CN113654941B - Multifunctional teaching experiment system and method for measuring pressure in petroleum field - Google Patents
Multifunctional teaching experiment system and method for measuring pressure in petroleum field Download PDFInfo
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- CN113654941B CN113654941B CN202111019582.4A CN202111019582A CN113654941B CN 113654941 B CN113654941 B CN 113654941B CN 202111019582 A CN202111019582 A CN 202111019582A CN 113654941 B CN113654941 B CN 113654941B
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
- G01N11/16—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by measuring damping effect upon oscillatory body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
- G01N25/04—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering of melting point; of freezing point; of softening point
- G01N25/06—Analysis by measuring change of freezing point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
-
- 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
- G09B19/00—Teaching not covered by other main groups of this subclass
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- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
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- Business, Economics & Management (AREA)
- Engineering & Computer Science (AREA)
- Entrepreneurship & Innovation (AREA)
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses a multifunctional teaching experiment system and an experiment method for under-pressure measurement in the petroleum field, wherein the multifunctional teaching experiment system comprises a nitrogen bottle, a medicament tank, a metering tank, a wax-dissolving and viscosity-reducing reaction kettle, a wax-preventing and viscosity-reducing reaction kettle and a waste liquid tank, wherein the wax-dissolving and viscosity-reducing reaction kettle and the wax-preventing and viscosity-reducing reaction kettle are both positioned in a temperature control test box; the nitrogen cylinder is used for pressurizing the metering tank, the wax-dissolving and pour-point-reducing reaction kettle and the wax-preventing and viscosity-reducing reaction kettle; the medicament tank is used for providing medicament for the metering tank; the metering tank is used for providing a medicament for the wax-dissolving and pour-point-reducing reaction kettle and the wax-preventing and viscosity-reducing reaction kettle; the waste liquid tank is used for recycling waste liquid of the wax-dissolving and pour-point-reducing reaction kettle and the wax-preventing and viscosity-reducing reaction kettle; the wax dissolving and pour point depressing reaction kettle is used for measuring the wax dissolving rate and pour point depressing rate of the medicament; the wax-preventing and viscosity-reducing reaction kettle is used for measuring the wax-preventing rate and viscosity-reducing rate of the medicament. The invention is used for realizing the integrated test of paraffin dissolution, pour point depression, viscosity reduction and paraffin control of the unconventional paraffin removal and control agent and viscosity reduction pour point depressant, and is beneficial to the high-efficiency development of experimental teaching.
Description
Technical Field
The invention relates to the field of petroleum and natural gas, in particular to a multifunctional teaching experiment system and method for measuring pressure in the petroleum field.
Background
Wax deposition in a shaft is a common problem in the production process of an oil well, and in the flowing process of waxy crude oil in the shaft, the phenomenon of wax deposition possibly occurs along with the reduction of temperature and pressure, wax deposited on the inner wall of an oil pipe causes the narrowing of a shaft flow passage, the reduction of the oil well yield, and even the blockage of the oil pipe and the production stoppage of the oil well are caused when the oil well is serious. The thick oil is used as unconventional oil gas resource, has high viscosity, large flow resistance in a shaft and large lifting difficulty, and is a key for exploiting thick oil.
At present, a plurality of processes for paraffin removal and viscosity reduction and pour point reduction of a shaft exist, wherein the processes for paraffin removal and pour point reduction of a chemical agent are widely adopted with the characteristics of wide adaptability, high efficiency, simplicity in operation and the like, but the field use effects of the paraffin removal and pour point reduction agent and the viscosity reduction agent are often greatly different from the indoor experimental evaluation results, wherein one important reason is that the research and development and effect evaluation of the paraffin removal and pour point reduction agent are usually carried out under normal pressure according to relevant industry standards or enterprise standards such as "clean and paraffin removal agent technical conditions for oil extraction" SY/T6300-2009 "," general technical conditions for heavy oil viscosity reduction agent "Q/SH 1020 1519-2013", "crude oil condensation point determination method" SY/T0541-2009, and the like. Moreover, with the development and development of the unconventional paraffin inhibitor and viscosity reducing pour point depressant in a gaseous state at normal pressure, the experimental devices and test methods in the above standards have not been able to achieve the evaluation of the efficacy of such agents. Meanwhile, the oil well paraffin removal and prevention process technology and the thick oil exploitation process technology are important chapters in universities such as oil extraction engineering, ocean oil extraction gas engineering and the like, are course contents which must be mastered by the petroleum engineering and ocean oil gas engineering profession, however, in the prior art, multifunctional teaching experiment equipment capable of integrating the paraffin dissolution rate, the paraffin prevention rate, the viscosity reduction rate and the pour point reduction rate into a whole is not available, and the processes of paraffin dissolution, paraffin prevention, viscosity reduction, pour point reduction and the like are difficult to intuitively and rapidly show for students.
Disclosure of Invention
The invention provides a multifunctional teaching experiment system and an experiment method for under-pressure measurement in the petroleum field, which are used for solving the problems that in the prior art, an evaluation experiment of an unconventional paraffin removal inhibitor and a viscosity reduction pour point depressant which are in a gaseous state at normal pressure cannot be carried out, and processes such as paraffin dissolution, paraffin prevention, viscosity reduction, pour point reduction and the like cannot be intuitively and rapidly displayed for students, and realizing the integrated test of paraffin dissolution, pour point reduction, viscosity reduction and paraffin prevention of the unconventional paraffin removal inhibitor and the viscosity reduction pour point depressant, and the aim of being beneficial to efficient development of experimental teaching is fulfilled.
The invention is realized by the following technical scheme:
the multifunctional teaching experiment system for the pressurized measurement in the petroleum field comprises a nitrogen bottle, a medicament tank, a metering tank, a wax-dissolving and viscosity-reducing reaction kettle, a wax-preventing and viscosity-reducing reaction kettle and a waste liquid tank, wherein the wax-dissolving and viscosity-reducing reaction kettle and the wax-preventing and viscosity-reducing reaction kettle are both positioned in a temperature-controlling test box;
the nitrogen cylinder is used for pressurizing the metering tank, the paraffin dissolving and pour point depressing reaction kettle and the paraffin preventing and viscosity reducing reaction kettle;
the medicament canister is used for providing medicament for the metering canister;
the metering tank is used for providing a medicament for the wax-dissolving and pour-point-reducing reaction kettle and the wax-preventing and viscosity-reducing reaction kettle;
the waste liquid tank is used for recycling waste liquid of the wax-dissolving and pour-point-reducing reaction kettle and the wax-preventing and viscosity-reducing reaction kettle;
The paraffin dissolving and pour point depressing reaction kettle is used for measuring the paraffin dissolving rate and pour point depressing rate of the medicament;
the wax-control viscosity-reduction reaction kettle is used for measuring the wax-control rate and viscosity-reduction rate of the medicament.
Aiming at the problems that in the prior art, an evaluation experiment of an unconventional paraffin removal agent and a viscosity reduction pour point depressant which are in a gaseous state at normal pressure cannot be carried out and processes of paraffin dissolution, paraffin prevention, viscosity reduction, pour point reduction and the like cannot be intuitively and rapidly displayed for students, the invention firstly provides a multifunctional teaching experiment system for measuring the pressure in the petroleum field, wherein a nitrogen cylinder is utilized to pressurize downstream equipment such as a metering tank, a paraffin dissolution and pour point reduction reaction kettle, a paraffin prevention and viscosity reduction reaction kettle and the like so as to meet the stable experiment of the unconventional paraffin removal agent and the viscosity reduction pour point depressant which are in the gaseous state at normal pressure; the medicament tank stores the gaseous medicament under pressure, the gaseous medicament is liquefied under nitrogen pressurization after entering the metering tank, and the metering tank is used for metering the liquid volume of the medicament. In the experimental process, a temperature control test box is used for carrying out environmental temperature control on a paraffin dissolving and pour point depressing reaction kettle, a paraffin preventing and viscosity reducing reaction kettle and crude oil serving as a sample; the waste liquid after the experiment is discharged to a waste liquid tank for recycling, so that leakage of the gaseous unconventional wax removing agent and the viscosity reducing pour point depressant under normal pressure is avoided, potential safety hazards are avoided, and meanwhile the unconventional agents can be recycled. The paraffin dissolving and pour point depressing reaction kettle is used for a paraffin dissolving and pour point depressing test to determine the paraffin dissolving rate and pour point depressing rate of the medicament; the wax-preventing and viscosity-reducing reaction kettle is used for viscosity test and wax-depositing experiment to determine the wax-preventing rate and viscosity-reducing rate of the agent.
Compared with the prior art, the application has the following advantages: firstly, the two kettles are used in four ways, and a set of complete operation can be used for completing wax dissolution experiments, condensation point tests, viscosity tests and wax precipitation experiments, so that experimental steps are reduced, the functions are strong, the experimental time and space are obviously saved, the experimental efficiency is obviously improved, and the oil product detection can be rapidly completed on an engineering site; secondly, the defect that the evaluation experiment of the non-conventional paraffin removal and prevention agent and the viscosity reduction pour point depressant which are in a gaseous state at normal pressure cannot be carried out in the prior art is overcome, the method can be used for carrying out the measurement of the paraffin dissolution rate, the paraffin prevention rate, the viscosity reduction rate and the pour point depression rate of the liquid agent and the low saturated vapor pressure gaseous agent, and the integrated test of the paraffin dissolution, the pour point depression, the viscosity reduction and the paraffin prevention of the non-conventional paraffin removal and prevention agent and the viscosity reduction pour point depressant is realized; in addition, the experiment efficiency is extremely high, so that the defect that the measurement experiments of the wax dissolution rate, the wax control rate, the viscosity reduction rate and the pour point depression rate in the teaching process in the prior art are required to be carried out separately is overcome, the processes and effects of wax dissolution, wax control, viscosity reduction, pour point depression and the like can be intuitively and rapidly displayed for students in limited classroom time, more students can be manually operated to carry out the experiments in the limited classroom time, the students can intuitively and deeply understand the related contents of the chemical agent wax control and viscosity reduction pour point depression technology, the evaluation method of the wax control agent and the viscosity reduction pour point depression effect is mastered, and the experimental operation capacity and the logic capacity of the students are improved.
