A dissolved gas crude oil wax deposition test apparatus

Abstract

This utility model provides a device for testing wax deposition in dissolved gas crude oil, comprising: a fixed frame, a deposition component for depositing wax movably mounted on the upper side of the fixed frame, a deposition tank for storing crude oil on the left front side of the fixed frame, and a stripping component for stripping the deposited wax on the right front side of the fixed frame. Compared with the prior art, this utility model has the following advantages: by setting the deposition component and the deposition tank, the deposition cylinder can rotate circumferentially, thereby contacting more dissolved gas crude oil, thus simulating the effect of wax deposition under the movement of dissolved gas crude oil, avoiding the problem of test result distortion caused by static wax deposition, and helping to ensure the authenticity of the test environment. The setting of the stripping component, the fixed frame, and the deposition component reduces the amount of wax residue on the deposition cylinder, ensuring the authenticity and reliability of the test results.

Description

Technical Field

[0001] This utility model belongs to the field of dissolved gas crude oil wax deposition testing technology, and specifically relates to a dissolved gas crude oil wax deposition testing device. Background Technology

[0002] Existing dissolved gas crude oil wax deposition testing devices often struggle to completely remove deposited wax during wax sampling and measurement due to unreasonable structural design or limited operational methods, thus affecting the accuracy of test results. This problem mainly stems from the strong adhesion between the wax deposit layer and the inner wall of the testing device, especially in complex flow channels or dead zones, where the deposited wax tends to adhere firmly and is difficult to remove completely through conventional scraping or rinsing methods.

[0003] To address these issues, conventional methods include increasing manual scraping force, extending rinsing time, or raising the rinsing fluid temperature to soften the wax. However, these methods are not only cumbersome but also prone to human error. Furthermore, frequent contact and friction can damage the inner surface of the device, exacerbating wax deposition. Another approach is to use chemical solvents to dissolve residual wax, but this method easily contaminates the test sample and may corrode the device materials, affecting its lifespan and the realism of the testing environment. Therefore, we aim to design a novel dissolved crude oil wax deposition testing device to solve this problem. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a dissolved gas crude oil wax deposition testing device to solve the problems mentioned in the background technology.

[0005] This utility model is achieved through the following technical solution: a dissolved gas crude oil wax deposition test device, comprising: a fixed frame, a deposition component for depositing wax is movably installed on the upper side of the fixed frame, a deposition tank for storing crude oil is provided on the left front side of the fixed frame, and a stripping component for stripping the deposited wax is provided on the right front side of the fixed frame.

[0006] A long cylinder is fixed to the upper left side of the fixed frame, and a slide rail is fixed to the upper right side of the fixed frame for sliding installation of the slide block. The deposition assembly includes a sealing cover, and a large gear disk is rotatably installed at the lower end of the sealing cover. A deposition cylinder is fixed to the lower edge of the large gear disk. The deposition cylinder has a hollow interior and an injection port on its upper side for injecting refrigerant. In actual use, refrigerant, which can be liquid nitrogen or ice water, can be pre-injected into the deposition cylinder to accelerate the wax deposition rate of dissolved crude oil in the deposition tank.

[0007] In a preferred embodiment, the upper end of the sealing cover is fixedly connected to the lower end of the telescopic rod of the second long cylinder, the upper end of the second long cylinder is fixedly connected to the lower end of the cylinder block through a mounting plate, and the cylinder block is fixedly connected to the front end of the slide block.

[0008] In a preferred embodiment, telescopic guide rods are provided on the left front side and right rear side of the sealing cover to guide the up and down movement of the sealing cover, and a servo motor is installed on the right front side of the sealing cover.

[0009] In a preferred embodiment, the output shaft of the servo motor extends to the lower end of the sealing cover and is keyed to a small gear, which meshes with a large gear disk.

[0010] In a preferred embodiment, the lower end of the deposition cylinder is provided with a pointed portion, the axis of which is collinear with the axis of the deposition cylinder, and the axis of the deposition cylinder is not collinear with the straight line of the large gear disk.

[0011] In a preferred embodiment, the upper front side of the sedimentation tank is provided with a groove for injecting dissolved crude oil, and the upper side of the sedimentation tank extends downward to form a slot, the structure and size of which match the structure and size of the sealing cap.

