Cement paste performance evaluation apparatus and method

Abstract

The application provides a cement paste performance evaluation device and method. The device comprises a supporting device, a testing device, a curing device and a heating device; the curing device is arranged on the supporting device and is used for curing the cement paste; the testing device is arranged on the supporting device and is communicated with the curing device, is used for carrying testing water, receiving the cement paste and detecting parameters of the testing water; and the heating device is arranged on the curing device and the testing device and is used for heating the curing device and the testing device to a required temperature. In the application, a parameter change curve is drawn according to the parameters of the water, and then the performance of the cement paste is evaluated; the heating device heats the curing device and the testing device, which not only meets the required temperature of the curing device for curing the cement paste, but also detects the parameters of the water at different temperatures, and then quickly and accurately evaluates the performance of the cement paste at different temperatures, provides a basis for optimizing the formula of the cement paste, and expands the use range of the evaluation device.

Description

Technical Field

[0001] This invention relates to the field of cement slurry technology, and more specifically, to a cement slurry performance evaluation device and method. Background Technology

[0002] Currently, in many oilfields both domestically and internationally that have entered the late stages of development, the dilution, dissolution, migration, and mass exchange of formation water during cementing directly affect the cement slurry's solidification process, compromising its designed performance and creating flow channels between the cement sheath and the formation. This leads to reduced cementing quality or even cementing operation failure. To address the water intrusion problem that easily occurs during cementing of high water-cut oil and gas wells, targeted research has been conducted on cement slurries. Through the development of anti-dispersion materials, a water-resistant cement slurry has been developed to prevent dilution and erosion by formation water during the setting process, thus ensuring the sealing integrity of the cement sheath.

[0003] To better guide the optimization design of water-resistant cement paste formulations, it is necessary to evaluate the water erosion resistance of cement pastes. However, existing water erosion resistance evaluation methods are conducted in the low-temperature range below 100℃, and cannot evaluate the water erosion resistance in the high-temperature range above 100℃. Summary of the Invention

[0004] In view of this, the present invention proposes a cement slurry performance evaluation device, aiming to solve the problem that the existing technology cannot evaluate the water erosion resistance of cement slurry in a high-temperature range above 100℃. The present invention also proposes a cement slurry performance evaluation method.

[0005] In one aspect, the present invention provides a cement slurry performance evaluation device, which includes: a support device, a testing device, a curing device, and a heating device; wherein, the curing device is disposed on the support device and is used to cure the cement slurry; the testing device is disposed on the support device and connected to the curing device, and is used to carry test water, receive cement slurry, and detect parameters of the test water; the heating device is disposed on the curing device and the testing device and is used to heat the curing device and the testing device to the required temperature.

[0006] Furthermore, in the aforementioned cement slurry performance evaluation device, the curing device is placed above the testing device, and the bottom of the curing device and the top of the testing device are connected by a liquid pipeline to allow the cement slurry to be transported from the curing device to the testing device. In addition, the curing device and the testing device are also connected by an air pipeline to ensure that the pressure inside the curing device and the testing device is balanced.

[0007] Furthermore, in the aforementioned cement slurry performance evaluation device, the testing device includes: a testing vessel, a funnel, and a detection device; wherein, the testing vessel is disposed on a supporting device, and the top wall of the testing vessel has an inlet connected to a liquid pipeline, and the side wall of the testing vessel near the top has a first connecting port connected to a gas pipeline; the funnel is adjustablely disposed inside the testing vessel, and the outlet of the funnel faces the bottom wall of the testing vessel; the detection device is disposed inside the testing vessel and is used to detect the parameters of the test water.

[0008] Furthermore, in the aforementioned cement slurry performance evaluation device, the parameters of the test water include one or more of the following: conductivity, turbidity, and pH value; the detection device includes at least one detection probe; wherein each detection probe is set inside the test vessel, and each detection probe is used to detect the parameter associated with the detection probe, and the parameter associated with the detection probe is any one of conductivity, turbidity, and pH value.

