Cement paste performance evaluation device and method

Abstract

The invention provides a cement paste performance evaluation device and method. The device comprises a supporting device, a testing device, a maintaining device and a heating device, the curing device is arranged on the supporting device and used for curing the cement paste; the testing device is arranged on the supporting device, is communicated with the maintenance device and is used for bearing the testing water, receiving the cement paste and detecting parameters of the testing water; the heating device is arranged on the maintenance device and the testing device and used for heating the maintenance device and the testing device to the required temperature. According to the invention, the parameter change curve is drawn according to the parameters of water so as to evaluate the performance of the cement paste, and the heating device heats the curing device and the testing device, so that not only can the temperature required by the curing device for curing the cement paste be met, but also the parameters of water can be detected at different temperatures; furthermore, the performance of the cement paste at different temperatures can be quickly and accurately evaluated, a basis is provided for optimizing the formula of the cement paste, and the application range of the evaluation device is expanded.

Description

Technical Field

[0001] The present invention relates to the technical field of cement slurry, and in particular to a cement slurry performance evaluation device and method. Background Art

[0002] At present, in many oil fields at home and abroad that have entered the late stage of development, the dilution, dissolution migration and mass exchange of cement slurry by formation water during cementing directly affect the solidification process of cement slurry, destroy the design performance of cement slurry, and form a crossflow channel between the cement ring and the formation, resulting in reduced cementing quality or even cementing operation failure. In view of the water invasion problem that is prone to occur during the cementing process of high-water-content oil and gas wells, targeted research on cement slurry has been carried out. Through the research of anti-dispersion materials, non-dispersible cement slurry is formed to avoid the scouring and dilution of cement slurry by formation water during the waiting process, thus ensuring the sealing integrity of the cement ring.

[0003] In order to better guide the optimal design of water-non-dispersible cement slurry formula, it is necessary to evaluate the water intrusion resistance of cement slurry. However, the existing water intrusion resistance evaluation method is carried out in the low temperature range below 100°C, but it is impossible to evaluate the water intrusion resistance in the high temperature range above 100°C. Summary of the invention

[0004] In view of this, the present invention proposes a cement slurry performance evaluation device, aiming to solve the problem in the prior art that the anti-water intrusion performance of cement slurry in a high temperature range above 100° C. The present invention also proposes a cement slurry performance evaluation method.

[0005] In one aspect, the present invention proposes a cement slurry performance evaluation device, which includes: a supporting device, a testing device, a curing device and a heating device; wherein the curing device is arranged on the supporting device and is used to cure the cement slurry; the testing device is arranged on the supporting device and is 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 arranged on the curing device and the testing device, and is used to heat the curing device and the testing device to a required temperature.

[0006] Furthermore, in the above-mentioned cement slurry performance evaluation device, the maintenance device is placed above the testing device, and the bottom of the maintenance device is connected to the top of the testing device through a liquid pipeline so that the cement slurry is transported from the maintenance device to the testing device, and the maintenance device and the testing device are also connected through an air pipeline so that the pressure in the maintenance device and the testing device is balanced.

[0007] Furthermore, in the above-mentioned cement slurry performance evaluation device, the test device includes: a test kettle, a funnel and a detection device; wherein the test kettle is arranged on the supporting device, and the top wall of the test kettle is provided with a liquid inlet connected to the liquid pipeline, and the side wall of the test kettle near the top is provided with a first connecting port connected to the gas pipeline; the funnel is adjustably arranged in the test kettle, and the liquid outlet of the funnel faces the bottom wall of the test kettle; the detection device is arranged in the test kettle for detecting the parameters of the test water.

[0008] Furthermore, in the above-mentioned cement slurry performance evaluation device, the parameters of the test water include: one or more of conductivity, turbidity, and pH value; the detection device includes: at least one detection probe; wherein each detection probe is arranged in the test kettle, and each detection probe is used to detect a 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 above-mentioned 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 draw a parameter change curve according to the parameters of the test water, and evaluate the performance of the cement slurry according to the parameter change curve.

[0010] Furthermore, in the above-mentioned cement slurry performance evaluation device, the side wall of the test kettle near the bottom is made of transparent material.

