Solid oil well cement paste retarder and preparation method thereof

Abstract

The invention discloses a solid oil well cement slurry retarder and a preparation method thereof, and relates to the technical field of preparation of oilfield chemical assistants, the retarder is prepared by fully mixing and grinding the following raw materials: a component A and a component B, the component A comprises a stabilizer, tartaric acid and polyose; the component B is hydrotalcite and sodium chloride; the component A comprises the following raw materials in parts by weight: 3-8 parts of a stabilizer; 2-5 parts by weight of tartaric acid; 1 part by weight of polyose; the weight ratio of the hydrotalcite to the sodium chloride is (30-35): 1; the weight ratio of the component A to the component B is 1: (1-1.5). The retarder is a solid retarder after inorganic and organic hybridization, has the characteristics of efficient adsorption of organic materials and filling and enhancement of inorganic materials, is good in stability and excellent in performance, is expected to solve the technical problem of large-temperature-difference well cementation of cement paste, and improves the stability and the use universality of the retarder.

Description

Technical Field

[0001] The invention relates to the technical field of preparation of oilfield chemical additives, and more particularly to a solid oil well cement slurry retarder and a preparation method thereof. Background Art

[0002] With the strategic layout of energy development, oil and gas exploration and development are developing in multiple fields, including conventional oil and gas, unconventional oil and gas, polar deep water and new energy fields. The application conditions are also facing many challenges. The research on oil well cement admixtures with inorganic and organic hybridization as the trend is mainly to transform from traditional polymers to two-phase hybrid materials. For oil well cement retarders, inorganic functional materials are introduced to hybridize organic functional groups to replace the traditional contact mode of polymers: the direct contact mode of admixture functional groups is changed to non-contact mode, which improves the adaptability of retarders under high temperature and high pressure conditions; it is expected to solve the problems of poor stability of the retarder itself, no linear relationship in thickening time and slow development of top strength. In addition, the retarder itself needs to cope with high temperature, high cold and convenient storage application conditions. The commonly used retarders are mainly liquids. Large-scale use has problems such as high transportation cost, difficulty in mixing and poor stability. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a solid oil well cement slurry retarder and a preparation method thereof. The retarder of the present invention is a solid retarder after inorganic and organic hybridization, which takes into account the characteristics of efficient adsorption of organic materials and filling and enhancement of inorganic materials, has good stability and excellent performance, and is expected to solve the technical problem of cement slurry with large temperature difference cementing, and improve the stability of the retarder itself and the wide application.

[0004] One of the purposes of the present invention is to provide a solid oil well cement slurry retarder.

[0005] The solid oil well cement slurry retarder of the present invention is prepared by fully mixing and grinding raw materials including the following components:

[0006] Component A and component B;

[0007] The component A comprises: a stabilizer, tartaric acid and polysaccharides;

[0008] The component B is hydrotalcite and sodium chloride;

[0009] The raw materials of component A are calculated by weight:

[0010] 3-8 parts by weight of stabilizer;

[0011] 2-5 parts by weight of tartaric acid;

[0012] 1 part by weight of polysaccharide;

[0013] The weight ratio of the hydrotalcite to sodium chloride is (30-35):1;

[0014] The weight ratio of component A to component B is 1:(1-1.5).

[0015] Preferably,

[0016] The raw materials of each component of component A are calculated by weight parts:

[0017] Stabilizer 4-6 weight parts;

[0018] Tartaric acid 3-4 weight parts;

[0019] Polysaccharide 1 weight part;

[0020] The weight ratio of the hydrotalcite to sodium chloride is (31-33):1;

[0021] The weight ratio of component A to component B is 1:(1.1-1.3).

[0022] Preferably,

[0023] The stabilizer is dextrin, preferably white dextrin or yellow dextrin; and / or,

[0024] The tartaric acid is L-tartaric acid or D-tartaric acid; tartaric acid mainly exists in the fruits of various plants in the form of potassium salts, and there is also a small amount in the free state. Industrially, it is usually prepared by fermenting glucose. In the actual application field, D-tartaric acid is mainly used; and / or,

[0025] The polysaccharide is at least one of sodium glucoheptonate, sodium gluconate, and chitosan; and / or,

[0026] The hydrotalcite is calcium-aluminum hydrotalcite or magnesium-aluminum hydrotalcite.

[0027] Preferably,

[0028] The hardness of the calcium-aluminum hydrotalcite is 3.5-4, and / or, the density is 2.7-2.8 g / cm 3 ; and / or,

[0029] The hardness of the magnesium-aluminum hydrotalcite is 3.5-4, and / or, the density is 2.7-2.8 g / cm 3 .

