kettle to link to each other the department trompil at the cauldron body and pump and leads to the problem that the gas tightness reduces, and the fixed microfluidic chip (9) of integral type holder (10) are also easier quick dismantlement simultaneously. The other characteristic is that two fluid channels are arranged at the bottom of the inlet side of the integrated clamp holder (10) and are used for being embedded with the inlet of the unilateral double-opening microfluidic chip (9), the embedded part is sealed by a displacement inlet through a conventional rubber ring, the displacement fluid inlet is sealed by a disposable special rubber ring (52), and a pressure-bearing film (53) with the upper bearing limit of 1MPa is arranged inside the special rubber ring.
As shown in FIG. 1, a high-temperature high-pressure micro reaction kettle (8) is fixed in a rotating wheel (43) through a fixer (44) and a supporting rod (45), a high-power microscope (1) and a lighting device (2) are fixed at the corresponding positions of an upper window and a lower window of the reaction kettle through a fixing frame (38), and a handle (41) and a rotating disc (42) are designed on the right side of the supporting rod (45) connected with a bracket table (37).
In the experimental preparation stage, as shown in fig. 1, an experimental device is connected, a unilateral double-opening microfluidic chip (9) is fixed on an integrated clamp holder (10) in a high-temperature high-pressure reaction kettle (8) by using a reinforcing screw (39) and a rubber ring, and the kettle body is sealed by using a fastening screw (40); the first inlet and outlet (46) and the second inlet and outlet (47) of the unilateral dual-inlet microfluidic chip are respectively connected with CO through three-way valves (18, 19) 2 The intermediate container (6), the crude oil intermediate container (7) and the pressure gauges (35, 36) are connected; CO 2 The intermediate container (6) and the crude oil intermediate container (7) are connected with the micro displacement pump (5) through a three-way valve (21); the micro displacement pump (4) and the deionized water intermediate container (3) are connected with the confining pressure inlet through a three-way valve (20); the third inlet and outlet (51) of the unilateral dual-inlet microfluidic chip (9) is connected with the back pressure valve (14) and the pressure gauge (33) through the three-way valve (22); n (N) 2 The intermediate container (15) and the back pressure constant pressure pump (17) provide back pressure for the back pressure valve (14), and a test tube (13) and a flowmeter (16) are arranged at the lower end of the back pressure valve (14); the high-temperature high-pressure microscopic reaction kettle (8) is characterized in that the outer part of the kettle body is tightly attached to a heating sleeve (24) and is connected with a constant temperature box (12), a high-power microscope (1) is connected with an image collector (2), and the angle of a rotating wheel (43) is changed through a handle (41) and a rotating disc (42) connected with the handle to simulate and consider a microscopic displacement mechanism under the action of gravity.
When the experiment starts, the temperature of the high-temperature high-pressure micro reaction kettle (8) is regulated to the simulation temperature by utilizing the constant temperature box (12) and the heating sleeve (24); after the temperature is stable, the preparation methodCO from intermediate container (3) with micro displacement pump (4, 5) and deionized water 2 The middle container (7) and the crude oil middle container (6) simultaneously establish a single-side double-inlet micro-fluidic chip at the speed of 0.0005mL/min and respectively communicate with the crude oil middle container (6) and CO 2 The internal pressure and the confining pressure of the second inlet (47) and the first inlet (46) connected with the intermediate container (7) reach the simulated pressure, and the CO is maintained in the process 2 The pressure difference between the oil and the crude oil is not more than 1MPa, and the internal pressure and the confining pressure are kept not more than 2MPa; use of vertical constant pressure pumps (17) 17, N) at the outlet end while establishing internal pressure 2 The intermediate container (15) applies a back pressure which is always higher than the confining pressure and the internal pressure by about 3 MPa; after the pressure is stable, the valves (27, 29) at the upper end and the lower end of the crude oil intermediate container (6) and the corresponding valves of the three-way valves (21, 18) connected with the valves are closed, and the micro displacement pump (5) is used for carrying out CO at the speed of 0.0001mL/min 2 Pressurization is carried out to increase CO in single-side double-inlet micro-fluidic chip (9) 2 Differential pressure with crude oil until breaking up CO 2 Pressure-bearing film (53) at end-made rubber ring (52), CO 2 Performing microscopic displacement experiments on crude oil in a simulated porous medium model (49) through a main flow channel (50) by flowing through a secondary channel (48), and recording the displacement process in real time through a high-power microscope (1) and an image acquisition device (2) until the experiment is finished; and finally, unloading the pressure of the whole system by using the micro displacement pumps (4, 5) and the vertical constant pressure pump (17), and dismantling the intermediate container and the pipeline to analyze data.

