Multifunctional paraffin control experimental device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SINOPEC OILFIELD SERVICE CORPORATION
- Filing Date
- 2025-06-12
- Publication Date
- 2026-06-19
Smart Images
Figure CN224383180U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of experimental equipment for evaluating the anti-wax effect inside oil and gas wellbores, and more specifically, to a multifunctional anti-wax experimental device. Background Technology
[0002] Waxing in wellbore is a common problem in oil well production. As waxy crude oil flows through the wellbore, decreasing temperature and pressure disrupt its dissolution balance, causing paraffin molecules to crystallize and deposit on the inner wall of the tubing. This narrows the wellbore flow path, reduces oil well production, and in severe cases, leads to tubing blockage and well shutdown. Understanding the patterns of wellbore waxing and its influencing factors, and implementing effective wax removal and prevention techniques, is crucial for ensuring continuous and efficient oil well production. Currently, the wax-preventing effect is tested according to the standard SY / T6300-2009 "Technical Conditions for Wax-Inhibiting Agents for Oil Production". However, when the oil sample is stirred by the paddle in the water bath, there are cases of insufficient stirring or oil splashing. The paddle stirring cannot simulate the actual oil movement state in the wellbore. When the water bath is heated, the ambient temperature of the entire wax-forming tube is uneven. It is difficult to continuously reduce the temperature to simulate the cooling operation in the wellbore. Furthermore, it is impossible to conduct experiments to analyze the influence of different oil-gas-water ratios, ambient temperatures, wax-forming tube materials, wax-forming tube sizes, or the addition of a certain amount of wax inhibitor. Therefore, the original equipment has defects in simulating the wax formation in the actual wellbore. Summary of the Invention
[0003] The technical problem to be solved by this utility model is to provide a multifunctional anti-wax experimental device, which can be used for the analysis of factors affecting wax formation and anti-wax experiments.
[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a multifunctional anti-wax test device, including a base, an outer cylinder, a limiting cylinder, a wax tube, a temperature sensor and a motor.
[0005] The wax-forming tube is placed inside the limiting cylinder, and the bottom end of the outer cylinder is fixed to the machine base. Multiple limiting cylinders are evenly spaced inside the outer cylinder. Each limiting cylinder is equipped with a temperature sensor and a heating coil. The temperature sensor is embedded in the inner wall of the limiting cylinder, and the heating coil is evenly arranged on the inner wall of the limiting cylinder. A rotating component is provided at the bottom of the limiting cylinder, and the motor is located inside the machine base below the rotating component. The drive shaft of the motor is fixedly connected to the rotating component.
[0006] In the above solution, the base is equipped with a control panel, which includes a display screen, selection buttons, confirmation buttons, setting up buttons, and setting down buttons.
[0007] In the above scheme, the base is equipped with a signal processor, which is electrically connected to the temperature sensor, the motor and the display screen.
[0008] In the above scheme, a buzzer is installed on the base.
[0009] In the above scheme, a cover plate is provided above the limiting cylinder, and the cover plate is pivotally connected to the top of the outer cylinder.
[0010] In the above scheme, the cover plate is a circular plastic component with an area slightly larger than the circular area of the top of the limiting cylinder. A groove is provided on the outer side of the limiting cylinder. An electromagnet and an iron block are respectively installed on the cover plate and the groove. During operation, the electromagnet is energized so that the cover plate and the groove are tightly joined.
[0011] In the above scheme, the bottom of the wax tube is evenly distributed with multiple downward-facing limiting grooves, and the limiting grooves are correspondingly set with the limiting posts on the rotating part.
[0012] In the above scheme, a top cover is provided above the wax-forming tube, and the top cover is threadedly sealed to the opening of the wax-forming tube.
[0013] The multifunctional anti-wax testing device of this utility model has the following beneficial effects:
[0014] 1. This utility model can conduct multiple experiments on wax deposition influencing factors and dynamic wax prevention in wellbore. By selecting wax deposition tubes with different inner diameters, experiments on the influence factors of wax deposition tube radius can be conducted. By using different oil-gas-water ratios, experiments on the influence factors of oil-gas-water ratios can be conducted. By setting different rotation programs, experiments on the influence factors under different production rates can be simulated. By setting temperature changes, wax deposition conditions can be simulated. By selecting wax deposition tubes of different materials, the optimal production tubing material can be selected. By adding different amounts of the same wax removal and prevention agent or different types of wax removal and prevention agents with optimal dosages, the long-term efficacy and economy of various wax removal and prevention agents can be evaluated.
[0015] 2. By clicking the program control button on the control panel, the signal processor processes the temperature sensor settings data, performs logical judgments, and completes relevant controls to achieve fully automatic heating, cooling, and variable speed rotation. The experimental progress can be monitored through the display screen and adjustments can be made at any time.