[0030] The second object of the present invention is to provide a preparation method of a solid oil well cement slurry retarder.

[0031] The preparation method of the solid oil well cement slurry retarder described in the present invention includes:

[0032] After the stabilizer, tartaric acid and polysaccharide are mixed and ground once, they are mixed and ground a second time together with hydrotalcite, sodium chloride and grinding aid to obtain the retarder.

[0033] The grinding aid is a solid grinding aid or a liquid grinding aid;

[0034] Preferably,

[0035] The solid grinding aid is fly ash, preferably fly ash with a particle size of 0.5 - 300 μm and a porous structure; and / or,

[0036] The liquid grinding aid is triethanolamine;

[0037] More preferably,

[0038] When the grinding aid is a solid grinding aid, the weight ratio of the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite and sodium chloride to the weight of the solid grinding aid is 30:(1 - 5), preferably 30:(2 - 4); and / or,

[0039] When the grinding aid is a liquid grinding aid, the weight ratio of the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite and sodium chloride to the weight of the liquid grinding aid is 30:(0.2 - 0.8), preferably 30:(0.3 - 0.5).

[0040] Preferably,

[0041] The diameter of the material after the first mixing and grinding is 180 - 200 mesh.

[0042] Preferably,

[0043] The grinding material used for the second mixing and grinding is spherical zirconia. Preferably, the diameter of the spherical zirconia is 3 - 8 mm.

[0044] Preferably,

[0045] The ratio of the grinding material used for the second mixing and grinding to the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite and sodium chloride is (6 - 8):1.

[0046] Preferably,

[0047] The second mixing and grinding adopts the planetary ball milling method.

[0048] Preferably,

[0049] The planetary ball milling parameters are: 240 - 260 r / min, 30 min × (4 - 6), with forward and reverse rotations alternating.

[0050] Specifically, the following scheme can be adopted:

[0051] Component A: stabilizer, tartaric acid and polysaccharide are dry-mixed and ground; then they are added to a planetary ball mill together with hydrotalcite, sodium chloride and grinding aid for dry-mixing and loading. The ball-milling material is spherical zirconia with a diameter of 3 - 8 mm. The planetary ball-milling method is adopted at 240 - 260 r / min for 30 min × (4 - 6). The ratio of the grinding material to the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite and sodium chloride is (6 - 8):1, and it alternates between forward and reverse rotation.

[0052] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0053] The retarder of the present invention is a solid retarder after inorganic-organic hybridization, with good stability and hydrophilicity. It can be dry-mixed or wet-mixed, can adapt to the requirements of different external environmental changes, has a small dosage and high efficiency, good temperature resistance, can meet the experimental requirements at 160 °C, and has a small difference in the thickening experiment of parallel samples.

[0054] The use of hydrotalcite has a relatively low price, good thermal stability, can improve the strength of cement stone, and effectively reduces the preparation cost of the retarder; through physical mixing, an effective combination between the functional groups of the retarder and the interlayer of hydrotalcite is achieved; the solid retarder itself has good stability, is not affected by the storage environment and transportation, and can greatly reduce the transportation cost. Description of the Drawings

[0055] Figure 1 It is the scanning electron micrograph of the calcium-aluminum hydrotalcite raw material;

[0056] Figure 2 It is the scanning electron micrograph of the retarder in Example 1;

[0057] Figure 3 It is the cumulative pore volume change diagram of the pore size distribution of the calcium-aluminum hydrotalcite raw material;

[0058] Figure 4 It is the cumulative pore volume change diagram of the pore size distribution of the retarder in Example 1.

[0059] From Figure 1 and Figure 2 the comparison of the scanning electron micrographs, it can be seen that the surface of the hydrotalcite sample has changed, indicating that the organic material of Component A has a surface interaction with the hydrotalcite and forms an effective combination;

[0060] Figure 3 and Figure 4 the cumulative pore volume change is measured by a BET specific surface area tester for the adsorption and desorption of inert gas on the hydrotalcite before and after loading with reference to: Gao Lixin. BET Analysis of Physical Property Characterization of Porous Materials [J], Guangdong Chemical Industry. 2021:13(48);

[0061] From Figure 3 and Figure 4From the comparison of the cumulative pore volume changes, it can be seen that the hydrotalcite shows a tendency of decreasing pore volume due to the loading of the organic material of component A. The decrease in pore volume reflects better loading efficiency, further confirming that the organic material of component A is effectively loaded on the hydrotalcite. Detailed implementation mode

[0062] The present invention will be specifically described below in conjunction with specific embodiments. It is necessary to point out here that the following embodiments are only for further illustration of the present invention and should not be construed as limiting the protection scope of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the content of the present invention still fall within the protection scope of the present invention.

