CN106840944B - Electromagnetic paraffin control indoor universal dynamic test platform and method for oil well - Google Patents
Electromagnetic paraffin control indoor universal dynamic test platform and method for oil well Download PDFInfo
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- CN106840944B CN106840944B CN201710207671.9A CN201710207671A CN106840944B CN 106840944 B CN106840944 B CN 106840944B CN 201710207671 A CN201710207671 A CN 201710207671A CN 106840944 B CN106840944 B CN 106840944B
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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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The invention provides a general dynamic test platform and a method in an electromagnetic paraffin control room of an oil well, wherein the platform comprises a constant-temperature water bath box and a variable-frequency electromagnetic field excitation source, two experiment boxes are arranged in the constant-temperature water bath box, circulating pumps are respectively arranged at two sides outside the constant-temperature water bath box, and the two circulating pumps are respectively electrically connected with a frequency converter; the outlets of the two circulating pumps are respectively communicated with the inlets of the lower ends of the two experiment boxes, and the inlets of the upper ends of the two circulating pumps are respectively communicated with the outlets of the upper ends of the two corresponding experiment boxes; an inductor is connected to a pipeline of which the outlet of one experimental box is communicated with the inlet of the corresponding circulating pump; the variable frequency electromagnetic field excitation source is connected with the inductor. The platform can simulate the electromagnetic wax-preventing condition of the oil well in the dynamic environment of the appearance field safely and accurately, utilizes the related parameters selected by static experiments to carry out dynamic experiments, and obtains the production technical state in the aspect of oil well wax deposition through comparing test results and the influence rule of temperature, flow rate and the like on the electromagnetic wax-preventing effect.
Description
Technical Field
The invention relates to the field of oil well paraffin control indoor tests and methods, in particular to an electromagnetic paraffin control indoor general dynamic test platform and method for an oil well.
Background
The developed layers of the Changqing oilfield are more, the crude oil properties of the layers are different, the wax deposition degree of the oil well is different, and some blocks are serious in wax deposition. Crude oil seeps from the oil layer to the bottom of the well and rises to the ground from the bottom of the well, the pressure and temperature of the process are continuously reduced, and wax is continuously separated from the crude oil. Wax, if deposited in the reservoir flow channels, can block the reservoir voids, reducing reservoir permeability and impeding oil flow into the well; if the precipitated wax is deposited on the surface of the shaft equipment, the flow cross section area is reduced, the oil flow resistance is increased, the productivity of an oil well is affected, and the failure and damage of an oil pump can be caused; if the precipitated wax is deposited on the surface of the inner wall of the oil pipe, the effective diameter of the oil pipe can be reduced, the oil pipe can be blocked when the wax is severe, the sucker rod is blocked, the wellhead back pressure is increased, the well laying rate is increased to force the oil well to stop production, the wax precipitation can influence the normal production of the oil well, the suspension point load of the pumping well is increased, the energy consumption of the system is increased, the system efficiency and the pump efficiency are reduced, and the oil well yield is reduced. Well wax precipitation is one of the outstanding problems affecting the high and stable production of the well, so wax control is an important task in the well production process. At present, the wax prevention means are relatively more, and chemical medicines such as scale inhibitor, corrosion inhibitor and the like are generally adopted to prevent the wax deposition of the oil well. The method has the advantages of high manual strength, high cost, poor effect and environmental pollution.
Disclosure of Invention
The invention aims to solve the problem that an oil field does not specifically and accurately simulate the electromagnetic wax control condition of an oil well in a dynamic environment indoors, utilizes the optimized relevant parameters of a static experiment to carry out the dynamic experiment, and obtains the production technical state in the aspect of oil well wax control by comparing the analysis results of the experiment, thereby finding out the oil well wax control technology and method suitable for the characteristics of the oil field, obtaining the influence of temperature, flow rate and the like on the electromagnetic wax control effect, and providing a general dynamic test platform and method in the electromagnetic wax control chamber of the oil well.