Further, the output end of the nitrogen cylinder is sequentially provided with a pressure reducing valve and a safety valve;
a metering tank pressurizing valve is arranged between the safety valve and the metering tank;
a pressurizing valve of the wax-dissolving pour point depressing reaction kettle is arranged between the safety valve and the wax-dissolving pour point depressing reaction kettle;
and a pressurizing valve of the wax-preventing and viscosity-reducing reaction kettle is arranged between the safety valve and the wax-preventing and viscosity-reducing reaction kettle.
According to the scheme, even if the pressure reducing valve and the safety valve are arranged on the outlet pipeline of the nitrogen cylinder in sequence, the pressure of the nitrogen gas outlet is regulated through the pressure reducing valve, and the use safety of the nitrogen gas cylinder is improved through the safety valve; the nitrogen flows through the safety valve to provide nitrogen for the downstream flow, and is particularly communicated with the metering tank through the metering tank pressurizing valve, communicated with the interior of the paraffin dissolving and viscosity reducing reaction kettle through the paraffin dissolving and viscosity reducing reaction kettle pressurizing valve and communicated with the paraffin preventing and viscosity reducing reaction kettle through the paraffin preventing and viscosity reducing reaction kettle pressurizing valve; the metering tank pressurizing valve is used for controlling the internal pressure of the metering tank, the paraffin dissolving and pour point depressing reaction kettle pressurizing valve is used for controlling the internal pressure of the paraffin dissolving and pour point depressing reaction kettle, and the paraffin preventing and viscosity reducing reaction kettle pressurizing valve is used for controlling the internal pressure of the paraffin preventing and viscosity reducing reaction kettle, so that the gaseous unconventional medicament at normal pressure is fully ensured to be always kept in a liquid state in the experimental process of the system to meet the experimental requirements.
Further, a medicament valve is arranged between the medicament tank and the metering tank;
a paraffin dissolving and pour point depressing reaction kettle dosing valve is arranged between the metering tank and the paraffin dissolving and pour point depressing reaction kettle, and a paraffin preventing and viscosity depressing reaction kettle dosing valve is arranged between the metering tank and the paraffin preventing and viscosity depressing reaction kettle;
a paraffin-dissolving and pour-point-reducing reaction kettle blow-down valve is arranged between the paraffin-dissolving and pour-point-reducing reaction kettle and the waste liquid tank, and a paraffin-preventing and pour-reducing reaction kettle blow-down valve is arranged between the paraffin-preventing and pour-reducing reaction kettle and the waste liquid tank;
the device also comprises a paraffin dissolving and pour point depressing reaction kettle pressure release valve, a paraffin preventing and viscosity reducing reaction kettle pressure release valve and a waste liquid tank pressure release valve which are respectively used for releasing pressure for the paraffin dissolving and pour point depressing reaction kettle, the paraffin preventing and viscosity reducing reaction kettle and the waste liquid tank.
In the scheme, the agent adding valve of the wax-dissolving and pour-point-reducing reaction kettle and the agent adding valve of the wax-preventing and viscosity-reducing reaction kettle are respectively used for adding medicaments into the wax-dissolving and pour-point-reducing reaction kettle and the wax-preventing and viscosity-reducing reaction kettle from a metering tank; the paraffin-dissolving and pour-point-reducing reaction kettle blow-down valve and the paraffin-preventing and viscosity-reducing reaction kettle blow-down valve are respectively used for discharging the medicament from the corresponding reaction kettle to the waste liquid tank for recycling. Because the experiment medicament of this application need face unconventional medicament, consequently the waste liquid jar is closed container equally, is difficult to accomplish the pressure release in the blowdown process, consequently this application still need for dissolving wax pour point depressing reaction cauldron, wax control viscosity reduction reation kettle, waste liquid jar dispose corresponding relief valve alone in order to realize respective pressure release.
Further, transparent parts for observation are arranged on the surfaces of the metering tank, the paraffin dissolving and pour point depressing reaction kettle and the paraffin preventing and viscosity reducing reaction kettle; the wax-dissolving and pour-point-reducing reaction kettles are provided with stirring devices;
the downstream end of the metering tank pressurizing valve is provided with a metering tank pressure gauge for monitoring the pressure in the metering tank;
the downstream end of the pressurizing valve of the wax-dissolving and pour-point-reducing reaction kettle is provided with a pressure gauge of the wax-dissolving and pour-point-reducing reaction kettle for monitoring the pressure in the wax-dissolving and pour-point-reducing reaction kettle;
the downstream end of the pressurizing valve of the wax-control viscosity-reduction reaction kettle is provided with a wax-control viscosity-reduction reaction kettle pressure gauge for monitoring the pressure in the wax-control viscosity-reduction reaction kettle;
the device also comprises a waste liquid tank pressure gauge for monitoring the pressure in the waste liquid tank.
The transparent part can be a local area or a whole area corresponding to the surface of the tank body or the kettle body, so that the condition that the inside of the container can be directly observed, the liquid volume in each container and/or the experimental phenomenon in the kettle can be observed under pressure, teaching experiments are facilitated, and processes such as wax melting, wax deposition and the like are displayed more intuitively and vividly for students; the material of this application to transparent portion does not do the restriction, but need satisfy can not pollute experiment medicament and crude oil, and the pressure-bearing capacity satisfies the required pressure of experiment.
The wax-dissolving pour point-reducing reaction kettle and the wax-preventing and viscosity-reducing reaction kettle are respectively provided with an independent stirring device and are used for quickly and uniformly mixing the experimental reagent with crude oil and the like.
Each manometer is used for monitoring the pressure in the corresponding container so as to facilitate the accurate control and adjustment of the experimental pressure in the experimental process and ensure the accurate measurement of the unconventional medicament.
Further, the wax-dissolving and pour point-reducing reaction kettle comprises a first cylinder wall, a first upper end cover, a first lower end cover and a first top cover, wherein the first upper end cover and the first lower end cover are respectively connected to two ends of the first cylinder wall in a sealing mode, the first top cover is matched with the first upper end cover in a sealing mode, and the first top cover is detachably connected with the first upper end cover through a first buckle;
the first upper end cover is provided with a first channel for adding agent, pressurizing and decompressing, and the first lower end cover is provided with a first liquid outlet for discharging liquid;
the inner wall of the first upper end cover is also fixedly connected with a ball rail for placing wax balls, and the ball rail gradually inclines upwards from one end close to the inner wall of the first upper end cover to one end far away from the inner wall of the first upper end cover;
the first liquid draining port and the ball rail are respectively positioned at two sides of the filtering baffle;
The device also comprises an angle adjusting mechanism for tilting the wax dissolving and pour point depressing reaction kettle.
The first cylinder wall of the wax-dissolving pour point depressing reaction kettle is fixed and sealed through the upper end cover and the lower end cover, the first upper end cover is sealed through the first top cover, and the existing sealing mode is applicable. One side of the first upper end cover is provided with a channel which is used for adding, pressurizing and emptying the wax-dissolving pour point depressing reaction kettle, and is called a first channel, and the first channel can be correspondingly communicated with a metering tank, a nitrogen cylinder, an emptying pipe valve and the like as required; the first lower end cover is provided with a first liquid outlet for liquid discharge, and the first liquid outlet is communicated with the waste liquid tank.
Still set up the ball rail on the first upper end cover, when the wax dissolving pour point depressing reaction cauldron body is vertical state, the ball rail is from the one end that is close to first upper end cover inner wall to the one end that keeps away from first upper end cover inner wall gradually upward sloping to ensure that the wax ball of placing on the ball rail can not drop automatically.
The filtering baffle is used for separating liquid medicament and residual wax ball after the wax dissolving experiment is finished, the first liquid outlet and the ball rail are required to be respectively positioned at two sides of the filtering baffle, the wax ball enters one side of the filtering baffle to carry out the dissolving experiment, after the experiment is finished, liquid is discharged from the first liquid outlet at the other side of the filtering baffle, the recovery weighing of the residual wax ball is ensured, and the problem that the experiment cannot be finished due to the fact that the residual wax ball is discharged is avoided. Of course, the mesh number of the filtering baffle plate is adaptively selected according to actual conditions, so that the liquid medicament can freely pass through the filtering baffle plate, and the wax ball and the residual wax ball after the experiment is finished can not pass through the filtering baffle plate.
The angle adjusting mechanism is used for the integral tilting wax dissolving and pour point depressing reaction kettle, and the functions mainly comprise: the wax ball placed on the ball rail falls down to the space on the same side of the filtering baffle to carry out wax dissolving experiment, incline for a designated angle to carry out the condensation point measurement of crude oil, complete the pour point depression rate measurement of the medicament on the crude oil and the like.
Further, the first upper end cover and the first lower end cover are fixedly connected through a first bolt;
a first thermometer insertion pipe inserted into the first cylinder wall is arranged on the first top cover;
the top of the filtering baffle is higher than the ball rail, and the top of the filtering baffle is provided with a limiting mechanism for preventing the dissolved wax ball residues from moving to the other side of the filtering baffle.
