CN210221870U - Multifunctional displacement experimental device capable of combining CT scanning - Google Patents
Multifunctional displacement experimental device capable of combining CT scanning Download PDFInfo
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- CN210221870U CN210221870U CN201921156718.4U CN201921156718U CN210221870U CN 210221870 U CN210221870 U CN 210221870U CN 201921156718 U CN201921156718 U CN 201921156718U CN 210221870 U CN210221870 U CN 210221870U
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Abstract
The utility model discloses a can combine CT scanning's multi-functional displacement experimental apparatus, include: the device comprises a holder, a confining pressure loading system, a displacement system and an oil displacement separation metering system; the clamp comprises a cylinder body, an upper force transmission end head, a lower force transmission end head, a circumferential pressure-bearing carbon fiber sleeve and an axial pressure-bearing carbon fiber sleeve, wherein a sealing pressing block and a compression nut are arranged in an inner cavity of the upper force transmission end head; the displacement system comprises a liquid storage tank, a displacement pump, an intermediate container, a high-pressure gas storage bottle and a displacement input pressure sensor. The utility model provides a displacement experimental apparatus can not only use with the CT scanning cooperation, can realize carrying out the displacement experiment of gas, single liquid, three kinds of types of liquid medicament moreover on one set of experimental apparatus to can carry out the triaxial experiment to the sample after the displacement experiment after then, functional and commonality are very strong.
Description
Technical Field
The utility model relates to a displacement experimental apparatus, specifically say so, relate to a can combine CT scanning's multi-functional displacement experimental apparatus.
Background
The displacement experiment is a standard method for evaluating related methods of oil and gas exploitation, and is characterized in that a core or a thin pipe is saturated by an experimental fluid in a displacement experiment simulation device, the outlet pressure of a system is kept by a back pressure valve, and the displacement fluid is injected into the core or the thin pipe by an injection pump to carry out the displacement experiment, so that the influence of the type of a displacement agent (mainly including three types of displacement agents, namely gas, single liquid and liquid medicaments), the displacement pressure, the core or thin pipe parameters, other chemical additives and the like on the displacement effect is evaluated, various displacement agents are screened, and reliable experimental technical data are provided for improving the recovery ratio for oil and gas field development. However, the existing displacement experiment basically remains in macroscopic test, the knowledge of the oil gas property change and the seepage mechanism can only be speculated and finished according to the macroscopic phenomenon and a certain theory of the experiment, and the accurate knowledge and microscopic visual observation of the underground oil gas microscopic seepage mechanism cannot be realized. Although the existing research shows that the CT scanning technology can realize the representation and nondestructive monitoring of the microstructure in the sample, the X-ray tube and the detector are fixed during the CT scanning, and the high-precision rotating platform rotates an object to perform the CT scanning, and the existing displacement experiment device has the problems of large volume, heavy weight, complex structure and the like, so that the combined use with the CT scanning technology is influenced, and the real-time microscopic monitoring of the sample in the displacement experiment process is difficult to realize. In addition, the existing displacement experiment device has single function and cannot be used for displacement experiments of different displacement agent types at the same time, and a sample after the displacement experiment cannot be subjected to a triaxial experiment at the same time, so that the experiment cost is increased and the waste of sample resources is caused.
SUMMERY OF THE UTILITY MODEL
The above-mentioned problem to prior art exists, the utility model aims at providing a can combine CT scanning's multi-functional displacement experimental apparatus, not only can realize that one set of experimental apparatus can carry out the displacement experiment of three kinds of displacement agent types of gas, single liquid and liquid medicament simultaneously, can realize moreover that the sample after the displacement experiment continues to carry out the triaxial experiment.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a multifunctional displacement experimental device capable of combining CT scanning comprises: the gripper comprises a cylinder, an upper force transmission end head, a lower force transmission end head, a circumferential pressure-bearing carbon fiber sleeve and an axial pressure-bearing carbon fiber sleeve, wherein a sealing pressing block hermetically connected with the upper end part of the cylinder and a compression nut in threaded connection with the inner wall of the upper force transmission end head are arranged in an inner cavity of the upper force transmission end head, a through hole A which is coaxially communicated is formed in the centers of the sealing pressing block and the compression nut, a T-shaped piston which is hermetically connected with the lower end part of the cylinder and can axially move is arranged in an inner cavity of the lower force transmission end head, and a through hole B is formed in the center of the T-shaped piston; the displacement system comprises a liquid storage tank, a displacement pump, an intermediate container, a high-pressure gas storage bottle and a displacement input pressure sensor, wherein an inner cavity of the intermediate container is divided into a lower cavity and an upper cavity by a sealing piston, wherein: the liquid inlet of the displacement pump is connected with the liquid storage tank through a pipeline, the liquid outlet of the displacement pump is respectively connected with the lower cavity of the intermediate container and the through hole B through a pipeline, the displacement input pressure sensor is connected in series with the pipeline between the displacement pump and the through hole B, the upper cavity of the intermediate container and the gas outlet of the high-pressure gas storage bottle are connected in parallel with the pipeline between the displacement pump and the displacement input pressure sensor through pipelines, the gas valve and the gas flowmeter are sequentially arranged at the gas outlet of the high-pressure gas storage bottle, the pipeline between the upper cavity of the intermediate container and the displacement input pressure sensor is provided with a liquid medicament output pressure sensor, and the inlet of the lower cavity and the outlet of the upper cavity are respectively provided with a switch valve.
