What is the difference between CP-2 and CP-982 organoclay?

CP-2 and CP-982 are both organophilic clay viscosifiers for oil-based drilling fluids with similar applications and performance profiles. Both are specified for diesel, crude, mineral, and synthetic base fluids. The primary technical difference is in their surface treatment chemistry: CP-2 is described as an amine-treated bentonite using a specific amine-based modification, while CP-982 uses a standard quaternary ammonium compound treatment. Performance in standard diesel OBM is comparable; CP-992 offers improved rapid yield development for synthetic and low-aromatic base fluids where CP-2 and CP-982 may require higher treat rates.

CP-2 Organophilic Clay — Amine-Treated OBM Viscosifier for Diesel & Oil-Based Drilling Fluids

Q: What is CP-2 amine-treated bentonite used for?

CP-2 is used as a viscosifier and gellant in diesel oil-based drilling fluids and invert emulsion systems. In diesel-based OBM, CP-2 increases yield point and gel strength to carry drill cuttings from the bit to surface, suspend weighting materials (barite) during circulation stops, aids filter cake formation and fluid loss control to permeable formations, and increases emulsion stability in invert emulsion systems. Suitable for oil-based drilling fluids, invert emulsion fluids, workover fluids, completion fluids, casing packs, packer fluids, and spotting fluids.

CP-2 is an amine-treated organophilic clay for diesel oil-based and invert emulsion drilling fluid applications. The amine surface treatment converts the naturally hydrophilic bentonite clay surface to organophilic — allowing dispersion in diesel and mineral oil rather than water, and enabling the clay platelets to develop yield point and gel structure in oil-continuous drilling fluid systems. CP-2 provides effective rheological support across the range of OBM and completion fluid applications in standard diesel and crude oil base systems.

Technical Properties

Parameter	Specification	Test Method
Chemical composition	Organically modified bentonite clay (amine treated)	—
Appearance	Off-white to tan free-flowing powder	Visual
Moisture content	≤ 4.0%	105°C, 2 hours
Particle size	≥ 95% passing 76 μm (200 mesh)	Sieve analysis

Drilling Performance Functions

Viscosifier and gellant — builds yield point and gel strength to carry cuttings and provide suspension at rest
Fluid loss control — organoclay platelets contribute to filter cake formation, reducing filtrate invasion into permeable formations
Emulsion stability — supports water-in-oil emulsion stability in invert emulsion drilling fluid systems
Cutting carrying capacity — maintains solids in suspension during circulation, ensuring effective hole cleaning
Weighting material suspension — prevents barite sagging in deviated and horizontal well sections during circulation stops
Temperature stability — maintains rheological performance at elevated well temperatures in standard diesel OBM applications

Compatible Base Fluids

Base Fluid	Application	Typical Treat Rate
Diesel oil	Standard OBM, invert emulsion	5–15 kg/m³
Crude oil	Workover, completion fluids	5–12 kg/m³
Mineral oil	All-mineral OBM, invert emulsion	5–15 kg/m³
Synthetic base oil	SBM for deepwater/offshore	6–15 kg/m³

Grade Selection: CP-2 and CP-982 are equivalent choices for standard diesel and mineral oil OBM. Use CP-992 or CP-31 when working with synthetic base fluids (internal olefins, alpha olefins) or low-BTEX mineral oils requiring rapid yield development with less shear. Use CP-EL or CP-GL for HTHP wells where bottom-hole temperatures exceed 150°C.

Drilling Fluid Applications

Fluid Type	Function
Oil-based drilling fluids (OBM)	Primary viscosifier, yield point builder
Invert emulsion fluids	Viscosifier, emulsion structure support
Workover fluids	Viscosity control, completion compatibility
Completion fluids	Bridging agent suspension
Casing packs	Suspension, static gel for long-term stability
Packer fluids	Gel strength for extended static periods
Spotting fluids	Pipe-freeing spotting fluid viscosity

Frequently Asked Questions

What is CP-2 amine-treated bentonite used for?

CP-2 is used as viscosifier and gellant in diesel oil-based and invert emulsion drilling fluids. Builds yield point and gel strength for cutting transport, suspends barite during circulation stops, aids fluid loss control, and increases emulsion stability. Suitable for OBM, invert emulsion, workover, completion, casing packs, packer fluids, and spotting fluids in diesel, crude, mineral, and synthetic base oils. Full OBM guide →

What is the difference between CP-2 and CP-982?

CP-2 and CP-982 are both organophilic clay viscosifiers for OBM with comparable performance in diesel and mineral oil systems. CP-2 uses amine-based surface treatment; CP-982 uses standard quaternary ammonium treatment. Both meet API 13A criteria. Performance in standard diesel OBM is equivalent. For synthetic base fluids or rapid yield development at lower shear, use CP-992 or CP-31.

Packaging and Storage

Parameter	Specification
Standard packaging	25 kg kraft paper bags with PE inner liner
Shelf life	2 years from manufacture date
Storage conditions	Dry, covered warehouse; protect from moisture

Related drilling grades: CP-982 · CP-992 (synthetic/low-BTEX) · CP-31 (self-activating) · CP-34 (dual-use coatings + drilling)

Related applications: Oil-Based Drilling Fluids · Viscosity Control in OBM

CP-2 Organophilic Clay — Technical Data Sheet