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Hydrocarbon-based drilling fluid Invention provides environmentally safe hydrocarbon-based drilling fluid suitable for use during boring and completion of oil and gas wells. Drilling fluid is characterized by required viscosity and structural properties within a wide water content range and, in particular, contains, wt %: castor oil 50.0-83.0, colophony calcium resinate (thickener) 4.0, calcium chloride 10.0, Neonol AF-9/12 (emulsifier) 0-0.3, organophilic bentonite 2.0-3.0, water 0-30.0, and penosoline (waterproofing agent) 0-20. |
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Hydrophobic emulsion designed as fluid for killing of oil and gas wells and as grouting mortar or water-insulation fluid contains 25.0-40.0% of degassed crude oil from Allakaevo oilfield and water (the rest). |
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Well completion and pullout composition Composition 61.0-68.9% petroleum or petroleum processing product, 2.0-4.7% natural fatty acid, 2.1-4.0% sodium hydroxide, and natural calcium carbonate with particle size 2 to 50 μm - the rest. Natural fatty acid employs vegetable and animal fat production waste. |
Another patent 2542040.