Water-based drilling fluid filtrate loss reducer based on modified plantain seed husks and preparation method thereof
A technology of water-based drilling fluid and psyllium seed husk, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as environmental impact, and achieve the effects of increasing temperature resistance, easy promotion, and simple methods
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[0023] The specific preparation method of the present invention comprises the following steps:
[0024] 1. Pretreatment of psyllium seed husk
[0025] (1) Freshly clean the psyllium seed husk with water, put it in an oven, and dry it at 100°C±5°C for 5 hours;
[0026] (2) Pulverize the dried psyllium seed husk with a pulverizer, test with a standard inspection sieve, pulverize to 800 mesh to 1000 mesh, and set aside.
[0027] 2. Preparation of fluid loss control agent for water-based drilling fluid based on modified psyllium seed husk
[0028] (1) Add 60~80g of pretreated psyllium seed husks to a 500mL three-necked flat-bottomed flask, add 6~10g of NaOH, then slowly add 300g of distilled water, stir at a low speed, and heat to 60~ 80°C, continue to stir and react for 40~60min;
[0029] (2) Slowly add 20~30g NaOH to the above reactor, stir slowly until it is completely dissolved, then slowly add 50~80g water, keep the temperature at 30~40°C, and continue stirring for 15~20mi...
Embodiment 1
[0037] Add 60g of pretreated psyllium seed husks into a 500mL three-necked flat-bottomed flask, add 6g of NaOH, then slowly add 300g of distilled water, stir at a low speed, after the NaOH is completely dissolved, heat to 60°C, and continue to stir for 40min; Add 20g of NaOH, stir slowly until it is completely dissolved, then slowly add 50g of water, keep the temperature at 30°C, and continue to stir for 15min; add 20g of 95% ethanol dropwise, after the addition is complete, keep the temperature at 40°C, and stir at a low speed for 30min; weigh Dissolve 10 g of chloroacetic acid in 20 g of 95% ethanol, stir to dissolve it; weigh 6 g of NaOH and dissolve it in 20 g of water, stir to dissolve it, and mix and react to generate sodium chloroacetate; add the sodium chloroacetate solution prepared in the previous step, Keep the temperature at 40°C, and etherify for 100 minutes; add 10 g of hydrophobic nano-calcium carbonate 601#, and continue to stir for 30 minutes; remove the liquid...
Embodiment 2
[0039]Add 70g of pretreated psyllium seed husks into a 500mL three-neck flat-bottomed flask, add 8g of NaOH, then slowly add 300g of distilled water, stir at a low speed, after the NaOH is completely dissolved, heat to 70°C, and continue to stir for 50min; Add 25g of NaOH, stir slowly until it is completely dissolved, then slowly add 70g of water, keep the temperature at 35°C, and continue stirring for 18min; add 30g of 95% ethanol dropwise, after the addition is complete, keep the temperature at 45°C, and stir at a low speed for 40min; weigh Dissolve 15 g of chloroacetic acid in 20 g of 95% ethanol, stir to dissolve it; weigh 8 g of NaOH and dissolve it in 20 g of water, stir to dissolve it, and mix and react to generate sodium chloroacetate; add the sodium chloroacetate solution prepared in the previous step, Keep the temperature at 45°C, and etherify for 100 minutes; add 15g of hydrophobic nano-calcium carbonate 602#, and continue to stir for 30 minutes; remove the liquid ph...
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