CN114994288B - Comprehensive experiment system for preventing and controlling hydrate formation of oil and gas pipeline - Google Patents
Comprehensive experiment system for preventing and controlling hydrate formation of oil and gas pipeline Download PDFInfo
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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Abstract
The invention discloses a comprehensive experiment system for preventing and controlling the generation of hydrate of an oil and gas pipeline, which comprises a test pipeline, a ocean current simulation module for testing an oil and gas conveying mechanism, a pipeline bending module, a pipeline vibration module and a heating rectifying joint. The comprehensive experimental system for preventing and controlling the generation of the hydrate of the oil and gas pipeline, which adopts the technical scheme, can simulate the influence of single factors in pipeline bending, oil and gas temperature, oil and gas pressure, high-frequency vibration and ocean current on the generation of the hydrate, and simulate the comprehensive influence of multiple or all factors, so that the simulated environment is more similar to the real environment, and the obtained simulation result has extremely high application guidance value.
Description
Technical Field
The invention relates to the technical field of petroleum engineering, in particular to a comprehensive experiment system for preventing and controlling the generation of hydrate in an oil and gas pipeline.
Background
Hydrates, also known as hydrates, are compounds containing water in a fairly broad range, wherein the water may be linked to other moieties, such as hydrated metal ions, by coordination bonds, or may be covalently bound to other moieties, such as chloral. The hydrate is white crystal formed by certain components in oil gas and water molecules under certain temperature and pressure conditions, and has similar compact ice and snow appearance. Studies have shown that hydrates are a clathrate crystal envelope in which water molecules are hydrogen bonded to form clathrate crystals and gas molecules are enclosed in a lattice. The conditions for forming the hydrate are mainly as follows: the presence of liquid water, low temperature, high pressure, pressure fluctuations, changes in flow direction, etc. Among them, liquid water is a necessary condition for forming hydrate, and low temperature and high pressure are main conditions for forming hydrate.
At present, the prevention of hydrate blockage mainly comprises mechanical control, thermal control, injection thermodynamic inhibitor and injection kinetic inhibitor, and hydrate formation is not inhibited from the cause of hydrate except for thermal control. Accordingly, more and more institutions and oil and gas research units are beginning to try to inhibit hydrate formation based on simulation experiments.
However, the existing simulation experiment device has a very single function, and usually only two influencing factors generated by hydrates can be simulated at most, more influencing factors cannot be comprehensively simulated, and in fact, various influencing factors generated by the hydrates are likely to influence each other, so that simulation experiment results are likely to have no strong guiding significance.
Solving the above problems is urgent.
Disclosure of Invention
In order to solve the technical problems, the invention provides a comprehensive experiment system for preventing and controlling the generation of hydrate of an oil and gas pipeline.
The technical scheme is as follows:
a comprehensive experiment system for preventing and treating oil gas pipeline hydrate formation, including test pipeline and test oil gas conveying mechanism, its main points lie in: the test pipeline is made of a bendable metal pipeline, the test pipeline is located in a marine environment box, the marine environment box is provided with an experiment water tank containing seawater, an ocean current simulation module for simulating ocean currents, a pipeline bending module for driving the test pipeline to bend, a pipeline vibration module for driving the test pipeline to vibrate at high frequency and a heating rectifying joint arranged at an inlet of the test pipeline are arranged in the experiment water tank, and crude oil or natural gas sent by the test oil gas conveying mechanism is conveyed to the test pipeline after being heated and rectified by the heating rectifying joint.
As preferable: the ocean current simulation module comprises an electromagnetic plate arranged at the bottom of the experimental water tank, at least one group of water outlets and water return openings oppositely arranged on the wall of the experimental water tank and a plurality of electromagnetic anchors arranged on the test pipeline along the length direction, a water pump for enabling the water return openings to absorb water inwards and the water outlets to gush water outwards is arranged at the bottom of the ocean environment box, the test pipeline is positioned between each group of water outlets and the water return openings, the upper ends of the electromagnetic anchors are connected with the test pipeline, the lower ends of the electromagnetic anchors are provided with anchor seats capable of being adsorbed by the electrified electromagnetic plates, when the test pipeline is arranged on sea mud according to the set position and the gesture, the anchor seats can downwards penetrate through the sea mud, and at the moment, the electromagnetic plates are electrified to enable the electromagnetic plates to adsorb the anchor seats.
By adopting the structure, the experimental water tank can accurately reproduce the sea and seabed environment after containing the seawater and the sea mud, the electromagnetic anchor and the electromagnetic plate are matched, the test pipeline can be very flexibly anchored as required, the anchoring state of the oil and gas pipeline on the seabed is truly reproduced, and then the water outlet and the water return port are matched, so that the seawater in the experimental water tank can simulate the flowing state of ocean current at the sea, and the influence of ocean current change and pipeline position change on hydrate generation can be more truly simulated.
As preferable: the electromagnetic anchors comprise electromagnetic anchor mounting rings rotatably and movably sleeved on the test pipeline, and each electromagnetic anchor mounting ring is connected with a corresponding anchor seat through a chain.
By adopting the structure, the electromagnetic anchor is simple and reliable, easy to manufacture and capable of flexibly adjusting the connection position of the electromagnetic anchor and the test pipeline as required.
As preferable: the experimental water tank is of a cuboid groove-shaped structure, the test pipeline is arranged along the length direction of the experimental water tank, two groups of water outlets and water return ports which are opposite to each other are formed in the groove walls on two opposite sides of the long side of the experimental water tank, a group of water outlets and water return ports which are opposite to each other are formed in the groove walls on two opposite sides of the short side of the experimental water tank, three ocean current rectifying mechanisms which are respectively adjacent to corresponding water outlets are arranged at the groove bottom of the experimental water tank, and each ocean current rectifying mechanism comprises an ocean current rectifying plate and one-dimensional linear module used for driving the ocean current rectifying plate to be close to or far away from the adjacent water outlets.
By adopting the structure, the device is simple and reliable, has high adjustment precision, and can simulate the influence of the position change of the ocean current rectifying plate on the generation of the hydrate of the pipeline.
As preferable: the pipeline bending module comprises a horizontal bending mechanism and a vertical bending mechanism, wherein the horizontal bending mechanism and the vertical bending mechanism are arranged beside a test pipeline, the two sides of the horizontal bending mechanism are respectively provided with a first supporting mechanism which is supported on the test pipeline, the horizontal bending mechanism can drive the test pipeline between the two first supporting mechanisms to bend along the horizontal direction, the two sides of the vertical bending mechanism are respectively provided with a second supporting mechanism which is supported on the test pipeline, and the vertical bending mechanism can drive the test pipeline between the two second supporting mechanisms to bend along the vertical direction.