[0011] Furthermore, in the above-mentioned cement slurry performance evaluation device, the curing device includes: a curing kettle and a stirring mechanism; wherein the curing kettle is arranged on the supporting device, and the top of the curing kettle is provided with an openable and closable cover; the bottom wall of the curing kettle is provided with a liquid outlet connected to the liquid pipeline, and the side wall of the curing kettle near the top is provided with an air inlet and a second connecting port connected to the air pipeline; the stirring mechanism is arranged in the curing kettle.

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

[0013] In the present invention, the curing device cures cement slurry, and the testing device is connected to the curing device. The testing device transports the cured cement slurry into test water, detects the parameters of the test water, and draws a parameter change curve according to the parameters of the test water, thereby evaluating the performance of the cement slurry. The heating device heats the curing device and the testing device, which can not only meet the temperature required by the curing device for the production and curing of cement slurry, but also detect the parameters of the test water at different temperatures, thereby quickly and accurately evaluating the performance of the cement slurry at different temperatures, providing a basis for optimizing the formula of the cement slurry, expanding the use scope of the evaluation device, and solving the problem in the prior art that the water intrusion resistance of the cement slurry in the high temperature range above 100°C cannot be evaluated.

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

[0015] Furthermore, in the above-mentioned cement slurry performance evaluation method, in the testing step, the parameters of the test water include: one or more of conductivity, turbidity, and pH value; in the evaluation step, a change curve of the corresponding parameters is drawn according to the parameters of the test water, and the performance of the cement slurry is evaluated.

[0016] In the present invention, test water is injected into the testing device through the curing device, cement slurry is cured in the curing device, and after the cement slurry is cured, the cement slurry is transported to the test water of the testing device, the parameters of the test water are detected, and the performance of the cement slurry is evaluated according to the parameters of the test water. The method is simple to operate, can quickly and accurately evaluate the performance of the cement slurry, is convenient for optimizing the formula of the cement slurry, and provides a scientific basis for the formula optimization design of the cement slurry system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

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

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

[0020] Figure 3 A flow chart of a cement slurry performance evaluation method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] Device Example:

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

[0024] The test device 2 is arranged on the support device 1, and the test device 2 is connected to the curing device 3. The test device 2 is used to carry the test water and receive the cured cement slurry delivered by the curing device 3. Then, the cement slurry falls into the test water in the test device 2, and the test device 2 also detects the parameters of the test water. According to the detected parameters of the test water, a parameter change curve is drawn, and according to the parameter change curve, the performance of the cement slurry is quantitatively evaluated. Specifically, the test water can be deionized water. The water intrusion resistance of the cement slurry can be evaluated according to the parameter change curve, and other properties of the cement slurry can also be evaluated according to actual needs. This embodiment does not impose any restrictions on this.

[0025] The heating device is arranged on the curing device 3 and the testing device 2, and 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 synchronously. When the curing device 3 cures 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 to the testing device 2, the heating device heats the testing device 2 to a desired temperature to evaluate the performance of the cement slurry at the desired temperature.

[0027] It can be seen that in the present 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 into the test water, detects the parameters of the test water, and draws a parameter change curve according to the parameters of the test water, thereby evaluating the performance of the cement slurry. The heating device heats the curing device 3 and the testing device 2, which can not only meet the temperature required by the curing device 3 for curing the cement slurry, but also detect the parameters of the test water at different temperatures, thereby quickly and accurately evaluating the performance of the cement slurry at different temperatures, providing a basis for optimizing the formula of the cement slurry, expanding the scope of use of the evaluation device, and solving the problem in the prior art that the water intrusion resistance of the cement slurry in the high temperature range above 100°C cannot be evaluated.

[0028] See also Figure 1 In the above embodiment, the maintenance device 3 is placed above the test device 2, and the maintenance device 3 and the test device 2 are arranged up and down. The bottom of the maintenance device 3 and the top of the test device 2 are arranged opposite to each other, and the bottom of the maintenance device 3 and the top of the test device 2 are connected through a liquid pipeline, so that the cement slurry is transported from the maintenance device 3 to the test device 2 through the liquid pipeline. Specifically, an on-off valve 10 is provided on the liquid pipeline, and the on-off valve 10 controls the on-off of the liquid pipeline. In specific implementation, the on-off valve 10 can be a ball valve.

[0029] The maintenance device 3 and the test device 2 are also connected through an air pipeline 4, and the air pipeline 4 is used to balance the pressure in the maintenance device 3 with the pressure in the test device 2. Specifically, a first valve 14 is provided on the air pipeline 4, and the first valve 14 controls the on-off of the air pipeline 4, and the first valve 14 is in a normally open state.