The thermometer inserting tube on the first top cover is used for inserting a thermometer to monitor the internal temperature of the paraffin dissolving and pour point depressing reaction kettle, the thermometer inserting tube is matched with the thermometer to be inserted as much as possible in size, and the gap is small enough to improve the measuring precision; the thermometer is inserted into the tube to ensure the stable operation of the unconventional medicament under the pressure condition.
The top of the filtering baffle is higher than the ball rail in order to prevent the wax ball placed on the ball rail from falling to the other side of the filtering baffle (i.e. the side where the first liquid outlet is located) when the whole paraffin dissolving and pour point depressing reaction kettle is inclined. The limiting mechanism can thoroughly avoid the problem that the residual wax ball flows along with the fluid in the liquid discharge process or moves to the other side of the filtering baffle under the action of gravity due to the inclination of the reaction kettle; the specific structure of the limiting mechanism is not limited herein, and only the effective blocking of the residual wax ball is required.
Further, the angle adjusting mechanism comprises a dial and a rotating rod, wherein the lower end of the rotating rod is hinged with the dial, and the upper end of the rotating rod is connected with a handle; the rotating rod is fixedly connected with the wax dissolving and pour point depressing reaction kettle, and the axis of the rotating rod is parallel and coplanar with the axis of the wax dissolving and pour point depressing reaction kettle; the rotary rod is provided with a second pin hole matched with the first pin hole.
The calibrated scale is fixed in laboratory optional position as relative stationary object in this scheme, and the rotary rod is fixed with dissolving wax pour point depressing reaction cauldron, and the rotary rod lower extreme articulates on the calibrated scale simultaneously to realize rotating the in-process and drive dissolving wax pour point depressing reaction cauldron synchronous rotation, in order to make its slope to appointed angle. Because the axis of the rotary rod is parallel to and coplanar with the axis of the paraffin dissolving and pour point depressing reaction kettle, the inclination angle of the paraffin dissolving and pour point depressing reaction kettle can be accurately controlled by the corresponding pointing angle of the rotary rod on the dial. When the paraffin dissolving and pour point depressing reaction kettle is specifically used, the handle drives the paraffin dissolving and pour point depressing reaction kettle to rotate to a specified inclination angle, and then the dowel penetrates through the second pin hole and the first pin hole to be temporarily fixed.
Further, the wax-preventing viscosity-reducing reaction kettle comprises a second cylinder wall, a second upper end cover and a second lower end cover which are respectively connected with two ends of the second cylinder wall in a sealing way, and a second top cover which is matched with the second upper end cover in a sealing way, wherein the second top cover is detachably connected with the second upper end cover through a second buckle;
the second upper end cover is provided with a second channel for adding agent, pressurizing and decompressing, and the second lower end cover is provided with a second liquid outlet for discharging liquid;
the second top cover is connected with a vibration viscometer, a second thermometer inserting pipe and a wax precipitation pipe, and the wax precipitation pipe is communicated with the circulating water bath.
Wherein a vibration viscometer is used for viscosity measurement to achieve calculation of viscosity reduction rate. The circulating water bath is used for providing a temperature difference environment to realize quick wax precipitation.
Further, the device also comprises a sealing cover, wherein the bottom of the second top cover is provided with an installation head extending along the axial direction, and the sealing cover is in threaded connection with the installation head; the bottom of the sealing cover is provided with a through hole for the wax precipitation pipe to pass through, a step surface is formed between the outer wall of the through hole and the inner wall of the sealing cover, the top of the wax precipitation pipe is provided with a seat hanging part extending along the radial direction, and the wax precipitation pipe is hung on the step surface through the seat hanging part; sealing gaskets are arranged between the seat hanging part and the step surface and between the seat hanging part and the mounting head; the water heater also comprises a cold water injection pipe and a cold water outlet pipe which penetrate through the second top cover, wherein the cold water injection pipe stretches into the bottom end of the wax precipitation pipe, the cold water outlet pipe stretches into the mounting head, and cold water enters the cold water injection pipe from the circulating water bath and flows back to the circulating water bath from the cold water outlet pipe.
In the scheme, the connection with the sealing cover is realized through the mounting head, and the mounting and positioning of the wax precipitation pipe are realized through the step surface at the bottom of the sealing cover; when the wax deposition tube is specifically installed, the second top cover is screwed, the second top cover is communicated with the installation head to continuously descend under the action of threads, and sealing gaskets between the seat hanging part and the step surface and between the seat hanging part and the installation head are extruded to ensure a stable sealing effect, and meanwhile, the wax deposition tube is firmly abutted against the step surface to be kept stable.
Different from the internal paraffin deposition of the conventional paraffin deposition experiment, the paraffin deposition is carried out on the outer wall of the paraffin deposition pipe; and, the wax deposition pipe adopts the extrusion sealing mode in this application, compares with directly using screw thread seal, has reduced the wearing and tearing when the dismouting of wax deposition pipe, and then has reduced the measuring error of wax deposition volume. The viscosity test can be accomplished in the time of carrying out the wax precipitation experiment, and then the viscosity reduction rate can be measured while the wax control rate is measured.
Based on the experimental method of the multifunctional teaching experimental system for the belt pressure measurement in the petroleum field, the experimental method comprises the following steps:
s1, decompressing a metering tank, a paraffin-dissolving and pour-point-reducing reaction kettle, a paraffin-preventing and viscosity-reducing reaction kettle and a waste liquid tank, and stopping all valves in the teaching experiment system after decompression is completed;
S2, enabling a sufficient amount of medicament to enter a metering tank from a medicament tank;
s3, performing wax dissolution experiments through a wax dissolution and pour point depressing reaction kettle, wherein in the experimental process, a medicament is provided through a metering tank, pressurization is performed through a nitrogen bottle, the temperature is regulated through a temperature control test box, and waste liquid is recovered through a waste liquid tank;
s4, performing a condensation point test experiment through a wax dissolving and pour point depressing reaction kettle, providing a medicament through a metering tank, pressurizing through a nitrogen cylinder, adjusting the temperature through a temperature control test box, and recycling waste liquid through a waste liquid tank in the experimental process;
s5, performing a viscosity test experiment and a paraffin precipitation experiment through the paraffin control viscosity reduction reaction kettle, providing a medicament through a metering tank, pressurizing through a nitrogen cylinder, adjusting the oil temperature through a temperature control test box, and recycling waste liquid through a waste liquid tank in the experimental process.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the multifunctional teaching experiment system and the experiment method for the under-pressure measurement in the petroleum field are used in two kettles, the measurement of the dissolved wax, the measurement of the condensation point, the measurement of the viscosity and the measurement of the wax precipitation can be completed through one set of complete operation, the experimental steps are reduced, the functionality is strong, the experimental time and the experimental space are obviously saved, the experimental efficiency is obviously improved, and the oil product detection and the medicament test can be rapidly completed on the engineering site.
2. The multifunctional teaching experiment system and the experimental method for the pressurized measurement in the petroleum field overcome the defect that the evaluation experiment of the non-conventional paraffin removal inhibitor and the viscosity reduction inhibitor which are in a gaseous state at normal pressure cannot be carried out in the prior art, can be used for carrying out the measurement of the paraffin dissolution rate, the paraffin prevention rate, the viscosity reduction rate and the viscosity reduction rate of the liquid agent and the low saturated vapor pressure gaseous agent, and realize the integrated test of the paraffin dissolution, the viscosity reduction and the paraffin prevention of the non-conventional paraffin removal inhibitor and the viscosity reduction inhibitor.
3. The multifunctional teaching experiment system and the experiment method for the under-pressure measurement in the petroleum field solve the defect that the measurement experiments of the wax dissolution rate, the wax control rate, the viscosity reduction rate and the pour point reduction rate in the teaching process in the prior art are required to be carried out separately, can fully utilize the processes and effects of the wax dissolution, the wax control, the viscosity reduction, the pour point reduction and the like for students to be displayed intuitively and rapidly in a limited classroom time, and can also enable more students to operate and carry out the experiments manually in the limited classroom time, so that the students can more intuitively and deeply understand the related contents of the technology of the wax removal and the pour point reduction of the chemical agents, grasp the evaluation method of the effects of the wax removal and the viscosity reduction and pour point reduction agent, and improve the experimental operation capability and the logic capability of the students.
4. The multifunctional teaching experiment system and the experiment method for the under-pressure measurement in the petroleum field are provided with the filtering baffle plate in the paraffin dissolving and pour point depressing reaction kettle, the paraffin ball enters one side of the filtering baffle plate to carry out the dissolving experiment, after the experiment is completed, the liquid is discharged from the first liquid outlet on the other side of the filtering baffle plate, the quick separation of the residual paraffin ball and the medicament after the completion of the paraffin dissolving experiment can be realized, the recovery and weighing of the residual paraffin ball are ensured, and the problem that the experiment cannot be completed due to the fact that the residual paraffin ball is discharged is avoided.
5. The multifunctional teaching experiment system and the experimental method for the pressurized measurement in the petroleum field can accurately control the inclination angle of the wax-dissolving pour point depressing reaction kettle by rotating the angle correspondingly pointed by the rotary rod on the dial, and compared with the manual inclination mode in the prior art, the experimental precision is remarkably improved; besides the use of the mechanism in the measurement of the condensation point and the pour point depressing rate, the mechanism can also play a role in driving the wax ball to fall in the wax dissolving experiment process.