By adopting the structure, the test pipeline is made of the bendable metal pipeline, the bending change of the test pipeline can be truly simulated by matching the horizontal bending mechanism and the vertical bending mechanism, and particularly the inner wall structure of the bent part is completely consistent with that of the real oil-gas pipeline, so that the influence of the pipeline bending change on hydrate generation in the marine environment can be more truly simulated.
As preferable: the horizontal bending mechanism comprises a horizontal bending driving arm and a first three-dimensional linear module used for three-dimensionally adjusting the horizontal bending driving arm, one end of the horizontal bending driving arm is fixedly connected with a first driving bracket of the first three-dimensional linear module, the other end of the horizontal bending driving arm is provided with a first semicircular ring matched with the test pipeline, and a notch of the first semicircular ring faces to the vertical direction;
the first supporting mechanism comprises a horizontal supporting arm and a second three-dimensional linear module used for three-dimensionally adjusting the horizontal supporting arm, one end of the horizontal supporting arm is fixedly connected with a second driving bracket of the second three-dimensional linear module, the other end of the horizontal supporting arm is provided with a second semicircular ring matched with the test pipeline, a notch of the second semicircular ring faces to a vertical direction opposite to the first semicircular ring, and the first semicircular ring is positioned between the two second semicircular rings;
The vertical bending mechanism comprises a vertical bending driving arm and a third three-dimensional linear module used for three-dimensionally adjusting the vertical bending driving arm, one end of the vertical bending driving arm is fixedly connected with a third driving bracket of the third three-dimensional linear module, the other end of the vertical bending driving arm is provided with a third semicircular ring matched with the test pipeline, and a notch of the third semicircular ring faces to the horizontal direction;
the second supporting mechanism comprises a vertical supporting arm and a fourth three-dimensional linear module used for three-dimensionally adjusting the vertical supporting arm, one end of the vertical supporting arm is fixedly connected with a fourth driving bracket of the fourth three-dimensional linear module, the other end of the vertical supporting arm is provided with a fourth semicircular ring matched with the test pipeline, a notch of the fourth semicircular ring faces to the vertical direction opposite to the third semicircular ring, and the third semicircular ring is located between the two fourth semicircular rings.
By adopting the structure, the three-dimensional adjustment can be performed on the first semicircular ring, the second semicircular ring, the third semicircular ring and the fourth semicircular ring, so that the three-dimensional adjustment device is suitable for test pipelines with various different heights and postures, and is high in control precision and quick in response.
As preferable: the pipeline vibration module comprises a horizontal elbow vibration ring and a vertical elbow vibration ring which are both arranged on the test pipeline, wherein the horizontal elbow vibration ring is positioned at the outer side of a first supporting mechanism close to the heating rectifying joint, and the vertical elbow vibration ring is positioned at the outer side of a second supporting mechanism close to the heating rectifying joint.
By adopting the structure, the effect of blocking removal or generation inhibition of the hydrate at the bending part of the test pipeline by high-frequency vibration can be obtained through simulation test.
As preferable: the heating rectifying connector comprises an outer cylinder coaxially arranged at an inlet of the test pipeline and an inner core arranged in the outer cylinder, wherein the inner core comprises a rectifying sheet coaxially arranged with the outer cylinder, a heating element is further arranged in the inner core, the rectifying sheet is a heat conducting sheet contacted with the heating element, and the heating element is provided with a power line penetrating out of the outer cylinder along the radial direction.
By adopting the structure, the internal rectifying piece can rectify the flowing fluid, so that the flowing fluid is converted into laminar flow from turbulent flow as much as possible, the flowing fluid has a more stable flowing state, the flowing fluid is favorable for long-distance transportation of gas and liquid, and meanwhile, the flowing gas and liquid can be heated to rise to the critical temperature generated by hydrate under the flowing pressure, so that the temperature and the inhibition effect of rectification on the generation of the hydrate are obtained through simulation test.
As preferable: the inner core activity sets up in the urceolus, and the central point of this inner core puts and has the cavity along its axial extension, heating element is located the cavity, the cavity both ends have set firmly the end cap, urceolus both ends all have the adapter with its screw-thread fit, the inner of adapter all with the corresponding end screw-thread fit of inner core, the outer end of an adapter that is close to test pipeline and test pipeline screw-thread fit, the outer end of an adapter that keeps away from test pipeline has internal thread or external screw thread.
By adopting the structure, the installation mode of propping the inner core tightly by the adapter is beneficial to reducing the processing and installation difficulty, and simultaneously is convenient to be quickly installed on the corresponding pipelines of the test pipeline and the test oil gas conveying mechanism, thereby greatly improving the field practicability of the test pipeline; and moreover, the cavity arranged at the axle center and the heating element arranged in the cavity are utilized, so that the balance of the inner core structure is ensured, and meanwhile, the heating element can better transfer heat to each rectifying sheet.
As preferable: the test oil gas conveying mechanism comprises an air inlet branch, an oil inlet gas pipeline, an oil outlet gas pipeline, an air outlet branch, an oil outlet branch and a middle long pipeline, wherein the air inlet branch is provided with a booster fan and a first electric ball valve for controlling the on-off of the air inlet branch, the oil inlet branch is provided with a booster pump and a first electromagnetic valve for controlling the on-off of the oil inlet branch, the air outlet branch is provided with a second electric ball valve for controlling the on-off of the air outlet branch, and the oil outlet branch is provided with a second electromagnetic valve for controlling the on-off of the air outlet branch;
the inlet of the oil inlet pipeline is simultaneously communicated with the outlet of the air inlet branch pipeline and the outlet of the oil inlet branch pipeline, the outlet of the oil gas pipeline is communicated with the inlet of the test pipeline, the outlet of the test pipeline is communicated with the inlet of the oil outlet pipeline, the outlet of the oil outlet pipeline is simultaneously communicated with the inlet of the air outlet branch pipeline and the inlet of the oil outlet branch pipeline, the inlet of the middle long pipeline is simultaneously communicated with the outlet of the air outlet branch pipeline and the outlet of the oil outlet branch pipeline, and the outlet of the middle long pipeline is simultaneously communicated with the inlet of the air inlet branch pipeline and the inlet of the oil inlet branch pipeline, so that the air inlet branch pipeline, the oil inlet pipeline, the test pipeline, the oil outlet pipeline, the air outlet branch pipeline and the middle long pipeline can be sequentially and circularly communicated to form a natural gas circulation loop, and the oil inlet branch pipeline, the test pipeline, the oil outlet branch pipeline and the middle long pipeline can be sequentially and circularly communicated to form a crude oil circulation loop;
The air inlet branch is communicated with the compressed natural gas storage bottle through an air supplementing pipeline, a third electric ball valve for controlling the on-off of the air supplementing pipeline is arranged on the air supplementing pipeline, the oil inlet branch is communicated with the pressurized crude oil storage tank through an oil supplementing pipeline, a third electromagnetic valve for controlling the on-off of the oil supplementing pipeline is arranged on the oil supplementing pipeline, the air outlet branch is communicated with the natural gas recovery bottle through a first pressure relief pipeline, a fourth electric ball valve for controlling the on-off of the air outlet branch is arranged on the first pressure relief pipeline, the oil outlet branch is communicated with the crude oil recovery tank through a second pressure relief pipeline, and a fourth electromagnetic valve for controlling the on-off of the oil outlet branch is arranged on the second pressure relief pipeline;
the oil inlet pipeline is provided with a first pressure sensor and a first temperature sensor, the oil outlet pipeline is provided with a second temperature sensor, the air inlet branch is provided with a second pressure sensor, and the oil inlet branch is provided with a third pressure sensor.
