Experimental device for testing corrosion rate of oil field thickening instrument

Abstract

The utility model relates to an experimental device for testing the corrosion rate of an oil field thickening instrument. According to the technical scheme, a slurry cup supporting seat is installed at the bottom of an inner cavity of a thickening instrument main kettle body, a slurry cup is installed on the upper portion of the slurry cup supporting seat, an upper cover, a polytetrafluoroethylene upper piston and a polytetrafluoroethylene lower piston are sequentially installed in the slurry cup, a cup shaft penetrates through the upper cover and the polytetrafluoroethylene upper piston to be connected to the polytetrafluoroethylene lower piston, and stirring blades are installed on the cup shaft. The national standard steel sheet is hung on the lower side of the polytetrafluoroethylene upper piston, and acid liquor is injected into the slurry cup; the upper end of the cup shaft penetrates through the cup shaft supporting base through a lengthening rod to be connected to the rotary driver. The corrosion rate testing device has the beneficial effects that the heat conduction oil is injected into the main kettle body of the thickening instrument, the stirring blades are driven to rotate through the cup shaft, the acid liquor is driven to quickly move, and the temperature of the slurry cup is controlled through the heat conduction oil, so that the corrosion rate test is realized, the cost performance is high, and the operation cost of an enterprise is reduced.

Description

Technical Field

[0001] The utility model relates to an auxiliary device for acidification in the petroleum industry, in particular to an experimental device for testing the corrosion rate of an oilfield thickener. Background Art

[0002] Currently, acidizing is an important measure for increasing the production of oil and gas wells or water injection wells, and plays a significant role in oilfield production. Specifically, acid is injected into the formation to dissolve the mineral components of the reservoir rock and the clogging reservoir materials caused by drilling, completion, workover, and oil production operations, thereby improving and enhancing the permeability of the reservoir, thereby increasing the production capacity of oil and gas wells. Common acidizing processes include pickling, matrix acidizing, and fracturing acidizing. The acidizing process requires the completion of corresponding corrosion experiments in ground laboratories. Through corrosion experiments, data measured on different types of steel sheets under different variables such as temperature, pressure, and corrosion time can be analyzed, thereby providing the necessary data support for acidizing construction.

[0003] Currently, the corrosion rate of steel sheets is primarily measured using equipment such as high-temperature, high-pressure dynamic corrosion testers or new modular high-temperature, high-pressure dynamic corrosion testers. These devices typically include a reactor, a data acquisition system, and a stirrer. During corrosion testing, a steel sheet is suspended from a sheet hanger within the reactor, and the stirrer is activated for testing.

[0004] The problem is that the purchase and maintenance costs of high-temperature and high-pressure dynamic corrosion testers and other advanced corrosion instruments are high, which imposes a heavy financial burden on some laboratories. Utility Model Content

[0005] The purpose of the utility model is to provide an oilfield thickener test corrosion rate experimental device to address the above-mentioned defects in the prior art, which can realize corrosion rate testing and reduce procurement and maintenance costs.

[0006] The utility model discloses an oilfield thickener test corrosion rate experimental device, and its technical scheme is as follows: comprising a cup shaft support seat (2), an extension rod (3), an upper cover (5), a cup shaft (6), a polytetrafluoroethylene upper piston (7), a national standard steel sheet (8), a stirring blade (9), a polytetrafluoroethylene lower piston (10), a slurry cup (11), a rotary driver (14), a motor (15), a thickener main kettle body (17), a gear (19), a belt (20), and a slurry cup support seat (21), wherein the bottom of the inner cavity of the thickener main kettle body (17) is provided with a slurry cup support seat (21), the upper part of the slurry cup support seat (21) is provided with a slurry cup (11), and the upper cover (5), the polytetrafluoroethylene upper piston (7), the polytetrafluoroethylene lower piston (10), the slurry cup (11), ... The invention relates to a polytetrafluoroethylene lower piston (10), and the cup shaft (6) passes through the upper cover (5) and the polytetrafluoroethylene upper piston (7) and is connected to the polytetrafluoroethylene lower piston (10). A stirring blade (9) is installed on the cup shaft (6) between the polytetrafluoroethylene upper piston (7) and the polytetrafluoroethylene lower piston (10). A national standard steel sheet (8) is hung on the lower side of the polytetrafluoroethylene upper piston (7). Acid is injected into the slurry cup (11); the upper end of the cup shaft (6) passes through the cup shaft support seat (2) through an extension rod (3) and is connected to the rotary driver (14); the rotary driver (14) is connected to the gear (19), and the gear (19) is connected to the motor (15) through a belt (20); and heat transfer oil (18) is injected into the main kettle body (17) of the thickener.

