Amrfeo Private Limited

Drilling polymers, additives and foam

What does your fluid need?

Easy-Bore™

A PHPA gel that thickens a bentonite slurry in fresh water. In Pileman® at 50 kg per m³, Easy-Bore™ gel takes the Marsh viscosity from 48″ to 100″ and beyond.

Learn more →

AM-PAC™

Polyanionic cellulose (PAC) that cuts fluid loss in fresh or salt water: 100 to 500 g per m³ of slurry.

Learn more →

Foam-Drill™

A blend of anionic surfactants, typically 10 kg per m³ in fresh water under normal drilling conditions. It foams in fresh, brackish and seawater.

Learn more →

Add your name

Add an email address

Reply within 1 working day · or call, WhatsApp, email · Privacy policy

Sent. The technical desk replies within 1 working day.
Not sure which? Send us your drilling fluid details

What each one does in the fluid

  1. 1Viscosity
  2. 2Mixing
  3. 3Fluid loss
  4. 4Foam
  5. 5Clay
A large ball of sticky grey clay, roots caught in it, clinging to an orange steel tool

Thickens the slurry, coats the cuttings

Easy-Bore™ extends a bentonite slurry: added to Pileman® at 50 kg per m³, the gel lifts the Marsh viscosity from 48″ to 100″ and beyond. It coats and encapsulates cuttings on shale and reactive clays, prevents bit balling and reduces drill torque.

A pail of Easy-Bore™ gel, partially hydrolysed polyacrylamide, among stacked pails

Mixes straight into bentonite

Supplied as a gel, Easy-Bore™ dissolves fast in a bentonite suspension, without the fish-eyes that powder PHPA forms, and is compatible with most drilling fluid products, biopolymers, PAC or CMC. Fresh water only, treated with soda ash light.

A bentonite filter cake holding its shape in a vertical petri dish

Holds the water in the slurry

AM-PAC™ is a fluid-loss and filtration controller, and a minimal viscosifier, at 100 to 500 g per m³ of bentonite slurry. It is effective in saline water, over a wide pH range, and is not susceptible to a variety of bacterial attack.

A reverse circulation drill rig with its sample cyclone at a mine site

Lifts the cuttings on foam

Foam-Drill™ makes a stable foam at low concentration, typically 10 kg per m³, that carries the cuttings out and cools the bit: for air, reverse circulation, rock, water-well and mining work, and in loss-circulation zones.

Two beakers side by side, a reactive clay ball in fresh water and a reactive clay ball in Easy-Bore™ + Foam-Drill™ mix: in the first the clay ball has slumped into a heap, in the second it is still whole

Keeps sticky clay off the cutting head

Easy-Bore™ and Foam-Drill™ work together on reactive clay: the gel coats the clay and the foam carries it out, so it doesn't ball on the cutting head in HDD or microtunnelling. In our own test, a reactive clay ball broke down in fresh water within 15 minutes and stayed whole in the Easy-Bore™ + Foam-Drill™ mix.

Not sure what your fluid needs?

Send us the drilling fluid details: the bentonite in use, the ground and the water. The technical desk reads them and replies within 1 working day.

Made by us. Checked by others.

Since 1994

A manufacturer, not a trader. Bentonite at Bhuj, polymers at Domjur.

ISO 9001:2015

All our plants are quality management system certified.

One Star Export House

Recognised by the Government of India. We ship through Mundra and Kandla.

Own plant, Domjur

The polymers, cellulose and foam in every pail and drum are made at our own plant at Domjur, Howrah.

Choose your product

Viscosity takes Easy-Bore™. Fluid-loss control takes AM-PAC™. Air and foam drilling takes Foam-Drill™.