By adopting the structure, the state of oil gas conveying can be truly simulated through the natural gas circulation loop and the crude oil circulation loop, the experimental cost can be effectively reduced through cyclic use, and meanwhile, the pressure of the natural gas circulation loop and the crude oil circulation loop can be flexibly regulated according to actual requirements by utilizing the compressed natural gas storage bottle, the natural gas recovery bottle, the pressurized crude oil storage tank and the crude oil recovery tank.
Compared with the prior art, the invention has the beneficial effects that:
the comprehensive experimental system for preventing and controlling the generation of the hydrate of the oil and gas pipeline, which adopts the technical scheme, can simulate the influence of single factors in pipeline bending, oil and gas temperature, oil and gas pressure, high-frequency vibration and ocean current on the generation of the hydrate, and simulate the comprehensive influence of multiple or all factors, so that the simulated environment is more similar to the real environment, and the obtained simulation result has extremely high application guidance value.
Drawings
FIG. 1 is a schematic diagram of a comprehensive experiment system;
FIG. 2 is a schematic view of the marine environment tank from one view;
FIG. 3 is a schematic view of a marine environmental tank from another perspective;
FIG. 4 is a schematic view of the structure of the horizontal bending mechanism;
FIG. 5 is a schematic view of the first support mechanism;
FIG. 6 is a schematic view of a vertical bending mechanism;
FIG. 7 is a schematic view of a second support mechanism;
FIG. 8 is a schematic diagram of a ocean current rectifying mechanism;
FIG. 9 is a cross-sectional view of a ocean current rectifying plate;
FIG. 10 is a schematic structural view of an electromagnetic anchor;
FIG. 11 is a perspective view of a heated rectifying joint;
FIG. 12 is an exploded view of a heated rectifying joint;
FIG. 13 is a cross-sectional view of a heated rectifying joint;
FIG. 14 is a schematic diagram of one of the distributions of the fairings;
fig. 15 is another distribution diagram of the rectifying sheet.
Detailed Description
The invention is further described below with reference to examples and figures.
As shown in fig. 1-3, a comprehensive experiment system for preventing and controlling hydrate formation of an oil and gas pipeline mainly comprises a test pipeline 2, a test oil and gas conveying mechanism ocean current simulation module, a pipeline bending module, a pipeline vibration module and a heating rectifying joint.
In this embodiment, the test tube 2 is made of a bendable metal tube, preferably 316L stainless steel, which is not only easy to bend, but also has strong pressure resistance and corrosion resistance, and is particularly suitable for use in a seawater environment. The test oil and gas delivery mechanism is used to deliver crude oil or natural gas to the test pipeline 2. The ocean current simulation module is used for simulating ocean currents, so that the influence of ocean current changes on the generation of hydrates of the test pipeline 2 can be tested. The pipe bending module is used for driving the test pipe 2 to bend, so that the influence of the change of the bending degree of the test pipe on the generation of hydrate of the test pipe 2 can be tested. The pipeline vibration module is used for driving the test pipeline 2 to vibrate at high frequency, so that the influence of the pipeline vibration at high frequency on the generation of hydrate of the test pipeline 2 or the evaluation of the blocking removal effect of the test pipeline 2 can be tested. It should be noted that the test pipeline 2 is located in the marine environment box 1, the ocean current simulation module, the pipeline bending module and the pipeline vibration module are all installed in the marine environment box 1, and the heating rectifying joint is installed at the inlet of the test pipeline 2, so that crude oil or natural gas sent by the test oil gas conveying mechanism is conveyed to the test pipeline 2 after being heated and rectified by the heating rectifying joint.
Referring to fig. 2 and 3, the ocean current simulation module includes an ocean current simulation module including an electromagnetic plate 1a1 disposed at a bottom of an experiment water tank 1a, at least one set of water outlets 1b and water return ports 1c disposed on a wall of the experiment water tank 1a oppositely, and a plurality of electromagnetic anchors 3 disposed on the test pipeline 2 along a length direction. The experiment water tank 1a contains seawater (not shown).
The bottom plate of the experiment water tank 1a is an electromagnetic plate 1a1, an iron core is arranged in the electromagnetic plate 1a1, a conductive winding is wound outside the iron core, the iron core is magnetized by the magnetic field of the conductive winding after being electrified, and the magnetized iron core also becomes a magnet. The electromagnetic plate 1a1 is piled with sea mud (not shown in the figure) for simulating a seabed, and the integral piling structure of the sea mud can be adjusted according to actual demands, so that the flexibility is extremely high.
The upper end of each electromagnetic anchor 3 is connected with the test pipeline 2, the lower end of each electromagnetic anchor 3 is provided with an anchor seat 3a which can be adsorbed by the electrified electromagnetic plate 1a1, when the test pipeline 2 is placed on sea mud according to the set position and the set gesture, each anchor seat 3a can downwards penetrate through the sea mud, at the moment, the electromagnetic plate 1a1 is electrified, so that each anchor seat 3a is adsorbed by the electromagnetic plate 1a1, and the anchoring state of the existing oil and gas pipeline on the real seabed can be simulated.
In order to simulate the influence of ocean current change on the generation of hydrate of the test pipeline 2, the wall of the experiment water tank 1a is provided with at least one group of water outlets 1b and water return inlets 1c which are arranged oppositely, and the test pipeline 2 is positioned between each water outlet 1b and each water return inlet 1c, so that the influence of ocean current on the test pipeline 2 can be reproduced by matching with the electromagnetic anchor 3. It should be noted that, the bottom of the marine environment tank 1 is provided with a water pump for making the water return port 1c absorb water inwards and the water outlet 1b gush water outwards, and the water outlet speed of each water outlet 1b can be adjusted by adjusting the flow rate of the water pump, so as to control the speed of ocean current.