According to one embodiment, the oil displacement separation metering system comprises a closed collector, a buffer tank with an opening at the bottom, a mixed oil collecting funnel, a mixed oil collecting container and an oil displacement collecting container, wherein the closed collector and the mixed oil collecting funnel are connected with a through hole A through pipelines, the bottom of the closed collector is communicated with an inner cavity of the buffer tank through a pipeline, and an opening at the bottom of the buffer tank is communicated with the mixed oil collecting funnel; and the mixed oil collecting container and the oil displacement collecting container are respectively fixed on an independent electronic scale, a mixed oil receiving funnel and an oil displacement output pipe are arranged at the top of the mixed oil collecting container, the mixed oil receiving funnel is positioned under the mixed oil collecting funnel, and the oil displacement output pipe is communicated with the oil displacement collecting container.
The utility model provides a preferred scheme, airtight collector has 2, and the bottom of every airtight collector all is linked together through the inner chamber of independent pipeline with the buffer tank, all independently is equipped with solenoid valve switch and pressure transmitter on the input pipeline of every airtight collector, all independently is equipped with the emission solenoid valve on the output pipeline of every airtight collector.
According to a preferable scheme, a displacement output pressure sensor, an automatic pressure regulating valve and a pressure reducing valve are sequentially connected in series on an output pipeline of the through hole A, and the output end of the pressure reducing valve is connected with an electromagnetic valve switch of the closed collector through a pipeline.
According to the optimal scheme, an electromagnetic valve is arranged at an outlet of the mixed oil collecting funnel, and an oil outlet of the electromagnetic valve is communicated with the mixed oil receiving funnel.
According to one embodiment, the circumferential pressure-bearing carbon fiber sleeve is arranged on the circumferential direction of the outer wall of the cylinder body.
According to one embodiment, an upper convex bearing shoulder is arranged at the lower part of an upper force transmission end, a lower convex bearing shoulder is arranged at the upper part of a lower force transmission end, and the axial bearing carbon fiber sleeve is obtained by wrapping, winding and curing carbon fibers on the upper and lower bearing shoulders in a winding direction inclined to the axial direction through resin.
In another embodiment, at least one group of cantilevers which form central symmetry are arranged on the periphery of the lower part of the upper force transmission end and the periphery of the upper part of the lower force transmission end, the cantilevers positioned on the upper force transmission end and the cantilevers positioned on the lower force transmission end form mirror symmetry, and the axial pressure-bearing carbon fiber sleeve is obtained by winding and curing carbon fibers on the upper cantilevers and the lower cantilevers which form mirror symmetry in the winding direction parallel to the axial direction through resin.
According to the optimal scheme, 2-4 cantilevers which are centrosymmetric are arranged on the upper force transmission end and the lower force transmission end.
In a further preferred scheme, the cantilevers positioned on the upper force transmission end and the lower force transmission end are respectively in an integrally formed structure with the cantilevers.
The utility model provides an embodiment, be mosaic structure between barrel and last power end and the lower power end of biography to, at last power end and the barrel of passing the junction and the junction of lower power end and barrel all be equipped with the sealing washer.
In another embodiment, the cylinder body and the upper force transmission end head and the lower force transmission end head are in an integrally formed structure.
According to a preferred scheme, the upper force transmission end head and the lower force transmission end head are both cylindrical barrels sharing a central shaft with the barrel body.
According to the optimal scheme, the head of the T-shaped piston is provided with a sealing groove, and a sealing ring with the outer diameter matched with the diameter of an inner cavity of the lower force transmission end is arranged in the sealing groove.
According to one embodiment, the lateral part of the upper force transmission end is provided with a confining pressure liquid outlet hole communicated with the confining pressure cavity, the lateral part of the lower force transmission end is provided with a confining pressure liquid injection hole communicated with the confining pressure cavity, and the confining pressure liquid outlet hole and the confining pressure liquid injection hole are respectively connected with a confining pressure loading system in a closed loop mode through pipelines.
The utility model provides an embodiment, confining pressure loading system includes infusion pump, confining pressure liquid storage tank and automatic air-vent valve, the oil inlet of infusion pump is connected with the confining pressure liquid storage tank through the pipeline, the oil-out of infusion pump is connected with confining pressure liquid injection hole through the pipeline, the confining pressure liquid discharge hole is connected with the confining pressure liquid storage tank through the pipeline, automatic air-vent valve concatenates on the pipeline between confining pressure liquid discharge hole and confining pressure liquid storage tank.
