Device for testing solid-liquid adhesive force by rotating droplet method

Abstract

The utility model provides a solid-liquid adhesive force testing device adopting a rotating droplet method. The solid-liquid adhesive force testing device comprises a supporting frame, the U-shaped transmission frame is provided with a first connecting part, a second connecting part and a third connecting part, the second connecting part is arranged between the first connecting part and the third connecting part, and the first connecting part is rotationally connected to the supporting frame; the imaging mechanism is connected to one side, close to the first connecting part, of the second connecting part; the background light source is connected to one side, close to the third connecting part, of the second connecting part; the rotating cavity is connected to the second connecting part and located between the imaging mechanism and the background light source; and the servo motor is connected to the supporting frame, an output shaft of the servo motor penetrates through the supporting frame and then is fixedly connected with the third connecting part, and the servo motor is used for driving the U-shaped transmission frame to form different angles relative to the supporting frame. The problem that the interface chemical property of an oil-water-solid three-phase system cannot be accurately represented in the prior art is solved.

Description

Technical Field

[0001] This application belongs to the technical field of interfacial tension testing, and more specifically, relates to a device for testing the solid-liquid adhesion force by the rotating drop method. Background Art

[0002] Currently, the interfacial chemical measurement technology using the rotating drop method is mainly used to test the interfacial tension between a liquid-gas or oil-water two-phase system, and its main feature is the interfacial tension between two-phase liquids. However, in fact, the interfacial tension value of only the oil-water two-phase system does not conform to the actual production of oilfield chemistry. During the production of oilfield chemistry, especially during the exploitation of shale oil, crude oil is adsorbed in the capillary pores of rocks. Therefore, the key is to find an effective method to characterize the interfacial chemical properties of the oil-water-solid three-phase system. In the prior art, a common way to characterize the material properties between solid and liquid is the rotating drop method contact angle testing technology. However, when using the rotating drop method to test the oilfield chemistry three-phase system, since the contact angle value is usually greater than 90 degrees or the contact angle value is irregular because crude oil is a non-Newtonian fluid, it is ineffective or has poor repeatability when characterizing the oil-water-solid three-phase system. Summary of the Invention

[0003] The purpose of the embodiments of this application is to provide a device for testing the solid-liquid adhesion force by the rotating drop method, so as to solve the problem in the prior art that the interfacial chemical properties of the oil-water-solid three-phase system cannot be accurately characterized.

[0004] To achieve the above purpose, the technical solution adopted in this application is: to provide a device for testing the solid-liquid adhesion force by the rotating drop method, including:

[0005] A support frame,

[0006] A U-shaped transmission frame having a first connection portion, a second connection portion, and a third connection portion, the second connection portion being disposed between the first connection portion and the third connection portion, and the first connection portion being rotatably connected to the support frame;

[0007] An imaging mechanism connected to one side of the second connection portion close to the first connection portion;

[0008] A background light source connected to one side of the second connection portion close to the third connection portion;

[0009] A rotating cavity connected to the second connection portion between the imaging mechanism and the background light source;

[0010] A servo motor connected to the support frame, and an output shaft of the servo motor passing through the support frame and being fixedly connected to the third connection portion, the servo motor being used to drive the U-shaped transmission frame to be at different angles relative to the support frame.

[0011] Preferably, the rotating cavity includes:

[0012] The rotating cavity body mounting seat is fixedly connected to the second connecting part;

[0013] The rotating shaft is rotatably connected to the rotating cavity body mounting seat, and the rotating shaft has a hollow structure with one end open;

[0014] The sample tube is accommodated in the hollow structure;

[0015] The motor mounting bracket is fixedly connected to one end of the rotating cavity body mounting seat;

[0016] The high-speed rotating motor is fixedly connected to the motor mounting bracket and is used to drive the rotating shaft to rotate at a high speed.

[0017] Preferably, the rotating cavity includes:

[0018] The coupling is connected between the high-speed rotating motor and the rotating shaft, and the coupling is used to transmit the power of the high-speed rotating motor to the rotating shaft.