Referring to fig. 2, 3, 8 and 9, in this embodiment, the experiment water tank 1a is in a rectangular tank structure, the test pipeline 2 is arranged along the length direction of the experiment water tank 1a, two sets of water outlets 1b and water return ports 1c opposite to each other are provided on two opposite side tank walls of the long side of the experiment water tank 1a, a set of water outlets 1b and water return ports 1c opposite to each other are provided on two opposite side tank walls of the short side of the experiment water tank 1a, three ocean current rectifying mechanisms 8 respectively adjacent to the corresponding water outlets 1b are provided at the tank bottom of the experiment water tank 1a, and the ocean current rectifying mechanisms 8 comprise ocean current rectifying plates 8a and one-dimensional linear modules 8b for driving the ocean current rectifying plates 8a to approach or separate from the adjacent water outlets 1 b. The influence of the position change of the ocean current rectifying plate 8a on the generation of the hydrate of the test pipeline 2 can be simulated by adjusting the distance between the ocean current rectifying plate 8a and the corresponding water outlet 1b through the one-dimensional linear module 8b. The one-dimensional linear module 8b comprises two parallel linear sliding tables, two ends of the ocean current rectifying plate 8a are respectively arranged on the linear sliding tables, a servo motor is arranged on one linear sliding table, a motor shaft of the servo motor is a long motor shaft, the long motor shaft drives the corresponding linear sliding tables through two reducers respectively, and therefore the position of the ocean current rectifying plate 8a is adjusted, and the ocean current rectifying plate is stable, reliable and not easy to be influenced by water flow impact.
Further, each group of water outlets 1b is composed of water outlet small holes 1b1 distributed in an array along the horizontal direction, and each group of water return openings 1c is composed of water return small holes 1c1 distributed in an array along the horizontal direction, so that water is more uniform, and the submarine ocean current effect can be truly simulated.
Further, the ocean current rectifying plates 8a are provided with rectifying modules distributed in an array along the horizontal direction, each rectifying module is composed of strip-shaped rectifying holes 8a1 which are arranged side by side from top to bottom, each strip-shaped rectifying hole 8a1 is inclined downwards in an inclined mode in a direction away from the adjacent water outlet 1b, the inclined strip-shaped rectifying holes 8a1 can reduce the shaking influence of ocean currents on the test pipeline 2 better, the stability of anchoring installation of the test pipeline 2 is improved, and therefore generation of hydrates can be restrained.
Referring to fig. 2, 3 and 10, the electromagnetic anchor 3 includes an electromagnetic anchor mounting ring 3b rotatably sleeved on the test pipeline 2, and the electromagnetic anchor mounting ring 3b can move along the axial direction of the test pipeline 2, and each electromagnetic anchor mounting ring 3b is connected with a corresponding anchor seat 3a through a chain 3c, so that the electromagnetic anchor is simple and reliable, easy to manufacture, and capable of flexibly adjusting the connection position of the electromagnetic anchor 3 and the test pipeline 2 as required, and truly simulates anchoring installation of an oil and gas pipeline on the seabed.
Among them, the anchor mount 3a is preferably made of ferritic stainless steel, for example, 430 stainless steel, which is not only strong in seawater corrosion resistance and less prone to rust, and can be used for a long time, but also can be reliably adsorbed by the electromagnetic plate 1a1 after being energized.
Further, at least two circles of first balls 3d uniformly distributed along the circumferential direction are mounted on the inner wall of the electromagnetic anchor mounting ring 3b in a rolling manner. The traditional sliding friction is optimized into rolling friction, so that friction force is greatly reduced, and the problems of clamping stagnation and the like when the electromagnetic anchor mounting ring 3b rotates or moves are avoided.
Referring to fig. 2-7, the pipe bending module includes a horizontal bending mechanism 4 and a vertical bending mechanism 6 disposed beside the test pipe 2.
Referring to fig. 2, 3, 6 and 7, the two sides of the horizontal bending mechanism 4 are respectively provided with a first supporting mechanism 5 supported on the test pipeline 2, and the horizontal bending mechanism 4 can drive the test pipeline 2 between the two first supporting mechanisms 5 to bend along the horizontal direction, so that the test pipeline is stable and reliable.
Specifically, the horizontal bending mechanism 4 includes a horizontal bending driving arm 4a and a first three-dimensional linear module 4b for three-dimensionally adjusting the horizontal bending driving arm 4a, that is, the horizontal bending driving arm 4a can be driven by the first three-dimensional linear module 4b to perform position adjustment in three-dimensional space so as to adapt to test pipes 2 with different heights and positions. Similarly, the first support mechanism 5 includes a horizontal support arm 5a and a second three-dimensional linear module 5b for three-dimensionally adjusting the horizontal support arm 5 a. Namely, the horizontal supporting arm 5a can be driven by the second three-dimensional linear module 5b to adjust the position in the three-dimensional space so as to adapt to the test pipelines 2 with different heights and positions.
And, one end of the horizontal bending driving arm 4a is fixedly connected with a first driving bracket 4b1 of the first three-dimensional linear module 4b, and the other end is provided with a first semicircular ring 4a1 matched with the test pipeline 2, and a notch of the first semicircular ring 4a1 faces to the vertical direction. Meanwhile, one end of the horizontal supporting arm 5a is fixedly connected with a second driving bracket 5b1 of the second three-dimensional linear module 5b, the other end of the horizontal supporting arm is provided with a second semicircular ring 5a1 matched with the test pipeline 2, a notch of the second semicircular ring 5a1 faces to a vertical direction opposite to the first semicircular ring 4a1, and the first semicircular ring 4a1 is positioned between the two second semicircular rings 5a 1. Therefore, the first semicircular ring 4a1 and the second semicircular ring 5a1 clamp the test tube 2 from two opposite directions, and are stable and reliable, and since the notches of the first semicircular ring 4a1 and the second semicircular ring 5a1 are both oriented in the vertical direction, the test tube 2 can be bent back and forth in two horizontal directions.
Specifically, firstly, two second semicircular rings 5a1 are supported at two ends of a section of the test pipeline 2 to be bent under the drive of corresponding second three-dimensional linear modules 5 b; after the completion, the first semicircular ring 4a1 is driven by the first three-dimensional linear module 4b to push the middle position of the required bending section of the test pipeline 2 along the horizontal direction until the bending degree reaches the set value.