The utility model provides a preferred scheme, confining pressure loading system still includes feed liquor pressure sensor and goes out liquid pressure sensor, feed liquor pressure sensor concatenates on the pipeline between liquid charge pump and confining pressure liquid injection hole, it concatenates on the pipeline between confining pressure liquid outflow hole and the automatic air-vent valve to go out liquid pressure sensor.
One embodiment further comprises a loading cylinder, the main portion of the T-shaped piston is located in the loading cylinder, and the loading cylinder is detachably and fixedly connected with the lower force transmission end.
In a preferable scheme, the loading cylinder is in threaded connection with the lower force transmission end.
Further preferred scheme, load the cylinder with pass through double thread flange between the power end under with and be connected, promptly: the double-thread flange is in threaded connection with the opening of the loading cylinder, and the lower force transmission end is in threaded connection with the double-thread flange.
In a further embodiment, a hydraulic oil conveying channel is arranged at the bottom of the loading cylinder, an inner port of the hydraulic oil conveying channel is communicated with an inner cavity of the loading cylinder, and an outer port of the hydraulic oil conveying channel is connected with an external axial pressure loading system through a pipeline.
In a further embodiment, the axle load system comprises a hydraulic oil tank, a hydraulic oil pump and a pressure sensor, wherein an oil inlet of the hydraulic oil pump is connected with a pipeline of the hydraulic oil tank, an oil outlet of the hydraulic oil pump is connected with an external port of the hydraulic oil conveying channel through a pipeline, and the pressure sensor is arranged on a pipeline connected with the external port of the hydraulic oil pump and the external port of the hydraulic oil conveying channel.
Compared with the prior art, the utility model discloses following beneficial technological effect has:
because the clamp holder is provided with the circumferential pressure-bearing carbon fiber sleeve and the axial pressure-bearing carbon fiber sleeve, the axial stress and the circumferential stress can be completely separated and do not influence each other, the clamp holder can simultaneously bear high confining pressure and high axial load, and has no influence on ray penetrability, and the light weight can be realized; therefore, the displacement experimental device provided by the utility model can be used in cooperation with CT scanning, and during the experiment, only the clamper or the assembly body of the clamper and the loading cylinder is put on a rotary table in the CT machine, wherein the confining pressure loading system, the displacement system and the oil displacement separation metering system are not required to be placed in a CT machine, and are only required to be respectively connected with the holder and the loading cylinder through pipelines, so that the device is convenient to use and simple to operate, can realize real-time monitoring of microstructure change of the sample in the displacement experiment process by utilizing the CT scanning technology, but also can realize the displacement experiment of three displacement agent types of gas, single liquid and liquid medicament by one set of experimental device, the sample after the displacement experiment can be subjected to a triaxial experiment to obtain the change of the microstructure of the sample from the original state to the crushed whole stage, so that a perfect experimental basis is provided for the exploitation research of petroleum and natural gas; therefore, multi-functional displacement experimental apparatus, the commonality is very strong, has important value to oil and gas's exploitation research.
Drawings
Fig. 1 is a schematic structural diagram of a multifunctional displacement experimental apparatus capable of combining CT scanning provided in embodiment 1;
FIG. 2 is a schematic structural diagram of the flooding separation metering system in example 1;
FIG. 3 is a schematic structural diagram of another multifunctional displacement experimental device capable of combining with CT scanning provided in example 2;
FIG. 4 is a schematic perspective view of a holder according to embodiment 3;
figure 5 is a schematic view of the arrangement of the cartridge, the upper and lower force transfer tips and the assembly between them as described in example 3.
The numbers in the figures are as follows: 100. a holder; 101. a barrel; 102. an upper force transmission end socket; 1021. an upper bearing shoulder; 103. a lower force transfer end; 1031. a lower force bearing shoulder; 1032. an external thread; 104. a circumferential pressure-bearing carbon fiber sleeve; 105. an axial pressure-bearing carbon fiber sleeve; 106. sealing and pressing the block; 107. a compression nut; 108. a through hole A; 109. a confining pressure cavity; 110. a confining pressure liquid outflow hole; 111. a T-shaped piston; 112. a through hole B; 113. a confining pressure liquid injection hole; 114. a cantilever; 114a, a cantilever on the upper power head; 114b, a cantilever on the lower force transfer end; 200. a confining pressure loading system; 201. a liquid injection pump; 202. a confining pressure liquid storage tank; 203. an automatic pressure regulating valve; 204. a liquid inlet pressure sensor; 205. a liquid outlet pressure sensor; 300. a displacement system; 301. a liquid storage tank; 302. a displacement pump; 303. a displacement input pressure sensor; 304. an intermediate container; 3041. a