[0007] Preferably, the cup shaft support seat (2) is installed in the middle of the kettle cover (22), and the liquid level meter (1) is installed at the lower part of the kettle cover (22).

[0008] Preferably, the outer wall of the pulp cup (11) is wrapped with a polytetrafluoroethylene layer.

[0009] Preferably, the polytetrafluoroethylene upper piston (7) is provided with an acid injection screw hole and is sealed and connected via a polytetrafluoroethylene screw (16).

[0010] Preferably, the bottom of the slurry cup (11) is provided with one or more cup bottom plugs (12), and the cup bottom plugs (12) cooperate with the grooves (13) on the slurry cup support seat (21), and the slurry cup support seat (21) is fixedly installed on the bottom of the main kettle body (17) of the thickener.

[0011] Preferably, the upper end of the cup shaft (6) is connected to the lower end of the extension rod (3) via a quick connector (4).

[0012] The beneficial effects of the utility model are as follows: the utility model installs the upper cover, the polytetrafluoroethylene upper piston and the polytetrafluoroethylene lower piston in sequence in the slurry cup, and the cup shaft passes through the upper cover and the polytetrafluoroethylene upper piston to be connected to the polytetrafluoroethylene lower piston, the national standard steel sheet is hung on the lower side of the polytetrafluoroethylene upper piston, and the acid liquid is injected into the slurry cup; the upper end of the cup shaft passes through the cup shaft support seat through the extension rod to be connected to the rotary driver, and heat transfer oil is injected into the main kettle body of the thickener, and the stirring blade is driven to rotate through the cup shaft, thereby driving the acid liquid to move rapidly, and the temperature of the slurry cup is controlled by the heat transfer oil, thereby realizing the corrosion rate test, and the utility model has high cost performance and reduces the operating cost of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the dispersed structure of Example 1 of the present utility model;

[0014] Figure 2 This is a schematic diagram of the dispersed structure of Example 2 of the present utility model;

[0015] Figure 3 yes Figure 2 A schematic diagram of a cup holder in a top view;

[0016] In the above figure: liquid level gauge 1, cup shaft support 2, extension rod 3, quick connector 4, upper cover 5, cup shaft 6, PTFE upper piston 7, national standard steel sheet 8, stirring blade 9, PTFE lower piston 10, slurry cup wrapped with PTFE 11, cup bottom plug 12, groove 13, rotary driver 14, motor 15, PTFE screw 16, thickener main kettle 17, thermal oil 18, gear 19, belt 20, slurry cup support 21, kettle cover 22, outer base 23, cup rack 23. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0018] Example 1, with reference to Figure 1The utility model mentions an oilfield thickener corrosion rate test device, comprising a cup shaft support 2, an extension rod 3, an upper cover 5, a cup shaft 6, a polytetrafluoroethylene upper piston 7, a national standard steel sheet 8, a stirring blade 9, a polytetrafluoroethylene lower piston 10, a slurry cup 11, a rotary driver 14, a motor 15, a thickener main kettle 17, a gear 19, a belt 20, and a slurry cup support 21. The slurry cup support 21 is installed at the bottom of the inner cavity of the thickener main kettle 17, and the slurry cup 11 is installed on the upper part of the slurry cup support 21. The upper cover 5, the polytetrafluoroethylene upper piston 7, the polytetrafluoroethylene are installed in the slurry cup 11 in sequence. The lower piston 10 is provided with a cup shaft 6, and the cup shaft 6 passes through the upper cover 5 and the polytetrafluoroethylene upper piston 7 and is connected to the polytetrafluoroethylene lower piston 10. A stirring blade 9 is installed on the cup shaft 6 between the polytetrafluoroethylene upper piston 7 and the polytetrafluoroethylene lower piston 10. The national standard steel sheet 8 is hung on the lower side of the polytetrafluoroethylene upper piston 7, and the acid is injected into the slurry cup 11; the upper end of the cup shaft 6 is connected to the rotary driver 14 through the extension rod 3 through the cup shaft support seat 2, and the rotary driver 14 is connected to the gear 19, and the gear 19 is connected to the motor 15 through the belt 20; the heat transfer oil 18 is injected into the main kettle body 17 of the thickener.