The invention adopts the technical scheme that:
the utility model provides an indoor general dynamic test platform of oil well electromagnetism wax control, includes constant temperature water bath and frequency conversion electromagnetic field excitation source, be equipped with two experimental boxes in the constant temperature water bath, the outer both sides of constant temperature water bath are equipped with the circulating pump respectively, and two circulating pumps are connected with the converter respectively; the outlets of the two circulating pumps are respectively communicated with the inlets of the lower ends of the two experiment boxes, and the inlets of the upper ends of the two circulating pumps are respectively communicated with the outlets of the upper ends of the two corresponding experiment boxes; an inductor is connected to a pipeline of which the outlet of one experimental box is communicated with the inlet of the corresponding circulating pump; the variable-frequency electromagnetic field excitation source is connected with the inductor, and the variable-frequency electromagnetic field excitation source and the inductor are positioned outside the constant-temperature water bath.
The test piece is hung in the middle of the experimental box, and the test piece is stuck to the middle of the inner side of the bottom of the experimental box and the middle of the inner sides of two sides of the experimental box.
The test piece is stuck to the bottom and the inner side of the experiment box through waterproof glass cement, and is a steel sheet.
The circulating pump is a self-priming water pump.
And flow meters are arranged on pipelines, wherein the outlets of the experimental boxes are communicated with the inlets of the corresponding circulating pumps.
The flowmeter is an electromagnetic digital flowmeter.
The size of the constant-temperature water bath box is as follows: 2000cm long, 1000cm wide and 800cm high; the two experimental boxes are identical in size and are: two test boxes are arranged on a constant-temperature water bath box in parallel, wherein the test boxes are 400cm long, 200cm wide and 160cm high, and are immersed in the water bath.
The method for the electromagnetic paraffin control indoor general dynamic test of the oil well comprises the following specific steps:
firstly, weighing a plurality of test pieces respectively, hanging the test pieces in an experiment box, attaching the test pieces on the bottom and the side surfaces of the experiment box, numbering and recording the test pieces, and standing for 24 hours to ensure that the test pieces are not easy to fall off;
winding a lead at the output end of the variable-frequency electromagnetic excitation source on the inductor for 20-40 circles;
setting the temperature of a constant-temperature water bath box required by the experiment;
step four, adding equal amount of crude oil into two experimental boxes, wherein the depth is 80cm, and detecting the tightness of each part;
step five, turning on a variable frequency electromagnetic field excitation source and turning on a circulating pump to start the circulation of crude oil;
step six, observing the liquid level in the experiment boxes and the constant-temperature water bath boxes every four hours, adding equal amount of crude oil into the two experiment boxes according to the site condition, and timely supplementing water into the constant-temperature water bath boxes to ensure that the experiment boxes are immersed in water bath;
and step seven, stopping circulation after the experiment is operated for one period, removing the liquid in the experiment box and the pipeline, taking out each test piece, putting into a drying box for drying and weighing, observing the scaling form under a microscope, and recording the analysis to obtain the rule of the influence of the temperature and the flow rate on the electromagnetic wax control effect.
In the second step, the lead wire at the output end of the variable-frequency electromagnetic excitation source is wound on the inductor for 30 circles.
In the seventh step, one period is 7 days or 15 days.
The beneficial effects of the invention are as follows:
(1) The electromagnetic paraffin control indoor universal dynamic test platform for the oil well can realize no influence on human bodies and environments, belongs to safe, environment-friendly and energy-saving indoor equipment, and meets the requirements of safety and environment protection. The dynamic test platform can simulate the electromagnetic wax-preventing condition of the oil well in the dynamic environment safely and accurately indoors, dynamically tests by utilizing the optimized relevant parameters of the static test, and obtains the production technical state in the aspect of wax deposition of the oil well and the influence rule of temperature, flow rate and the like on the electromagnetic wax-preventing effect by comparing test results.