[0009] Furthermore, the aforementioned cement slurry performance evaluation device also includes: a processing device and a collection device; wherein, the collection device is electrically connected to the detection device and is used to collect the parameters of the test water detected by the detection device; the processing device is electrically connected to the collection device and is used to plot the parameter change curve based on the parameters of the test water, and to evaluate the performance of the cement slurry based on the parameter change curve.

[0010] Furthermore, in the aforementioned cement slurry performance evaluation device, the side wall of the test vessel near the bottom is made of transparent material.

[0011] Furthermore, in the aforementioned cement slurry performance evaluation device, the curing device includes: a curing vessel and a mixing mechanism; wherein, the curing vessel is mounted on a support device, and the top of the curing vessel is provided with an openable and closable cover; the bottom wall of the curing vessel has an outlet connected to a liquid pipeline, and the side wall of the curing vessel near the top has an air inlet and a second connecting port connected to an air pipeline; the mixing mechanism is located inside the curing vessel.

[0012] Furthermore, in the above-mentioned cement slurry performance evaluation device, the heating device includes: a first heating jacket, a second heating jacket, and a heating plate; wherein, the first heating jacket is fitted onto the outer wall of the curing device; the second heating jacket is fitted onto the outer wall of the testing device; and the heating plate is located at the bottom of the testing device.

[0013] In this invention, a curing device cures the cement slurry, and a testing device is connected to the curing device. The testing device transports the cured cement slurry to test water and detects the parameters of the test water. Based on the parameters of the test water, a parameter change curve is plotted to evaluate the performance of the cement slurry. A heating device heats both the curing device and the testing device, which not only meets the temperature requirements of the curing device for cement slurry preparation and curing, but also enables the detection of test water parameters at different temperatures. This allows for rapid and accurate evaluation of the performance of the cement slurry at different temperatures, providing a basis for optimizing the cement slurry formulation, expanding the application range of the evaluation device, and solving the problem in the prior art that the water erosion resistance of cement slurry in the high-temperature range above 100°C cannot be evaluated.

[0014] On the other hand, the present invention also proposes a method for evaluating the performance of cement slurry using any of the above-mentioned cement slurry performance evaluation devices. The method includes the following steps: an injection step, in which a preset amount of test water is injected into the testing device through a curing device; a curing step, in which the prepared cement slurry is injected into the curing device and the cement slurry is cured; a testing step, in which the cement slurry is transported to the testing device after the cement slurry curing is completed, and the parameters of the test water are tested; and an evaluation step, in which the performance of the cement slurry is evaluated based on the tested parameters of the test water.

[0015] Furthermore, in the above-mentioned cement slurry performance evaluation method, the parameters of the test water in the testing step include one or more of the following: conductivity, turbidity, and pH value; in the evaluation step, the change curves of the corresponding parameters are plotted based on the parameters of the test water, and the performance of the cement slurry is evaluated.

[0016] In this invention, test water is injected into the testing device through a curing device, and cement slurry is cured in the curing device. After the cement slurry is cured, it is transported to the test water in the testing device, and the parameters of the test water are detected. The performance of the cement slurry is evaluated based on the parameters of the test water. This method is simple to operate, can quickly and accurately evaluate the performance of cement slurry, facilitates the optimization of cement slurry formulation, and provides a scientific basis for the formulation optimization design of cement slurry system. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of the cement slurry performance evaluation device provided in an embodiment of the present invention;

[0019] Figure 2This is a structural block diagram of the cement slurry performance evaluation device provided in an embodiment of the present invention;

[0020] Figure 3 A flowchart of a cement slurry performance evaluation method provided in an embodiment of the present invention. Detailed Implementation

[0021] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] Device Example:

[0023] See Figures 1 to 2 The figure shows a preferred structure of the cement slurry performance evaluation device in this embodiment. As shown, the cement slurry performance evaluation device includes: a support device 1, a testing device 2, a curing device 3, and a heating device. The curing device 3 is disposed on the support device 1 and is used to cure the cement slurry.