[0019] The cup shaft support seat 2 is installed in the middle of the kettle cover 22 , and the liquid level meter 1 is installed at the lower part of the kettle cover 22 .

[0020] The outer wall of the pulp cup 11 is wrapped with a polytetrafluoroethylene layer.

[0021] The above-mentioned polytetrafluoroethylene upper piston 7 is provided with an acid injection screw hole and is sealed and connected via a polytetrafluoroethylene screw 16 .

[0022] The bottom of the slurry cup 11 is provided with one or more cup bottom plugs 12 , and the cup bottom plugs 12 cooperate with the grooves 13 on the slurry cup support 21 , and the slurry cup support 21 is fixedly installed on the bottom of the thickener main kettle 17 .

[0023] The upper end of the cup shaft 6 is connected to the lower end of the extension rod 3 through the quick connector 4.

[0024] When the utility model is used,

[0025] 1Fixing steel sheet: refer to Figure 1 , install the national standard steel sheet 8 vertically and fasten it in the polytetrafluoroethylene upper piston 7, keep the national standard steel sheet 8 firmly fixed to prevent displacement with the rotation of the fluid;

[0026] 2 Assemble accessories: Assemble the PTFE upper piston 7, national standard steel sheet 8, stirring blade 9 and PTFE lower piston 10 into a complete device according to the design requirements, and then place it in the slurry cup 11;

[0027] 3. Acid injection: The pre-prepared acid solution is injected into the slurry cup 11 through the acid injection screw hole of the polytetrafluoroethylene upper piston 7. Then, the corrosion-resistant polytetrafluoroethylene screw 16 is tightened into the acid injection screw hole to seal the acid solution and prevent leakage.

[0028] 4. Install the upper cover: Install the upper cover 5 on the upper part of the pulp cup 11 through threads, ensuring that the upper cover 5 is tightly connected to the pulp cup 11, further ensuring that the acid solution is sealed in the pulp cup 11;

[0029] 5. Connect the extension rod: Use the quick connector 4 to firmly connect the extension rod 3 to the upper end of the cup shaft 6. Make sure the connection is firm and aligned to maintain the stability of the cup.

[0030] 6. Place the slurry cup and start the equipment: Place the assembled slurry cup into the circular slurry cup support seat 21 in the kettle body, and the cup bottom plug 12 cooperates with the groove 13 on the slurry cup support seat 21, so that the slurry cup 11 can be stably fixed at the bottom; then, turn on the motor 15, and insert the liquid level gauge 1 into the lower part of the upper cover 5, which can monitor the problem of liquid level rise that may occur in the thermal oil under heating conditions. The motor 15 drives the gear 19 to rotate through the belt 20, and the gear 19 drives the rotary driver 14 to drive the cup shaft 6 to rotate, so that the stirring blade drives the acid liquid to rotate and start the corrosion experiment; after the motor is running normally, inject the thermal oil 18 into the kettle through the kettle cover 22, and insert a thermocouple to heat and monitor the temperature of the thermal oil, thereby realizing corrosion experiments at different temperatures, so there is no need to purchase high-temperature and high-pressure dynamic corrosion testers or other advanced corrosion instruments, and the corrosion experiment requirements in the oil field acidizing process can also be met.