[0019] Preferably, the sample tube includes:

[0020] The sample tube body,

[0021] The first threaded seat is connected to one end of the sample tube body;

[0022] The first plug is connected to the end of the first threaded seat away from the sample tube body through a threaded structure;

[0023] The second threaded seat is connected to the end of the sample tube body away from the first threaded seat;

[0024] The second plug is connected to the end of the second threaded seat away from the sample tube body through a threaded structure.

[0025] Preferably, the imaging mechanism includes:

[0026] The XYZ three-axis adjustment platform is installed on the second connecting part;

[0027] The imaging system is connected to the XYZ three-axis adjustment platform and is used to capture and record images.

[0028] Preferably, two support plates are fixedly connected to the bottom of the support frame, and the two support plates are symmetrically arranged along the length direction of the support frame.

[0029] Preferably, horizontal adjustment feet are symmetrically connected to both of the two support plates.

[0030] Preferably, the horizontal adjustment feet have a threaded structure, threaded holes are formed on the support plate, and the threaded structure is screwed into the threaded holes.

[0031] Preferably, a limit nut is also screwed onto the threaded structure. During use, the upper end face of the limit nut abuts against the lower end face of the support plate, and the limit nut is used to protect the threaded structure.

[0032] Preferably, an adjusting nut is also fixedly connected to the horizontal adjustment feet, and the adjusting nut is used to adjust the height between the support plate and the ground.

[0033] The beneficial effects of the rotating droplet method solid-liquid adhesion force testing device provided by this application are as follows: Compared with the prior art, the oil-water-solid three-phase system testing device provided by the rotating droplet method solid-liquid adhesion force testing device of this application includes an overall rotation mechanism to control the inclination of the oil and water and read the inclination angle value for calculating the adhesion force. Through the change of the above technical route, it can effectively characterize the interfacial tension measurement of the oil-water-solid three-phase system in the actual production of oilfield chemistry, with high measurement accuracy and good repeatability, thus providing a guarantee for improving oil recovery and drilling quality. Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0035] Figure 1 It is a front view structural schematic diagram provided by an embodiment of this application;

[0036] Figure 2 It is provided by an embodiment of this application Figure 1 The right view structural schematic diagram in;

[0037] Figure 3 It is an internal top view structural schematic diagram of the rotating cavity provided by an embodiment of this application;

[0038] Figure 4 It is a perspective view of the sample tube provided by an embodiment of this application.

[0039] Among them, the reference numerals in the drawings are as follows:

[0040] 1. Support frame; 2. U-shaped drive frame; 21. First connection part; 22. Second connection part; 23. Third connection part; 3. XYZ three-axis adjustment platform; 4. Imaging system; 5. Rotating cavity; 51. High-speed rotating motor; 52. Coupling; 53. Motor mounting frame; 54. Rotating cavity body mounting seat; 55. Rotating shaft; 56. Sample tube; 561. First plug; 562. First threaded seat; 563. Solid sample (core); 564. Oil droplet sample; 565. Water sample (displacement agent); 566. Sample tube body; 567. Second threaded seat; 568. Second plug; 57. Bearing; 58. Connector; 59. Hollow structure; 6. Background light source; 7. Servo motor; 8. Support plate; 9. Horizontal adjustment feet; 91. Threaded structure; 92. Limit nut; 93. Adjusting nut. Detailed implementation manners

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0043] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0045] Please refer to Figures 1 to 4 together, and now the rotating droplet method solid-liquid adhesion force testing device provided by the embodiment of the present application will be described.

[0046] Rotating droplet method solid-liquid adhesion force testing device, including a support frame 1, a U-shaped transmission frame 2, an imaging mechanism, a background light source 6, a rotating cavity 5, and a servo motor 7.