[0016] 3. The vertically arranged wax-forming tube, the temperature adjustment mode controlled by the signal processor, and the movement mode of the oil sample inside the tube are closer to the actual working conditions than the uniform stirring of the stirring rod.
[0017] 4. The sealing performance of this utility model is stronger than that of an open-design water bath heating and stirring device, and the ambient temperature of the entire wax tube is more uniform, avoiding experimental errors such as insufficient stirring or oil splashing.
[0018] 5. The multiple wax-forming tubes configured in this utility model can be made of different materials and have different inner diameters, and parallel experiments can be conducted, which shortens the experimental time. In addition, the structure is simple, the cost is low, and the operation is convenient. Attached Figure Description
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:
[0020] Figure 1 This is a schematic diagram of the structure of a multifunctional anti-wax experimental device;
[0021] Figure 2 This is a schematic diagram of the limiting cylinder and motor structure; Detailed Implementation
[0022] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0023] like Figure 1-2 As shown, the multifunctional anti-wax experimental device of this utility model includes a base 1, an outer cylinder 2, a limiting cylinder 3, a wax-forming tube 22, a temperature sensor 15, a motor 20, a signal processor 12, and a control panel 11.
[0024] Eight limiting cylinders 3 are evenly spaced inside the outer cylinder 2. Each limiting cylinder 3 independently houses a temperature sensor 15 and a heating coil 14. The temperature sensor 15 is embedded in the inner wall of the limiting cylinder 3, and the heating coils 14 are evenly distributed on the inner wall of the limiting cylinder. A rotating component 16 is located at the bottom of the limiting cylinder 3. A motor 20 is located inside the base 1 below the rotating component 16, and the drive shaft 19 of the motor 20 is connected to the rotating component 16 by screws. The bottom end of the outer cylinder 2 is fixed to the base 1. A control panel 11 is located on the front of the base 1, and a buzzer 13 is located on the right rear side.
[0025] Preferably, the control panel 11 includes a display screen 6, a selection button 7, a confirmation button 8, a setting up button 9, and a setting down button 10.
[0026] Preferably, the signal processor 12 is located in the center of the machine base 1 and is electrically connected to the temperature sensor 15, the motor 20 and the display screen 6. By clicking the program control button on the control panel 11, the signal processor processes the temperature sensor setting data, makes logical judgments and completes related controls to achieve fully automatic heating, cooling and variable speed rotation.
[0027] Preferably, the bottom of the wax tube 22 is evenly distributed with multiple downward-facing limiting grooves 17, and the limiting grooves 17 are correspondingly arranged with the limiting posts 18 on the rotating component 16.
[0028] Preferably, the wax-forming tubes 22 are placed inside the limiting cylinder 3, and a corresponding cover plate 4 is provided directly above each wax-forming tube. The cover plate 4 is a circular plastic component with an area slightly larger than the circular area of the top of the limiting cylinder. It is pivotally connected to the top of the outer cylinder 2 and can be fastened into the corresponding groove 5. An electromagnet and an iron block are respectively provided on the cover plate 4 and the groove 5. During operation, the electromagnet is energized, so that the cover plate 4 and the groove are tightly engaged, maintaining a stable ambient temperature inside the limiting cylinder.
[0029] Preferably, the wax-deposition tube 22 is available in various materials and inner diameters. Each set of wax-deposition tubes 22 has the same material, inner and outer diameters, and length, and can be used to simulate wax deposition under different wellbore conditions. A top cover 21 is provided on the top of the wax-deposition tube 22, and the top cover 21 is threadedly sealed to the opening of the wax-deposition tube 22.
[0030] The operating modes of this multifunctional anti-wax testing device include: Mode 1: The rotational speed rapidly increases from 0 to the set speed, then decreases from the set speed to 80% of the set speed within one minute, then returns to the set speed within one minute, and repeats the previous program after maintaining the set speed for one minute until the end; Mode 2: The rotational speed rapidly increases from 0 to the set speed, then decreases from the set speed to 80% of the set speed within half a minute, then returns to the set speed within half a minute, and repeats the previous program after maintaining the set speed for half a minute until the end; Mode 3: The rotational speed rapidly increases from 0 to the set speed, then decreases from the set speed to 60% of the set speed within half a minute, then returns to the set speed within half a minute, and repeats the previous program after maintaining the set speed for half a minute until the end; Mode 4: The rotational speed rapidly increases from 0 to the set speed, then decreases from the set speed to 60% of the set speed within one minute, then returns to the set speed within one minute, and repeats the previous program after maintaining the set speed for one minute until the end.
[0031] Example 1: Wax content experiment with different oil-water ratios
[0032] S1. Weigh the initial weights of the 8 wax tubes respectively, and record them as m1, m2, m3, m4, m5, m6, and m7.