[0063] The G-grade cement in the embodiments of the present invention is purchased from Sichuan Jiahua Cement Factory, the fluid loss reducer 1 is purchased from the fluid loss reducer DZJ-Y of Shandong Dezhou Continental Shelf Auxiliary Factory, dextrin, tartaric acid, sodium glucoheptonate, chitosan and sodium gluconate are all analytical pure drugs provided by the National Pharmaceutical Reagent Company, and the fly ash is purchased from the fly ash SC-FMH of Shandong Dezhou Continental Shelf Auxiliary Factory.

[0064] Example 1

[0065] Weigh 6 parts by weight of yellow dextrin, 4 parts by weight of tartaric acid (D- dextrorotatory), and 1 part by weight of sodium glucoheptonate, put them into a manual mortar, and coarsely grind them to the same particle size, about 200 mesh. Then, together with 0.38 parts by weight of sodium chloride, 2.5 parts by weight of fly ash and 12.5 parts by weight of calcium-aluminum hydrotalcite (hardness 3.5 - 4, density: 2.8 - 2.8 g / cm 3 ) are put into a planetary ball mill (spherical zirconia, 3 - 8 mm). The ball milling parameters are: 250 r / min, 30 min × 4. The ratio of the grinding balls to the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite and sodium chloride is 7:1, and the forward and reverse rotations are alternated to obtain the retarder.

[0066] Example 2

[0067] Weigh 6 parts by weight of yellow dextrin, 4 parts by weight of tartaric acid (D- dextrorotatory), and 1 part by weight of sodium glucoheptonate, put them into a manual mortar, and coarsely grind them to the same particle size, about 200 mesh. Then, together with 0.38 parts by weight of sodium chloride, 2.5 parts by weight of fly ash and 12.5 parts by weight of calcium-aluminum hydrotalcite (hardness 3.5 - 4, density: 2.8 - 2.8 g / cm 3 ) are put into a planetary ball mill (spherical zirconia, 3 - 8 mm). The ball milling parameters are: 260 r / min, 30 min × 4. The ratio of the grinding balls to the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite and sodium chloride is 7:1, and the forward and reverse rotations are alternated to obtain the retarder.

[0068] Example 3

[0069] Weigh 6 parts by weight of yellow dextrin, 4 parts by weight of tartaric acid (D - dextrorotatory), and 1 part by weight of sodium glucoheptonate, put them into a manual mortar, and coarsely grind until the particle sizes are consistent, about 200 mesh, then mix with 0.38 parts by weight of sodium chloride, 2.5 parts by weight of fly ash, and 12.5 parts by weight of calcium - aluminum hydrotalcite (hardness 3.5 - 4, density: 2.8 - 2.8 g / cm 3 ) and put them together into a planetary ball mill (zirconia balls, 3 - 8 mm). The ball - milling parameters are as follows: 240 r / min, 30 min × 4. The ratio of the grinding balls to the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite, and sodium chloride is 7:1, and it alternates between forward and reverse rotation to obtain the retarder.

[0070] Example 4

[0071] Weigh 4 parts by weight of white dextrin, 3 parts by weight of tartaric acid (levorotatory), and 1 part by weight of sodium gluconate, put them into a manual mortar, and coarsely grind until the particle sizes are consistent, about 200 mesh, then mix with 0.38 parts by weight of sodium chloride, 1.3 parts by weight of fly ash, and 11.8 parts by weight of magnesium - aluminum hydrotalcite (hardness 3.5 - 4, density: 2.8 - 2.8 g / cm 3 ) and put them together into a planetary ball mill (zirconia balls, 3 - 8 mm). The ball - milling parameters are as follows: 250 r / min, 30 min × 4. The ratio of the grinding balls to the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite, and sodium chloride is 8:1, and it alternates between forward and reverse rotation to obtain the retarder.