[0030] Preferably, at least one gas pipeline 4 is provided between the maintenance device 3 and the testing device 2 to ensure that the pressure in the maintenance device 3 is balanced with the pressure in the testing device 2 .

[0031] See also Figure 1 The support device 1 includes: a base 11, a support column 12 and a plurality of support rods 13. The support column 12 is vertically arranged on the base 11, and the test device 2 is arranged on the base 11 and placed on one side of the support column 12. Each support rod 13 is arranged along the height direction of the support column 12 ( Figure 1The support rods 13 are arranged at intervals (in the direction from top to bottom as shown), and each support rod 13 is detachably connected to the test device 2 and the maintenance device 3. 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 the test device 2 or the maintenance device 3, so that the test device 2 is not only arranged on the base 11 but also fixed by multiple support rods 13, and the maintenance device 3 is placed above the test device 2. In order to ensure the stability of the maintenance device 3, the maintenance device 3 is connected to the support column 12 through multiple support rods 13.

[0032] The testing device 2 includes: a testing kettle 21, a funnel 22 and a detection device 23. The testing kettle 21 is arranged on the supporting device 1, specifically, the bottom of the testing kettle 21 is arranged on the base 11, and the side of the testing kettle 21 facing the supporting column 12 is detachably connected to the plurality of supporting rods 13.

[0033] The interior of the test kettle 21 is hollow, and a liquid inlet is provided on the top wall of the test kettle 21, and the liquid inlet is connected to the liquid pipeline. A first connecting port is provided on the side wall of the test kettle 21 near the top, and the first connecting port is connected to the gas pipeline 4. An air outlet 211 is also provided on the side wall of the test kettle 21 near the top, and the air outlet 211 is connected to the air outlet pipeline, and a second valve 15 is provided on the air outlet pipeline, and a safety valve is also provided on the air outlet pipeline. The air outlet 211 is used for pressure relief, and when the pressure in the test kettle 21 is too high, the air outlet 211 can automatically open to relieve pressure.

[0034] The position of the funnel 22 is adjustable in the test kettle 21, and the liquid outlet of the funnel 22 faces the bottom wall of the test kettle 21. Specifically, the position of the funnel 22 in the test kettle 21 is adjustable to adjust the distance between the liquid outlet of the funnel 22 and the test water, that is, to adjust the distance between the cement slurry and the test water surface. When the distance is different, the test result of the cement slurry is also different. In addition, the setting of the funnel 22 can facilitate the control of the flow rate of the cement slurry falling into the test water, thereby facilitating the evaluation of the performance of the cement slurry.

[0035] The funnel 22 may include: a liquid inlet section 221, a conical section 222 and a liquid outlet section 223 connected in sequence; wherein the cross-sectional shape of the liquid inlet section 221 matches the cross-sectional shape of the test kettle 21, and the outer diameter of the liquid inlet section 221 is slightly smaller than the inner diameter of the test kettle 21. The larger end of the conical section 222 is connected to the liquid inlet section 221, and the smaller end of the conical section 222 is connected to the liquid outlet section 223, and the outer diameter of the liquid outlet section 223 is smaller than the outer diameter of the liquid inlet section 221. The liquid inlet section 221 is connected to the test kettle 21 in an adjustable position, and the liquid outlet section 223 is closer to the bottom wall of the test kettle 21 than the liquid 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 provided with a thread, the inner wall of the test kettle 21 is provided with a thread, the funnel 22 is screwed with the test kettle 21, and the position of the funnel 22 in the test kettle 21 is adjusted by twisting the funnel 22. Specifically, the outer wall of the liquid inlet section 221 in the funnel 22 is provided with a thread, and the liquid inlet section 221 is screwed with the inner wall of the test kettle 21. In specific implementation, in order to facilitate twisting the funnel 22, the bottom wall of the test kettle 21 can be set to an openable and closable structure, that is, the bottom wall of the test kettle 21 is connected to the side wall of the test kettle 21 in an openable and closable manner, so that the bottom wall of the test kettle 21 is opened, and the funnel 22 can be twisted, that is, the position of the funnel 22 can be adjusted.

[0037] Preferably, the side wall of the test kettle 21 near the bottom is made of transparent material, so that it is 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 specific implementation, the material of the test kettle 21 can be at least one of iron, stainless steel, glass, and resin, wherein the glass or resin is a transparent material.