(2) The general dynamic test platform for the electromagnetic paraffin control chamber of the oil well can accurately prove the electromagnetic paraffin control effect in a short time. The electromagnetic wax-proofing method is a low-cost and high-efficiency long-acting wax-proofing method, can generate a variable-frequency strong electromagnetic field to cause internal resonance of wax molecules, so that the structure and shape of wax crystals are changed, the crystallization process of the wax molecules is inhibited, and meanwhile, a certain crushing effect is generated on formed wax crystals, so that the purpose of wax-proofing is achieved. The oil well can obviously reduce the workover times caused by wax blocking, wax blocking and the like, and the workover period of the oil well is prolonged; the oil well production time rate can be obviously improved due to the reduction of the hot washing and operation times, and continuous production is ensured, so that the purpose of increasing the crude oil yield is achieved; after the electromagnetic wax control is used for the oil well, the fluid resistance is obviously reduced, and compared with the original record, the fluid running speed can be improved by 10% -15%, so that the pump efficiency and the system efficiency are improved.
Compared with chemical paraffin removal and prevention, the electromagnetic paraffin prevention has no maintenance workload, is not influenced by severe environments such as rainy and snowy weather, is not influenced by road and mechanical faults, and solves the problems of long-distance road and poor road conditions and difficult chemical adding and hot washing operation of an oil well.
Electromagnetic wax control has no side effect, and chemical wax remover added from a wellhead can remain in crude oil and pollute the environment. The electromagnetic wax control application can solve the problems of high medicament cost, high labor intensity, frequent wax removal times and the like.
The oil well frequency conversion electromagnetic wax control efficiency is high, the action time is long, the use is convenient, the pipeline is not required to be cut, the production and installation stop is not required, the power is low, the energy is saved, the environment is protected, the safety and the reliability are realized, the use of chemical medicines such as scale inhibitors, corrosion inhibitors and the like is omitted or reduced, the manual scale blocking and removing cost is saved, and the application prospect is quite wide.
From the design function, safety and environmental protection, convenient operation has ensured the reliability, the commonality and the accuracy of the indoor general dynamic test platform of oil well electromagnetism wax control.
The invention will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of a general dynamic test platform in an electromagnetic paraffin control chamber of an oil well.
In the drawings, reference numerals are: 1. a frequency converter; 2. a circulation pump; 3. a variable frequency electromagnetic field excitation source; 4. an inductor; 5. a constant temperature water bath box; 6. a test piece; 7. an experiment box; 8. a flow meter.
Detailed Description
Example 1:
the invention aims to solve the problem that an oil field does not specifically and accurately simulate the electromagnetic wax control condition of an oil well in a dynamic environment indoors, utilizes the related parameters which are optimized by a static experiment to carry out a dynamic experiment, and obtains the production technical state in the aspect of oil well wax control by comparing the analysis results of the experiment, thereby finding out the oil well wax control technology and method which are suitable for the characteristics of the oil field, obtaining the influence of temperature, flow rate and the like on the electromagnetic wax control effect, and providing a general dynamic test platform and method in the electromagnetic wax control chamber of the oil well as shown in figure 1.
The utility model provides an indoor general dynamic test platform of oil well electromagnetism wax control, includes constant temperature water bath 5 and frequency conversion electromagnetic field excitation source 3, be equipped with two experiment boxes 7 in the constant temperature water bath 5, the outer both sides of constant temperature water bath 5 are equipped with circulating pump 2 respectively, and two circulating pump 2 are connected with converter 1 respectively; the outlets of the two circulating pumps 2 are respectively communicated with inlets at the lower ends of the two experiment boxes 7, and inlets at the upper ends of the two circulating pumps 2 are respectively communicated with outlets at the upper ends of the corresponding two experiment boxes 7; an inductor 4 is connected to a pipeline of which the outlet of one experiment box 7 is communicated with the inlet of the corresponding circulating pump 2; the variable-frequency electromagnetic field excitation source 3 is connected with the inductor 4, and the variable-frequency electromagnetic field excitation source 3 and the inductor 4 are positioned outside the constant-temperature water bath 5.
The platform in the invention comprises a temperature control part and a fluid circulation part. Wherein the fluid circulation part can be further divided into an electromagnetic field treatment part, a contrast experiment part and a flow rate control part.