Further, at least two rows of second balls 4a2 uniformly distributed along the radian direction are installed on the inner wall of the first semicircular ring 4a1 in a rolling manner, at least two rows of third balls 5a2 uniformly distributed along the radian direction are installed on the inner wall of the second semicircular ring 5a1 in a rolling manner, the positions of the first semicircular ring 4a1 and the second semicircular ring 5a1 on the test pipeline 2 can be flexibly adjusted through the rolling fit of the second balls 4a2 and the third balls 5a2 and the test pipeline 2, the traditional sliding friction is optimized to be rolling friction, the friction force is greatly reduced, and the problems of clamping stagnation and the like when the first semicircular ring 4a1 and the second semicircular ring 5a1 rotate or move are avoided.
Referring to fig. 2-5, two sides of the vertical bending mechanism 6 are respectively provided with a second supporting mechanism 7 supported on the test pipeline 2, and the vertical bending mechanism 6 can drive the test pipeline 2 between the two second supporting mechanisms 7 to bend along the vertical direction, so that the test pipeline is stable and reliable.
Specifically, the vertical bending mechanism 6 includes a vertical bending driving arm 6a and a third three-dimensional linear module 6b for three-dimensionally adjusting the vertical bending driving arm 6a, that is, the vertical bending driving arm 6a can be driven by the third three-dimensional linear module 6b to perform position adjustment in three-dimensional space so as to adapt to test pipes 2 with different heights and positions. Similarly, the second supporting mechanism 7 includes a vertical supporting arm 7a and a fourth three-dimensional linear module 7b for three-dimensionally adjusting the vertical supporting arm 7a, that is, the vertical supporting arm 7a can be driven by the fourth three-dimensional linear module 7b to perform position adjustment in three-dimensional space so as to adapt to test pipelines 2 with different heights and positions.
And, one end of the vertical bending driving arm 6a is fixedly connected with a third driving bracket 6b1 of a third three-dimensional linear module 6b, and the other end is provided with a third semicircular ring 6a1 matched with the test pipeline 2, and a notch of the third semicircular ring 6a1 faces to the horizontal direction. Meanwhile, one end of the vertical supporting arm 7a is fixedly connected with a fourth driving bracket 7b1 of the fourth three-dimensional linear module 7b, the other end of the vertical supporting arm is provided with a fourth semicircular ring 7a1 matched with the test pipeline 2, a notch of the fourth semicircular ring 7a1 faces to the vertical direction opposite to the third semicircular ring 6a1, and the third semicircular ring 6a1 is positioned between the two fourth semicircular rings 7a 1. Therefore, the third semicircular ring 6a1 and the fourth semicircular ring 7a1 clamp the test tube 2 from two opposite directions, and are stable and reliable, and since the notches of the third semicircular ring 6a1 and the fourth semicircular ring 7a1 are both oriented in the horizontal direction, the test tube 2 can be bent back and forth in two vertical directions.
Specifically, firstly, two fourth semicircular rings 7a1 are supported at two ends of a section of the test pipeline 2 to be bent under the drive of corresponding fourth three-dimensional linear modules 7 b; after the completion, the third semicircular ring 6a1 is driven by the third three-dimensional linear module 6b to vertically push against the middle position of the required bending section of the test pipeline 2 until the bending degree reaches the set value.
Further, at least two rows of fourth balls 6a2 uniformly distributed along the radian direction are arranged on the inner wall of the third semicircular ring 6a1 in a rolling manner, at least two rows of fifth balls 7a2 uniformly distributed along the radian direction are arranged on the inner wall of the fourth semicircular ring 7a1 in a rolling manner, the positions of the third semicircular ring 6a1 and the fourth semicircular ring 7a1 on the test pipeline 2 can be flexibly adjusted through rolling fit of the fourth balls 6a2 and the fifth balls 7a2 and the test pipeline 2, the traditional sliding friction is optimized to be rolling friction, friction force is greatly reduced, and the problems of clamping stagnation and the like when the third semicircular ring 6a1 and the fourth semicircular ring 7a1 rotate or move are avoided.
Referring to fig. 4-7, the first three-dimensional linear module 4b, the second three-dimensional linear module 5b, the third three-dimensional linear module 6b and the fourth three-dimensional linear module 7b have the same structure, and each of the three-dimensional linear module base, the x-direction linear module installed on the three-dimensional module base, the y-direction linear module installed on the x-direction linear module sliding table and the z-direction linear module installed on the y-direction linear module is composed of a three-dimensional module base, and the x-direction linear module, the y-direction linear module and the z-direction linear module are driven by adopting a servo motor in cooperation with a belt assembly, so that the adjustment precision is high.
Referring to fig. 2 and 3, the pipe vibration module includes a horizontal elbow vibration ring 34 and a vertical elbow vibration ring 35, both of which are mounted on the test pipe 2. The horizontal elbow vibration ring 34 is positioned at the outer side of one first supporting mechanism 5 close to the heating rectifying joint, the vertical elbow vibration ring 35 is positioned at the outer side of one second supporting mechanism 7 close to the heating rectifying joint, and the effect of blocking removal or generation inhibition of hydrate at the horizontal bending position and the vertical bending position of the test pipeline 2 by high-frequency vibration can be obtained through simulation test by arranging the horizontal elbow vibration ring 34 and the vertical elbow vibration ring 35. The unblocking effect refers to whether the hydrate can be unblocked by the simulation test through the horizontal elbow vibration ring 34 or the vertical elbow vibration ring 35 when serious hydrate blocking occurs at the horizontal bending position or the vertical bending position of the test pipeline 2. The suppression of the generation refers to whether or not the test vibration is effective in suppressing the generation of hydrate at the horizontal bend or the vertical bend of the test pipe 2.
Referring to fig. 1-3 and fig. 11-15, the heating rectifying connector includes an outer cylinder 36 and an inner core 37 disposed in the outer cylinder 36, the inner core 37 mainly includes a rectifying piece 37a disposed along an axial direction of the outer cylinder 36, a heat generating element 37b is disposed in the inner core 37, the rectifying piece 37a is a heat conducting piece contacting with the heat generating element 37b, the heat generating element 37b has a power line 37c penetrating to the outside of the outer cylinder 36, and the heat generating element 37b can work to generate heat and transfer heat to all the rectifying pieces 37a through the power line 37c connected to an external power source.
The inner core 37 is movably arranged in the outer cylinder 36, two ends of the outer cylinder 36 are respectively provided with an adapter 38 in threaded fit with the inner core, the inner end of the adapter 38 abuts against the corresponding end part of the inner core 37, and the outer end of the adapter 38 is provided with an internal thread or an external thread. Specifically, the outer end of one adapter 38 adjacent to the test tube 2 is threadedly engaged with the test tube 2, and the outer end of one adapter 38 remote from the test tube 2 has internal or external threads. Through such design, utilize adapter 38 to support tight mounting means of inner core 37, be favorable to reducing processing and installation degree of difficulty, be convenient for simultaneously install to test pipeline 2 and test oil gas conveying mechanism's corresponding pipeline fast on, improve its field utility greatly, still be convenient for the later stage simultaneously and change, and reduce the installation degree of difficulty.