[0072] Example 5

[0073] Weigh 5 parts by weight of white dextrin, 5 parts by weight of tartaric acid (levorotatory), and 1 part by weight of chitosan, put them into a manual mortar, and coarsely grind until the particle sizes are consistent, about 200 mesh, then mix with 0.38 parts by weight of sodium chloride, 3.1 parts by weight of fly ash, and 12.2 parts by weight of magnesium - aluminum hydrotalcite (hardness 3.5 - 4, density: 2.8 - 2.8 g / cm 3 ) and put them together into a planetary ball mill (zirconia balls, 3 - 8 mm). The ball - milling parameters are as follows: 250 r / min, 30 min × 4. The ratio of the grinding balls to the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite, and sodium chloride is 6:1, and it alternates between forward and reverse rotation to obtain the retarder.

[0074] Example 6

[0075] Weigh 4 parts by weight of white dextrin, 3 parts by weight of tartaric acid (levorotatory), and 1 part by weight of sodium gluconate, put them into a manual mortar, and coarsely grind until the particle sizes are consistent, about 200 mesh, then mix with 0.38 parts by weight of sodium chloride, 0.2 parts by weight of triethanolamine, and 11.8 parts by weight of magnesium - aluminum hydrotalcite (hardness 3.5 - 4, density: 2.8 - 2.8 g / cm 3)Put them together into a planetary ball mill (spherical zirconia, 3 - 8 mm). The ball milling parameters are as follows: 250 r / min, 30 min × 4. The ratio of the grinding balls to the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite and sodium chloride is 8:1, and it rotates forward and backward alternately to obtain the retarder.

[0076] Example 7

[0077] Weigh 5 parts by weight of white dextrin, 5 parts by weight of tartaric acid (levorotatory), and 1 part by weight of chitosan, put them into a manual mortar, and roughly grind them to a uniform particle size, about 200 mesh. Then, mix them with 0.38 parts by weight of sodium chloride, 0.4 parts by weight of triethanolamine and 12.2 parts by weight of magnesium-aluminum hydrotalcite (hardness 3.5 - 4, density: 2.8 - 2.8 g / cm 3 )Put them together into a planetary ball mill (spherical zirconia, 3 - 8 mm). The ball milling parameters are as follows: 250 r / min, 30 min × 4. The ratio of the grinding balls to the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite and sodium chloride is 6:1, and it rotates forward and backward alternately to obtain the retarder.

[0078] Comparative Example 1

[0079] Weigh 6 parts by weight of yellow dextrin, 4 parts by weight of tartaric acid (D - dextrorotatory), and 1 part by weight of sodium glucoheptonate, put them into a manual mortar, and roughly grind them to a uniform particle size, about 200 mesh. Then, mix them with 0.38 parts by weight of sodium chloride, 2.5 parts by weight of fly ash and 12.5 parts by weight of calcium-aluminum hydrotalcite (hardness 3.5 - 4, density: 2.8 - 2.8 g / cm 3 )Put them together into a planetary ball mill (spherical zirconia, 3 - 8 mm). The ball milling parameters are as follows: 220 r / min, 30 min × 4. The ratio of the grinding balls to the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite and sodium chloride is 7:1, and it rotates forward and backward alternately to obtain the retarder.

[0080] Comparative Example 2

[0081] Weigh 6 parts by weight of yellow dextrin, 4 parts by weight of tartaric acid (D - dextrorotatory), and 1 part by weight of sodium glucoheptonate, put them into a manual mortar, and roughly grind them to a uniform particle size, about 200 mesh. Then, mix them with 0.38 parts by weight of sodium chloride, 1 part by weight of fly ash and 12.5 parts by weight of calcium-aluminum hydrotalcite (hardness 3.5 - 4, density: 2.8 - 2.8 g / cm 3 )Put them together into a planetary ball mill (spherical zirconia, 3 - 8 mm). The ball milling parameters are as follows: 280 r / min, 30 min × 4. The ratio of the grinding balls to the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite and sodium chloride is 7:1, and it rotates forward and backward alternately to obtain the retarder.

[0082] Comparative Example 3

[0083] Weigh 6 parts by weight of yellow dextrin, 4 parts by weight of tartaric acid (D - dextrorotatory), and 1 part by weight of sodium glucoheptonate, put them into a manual mortar, and coarsely grind until the particle size is consistent, about 200 mesh, then mix with 0.38 parts by weight of sodium chloride, 1 part by weight of fly ash, and 12.5 parts by weight of calcium - aluminum hydrotalcite (hardness 3.5 - 4, density: 2.8 - 2.8 g / cm 3 ) and put them together into a planetary ball mill (zirconia balls, 3 - 8 mm). The ball - milling parameters are as follows: 250 r / min, 30 min×4. The ratio of the grinding balls to the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite, and sodium chloride is 10:1, and it rotates forward and backward alternately to obtain the retarder.