[0033] S2. Add sufficient waxy crude oil with a water content of 60%, 70%, 75%, 80%, 85%, 90%, and 95% to the waxing tube, place it in the limiting cylinder, set the program on the control panel, heat it to the set temperature in the limiting cylinder of the outer cylinder, start timing, and perform intermittent rotation according to the program settings.
[0034] S3. After completion, remove the wax tube, dry it, and weigh it, recording the values as m1′, m2′, m3′, m4′, m5′, m6′, and m7′.
[0035] S4. Simultaneously perform a blank experiment.
[0036] S5. Clean and tidy up the instruments and equipment.
[0037] S6. Calculate the wax deposition rate: .
[0038] Example 2: Wax content experiment under different temperature programs
[0039] S1. Weigh the initial weights of the 8 wax tubes respectively, and record them as m1, m2, m3, m4, m5, m6, and m7.
[0040] Sufficient waxy crude oil was added to the S2 and 1-8 wax-forming tubes and placed inside the limiting cylinder. The temperature settings of the control panel program were as follows: No. 1, constant temperature 90℃ for 100 hours; No. 2, temperature decreasing from 90℃ to 80℃ at a constant rate for 100 hours; No. 3, temperature decreasing from 90℃ to 70℃ at a constant rate for 100 hours; No. 4, temperature decreasing from 90℃ to 65℃ at a constant rate for 100 hours; No. 5, temperature decreasing from 90℃ to 60℃ at a constant rate for 100 hours; No. 5, temperature decreasing from 90℃ to 55℃ at a constant rate for 100 hours; No. 6, temperature decreasing from 90℃ to 50℃ at a constant rate for 100 hours; and No. 7, temperature decreasing from 90℃ to 45℃ at a constant rate for 100 hours. After heating to the set temperature inside the limiting cylinder of the outer cylinder, timing was started and intermittent rotation was performed according to the program settings.
[0041] S3. After completion, remove the wax tube, dry it, and weigh it, recording the values as m1′, m2′, m3′, m4′, m5′, m6′, and m7′.
[0042] S4. Simultaneously perform a blank experiment.
[0043] S5. Clean and tidy up the instruments and equipment.
[0044] S6. Calculate the wax deposition rate: .
[0045] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.
Claims
1. A multifunctional paraffin prevention experimental device, characterized in that, It includes a base (1), an outer cylinder (2), a limiting cylinder (3), a waxing tube (22), a temperature sensor (15), and a motor (20); The wax tube (22) is placed inside the limiting cylinder (3). The bottom end of the outer cylinder (2) is fixed on the base (1). Multiple limiting cylinders (3) are evenly spaced inside the outer cylinder (2). Each limiting cylinder (3) is equipped with a temperature sensor (15) and a heating coil (14). The temperature sensor (15) is embedded in the inner wall of the limiting cylinder (3). The heating coil (14) is evenly arranged on the inner wall of the limiting cylinder (3). A rotating part (16) is provided at the bottom of the limiting cylinder (3). The motor (20) is located inside the base (1) below the rotating part (16). The drive shaft (19) of the motor (20) is fixedly connected to the rotating part (16).
2. The multifunctional anti-wax experiment device according to claim 1, characterized in that, The base (1) is provided with a control panel (11), which includes a display screen (6), a selection button (7), a confirmation button (8), a setting up button (9), and a setting down button (10).
3. The multifunctional anti-wax experiment device according to claim 2, characterized in that, The base (1) is equipped with a signal processor (12), which is electrically connected to a temperature sensor (15), a motor (20), and a display screen (6).
4. The multifunctional anti-wax experimental device according to claim 1, characterized in that, A buzzer (13) is provided on the base (1).
5. The multifunctional anti-wax experimental device according to claim 1, characterized in that, The limiting cylinder (3) is provided with a cover plate (4), which is pivotally connected to the outer cylinder (2) directly above it.
6. The multifunctional anti-wax experimental device according to claim 5, characterized in that, The cover plate (4) is a circular plastic component with an area slightly larger than the circular area at the top of the limiting cylinder (3). A groove (5) is provided on the outer side of the limiting cylinder (3). An electromagnet and an iron block are respectively provided on the cover plate (4) and the groove (5). During operation, the electromagnet is energized so that the cover plate (4) and the groove (5) are tightly joined.
7. The multifunctional anti-wax experimental apparatus according to claim 1, characterized in that, The bottom of the wax tube (22) is evenly distributed with multiple downward-facing limiting grooves (17), and the limiting grooves (17) are correspondingly set with the limiting posts (18) on the rotating part (16).
8. The multifunctional anti-wax test apparatus according to claim 1, characterized in that, The wax-forming tube (22) is provided with a top cover (21), and the top cover (21) is threadedly sealed to the opening of the wax-forming tube (22).