LUBRICANT ADDITIVE "BIOLUB LVL" FOR DRILLING MUD Russian patent published in 2007 - IPC C09K8/35 

FIELD: oil and gas holes drilling.

SUBSTANCE: invention relates to lubricant additives for drilling mud. Proposed lubricant additive drilling mud comprising natural higher fatty acid, lower monoatomic (C₂-C₅)-alcohol and/or oligomeric polyethylene glycol with the polymerization degree n = 2-5, and/or oligomeric polypropylene glycol with value n = 1-3 contains additionally oxal, alkaline metal hydroxide and/or carbonate, and/or mono-, di-, triethanolamine, sulfonated fish oil in the ratio indicated acids : sulfonated fish oil = (99:1)-(1:99) in the following ratio of components of the additive, wt.-%: indicated acids and sulfonated fish oil, 70-90.9; alkaline metal hydroxide and/or carbonate, and/or mono-, di-, triethanolamine, 1-8; oxal, 5-25; indicated alcohol, polyethylene glycol, polypropylene glycol, 1-24. Invention proves enhancing effectiveness of the lubricant additive in clay and clay-free drilling mud.

EFFECT: enhanced effectiveness and improved properties of additive.

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