[0084] Comparative Example 4

[0085] Weigh 6 parts by weight of yellow dextrin, 4 parts by weight of tartaric acid (D - dextrorotatory), and 1 part by weight of sodium glucoheptonate, put them into a manual mortar, and coarsely grind until the particle size is consistent, about 200 mesh, then mix with 0.38 parts by weight of sodium chloride, 1 part by weight of fly ash, and 12.5 parts by weight of calcium - aluminum hydrotalcite (hardness 3.5 - 4, density: 2.8 - 2.8 g / cm 3 ) and put them together into a planetary ball mill (zirconia balls, 3 - 8 mm). The ball - milling parameters are as follows: 250 r / min, 30 min×4. The ratio of the grinding balls to the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite, and sodium chloride is 5:1, and it rotates forward and backward alternately to obtain the retarder.

[0086] Add the retarders prepared in the examples into the cement slurry system respectively for the performance evaluation of high - temperature and high - pressure thickening parallel samples. The test method for oil - well cement is carried out according to GB / T19139 - 2012:

[0087] Test Example 1

[0088] Oil - well cement slurry system:

[0089] G - grade cement (100 parts), silica fume (35 parts), fluid - loss additive 1 (5 parts), retarder (0 part), tap water (53 parts).

[0090] Test Example 2

[0091] Oil - well cement slurry system:

[0092] G - grade cement (100 parts), silica fume (35 parts), fluid - loss additive 1 (5 parts), retarder prepared in Example 1 (1.5 parts), tap water (53 parts).

[0093] Test Example 3

[0094] Oil - well cement slurry system:

[0095] Class G cement (100 parts), silica fume (35 parts), fluid loss additive 1 (5 parts), retarder prepared in Example 2 (1.5 parts), tap water (53 parts).

[0096] Test Example 4

[0097] Oil well cement slurry system:

[0098] Class G cement (100 parts), silica fume (35 parts), fluid loss additive 1 (5 parts), retarder prepared in Example 3 (1.5 parts), tap water (53 parts).

[0099] Test Example 5

[0100] Oil well cement slurry system:

[0101] Class G cement (100 parts), silica fume (35 parts), fluid loss additive 1 (5 parts), retarder prepared in Example 4 (1.5 parts), tap water (53 parts).

[0102] Test Example 6

[0103] Oil well cement slurry system:

[0104] Class G cement (100 parts), silica fume (35 parts), fluid loss additive 1 (5 parts), retarder prepared in Example 5 (1.5 parts), tap water (53 parts).

[0105] Test Example 7

[0106] Oil well cement slurry system:

[0107] Class G cement (100 parts), silica fume (35 parts), fluid loss additive 1 (5 parts), retarder prepared in Example 6 (1.5 parts), tap water (53 parts).

[0108] Test Example 8

[0109] Oil well cement slurry system:

[0110] Class G cement (100 parts), silica fume (35 parts), fluid loss additive 1 (5 parts), retarder prepared in Example 7 (1.5 parts), tap water (53 parts).

[0111] Test Example 9

[0112] Oil well cement slurry system:

[0113] Class G cement (100 parts), silica fume (35 parts), fluid loss additive 1 (5 parts), retarder prepared in Comparative Example 1 (1.5 parts), tap water (53 parts).

[0114] Test Example 10

[0115] Oil well cement slurry system:

[0116] Class G cement (100 parts), silica fume (35 parts), fluid loss reducer 1 (5 parts), retarder prepared in Comparative Example 2 (1.5 parts), tap water (53 parts).

[0117] Test Example 11

[0118] Oil well cement slurry system:

[0119] Class G cement (100 parts), silica fume (35 parts), fluid loss reducer 1 (5 parts), retarder prepared in Comparative Example 3 (1.5 parts), tap water (53 parts).

[0120] Test Example 12

[0121] Oil well cement slurry system:

[0122] Class G cement (100 parts), silica fume (35 parts), fluid loss reducer 1 (5 parts), retarder prepared in Comparative Example 4 (1.5 parts), tap water (53 parts).