[0047] Specifically, the support frame 1 is of a U-shaped structure. Two support plates 8 are fixedly connected to the bottom of the support frame 1, and the two support plates 8 are symmetrically arranged along the length direction of the support frame 1. Horizontally adjusting feet 9 are symmetrically connected to both of the two support plates 8, and the 4 horizontally adjusting feet 9 are symmetrically arranged in pairs. The horizontally adjusting foot 9 has a threaded structure 91, and threaded holes are formed on the support plate 8, and the threaded structure 91 is screwed with the threaded holes. A limit nut 92 is also screwed onto the threaded structure 91. During use, the upper end surface of the limit nut 92 abuts against the lower end surface of the support plate 8, and the limit nut 92 is used to protect the threads in the threaded structure 91. The horizontally adjusting foot 9 is also fixedly connected with an adjusting nut 93, and the adjusting nut 93 is used to adjust the height between the support plate 8 and the ground.

[0048] The U-shaped transmission frame 2 has a first connection part 21, a second connection part 22, and a third connection part 23. The second connection part 22 is arranged between the first connection part 21 and the third connection part 23, and the first connection part 21 is rotatably connected to the support frame 1; the imaging mechanism is connected to one side of the second connection part 22 close to the first connection part 21; the background light source 6 is connected to one side of the second connection part 22 close to the third connection part 23.

[0049] The rotating cavity 5 is connected to the second connection part 22 between the imaging mechanism and the background light source 6; specifically, the rotating cavity 5 includes: a rotating cavity main body mounting seat 54, which is fixedly connected to the second connection part 22 by screws; a rotating shaft 55, which is rotatably connected to the rotating cavity main body mounting seat 54 through a bearing 57, and one end of the rotating shaft 55 away from the motor mounting frame 53 has an open hollow structure 59; a connector 58 is arranged on one side of the hollow structure 59 close to the motor mounting frame 53, and the connector 58 has the function of fixing and limiting the sample tube 56; the sample tube 56 is accommodated in the hollow structure 59 and abuts against the connector 58; a motor mounting frame 53 is fixedly connected to one end of the rotating cavity main body mounting seat 54 by screws; a high-speed rotating motor 51 is fixedly connected to the motor mounting frame 53 by screws, and is used to drive the rotating shaft 55 to rotate at a high speed so that the sample tube 56 connected to the rotating shaft 55 rotates at a high speed with the rotating shaft 55; a coupling 52 is connected between the high-speed rotating motor 51 and the rotating shaft 55, and the coupling 52 is used to transmit the power of the high-speed rotating motor 51 to the rotating shaft 55.

[0050] The servo motor 7 is connected to the support frame 1, and the output shaft of the servo motor 7 passes through the support frame 1 and is fixedly connected to the third connecting portion 23 by screws. The servo motor 7 is used to drive the U-shaped transmission frame 2 to be at different angles relative to the support frame 1.

[0051] The imaging mechanism includes: an XYZ three-axis adjustment platform 3, which is installed on the second connecting portion 22 by screws; an imaging system 4, which is connected to the XYZ three-axis adjustment platform 3 by screws and is used to take and record images.

[0052] In this embodiment, the sample tube 56 includes: a sample tube body 566, a first threaded seat 562, a first plug 561, a second threaded seat 567, and a second plug 568.

[0053] Specifically, the first threaded seat 562 is connected to one end of the sample tube body 566; the first plug 561 is threadedly connected to the end of the first threaded seat 562 away from the sample tube body 566, and a receiving cavity is provided at the end of the first plug 561 away from the first threaded seat 562. During testing, the receiving cavity abuts against the connector 58; the second threaded seat 567 is connected to the end of the sample tube body 566 away from the first threaded seat 562; the second plug 568 is threadedly connected to the end of the second threaded seat 567 away from the sample tube body 566.