[0024] The testing device 2 is mounted on the support device 1 and is connected to the curing device 3. The testing device 2 carries the test water and receives the cured cement slurry delivered by the curing device 3. The cement slurry falls into the test water within the testing device 2, which also detects the parameters of the test water. Based on the detected parameters, a parameter variation curve is plotted, and the performance of the cement slurry is quantitatively evaluated based on the parameter variation curve. Specifically, the test water can be deionized water. The water erosion resistance of the cement slurry can be evaluated based on the parameter variation curve, and other properties of the cement slurry can also be evaluated according to actual needs; this embodiment does not impose any limitations in this regard.

[0025] The heating device is installed on the curing device 3 and the testing device 2. The heating device is used to heat the curing device 3 and the testing device 2 to the required temperature. Specifically, the heating device heats the curing device 3 and the testing device 2 simultaneously. When the curing device 3 is curing the cement slurry, the heating device heats the curing device 3 and the testing device 2 at the same time.

[0026] Before the cured cement slurry is transported into the testing device 2, the heating device heats the testing device 2 to the required temperature to evaluate the performance of the cement slurry at that required temperature.

[0027] As can be seen, in this embodiment, the curing device 3 cures the cement slurry, and the testing device 2 is connected to the curing device 3. The testing device 2 transports the cured cement slurry to the test water and detects the parameters of the test water. Based on the parameters of the test water, a parameter change curve is plotted to evaluate the performance of the cement slurry. The heating device heats the curing device 3 and the testing device 2, which not only meets the temperature required by the curing device 3 for curing the cement slurry, but also enables the detection of the parameters of the test water at different temperatures. This allows for a rapid and accurate evaluation of the performance of the cement slurry at different temperatures, providing a basis for optimizing the cement slurry formulation, expanding the application range of the evaluation device, and solving the problem in the prior art that the water erosion resistance of cement slurry in the high-temperature range above 100°C cannot be evaluated.

[0028] See Figure 1 In the above embodiment, the curing device 3 is placed above the testing device 2, thus the curing device 3 and the testing device 2 are arranged vertically. The bottom of the curing device 3 and the top of the testing device 2 are positioned opposite each other, and the bottom of the curing device 3 and the top of the testing device 2 are connected by a liquid pipeline, so that cement slurry can be transported from the curing device 3 to the testing device 2 through the liquid pipeline. Specifically, an on / off valve 10 is provided on the liquid pipeline, which controls the opening and closing of the liquid pipeline. In a specific implementation, the on / off valve 10 can be a ball valve.

[0029] The maintenance device 3 and the testing device 2 are also connected by an air passage 4, which is used to balance the pressure in the maintenance device 3 and the testing device 2. Specifically, a first valve 14 is provided on the air passage 4, which controls the opening and closing of the air passage 4, and the first valve 14 is normally open.

[0030] Preferably, at least one air pipe 4 is provided between the curing device 3 and the testing device 2 to ensure that the pressure in the curing device 3 and the pressure in the testing device 2 are balanced.

[0031] See Figure 1 The support device 1 includes a base 11, a support column 12, and multiple support rods 13. The support column 12 is vertically mounted on the base 11, and the testing device 2 is mounted on the base 11 and positioned to one side of the support column 12. Each support rod 13 extends along the height direction of the support column 12. Figure 1As shown in the top-to-bottom direction, the support rods 13 are spaced apart, and each support rod 13 is detachably connected to the testing device 2 and the curing device 3, respectively. Specifically, the first end of each support rod 13 is vertically connected to the support column 12, and the second end of each support rod 13 is detachably connected to either the testing device 2 or the curing device 3. Thus, the testing device 2 is not only mounted on the base 11 but is also fixed by multiple support rods 13. The curing device 3 is positioned above the testing device 2. To ensure the stability of the curing device 3, it is connected to the support column 12 via multiple support rods 13.