6. The multifunctional teaching experiment system and the experiment method for the under-pressure measurement in the petroleum field are used for carrying out paraffin precipitation on the outer wall of the paraffin precipitation pipe, and compared with the method of directly using thread sealing, the method has the advantages that the abrasion during the disassembly and assembly of the paraffin precipitation pipe is reduced, and further, the measurement error of the paraffin precipitation amount is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention. In the drawings:
FIG. 1 is a schematic diagram of a system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a wax-dissolving pour point depressing reaction kettle in an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a wax-dissolving pour point depressing reaction kettle in an embodiment of the invention;
FIG. 4 is a schematic structural view of a wax control and viscosity reduction reaction kettle in an embodiment of the invention;
FIG. 5 is a schematic view showing the connection of wax deposition tubes according to an embodiment of the present invention;
fig. 6 is a schematic diagram of the structure of the metering tank according to an embodiment of the present invention.
In the drawings, the reference numerals and corresponding part names:
1-nitrogen bottle, 2-medicament tank, 3-metering tank, 301-third cylinder wall, 302-third upper end cover, 303-third lower end cover, 304-third bolt, 305-pressurizing and emptying port, 306-additive discharging port, 4-wax-dissolving and pour-point depressing reaction kettle, 401-first cylinder wall, 402-first upper end cover, 403-first lower end cover, 404-first buckle, 405-first top cover, 406-first channel, 407-first liquid outlet, 408-ball rail, 409-filtering baffle, 410-first bolt, 411-first thermometer insertion tube, 412-dial, 413-rotary rod, 414-handle, 415-first pin hole, 416-second pin hole, 417-wax ball, 5-polytetrafluoroethylene sealing ring, 6-wax-proof viscosity-reducing reaction kettle, 601-second cylinder wall, 602-second upper end cover, 603-second lower end cover, 604-second top cover, 605-second buckle, 606-second channel, 607-second liquid outlet, 608-vibration viscometer, 609-second thermometer insertion tube, 610-waxing tube, 611-sealing cover, 612-through hole, 613-seat hanging part, 614-sealing gasket, 615-cold water injection tube, 616-cold water outlet tube, 617-mounting head, 618-second bolt, 7-magnetic stirrer, 8-data acquisition computer, 9-temperature control test box, 10-circulating water bath pot, 11-waste liquid pot, 12-pressure reducing valve, 13-safety valve, 14-medicament valve, 15-metering tank pressurizing valve, 16-wax-dissolving and pour point-reducing reaction kettle pressurizing valve, 17-wax-dissolving and pour point-reducing reaction kettle adding valve, 18-solvent discharging valve, 19-wax-dissolving and pour point-reducing reaction kettle pressure relief valve, 20-wax-dissolving and pour point-reducing reaction kettle blow-down valve, 21-wax-preventing and pour point-reducing reaction kettle pressurizing valve, 22-wax-preventing and pour point-reducing reaction kettle pressure relief valve, 23-wax-preventing and pour point-reducing reaction kettle adding valve, 24-wax-preventing and pour point-reducing reaction kettle blow-down valve, 25-waste liquid tank pressure relief valve, 26-waste liquid tank inlet valve, 27-metering tank pressure gauge, 28-wax-dissolving and pour point-reducing reaction kettle pressure gauge, 29-wax-preventing and pour point-reducing reaction kettle pressure gauge, 30-waste liquid tank pressure gauge and 31-stirrer.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention. In the description of the present application, it should be understood that the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present application.
Example 1:
the multifunctional teaching experiment system for the under-pressure measurement in the petroleum field shown in fig. 1 comprises a nitrogen bottle 1, a medicament tank 2, a metering tank 3, a wax-dissolving and viscosity-reducing reaction kettle 4, a wax-preventing and viscosity-reducing reaction kettle 6 and a waste liquid tank 11, wherein the wax-dissolving and viscosity-reducing reaction kettle 4 and the wax-preventing and viscosity-reducing reaction kettle 6 are both positioned in a temperature-controlling test box 9;
The nitrogen bottle 1 is used for pressurizing the metering tank 3, the wax-dissolving and pour-point-reducing reaction kettle 4 and the wax-preventing and viscosity-reducing reaction kettle 6; the medicament tank 2 is used for providing medicament for the metering tank 3; the metering tank 3 is used for providing a medicament for the wax-dissolving and pour-point-reducing reaction kettle 4 and the wax-preventing and viscosity-reducing reaction kettle 6; the waste liquid tank 11 is used for recycling waste liquid of the wax-dissolving and pour-point-reducing reaction kettle 4 and the wax-preventing and viscosity-reducing reaction kettle 6; the wax dissolving and pour point depressing reaction kettle 4 is used for measuring the wax dissolving rate and pour point depressing rate of the medicament; the wax-preventing and viscosity-reducing reaction kettle 6 is used for measuring the wax-preventing rate and viscosity-reducing rate of the medicament.
The output end of the nitrogen bottle 1 is sequentially provided with a pressure reducing valve 12 and a safety valve 13; a metering tank pressurizing valve 15 is arranged between the safety valve 13 and the metering tank 3; a pressurizing valve 16 of the wax-dissolving pour point depressing reaction kettle is arranged between the safety valve 13 and the wax-dissolving pour point depressing reaction kettle 4; a paraffin control and viscosity reduction reaction kettle pressurizing valve 21 is arranged between the safety valve 13 and the paraffin control and viscosity reduction reaction kettle 6.
A medicament valve 14 is arranged between the metering tank 3 and the metering tank; a wax-dissolving and pour-point-reducing reaction kettle additive valve 17 is arranged between the metering tank 3 and the wax-dissolving and pour-point-reducing reaction kettle 4, and a wax-preventing and viscosity-reducing reaction kettle additive valve 23 is arranged between the metering tank 3 and the wax-preventing and viscosity-reducing reaction kettle 6; a paraffin-dissolving and pour-point-reducing reaction kettle blow-down valve 20 is arranged between the paraffin-dissolving and pour-point-reducing reaction kettle 4 and the waste liquid tank 11, and a paraffin-preventing and pour-reducing reaction kettle blow-down valve 24 is arranged between the paraffin-preventing and pour-reducing reaction kettle 6 and the waste liquid tank 11;
The device also comprises a paraffin-dissolving and viscosity-reducing reaction kettle pressure release valve 19, a paraffin-preventing and viscosity-reducing reaction kettle pressure release valve 22 and a waste liquid tank pressure release valve 25 which are respectively used for releasing pressure for the paraffin-dissolving and viscosity-reducing reaction kettle 4, the paraffin-preventing and viscosity-reducing reaction kettle 6 and the waste liquid tank 11.
Transparent parts for observation are arranged on the surfaces of the metering tank 3, the paraffin dissolving and pour point depressing reaction kettle 4 and the paraffin preventing and viscosity reducing reaction kettle 6; the wax-dissolving and pour-point-reducing reaction kettle 4 and the wax-preventing and viscosity-reducing reaction kettle 6 are provided with stirring devices; a metering tank pressure gauge 27 for monitoring the pressure in the metering tank 3 is arranged at the downstream end of the metering tank pressurizing valve 15; a wax-dissolving and pour point-reducing reaction kettle pressure gauge 28 for monitoring the pressure in the wax-dissolving and pour point-reducing reaction kettle 4 is arranged at the downstream end of the wax-dissolving and pour point-reducing reaction kettle pressure valve 16; a wax-control viscosity-reduction reaction kettle pressure gauge 29 for monitoring the pressure in the wax-control viscosity-reduction reaction kettle 6 is arranged at the downstream end of the wax-control viscosity-reduction reaction kettle pressure valve 21; and a waste liquid tank pressure gauge 30 for monitoring the pressure in the waste liquid tank 11.
The stirring device in this embodiment is a magnetic stirrer 7, the wax-dissolving and pour-point-reducing reaction kettle 4 and the wax-preventing and viscosity-reducing reaction kettle 6 are respectively provided with a group of magnetic stirrers 7, and those skilled in the art should know that the corresponding kettle body is necessarily provided with a matched stirrer 31.
As shown in fig. 1, this embodiment further includes a drain valve 18 and a waste liquid tank inlet valve 26, and the valves are opened in response to waste liquid recovery.
In one or more preferred embodiments, the metering tank 3 as shown in fig. 6 includes a third cylinder wall 301, a third upper end cap 302, and a third lower end cap 303, where the third upper end cap 302 and the third lower end cap 303 are fixedly connected by a third bolt 304; the third upper end cover 302 is provided with a pressurizing and emptying port 305, and the third lower end cover 303 is provided with an additive discharging port 306.
Preferably, the wall of the third cylinder wall 301 is made of quartz glass, scales are arranged on the wall, and the third upper end cover and the third lower end cover are made of stainless steel.
The functions of the embodiment are diversified, the integrated test of wax dissolution, pour point depressing, viscosity reducing and wax control under the condition of pressure is realized, and the effect evaluation of the gaseous unconventional wax removal and prevention agent and viscosity reducing pour point depressing agent under normal pressure can be carried out; the two kettles of the reaction kettle are four-purpose, the viscosity test and the wax precipitation experiment can be carried out under pressure at the same time, the experimental steps are reduced, the experimental time and the experimental space are saved, and the experimental efficiency is improved; the structure and the sealing mode of the paraffin control and viscosity reduction reaction kettle and the paraffin precipitation pipe reduce the measurement error of the paraffin precipitation amount and improve the precision of experimental data; the wax ball and the medicament can be quickly separated after the wax dissolving experiment is finished, the operation is convenient, the inclination angle is accurate, and the operation error is effectively reduced; and the observation of the process and the phenomenon is convenient to realize, which is beneficial to experimental teaching.
