Preparation method of linkage reducer for drilling fluid
A technology of drilling fluid and loss, which is applied in the direction of drilling compositions, chemical instruments and methods, etc. It can solve problems such as low drilling fluid loss, difficult adjustment and control, etc., and achieve strong loss reduction and salt resistance. strong effect
Inactive Publication Date: 2012-01-11
陆明富
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Problems solved by technology
Under high temperature conditions, various components in the drilling fluid will undergo changes such as degradation, fermentation, thickening and failure, which will cause drastic changes in the performance of the drilling fluid, and it is difficult to adjust and control; and with high formation pressure, The drilling fluid must have a high density, resulting in a high solids content in the drilling fluid
In this case, the possibility of downhole complex situations such as differential pressure sticking, lost circulation, and blowout will greatly increase, and it will be more difficult to maintain good rheology and low loss of drilling fluid. At this time, conventional drilling Fluid can no longer meet the requirements of drilling engineering
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0007] The invention provides a preparation method of a loss-loss reducing agent for drilling fluid, which comprises the following steps: step 1, dissolving 2-acrylamido-2-methylpropanesulfonic acid in 600L of water, and using 48% potassium hydroxide Neutralize the solution, adjust the pH value to 4-5, then add 31.9kg of acrylamide, and after it dissolves, add 12.6kg of vinyl acetate;
[0008] Step 2, first heat up the mixed solution after the reaction in step 1 to 35°C, then add 0.075kg of ammonium persulfate and 0.075kg of sodium bisulfite to the mixed solution, stir the mixed solution evenly and place it in a sealed container at 35±1°C Place it in the environment for 1-2 hours, and finally get a gel-like product; the product is granulated by shearing, dried at 100-120°C, and pulverized to get the product.
[0009] Quality Index
[0010] project
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The invention discloses a preparation method of linkage reducer for drilling fluid, which comprises the following steps: step 1, dissolving 2-propylene amido-2-methyl propanesulfonic acid into 600L of water, neutralizing by 48% of potassium hydroxide solution, regulating the pH value to 4-5, then adding 31.9kg of acrylamide, dissolving and then adding 12.6kg of vinyl acetate; step 2, adding 0.075 kg of ammonium persulfate and 0.075 kg of sodium bisulfite in a mixed solution from a step 1, uniformly stirring the mixed solution and then placing in sealed environment for a while to obtain a gel product finally; cutting the products and granulating, drying at the temperature of 100-120 DEG C, crushing to obtain the product. According to the invention, the linkage reducer has strong salt resistance capability, and has linkage resistance effect to fresh water drilling fluid, saturated salt water drilling fluid and artificial seawater drilling fluid, and is suitable for a deep well and a saturated salt water drilling fluid system.
Description
technical field [0001] The invention relates to a preparation method of a loss reduction agent for drilling fluid. Background technique [0002] In oil drilling, due to the increase of well depth, the bottom of the well is under high temperature and high pressure conditions, the drilling section is long and there are large sections of open holes, and many complex formations must be drilled, so the operating conditions are much harsher than ordinary wells, so Higher requirements are also put forward for the performance of drilling fluid. Under high temperature conditions, various components in the drilling fluid will undergo changes such as degradation, fermentation, thickening and failure, which will cause drastic changes in the performance of the drilling fluid, and it is difficult to adjust and control; and with high formation pressure, The drilling fluid must have a high density, resulting in a high solid content in the drilling fluid. In this case, the possibility of d...
Claims
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Inventor 陆明富
Owner 陆明富