[0032] The testing device 2 includes a testing vessel 21, a funnel 22, and a detection device 23. The testing vessel 21 is disposed on the support device 1. Specifically, the bottom of the testing vessel 21 is disposed on the base 11, and the side of the testing vessel 21 facing the support column 12 is detachably connected to a plurality of support rods 13.

[0033] The test vessel 21 is hollow inside. A liquid inlet is located on the top wall of the test vessel 21, which connects to a liquid pipeline. A first connecting port is located on the side wall near the top of the test vessel 21, which connects to a gas pipeline 4. An air outlet 211 is also located on the side wall near the top of the test vessel 21, which connects to an air outlet pipeline. A second valve 15 and a safety valve are installed on the air outlet pipeline. The air outlet 211 is used for pressure relief; when the pressure inside the test vessel 21 is too high, the air outlet 211 automatically opens to relieve the pressure.

[0034] The funnel 22 is adjustablely positioned within the test vessel 21, with its outlet facing the bottom wall of the vessel 21. Specifically, the position of the funnel 22 within the test vessel 21 is adjustable to regulate the distance between its outlet and the test water, i.e., the distance between the cement slurry and the surface of the test water. Different distances result in different test results for the cement slurry. Furthermore, the funnel 22's placement facilitates control of the flow rate of the cement slurry into the test water, thereby facilitating the evaluation of the cement slurry's performance.

[0035] The funnel 22 may include an inlet section 221, a conical section 222, and an outlet section 223 connected in sequence. The cross-sectional shape of the inlet section 221 matches the cross-sectional shape of the test vessel 21, and the outer diameter of the inlet section 221 is slightly smaller than the inner diameter of the test vessel 21. The larger end of the conical section 222 is connected to the inlet section 221, and the smaller end of the conical section 222 is connected to the outlet section 223. The outer diameter of the outlet section 223 is smaller than the outer diameter of the inlet section 221. The inlet section 221 is tunably connected to the test vessel 21, and the outlet section 223 is closer to the bottom wall of the test vessel 21 than the inlet section 221. Specifically, the funnel 22 may be made of iron or stainless steel.

[0036] Preferably, the outer wall of the funnel 22 is threaded, and the inner wall of the test vessel 21 is threaded. The funnel 22 is screwed to the test vessel 21, and its position within the test vessel 21 can be adjusted by turning the funnel 22. Specifically, the outer wall of the liquid inlet section 221 in the funnel 22 is threaded, and this liquid inlet section 221 is screwed to the inner wall of the test vessel 21. In a practical implementation, to facilitate turning the funnel 22, the bottom wall of the test vessel 21 can be configured as an openable and closable structure, that is, the bottom wall of the test vessel 21 is connected to the side wall of the test vessel 21 in an openable and closable manner. Thus, by opening the bottom wall of the test vessel 21, the funnel 22 can be turned, thereby adjusting its position.

[0037] Preferably, the side wall of the test vessel 21 near the bottom is made of transparent material, which makes it easy to observe the state of the cement slurry falling into the test water, thereby qualitatively evaluating the performance of the cement slurry.

[0038] In practice, the material of the test vessel 21 can be at least one of iron, stainless steel, glass, or resin. Among them, glass or resin is a transparent material.

[0039] The detection device 23 is installed inside the test vessel 21, and is used to detect the parameters of the test water. The parameters of the test water include one or more of the following: conductivity, turbidity, and pH value.

[0040] The detection device 23 includes at least one detection probe. Each detection probe is disposed within the test vessel 21, and each probe is used to detect a parameter associated with it, which is any one of conductivity, turbidity, and pH value. Specifically, when one detection probe is disposed within the test vessel 21, it can detect any one of the conductivity, turbidity, and pH value of the test water. Correspondingly, the detection probe can be a conductivity meter, a turbidity meter, or a pH meter. When two or more detection probes are disposed within the test vessel 21, each probe can detect the conductivity, turbidity, or pH value of the test water, but the parameters detected by each probe are different.