sealing piston; 3042. a lower cavity; 3043. an upper cavity; 305a/305b, a switching valve; 306. a high pressure gas cylinder; 307. an air valve; 308. a gas flow meter; 309. a liquid medicament output pressure sensor; 400. an oil displacement separation metering system; 401/401a/401b, a closed collector; 402. a buffer tank; 403. a mixed oil collecting funnel; 404. a mixed oil collecting container; 405. an oil displacement collection container; 406. an electronic scale A; 407. an electronic scale B; 408. a mixed oil receiving funnel; 409. an oil displacement output pipe; 410a/410b, electromagnetic valve switch; 411a/411b, pressure transmitter; 412a/412b, a discharge solenoid valve; 413. a displacement output pressure sensor; 414. an automatic pressure regulating valve; 415. a pressure reducing valve; 416. an electromagnetic valve; 500. a loading cylinder; 501. an internal thread; 502. a double-threaded flange; 503. a hydraulic oil delivery passage; 5031. an inner port of the hydraulic oil delivery passage; 5032. an outer port of the hydraulic oil delivery passage; 504. an inner cavity of the loading cylinder; 600. a shaft pressure loading system; 601. a hydraulic oil tank; 602. a hydraulic oil pump; 603. a pressure sensor; 700. a sample; A1/A2 and a sealing ring.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
Example 1
Please refer to fig. 1: the multi-functional displacement experimental apparatus that this embodiment provided can combine CT scanning includes: the gripper 100 comprises a cylinder 101, an upper force transmission end 102 and a lower force transmission end 103 which are respectively connected with two ends of the cylinder 101, a circumferential pressure-bearing carbon fiber sleeve 104 and an axial pressure-bearing carbon fiber sleeve 105 are arranged outside the cylinder 101, a sealing pressing block 106 which is hermetically connected with the upper end of the cylinder 101 and a gland nut 107 which is in threaded connection with the inner wall of the upper force transmission end 102 are arranged in the inner cavity of the upper force transmission end 102, a through hole A108 which is coaxially communicated with each other is arranged at the center of the sealing pressing block 106 and the gland nut 107, a confining pressure liquid outflow hole 110 which is communicated with a confining pressure cavity 109 is arranged at the side of the upper force transmission end 102, a sealing groove which is hermetically connected with the lower end of the cylinder 101 is arranged in the inner cavity of the lower force transmission end 103 (specifically, in the embodiment, a sealing groove is arranged at the head of a T-shaped piston 111, a sealing ring A1 with the outer diameter matched with the inner cavity diameter of the lower force transmission end head 103) and a T-shaped piston 111 capable of moving axially are arranged in the sealing groove, a through hole B112 is formed in the center of the T-shaped piston 111, and a confining pressure liquid injection hole 113 communicated with the confining pressure cavity 109 is formed in the side portion of the lower force transmission end head 103.
In this embodiment:
the barrel 101 is spliced with the upper force transmission end 102 and the lower force transmission end 103 (of course, an integrally formed structure can be adopted), and sealing rings A2 are arranged at the joint of the upper force transmission end 102 and the barrel 101 and the joint of the lower force transmission end 103 and the barrel 101. Both the upper force transfer tip 102 and the lower force transfer tip 103 are cylindrical with a common central axis with the barrel 101. An upper convex bearing shoulder 1021 is arranged at the lower part of the upper force transmission end 102, a lower convex bearing shoulder 1031 is arranged at the upper part of the lower force transmission end 103, and the axial pressure-bearing carbon fiber sleeve 105 is obtained by wrapping, winding and curing carbon fibers on the upper bearing shoulder 1021 and the lower bearing shoulder 1031 in a winding direction which is inclined with the axial direction (i.e. forms an acute angle with the axial direction) through resin. In addition, the circumferential pressure-bearing carbon fiber sleeve 104 is provided in the circumferential direction of the outer wall of the cylinder 101, and is specifically obtained by winding and solidifying carbon fibers on the outer circumferential wall of the cylinder 101 in the circumferential direction through resin.
The confining pressure loading system 200 includes: the automatic pressure regulating valve comprises a liquid injection pump 201, a confining pressure liquid storage tank 202, an automatic pressure regulating valve 203, a liquid inlet pressure sensor 204 and a liquid outlet pressure sensor 205, wherein an oil inlet of the liquid injection pump 201 is connected with the confining pressure liquid storage tank 202 through a pipeline, an oil outlet of the liquid injection pump 201 is connected with a confining pressure liquid injection hole 113 through a pipeline, a confining pressure liquid outlet hole 110 is connected with the confining pressure liquid storage tank 202 through a pipeline, the automatic pressure regulating valve 203 is connected in series on the pipeline between the confining pressure liquid outlet hole 110 and the confining pressure liquid storage tank 202, the liquid inlet pressure sensor 204 is connected in series on the pipeline between the liquid injection pump 201 and the confining pressure liquid injection hole 113, and the liquid outlet pressure sensor 205 is connected in series on the pipeline between the confining pressure liquid outlet hole 110.