[0031] Example 2, an oilfield thickener corrosion rate test device mentioned in the present invention, an oilfield thickener corrosion rate test device mentioned in the present invention, including a cup shaft support seat 2, an extension rod 3, an upper cover 5, a cup shaft 6, a polytetrafluoroethylene upper piston 7, a national standard steel sheet 8, a stirring blade 9, a polytetrafluoroethylene lower piston 10, a slurry cup 11, a rotary driver 14, a motor 15, a thickener main kettle body 17, a gear 19, a belt 20, and a slurry cup support seat 21. The slurry cup support seat 21 is installed at the bottom of the inner cavity of the thickener main kettle body 17, and the slurry cup 11 is installed on the upper part of the slurry cup support seat 21. The upper cover 5, A polytetrafluoroethylene upper piston 7 and a polytetrafluoroethylene lower piston 10 are provided, and the cup shaft 6 passes through the upper cover 5 and the polytetrafluoroethylene upper piston 7 and is connected to the polytetrafluoroethylene lower piston 10. A stirring blade 9 is installed on the cup shaft 6 between the polytetrafluoroethylene upper piston 7 and the polytetrafluoroethylene lower piston 10. A national standard steel sheet 8 is hung on the lower side of the polytetrafluoroethylene upper piston 7, and acid is injected into the slurry cup 11; the upper end of the cup shaft 6 is connected to the rotary driver 14 through the extension rod 3 through the cup shaft support seat 2, and the rotary driver 14 is connected to the gear 19, and the gear 19 is connected to the motor 15 through a belt 20; heat transfer oil 18 is injected into the main kettle body 17 of the thickener.

[0032] The difference from Example 1 is:

[0033] Reference Figure 2 and Figure 3 The cup holder 23 is installed on the upper part of the slurry cup 11 to further fix the slurry cup 11 and prevent the slurry cup 11 from tipping over or shifting under the rapid rotation of the internal acid solution, making the experiment safer and more reliable.

[0034] The above description is merely a preferred embodiment of the present invention. Anyone skilled in the art may utilize the above-described technical solutions to modify the present invention or create equivalent technical solutions. Therefore, any simple modifications or equivalent transformations based on the technical solutions of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An oilfield thickener test corrosion rate experimental device, characterized by: The invention comprises a cup shaft support seat (2), an extension rod (3), an upper cover (5), a cup shaft (6), a polytetrafluoroethylene upper piston (7), a national standard steel sheet (8), a stirring blade (9), a polytetrafluoroethylene lower piston (10), a slurry cup (11), a rotary driver (14), a motor (15), a thickener main kettle body (17), a gear (19), a belt (20), and a slurry cup support seat (21). The bottom of the inner cavity of the thickener main kettle body (17) is provided with a slurry cup support seat (21), the upper part of the slurry cup support seat (21) is provided with a slurry cup (11), the upper cover (5), the polytetrafluoroethylene upper piston (7), and the polytetrafluoroethylene lower piston (10) are sequentially provided in the slurry cup (11), and the cup shaft (6) is passed through the inner cavity of the thickener main kettle body (17). The upper cover (5) and the polytetrafluoroethylene upper piston (7) are connected to the polytetrafluoroethylene lower piston (10), and a stirring blade (9) is installed on the cup shaft (6) between the polytetrafluoroethylene upper piston (7) and the polytetrafluoroethylene lower piston (10). The national standard steel sheet (8) is hung on the lower side of the polytetrafluoroethylene upper piston (7), and the acid liquid is injected into the slurry cup (11); the upper end of the cup shaft (6) is connected to the rotary driver (14) through the extension rod (3) through the cup shaft support seat (2), and the rotary driver (14) is connected to the gear (19), and the gear (19) is connected to the motor (15) through the belt (20); the heat transfer oil (18) is injected into the main kettle body (17) of the thickener.

2. The oilfield thickener test corrosion rate experimental device according to claim 1, characterized in that: The cup shaft support seat (2) is installed in the middle of the kettle cover (22), and the liquid level meter (1) is installed at the lower part of the kettle cover (22).

3. The oilfield thickener test corrosion rate experimental device according to claim 2, characterized in that: The outer wall of the pulp cup (11) is wrapped with a polytetrafluoroethylene layer.

4. The oilfield thickener test corrosion rate experimental device according to claim 3, characterized in that: The polytetrafluoroethylene upper piston (7) is provided with an acid injection screw hole and is sealed and connected via a polytetrafluoroethylene screw (16).

5. The oilfield thickener test corrosion rate experimental device according to claim 4, characterized in that: The bottom of the slurry cup (11) is provided with one or more cup bottom plugs (12), and the cup bottom plugs (12) cooperate with the grooves (13) on the slurry cup support seat (21), and the slurry cup support seat (21) is fixedly installed on the bottom of the main kettle body (17) of the thickener.

6. The oilfield thickener test corrosion rate experimental device according to claim 1, characterized in that: The upper end of the cup shaft (6) is connected to the lower end of the extension rod (3) via a quick connector (4).

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