[0039] The detection device 23 is arranged in the test kettle 21, and is used to detect the parameters of the test water, wherein the parameters of the test water include: one or more of conductivity, turbidity, and pH value.

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

[0041] In specific implementation, the detection probe is arranged near the bottom of the test kettle 21 and placed in the test water, and the material of the test kettle 21 below the detection probe is transparent. In specific implementation, the material of the test kettle 21 below the detection probe is glass, and the material above the detection probe can be stainless steel.

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

[0043] The processing device 5 is electrically connected to the collection device 6, and the processing device 5 is used to receive the parameters of the test water sent by the collection device 6, draw a parameter change curve according to the parameters of the test water, and evaluate the performance of the cement slurry according to the parameter change curve. Specifically, when the detection device 23 detects the conductivity of the test water, the processing device 5 draws a conductivity change curve according to the conductivity of the test water, and evaluates the performance of the cement slurry according to the conductivity change curve. When the detection device 23 detects the turbidity of the test water, the processing device 5 draws a turbidity change curve according to the turbidity of the test water, and evaluates the performance of the cement slurry according to the turbidity change curve. When the detection device 23 detects the pH value of the test water, the processing device 5 draws a pH value change curve according to the pH value of the test water, and evaluates the performance of the cement slurry according to the pH value change curve.

[0044] See also Figure 1 In the above embodiments, the curing device 3 includes: a curing kettle 31 and a stirring mechanism 32. The curing kettle 31 is arranged on the supporting device 1. Specifically, the curing kettle 31 is placed above the test kettle 21, and the curing kettle 31 is connected to the test kettle 21 through a quick connector 17. The curing kettle 31 is detachably connected to the plurality of support rods 13 on one side facing the support column 12.

[0045] The top of the curing kettle 31 ( Figure 1 Specifically, the top of the curing kettle 31 is open, and the cover is connected to the top of the curing kettle 31 in an openable manner. The top of the curing kettle 31 is closed by the cover or the top of the curing kettle 31 is opened, so that the material can be injected into the curing kettle 31.

[0046] The bottom wall of the curing kettle 31 is provided with a liquid outlet, which is connected to the liquid pipeline. The side wall of the curing kettle 31 near the top is provided with a second connecting port, which is connected to the gas pipeline 4, and the first valve 14 is arranged near the second connecting port. The side wall of the curing kettle 31 near the top is also provided with an air inlet 311, which is connected to the air inlet pipeline, and the third valve 16 is arranged on the air inlet pipeline, and the air inlet pipeline is connected to the air source to adjust the pressure in the curing kettle 31. Specifically, the air source can be a nitrogen source or other gas, and this embodiment does not impose any limitation on this.

[0047] In specific implementation, according to the pressure required for evaluating the performance of cement slurry, air of preset pressure is delivered to the curing kettle 31 through an air source to adjust the pressure in the curing kettle 31, thereby evaluating the performance of cement slurry at the required pressure.

[0048] The stirring mechanism 32 is disposed in the curing kettle 31 , and is used to stir the cement slurry cured in the curing kettle 31 to ensure that the cement slurry is evenly heated.

[0049] Preferably, the stirring mechanism 32 includes: a motor 321, a stirring shaft 322 and a plurality of stirring blades 323. The motor 321 is placed outside the curing kettle 31, and the motor 321 is connected to the support column 12 through the support rod 13. The driving end of the motor 321 is connected to the first end ( Figure 1 The stirring shaft 322 is rotatably disposed through the cover and the top of the curing kettle 31. The second end ( Figure 1 The stirring blades 323 are arranged at intervals on the part where the stirring shaft 322 is placed in the curing tank 31.

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

[0051] See also 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 sleeved on the outer wall of the curing device 3, that is, on the outer wall of the curing kettle 31. The second heating sleeve 8 is sleeved on the outer wall of the testing device 2, that is, on the outer wall of the testing kettle 21.

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

[0053] In a specific implementation, the first heating sleeve 7 , the second heating sleeve 8 and the heating plate 9 are all electrically heated, and the curing kettle 31 and the testing kettle 21 can be heated when power is supplied.

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

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

[0056] During specific implementation, the components of the cement slurry performance evaluation device are well sealed, the pressure resistance can reach 2MPa, and the temperature range is from room temperature to 200°C.

