Ice crumb anti-agglomerant for ultralow-temperature drilling fluid as well as preparation method and application of ice crumb anti-agglomerant

Abstract

The invention provides an ice crumb anti-agglomerant for ultralow-temperature drilling fluid as well as a preparation method and application of the ice crumb anti-agglomerant. The ice crumb anti-polymerizing agent is prepared from the following raw materials: allyl polyoxyethylene ether, heptamethyltrisiloxane and a Speier catalyst. The mass ratio of the Speier catalyst to the allyl polyoxyethylene ether is (0.1-0.3): 1, and the mass ratio of the allyl polyoxyethylene ether to the heptamethyltrisiloxane is (0.5-1.4): 1; the preparation method of the allyl polyoxyethylene ether comprises the following steps: uniformly mixing allyl alcohol and a catalyst, introducing ethylene oxide, and reacting to obtain the allyl polyoxyethylene ether. The raw material composition and the preparation method of the ice crumb anti-agglomerant are simple, the raw materials are cheap and easy to obtain, and the cost is low; the ice crumb anti-aggregation agent has low temperature resistance, can be applied to dispersing ice crumbs in the polar region drilling process, prevents aggregation of the ice crumbs, and solves the problem of drill jamming caused by aggregation of the ice crumbs in the polar region drilling process.

Description

Technical Field

[0001] The invention relates to the technical field of polar drilling, and in particular to an ice chip anti-agglomeration agent for ultra-low temperature drilling fluid, and a preparation method and application thereof. Background Art

[0002] The Antarctic continent is rich in resources, with as many as 220 types of minerals discovered. During the drilling process in Antarctica, "warm ice" may be encountered. Due to the low brittleness and high viscoelasticity of "warm ice", its drillability is relatively poor. Under the action of rotary cutting force, ice chips may enter a molten state. These molten ice chips are easy to gather in the wellbore, and the water produced by melting may freeze again in local locations of the drill bit, causing complex well accidents such as drill bit sticking.

[0003] However, there is currently no effective method to inhibit ice chip aggregation during polar drilling. Therefore, there is an urgent need to invent an ice chip inhibitor that can effectively inhibit ice chip aggregation to ensure the safety and efficiency of polar drilling operations. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides an ice chip anti-aggregation agent for ultra-low temperature drilling fluid and a preparation method and application thereof. The raw material composition and preparation method of the ice chip anti-aggregation agent of the present invention are simple, the raw materials are cheap and easy to obtain, and the cost is low; the ice chip anti-aggregation agent of the present invention has low temperature resistance, can be used in polar drilling to disperse ice chips, prevent ice chips from aggregating, and solve the problem of ice chip aggregating and drilling stuck during polar drilling.

[0005] The technical solution of the present invention is as follows:

[0006] An ice chip anti-agglomeration agent for ultra-low temperature drilling fluid is prepared from the following raw materials: allyl polyoxyethylene ether, heptamethyl trisiloxane, and Speier catalyst; the mass ratio of the Speier catalyst to the allyl polyoxyethylene ether is 0.1-0.3:1, and the mass ratio of the allyl polyoxyethylene ether to the heptamethyl trisiloxane is 0.5-1.4:1;

[0007] The preparation method of allyl polyoxyethylene ether comprises the steps of: uniformly mixing allyl alcohol and a catalyst, introducing ethylene oxide, and obtaining allyl polyoxyethylene ether through reaction; the mass ratio of the catalyst to the allyl alcohol is 0.1-0.5:1; the mass ratio of the allyl alcohol to the ethylene oxide is 1:1-10.

[0008] Preferably according to the present invention, the mass ratio of allyl polyoxyethylene ether to heptamethyltrisiloxane is 1.2-1.4:1.

[0009] Preferably according to the present invention, the mass ratio of the Speier catalyst to the allyl polyoxyethylene ether is 0.15-0.3:1, preferably 0.18:1.

[0010] Preferably, according to the present invention, in the method for preparing allyl polyoxyethylene ether, the catalyst is sodium allyl alcoholate; the mass ratio of the catalyst to allyl alcohol is 0.1-0.3:1, preferably 0.24:1.