[0123] The test results are shown in Table 1:

[0124] Table 1

[0125]

[0126] It can be found from the test results that: the preparation method of the solid oil well cement retarder is very important. In order to meet the requirement of thickening time under high temperature conditions, the uniformity of the sample is very important. Through experiments, it is found that the physical and chemical properties and application properties of the final product retarder are different with different preparation parameters. For the cement slurry parallel samples in Example 1 with reasonable preparation parameters, the thickening times are basically the same, with good repeatability, and the color and particle size of the prepared retarder are uniform; Examples 2-7 are samples prepared with variable preparation parameters. The thickening times of the cement slurry parallel samples vary, and there are also slight differences in appearance and particle uniformity. The change of raw material types has little effect on the thickening time, but the change of the addition amount of the key retarder substance will still cause the change of the thickening time. The type of grinding aid has a greater impact on the thickening time. The grinding aid effect of triethanolamine is better than that of fly ash, but triethanolamine will cause the shortening of the thickening time, while the impact of fly ash on the thickening time is smaller; for the products prepared with other parameters in Comparative Examples 1-4, the parallel test differences in the thickening performance of the cement slurry are obvious, and the color and particle size uniformity of the retarder are difficult to meet the requirements of on-site applications.

Claims

1. A solid oil well cement slurry retarder, characterized in that The retarder is prepared by fully mixing and grinding raw materials including the following components: Component A and Component B; Component A includes: a stabilizer, tartaric acid, and a polysaccharide; Component B is hydrotalcite and sodium chloride; For each component raw material in Component A, by weight: The stabilizer is 3 - 8 parts by weight; Tartaric acid is 2 - 5 parts by weight; The polysaccharide is 1 part by weight; The weight ratio of the hydrotalcite to the sodium chloride is (30 - 35):1; The weight ratio of Component A to Component B is 1:(1 - 1.5).

2. The solid oil well cement slurry retarder according to claim 1, wherein: For each component raw material in Component A, by weight: The stabilizer is 4 - 6 parts by weight; Tartaric acid is 3 - 4 parts by weight; The polysaccharide is 1 part by weight; The weight ratio of the hydrotalcite to the sodium chloride is (31 - 33):1; The weight ratio of Component A to Component B is 1:(1.1 - 1.3).

3. The solid oil well cement slurry retarder according to claim 1, wherein: The stabilizer is dextrin, preferably white dextrin or yellow dextrin; and / or, The tartaric acid is L-tartaric acid or D-tartaric acid; and / or, The polysaccharide is at least one of sodium glucoheptonate, sodium gluconate, and chitosan; and / or, The hydrotalcite is calcium-aluminum hydrotalcite or magnesium-aluminum hydrotalcite.

4. The solid oil well cement slurry retarder according to claim 3, wherein: The hardness of the calcium-aluminum hydrotalcite is 3.5 to 4, and / or the density is 2.7 to 2.8 g / cm 3 ; and / or The hardness of the magnesium aluminum hydrotalcite is 3.5 to 4, and / or the density is 2.7 to 2.8 g / cm 3 .

5. A preparation method of the solid oil well cement slurry retarder according to any one of claims 1-4, characterized in that The method includes: After Component A is mixed and ground once, it is mixed and ground a second time together with Component B and a grinding aid to obtain the retarder.

6. The preparation method according to claim 5, wherein: The grinding aid is a solid grinding aid or a liquid grinding aid; Preferably, The solid grinding aid is fly ash, preferably fly ash with a particle size of 0.5 - 300 μm and a porous structure; and / or, The liquid grinding aid is triethanolamine; More preferably, When the grinding aid is a solid grinding aid, the weight ratio of the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite, and sodium chloride to the weight of the solid grinding aid is 30:(1 - 5), preferably 30:(2 - 4); and / or, When the grinding aid is a liquid grinding aid, the weight ratio of the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite, and sodium chloride to the weight of the liquid grinding aid is 30:(0.2 - 0.8), preferably 30:(0.3 - 0.5).

7. The preparation method according to claim 5, wherein: The diameter of the material after the first mixing and grinding is 180 - 200 mesh.

8. The preparation method according to claim 5, wherein: The grinding material used for the second mixing and grinding is spherical zirconia, preferably with a diameter of 3 - 8 mm.

9. The preparation method of the solid oil well cement slurry retarder according to claim 5, wherein: The ratio of the grinding material used for the second mixing and grinding to the total weight of the stabilizer, tartaric acid, polysaccharide, hydrotalcite, and sodium chloride is (6 - 8):

1.

10. The preparation method of the solid oil well cement slurry retarder according to claim 5, wherein: The second mixing and grinding adopts a planetary ball milling method; Preferably, the planetary ball milling parameters are: 240 - 260 r / min, 30 min × (4 - 6), with forward and reverse rotations alternating.

Images