The displacement system 300 includes: the system comprises a liquid storage tank 301, a displacement pump 302, a displacement input pressure sensor 303, an intermediate container 304 and a high-pressure gas storage bottle 306, wherein the inner cavity of the intermediate container 304 is divided into a lower cavity 3042 and an upper cavity 3043 by a sealing piston 3041, a switch valve 305a is arranged at the inlet of the lower cavity 3042, and a switch valve 305b is arranged at the outlet of the upper cavity 3043; a liquid inlet of the displacement pump 302 is connected with the liquid storage tank 301 through a pipeline, a liquid outlet of the displacement pump 302 is respectively connected with the lower cavity 3042 of the intermediate container 304 and the through hole B112 through a pipeline, the displacement input pressure sensor 303 is connected in series with the pipeline between the displacement pump 302 and the through hole B112, an upper cavity 3043 of the intermediate container 304 and an air outlet of the high-pressure gas storage bottle 306 are both connected in parallel with the pipeline between the displacement pump 302 and the displacement input pressure sensor 303 through pipelines, an air valve 307 and a gas flow meter 308 are sequentially arranged at the air outlet of the high-pressure gas storage bottle 306, and a liquid medicament output pressure sensor 309 is arranged on the pipeline between the upper cavity 3043 of the intermediate container 04 and the displacement input pressure sensor 303.
Referring to fig. 2, the oil displacement separation metering system 400 includes: closed collectors 401 (2 are adopted in the embodiment, and the requirements of continuous experiments are met through the cyclic alternation between 401a and 401 b), a buffer tank 402 with an open bottom, a mixed oil collecting funnel 403, a mixed oil collecting container 404 and an oil displacement collecting container 405, wherein the bottom of each closed collector 401a/401b is communicated with the inner cavity of the buffer tank 402 through an independent pipeline, and the opening at the bottom of the buffer tank 402 is communicated with the mixed oil collecting funnel 403; and, the mixed oil collecting container 404 is fixed on an electronic scale a406, the drive oil collecting container 405 is fixed on an electronic scale B407, a mixed oil receiving funnel 408 and a drive oil output pipe 409 are arranged at the top of the mixed oil collecting container 404, the mixed oil receiving funnel 408 is located right below the mixed oil collecting funnel 403, and the drive oil output pipe 409 is communicated with the drive oil collecting container 405. Solenoid valve switches 410a/410b and pressure transducers 411a/411b are independently provided on the input lines of each capsule collector 401a/401b, and bleed solenoid valves 412a/412b are independently provided on the output lines of each capsule collector 401a/401 b. A displacement output pressure sensor 413, an automatic pressure regulating valve 414 and a pressure reducing valve 415 are further connected in series on an output pipeline of the through hole A108 in sequence, an output end of the pressure reducing valve 415 is connected with a mixed oil collecting hopper 403 and solenoid valve switches 410a/410b of the closed collectors 401a/401b through pipelines, a solenoid valve 416 is arranged at an outlet of the mixed oil collecting hopper 403, and an oil outlet of the solenoid valve 416 is communicated with the mixed oil receiving hopper 408.
In addition, the multifunctional displacement experimental apparatus described in this embodiment further includes a loading cylinder 500, the main portion of the T-shaped piston 111 is located in the loading cylinder 500, and the loading cylinder 500 is detachably and fixedly connected with the lower force transmission end 103 (specifically, in this embodiment, the outer wall of the lower force transmission end 103 is provided with the external thread 1032, the inner wall of the mouth portion of the loading cylinder 500 is provided with the internal thread 501, and the double-thread flange 502 is respectively in threaded connection with the mouth portion of the loading cylinder 500 and the lower force transmission end 103 by using the double-thread flange 502 with the internal and external threads, so that the structure not only realizes the fixed connection between the loading cylinder 500 and the holder 100, but also is easy to disassemble, assemble and maintain), and by providing the loading cylinder 500, a pre-jacking force before an experiment can be provided for the holder.
The use method of the multifunctional displacement experimental device in the embodiment is as follows:
first, preparation before experiment
1. Loading the sample 700 into the holder 100, and stably placing the assembly body assembled by the holder 100 and the loading cylinder 500 onto a rotary table in the CT machine;
2. connecting a liquid inlet pressure sensor 204 with a confining pressure liquid injection hole 113, a confining pressure liquid outlet hole 110 with a liquid outlet pressure sensor 205, a displacement input pressure sensor 303 with a through hole B112, and a through hole A108 with a pressure reducing valve 415 by using pipelines;
3. setting a pre-jacking force to the gripper 100 by using the loading cylinder 500;
4. when the pressure value displayed by the liquid outlet pressure sensor 205 reaches the preset jacking force, the liquid injection pump 201 in the confining pressure loading system 200 is opened, the confining pressure circulating liquid is injected into the confining pressure cavity 109 through the confining pressure liquid injection hole 113, and when the circulating liquid continuously flows to the confining pressure liquid storage tank 202 in the pipeline after the automatic pressure regulating valve 203 is observed, the circulating liquid in the confining pressure cavity 109 is indicated to be full;
5. the confining pressure in the confining pressure cavity 109 is adjusted by the confining pressure loading system 200 until the pressure value displayed by the liquid outlet pressure sensor 205 reaches the preset confining pressure value;
6. the microstructure of an original sample was scanned in a CT machine as a reference.
