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Chemola™ ThredOn™ 306 Heavy DC

60% Lead Drill Collar Compound

Chemola™ ThredOn™ 306 Heavy DC is a heavy duty drill collar compound containing a minimum of 60% atomized lead powder. Heavy DC is resistant to vibration, contraction or expansion of tool joints and can be used as a lubricant and sealant for all threaded connections. Heavy DC prevents metal to metal contact, eliminates galling and seizure of threads. It provides a tight, leak-proof seal under high temperature and pressures and protects threads against corrosion. Heavy DC conforms to the requirements and standards of API Spec. 7, Appendix F, May, 1979.

*Caution: Do Not Use On Potable Water Lines

Recommended Uses

Heavy DC is specifically formulated for use on drill collar rotary shoulder connections and is also great for drill pipe.

Typical Characteristics

TitleValue
AppearanceBlack, Smooth
NLGI1
Penetration (ASTM D217)300-330
Worked Penetration, 60x (ASTM D217)300-330
Base GreaseLithium complex
Base OilMineral Oil
Base Oil Viscosity140 cSt at 40°C
Base Oil Viscosity10 cSt at 100°C
Base Oil Pour Point-10°F (-23°C)
Solids Content60% lead
Specific Gravity2.6
Density (lb/gal)21.7
Dropping Point (ASTM D566)500°F (260°C)
Flash Point430°F (221°C)
Temperature Range0°F to 500°F (-18°C to 260°C)
Friction Factor (API 7A1) 1.0
Brushable To0°F (-18°C)
Sulfur Content<0.3%

Packaging Information

Item NumberUnit SizeQuantity
0306050WMS50 lb metal pail

DO NOT USE ON OXYGEN SERVICES.

  • *Caution: Do Not Use On Potable Water Lines