[0041] In practice, the detection probe is positioned near the bottom of the test vessel 21 and placed in the test water. The material of the test vessel 21 below the detection probe is transparent. Alternatively, the material of the test vessel 21 below the detection probe is glass, while the material above the detection probe can be stainless steel.

[0042] See Figure 2 The cement slurry performance evaluation device also includes a processing device 5 and a collection device 6. The collection device 6 is electrically connected to the detection device 23 and is used to collect parameters of the test water detected by the detection device 23.

[0043] The processing device 5 is electrically connected to the acquisition device 6. The processing device 5 receives the parameters of the test water sent by the acquisition device 6, plots parameter change curves based on these parameters, and evaluates the performance of the cement slurry based on these curves. Specifically, when the detection device 23 detects the conductivity of the test water, the processing device 5 plots a conductivity change curve based on the conductivity of the test water and evaluates the performance of the cement slurry based on the conductivity change curve. When the detection device 23 detects the turbidity of the test water, the processing device 5 plots a turbidity change curve based on the turbidity of the test water and evaluates the performance of the cement slurry based on the turbidity change curve. When the detection device 23 detects the pH value of the test water, the processing device 5 plots a pH value change curve based on the pH value of the test water and evaluates the performance of the cement slurry based on the pH value change curve.

[0044] See Figure 1 In the above embodiments, the curing device 3 includes a curing vessel 31 and a stirring mechanism 32. The curing vessel 31 is disposed on the support device 1, specifically, the curing vessel 31 is positioned above the test vessel 21, and the curing vessel 31 and the test vessel 21 are connected via a quick connector 17. The side of the curing vessel 31 facing the support column 12 is detachably connected to multiple support rods 13.

[0045] The top of the curing tank 31 ( Figure 1 The upper part shown is provided with an openable and closable cover. Specifically, the top of the curing tank 31 is open, and the cover is connected to the top of the curing tank 31 in an openable and closable manner. The top of the curing tank 31 can be closed by the cover or the top of the curing tank 31 can be left open to facilitate the injection of materials into the curing tank 31.

[0046] The curing vessel 31 has a liquid outlet on its bottom wall, which is connected to a liquid pipeline. A second connecting port is located on the side wall near the top of the curing vessel 31, connecting to a gas pipeline 4. A first valve 14 is positioned near the second connecting port. An air inlet 311 is also located on the side wall near the top of the curing vessel 31, connected to an air inlet pipe. A third valve 16 is installed on the air inlet pipe, which is also connected to an air source to regulate the pressure inside the curing vessel 31. Specifically, the air source can be a nitrogen source or other gases; this embodiment does not impose any limitations on this.

[0047] In practice, according to the pressure required to evaluate the performance of the cement slurry, air at a preset pressure is supplied into the curing tank 31 through an air source to adjust the pressure inside the curing tank 31, thereby enabling the evaluation of the performance of the cement slurry under the required pressure.

[0048] The mixing mechanism 32 is installed inside the curing tank 31. The mixing mechanism 32 is used to mix the cement slurry being cured inside the curing tank 31 to ensure that the cement slurry is heated evenly.

[0049] Preferably, the stirring mechanism 32 includes: a motor 321, a stirring shaft 322, and multiple stirring blades 323. The motor 321 is located outside the curing vessel 31, and is connected to the support column 12 via a support rod 13. The drive end of the motor 321 is connected to the first end of the stirring shaft 322. Figure 1 The upper end shown is connected to the top of the cover and the curing vessel 31. The stirring shaft 322 is rotatably inserted through the top of the cover and the curing vessel 31. The second end of the stirring shaft 322 ( Figure 1 The lower end shown is placed inside the curing vessel 31 and extends towards the bottom wall of the curing vessel 31. Each stirring blade 323 is spaced apart from the portion of the stirring shaft 322 that is placed inside the curing vessel 31.