Two circulating pumps 2 are selected for the experiment to respectively provide power required by circulation for the electromagnetic field treatment part and the comparison experiment part. The electromagnetic field treatment part inputs the output end of the variable frequency electromagnetic excitation source 3 to the inductor 4 through a wire in the experimental process to form a variable frequency electromagnetic field to carry out electromagnetic treatment on the flowing liquid, and the comparison experimental part is directly communicated with the experimental box 7 through a pipeline to realize circulation. In the flow rate control section, a frequency converter 1 is used to control the flow rate of the fluid, and the rotation speed of the circulation pump 2 can be changed by adjusting a frequency knob of the frequency converter 1, thereby realizing the control of the flow rate of the fluid. Crude oil is used as the fluid in the invention.
A temperature control part: in order to control the temperature of the crude oil and make the temperature constant at a set value as much as possible, the experiment is carried out by placing the experiment box in a constant-temperature water bath box 5 to ensure that the temperature of the tested crude oil is stable.
In order to enable crude oil to circulate and the electromagnetic field treatment part and the comparison experiment part not to interfere with each other, two experiment boxes 7 with the same size are processed, and two experiment boxes 7 are juxtaposed on the constant-temperature water bath box 5 to submerge the box body in the water bath during experiments.
Electromagnetic wax control mechanism of oil well:
in the experimental process, the output end of the variable frequency electromagnetic excitation source 3 is input to the inductor 4 through a lead to form a variable frequency electromagnetic field to carry out electromagnetic treatment on flowing liquid, according to the electromagnetic wave propagation theory, an electric field is converted into a magnetic field, the magnetic field is converted into an electric field, the electromagnetic field propagates along the oil well pipe line to two ends, the magnetic field acts on crude oil in the pipe line in the energy propagation process along the pipe line, and the magnetic field is applied to the crude oil in the pipe line through a magneto colloid effect: the waxy points in the crude oil are provided with negative charges, and under the action of an induced magnetic field, the intermolecular forces of the waxy points are disturbed, so that the waxy points are not arranged according to the original rule any more, the growth of wax crystals is inhibited, and the wax crystallization process is slowed down; through the hydrogen bond mutagen effect: under the action of a magnetic field with certain intensity, the hydrogen bond of the wax can be broken, and the angle or strength of the wax is changed, so that the wax is not easy to form a framework, the agglomeration among wax crystals is destroyed, and the wax crystals are not easy to aggregate. Thus, the wax is prevented from being separated out from the crude oil and accumulated on the inner surface of the oil well barrel and the sucker rod, so that the wax loses the capability of separating from the crude oil and being deposited on the inner surface of the oil well barrel and the sucker rod, wax molecules are suspended in the crude oil, and the wax is not easy to crystallize and separate out, thereby achieving the aim of preventing the wax.
The embodiment provides an electromagnetic paraffin control indoor general dynamic test platform for an oil well, as shown in fig. 1, which can simulate the electromagnetic paraffin control condition of the oil well in the dynamic environment safely and accurately in an indoor environment, perform dynamic experiments by utilizing the optimized relevant parameters of static experiments, know the current production technology state of the paraffin control of the oil well through the comparison of test results, find the oil well paraffin control technology and method suitable for the oil field characteristics, master the law of reducing the energy consumption of the electromagnetic paraffin control system of the oil well, and obtain the influence law of temperature, flow rate and the like on the electromagnetic paraffin control effect.
Example 2:
based on the above embodiment, in this embodiment, the test piece 6 is hung at the center in the test box 7, and the test piece 6 is attached at the center of the inner side of the bottom of the test box 7 and at the center of the inner sides of two sides of the bottom of the test box.
The test piece 6 is stuck to the bottom and the inner side of the experiment box 7 through waterproof glass cement, and the test piece 6 is a steel sheet.
The circulating pump 2 is a self-priming water pump.
And the pipelines of the outlets of the experiment boxes 7 communicated with the inlets of the corresponding circulating pumps 2 are respectively provided with a flowmeter 8.