[0011] Preferably according to the present invention, in the preparation method of allyl polyoxyethylene ether, the mass ratio of allyl alcohol to ethylene oxide is 1:1-8, more preferably 1:5.

[0012] According to the preferred method of preparing allyl polyoxyethylene ether of the present invention, the reaction temperature is 60-150°C; the reaction pressure is 0-0.8MPa; the reaction time is 3-10h; and the reaction is carried out under the protection of an inert gas. Further preferably, the inert gas is nitrogen or argon.

[0013] Preferably, in the method for preparing allyl polyoxyethylene ether according to the present invention, the unreacted ethylene oxide is removed from the reaction liquid obtained by the reaction to obtain allyl polyoxyethylene ether.

[0014] Preferably according to the present invention, the Speier catalyst is an isopropanol solution of chloroplatinic acid, wherein the mass ratio of chloroplatinic acid to isopropanol is 0.01-0.1:1, preferably 0.06:1.

[0015] Preferably, according to the present invention, the weight average molecular weight of the ice chip anti-aggregation agent for ultra-low temperature drilling fluid is 400-1000, preferably 565-757.

[0016] The preparation method of the ice chip anti-aggregation agent for ultra-low temperature drilling fluid comprises the steps of: fully mixing and evenly dispersing allyl polyoxyethylene ether and Speier catalyst; adding heptamethyl trisiloxane dropwise, and then obtaining the ice chip anti-aggregation agent through reaction.

[0017] Preferably, according to the present invention, the dropwise addition is carried out under the protection of an inert gas at 40-80° C. with stirring; preferably, the inert gas is nitrogen or argon.

[0018] Preferably, according to the present invention, the reaction temperature is 80-120° C., the reaction time is 4-6 hours, and the reaction is carried out under the protection of an inert gas and with stirring; the inert gas is nitrogen or argon.

[0019] Preferably, according to the present invention, the reaction solution obtained by the reaction is subjected to rotary evaporation to remove isopropanol and unreacted heptamethyltrisiloxane to obtain an ice chip anti-agglomeration agent.

[0020] The above-mentioned ice chip anti-agglomeration agent for ultra-low temperature drilling fluid is applied to polar drilling fluid to disperse ice chips in the polar drilling process.

[0021] Preferably according to the present invention, the polar region is the South Pole or the North Pole; and the temperature of the drilling fluid is (-55)-0°C.

[0022] Preferably, according to the present invention, the mass of the ice chip anti-agglomeration agent is 0.5-2.0% of the mass of the polar drilling fluid.

[0023] The technical features and beneficial effects of the present invention are as follows:

[0024] 1. The raw material composition and preparation method of the ice chip anti-agglomeration agent of the present invention are simple, the raw materials are safe, cheap and easy to obtain, and the cost is low.

[0025] 2. The present invention allows allyl alcohol and ethylene oxide to undergo a polymerization reaction, and by controlling the reaction conditions, allyl polyoxyethylene ether with a suitable molecular weight is obtained, and then the allyl polyoxyethylene ether is subjected to a silylation reaction with heptamethyltrisiloxane to obtain an ice chip anti-aggregation agent, which can effectively inhibit the aggregation of ice chips during polar drilling at an addition amount of 0.5%. This is because the ice chip anti-aggregation agent has a strong adsorption group, which can still be adsorbed on the surface of ice chips even at ultra-low temperatures, thereby changing the surface properties of ice chips, greatly reducing the interfacial tension between the "quasi-liquid layer" on the surface of ice chips and the drilling fluid, and then reducing the adhesion between ice chips, thereby inhibiting the aggregation of ice chips.

[0026] 3. The ice chip anti-aggregation agent for ultra-low temperature drilling fluid of the present invention can meet the requirements of being used at the ultra-low temperature of -55°C in the polar regions, has low temperature resistance, and can be used in polar drilling processes to disperse ice chips, prevent ice chips from aggregating, and solve the problem of ice chip aggregation and drill jamming during polar drilling processes.

