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Organophilic bentonite for oil-based drilling fluids

     Organobentonite, used to modify rheological properties and suspension properties, and to help suspend drilling fluids and transport cuttings out of the well, plays a crucial role in oilfield drilling fluids. Simultaneously, organoclay bentonite effectively lubricates drill bits. In some high-temperature base drilling fluids, organo bentonite can be used in diesel, mineral oil, synthetic oil, and all-oil drilling fluid systems. It also efficiently improves viscosity control and enhances gelation effects.

Grade Selection by Drilling Fluid System | organophilic bentonite for oil-based drilling fluids

The organophilic clay selection chart identifies suitable grades for four major oil-based drilling fluid systems:

  • Diesel-solvent-based mud
  • Mineral-oil-based mud
  • Synthetic-oil-based mud
  • All-oil systems
organophilic bentonite for oil-based drilling fluids

In the chart, “+” means recommended and “–” means not suitable.

GradeDiesel Solvent

Mineral

Oil

Synthetic Oil

All-Oil

System

Main Characteristics
CP-2ERecommendedNot suitableNot suitableNot suitableDiesel-based mud viscosifier up to 350°F; economical
CP-982RecommendedNot suitableNot suitableNot suitableDiesel-based mud viscosifier up to 350°F; economical
CP-EZRecommendedRecommendedRecommendedRecommendedMineral-oil-based mud viscosifier up to 400°F; easy to disperse and rapid yielding
CP-992RecommendedRecommendedRecommendedRecommendedEfficient viscosifier for multiple oil-based mud systems
CP-250ARecommendedRecommendedRecommendedRecommendedEfficient viscosifier for multiple oil-based mud systems
CP-2138RecommendedRecommendedRecommendedRecommendedExtreme-temperature OBM applications above 450°F over 10 days
SG-58Not suitableRecommendedRecommendedRecommendedSuspends weighting materials and solids with less increase in viscosity and gel strength; stable above 400°F
CP-6ARecommendedRecommendedRecommendedRecommendedFree of organic chlorides
CP-6BRecommendedRecommendedRecommendedRecommendedFree of organic chlorides

Organophilic bentonite for oil-based drilling fluids

Organophilic bentonite is a modified clay material used in oil-based drilling fluids as a viscosifier and suspension agent. It helps improve rheology and suspend drilling solids.

It is used to improve rheology, suspend and transport drill cuttings, support solids suspension and provide lubrication support. Certain grades may also be used to help seal fractures as a lost circulation material.

CP-2E and CP-982 are listed as recommended for diesel-solvent-based mud up to 350°F.

CP-EZ, CP-992 and CP-250A are listed as suitable for mineral-oil-based mud applications up to 400°F.

CP-2138 is highlighted for extreme-temperature OBM applications above 450°F over a 10-day period.

Organoclay bentonite SG-58 is designed to suspend weighting materials and other solids with less increase in viscosity and gel strength than conventional bentonite- or hectorite-based organoclays.

No. According to the product selection chart, OC SG-58 is recommended for mineral-oil, synthetic-oil and all-oil systems, but not for diesel-solvent-based mud.

CP-6A and CP-6B are identified in the product chart as free of organic chlorides.

It may be used as a lost circulation material because of its sealing capability in rock fractures. Final suitability should be confirmed through laboratory and field testing.

The key information includes the base fluid type, operating temperature, exposure time, required rheology, solids-loading conditions, dispersion requirements and any chemical restrictions.



Organophilic bentonite for oil-based drilling fluids

How to Choose the Right Organobentonite:

1. First, tell us your operating temperature. Generally, our organic bentonite clay is suitable for drilling fluids around 180°C.

2. Also, tell us your base oil system, such as diesel, mineral oil, synthetic oil, or a full-oil system.

3. You can also tell us the model of organophilic clay bentonite you have used before. We will recommend a similar quality product based on its specifications.

4. You can also tell us your suspension requirements, such as the basic characteristics of rock cuttings, weighting materials, and other solids. We will make a judgment based on the information you provide and recommend the correct organobentonite model.

5. You can also tell us your dispersion requirements, whether you require rapid dispersion or dispersion under traditional mixing conditions. Generally, our products provide excellent dispersion conditions after using polar activators or under high shear conditions.

Organophilic bentonite for oil-based drilling fluids | 

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