[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 into the test water, detects the parameters of the test water, and draws a parameter change curve according to the parameters of the test water, thereby evaluating the performance of the cement slurry. The heating device heats the curing device 3 and the testing device 2, which can not only meet the temperature required by the curing device 3 for the production and curing of the cement slurry, but also detect the parameters of the test water at different temperatures, thereby quickly and accurately evaluating the performance of the cement slurry at different temperatures, that is, realizing a simple and rapid evaluation of the performance of different cement slurry formulas according to the actual required temperature. The device has a simple structure and a wide operating temperature range, providing a scientific basis for the formula optimization design of the cement slurry system.

[0058] Method Example:

[0059] This embodiment also proposes a cement slurry performance evaluation method using any of the above cement slurry performance evaluation devices, see Figure 3 , the cement slurry performance evaluation method comprises the following steps:

[0060] Injection step S1, injecting a preset amount of test water into the test device through the maintenance device.

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

[0062] See also 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, and an on-off valve 10 is provided on the liquid pipeline.

[0063] The test device 2 includes: a test kettle 21, a funnel 22 and a detection device 23. The top wall of the test kettle 21 is provided with a liquid inlet connected to the liquid pipeline, the funnel 22 is adjustably arranged in the test kettle 21, and the liquid outlet of the funnel 22 faces the bottom wall of the test kettle 21. The detection device 23 is arranged in the test kettle 21 to detect the parameters of the test water.

[0064] The curing device 3 comprises a curing kettle 31 and a stirring mechanism 32. The top of the curing kettle 31 is provided with an openable cover, the bottom wall of the curing kettle 31 is provided with a liquid outlet connected to the liquid pipeline, and the stirring mechanism 32 is arranged in the curing kettle 31.

[0065] Before injecting the test water, both the test device 2 and the curing device 3 are in an empty state. The cover on the top of the curing kettle 31 is opened, so that the top of the curing kettle 31 is in an open state, 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 kettle 31, and the test water is transported to the test device 2 after passing through the curing kettle 31 and the liquid pipeline. After the test water is injected, the on-off valve 10 is closed, and the cover on the top of the curing kettle 31 is closed.

[0066] Production step S2, injecting the prepared cement slurry into a curing device, and curing the cement slurry.

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

[0068] When curing cement slurry, the first heating jacket 7 on the outer wall of the curing kettle 31 heats the curing kettle 31 to meet the curing temperature of the cement slurry.

[0069] Test step S3, after the cement slurry curing is completed, the cement slurry is transported to the testing device and the parameters of the test water are tested.

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

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

[0072] The detection device 23 includes: at least one detection probe, wherein each detection probe is arranged in the test kettle 21, and each detection probe is used to detect a parameter associated with the detection probe, and the parameter associated with the detection probe is any one of conductivity, turbidity, and pH value.

[0073] When the first heating jacket 7 heats the curing kettle 31, the second heating jacket 8 and the heating plate 9 simultaneously heat the test kettle 21. Before the cement slurry is conveyed into the test kettle 21, the second heating jacket 8 and the heating plate 9 heat the test kettle 21 to the required temperature according to the temperature required to evaluate the performance of the cement slurry, so as to evaluate the performance of the cement slurry at the temperature.

[0074] Evaluation step S4, evaluating the performance of the cement slurry according to the parameters of the test water tested.

[0075] Specifically, a change curve of the corresponding parameter is drawn according to the parameter of the test water, and the performance of the cement slurry is evaluated. More specifically, when the parameter of the test water is conductivity, a conductivity change curve is drawn according to the conductivity of the test water, and the performance of the cement slurry is evaluated according to the conductivity change curve. When the parameter of the test water is turbidity, a turbidity change curve is drawn according to the turbidity of the test water, and the performance of the cement slurry is evaluated according to the turbidity change curve. When the parameter of the test water is pH value, a pH value change curve is drawn according to the pH value of the test water, and the performance of the cement slurry is evaluated according to the pH value change curve.

[0076] It can be seen that in this embodiment, test water is injected into the testing device through the curing device, the cement slurry is cured in the curing device, and after the cement slurry is cured, the cement slurry is transported to the test water of the testing device, the parameters of the test water are detected, and 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 the cement slurry, is convenient for studying the formula of the cement slurry, and provides a scientific basis for the formula optimization design of the cement slurry system.

[0077] It should be noted that the principles of the cement slurry performance evaluation device and method in the present invention are the same, and relevant parts can be referenced to each other.