Example 2:
based on the embodiment 1, the structure of the wax-dissolving pour point depressing reaction kettle 4 in the embodiment is shown in fig. 2 and 3: the device comprises a first cylinder wall 401, a first upper end cover 402 and a first lower end cover 403 which are respectively connected at two ends of the first cylinder wall 401 in a sealing way, and a first top cover 405 which is matched on the first upper end cover 402 in a sealing way, wherein the first top cover 405 is detachably connected with the first upper end cover 402 through a first buckle 404; the first upper end cover 402 is provided with a first channel 406 for adding agent, pressurizing and decompressing, and the first lower end cover 403 is provided with a first liquid outlet 407 for discharging liquid;
the inner wall of the first upper end cover 402 is also fixedly connected with a ball rail 408 for placing wax balls, and the ball rail 408 gradually inclines upwards from one end close to the inner wall of the first upper end cover 402 to one end far away from the inner wall of the first upper end cover 402;
the filter baffle 409 is fixed at the top of the first lower end cover 403, the filter baffle 409 divides the interior of the first cylinder wall 401 into two parts, and the first liquid outlet 407 and the ball rail 408 are respectively positioned at two sides of the filter baffle 409; the device also comprises an angle adjusting mechanism for tilting the wax-dissolving pour point depressing reaction kettle 4.
The first upper end cover 402 and the first lower end cover 403 are fixedly connected through a first bolt 410;
A first thermometer-inserting tube 411 inserted into the first cylinder wall 401 is provided on the first top cover 405;
the top end of the filtering baffle 409 is higher than the ball rail 408, and the top end of the filtering baffle 409 has a limit mechanism that prevents the dissolved wax ball residue from moving to the other side of the filtering baffle 409.
The angle adjusting mechanism in the embodiment comprises a dial 412 and a rotary rod 413, wherein the lower end of the rotary rod 413 is hinged with the dial 412, and the upper end of the rotary rod 413 is connected with a handle 414; the rotary rod 413 is fixedly connected with the wax-dissolving and pour-point depressing reaction kettle 4, and the axis of the rotary rod 413 is parallel and coplanar with the axis of the wax-dissolving and pour-point depressing reaction kettle 4; the dial 412 is provided with angle scales, a plurality of first pin holes 415 are uniformly distributed on the dial 412 along the circumferential direction, and the rotary rod 413 is provided with a second pin hole 416 matched with the first pin hole 415.
Two different forms of spacing mechanisms are shown in fig. 2 and 3, respectively, wherein the spacing mechanism shown in fig. 2 blocks the wax ball by providing a protrusion on the top end of the filter screen 409, and the spacing mechanism shown in fig. 3 prevents the wax ball from moving to the other side of the filter screen by extending the height of the filter screen 409 and controlling the gap between the filter screen 409 and the first top cover 405 to be sufficiently small.
In this embodiment, the section of thick bamboo wall of dissolving wax pour point depressing reaction kettle is fixed and sealed through the spacing groove cooperation polytetrafluoroethylene sealing washer and the bolt of upper and lower end cover, one side of upper end cover is equipped with first passageway 406, be used for dissolving wax pour point depressing reaction kettle's additive, pressurization and blowdown, the opposite side has welded the half split tube of terminal microbend, be used as wax ball track, under the vertical state of dissolving wax pour point depressing reaction kettle cauldron body, the wax ball can not drop, one side of lower end cover is equipped with first leakage fluid dram 407, be used for dissolving wax pour point depressing reaction kettle leakage fluid, the filter baffle has been welded to lower end cover intermediate position, be used for separating medicament and wax ball after dissolving wax experiment, magnetic stirring piece has all been placed to filter baffle both sides, be used for stirring mixed medicament and fluid with outside magnetic stirring ware cooperation. The top cover of the wax-dissolving and pour-point-reducing reaction kettle is welded with a thermometer insertion tube, and the top cover of the wax-dissolving and pour-point-reducing reaction kettle is fixed and sealed with the kettle body of the wax-dissolving and pour-point-reducing reaction kettle through a buckle. The whole kettle body of the wax dissolving and pour point depressing reaction kettle is fixed on a rotary rod through a clamp, the rotary rod is just on the central axis of the kettle body, the bottom end of the rotary rod and a dial are rotary hinges, the rotary rod can drive the kettle body to rotate along the left direction and the right direction, a handle and a bolt hole are arranged at the upper end of the rotary rod, the anticlockwise dial is respectively provided with the bolt hole at the positions of 0 DEG, 45 DEG and 90 DEG, a pin is inserted after the bolt holes on the rotary rod and the dial are aligned, the inclined state of the kettle body can be fixed, and the kettle body and a base are at a sufficient distance to ensure that the kettle body can be horizontally placed.
Preferably, the first cylinder wall 401 is made of quartz glass.
Example 3:
based on the embodiment 1 or 2, the structure of the wax-control viscosity-reduction reaction kettle 6 in this embodiment is shown in fig. 4:
the device comprises a second cylinder wall 601, a second upper end cover 602 and a second lower end cover 603 which are respectively connected with two ends of the second cylinder wall 601 in a sealing way, and a second top cover 604 which is matched on the second upper end cover 602 in a sealing way, wherein the second top cover 604 is detachably connected with the second upper end cover 602 through a second buckle 605;
the second upper end cover 602 is provided with a second channel 606 for adding agent, pressurizing and decompressing, and the second lower end cover 603 is provided with a second liquid outlet 607 for discharging liquid;
the second top cover 604 is connected with a vibration viscometer 608, a second thermometer inserting pipe 609 and a waxing pipe 610, and the waxing pipe 610 is communicated with the circulating water bath 10.
The connection structure of the wax precipitation pipe 610 in this embodiment is shown in fig. 5: the bottom of the second top cover 604 is provided with a mounting head 617 extending along the axial direction, and the sealing cover 611 is in threaded connection with the mounting head 617; the bottom of the sealing cover 611 is provided with a through hole 612 for the wax precipitation pipe 610 to pass through, a step surface is formed between the outer wall of the through hole 612 and the inner wall of the sealing cover 611, the top of the wax precipitation pipe 610 is provided with a seat hanging part 613 which extends out along the radial direction, and the wax precipitation pipe 610 is seat-hung on the step surface through the seat hanging part 613; sealing gaskets 614 are arranged between the seat hanging part 613 and the step surface and between the seat hanging part 613 and the mounting head 617; the water heater further comprises a cold water injection pipe 615 and a cold water outlet pipe 616 which penetrate through the second top cover 604, wherein the cold water injection pipe 615 stretches into the bottom end of the wax precipitation pipe 610, the cold water outlet pipe 616 stretches into the mounting head 617, and cold water enters the cold water injection pipe 615 from the circulating water bath 10 and flows back to the circulating water bath 10 from the cold water outlet pipe 616.
In this embodiment, the section of thick bamboo wall of wax control viscosity reduction reation kettle realizes fixing and sealing through the spacing groove cooperation polytetrafluoroethylene sealing washer and the bolt of upper and lower end cover, and its upper end cover is equipped with second passageway 606 for the dosing, the pressurization and the blowdown of wax control viscosity reduction reation kettle, and the lower extreme cover is equipped with second leakage fluid dram 607 for wax control viscosity reduction reation kettle flowing back, has placed magnetic stirring in the wax control viscosity reduction reation kettle for mix medicament and fluid with outside magnetic stirring ware cooperation. Vibration viscometer and paraffin precipitation pipe that are arranged in the paraffin control viscosity reduction reation kettle respectively are all installed on second top cap 604, and through screw thread precession extrusion polytetrafluoroethylene sealing washer realization and top cap fixed and sealed, the fixed and sealed with the paraffin control viscosity reduction reation kettle cauldron body are realized to paraffin control viscosity reduction reation kettle top cap through the buckle. The top cover of the waxing and viscosity reducing reaction kettle is also welded with a thermometer insertion pipe for placing a thermometer for measuring the temperature of experimental liquid, and simultaneously welded with a cold water injection pipe and a cold water outlet pipe, wherein the cold water injection pipe extends into the bottom end of the waxing pipe, and the circulating water bath pumps water with a certain temperature into the waxing pipe from the cold water injection pipe and pumps the water out from the cold water outlet pipe, so that the waxing pipe reaches a set temperature.
Preferably, the second cylinder wall 601 is made of quartz glass.
Example 4:
the experiment of the non-conventional paraffin removal and prevention agent and viscosity reduction agent which are in a gaseous state at normal pressure is taken as an example for illustration, a valve between a medicament tank and a metering tank is opened, the medicament enters the metering tank from the medicament tank under the action of pressure difference, a nitrogen cylinder is used for pressurizing the metering tank, and the medicament is controlled to enter a paraffin dissolution and condensation reduction reaction kettle and a paraffin prevention and viscosity reduction reaction kettle from the metering tank in a liquid state according to the designed dosage to participate in the experiment. In the experiment, certain pressure conditions in the corresponding reaction kettles are maintained, so that the medicament in the reaction kettles is always in a liquid state, and simultaneously, the medicament and the oil are fully contacted and fused by utilizing the corresponding magnetic stirrers.
Of course, if the experiment is a conventional experiment of liquid medicament, the liquid medicament which is metered by a beaker according to the designed dosing amount is directly added into a corresponding reaction kettle to participate in the experiment.