[0050] As can be seen, in this embodiment, the maintenance device 3 has a simple structure and is easy to implement.

[0051] See Figure 1 In the above embodiments, the heating device includes: a first heating sleeve 7, a second heating sleeve 8, and a heating plate 9. The first heating sleeve 7 is fitted onto the outer wall of the curing device 3, that is, onto the outer wall of the curing vessel 31. The second heating sleeve 8 is fitted onto the outer wall of the testing device 2, that is, onto the outer wall of the testing vessel 21.

[0052] The heating plate 9 is located at the bottom of the testing device 2, that is, the heating plate 9 is located between the bottom wall outside the testing vessel 21 and the base 11.

[0053] In practice, the first heating jacket 7, the second heating jacket 8, and the heating plate 9 are all electrically heated, and can heat the curing vessel 31 and the testing vessel 21 when powered on.

[0054] Preferably, a first temperature testing device is installed inside the test vessel 21 to detect the temperature inside the test vessel 21. A second temperature testing device is installed inside the curing vessel 31 to detect the temperature inside the curing vessel 31. A pressure detection device is installed on the gas pipeline 4 to detect the pressure inside the test vessel 21 and the curing vessel 31.

[0055] The first temperature testing device, the second temperature testing device, and the pressure detection device can all be electrically connected to the data acquisition device 6. The data acquisition device 6 sends the temperature inside the test vessel 21, the temperature inside the curing vessel 31, and the pressure inside the test vessel 21 and the curing vessel 31 to the processing device 5. Based on these temperature and pressure data, the processing device 5 determines the parameter change curves under different temperatures and pressures, and then evaluates the performance of the cement slurry under different temperatures and pressures.

[0056] In practice, the components of the cement slurry performance evaluation device are well sealed, can withstand pressure up to 2MPa, and have a temperature range from room temperature to 200℃.

[0057] In summary, in this embodiment, the curing device 3 cures the cement slurry, and the testing device 2 is connected to the curing device 3. The testing device 2 transports the cured cement slurry to the test water and detects the parameters of the test water. Based on the parameters of the test water, a parameter change curve is plotted to evaluate the performance of the cement slurry. The heating device heats the curing device 3 and the testing device 2, which not only meets the temperature requirements of the curing device 3 for the preparation and curing of cement slurry, but also enables the detection of the parameters of the test water at different temperatures. This allows for a rapid and accurate evaluation of the performance of the cement slurry at different temperatures. In other words, it enables a simple and rapid evaluation of the performance of different cement slurry formulations based on actual temperature requirements. The device has a simple structure and a wide operating temperature range, providing a scientific basis for the optimized design of cement slurry system formulations.

[0058] Method Implementation Examples:

[0059] This embodiment also proposes a method for evaluating cement slurry performance using any of the above-mentioned cement slurry performance evaluation devices. (See [link to relevant documentation]) Figure 3 The method for evaluating the performance of cement slurry includes the following steps:

[0060] In step S1, a preset amount of test water is injected into the test device through the maintenance device.

[0061] Specifically, the implementation process of the maintenance device and the testing device can be found in the above description, and will not be repeated here in this embodiment.

[0062] See Figure 1 The maintenance device 3 is placed above the testing device 2, and the bottom of the maintenance device 3 is connected to the top of the testing device 2 through a liquid pipeline, which is equipped with an on / off valve 10.

[0063] The testing apparatus 2 includes a testing vessel 21, a funnel 22, and a detection device 23. The testing vessel 21 has an inlet on its top wall that communicates with a liquid pipeline. The funnel 22 is adjustablely positioned inside the testing vessel 21, with its outlet facing the bottom wall of the testing vessel 21. The detection device 23 is located inside the testing vessel 21 to detect the parameters of the test water.

[0064] The curing device 3 includes a curing vessel 31 and a stirring mechanism 32. The curing vessel 31 has an openable and closable cover on its top, and a liquid outlet connected to a liquid pipeline is opened on the bottom wall of the curing vessel 31. The stirring mechanism 32 is located inside the curing vessel 31.