[0012] In a preferred embodiment, the bottom of the slot is provided with a boss, and a sealing gasket is embedded and fixed on the upper surface of the boss. The sealing gasket is in movable contact with the lower surface of the sealing cover for sealing.

[0013] In a preferred embodiment, a rotating disk is rotatably mounted on the upper side of the peeling assembly via a ball bearing. Two guide ring grooves are provided on both the upper and lower sides of the rotating disk. The outer wall of the rotating disk is provided with teeth for meshing with a drive gear. A laser rangefinder sensor for measuring the thickness of the deposited wax is fixed on the upper side of the rotating disk. A heating chamber is provided inside the peeling assembly, and a heating cylinder is movably placed inside the heating chamber. In actual use, a spiral heating wire is provided on the outer side of the heating chamber for heating the heating chamber.

[0014] After adopting the above technical solution, the beneficial effects of this utility model are as follows: 1. By setting up a deposition component and a deposition tank, after a certain amount of dissolved crude oil is injected, the injection is stopped and the feed pipe is closed. Then, the servo motor can be started to drive the large gear disk to rotate, thereby causing the deposition cylinder installed on the large gear disk to rotate. Since the axis of the deposition cylinder is not collinear with the straight line of the large gear disk, the deposition cylinder can rotate in a circle, thereby contacting more dissolved crude oil, thus simulating the effect of wax deposition under the movement of dissolved crude oil, avoiding the problem of test result distortion caused by static wax deposition, and helping to ensure the authenticity of the test environment.

[0015] 2. The setup of the stripping assembly, fixing frame, and deposition assembly: After the deposition cylinder reaches the heating cylinder, the electric heating wire on the outside of the heating cylinder can be activated to heat the heating cylinder. The wax on the outer wall of the deposition cylinder will melt and fall into the heating cylinder for storage after being heated. Since the lower end of the deposition cylinder is provided with a pointed part, and the axis of the pointed part is collinear with the axis of the deposition cylinder, the melted wax can drip down quickly, thereby reducing the amount of wax residue on the deposition cylinder and ensuring the integrity of the wax collection as much as possible. This method will not contaminate the test sample and ensures that the test results are true and reliable. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of a dissolved gas crude oil wax deposition testing device according to the present invention.

[0018] Figure 2 This is a schematic diagram of the deposition cylinder and stripping component structure of a dissolved gas crude oil wax deposition testing device according to this utility model.

[0019] Figure 3 This is a schematic diagram of the deposition component structure of a dissolved gas crude oil wax deposition testing device according to the present invention.

[0020] In the diagram, 100 is the fixed frame, 110 is the long cylinder, 120 is the slide rail, and 130 is the slide block.

[0021] 200-Deposition assembly, 210-Cylinder block, 220-Long cylinder II, 230-Sealing cap, 231-Servo motor, 240-Deposition cylinder;

[0022] 300 - sedimentation tank, 310 - card slot, 311 - sealing gasket, 320 - feed pipe;

[0023] 400 - Peeling assembly, 410 - Laser rangefinder sensor, 420 - Heating cylinder. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] As the first embodiment of this utility model:

[0026] Please see Figures 1 to 3 A dissolved gas crude oil wax deposition test device includes: a fixed frame 100, a deposition component 200 for depositing wax is movably installed on the upper side of the fixed frame 100, a deposition tank 300 for storing crude oil is provided on the left front side of the fixed frame 100, and a stripping component 400 for stripping the deposited wax is provided on the right front side of the fixed frame 100.

[0027] A long cylinder 110 is fixed to the upper left side of the fixed frame 100, and a slide rail 120 is fixed to the upper right side of the fixed frame 100 for sliding installation of the slide block 130. The deposition assembly 200 includes a sealing cover 230, and a large gear disk is rotatably installed at the lower end of the sealing cover 230. A deposition cylinder 240 is fixed to the lower edge of the large gear disk. The deposition cylinder 240 has a hollow interior and an injection port on its upper side for injecting refrigerant. In actual use, refrigerant can be pre-injected into the deposition cylinder 240. The refrigerant can be liquid nitrogen or ice water, which can accelerate the wax deposition rate of dissolved crude oil in the deposition tank 300.