On the basis of the preparation, the embodiment can be used for independently carrying out wax dissolution experiments, condensation point test experiments, viscosity test experiments and wax precipitation experiments, and the specific method is as follows:
wax dissolution experiment: the method comprises the steps of placing weighed wax balls on ball rails in a wax-dissolving pour-point depressing reaction kettle in advance, adding a drug amount enough to submerge the wax balls into the wax-dissolving pour-point depressing reaction kettle, pressurizing by nitrogen to enable the pressure of the wax balls to be higher than the saturated vapor pressure of the drug under the experimental temperature condition, heating the drug in the kettle by a temperature control test box to enable the drug to reach the experimental temperature condition, rotating the wax balls left to rotate a kettle body of the wax-dissolving pour-point depressing reaction kettle, enabling the wax balls to slide down to the bottom of the kettle along the ball rails to participate in the experiment, rotating a rotating rod left to a 90-degree position after the experiment is finished, enabling the kettle body of the wax-dissolving pour-point depressing reaction kettle to be horizontally fixed by pins, separating the wax balls from the drug by utilizing a filtering baffle plate, driving waste liquid in the reaction kettle to a waste liquid tank by utilizing nitrogen pressurization, taking out the wax balls after the pressure relief of the wax balls, weighing the wax balls after natural airing, and calculating the wax balls dissolving wax rate by mass loss of the wax balls before and after the experiment.
Condensation point test experiment: oil and a medicament are added into a wax-dissolving and pour-point-depressing reaction kettle in proportion, the pressure of the wax-dissolving and pour-point-depressing reaction kettle is higher than the saturated vapor pressure of the medicament under the experimental temperature condition by nitrogen pressurization, the liquid in the kettle is controlled to be cooled by a temperature control test box, a rotating rod drives the kettle body to rotate leftwards by 45 degrees or 90 degrees for a certain time when the temperature is reduced to one temperature measuring point, the flowing condition of the liquid level is observed, the temperature when the liquid level does not flow any more is the condensation point of a sample (the required inclination angle in different condensation point test standards is different from the time for maintaining the inclination), and after the experiment is finished, the waste liquid in the reaction kettle is driven to a waste liquid tank by nitrogen pressurization.
Viscosity test experiment: oil and a medicament are added into the wax-preventing and viscosity-reducing reaction kettle in proportion, the pressure of the wax-preventing and viscosity-reducing reaction kettle is higher than the saturated vapor pressure of the medicament under the experimental temperature condition through nitrogen pressurization, the liquid in the kettle is heated by a temperature control test box to reach the experimental temperature condition, the data acquisition computer 8 is used for acquiring and recording the viscosity data measured by the vibration viscometer 608, and after the experiment is finished, the waste liquid in the reaction kettle is driven to a waste liquid tank through nitrogen pressurization.
Wax deposition experiment: adding oil and a medicament into a paraffin control viscosity reduction reaction kettle according to a proportion, pressurizing by nitrogen to ensure that the pressure of the paraffin control viscosity reduction reaction kettle is higher than the saturated vapor pressure of the medicament under the experimental temperature condition, heating liquid in the kettle by a temperature control test box to ensure that the liquid reaches the experimental temperature condition, controlling the temperature of a paraffin deposition pipe in the reaction kettle by a circulating water bath kettle, condensing the paraffin in crude oil on the surface of the paraffin deposition pipe under the action of a temperature difference, driving waste liquid in the reaction kettle to a waste liquid tank by utilizing the pressurization of a nitrogen bottle after the experiment is finished, removing the paraffin deposition pipe after the pressure of the paraffin control viscosity reduction reaction kettle is relieved, naturally airing the paraffin deposition pipe, and weighing the paraffin deposition pipe, thereby obtaining the paraffin deposition amount by the mass difference between the paraffin deposition pipe and the paraffin deposition pipe.
Example 5:
the multifunctional teaching experiment method is based on the multifunctional teaching experiment system in the application, takes the unconventional paraffin removal and prevention agent and the viscosity reduction pour point depressant dimethyl ether which are in a gaseous state under normal pressure as medicaments to develop paraffin dissolution, pour point reduction, viscosity reduction and paraffin prevention experiments of the dimethyl ether, and comprises the following detailed steps:
step one: and after the pressure is released to the gauge 27, the paraffin-dissolving and pour-reducing reaction kettle pressure gauge 28, the paraffin-preventing and viscosity-reducing reaction kettle pressure gauge 29 and the waste liquid tank pressure gauge 30 are zero, all valves in the system are closed.
Step two: the reagent valve 14 is opened, the reagent is introduced into the metering tank 3 under the pressure of the reagent tank, and the reagent valve 14 is closed after the required quantity of the reagent for the experiment is added.
Step three: the pin is inserted into a corresponding pin hole at the position of 0 degree on the dial, so that the kettle body of the wax-dissolving pour point depressing reaction kettle 4 is vertically fixed.
Step four: the initial weight of the wax ball is weighed and recorded as w 0 And placing the wax ball on a ball rail in the wax-dissolving and pour-point depressing reaction kettle 4, covering the top cover of the wax-dissolving and pour-point depressing reaction kettle 4, fixing and sealing by a buckle, and placing a thermometer in a thermometer insertion hole.
Step five: slowly opening a solvent adding valve 17 of the wax-dissolving and pour-point-reducing reaction kettle, allowing the solvent to slowly enter the wax-dissolving and pour-point-reducing reaction kettle 4 under the pressure of the metering tank 3, and closing the solvent adding valve 17 of the wax-dissolving and pour-point-reducing reaction kettle after the solvent is added enough to submerge the wax ball; the pressure reducing valve 12 and the pressure valve 16 of the wax-dissolving and pour point-reducing reaction kettle are regulated, the reading of the pressure gauge 28 of the wax-dissolving and pour point-reducing reaction kettle is observed, the pressure of the pressure valve 16 of the wax-dissolving and pour point-reducing reaction kettle is closed after the pressure of the wax-dissolving and pour point-reducing reaction kettle 4 is increased to 1MPa (the saturated vapor pressure of dimethyl ether at 40 ℃ is 0.9 MPa).
Step six: setting the temperature of the temperature control test box 9 to be 40 ℃ for heating, checking a thermometer in the paraffin dissolving and pour point depressing reaction kettle 4, pulling out pins after the temperature of the traditional Chinese medicine in the kettle reaches 40 ℃, rotating the rod leftwards, sliding the wax ball into the medicine along the ball track, recovering the vertical state of the kettle body and starting timing;
step seven: stopping timing after the reaction t time, rotating the rod left, fixing the kettle body of the wax-dissolving and pour-point-reducing reaction kettle 4 by using pins to be in a horizontal state, separating the wax balls from the medicament by using a filtering baffle, stopping heating of the temperature-controlling test box 9, simultaneously adjusting the pressure reducing valve 12 to ensure that the outlet pressure of nitrogen is slightly more than 1MPa, opening the inlet valve 26 of the waste liquid tank and the drain valve 20 of the wax-dissolving and pour-point-reducing reaction kettle, opening the pressurizing valve 16 of the wax-dissolving and pour-point-reducing reaction kettle, driving all waste liquid in the wax-dissolving and pour-point-reducing reaction kettle 4 into the waste liquid tank 11 by using nitrogen, closing the inlet valve 26 of the waste liquid tank, the drain valve 20 of the wax-dissolving and pour-reducing reaction kettle and the pressurizing valve 16 of the wax-dissolving and pour-reducing reaction kettle, and recovering the vertical state of the kettle body of the wax-dissolving and pour-reducing reaction kettle 4.
Step eight: opening a pressure release valve 19 of the wax-dissolving and pour-point-reducing reaction kettle to release pressure for the wax-dissolving and pour-point-reducing reaction kettle 4 until the number of the pressure gauge 28 of the wax-dissolving and pour-point-reducing reaction kettle is zero, and closing the pressure release valve 19 of the wax-dissolving and pour-point-reducing reaction kettle; opening the top cover of the wax dissolving and pour point depressing reaction kettle 4, taking out the wax ball, and marking the weight of the wax ball after naturally airing as w, wherein the weight is w 0 W is the amount of the wax ball dissolved by the medicament at 40 ℃ in the t time.
Step nine: the high-wax-content thick oil of the X oil field which is solid at normal temperature is taken out by a beaker, and is heated in a circulating water bath 10 to be liquid for standby.
Step ten: after the paraffin dissolving and pour point depressing reaction kettle 4 is cleaned, adding a certain amount of crude oil in step nine into the kettle, keeping the kettle body in a vertical state, covering the top cover of the paraffin dissolving and pour point depressing reaction kettle 4, fixing and sealing by a buckle, and placing a thermometer into a corresponding thermometer insertion hole.
Step eleven: the pressure reducing valve 12 and the pressure valve 16 of the wax-dissolving and pour point-reducing reaction kettle are regulated, the reading of the pressure gauge 28 of the wax-dissolving and pour point-reducing reaction kettle is observed, the pressure of the pressure valve 16 of the wax-dissolving and pour point-reducing reaction kettle is closed after the pressure of the wax-dissolving and pour point-reducing reaction kettle 4 is increased to 1MPa (the saturated vapor pressure of dimethyl ether at 40 ℃ is 0.9 MPa).
Step twelve: setting the temperature of a temperature control test box (9) to 40 ℃ for heating, ensuring that crude oil under the T temperature condition can flow, setting the temperature control test box (9) to cool by 1 ℃, checking a thermometer in a paraffin dissolving and pour point depressing reaction kettle (4), pulling out a pin after the crude oil temperature in the kettle reaches the set temperature, slowly rotating a rod leftwards, observing the fluidity of the crude oil in the paraffin dissolving and pour point depressing reaction kettle, if the crude oil liquid level moves, recovering the vertical state of the reaction kettle body to continuously cool by 1 ℃ until the rotating rod leftwards reaches the horizontal state and is kept for 5 seconds (refer to the inclination angle and the keeping time in the SY/T0541-2009 standard of the crude oil condensation point determination method), and recording the temperature at the moment as the initial condensation point T of the crude oil when the crude oil liquid level does not move all the time 1 And simultaneously recovering the vertical state of the kettle body of the wax-dissolving and pour-point-depressing reaction kettle 4.