Second, start the displacement experiment
1. Single liquid displacement experiment:
closing the on-off valve 305a at the inlet of the lower cavity 3042 and closing the gas valve 307 at the gas outlet of the high pressure gas cylinder 306; the displacement pump 302 is started, the liquid (for example, water) displacement agent in the reservoir 301 is pumped into the sample 700 in the holder 100 through the through hole B112, the displaced mixed oil flows into the mixed oil collecting funnel 403 through the through hole a108 via a pipeline (the electromagnetic valve 416 at the outlet of the mixed oil collecting funnel 403 is closed first), the mixed oil flows into the mixed oil receiving funnel 408 and further flows into the mixed oil collecting container 404, because the mixed oil collecting container 404 is pre-filled with the reference analytical oil which is the same as the produced oil, when the mixed oil enters the mixed oil collecting container 404, the oil above the liquid level exceeding the volume flows into the displacement collecting container 405 via the displacement output pipe 409, the mass difference before and after the mixed oil collecting container 404 is collected by the electronic scale a406 and the mass added by the displacement collecting container 405 acquired by the electronic scale B407, the recovery ratio of the displacement experiment can be calculated.
2. Liquid medicament displacement experiment:
opening a switch valve 305a at the inlet of the lower cavity 3042 and a switch valve 305b at the outlet of the upper cavity 3043, and closing a gas valve 307 at the outlet of a high pressure gas cylinder 306; the displacement experiment and the calculated recovery ratio of the displacement experiment can be performed as described above by opening the displacement pump 302 to pump the liquid in the reservoir 301 into the lower cavity 3042 of the intermediate container 304 and pushing the liquid chemical serving as the displacement agent out of the upper cavity 3043 of the intermediate container 304 through the sealing piston 3041 and into the sample 700 in the holder 100 through the pipe and the through hole B112.
3. Gas displacement experiment:
the pressurized gas (e.g., N) in the high pressure gas cylinder 306 is generated by closing the displacement pump 302, the on-off valve 305a at the inlet of the lower chamber 3042, and the on-off valve 305b at the outlet of the upper chamber 3043, and opening the gas valve 307 at the outlet of the high pressure gas cylinder 3062) Flows into the sample 700 in the holder 100 through the pipe and the through-hole B112, displaces the discharged mixture (including the displacement gas)Replacing water and oil in gas and a sample) from the through hole A108 to flow into one closed collector 401a through a pipeline (at the moment, the electromagnetic valve switch 410b corresponding to the other closed collector 401b is in a closed state), when the corresponding pressure transmitter 411a at the front end of the working closed collector 401a reaches a preset upper pressure limit, the corresponding electromagnetic valve switch 410a is closed, the electromagnetic valve switch 410b at the front end of the other closed collector 401b is opened, and then the collection is continued; at this time, the discharge solenoid valve 412a located below the hermetic container 401a is opened, the mixture located in the hermetic container 401a is discharged into the buffer tank 402, since the bottom of the buffer tank 402 is opened, the gas in the discharged mixture is exhausted, the oil residue in the mixture flows into the mixed oil collecting funnel 403 from the opening at the bottom of the buffer tank 402 (the solenoid valve 416 at the outlet of the mixed oil collecting funnel 403 is closed first), when the mixed oil collecting funnel 403 collects a predetermined amount, the solenoid valve 416 is automatically opened, so that the mixed oil flows into the mixed oil receiving funnel 408 and further into the mixed oil collecting container 404, since the mixed oil collecting container 404 is pre-filled with the same reference analytical oil as the collected oil, when the mixed oil enters the mixed oil collecting container 404, the oil above the oil level exceeding the volume flows into the displacement collecting container 405 through the displacement output pipe 409, acquiring the mass difference before and after the mixed oil collecting container 404 by using an electronic scale A406 and acquiring the mass increased by the displacement oil collecting container 405 by using an electronic scale B407, namely calculating the recovery ratio of the gas displacement experiment, and acquiring the gas flow consumed by the displacement experiment by using a gas flow meter 303, a displacement input pressure sensor 304 and a displacement output pressure sensor 413; and when the total flow of the gas displacement reaches the PV value required by the experiment, ending the gas displacement experiment.
The 3 displacement experiments can be executed independently, 2 or 3 displacement experiments can also be executed in a combined mode, the displacement experiments can be selected freely according to specific experiment requirements, the functionality and the universality are high, and the experiment cost is low.
In addition, during the entire displacement experiment described above, CT may be used to perform real-time scanning acquisition and monitoring of microscopic images of the specimen 700 in the holder 100 located therein.
