Fluid loss agent for drilling fluid

A fluid loss control agent and drilling fluid technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of high temperature resistance, poor salt resistance, difficult control of drilling fluid properties, etc., and achieve good salt resistance. Effect

Inactive Publication Date: 2012-01-04
卫辉市化工有限公司
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Problems solved by technology

[0002] In the process of oil drilling, the formations encountered are becoming more and more complex, especially in the case of more and more special wells, ultra-deep wells and complex wells. Poor, after increasing the amount of admixture, the visco

Method used

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Embodiment Construction

[0006] The present invention has the following embodiments: a fluid loss reducer for petroleum drilling fluid: 1. first weigh 40 grams of deionized water and put it into the reactor, then add 2 grams of sodium carbonate into the deionized water and stir to dissolve; 2. weigh 5 grams Add 2-acrylamido-dimethylpropenesulfonic acid into the above solution for neutralization, and keep the pH value at 10-12. ③ Pour 15 grams of acrylamide and 0.6 grams of vinylpyrrolidone into the solution, stir to dissolve, then add 0.1 grams of ammonium persulfate and 0.1 grams of sodium persulfate into the solution and stir evenly, then put them in a kneading kettle and keep Observe the reaction at a temperature of 34-38°C, and cure it for 5 hours after polymerization; ④ Pour 2 grams of formaldehyde, 40 grams of sulfonated lignite and 40 grams of sulfomethyl phenolic resin into the kneading kettle, stir evenly, take out the polymer material and put it Dry on the drying equipment at 100-105°C, crus...

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Abstract

The invention discloses a fluid loss agent for drilling fluid. A preparation method comprises the following steps of: adding 40g of deionized water into a reaction kettle, adding 2g of sodium carbonate into the kettle, stirring to dissolve the sodium carbonate, adding 5g of 2-acrylamide-2-methylpropenesulfonic acid into the solution for neutralization, pouring 15g of acrylamide and 0.6g of vinyl pyrrolidone into the neutralized solution in turn, stirring for dissolution, adding 0.1g of ammonium persulfate and 0.1g of sodium hydrogen persulfate into the solution in turn, stirring uniformly, transferring the solution to a kneading kettle for polymerization, pouring 2g of formaldehyde, 40g of sulfonated lignite and 40g of sulfomethylated phenolic resin into the kneading kettle, stirring uniformly, taking a polymerized material out, drying on drying equipment, crushing, and sieving by using an 80-mesh sieve. The fluid loss agent is suitable for various water base drilling fluids, high temperature deep wells and salt layers, and has the advantages of high temperature resistance and high salt resistance.

Description

Technical field: [0001] The invention relates to the control of drilling fluid properties, in particular to a drilling fluid fluid loss reducer with high temperature resistance and salt resistance. Background technique: [0002] In the process of oil drilling, the formations encountered are becoming more and more complex, especially in the case of more and more special wells, ultra-deep wells and complex wells. Poor, after increasing the amount of admixture, the viscosity will also increase, especially in the case of high calcium and magnesium ion content, the performance of drilling fluid is more difficult to control, the existing fluid loss control agent for drilling fluid can no longer meet the needs of drilling . Invention content: [0003] The object of the present invention is to provide a drilling fluid fluid loss reducer with good performance of high temperature resistance and salt resistance. [0004] The technical scheme of the present invention is accomplished...

Claims

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Application Information

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IPC IPC(8): C09K8/03C08F220/56
Inventor 梁艳丽耿强李新芬董世志许磊卢甲晗
Owner 卫辉市化工有限公司
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