[0028] The upper end of the sealing cover 230 is fixedly connected to the lower end of the telescopic rod of the second long cylinder 220. The upper end of the second long cylinder 220 is fixedly connected to the lower end of the cylinder block 210 through the mounting plate. The cylinder block 210 is fixedly connected to the front end of the slide block 130.

[0029] Telescopic guide rods are provided on the left front side and right rear side of the sealing cover 230 to guide the up and down movement of the sealing cover 230. A servo motor 231 is installed on the right front side of the sealing cover 230.

[0030] The output shaft of the servo motor 231 extends to the lower end of the sealing cover 230 and is keyed to a small gear, which meshes with the large gear disk.

[0031] The lower end of the sedimentation cylinder 240 is provided with a tip, the axis of which is collinear with the axis of the sedimentation cylinder 240, and the axis of the sedimentation cylinder 240 is not collinear with the straight line of the large gear disk.

[0032] Specifically, by setting up the deposition assembly 200 and the deposition tank 300, in actual use, the long cylinder 110 on the fixing frame 100 is activated to drive the slide 130 to move to the left, thereby moving the entire deposition assembly 200 to the left, so that it is located on the upper side of the deposition tank 300 (the sealing cover 230 is placed directly above the slot 310 on the upper side of the deposition tank 300). Then, the cylinder block 210 and the long cylinder 220 are activated, causing the sealing cover 230 to move down and abut against the slot 310 on the upper side of the deposition tank 300. The sealing cover 230 abuts against the sealing gasket 311 inside the slot 310, deforming it and thus forming a seal. Before this, the sealing cover 230 is pre-filled with gaskets. Refrigerant is injected into the deposition cylinder 240. Then, pre-prepared dissolved gas crude oil is introduced into the deposition tank 300 through the feed pipe 320. After a certain amount of dissolved gas crude oil is injected, the injection is stopped and the feed pipe 320 is closed. Then, the servo motor 231 is started to drive the large gear disk to rotate, which in turn causes the deposition cylinder 240 mounted on the large gear disk to rotate. Since the axis of the deposition cylinder 240 is not collinear with the straight line of the large gear disk, the deposition cylinder 240 can rotate in a circle, thus contacting more dissolved gas crude oil. This simulates the effect of wax deposition under the movement of dissolved gas crude oil, avoiding the problem of test result distortion caused by wax deposition under static conditions, and helps to ensure the authenticity of the test environment.

[0033] As a second embodiment of this utility model:

[0034] Please see Figures 1 to 3 The upper front side of the sedimentation tank 300 is provided with a groove 310 for injecting dissolved crude oil. The upper side of the sedimentation tank 300 extends downward to form a groove 310. The structure and size of the groove 310 match the structure and size of the sealing cover 230.

[0035] The bottom of the slot 310 is provided with a boss, and a sealing gasket 311 is embedded and fixed on the upper surface of the boss. The sealing gasket 311 is in contact with the lower surface of the sealing cover 230 for sealing.

[0036] A rotating disk is mounted on the upper side of the peeling assembly 400 via a ball bearing. Two guide ring grooves are provided on the upper and lower sides of the rotating disk. The outer wall of the rotating disk is provided with teeth for meshing with the drive gear. A laser range sensor 410 for measuring the thickness of the deposited wax is fixed on the upper side of the rotating disk. A heating chamber is provided inside the peeling assembly 400. A heating cylinder 420 is movably placed inside the heating chamber. In actual use, a spiral heating wire is provided on the outside of the heating chamber for heating the heating chamber.