[0027] 4. In the preparation method of allyl polyoxyethylene ether of the present invention, the raw material ratio, catalyst addition, reaction temperature and other conditions are relatively important. If the reaction conditions are not suitable, the molecular weight of the synthesized allyl polyoxyethylene ether will be too large or too small, which will lead to the inappropriate molecular weight of the final ice chip anti-aggregation agent. Only when the molecular weight of the ice chip anti-aggregation agent is moderate can the aggregation of ice chips be effectively inhibited. The molecular weight is too large, resulting in the inability of the ice chip anti-aggregation agent to effectively dissolve in the ultra-low temperature drilling fluid. The molecular weight is too small, which will make the ice chip anti-aggregation agent unable to effectively adsorb on the surface of the ice chips and thus unable to effectively change the surface properties of the ice chips, and thus unable to effectively inhibit the aggregation of ice chips. In the raw material composition of the present invention, the ratio of allyl polyoxyethylene ether, heptamethyl trisiloxane and Speier catalyst needs to be appropriate. If it is not appropriate, the anti-aggregation effect of the anti-aggregation agent in inhibiting ice chips and / or the dispersibility in the ultra-low temperature drilling fluid will be reduced. DETAILED DESCRIPTION

[0028] The present invention will be further described below by means of specific examples, but is not limited thereto.

[0029] The experimental methods described in the examples are conventional methods unless otherwise specified; the reagents and materials used are commercially available unless otherwise specified.

[0030] Example 1

[0031] A method for preparing an ice chip anti-agglomeration agent for ultra-low temperature drilling fluid comprises the following steps:

[0032] 1) Add 1000g of allyl alcohol and 240g of sodium allyl alcohol catalyst to a high temperature and high pressure reactor, start stirring and introduce nitrogen for 20 minutes, raise the temperature to 110°C, then introduce 5000g of ethylene oxide, and pressurize to 0.4MPa for 7h. Remove the unreacted ethylene oxide in the reactor, and wait for the product to cool to obtain allyl polyoxyethylene ether;

[0033] 2) 40.8 g of allyl polyoxyethylene ether was placed in a three-necked flask, and 7.344 g of Speier catalyst (isopropanol solution of chloroplatinic acid, wherein the mass ratio of chloroplatinic acid to isopropanol was 0.06:1) was added, the magnetic stirrer was turned on, nitrogen was introduced for 20 minutes, and the temperature was raised to 60° C. and kept constant, and then 34 g of heptamethyltrisiloxane was added dropwise with a dropping funnel. After the addition was completed, the temperature was raised to 110° C. and stirred for reaction for 5 h. After cooling to room temperature, the isopropanol and the unreacted heptamethyltrisiloxane were removed by rotary evaporation to obtain an ice chip anti-agglomeration agent.

[0034] Example 2

[0035] A method for preparing an ice chip anti-agglomeration agent for ultra-low temperature drilling fluid comprises the following steps:

[0036] 1) Add 1000g of allyl alcohol and 300g of sodium allyl alcohol catalyst to a high temperature and high pressure reactor, start stirring, introduce nitrogen for 20 minutes, raise the temperature to 105°C, then introduce 5000g of ethylene oxide, and pressurize to 0.4MPa for 7h. Remove the unreacted ethylene oxide in the reactor, and wait for the product to cool to obtain liquid allyl polyoxyethylene ether;

[0037] 2) 40.8 g of allyl polyoxyethylene ether was placed in a three-necked flask, and 6.12 g of Speier catalyst (isopropanol solution of chloroplatinic acid, wherein the mass ratio of chloroplatinic acid to isopropanol was 0.06:1) was added, the magnetic stirrer was turned on, nitrogen was introduced for 20 minutes, and the temperature was raised to 60° C. and kept constant, and then 29.14 g of heptamethyltrisiloxane was added dropwise with a dropping funnel. After the addition was completed, the temperature was raised to 110° C. and stirred for reaction for 5 h. After cooling to room temperature, the isopropanol and the unreacted heptamethyltrisiloxane were removed by rotary evaporation to obtain an ice chip anti-agglomeration agent.