In the flow rate control section, a flow meter 8 is used for flow rate display; in order to control the flow rate of the fluid, the frequency converter 1 is used, and the rotating speed of the circulating pump 2 can be changed by adjusting the frequency knob of the frequency converter 1, so that the control of the flow rate of the fluid is realized. For more intuitive control of flow, the flow meter 8 employed in this embodiment is an electromagnetic digital flow meter.
The size of the constant-temperature water bath box 5 is as follows: 2000cm long, 1000cm wide and 800cm high; the two experiment boxes 7 are the same in size and are: two test boxes 7 are juxtaposed on the constant temperature water bath box 5, and the test boxes 7 are immersed in the water bath, wherein the length is 400cm, the width is 200cm and the height is 160 cm.
The constant temperature water bath box 5 is 2000cm long, 1000cm wide and 800cm high. In order to enable temperature control, the temperature control part uses 1 super thermostat to circulate with the water in the water tank. The temperature of the water in the water tank can be kept constant at a set temperature by adjusting the temperature control element of the super-thermostat. In order to enable crude oil to circulate and the electromagnetic field treatment part and the comparison experiment part not to interfere with each other, two experiment boxes 7 (with the length of 400cm, the width of 200cm and the height of 160 cm) with the same size are processed, and when in experiment, the two experiment boxes 7 are arranged in parallel on a constant-temperature water bath box, so that most of the box bodies are immersed in the water bath.
In order to obtain the wax deposition amount at different positions, a plurality of test pieces 6 were used in the experiment. 2 test pieces 6 are hung in the two test boxes by iron wires respectively, and the positions of the electromagnetic field treatment part and the test piece of the comparison test part are consistent. A test piece 6 was attached to the bottom and two sides of the two test boxes 7 with waterproof glass cement.
Basic functions of the indoor general dynamic test platform:
(1) The energy-saving environment-friendly skid-mounted indoor equipment has no influence on human bodies and the environment;
(2) The crude oil can flow circularly, and the electromagnetic field treatment part and the contrast part are in the same environment but are independent and do not affect each other;
(3) Being able to regulate and measure the flow rate of crude oil;
(4) The temperature of crude oil can be measured and regulated, and the temperature can be kept constant;
(5) The electromagnetic wax-preventing condition of the oil well under the dynamic environment is accurately simulated indoors, the dynamic experiment is carried out by utilizing the optimized relevant parameters of the static experiment, the comparison result can be accurately analyzed, and the influence of temperature, flow speed and the like on the electromagnetic wax-preventing effect can be obtained.
Example 3:
on the basis of the embodiment, in the embodiment, a general dynamic test method in an electromagnetic paraffin control room of an oil well is provided, which specifically comprises the following steps:
firstly, weighing a plurality of test pieces 6 respectively, hanging the test pieces 6 in an experiment box 7, attaching the test pieces 6 on the bottom and the side surfaces of the experiment box 7, numbering and recording the test pieces 6, and standing for 24 hours to ensure that the test pieces 6 are not easy to fall off;
winding a lead at the output end of the variable-frequency electromagnetic excitation source 3 on the inductor 4 for 20-40 circles;
step three, setting the temperature of the constant-temperature water bath tank 5 required by the experiment;
step four, adding equal amount of crude oil into two experiment boxes 7, wherein the depth is 80cm, and detecting the tightness of each part;
step five, turning on a variable frequency electromagnetic field excitation source 3 and turning on a circulating pump 2 to start the circulation of crude oil;
step six, observing the liquid level in the experiment box 7 and the constant-temperature water bath box 5 every four hours, adding the same amount of crude oil into the two experiment boxes according to the site condition, and timely supplementing water into the constant-temperature water bath box 5 to ensure that the experiment box 7 is immersed in water bath;
and step seven, stopping circulation after the experiment is operated for one period, removing the liquid in the experiment box 7 and the pipeline, taking out each test piece 6, putting into a drying box for drying and weighing, observing the scaling form under a microscope, and recording the analysis to obtain the rule of the influence of the temperature and the flow rate on the electromagnetic wax control effect.
In the second step, the lead wire at the output end of the variable-frequency electromagnetic excitation source 3 is wound on the inductor 4 for 30 circles.
In the seventh step, one period is 7 days or 15 days.
