CP-992 self-activating organoclay delivered consistent yield point and gel strength in a diesel-based OBM used for directional drilling in the Middle East.
A drilling contractor required a reliable organoclay viscosifier for a diesel-based OBM system used in horizontal directional drilling at temperatures to 150°C (300°F). The previous organoclay supplier provided inconsistent YP and gel strength batch-to-batch, causing non-productive time (NPT) from stuck pipe events.
CP-992 self-activating organoclay was added at 5 lb/bbl (14.3 kg/m³) to the diesel base fluid during mud mixing. No lime or water activation was required — ideal for field simplicity. The mud was mixed at 3,500 rpm for 20 minutes before adding other components.
| Parameter | Specification | CP-992 Result |
|---|---|---|
| Plastic Viscosity (PV) | 18–28 cP | 22 cP |
| Yield Point (YP) | 12–22 lb/100 ft² | 17 lb/100 ft² |
| 10-sec gel | 4–10 lb/100 ft² | 6 lb/100 ft² |
| 10-min gel | 8–18 lb/100 ft² | 13 lb/100 ft² |
| API fluid loss | <4 mL | 3.2 mL |
CP-992 consistently met all rheology specifications across 12 consecutive batches with <5% variation in YP — eliminating the NPT experienced with the previous supplier. The self-activating feature simplified field operations and reduced mud engineer preparation time by ~25%.
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