[0038] Example 3

[0039] A method for preparing an ice chip anti-agglomeration agent for ultra-low temperature drilling fluid comprises the following steps:

[0040] 1) Add 1000g of allyl alcohol and 240g of sodium allyl alcohol catalyst to a high temperature and high pressure reactor, start stirring and introduce nitrogen for 20 minutes, raise the temperature to 110°C, then introduce 8000g of ethylene oxide, and pressurize to 0.4MPa for 8h. Remove the unreacted ethylene oxide in the reactor, and wait for the product to cool to obtain allyl polyoxyethylene ether;

[0041] 2) 40.8 g of allyl polyoxyethylene ether was placed in a three-necked flask, and 7.344 g of Speier catalyst (isopropanol solution of chloroplatinic acid, wherein the mass ratio of chloroplatinic acid to isopropanol was 0.06:1) was added, the magnetic stirrer was turned on, nitrogen was introduced for 20 minutes, and the temperature was raised to 60° C. and kept constant, and then 34 g of heptamethyltrisiloxane was added dropwise with a dropping funnel. After the addition was completed, the temperature was raised to 100° C. and stirred for reaction for 4 hours. After cooling to room temperature, the isopropanol and the unreacted heptamethyltrisiloxane were removed by rotary evaporation to obtain an ice chip anti-agglomeration agent.

[0042] Example 4

[0043] A method for preparing an ice chip anti-agglomeration agent for ultra-low temperature drilling fluid comprises the following steps:

[0044] 1) Add 1000g of allyl alcohol and 180g of sodium allyl alcohol catalyst to a high temperature and high pressure reactor, start stirring and introduce nitrogen for 20 minutes, raise the temperature to 100°C, then introduce 3000g of ethylene oxide, and pressurize to 0.4MPa for 6h. Remove the unreacted ethylene oxide in the reactor, and wait for the product to cool to obtain allyl polyoxyethylene ether;

[0045] 2) 40.8 g of allyl polyoxyethylene ether was placed in a three-necked flask, and 9.792 g of Speier catalyst (isopropanol solution of chloroplatinic acid, wherein the mass ratio of chloroplatinic acid to isopropanol was 0.06:1) was added, the magnetic stirrer was turned on, nitrogen was introduced for 20 minutes, and the temperature was raised to 70° C. and kept constant, and then 40.8 g of heptamethyltrisiloxane was added dropwise with a dropping funnel. After the addition was completed, the temperature was raised to 110° C. and stirred for reaction for 5 hours. After cooling to room temperature, the isopropanol and the unreacted heptamethyltrisiloxane were removed by rotary evaporation to obtain an ice chip anti-agglomeration agent.

[0046] Example 5

[0047] A method for preparing an ice chip anti-agglomeration agent for ultra-low temperature drilling fluid is as described in Example 1, except that the amount of allyl polyoxyethylene ether is 40.8 g, the mass ratio of heptamethyltrisiloxane to allyl polyoxyethylene ether is 1.8:1, and the reaction temperature is 80°C. The other steps and conditions are the same as in Example 1.

[0048] Example 6

[0049] A method for preparing an ice chip anti-agglomeration agent for ultra-low temperature drilling fluid is as described in Example 1, except that the amount of allyl polyoxyethylene ether used is 40.8 g, and the mass ratio of allyl polyoxyethylene ether to Speier catalyst is 1:0.3; the other steps and conditions are the same as in Example 1.

[0050] Example 7

[0051] A method for preparing an ice chip anti-agglomeration agent for ultra-low temperature drilling fluid is as described in Example 1, except that: the amount of allyl alcohol used is 1000g, the mass ratio of allyl alcohol to sodium allyl alcohol is 1:0.1, and the mass ratio of allyl alcohol to ethylene oxide is 1:1; other steps and conditions are the same as in Example 1.

[0052] Comparative Example 1

[0053] A method for preparing an ice chip anti-agglomeration agent for ultra-low temperature drilling fluid is as described in Example 1, except that: the amount of allyl alcohol used is 1000g, and the mass ratio of allyl alcohol to sodium allyl alcohol is 1:0.65; the other steps and conditions are the same as in Example 1.

[0054] Comparative Example 2

[0055] A method for preparing an ice chip anti-agglomeration agent for ultra-low temperature drilling fluid is as described in Example 1, except that: the amount of allyl alcohol used is 1000g, and the mass ratio of allyl alcohol to ethylene oxide is 1:15; the other steps and conditions are the same as in Example 1.

[0056] Comparative Example 3

[0057] A method for preparing an ice chip anti-agglomeration agent for ultra-low temperature drilling fluid is as described in Example 1, except that the amount of allyl polyoxyethylene ether is 40.8 g, and the mass ratio of allyl polyoxyethylene ether to Speier catalyst is 1:0.05; the other steps and conditions are the same as in Example 1.