[0078] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0079] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0080] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A cement slurry performance evaluation device, characterized in that: include: A supporting device (1), a testing device (2), a curing device (3) and a heating device; wherein: The curing device (3) is arranged on the supporting device (1) and is used for curing cement slurry; The testing device (2) is arranged on the supporting device (1) and is connected to the curing device (3), and is used to carry the testing water, receive the cement slurry, and detect the parameters of the testing water; The heating device is arranged on the curing device (3) and the testing device (2) and is used to heat the curing device (3) and the testing device (2) to a required temperature.

2. The cement slurry performance evaluation device according to claim 1, characterized in that: The curing device (3) is placed above the testing device (2), and the bottom of the curing device (3) is connected to the top of the testing device (2) via a liquid pipeline, so that the cement slurry is transported from the curing device (3) to the testing device (2), and the curing device (3) and the testing device (2) are also connected via a gas pipeline (4) to balance the pressure in the curing device (3) and the testing device (2).

3. The cement slurry performance evaluation device according to claim 2, characterized in that: The testing device (2) comprises: a testing kettle (21), a funnel (22) and a detection device (23); wherein: The test kettle (21) is arranged on the support device (1), and a liquid inlet connected to the liquid pipeline is provided on the top wall of the test kettle (21), and a first communication port connected to the gas pipeline (4) is provided on the side wall near the top of the test kettle (21); The funnel (22) is adjustably arranged in the testing kettle (21), and the liquid outlet of the funnel (22) faces the bottom wall of the testing kettle (21); The detection device (23) is arranged in the test kettle (21) and is used to detect the parameters of the test water.

4. The cement slurry performance evaluation device according to claim 3, characterized in that: The test water parameters include: one or more of conductivity, turbidity, and pH value; The detection device (23) comprises: at least one detection probe; wherein each of the detection probes is arranged in the test kettle (21), and each of the detection probes is used to detect a parameter associated with the detection probe, and the parameter associated with the detection probe is any one of conductivity, turbidity, and pH value.

5. The cement slurry performance evaluation device according to claim 3, characterized in that: Also includes: A processing device (5) and a collection device (6); wherein, The collecting device (6) is electrically connected to the detecting device (23) and is used to collect the parameters of the test water detected by the detecting device (23); The processing device (5) is electrically connected to the collecting device (6) and is used to draw a parameter change curve according to the parameters of the test water, and to evaluate the performance of the cement slurry according to the parameter change curve.

6. The cement slurry performance evaluation device according to claim 3, characterized in that: The side wall of the test kettle (21) near the bottom is made of transparent material.

7. The cement slurry performance evaluation device according to claim 2, characterized in that: The curing device (3) comprises: a curing kettle (31) and a stirring mechanism (32); wherein: The curing kettle (31) is arranged on the supporting device (1), and a cover body that can be opened and closed is arranged on the top of the curing kettle (31); The bottom wall of the curing kettle (31) is provided with a liquid outlet connected to the liquid pipeline, and the side wall of the curing kettle (31) close to the top is provided with an air inlet (311) and a second connecting port connected to the air pipeline (4); The stirring mechanism (32) is arranged in the curing kettle (31).

8. The cement slurry performance evaluation device according to claim 1, characterized in that: The heating device comprises: a first heating sleeve (7), a second heating sleeve (8) and a heating plate (9); wherein: The first heating sleeve (7) is sleeved on the outer wall of the curing device (3); The second heating sleeve (8) is sleeved on the outer wall of the testing device (2); The heating plate (9) is arranged at the bottom of the testing device (2).

9. A method for evaluating cement slurry performance using the cement slurry performance evaluation device according to any one of claims 1 to 8, characterized in that: The steps include: an injection step, injecting a preset amount of test water into the test device through the maintenance device; a curing step of injecting the prepared cement slurry into the curing device and curing the cement slurry; A testing step, after the cement slurry is cured, the cement slurry is transported to the testing device, and the parameters of the test water are tested; An evaluation step is to evaluate the performance of the cement slurry according to the tested parameters of the test water.

10. The cement slurry performance evaluation method according to claim 9, characterized in that: In the testing step, the parameters of the test water include: one or more of conductivity, turbidity, and pH value; In the evaluation step, a change curve of the corresponding parameter is drawn according to the parameter of the test water, and the performance of the cement slurry is evaluated.

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