Bentonite Type W-Premium

HDD Bentonite for Maxi Rig Applications

Bentonite Type W–Premium is a high yield Wyoming-type sodium bentonite especially developed for HDD maxi rig applications. The product is characterized by a high shear thinning rheology and high initial gel strengths. Its extra high carrying capacity and hole cleaning properties even at very long crossings and low flow velocities as encountered at big diameter drillings. Due to the excellent shear thinning properties of BentoniteType W–Premium the risk of break outs is reduced remarkably.

Additives for increasing viscosity and carrying capacity are not recommended.
PAC L or PAC ULV can be used to reduce filtrate.

Horizontal Directional Drilling (HDD) – Maxi Rig Applications


  • Excellent shear thinning rheology
  • High carrying capacity at low annular velocities
  • High initial Gel Strength
  • Extraordinary high viscosity at low shear rates (LSRV)
  • Minimum resistance to flow/to pump.
  • Low annular pressure loss
  • Quick ready to use
  • Low polymer content
  • Good recycling properties on shakers

Typical Concentrations:
Cohesive Soils: 30 - 35 kg/m³
Mixed Soils / Sand: 35 - 40 kg/m³
Coarse Soils, Gravel: 45 - 50 kg/m³

To achieve best performance of the product it is recommended to mix slowly and uniformly through a high shear jet-type mixer over one or more cycles of the volume of the slurry. Minimum mixing time 20 minutes. The make-up water should be checked for pH value and water hardness, for necessary adjustment use soda ash (a maximum of 0.4 kg/m³).

Phrikolat Bentonite Type WPackaging:
Big Bags à 1000 kg


Bentonite Type W

Premium Grade Sodium-Bentonite

Phrikolat Bentonite Type W is a high yield Wyoming-type sodium bentonite. It is especially fine-grained and hydrates more than other types of clays. Due to its high montmorillonite content Bentonite Type W is highly productive and requires only very short time to yield.

Water based drilling fluids in the fields of: Horizontal-Directional-Drilling (HDD); Vertical Drilling; Pipe Jacking; Microtunnelling; Water Well Drilling; Civil Engineering

Bentonite Type W is easily to mix with water and provides in small concentrations stable suspensions with optimum gel strength and cuttings suspension while minimum resistance to flow/to pump. It reduces filtration by forming a thin filter cake with low permeability and improves borehole stability in poorly consolidated sand and gravel formations. Bentonite Type W can be used as a single product in standard grounds or as a basis for drilling fluids systems to be enhanced by polymer addition in difficult grounds. Polymers should always be added after mixing the bentonite with water.

Bentonite Type W is compatible with all Phrikolat polymers and does not contain any harmful ingredients.

Typical Concentrations:
Clay + Clay/Sand: 20-25 kg/m³
Sand + Gravel: 25-35 kg/m³
Gravel: 35-50 kg/m³

Mixing slowly and uniformly through a high-shear, jet-type mixer over one or more cycles of the volume of slurry will increase the performance of the product. The make-up water should be checked for pH-value and water hardness, where appropriate a conditioning with soda ash is required (a maximum of 0.5 kg/m³). Performance reduced in salty water due to decreased hydration.

Phrikolat Bentonite Type WPackaging:
25 kg multiple paper-bags with red band on pallet, shrink wrapped, 1000 kg per pallet
Big Bags à 1000 kg
Big Bags à 650 kg or 500 kg (on request)


Guar Gum

Guar Gum is obtained from the seeds of the guar plant originating mainly from India and Pakistan.

Guar Gum is a galactomannan to be used as a highly effective thickener and binder in various industries.

Range of application:

  • Food industry
  • Cosmetic industry
  • Paper industry
  • Paints
  • Textiles
  • Animal feed
  • Drilling fluids for oil and gas drilling, water well drilling, horizontal directional drilling, mining

Xanthan Gum


Xanthan Gum is a natural polysaccharide with exceptional qualities as a rheology control agent in aqueous systems and as a stabilizer for emulsions and suspensions. As drilling fluid Xanthan Gum provides good stability against salt, high temperature and shear. Its pseudoplastic rheology improves the mobility control of water and keeps the cuttings in suspension.

Range of application:

  • Food industry
  • Animal feed
  • Cosmetics
  • Adhesives, cleaners, polishes and paints
  • Textile and paper industry
  • Drilling fluids for oil and gas drilling, horizontal directional drilling and mining


Project fluid planning

Project fluid planning
Our engineers assist in:

  • Drilling calculations incl. pipe statics
  • Hydraulic calculations
  • Technical examination and evaluation of HDD projects
  • Risk analysis

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Industrial thickeners

Well known since 1956: PHRIKOLAT CMC

  • CMC - Carboxymethylcellulose
  • HEC - Hydroxyethylcellulose
  • Xanthan Gum
  • Guar Gum


Phrikolat phone - Telefon +49 (0) 2242 933920

Member DCA Drilling Contractors Association Europe