Claims (8)

1. Rotatable no dead volume quick detachable high temperature high pressure microscopic visualization experimental apparatus, characterized in that includes: high-power microscope (1), image collector (2), deionized water intermediate container (3), micro displacement pump (4, 5), CO 2 Intermediate container (6), crude oil intermediate container (7), high-temperature high-pressure micro reaction kettle (8), single-side double-inlet micro-fluidic chip (9), integrated clamp holder (10), lighting device (11), incubator (12), test tube (13), back pressure valve (14), N 2 Intermediate container (15), flowmeter (16), vertical constant pressure pump (17), three-way valve (18, 19, 20, 21, 22, 23), heating jacket (24), valve (25, 26, 27, 28, 29, 30, 31), pressure gauge (32, 33, 34, 35, 36), bracket table (37), fixing bracket (38), reinforcing screw (39), fastening screw (4)0) The device comprises a handle (41), a rotating disc (42), a rotating wheel (43), a fixer (44), a supporting rod (45), a first inlet and outlet (46), a second inlet and outlet (47), a secondary channel (48), a simulated porous medium model (49), a main flow channel (50), a third inlet and outlet (51), a special rubber ring (52) and a pressure-bearing film (53).
2. The single-sided double-opening microfluidic chip according to claim 1, wherein the single-sided double-opening microfluidic chip is provided with two independent first inlets and two independent second inlets and outlets on an inlet side, the inlets are embedded with the integrated holder, and fluid flows to a main flow channel through a secondary channel in the experimental process to perform displacement experiments in the simulated porous medium model.
3. The simulated porous media model of claim 2, wherein the etched simulated porous media model is not unique and can be optimized and combined according to experimentally required two-dimensional CT scan images of the rock sample to create a corresponding microscopic slice etch model.
4. The experimental device according to claim 1, wherein the high-temperature and high-pressure micro-reaction kettle is fixed in the rotating wheel through a fixer and a supporting rod, the high-power micro-mirror and the lighting device are fixed at the corresponding positions of the upper window and the lower window of the reaction kettle through a fixing frame, a handle and a rotating disc are designed on the right side of the supporting rod connected with the support table, and the angle of the rotating wheel is changed through the handle and the rotating disc connected with the handle to simulate a micro-displacement mechanism under the action of gravity.
5. The high-temperature high-pressure micro-reaction kettle according to claim 4, wherein a heating sleeve is sleeved outside the kettle body and connected with a constant temperature box, and the temperature of the device is adjusted to be the simulation temperature.
6. The integrated clamp holder according to claim 1, wherein the integrated clamp holder is designed in the reaction kettle cavity, so that the problem that the air tightness of the traditional reaction kettle is reduced due to the fact that holes are formed in the joint of the kettle body and the pump is avoided, and the microfluidic chip is easy to detach quickly when the integrated clamp holder is used for fixing the microfluidic chip.
7. The integrated holder according to claim 6, wherein two fluid channels are provided at the bottom of the inlet side of the integrated holder for being engaged with the inlet of the single-sided double-opening microfluidic chip, the engaged position is sealed by a displacement inlet using a conventional rubber ring, the displacement fluid inlet is sealed by a disposable special rubber ring, and a pressure-bearing film is provided inside the special rubber ring.
8. The special rubber ring seal according to claim 7, wherein the micro displacement pump and the intermediate container are used for establishing the internal pressure and confining pressure at two inlets of the single-side double-inlet microfluidic chip to the experimental pressure at the beginning of an experiment, the pressure difference at the two inlets is increased by about 1MPa through the micro displacement pump by using the simulated sample displacement fluid under the experimental pressure to burst the pressure-bearing film in the rubber ring seal, and the direct contact of the sample and the injected fluid is completed to realize the real-time observation of micro displacement.
CN202211671323.4A 2022-12-26 2022-12-26 Rotatable dead volume-free high-temperature high-pressure microscopic visualization experiment device easy to detach Pending CN116291372A (en)

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