[0065] Before injecting the test water, both the testing device 2 and the curing device 3 are empty. The lid of the curing vessel 31 is opened, leaving the top of the vessel open, and the on / off valve 10 on the liquid pipeline is opened. Then, a preset amount of test water is injected into the top of the curing vessel 31. The test water passes through the curing vessel 31 and the liquid pipeline before being delivered to the testing device 2. After the test water injection is complete, the on / off valve 10 is closed, and the lid of the curing vessel 31 is closed.

[0066] In step S2, the prepared cement slurry is injected into the curing device and then cured.

[0067] Specifically, the top cover of the curing tank 31 is opened, the prepared cement slurry is injected into the curing tank 31, and the cement slurry is cured.

[0068] During the curing of cement slurry, the first heating jacket 7 on the outer wall of the curing vessel 31 heats the curing vessel 31 to meet the temperature requirements for cement slurry curing.

[0069] In test step S3, after the cement slurry has cured, the cement slurry is transported to the testing device and the parameters of the test water are tested.

[0070] Specifically, after the cement slurry curing is completed, the on / off valve 10 is opened, and the cement slurry is transported from the curing vessel 31 through the liquid pipeline to the test vessel 21 of the testing device 2. Inside the test vessel 21, the cement slurry falls from the top of the test vessel 21 through the funnel 22 into the test water, and the detection device 23 detects the parameters of the test water.

[0071] The parameters of the water being tested include one or more of the following: conductivity, turbidity, and pH value.

[0072] The detection device 23 includes at least one detection probe. Each detection probe is disposed inside the test vessel 21, and each detection probe is used to detect a parameter associated with the detection probe. The parameter associated with the detection probe is any one of conductivity, turbidity, and pH value.

[0073] While the first heating jacket 7 heats the curing vessel 31, the second heating jacket 8 and the heating plate 9 simultaneously heat the test vessel 21. Before the cement slurry is delivered into the test vessel 21, the second heating jacket 8 and the heating plate 9 heat the test vessel 21 to the required temperature according to the temperature at which the performance of the cement slurry needs to be evaluated, thereby evaluating the performance of the cement slurry at that temperature.

[0074] Evaluation step S4: Evaluate the performance of the cement slurry based on the parameters of the tested water.

[0075] Specifically, curves showing the variation of corresponding parameters are plotted based on the test water parameters, and the performance of the cement slurry is evaluated. More specifically, when the test water parameter is conductivity, a conductivity variation curve is plotted based on the conductivity of the test water, and the performance of the cement slurry is evaluated based on the conductivity variation curve. When the test water parameter is turbidity, a turbidity variation curve is plotted based on the turbidity of the test water, and the performance of the cement slurry is evaluated based on the turbidity variation curve. When the test water parameter is pH value, a pH value variation curve is plotted based on the pH value of the test water, and the performance of the cement slurry is evaluated based on the pH value variation curve.

[0076] As can be seen, in this embodiment, test water is injected into the testing device through the curing device, and the cement slurry is cured in the curing device. After the cement slurry is cured, it is transported to the test water in the testing device to detect the parameters of the test water. The performance of the cement slurry is evaluated based on the parameters of the test water. This method is simple to operate and can quickly and accurately evaluate the performance of cement slurry, which is convenient for studying the formulation of cement slurry and provides a scientific basis for the formulation optimization design of cement slurry system.

[0077] It should be noted that the cement slurry performance evaluation device and method in this invention are based on the same principle, and related parts can be referred to each other.