The inner core 37 comprises an inner cylinder 37d, the inner cylinder 37d and the outer cylinder 36 are both cylindrical with two open ends, the outer diameters of the two ends of the inner cylinder 37d are matched with the inner diameter of the outer cylinder 36, the outer diameter of the middle part of the inner cylinder 37d is smaller than the inner diameter of the outer cylinder 36, and a power wire 37c penetrates through the outer cylinder 36 after penetrating out from the middle part of the inner cylinder 37d, so that the inner core 37 is quickly and fixedly arranged in the outer cylinder 36, the two ends of the inner core are preliminarily plugged, a gap between the inner cylinder 37d and the middle part of the outer cylinder 36 is favorable for forming a heat insulation space, and the influence of external environment temperature is reduced.
The rectifying plates 37a are uniformly distributed in the inner cylinder 37d, the middle part of the inner cylinder 37d is provided with a cavity 37f arranged along the axis of the inner cylinder 37d, the rectifying plates 37a are distributed on the circumferential outer side of the cavity 37f, two embodiments of the distributing structure of the rectifying plates 37a are provided, the rectifying plates 37a are distributed in an annular array along the circumferential direction of the cavity 37f in fig. 14, the rectifying plates 37a are integrally distributed in a straight line array along the diameter direction of the inner cylinder 37d in fig. 15, and the rectifying plates can achieve a certain rectifying effect on fluid, wherein the structure shown in fig. 15 has a better rectifying effect on the gas, the fluid state of the structure tends to be laminar, the thickness of the rectifying plates 37a is about 5cm when the structure is practically implemented, the length is 0.3-0.5m, and the flow porosity in the inner cylinder 37d is 0.5-0.8.
The two ends of the chamber 37f are open, the heating element 37b is detachably arranged in the chamber 37f, plugs 37g are fixedly arranged at the two ends of the chamber 37f, a threaded fit mode can be adopted between the plugs 37g and the ends of the chamber 37f, as shown in fig. 14 and 15, because the rectifying sheets 37a are positioned on the circumferential outer side of the chamber 37f, and at least one rectifying sheet 37a is fixedly connected with the outer wall of the chamber 37f in implementation, the power wire 37c penetrates through any rectifying sheet 37a fixed with the outer wall of the chamber 37f and then stretches into the chamber 37f to be connected with the heating element 37b, and in implementation, the heating element 37b can be an electric heating rod, a resistor wire or a wire divider connected with a plurality of resistor wires, the resistor wires are directly embedded into the rectifying sheets 37a, the implementation is relatively more suitable for the distribution structure of the rectifying sheets 37a shown in fig. 15, and the resistor wires are embedded into the rectifying sheets 37a through the side wall of the inner barrel 37 d.
In order to improve the reliability of the joint, reduce the leakage risk and prolong the service life of the power line 37c, a sealing ring 37e is arranged between the two ends of the inner cylinder 37d and the outer cylinder 36, so that the annular space formed between the inner cylinder 37d and the outer cylinder 36 has better relative tightness, the influence of the environmental temperature can be further reduced, and the problem that the large surface contact between the inner cylinder and the outer cylinder causes inconvenient disassembly in the later period can be avoided.
Referring to fig. 1, the test oil gas conveying mechanism comprises an air inlet branch 9, an oil inlet branch 10, an oil inlet pipeline 11, an oil outlet pipeline 12, an air outlet branch 13, an oil outlet branch 14 and a middle long pipeline 15, wherein a booster fan 16 and a first electric ball valve 17 for controlling the on-off of the air inlet branch 9 are arranged on the air inlet branch 9, a booster pump 18 and a first electromagnetic valve 19 for controlling the on-off of the oil inlet branch 10 are arranged on the oil inlet branch 10, a second electric ball valve 20 for controlling the on-off of the air outlet branch 13 is arranged on the air outlet branch 13, and a second electromagnetic valve 21 for controlling the on-off of the air outlet branch 14 is arranged on the oil outlet branch 14.
The inlet of the oil-gas inlet pipeline 11 is simultaneously communicated with the outlet of the air inlet branch 9 and the outlet of the oil inlet branch 10, the outlet of the oil-gas pipeline 11 is communicated with the inlet of the test pipeline 2, the outlet of the test pipeline 2 is communicated with the inlet of the oil outlet pipeline 12, the outlet of the oil outlet pipeline 12 is simultaneously communicated with the inlet of the air outlet branch 13 and the inlet of the oil outlet branch 14, the inlet of the middle long pipeline 15 is simultaneously communicated with the outlet of the air outlet branch 13 and the outlet of the oil outlet branch 14, and the outlet of the middle long pipeline 15 is simultaneously communicated with the inlet of the air inlet branch 9 and the inlet of the oil inlet branch 10, so that the air inlet branch 9, the oil inlet pipeline 11, the test pipeline 2, the oil outlet pipeline 12, the air outlet branch 13 and the middle long pipeline 15 can be sequentially and circularly communicated to form a natural gas circulation loop, and the oil inlet branch 10, the oil inlet pipeline 11, the test pipeline 2, the oil outlet pipeline 12, the oil outlet branch 14 and the middle long pipeline 15 can be sequentially and circularly communicated to form a crude oil circulation loop.
The natural gas circulation loop and the crude oil circulation loop can truly simulate the oil gas conveying state, and the experiment cost can be effectively reduced through cyclic use.
The air inlet branch 9 is communicated with the compressed natural gas storage bottle 23 through an air supplementing pipeline 22, a third electric ball valve 24 for controlling the on-off of the air supplementing pipeline 22 is installed on the air supplementing pipeline 22, the oil inlet branch 10 is communicated with a pressurized crude oil storage tank 26 through an oil supplementing pipeline 25, a third electromagnetic valve 27 for controlling the on-off of the oil supplementing pipeline 25 is installed on the oil supplementing pipeline 25, the air outlet branch 13 is communicated with a natural gas recovery bottle 29 through a first pressure relief pipeline 28, a fourth electric ball valve 30 for controlling the on-off of the air outlet branch is installed on the first pressure relief pipeline 28, the oil outlet branch 14 is communicated with a crude oil recovery tank 32 through a second pressure relief pipeline 31, and a fourth electromagnetic valve 33 for controlling the on-off of the oil outlet branch is installed on the second pressure relief pipeline 31.
