LUBRICATING ADDITIVE FOR DRILLING FLUIDS Russian patent published in 2004 - IPC

FIELD: well boring.

SUBSTANCE: lubricating additive containing triglyceride fatty acids with number of carbon atoms 14-24, neutralization agent, and water additionally contains substituted fatty acid ammonium salts with number of carbon atoms 10-26 to ensure following percentages of ingredients: 50-80% triglyceride fatty acids, 3-6% neutralization agent, 5-40% substituted fatty acid ammonium salts, and water to 100%. Using such additive preserves high characteristics of lubrication properties such as reduction of friction factor on the metal-metal interface, improves antifriction properties such as reduction of coefficient of potential catch-up on metal-clay crust interface in fresh and mineralized drilling fluids, and simultaneously improves surface-active properties of drilling fluid filtrate.

EFFECT: improved performance characteristics.

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