Back to one at a time
Every product on this page, side by side
Easy-Bore™AM-PAC™Foam-Drill™
UseViscosifier gel, for fresh water onlyFluid-loss control, fresh or saltwaterDrilling foam, fresh to seawater
Marsh viscosity48″ to 100″Marsh viscosity, gel added to Pileman® at 50 kg/m³no figure on its data sheetno figure on its data sheet
Fann 600 rpm, gel alone at 25 kg/m³40no figure on its data sheetno figure on its data sheet
Degree of hydrolysis60–70%no figure on its data sheetno figure on its data sheet
pH8–9pH, 3% solution7–10pH, 1% solution at 25 °C6.5–7.5pH, 1% solution
Specific gravity1.03–1.05no figure on its data sheet1.001–1.005
Doseno figure on its data sheet100–500 g/m³dose, per m³ of bentonite slurry10 kg/m³typical dose, fresh water
Viscosity, 2% solution at 25 °Cno figure on its data sheet7,000 cps minno figure on its data sheet
Degree of substitutionno figure on its data sheet0.8 minno figure on its data sheet
Active matter, dry basisno figure on its data sheet95% minno figure on its data sheet
Seawater pre-treated with soda ash, in its ASTM D1173 foam testno figure on its data sheetno figure on its data sheet30,000 ppm
Blue drums on the floor of our polymer plant at Domjur, with the mixing platforms behind

How much goes in

  1. Treat the make-up water. Easy-Bore™ takes fresh water only, treated with soda ash light; it is not designed for chloride or hard water of any kind. For Foam-Drill™ in very hard water, pre-treat with soda ash.
  2. Foam-Drill™: typically 10 kg per m³. That is for normal drilling conditions in fresh water. With severe water influx, raise the foam concentration and lower the injection rate; the right figure also depends on the drilling system, the depth and the equipment.
  3. AM-PAC™: 100 to 500 g per m³. Per m³ of bentonite slurry, in fresh or saltwater systems.

Frequently Asked Questions

Which one does my drilling fluid need?

Easy-Bore™ to thicken a bentonite slurry and protect against shale and reactive clay, in fresh water. AM-PAC™ to control fluid loss, in fresh or salt water. Foam-Drill™ to make drilling foam for air, rock, water-well and mining work, in fresh, brackish or seawater. Not sure? Send us your drilling fluid details and the technical desk replies within 1 working day.

What does Easy-Bore™ do to a bentonite slurry?

It thickens it, while the fluid loss stays the same. How much to add depends on your bentonite, ground and water: send us your mud programme.

Can Easy-Bore™ be used in salt or hard water?

No. Use it in fresh water only, treated with soda ash light; it is not designed for chloride or hard water of any kind. AM-PAC™ is effective in saline water, and Foam-Drill™ works with all types of make-up water, including hard, brackish and seawater.

How much AM-PAC™ goes in, and what does it do?

100 to 500 g per m³ of bentonite slurry, depending on drilling conditions. It controls fluid loss, adds a little viscosity, works across a wide pH range and helps hold back reactive clay and shale.

How is Foam-Drill™ dosed, and where is it used?

About 10 kg per m³ in fresh water; with heavy water influx, raise the concentration and lower the injection rate. It is used for air drilling, reverse circulation, rock drilling, water wells, mining and EPB tunnel face support, and, with AM-PAC™ or Easy-Bore™ gel, as a stiff foam for sticky clay and shale.

How are Easy-Bore™, AM-PAC™ and Foam-Drill™ packed?

Easy-Bore™ gel ships in 25 kg pails, AM-PAC™ in 25 kg bags, and Foam-Drill™ in 210-litre barrels.

Who makes Easy-Bore™, Foam-Drill™ and AM-PAC™?

Amrfeo, since 1994. All three are made by us at our polymer plant at Domjur, Howrah, West Bengal, under an ISO 9001:2015 quality system; our bentonite, Pileman® included, is mined and processed at Bhuj, Kutch. We are a Star Export House recognised by the Government of India, and export through Mundra and Kandla.

Last updated:

Get a drilling polymer or foam quote

Add your name

Add an email address

Check the phone number

Reply within 1 working day · Privacy policy
Sent. We reply within 1 working day.

Quote now

Add your name

Add an email address

Add your drilling fluid details (optional)

Reply within 1 working day · Privacy policy

Sent. We reply within 1 working day.
Scroll to Top