The pressure of the natural gas circulation loop and the crude oil circulation loop can be flexibly adjusted according to actual demands by utilizing the compressed natural gas storage bottle 23, the natural gas recovery bottle 29, the pressurized crude oil storage tank 26 and the crude oil recovery tank 32 and matching with the booster fan 16 or the booster pump 18, and the method is simple and reliable.
The oil inlet pipeline 11 is provided with a first pressure sensor P1 and a first temperature sensor T1, the oil outlet pipeline 12 is provided with a second temperature sensor T2, the air inlet branch 9 is provided with a second pressure sensor P2, and the oil inlet branch 10 is provided with a third pressure sensor P3. Through the design of the sensor, the change of temperature and pressure can be accurately detected, so that the generation condition of hydrate, namely the generation of the hydrate and the generation of the hydrate with or without the hydrate are reversed by utilizing an algorithm based on the pressure change, specifically, when the hydrate is generated in the upstream pipe wall of the oil and gas inlet pipeline 11, the pressure detected by the pressure sensor corresponding to the downstream is increased, the average inner diameter of the pipeline is calculated according to the pressure increment, and then the average inner diameter of the pipeline is compared with the original inner diameter of the pipeline, so that the current general thickness of the hydrate can be obtained.
Therefore, through the comprehensive experiment system, the influence of a single factor in pipeline bending, oil gas temperature, oil gas pressure, high-frequency vibration and ocean current on hydrate generation can be simulated, and the comprehensive influence of multiple or all factors can be simulated, so that the simulation environment is more similar to the real environment, and the obtained simulation result has extremely high application guidance value.
Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and that many similar changes can be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A comprehensive experiment system for preventing and treating oil gas pipeline hydrate formation, includes test pipeline (2) and test oil gas conveying mechanism, its characterized in that: the test pipeline (2) is made of a bendable metal pipeline, the test pipeline (2) is located in a marine environment box (1), the marine environment box (1) is provided with an experiment water tank (1 a) containing seawater, an ocean current simulation module for simulating ocean currents, a pipeline bending module for driving the test pipeline (2) to bend, a pipeline vibration module for driving the test pipeline (2) to vibrate at high frequency and a heating rectifying joint arranged at an inlet of the test pipeline (2) are arranged in the experiment water tank (1 a), and crude oil or natural gas sent out by the test oil gas conveying mechanism is conveyed to the test pipeline (2) after being heated and rectified by the heating rectifying joint;
The pipeline vibration module comprises a horizontal bent pipe vibration ring (34) and a vertical bent pipe vibration ring (35) which are both arranged on the test pipeline (2), wherein the horizontal bent pipe vibration ring (34) is positioned at the outer side of a first supporting mechanism (5) close to the heating rectifying joint, and the vertical bent pipe vibration ring (35) is positioned at the outer side of a second supporting mechanism (7) close to the heating rectifying joint.
2. The integrated experimental system for controlling hydrate formation in oil and gas pipelines of claim 1, wherein: the ocean current simulation module comprises an electromagnetic plate (1 a 1) arranged at the bottom of an experiment water tank (1 a), at least one group of water outlets (1 b) and water return ports (1 c) which are oppositely arranged on the wall of the experiment water tank (1 a) and a plurality of electromagnetic anchors (3) which are arranged on a test pipeline (2) along the length direction, a water pump for enabling the water return ports (1 c) to absorb water inwards and the water outlets (1 b) to gush water outwards is arranged at the bottom of the ocean environment tank (1), the test pipeline (2) is positioned between each group of water outlets (1 b) and the water return ports (1 c), the upper ends of the electromagnetic anchors (3) are connected with the test pipeline (2), anchor seats (3 a) which can be adsorbed by the electrified electromagnetic plate (1 a 1) are arranged at the lower ends, when the test pipeline (2) is arranged on sea mud according to the set position and the gesture, the anchor seats (3 a) can downwards penetrate through sea mud, and the electromagnetic plate (1 a 1) is electrified at the moment, and the electromagnetic plate (1 a 1) adsorbs the anchor seats (3 a).
3. The integrated experimental system for controlling hydrate formation in oil and gas pipelines of claim 2, wherein: the electromagnetic anchors (3) comprise electromagnetic anchor mounting rings (3 b) rotatably and movably sleeved on the test pipeline (2), and each electromagnetic anchor mounting ring (3 b) is connected with a corresponding anchor seat (3 a) through a chain (3 c) respectively.
4. A comprehensive experiment system for preventing and controlling hydrate formation in oil and gas pipelines according to claim 2 or 3, characterized in that: the experiment water tank (1 a) is of a cuboid groove-shaped structure, the test pipeline (2) is arranged along the length direction of the experiment water tank (1 a), two groups of water outlets (1 b) and water return openings (1 c) which are opposite to each other are formed in groove walls on two opposite sides of the long side of the experiment water tank (1 a), a group of water outlets (1 b) and water return openings (1 c) which are opposite to each other are formed in groove walls on two opposite sides of the short side of the experiment water tank (1 a), three ocean current rectifying mechanisms (8) which are respectively adjacent to the corresponding water outlets (1 b) are arranged at the groove bottom of the experiment water tank (1 a), and the ocean current rectifying mechanisms (8) comprise ocean current rectifying plates (8 a) and one-dimensional linear modules (8 b) used for driving the ocean current rectifying plates (8 a) to be close to or far away from the adjacent water outlets (1 b).
5. The integrated experimental system for controlling hydrate formation in oil and gas pipelines of claim 1, wherein: the pipeline bending module comprises a horizontal bending mechanism (4) and a vertical bending mechanism (6) which are arranged beside the test pipeline (2), wherein first supporting mechanisms (5) which are supported on the test pipeline (2) are respectively arranged on two sides of the horizontal bending mechanism (4), the horizontal bending mechanism (4) can drive the test pipeline (2) between the two first supporting mechanisms (5) to bend along the horizontal direction, second supporting mechanisms (7) which are supported on the test pipeline (2) are respectively arranged on two sides of the vertical bending mechanism (6), and the vertical bending mechanism (6) can drive the test pipeline (2) between the two second supporting mechanisms (7) to bend along the vertical direction.
