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DRILLING GRADE CLAY MINERAL

Drilling Bentonite

(Na, Ca)₀.₃₃(Al, Mg)₂(Si₄O₁₀)(OH)₂·nH₂O

Overview

Drilling bentonite is a clay mineral with high swelling capacity, water absorption, and suitable viscosity. It is widely used in oil and gas drilling operations.

It helps stabilize wellbore walls, control drilling fluids, and reduce fluid loss.

Chemical Formula: (Na, Ca)₀.₃₃(Al, Mg)₂(Si₄O₁₀)(OH)₂⋅nH₂O

Typical Analysis

ParameterValue
Montmorillonite> 80%
Moisture< 12%
Water Absorption> 600
pH8 – 10

Main Types

Sodium Bentonite

  • High swelling capacity
  • High viscosity
  • Suitable for fluid-loss control
  • Suitable for soft formations

Calcium Bentonite

  • Lower swelling capacity
  • Higher resistance to ionic contamination
  • Suitable for selected hard formations and saline water conditions

Applications

  • Oil and gas well drilling
  • Wellbore stabilization
  • Drilling mud preparation
  • Drilling lubrication
  • Drill-bit cooling
  • Cuttings transportation
  • Fluid-loss control