After one period, the bottom and the two sides of the two experiment boxes are respectively stuck with a test piece, the test pieces are moved out of the experiment boxes, the test pieces and the patches are taken out and put into a drying box for drying, the test pieces and the patches are weighed on an electronic balance, the wax deposition form is observed under a microscope, and the comparison analysis test result is carried out.
Through the comparison result, the weight of the test piece 6 in the test box 7 which is electrified and electromagnetic is almost unchanged, while the weight of a plurality of test pieces 6 in the test box 7 for normal experiments is obviously increased, and wax is formed on the test pieces 6, so that the weight of the test pieces 6 is obviously increased. Therefore, the electromagnetic experiment provided by the invention can effectively prevent wax deposition. Meanwhile, the test piece 6 is made of steel sheets, namely the materials of pipelines (namely oil pipes) connected with the components, so that the service life of the pipelines can be effectively prolonged.
The electromagnetic paraffin control indoor universal dynamic test platform for the oil well can realize no influence on human bodies and environments, belongs to safe, environment-friendly and energy-saving indoor equipment, and meets the requirements of safety and environment protection. The dynamic test platform can simulate the electromagnetic wax-preventing condition of the oil well in the dynamic environment safely and accurately indoors, utilizes the related parameters selected by static experiments to carry out dynamic experiments, and obtains the production technical state of the oil well in the aspect of wax deposition by comparing test results, thereby finding out the oil well wax-preventing technology and method suitable for the oil field characteristics and obtaining the influence rules of temperature, flow rate and the like on the electromagnetic wax-preventing effect.
The general dynamic test platform for the electromagnetic paraffin control chamber of the oil well can prove the electromagnetic paraffin control effect in a short time. The method is a low-cost and high-efficiency long-acting wax-proofing method, can generate a variable-frequency strong electromagnetic field to cause internal resonance of wax molecules, so that the structure and shape of wax crystals are changed, the crystallization process of the wax molecules is inhibited, and meanwhile, a certain crushing effect is generated on the formed wax crystals, so that the purpose of wax proofing is achieved. The number of well repair operations caused by wax blocking, wax blocking and the like can be obviously reduced, and the well repair period of an oil well can be prolonged; the oil well production time rate can be obviously improved due to the reduction of the hot washing and operation times, and continuous production is ensured, so that the purpose of increasing the crude oil yield is achieved; after the electromagnetic wax control is used for the oil well, the fluid resistance is obviously reduced, and compared with the original record, the fluid running speed can be improved by 10% -15%, so that the pump efficiency and the system efficiency are improved.
Compared with chemical paraffin removal and prevention, the electromagnetic paraffin prevention has no maintenance workload, is not influenced by severe environments such as rainy and snowy weather, is not influenced by road and mechanical faults, and solves the problems of long-distance road and poor road conditions and difficult chemical adding and hot washing operation of an oil well.
Electromagnetic wax control has no side effect, and chemical wax remover added from a wellhead can remain in crude oil and pollute the environment. The electromagnetic wax control application can solve the problems of high medicament cost, high labor intensity, frequent wax removal times and the like.
The oil well frequency conversion electromagnetic wax control efficiency is high, the action time is long, the use is convenient, the pipeline is not required to be cut, the production and installation stop is not required, the power is low, the energy is saved, the environment is protected, the safety and the reliability are realized, the use of chemical medicines such as scale inhibitors, corrosion inhibitors and the like is omitted or reduced, the manual scale blocking and removing cost is saved, and the application prospect is quite wide.
The foregoing examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and all designs that are the same or similar to the present invention are within the scope of the present invention.