6. The integrated experimental system for controlling hydrate formation in oil and gas pipelines of claim 5, wherein: the horizontal bending mechanism (4) comprises a horizontal bending driving arm (4 a) and a first three-dimensional linear module (4 b) for three-dimensionally adjusting the horizontal bending driving arm (4 a), one end of the horizontal bending driving arm (4 a) is fixedly connected with a first driving bracket (4 b 1) of the first three-dimensional linear module (4 b), the other end of the horizontal bending driving arm is provided with a first semicircular ring (4 a 1) matched with the test pipeline (2), and a notch of the first semicircular ring (4 a 1) faces to the vertical direction;
The first supporting mechanism (5) comprises a horizontal supporting arm (5 a) and a second three-dimensional linear module (5 b) for three-dimensionally adjusting the horizontal supporting arm (5 a), one end of the horizontal supporting arm (5 a) is fixedly connected with a second driving bracket (5 b 1) of the second three-dimensional linear module (5 b), the other end of the horizontal supporting arm is provided with a second semicircular ring (5 a 1) matched with the test pipeline (2), a notch of the second semicircular ring (5 a 1) faces to a vertical direction opposite to the first semicircular ring (4 a 1), and the first semicircular ring (4 a 1) is positioned between the two second semicircular rings (5 a 1);
the vertical bending mechanism (6) comprises a vertical bending driving arm (6 a) and a third three-dimensional linear module (6 b) for three-dimensionally adjusting the vertical bending driving arm (6 a), one end of the vertical bending driving arm (6 a) is fixedly connected with a third driving bracket (6 b 1) of the third three-dimensional linear module (6 b), the other end of the vertical bending driving arm is provided with a third semicircular ring (6 a 1) matched with the test pipeline (2), and a notch of the third semicircular ring (6 a 1) faces to the horizontal direction;
the second supporting mechanism (7) comprises a vertical supporting arm (7 a) and a fourth three-dimensional linear module (7 b) for three-dimensionally adjusting the vertical supporting arm (7 a), one end of the vertical supporting arm (7 a) is fixedly connected with a fourth driving support (7 b 1) of the fourth three-dimensional linear module (7 b), the other end of the vertical supporting arm is provided with a fourth semicircular ring (7 a 1) matched with the test pipeline (2), a notch of the fourth semicircular ring (7 a 1) faces the vertical direction opposite to the third semicircular ring (6 a 1), and the third semicircular ring (6 a 1) is located between the two fourth semicircular rings (7 a 1).
7. The integrated experimental system for controlling hydrate formation in oil and gas pipelines of claim 1, wherein: the heating rectifying joint comprises an outer barrel (36) coaxially arranged at an inlet of the test pipeline (2) and an inner core (37) arranged in the outer barrel (36), the inner core (37) comprises a rectifying piece (37 a) coaxially arranged with the outer barrel (36), a heating element (37 b) is further arranged in the inner core (37), the rectifying piece (37 a) is a heat conducting piece contacted with the heating element (37 b), and the heating element (37 b) is provided with a power line (37 c) penetrating out of the outer barrel (36) along the radial direction.
8. The integrated experimental system for controlling hydrate formation in oil and gas pipelines of claim 7, wherein: the inner core (37) is movably arranged in the outer cylinder (36), a cavity (37 f) extending along the axial direction of the inner core (37) is arranged at the central position of the inner core (37), the heating element (37 b) is positioned in the cavity (37 f), plugs (37 g) are fixedly arranged at two ends of the cavity (37 f), adapter joints (38) in threaded fit with the two ends of the outer cylinder (36) are arranged at two ends of the outer cylinder (36), the inner ends of the adapter joints (38) are in threaded fit with the corresponding ends of the inner core (37), the outer end of one adapter joint (38) close to the test pipeline (2) is in threaded fit with the test pipeline (2), and the outer end of one adapter joint (38) far away from the test pipeline (2) is provided with internal threads or external threads.
9. The integrated experimental system for controlling hydrate formation in oil and gas pipelines of claim 1, wherein: the test oil gas conveying mechanism comprises an air inlet branch (9), an oil inlet branch (10), an oil inlet pipeline (11), an oil outlet pipeline (12), an air outlet branch (13), an oil outlet branch (14) and a middle long pipeline (15), wherein a booster fan (16) and a first electric ball valve (17) for controlling the on-off of the air inlet branch (9) are arranged on the air inlet branch (9), a booster pump (18) and a first electromagnetic valve (19) for controlling the on-off of the oil inlet branch (10) are arranged on the oil inlet branch (10), a second electric ball valve (20) for controlling the on-off of the air outlet branch is arranged on the air outlet branch (13), and a second electromagnetic valve (21) for controlling the on-off of the air outlet branch (14) is arranged on the oil outlet branch;
the inlet of the oil inlet pipeline (11) is simultaneously communicated with the outlet of the air inlet branch (9) and the outlet of the oil inlet branch (10), the outlet of the oil gas pipeline (11) is communicated with the inlet of the test pipeline (2), the outlet of the test pipeline (2) is communicated with the inlet of the oil outlet pipeline (12), the outlet of the oil outlet pipeline (12) is simultaneously communicated with the inlet of the air outlet branch (13) and the inlet of the oil outlet branch (14), the inlet of the middle long pipeline (15) is simultaneously communicated with the outlet of the air outlet branch (13) and the outlet of the oil outlet branch (14), and the outlet of the middle long pipeline (15) is simultaneously communicated with the inlet of the air inlet branch (9) and the inlet of the oil inlet branch (10), so that the air inlet branch (9), the oil inlet pipeline (11), the test pipeline (2), the oil outlet pipeline (12), the air outlet branch (13) and the middle long pipeline (15) can be sequentially and circularly communicated to form a natural gas circulation loop, and the oil inlet branch (10), the oil inlet pipeline (11), the test pipeline (2), the oil outlet pipeline (12) and the middle long pipeline (15) can be sequentially communicated with the middle long pipeline (15) to form a crude oil circulation loop;
The gas inlet branch (9) is communicated with the compressed natural gas storage bottle (23) through a gas supplementing pipeline (22), a third electric ball valve (24) for controlling the on-off of the gas supplementing pipeline (22) is installed on the gas supplementing pipeline (22), the oil inlet branch (10) is communicated with the pressurized crude oil storage tank (26) through a gas supplementing pipeline (25), a third electromagnetic valve (27) for controlling the on-off of the oil supplementing pipeline (25) is installed on the gas supplementing pipeline (25), the gas outlet branch (13) is communicated with the natural gas recovery bottle (29) through a first pressure releasing pipeline (28), a fourth electric ball valve (30) for controlling the on-off of the gas outlet branch is installed on the first pressure releasing pipeline (28), the oil outlet branch (14) is communicated with the crude oil recovery tank (32) through a second pressure releasing pipeline (31), and a fourth electromagnetic valve (33) for controlling the on-off of the oil outlet branch is installed on the second pressure releasing pipeline (31).
Install first pressure sensor (P1) and first temperature sensor (T1) on advance oil pipe way (11), install second temperature sensor (T2) on go out oil pipe way (12), install second pressure sensor (P2) on advance air branch way (9), install third pressure sensor (P3) on advance oil branch way (10).
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