[0054] Principle: When performing an adhesion force test on the target system, start the servo motor 7 to drive the U-shaped transmission frame 2 to tilt, thereby driving the rotating cavity 5, the imaging system 4, and the background light source 6 to tilt together, so that the oil droplet sample 564 contacts the solid sample (core) 563 (it should be noted that both the oil droplet sample 564 and the solid sample (core) 563 are wrapped by the water sample (displacing agent) 565); use the Asakawa algorithm to solve the Young-Laplace equation of the rotating liquid droplet to test the interfacial tension value and buoyancy value during contact; then control the servo motor 7 to rotate in the reverse direction to drive the U-shaped transmission frame 2 to tilt in the reverse direction, thereby driving the rotating cavity 5, the imaging system 4, and the background light source 6 to tilt in the reverse direction together, so that the oil droplet sample 564 leaves the solid sample (core) 563, and the tilt angle value, interfacial tension value, and buoyancy value are read in real time; when the oil droplet sample 564 leaves the solid sample (core) 563, record the tilt angle value, interfacial tension value, and buoyancy value at this time. The adhesion force value is equal to the buoyancy value multiplied by the tilt angle value. Through the analysis of the adhesion force value and the interfacial tension value, a more efficient displacing agent can be effectively evaluated, that is, the oil droplet can easily leave the core, that is, the lower the adhesion force, the better the oil displacement effect.

[0055] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. Rotating drop method solid-liquid adhesion test device, characterized in that: include: Support frame, A U-shaped transmission frame, comprising a first connection portion, a second connection portion and a third connection portion, wherein the second connection portion is disposed between the first connection portion and the third connection portion, and the first connection portion is rotatably connected to the support frame; An imaging mechanism connected to a side of the second connecting portion close to the first connecting portion; A background light source connected to a side of the second connecting portion close to the third connecting portion; A rotating cavity connected to the second connecting portion and located between the imaging mechanism and the background light source; A servo motor is connected to the support frame, and an output shaft of the servo motor passes through the support frame and is fixedly connected to the third connecting portion. The servo motor is used to drive the U-shaped transmission frame to present different angles relative to the support frame.

2. The spinning drop method solid-liquid adhesion test device according to claim 1, characterized in that: The rotating cavity comprises: A rotating cavity body mounting seat, fixedly connected to the second connecting portion; A rotating shaft, rotatably connected to the rotating cavity main body mounting seat, and the rotating shaft has a hollow structure with one end open; A sample tube, accommodated in the hollow structure; A motor mounting frame, fixedly connected to one end of the rotating cavity main body mounting seat; A high-speed rotating motor is fixedly connected to the motor mounting frame and is used to drive the rotating shaft to rotate at a high speed.

3. The spinning drop method solid-liquid adhesion test device according to claim 2, characterized in that: The rotating cavity comprises: A coupling is connected between the high-speed rotating motor and the rotating shaft, and is used to transmit the power of the high-speed rotating motor to the rotating shaft.

4. The spinning drop method solid-liquid adhesion test device according to claim 3, characterized in that: The sample tube comprises: Sample tube body, A first threaded seat connected to one end of the sample tube body; A first plug connected to an end of the first threaded seat away from the sample tube body through a threaded structure; A second threaded seat connected to an end of the sample tube body away from the first threaded seat; The second plug is connected to an end of the second threaded seat away from the sample tube body through a threaded structure.

5. The spinning drop method solid-liquid adhesion test device according to any one of claims 1 to 4, characterized in that: The imaging mechanism comprises: An XYZ three-axis adjustment platform, mounted on the second connecting portion; The imaging system is connected to the XYZ three-axis adjustment platform and is used to capture and record images.

6. The spinning drop method solid-liquid adhesion test device according to claim 5, characterized in that: Two support plates are fixedly connected to the bottom of the support frame, and the two support plates are symmetrically arranged along the length direction of the support frame.

7. The spinning drop method solid-liquid adhesion test device according to claim 6, characterized in that: The two support plates are symmetrically connected with leveling feet.

8. The spinning drop method solid-liquid adhesion test device according to claim 7, characterized in that: The level adjustment foot has a threaded structure, a threaded hole is formed on the support plate, and the threaded structure is screwed to the threaded hole.

9. The spinning drop method solid-liquid adhesion test device according to claim 8, characterized in that: The threaded structure is also threadedly connected with a limiting nut. When in use, the upper end surface of the limiting nut abuts against the lower end surface of the support plate. The limiting nut is used to protect the threaded structure.

10. The spinning drop method solid-liquid adhesion test device according to claim 9, characterized in that: The level adjustment foot is also fixedly connected with an adjustment nut, and the adjustment nut is used to adjust the height between the support plate and the ground.

Images