Example 2
Referring to fig. 3, the multifunctional displacement experimental apparatus of the present embodiment is different from embodiment 1 only in that: the bottom of the loading cylinder 500 is further provided with a hydraulic oil delivery channel 503, an inner port 5031 of the hydraulic oil delivery channel is communicated with the inner cavity 504 of the loading cylinder, and an outer port 5032 of the hydraulic oil delivery channel is connected with an external axial pressure loading system 600 through a pipeline. The axle pressure loading system 600 comprises a hydraulic oil tank 601, a hydraulic oil pump 602 and a pressure sensor 603, wherein an oil inlet of the hydraulic oil pump 602 is connected with a pipeline of the hydraulic oil tank 601, an oil outlet of the hydraulic oil pump 602 is connected with an outer port 5032 of a hydraulic oil conveying channel through a pipeline, and the pressure sensor 603 is arranged on a pipeline connecting the hydraulic oil pump 602 and the outer port 5032 of the hydraulic oil conveying channel. The axial loading system 600 delivers high pressure hydraulic oil to the loading cylinder cavity 504 through the hydraulic oil delivery passage 503 to be applied to the T-shaped piston 111, thereby axially loading the test piece 700 in the holder 100.
In the embodiment, after the displacement experiment is finished, the sample 700 does not need to be taken out and the confining pressure loading system 200 does not need to be closed, the displacement system 300 and the displacement separation metering system 400 only need to be closed first, then the axial pressure loading system 600 is opened to axially load the T-shaped piston 111 in the loading cylinder 500, the sample 700 after displacement can be subjected to the triaxial experiment continuously, and CT scanning can be combined to perform the triaxial experiment, so that the change of the microstructure of the sample from the original state to the crushed whole stage is obtained, and a perfect experimental basis is provided for the exploitation research of petroleum and natural gas.
Example 3
Referring to fig. 4 and 5, the present embodiment provides a holder 100, where the difference between the holder 100 and the embodiment 1 is that an axial pressure-bearing carbon fiber sleeve 105 has differences, specifically: in this embodiment, at least one set (preferably 2 to 4 sets, 3 sets are shown in the figure, but not limited to this number) of cantilevers 114 with central symmetry are arranged on the outer periphery of the upper force transfer tip 102 and the outer periphery of the lower force transfer tip 103, the cantilever 114a on the upper force transfer tip 102 and the cantilever 114b on the lower force transfer tip 103 form mirror symmetry, and the axial pressure-bearing carbon fiber sleeve 105 is obtained by winding and curing carbon fibers on the upper and lower cantilevers 114a and 114b forming mirror symmetry in a winding direction parallel to the axial direction (i.e., forming a zero included angle with the axial direction) through resin. When winding carbon fiber, need to solidify carbon fiber with resin, the technique of carbon fiber winding with resin solidification has been widely used in fields such as aircraft shell, car shell, bicycle support, fishing rod, concrete reinforcement, yacht, racing boat, for known technique, do not do the repeated description here.
In order to facilitate manufacturing and ensure robustness in use, in this embodiment, the cantilever 114a and the upper force transfer tip 102 and the cantilever 114b and the lower force transfer tip 103 are integrally formed.
Finally, what needs to be described here is: because the gripper 100 of the present invention is provided with the circumferential pressure-bearing carbon fiber sleeve 104 and the axial pressure-bearing carbon fiber sleeve 105, the axial stress and the circumferential stress are completely separated and do not affect each other, so that the gripper 100 can simultaneously bear high confining pressure and high axial load; moreover, the cylinder 101 can be made of different materials according to specific use environments, such as: the titanium alloy can simultaneously meet the requirements of high temperature, high ray penetration, non-magnetism and the like; the rubber can meet the requirements of high ray penetration, no magnetism, low weight and the like; the polytetrafluoroethylene can simultaneously meet the requirements of corrosion resistance, high temperature, high ray penetration, no magnetism, low weight and the like, has the main functions of sealing the internal medium (gas or liquid) and supporting the circumferential pressure-bearing carbon fiber sleeve 104 wound on the periphery of the polytetrafluoroethylene; the barrel 101 is typically thin to facilitate the detection of the sample inside by an external detection instrument. In addition, by selecting the material of the loading cylinder 500, for example: the titanium alloy, the aluminum alloy, the magnesium alloy or the carbon fiber composite material with low density and high strength is selected, the weight of the whole device can be further reduced, and the device is more suitable for the requirements of higher conditions (large axial load and light weight) of CT scanning experiments.
It is finally necessary to point out here: the above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. A multifunctional displacement experimental device capable of combining CT scanning comprises: the device comprises a holder, a confining pressure loading system, a displacement system and an oil displacement separation metering system; the method is characterized in that: the clamp holder comprises a cylinder body, an upper force transmission end head, a lower force transmission end head, a circumferential pressure-bearing carbon fiber sleeve and an axial pressure-bearing carbon fiber sleeve, wherein a sealing pressing block hermetically connected with the upper end part of the cylinder body and a compression nut in threaded connection with the inner wall of the upper force transmission end head are arranged in an inner cavity of the upper force transmission end head; the displacement system comprises a liquid storage tank, a displacement pump, an intermediate container, a high-pressure gas storage bottle and a displacement input pressure sensor, wherein an inner cavity of the intermediate container is divided into a lower cavity and an upper cavity by a sealing piston, wherein: the liquid inlet of the displacement pump is connected with the liquid storage tank through a pipeline, the liquid outlet of the displacement pump is respectively connected with the lower cavity of the intermediate container and the through hole B through a pipeline, the displacement input pressure sensor is connected in series with the pipeline between the displacement pump and the through hole B, the upper cavity of the intermediate container and the gas outlet of the high-pressure gas storage bottle are connected in parallel with the pipeline between the displacement pump and the displacement input pressure sensor through pipelines, the gas valve and the gas flowmeter are sequentially arranged at the gas outlet of the high-pressure gas storage bottle, the pipeline between the upper cavity of the intermediate container and the displacement input pressure sensor is provided with a liquid medicament output pressure sensor, and the inlet of the lower cavity and the outlet of the upper cavity are respectively provided with a switch valve.
