Neodirect-emul

Emulsifier of oil-in-water emulsions

20.59.59-204-14023401-2018

Neodirect-emul direct emulsifier is a composition based on polyalkylene glycols (block copolymers of ethylene and propylene oxides) and polyglycerides of fatty acids.

The form of delivery of Neodirect-emul is determined by the agreement with the customer.

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Purpose

Neodirect-emul is used in oil and gas industry in order to create stable direct emulsions in solutions with different hydrocarbon phase content and different mineralization. The surfactant composition is an effective stabilizer of microemulsions based on hydrocarbon oils of various natures.

Advantages

Usage of direct emulsion as a drilling fluid based on Neodirect-emul allows:

• to prevent dispersion of clay rocks and improve well cleaning from drilled rock, due to optimal rheological and structural-mechanical parameters of the drilling fluid;

• to increase stability of argillite-clay rocks and reduce the risk of cavings in the process of deepening the well, including during long-term downtime;

• reduce the filtration losses, increase the stability of the drilling fluid over time; • increase the lubricating properties of the drilling fluid.

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Physical and chemical properties

Property

Grade S

Grade R

Appearance

Viscous liquid of light yellow to brown color

pH value, units of pH, max

Freezing point, °С, max

+10

n/a

Recommendations to application

Neodirect-emul grade S emulsifier is recommended to be used for the creation of fresh drilling fluids with a reduced specific gravity when drilling under ALRP conditions, while Neodirect-emul grade R is recommended for the preparation of highly inhibitive fluids based on binary systems, silicate and/or potassium formate brine as a dispersion medium. However, the choice of a specific grade in each case requires an assessment of the conditions: grade S can also be effective for obtaining a mineralized weighted fluid, and grade R for obtaining fresh-water fluid, depending on the composition, the hydrocarbon base used, the mineralization of the medium, etc. For a number of compositions, emulsifiers can be used in conjunction with the Neoinvert-emul Stab co-emulsifier, which is able to increase the stability of direct emulsions in the widest range of mineralization of the aqueous phase (up to saturation) and elevated temperatures. The injection of the emulsifier into the drilling fluid is recommended to be carried out as part of the hydrocarbon phase, after preliminary dissolution in it. The optimal concentration is selected based on the results of preliminary tests, generally it is 0.5-1.5%.