Step thirteen: opening a pressure release valve 19 of the wax-dissolving and pour-point-reducing reaction kettle, observing a pressure gauge 28 of the wax-dissolving and pour-point-reducing reaction kettle, and closing the pressure release valve 19 of the wax-dissolving and pour-point-reducing reaction kettle after the pressure of the wax-dissolving and pour-point-reducing reaction kettle 4 is released to zero; slowly opening the additive valve 17 of the wax-dissolving and pour-point-reducing reaction kettle, allowing the medicament to slowly enter the wax-dissolving and pour-point-reducing reaction kettle 4 under the pressure of the metering tank 3, closing the additive valve 17 of the wax-dissolving and pour-point-reducing reaction kettle when the additive amount reaches 1% by volume, and repeating the step eleven.
Step fourteen: stirring with magnetic stirrer for 5min to thoroughly mix the agent with oil, repeating the steps twelve to obtain crude oil with 1% of the added volume and the condensation point of T 2 。
Fifteen steps: the pressure reducing valve 12 is adjusted to make the nitrogen outlet pressure slightly larger than the value of the waste liquid tank pressure gauge 30 at the moment, the waste liquid tank inlet valve 26 and the paraffin dissolving and pour point depressing reaction kettle blow-down valve 20 are opened, the paraffin dissolving and pour point depressing reaction kettle pressurizing valve 16 is opened, all the waste liquid in the paraffin dissolving and pour point depressing reaction kettle 4 is driven into the waste liquid tank 11 through nitrogen, and then the waste liquid tank inlet valve 26, the paraffin dissolving and pour point depressing reaction kettle blow-down valve 20 and the paraffin dissolving and pour point depressing reaction kettle pressurizing valve 16 are closed.
Step sixteen: the initial weight of the wax deposition tube was weighed and recorded as m 0 。
Seventeenth step: adding a certain amount of crude oil in the step nine into the wax-preventing viscosity-reducing reaction kettle 6; a vibration viscometer and a waxing pipe are arranged on the top cover of the waxing and viscosity reducing reaction kettle 6, a thermometer is placed in a thermometer inserting pipe, and the top cover and the circulating water bath 10 are connected; the data acquisition computer 4 and the viscosity data acquisition software are started.
Eighteenth step: the temperature of the temperature-controlled test chamber 9 was set at 40 ℃.
Nineteenth step: checking a thermometer in the wax-preventing and viscosity-reducing reaction kettle 6, covering the top cover of the wax-preventing and viscosity-reducing reaction kettle 6 after the oil temperature reaches 40 ℃, and fixing and sealing by using a buckle; the pressure reducing valve 12 and the pressurizing valve 21 of the wax-preventing and viscosity-reducing reaction kettle are regulated, the reading of the pressure gauge 29 of the wax-preventing and viscosity-reducing reaction kettle is observed, the pressure of the wax-preventing and viscosity-reducing reaction kettle 6 is increased to 1MPa (the saturated vapor pressure of dimethyl ether at 40 ℃ is 0.9 MPa), and then the pressurizing valve 21 of the wax-preventing and viscosity-reducing reaction kettle is closed.
Twenty steps: starting experiment timing, starting viscosity data acquisition by using a vibration viscometer, stopping data acquisition after viscosity data are stabilized, ending viscosity test, and obtaining stabilized viscosity data mu 0 The original viscosity of the blank oil at 40 ℃ is recorded.
Step twenty-one: after 30min of experimental timing, the pressure reducing valve 12 is regulated to enable the nitrogen outlet pressure to be slightly higher than 1MPa, the waste liquid tank inlet valve 26 and the paraffin control and viscosity reduction reaction kettle drain valve 24 are opened, the paraffin control and viscosity reduction reaction kettle pressurizing valve 21 is opened, all waste liquid in the paraffin control and viscosity reduction reaction kettle 6 is driven into the waste liquid tank 11 through nitrogen, and then the waste liquid tank inlet valve 26, the paraffin control and viscosity reduction reaction kettle drain valve 24 and the paraffin control and viscosity reduction reaction kettle pressurizing valve 21 are closed.
Twenty-two steps: opening a pressure release valve 22 of the paraffin control and viscosity reduction reaction kettle to release pressure for the paraffin control and viscosity reduction reaction kettle 6, and closing the pressure release valve 22 of the paraffin control and viscosity reduction reaction kettle after the number of the pressure gauge 29 of the paraffin control and viscosity reduction reaction kettle is zero; closing the circulating water bath 10, opening the top cover of the anti-wax and viscosity-reducing reaction kettle 6, reversely detaching the wax precipitation pipe, and recording the weight of the naturally dried wax precipitation pipe as m, wherein the weight is m-m 0 Namely the wax deposition amount of the blank oil liquid at 40 ℃.
Twenty-third steps: cleaning and airing a paraffin precipitation pipe, a vibration viscometer and a thermometer inserting pipe, and then mounting the vibration viscometer and the paraffin precipitation pipe on a top cover of the reaction kettle and inserting the thermometer; adding the same crude oil with the quantity equal to seventeen in step into a wax-preventing viscosity-reducing reaction kettle 6; setting the temperature of the temperature control test box 9 to be 40 ℃ to heat the oil in the wax-preventing and viscosity-reducing reaction kettle 6; the circulating water bath 10 is started, and the temperature is set to be 30 ℃ to heat the wax precipitation pipe.
Twenty-four steps: checking a thermometer in the wax-preventing and viscosity-reducing reaction kettle 6, covering the top cover of the wax-preventing and viscosity-reducing reaction kettle 6 after the oil temperature reaches 40 ℃, and fixing and sealing by using a buckle; slowly opening a paraffin control and viscosity reduction reaction kettle additive valve 23, allowing the medicament to slowly enter the paraffin control and viscosity reduction reaction kettle 6 under the pressure of the metering tank 3, and closing the paraffin control and viscosity reduction reaction kettle additive valve 23 when the additive amount reaches 1% by volume; the pressure reducing valve 12 and the pressurizing valve 21 of the wax-preventing and viscosity-reducing reaction kettle are regulated, the reading of the pressure gauge 29 of the wax-preventing and viscosity-reducing reaction kettle is observed, the pressure of the wax-preventing and viscosity-reducing reaction kettle 6 is increased to 1MPa (the saturated vapor pressure of dimethyl ether at 40 ℃ is 0.9 MPa), and then the pressurizing valve 21 of the wax-preventing and viscosity-reducing reaction kettle is closed.
Twenty-five steps: starting a magnetic stirrer to stir for 5min, and starting experimental timing after the medicament and the oil are fully mixed; the operation software starts viscosity data acquisition, stops data acquisition after the viscosity data is stable, ends the viscosity test, and records the obtained stable viscosity data mu as the viscosity of the additive oil at 40 ℃.
Twenty-six steps: repeating the twenty-first step and the twenty-second step to obtain the weight of the paraffin precipitation pipe which is m 'after naturally airing, then m' -m 0 Namely the wax precipitation amount of the additive oil liquid at 40 ℃.
Seventeenth step: and (5) after the experiment is finished, collecting and cleaning the instrument and equipment.
In the experimental steps, the step three to the step eight are wax dissolution experiments, the step nine to the step fifteen are pour point depressing experiments, and the step sixteen to the step twenty-six are viscosity reduction experiments and wax prevention experiments.
The wax dissolution rate of the dimethyl ether in a gaseous state at normal pressure at the temperature of 40 ℃ and the pour point depressing rate, viscosity reducing rate and wax preventing rate of the dimethyl ether in the volume adding amount of 1 percent under the condition that the oil temperature is 40 ℃ are calculated by using the obtained experimental data, wherein the pour point depressing rate, viscosity reducing rate and wax preventing rate of the high-wax-content thick oil in the X-oil field are respectively as follows:
wax dissolution rate (g/min):
pour point depression (%):
viscosity reduction rate (%):
wax control (%):
the foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, the term "coupled" as used herein may be directly coupled or indirectly coupled via other components, unless otherwise indicated.