[0058] Comparative Example 4

[0059] A method for preparing an ice chip anti-agglomeration agent for ultra-low temperature drilling fluid is as described in Example 1, except that the amount of allyl polyoxyethylene ether is 40.8 g, the mass ratio of heptamethyltrisiloxane to allyl polyoxyethylene ether is 1:2.7, and the other steps and conditions are the same as in Example 1.

[0060] Comparative Example 5

[0061] A method for preparing an ice chip anti-agglomeration agent for ultra-low temperature drilling fluid is as described in Example 1, except that heptamethyltrisiloxane is replaced by tetramethyldisiloxane, and the other steps and conditions are the same as those in Example 1.

[0062] Comparative Example 6

[0063] A method for preparing an ice chip anti-agglomeration agent for ultra-low temperature drilling fluid is as described in Example 1, except that step (2) is omitted and step (1) is the same as Example 1 to obtain allyl polyoxyethylene ether.

[0064] Test Example 1

[0065] The molecular weight (weight average molecular weight) and yield (total yield) of the ice chip anti-aggregation agent for ultra-low temperature drilling fluid prepared in the example were tested, and the results are shown in Table 1.

[0066] Table 1 Molecular weight and yield of ice chip anti-agglomeration agent for ultra-low temperature drilling fluid

[0067]

[0068]

[0069] It can be seen from the data in Table 1 that the molecular weight of the ice chip anti-agglomeration agent obtained in the present invention is between 406 and 757, and the yield can reach 87.9%.

[0070] Test Example 2

[0071] The ice anti-agglomeration agent prepared in the embodiment and the comparative example was added to the ultra-low temperature drilling fluid. The formula of the ultra-low temperature drilling fluid was aviation kerosene + weighting agent HFC-141b (content 25wt%) + 1.0wt% ice anti-agglomeration agent. The dispersion of the ice anti-agglomeration agent in the drilling fluid and the performance of the ice anti-agglomeration agent were tested. The test results are shown in Table 2.

[0072] The dispersion of ice chip anti-agglomeration agent in drilling fluid can be obtained by observation. The performance of ice chip anti-agglomeration agent is carried out in an ultra-low temperature ice chip aggregation measuring instrument, which mainly evaluates the performance of ice chip anti-agglomeration agent by measuring the torque during ice chip aggregation and recording the aggregation process. The test temperature is -0.5℃.

[0073] Table 2 Anti-aggregation performance of ice chip anti-aggregation agent for ultra-low temperature drilling fluid

[0074]

[0075]

[0076] It can be seen from the data in Table 2 that the ice chip inhibitor can effectively inhibit the aggregation of ice chips only when the molecular weight is moderate. If the molecular weight is too large, the ice chip inhibitor cannot be effectively dissolved in the ultra-low temperature drilling fluid. If the molecular weight is too small, the ice chip inhibitor cannot be effectively adsorbed on the surface of the ice chips, thereby failing to effectively change the surface properties of the ice chips and thus failing to effectively inhibit the aggregation of ice chips.

[0077] Test Example 3

[0078] The ice chip anti-agglomeration agent for ultra-low temperature drilling fluid prepared in Example 2 was added to the ultra-low temperature drilling fluid. The formula of the ultra-low temperature drilling fluid system was aviation kerosene + weighting agent HFC-141b (content 25wt%) + 3wt% shearing agent (organic soil) + 1wt% wetting agent (sodium dodecyl sulfate). The effect of 1wt% ice chip anti-agglomeration agent on the performance of the drilling fluid was measured. The results are shown in Table 3.

[0079] Table 3 Ultra-low temperature drilling fluid properties

[0080]

[0081] It can be seen from Table 3 that the ice chip inhibitor has good compatibility with the drilling fluid system at ultra-low temperatures.

[0082] In summary, the ultra-low temperature drilling fluid ice chip anti-aggregation agent of the present invention can meet the needs of polar drilling.