Claims (6)
1. An indoor general dynamic test platform of oil well electromagnetism wax control, its characterized in that: the intelligent constant-temperature water bath device comprises a constant-temperature water bath box (5) and a variable-frequency electromagnetic field excitation source (3), wherein two experiment boxes (7) are arranged in the constant-temperature water bath box (5), circulating pumps (2) are respectively arranged at the two outer sides of the constant-temperature water bath box (5), and the two circulating pumps (2) are respectively and electrically connected with a frequency converter (1); the outlets of the two circulating pumps (2) are respectively communicated with inlets at the lower ends of the two experiment boxes (7), and inlets at the upper ends of the two circulating pumps (2) are respectively communicated with outlets at the upper ends of the corresponding two experiment boxes (7); an inductor (4) is connected to a pipeline of which the outlet of one experiment box (7) is communicated with the inlet of the corresponding circulating pump (2); the variable-frequency electromagnetic field excitation source (3) is connected with the inductor (4), and the variable-frequency electromagnetic field excitation source (3) and the inductor (4) are positioned outside the constant-temperature water bath tank (5);
the center of the inner side of the bottom of the experimental box and the center of the inner sides of two sides of the bottom of the experimental box are respectively stuck with a test piece;
a test piece (6) is hung in the center of the inside of the experimental box (7), and the test piece (6) is stuck to the center of the inner side of the bottom of the experimental box (7) and the center of the inner parts of two side surfaces of the experimental box;
the test piece (6) is stuck to the bottom and the inner side of the experiment box (7) through waterproof glass cement, and the test piece (6) is a steel sheet;
the circulating pump (2) is a self-priming water pump;
and flow meters (8) are arranged on pipelines, wherein the outlets of the experiment boxes (7) are communicated with the inlets of the corresponding circulating pumps (2).
2. The electromagnetic paraffin control indoor universal dynamic test platform for an oil well according to claim 1, wherein: the flowmeter (8) is an electromagnetic digital flowmeter.
3. The electromagnetic paraffin control indoor universal dynamic test platform for an oil well according to claim 1, wherein: the size of the constant-temperature water bath box (5) is as follows: 2000cm long, 1000cm wide and 800cm high; the two experiment boxes (7) are identical in size and are of the following size: two experimental boxes (7) are arranged on the constant-temperature water bath box (5) in parallel, wherein the length of the experimental boxes is 400cm, the width of the experimental boxes is 200cm, and the height of the experimental boxes is 160cm, and the experimental boxes (7) are immersed in the water bath.
4. A general dynamic test method in an electromagnetic paraffin control room of an oil well is provided by the general dynamic test platform in the electromagnetic paraffin control room of the oil well according to any one of claims 1-3, which is characterized in that: the method comprises the following specific steps:
firstly, weighing a plurality of test pieces (6) respectively, hanging the test pieces (6) in an experiment box (7), attaching the test pieces (6) on the bottom and the side surfaces of the experiment box (7), numbering and recording the test pieces (6), and standing for 24 hours to ensure that the test pieces (6) are not easy to fall off;
winding a lead at the output end of the variable-frequency electromagnetic excitation source (3) on the inductor (4) for 20-40 circles;
setting the temperature of a constant-temperature water bath box (5) required by the experiment;
step four, adding equal amount of crude oil into two experimental boxes (7), wherein the depth is 80cm, and detecting the tightness of each part;
step five, turning on a variable-frequency electromagnetic field excitation source (3) and turning on a circulating pump (2) to start the circulation of crude oil;
step six, observing the liquid level in the experiment box (7) and the constant-temperature water bath box (5) every four hours, adding the same amount of crude oil into the two experiment boxes according to the site condition, and timely supplementing water into the constant-temperature water bath box (5), so as to ensure that the experiment box (7) is immersed in water bath;
and step seven, stopping circulating after the experiment is operated for one period, removing the liquid in the experiment box (7) and the pipeline, taking out each test piece (6), putting into a drying box for drying and weighing, observing the scaling form under a microscope, recording the analysis, and obtaining the rule of the influence of the temperature and the flow rate on the electromagnetic wax control effect.
5. The method for the universal dynamic test in the electromagnetic paraffin control chamber of the oil well according to claim 4 is characterized in that: in the second step, the lead at the output end of the variable-frequency electromagnetic excitation source (3) is wound on the inductor (4) for 30 circles.
6. The method for the universal dynamic test in the electromagnetic paraffin control chamber of the oil well according to claim 4 is characterized in that: in the seventh step, one period is 7 days or 15 days.
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