2. The multifunctional displacement experiment device of claim 1, wherein: the oil displacement separation metering system comprises a closed collector, a buffer tank with an opening at the bottom, a mixed oil collecting funnel, a mixed oil collecting container and an oil displacement collecting container, wherein the closed collector and the mixed oil collecting funnel are connected with a through hole A through pipelines, the bottom of the closed collector is communicated with an inner cavity of the buffer tank through a pipeline, and the opening at the bottom of the buffer tank is communicated with the mixed oil collecting funnel; and the mixed oil collecting container and the oil displacement collecting container are respectively fixed on an independent electronic scale, a mixed oil receiving funnel and an oil displacement output pipe are arranged at the top of the mixed oil collecting container, the mixed oil receiving funnel is positioned under the mixed oil collecting funnel, and the oil displacement output pipe is communicated with the oil displacement collecting container.
3. The multifunctional displacement experiment device of claim 2, wherein: the number of the closed collectors is 2, the bottom of each closed collector is communicated with the inner cavity of the buffer tank through an independent pipeline, an electromagnetic valve switch and a pressure transmitter are independently arranged on an input pipeline of each closed collector, and a discharge electromagnetic valve is independently arranged on an output pipeline of each closed collector.
4. The multifunctional displacement experiment device of claim 1, wherein: the axial pressure-bearing carbon fiber sleeve is obtained by wrapping, winding and curing carbon fibers on the upper and lower bearing shoulders in a winding direction which is inclined to the axial direction through resin.
5. The multifunctional displacement experiment device of claim 1, wherein: the cantilever positioned on the upper force transmission end and the cantilever positioned on the lower force transmission end form mirror symmetry, and the axial pressure-bearing carbon fiber sleeve is obtained by winding and curing carbon fibers on the upper and lower cantilevers forming mirror symmetry in a winding direction parallel to the axial direction through resin.
6. The multifunctional displacement experiment device of claim 1, wherein: and the lateral part of the upper force transmission end is provided with a confining pressure liquid outlet hole communicated with the confining pressure cavity, the lateral part of the lower force transmission end is provided with a confining pressure liquid injection hole communicated with the confining pressure cavity, and the confining pressure liquid outlet hole and the confining pressure liquid injection hole are respectively connected with a confining pressure loading system in a closed loop mode through pipelines.
7. The multifunctional displacement experiment device of claim 6, wherein: confining pressure loading system includes infusion pump, confining pressure liquid storage tank, automatic air-vent valve, feed liquor pressure sensor and goes out liquid pressure sensor, the oil inlet of infusion pump is connected with confining pressure liquid storage tank through the pipeline, the oil-out of infusion pump is connected with confining pressure liquid injection hole through the pipeline, the confining pressure liquid discharge hole is connected with confining pressure liquid storage tank through the pipeline, automatic air-vent valve concatenates on the pipeline between confining pressure liquid discharge hole and confining pressure liquid storage tank, feed liquor pressure sensor concatenates on the pipeline between infusion pump and confining pressure liquid injection hole, it concatenates on the pipeline between confining pressure liquid discharge hole and automatic air-vent valve to go out liquid pressure sensor.
8. The multifunctional displacement experiment device of claim 1, wherein: the loading device is characterized by further comprising a loading cylinder, the main portion of the T-shaped piston is located in the loading cylinder, and the loading cylinder is detachably and fixedly connected with the lower force transmission end.
9. The multifunctional displacement experiment device of claim 8, wherein: the bottom of the loading cylinder is provided with a hydraulic oil conveying channel, an inner port of the hydraulic oil conveying channel is communicated with an inner cavity of the loading cylinder, and an outer port of the hydraulic oil conveying channel is connected with an external axial pressure loading system through a pipeline.
10. The multifunctional displacement experiment device of claim 9, wherein: the axle load system comprises a hydraulic oil tank, a hydraulic oil pump and a pressure sensor, wherein an oil inlet of the hydraulic oil pump is connected with a pipeline of the hydraulic oil tank, an oil outlet of the hydraulic oil pump is connected with an outer port pipeline of a hydraulic oil conveying channel, and the pressure sensor is arranged on a pipeline connected with an outer port of the hydraulic oil pump and the outer port of the hydraulic oil conveying channel.
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| CN112255253A (en) * | 2020-10-30 | 2021-01-22 | 西南石油大学 | High-temperature high-pressure large-scale oil-water displacement dynamic X-ray scanning experimental device |
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