Claims (8)
1. The multifunctional teaching experiment system for the under-pressure measurement in the petroleum field is characterized by comprising a nitrogen bottle (1), a medicament tank (2), a metering tank (3), a wax-dissolving and viscosity-reducing reaction kettle (4), a wax-preventing and viscosity-reducing reaction kettle (6) and a waste liquid tank (11), wherein the wax-dissolving and viscosity-reducing reaction kettle (4) and the wax-preventing and viscosity-reducing reaction kettle (6) are both positioned in a temperature-controlling test box (9);
The nitrogen bottle (1) is used for pressurizing the metering tank (3), the paraffin dissolving and pour point depressing reaction kettle (4) and the paraffin preventing and viscosity reducing reaction kettle (6);
the medicament canister (2) is for providing medicament to the metering canister (3);
the metering tank (3) is used for providing medicaments for the paraffin dissolving and pour point depressing reaction kettle (4) and the paraffin preventing and viscosity reducing reaction kettle (6);
the waste liquid tank (11) is used for recycling waste liquid of the wax-dissolving and pour-point-reducing reaction kettle (4) and the wax-preventing and viscosity-reducing reaction kettle (6);
the wax dissolving and pour point depressing reaction kettle (4) is used for measuring the wax dissolving rate and pour point depressing rate of the medicament;
the wax-control viscosity-reduction reaction kettle (6) is used for measuring the wax-control rate and viscosity-reduction rate of the medicament;
the output end of the nitrogen cylinder (1) is sequentially provided with a pressure reducing valve (12) and a safety valve (13);
a metering tank pressurizing valve (15) is arranged between the safety valve (13) and the metering tank (3);
a pressurizing valve (16) of the paraffin dissolving and pour point depressing reaction kettle is arranged between the safety valve (13) and the paraffin dissolving and pour point depressing reaction kettle (4);
a paraffin control and viscosity reduction reaction kettle pressurizing valve (21) is arranged between the safety valve (13) and the paraffin control and viscosity reduction reaction kettle (6); a medicament valve (14) is arranged between the medicament tank (2) and the metering tank (3);
a paraffin dissolving and pour point depressing reaction kettle dosing valve (17) is arranged between the metering tank (3) and the paraffin dissolving and pour point depressing reaction kettle (4), and a paraffin preventing and viscosity reducing reaction kettle dosing valve (23) is arranged between the metering tank (3) and the paraffin preventing and viscosity reducing reaction kettle (6);
A paraffin-dissolving and pour-point-reducing reaction kettle blow-down valve (20) is arranged between the paraffin-dissolving and pour-point-reducing reaction kettle (4) and the waste liquid tank (11), and a paraffin-preventing and pour-reducing reaction kettle blow-down valve (24) is arranged between the paraffin-preventing and pour-reducing reaction kettle (6) and the waste liquid tank (11);
the device also comprises a paraffin-dissolving and viscosity-reducing reaction kettle pressure release valve (19), a paraffin-preventing and viscosity-reducing reaction kettle pressure release valve (22) and a waste liquid tank pressure release valve (25) which are respectively used for releasing pressure for the paraffin-dissolving and viscosity-reducing reaction kettle (4), the paraffin-preventing and viscosity-reducing reaction kettle (6) and the waste liquid tank (11).
2. The multifunctional teaching experiment system for measuring the pressure in the petroleum field according to claim 1, wherein,
transparent parts for observation are arranged on the surfaces of the metering tank (3), the paraffin dissolving and pour point depressing reaction kettle (4) and the paraffin preventing and viscosity reducing reaction kettle (6); the wax-dissolving and pour-point-reducing reaction kettle (4) and the wax-preventing and viscosity-reducing reaction kettle (6) are provided with stirring devices;
a metering tank pressure gauge (27) for monitoring the pressure in the metering tank (3) is arranged at the downstream end of the metering tank pressurizing valve (15);
the downstream end of the paraffin dissolving and pour point depressing reaction kettle pressurizing valve (16) is provided with a paraffin dissolving and pour point depressing reaction kettle pressure gauge (28) for monitoring the pressure in the paraffin dissolving and pour point depressing reaction kettle (4);
The downstream end of the paraffin control and viscosity reduction reaction kettle pressurizing valve (21) is provided with a paraffin control and viscosity reduction reaction kettle pressure gauge (29) for monitoring the pressure in the paraffin control and viscosity reduction reaction kettle (6);
the device also comprises a waste liquid tank pressure gauge (30) for monitoring the pressure in the waste liquid tank (11).
3. The multifunctional teaching experiment system for measuring the pressure in the petroleum field according to claim 1 or 2, wherein the paraffin dissolving and pour point depressing reaction kettle (4) comprises a first cylinder wall (401), a first upper end cover (402) and a first lower end cover (403) which are respectively connected to two ends of the first cylinder wall (401) in a sealing way, and a first top cover (405) which is matched with the first upper end cover (402) in a sealing way, and the first top cover (405) is detachably connected with the first upper end cover (402) through a first buckle (404);
a first channel (406) for adding agent, pressurizing and decompressing is formed in the first upper end cover (402), and a first liquid outlet (407) for discharging liquid is formed in the first lower end cover (403);
the inner wall of the first upper end cover (402) is also fixedly connected with a ball rail (408) for placing a wax ball, and the ball rail (408) gradually inclines upwards from one end close to the inner wall of the first upper end cover (402) to one end far away from the inner wall of the first upper end cover (402);
The novel filter comprises a first cylinder wall (401), a first drain hole (407) and a ball rail (408), and is characterized by further comprising a filter baffle (409) fixed at the top of the first lower end cover (403), wherein the filter baffle (409) divides the interior of the first cylinder wall (401) into two parts, and the first drain hole (407) and the ball rail (408) are respectively positioned at two sides of the filter baffle (409);
the device also comprises an angle adjusting mechanism for tilting the wax dissolving and pour point depressing reaction kettle (4).
4. The multifunctional teaching experiment system for measuring the pressure in the petroleum field according to claim 3, wherein,
the first upper end cover (402) and the first lower end cover (403) are fixedly connected through a first bolt (410);
a first thermometer inserting pipe (411) inserted into the first cylinder wall (401) is arranged on the first top cover (405);
the top end of the filtering baffle (409) is higher than the ball rail (408), and the top end of the filtering baffle (409) is provided with a limiting mechanism for preventing the dissolved wax ball residues from moving to the other side of the filtering baffle (409).
5. The multifunctional teaching experiment system for measuring the pressure in the petroleum field according to claim 3, wherein the angle adjusting mechanism comprises a dial (412) and a rotary rod (413), the lower end of the rotary rod (413) is hinged with the dial (412), and the upper end of the rotary rod (413) is connected with a handle (414); the rotary rod (413) is fixedly connected with the paraffin dissolving and pour point depressing reaction kettle (4), and the axis of the rotary rod (413) is parallel and coplanar with the axis of the paraffin dissolving and pour point depressing reaction kettle (4); the dial (412) is provided with angle scales, a plurality of first pin holes (415) are uniformly distributed on the dial (412) along the circumferential direction, and the rotary rod (413) is provided with a second pin hole (416) matched with the first pin hole (415).
6. The multifunctional teaching experiment system for measuring the pressure in the petroleum field according to claim 1 or 2, wherein the paraffin control and viscosity reduction reaction kettle (6) comprises a second cylinder wall (601), a second upper end cover (602) and a second lower end cover (603) which are respectively connected to two ends of the second cylinder wall (601) in a sealing way, and a second top cover (604) which is matched with the second upper end cover (602) in a sealing way, wherein the second top cover (604) is detachably connected with the second upper end cover (602) through a second buckle (605);
a second channel (606) for adding agent, pressurizing and decompressing is formed in the second upper end cover (602), and a second liquid outlet (607) for discharging liquid is formed in the second lower end cover (603);
and the second top cover (604) is connected with a vibration viscometer (608), a second thermometer inserting pipe (609) and a wax precipitation pipe (610), and the wax precipitation pipe (610) is communicated with the circulating water bath (10).
7. The multifunctional teaching experiment system for measuring pressure in petroleum field according to claim 6, characterized by further comprising a sealing cover (611), wherein the bottom of the second top cover (604) is provided with a mounting head (617) extending along the axial direction, and the sealing cover (611) is in threaded connection with the mounting head (617); a through hole (612) for passing through the wax precipitation pipe (610) is formed in the bottom of the sealing cover (611), a step surface is formed between the outer wall of the through hole (612) and the inner wall of the sealing cover (611), a seat hanging part (613) extending out in the radial direction is arranged at the top of the wax precipitation pipe (610), and the wax precipitation pipe (610) is hung on the step surface through the seat hanging part (613); sealing gaskets (614) are arranged between the seat hanging part (613) and the step surface and between the seat hanging part (613) and the mounting head (617); the device further comprises a cold water injection pipe (615) and a cold water outlet pipe (616) which penetrate through the second top cover (604), wherein the cold water injection pipe (615) stretches into the bottom end of the wax precipitation pipe (610), the cold water outlet pipe (616) stretches into the mounting head (617), cold water enters the cold water injection pipe (615) from the circulating water bath (10), and flows back to the circulating water bath (10) from the cold water outlet pipe (616).
8. The experimental method based on the multifunctional teaching experimental system for the belt pressure measurement in the petroleum field, which is characterized by comprising the following steps:
s1, decompressing a metering tank (3), a paraffin-dissolving and viscosity-reducing reaction kettle (4), a paraffin-preventing and viscosity-reducing reaction kettle (6) and a waste liquid tank (11), and stopping all valves in the teaching experiment system after decompression is completed;
s2, enabling a sufficient amount of medicament to enter a metering tank (3) from a medicament tank (2);
s3, performing a wax dissolution experiment through a wax dissolution and pour point depressing reaction kettle (4), wherein in the experiment process, a medicament is provided through a metering tank (3), pressurization is performed through a nitrogen cylinder (1), the temperature is regulated through a temperature control test box (9), and waste liquid is recovered through a waste liquid tank (11);
s4, performing a condensation point test experiment through the wax dissolving and pour point depressing reaction kettle (4), providing a medicament through the metering tank (3), pressurizing through the nitrogen cylinder (1), adjusting the temperature through the temperature control test box (9), and recycling waste liquid through the waste liquid tank (11) in the experimental process;
s5, performing a viscosity test experiment and a paraffin precipitation experiment through the paraffin control viscosity reduction reaction kettle (6), providing a medicament through the metering tank (3), pressurizing through the nitrogen cylinder (1), adjusting the oil temperature through the temperature control test box (9), and recycling waste liquid through the waste liquid tank (11) in the experimental process.
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