[0037] Based on the first embodiment described above, further, the arrangement of the stripping assembly 400, the fixing frame 100, and the deposition assembly 200 allows for the following in actual use: after deposition is completed, the cylinder block 210 and the long cylinder 220 can be activated to move the sealing cover 230 upwards, thereby lifting the deposition cylinder 240 below it. Finally, the long cylinder 110 is activated to move the slide 130 to the right. Subsequently, the servo motor 231 is activated to adjust the position of the deposition cylinder 240 so that it is directly opposite the heating cylinder 420. Then, the cylinder block 210 and the long cylinder 220 can be activated again to move the sealing plate downwards. This downward movement needs to be performed slowly. Since a rotating disk is mounted on the upper side of the stripping assembly 400 via a ball bearing, and two guide ring grooves are provided on the upper and lower sides of the rotating disk, and teeth are provided on the outer wall of the rotating disk for meshing with the drive gear. The rotating disk is equipped with a laser rangefinder 410 for measuring the thickness of the deposited wax. Activating the rotating disk inside the stripping assembly 400 causes the laser rangefinder 410 to rotate continuously, thus measuring the circumferential distance of the slowly descending deposition cylinder 240 and recording the thickness changes on the deposition cylinder 240, thereby generating wax deposition thickness data. Once the deposition cylinder 240 reaches the heating cylinder 420, the electric heating wire on the outside of the heating cylinder 420 is activated to heat it. The wax on the outer wall of the deposition cylinder 240 melts and falls into the heating cylinder 420 for storage. Because the lower end of the deposition cylinder 240 has a pointed tip with its axis collinear with the axis of the deposition cylinder 240, the melted wax can drip down quickly, reducing the amount of residual wax on the deposition cylinder 240 and ensuring the integrity of the wax sample. This method does not contaminate the test sample, ensuring the test results are accurate and reliable.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for testing dissolved gas crude oil wax deposition, comprising: A mounting frame (100) is characterized in that a deposition assembly (200) for depositing wax is movably mounted on the upper side of the mounting frame (100), a deposition tank (300) for storing crude oil is provided on the left front side of the mounting frame (100), and a stripping assembly (400) for stripping the deposited wax is provided on the right front side of the mounting frame (100). The upper left side of the fixed frame (100) is fixed with a long cylinder (110), and the upper right side of the fixed frame (100) is fixed with a slide rail (120) for sliding installation of the slide block (130). The deposition assembly (200) includes a sealing cover (230), and a large gear disk is rotatably installed at the lower end of the sealing cover (230). A deposition cylinder (240) is fixed on the lower edge of the large gear disk. The deposition cylinder (240) has a hollow interior and an injection port on its upper side for injecting refrigerant.

2. The dissolved gas crude oil wax deposition testing device as described in claim 1, characterized in that: The upper end of the sealing cover (230) is fixedly connected to the lower end of the telescopic rod of the second long cylinder (220). The upper end of the second long cylinder (220) is fixedly connected to the lower end of the cylinder block (210) through the mounting plate. The cylinder block (210) is fixedly connected to the front end of the slide (130).

3. The dissolved gas crude oil wax deposition testing device as described in claim 1, characterized in that: The sealing cover (230) is provided with telescopic guide rods on the left front side and right rear side to guide the sealing cover (230) to move up and down. A servo motor (231) is installed on the right front side of the sealing cover (230).

4. The dissolved gas crude oil wax deposition testing device as described in claim 3, characterized in that: The output shaft of the servo motor (231) extends to the lower end of the sealing cover (230) and is keyed to a small gear, which meshes with the large gear disk.

5. The dissolved gas crude oil wax deposition testing device as described in claim 1, characterized in that: The lower end of the deposition cylinder (240) is provided with a tip, the axis of which is collinear with the axis of the deposition cylinder (240), and the axis of the deposition cylinder (240) is not collinear with the straight line of the large gear disk.

6. The dissolved gas crude oil wax deposition testing device as described in claim 1, characterized in that: The upper front side of the sedimentation tank (300) is provided with a groove (310) for injecting dissolved crude oil. The upper side of the sedimentation tank (300) extends downward to form a groove (310). The structure and size of the groove (310) match the structure and size of the sealing cover (230).

7. The dissolved gas crude oil wax deposition testing device as described in claim 6, characterized in that: The bottom of the slot (310) is provided with a boss, and a sealing gasket (311) is embedded and fixed on the upper surface of the boss. The sealing gasket (311) is in contact with the lower surface of the sealing cover (230) for sealing.

8. The dissolved gas crude oil wax deposition testing device as described in claim 1, characterized in that: The peeling assembly (400) has a rotating disk mounted on its upper side via a ball bearing. The rotating disk has two guide ring grooves on its upper and lower sides. The outer wall of the rotating disk has teeth for meshing with a drive gear. A laser range sensor (410) for measuring the thickness of the deposited wax is fixed on the upper side of the rotating disk. The peeling assembly (400) has a heating chamber inside, and a heating cylinder (420) is movably placed inside the heating chamber.

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