[0078] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0079] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0080] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A cement slurry performance evaluation device, characterized in that, include: The device includes a support device (1), a testing device (2), a curing device (3), and a heating device; among which, The curing device (3) is installed on the support device (1) and is used to cure cement slurry; The testing device (2) is set on the support device (1) and connected to the curing device (3), and is used to carry the test water, receive the cement slurry, and detect the parameters of the test water; The heating device is installed on the curing device (3) and the testing device (2) to simultaneously heat the curing device (3) and the testing device (2) to the required temperature; The curing device (3) is placed above the testing device (2). The bottom of the curing device (3) is connected to the top of the testing device (2) through a liquid pipeline so that the cement slurry is transported from the curing device (3) to the testing device (2). The curing device (3) and the testing device (2) are also connected through a gas pipeline (4) so ​​that the pressure inside the curing device (3) and the testing device (2) is balanced. The testing device (2) includes: a testing vessel (21), a funnel (22), and a detection device (23); wherein, The test vessel (21) is disposed on the support device (1), and the top wall of the test vessel (21) is provided with a liquid inlet that communicates with the liquid pipeline, and the side wall of the test vessel (21) near the top is provided with a first communication port that communicates with the gas pipeline (4). The funnel (22) is tunably positioned inside the test vessel (21), and the outlet of the funnel (22) faces the bottom wall of the test vessel (21) to adjust the distance between the outlet of the funnel (22) and the test water, thereby adjusting the distance between the cement slurry and the surface of the test water. The detection device (23) is installed inside the test vessel (21) and is used to detect the parameters of the test water.

2. The cement slurry performance evaluation device according to claim 1, characterized in that, The parameters of the test water include one or more of the following: conductivity, turbidity, and pH value; The detection device (23) includes at least one detection probe; wherein each detection probe is disposed inside the test vessel (21), and each detection probe is used to detect a parameter associated with the detection probe, wherein the parameter associated with the detection probe is any one of conductivity, turbidity, and pH value.

3. The cement slurry performance evaluation device according to claim 1, characterized in that, Also includes: Processing device (5) and acquisition device (6); wherein, The acquisition device (6) is electrically connected to the detection device (23) and is used to acquire the parameters of the test water detected by the detection device (23); The processing device (5) is electrically connected to the acquisition device (6) and is used to plot parameter change curves based on the parameters of the test water and to evaluate the performance of the cement slurry based on the parameter change curves.

4. The cement slurry performance evaluation device according to claim 1, characterized in that, The side wall of the test vessel (21) near the bottom is made of transparent material.

5. The cement slurry performance evaluation device according to claim 1, characterized in that, The curing device (3) includes: a curing tank (31) and a stirring mechanism (32); wherein, The curing vessel (31) is disposed on the support device (1), and the top of the curing vessel (31) is provided with an openable and closable lid; The bottom wall of the curing vessel (31) is provided with a liquid outlet that is connected to the liquid pipeline, and the side wall of the curing vessel (31) near the top is provided with an air inlet (311) and a second connection port that is connected to the air pipeline (4). The stirring mechanism (32) is located inside the curing vessel (31).

6. The cement slurry performance evaluation device according to claim 1, characterized in that, The heating device includes: a first heating jacket (7), a second heating jacket (8), and a heating plate (9); wherein, The first heating sleeve (7) is fitted onto the outer wall of the curing device (3); The second heating sleeve (8) is fitted onto the outer wall of the test device (2); The heating plate (9) is located at the bottom of the test device (2).

7. A method for evaluating the performance of cement slurry using the cement slurry performance evaluation device as described in any one of claims 1 to 6, characterized in that, Includes the following steps: In the injection step, a preset amount of test water is injected into the test device through the curing device; The curing step involves injecting the prepared cement slurry into the curing device and curing the cement slurry. The testing procedure involves delivering the cement slurry to the testing device after the cement slurry has cured, and then testing the parameters of the test water. The evaluation step involves evaluating the performance of the cement slurry based on the parameters of the tested water.

8. The method for evaluating the performance of cement slurry according to claim 7, characterized in that, In the testing steps, the parameters of the test water include one or more of the following: conductivity, turbidity, and pH value; In the evaluation step, the change curves of the corresponding parameters are plotted based on the parameters of the test water, and the performance of the cement slurry is evaluated.

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