[0083] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0084] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0085] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An ice chip anti-agglomeration agent for ultra-low temperature drilling fluid, characterized in that: The method comprises the following raw materials: allyl polyoxyethylene ether, heptamethyl trisiloxane, and a Speier catalyst; the mass ratio of the Speier catalyst to the allyl polyoxyethylene ether is 0.1-0.3:1, and the mass ratio of the allyl polyoxyethylene ether to the heptamethyl trisiloxane is 0.5-1.4:1; The preparation method of allyl polyoxyethylene ether comprises the steps of: uniformly mixing allyl alcohol and a catalyst, introducing ethylene oxide, and obtaining allyl polyoxyethylene ether through reaction; the mass ratio of the catalyst to the allyl alcohol is 0.1-0.5:1; the mass ratio of the allyl alcohol to the ethylene oxide is 1:1-10.

2. The ice chip anti-agglomeration agent for ultra-low temperature drilling fluid according to claim 1, characterized in that: Includes one or more of the following conditions: i. The mass ratio of allyl polyoxyethylene ether to heptamethyltrisiloxane is 1.2-1.4:1; ii. The mass ratio of Speier catalyst to allyl polyoxyethylene ether is 0.15-0.3:1, preferably 0.18:

1.

3. The ice chip anti-agglomeration agent for ultra-low temperature drilling fluid according to claim 1, characterized in that: In the preparation method of allyl polyoxyethylene ether, the catalyst is sodium allyl alcohol; the mass ratio of the catalyst to allyl alcohol is 0.1-0.3:1, preferably 0.24:

1.

4. The ice chip anti-agglomeration agent for ultra-low temperature drilling fluid according to claim 1, characterized in that: In the preparation method of allyl polyoxyethylene ether, the mass ratio of allyl alcohol to ethylene oxide is 1:1-8, and more preferably 1:

5.

5. The ice chip anti-agglomeration agent for ultra-low temperature drilling fluid according to claim 1, characterized in that: Includes one or more of the following conditions: i. In the preparation method of allyl polyoxyethylene ether, the reaction temperature is 60-150°C; the reaction pressure is 0-0.8MPa; the reaction time is 3-10h; the reaction is carried out under the protection of an inert gas; further preferably, the inert gas is nitrogen or argon; ii. In the preparation method of allyl polyoxyethylene ether, unreacted ethylene oxide is removed from the reaction solution to obtain allyl polyoxyethylene ether.

6. The ice chip anti-agglomeration agent for ultra-low temperature drilling fluid according to claim 1, characterized in that: The Speier catalyst is an isopropanol solution of chloroplatinic acid, wherein the mass ratio of chloroplatinic acid to isopropanol is 0.01-0.1:1, preferably 0.06:

1.

7. The ice chip anti-agglomeration agent for ultra-low temperature drilling fluid according to claim 1, characterized in that: The weight average molecular weight of the ice chip anti-aggregation agent for ultra-low temperature drilling fluid is 400-1000, preferably 565-757.

8. The method for preparing an ice chip anti-aggregation agent for ultra-low temperature drilling fluid according to any one of claims 1 to 7, comprising the steps of: fully mixing and evenly dispersing allyl polyoxyethylene ether and Speier catalyst; adding heptamethyltrisiloxane dropwise, and then reacting to obtain the ice chip anti-aggregation agent.

9. The method for preparing the ice chip anti-agglomeration agent for ultra-low temperature drilling fluid according to claim 8, characterized in that: Includes one or more of the following conditions: i. The dropwise addition is carried out under inert gas protection, at 40-80° C., with stirring; preferably, the inert gas is nitrogen or argon; ii. The reaction temperature is 80-120°C, the reaction time is 4-6h, and the reaction is carried out under the protection of inert gas and stirring; the inert gas is nitrogen or argon; iii. The reaction solution obtained by the reaction is subjected to rotary evaporation to remove isopropanol and unreacted heptamethyltrisiloxane to obtain an ice chip anti-agglomeration agent.

10. Use of the ice chip anti-aggregation agent for ultra-low temperature drilling fluid as claimed in any one of claims 1 to 7, applied to polar drilling fluid to disperse ice chips during polar drilling; Preferably, the polar region is the South Pole or the North Pole; the temperature of the drilling fluid is (-55)-0°C; Preferably, the mass of the ice chip anti-agglomeration agent is 0.5-2.0% of the mass of the polar drilling fluid.

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