WEIGHTING MATERIAL

Barite, (PDT-BAR)

High-grade barium sulfate specially processed use as a drilling fluid weighting additive. PDT-BAR meets the API Specification 13A, Section 2 requirement for a drilling fluid BARITE.

Application

Primarily for drilling fluids, barite increases mud density while maintaining low solids to help control formation pressures.

Advantages

  • High specific gravity; raises drilling fluid density with minimum solids
  • Controls formation pressure, stabilizes the borehole
  • Cost-effective, non-toxic, and chemically inert

Properties:

  • Specific Gravity: 4.2 (minimum)
  • Moisture Content: Less than 1%
  • Bulk Density: 150 lbs/ft3
  • Mineral Content: 94% barium sulfate

Mixing and application:

Add BARITE through high shear mixer or jet hopper so that entire circulating volume is at uniform weight. Example: Starting with 100 gallons of mud at a weight of 9 lbs/gal, 134 lbs of BARITE will raise the weight to 10 lbs/gal and increase the volume to 104 gallons.

Calcium Carbonate (CaCO3)

Calcium Carbonate (CaCO3) is used as a bridging agent and/or weighting material in oil base and water base drilling fluids, drill-in fluids, work over fluids, and completion fluids.

Calcium Carbonate (CaCO3) comes in a wide variety of particle sizes ranging from 325 mesh (35 µ) to 30 mesh (550 µ). Custom sizing (fom 550 to 5000µ)  for particular applications is also available.

 Calcium Carbonate used to prevent fluid invasion of permeable zones and to prevent loss of circulation during drilling, workover, and completion activities. Calcium Carbonate is applicable in all drilling fluids, aqueous and non-aqueous. It can be used to prepare a pill for spotting purposes. CALCIUM CARBONATE is also used as an acid soluble weighting material for drill-in or workover fluids with a density of 14.0 ppg or less.

Calcium Carbonate is 98 to 99.5% soluble in 7.5-15% hydrochloric acid solution, thus minimizing permanent plugging of the producing formation. It is available in grades ranging from 325 mesh up 30 mesh to provide the particle sizes needed for effective bridging of the producing interval.