Emulsion oil-based

SANDS Low pressure. Water or mud blocking. Loss of crude or diesel oil used as completion fluid. Minimum filtration rate water-base muds. Minimum filtration rate water-base emulsions. Miminum filtration rate oU-base emulsions. Oil-base muds. Inhibited muds. Minimum weight muds. Crude oil or diesel oil. Add oil-soluble lost circulation material. 

The water-in-oil or invert emulsion oil-based drilling fluids provide much of the required rheological and fluid loss properties. The emulsion is stabilized by the use of emulsifiers that prevent the coalescence of the droplets and formation of separated phases (56, 57). Figure 5 shows the chemical structure of the two emulsifiers that are commonly used... 

Figure 5. Common emulsifiers used in invert emulsion oil-based drilling fluids.

Figure 9. Experimental and predicted rheograms for invert emulsion oil-based drilling fluids. Rheograms collected at 600 bar hydrostatic pressure and various temperatures (shown in degrees centigrade). (Reproduced with permission from reference 69. Copyright 1986 Society of Petroleum Engineers.)...

Figure 48. Comparison of rates offiltration of an invert emulsion oil-based drilling fluid under static and various dynamic conditions. 1. vm = 0 (extrapolated static filtration rate) 2. vm = 0.6 m/s 3. vm = 1.5 m/s 4. vm = 2.9 m/s. (Reproduced with permission from reference 142. Copyright 1954 American Institute of Mechanical Engineers.)...

The approach outlined previously is also applicable to the aqueous phase in an invert emulsion oil-based drilling fluid. The chemical potential of the water in the aqueous (dispersed) phase is usually controlled by the concentration of calcium chloride. The transport of water between the shale and the aqueous phase of the invert emulsion is less complex than with water-based drilling fluids, because with the emulsions there is no cation exchange between the ions in the fluid and in the shale. The thin emulsified layer surrounding the water droplets is postulated to act as a semipermeable membrane that allows only the passage of water (61). 

BYK -306 Disparlon AQ-261 Disperbyk -190 Disponil SUS 1C 865 Disponil SUS 1C 875 Dow Corning 57 Additive Edaplan 470 Edaplan 472 Edaplan 480 Edaplan 482 EFKA -3034 EFKA -3522 EFKA -3580 Fluorad FC-4430 GP-217 Silicone Polyol Copolymer GP-226 Silicone Polyol Copolymer GP-484 Silicone Polyol Copolymer GP-490 Silicone Polyol Copolymer GP-491 Silicone Polyol Copolymer GP-492 Silicone Polyol Copolymer GP-645 Silicone Polyol Copolymer Flauthane FIA-504 Hauthane HA-508 Hydropalat 110 Hydropalat 130 Hydropalat 215 Hydropalat 225 Hydropalat 600 Hydropalat 3216 Hydropalat 3275 Ken-React QB 012 Ken-React QB 321 Ken-React QB 521 PEG-1.3 tetramethyl decynediol PEG-10 tetramethyl decynediol PEG-30 tetramethyl decynediol, Surfynol 420 Surfynol 465 Surfynol 485 Sutfynol EP-810 Surfynol EP-830 wetting agent, ag. emulsions oil-based ingreds. 

Uses Wetting agent, emulsifier, dispersant, solubilizer, penetrant used in emulsion and suspension polymerization, pigment dispersion, o/w and w/o emulsions, oil-based lubricants, adhesives, penetrating oils, and agric. pesticides food-pkg. adhesives, paper/paperboard emulsifier in mfg. of food-contact articles vise. 

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