Since 1994
A manufacturer, not a trader. Bentonite at Bhuj, polymers at Domjur.
AM-PAC™: polyanionic cellulose for fluid-loss control
A modified natural cellulose that controls fluid loss and filtration in bentonite drilling slurries, in fresh or salt water, while adding little viscosity.
Description
AM-PAC™ is a natural cellulose, chemically modified into a polyanionic cellulose (PAC). In a bentonite slurry it controls fluid loss and adds a little viscosity, in fresh or salt water. It works at low concentration and over a wide pH range, resists many kinds of bacterial attack, and can also act as a clay and shale inhibitor.
Used for: HDD · Piling · Diaphragm walls · Water-well, geotechnical and exploration drilling
Other polymers, additives and foam: Easy-Bore™ · Foam-Drill™
What goes wrong on site
What you see on site
What this does about it
- Mud bleeds into permeable ground and the bore wall weakens.
- AM-PAC™ controls fluid loss and filtration in the bentonite slurry.
- The make-up water is salty.
- It works in fresh and salt water.
- Reactive clay or shale swells into the hole.
- It can also work as a clay and shale inhibitor.
- Fluid-loss treatment thickens the mud too much.
- It adds little viscosity and works at low concentration.
Technical properties
- 100–500 g/m³Dose, per m³ of bentonite slurry
- 7,000 cps minViscosity, 2% solution at 25 °C
- 0.8 minDegree of substitution
- 95% minActive matter, dry basis
- 7–10pH, 1% solution at 25 °C
Dose per m³ of bentonite slurry; the drilling conditions set where in the range. The other figures describe the powder as supplied: viscosity on a 2% solution (Brookfield LVF, spindle 4, 30 rpm), pH on a 1% solution, both at 25 °C.
Packing 25 kg bags.
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.
ISO 9001:2015
All our plants are quality management system certified.
Star Export House
Recognised by the Government of India. We ship through Mundra and Kandla.
Own plant, Domjur
The polymers, cellulose and foam are made at our own plant at Domjur, Howrah.
Frequently Asked Questions
What is AM-PAC™, and when do I add it for fluid loss?
AM-PAC™ is a polyanionic cellulose (PAC): natural cellulose, chemically modified. Add it when your bentonite slurry is losing too much water: it controls fluid loss and adds a little viscosity, in fresh or salt water. It is a white to cream powder that dissolves in hot or cold water.
How much AM-PAC™ do I add?
The recommended mix is 100 to 500 g per m³ of bentonite slurry; the drilling conditions decide where in that range. Hydrate the bentonite first, then add AM-PAC™ gradually while the slurry is agitated. Send your mud programme and the technical desk will suggest a starting dose.
Does it work in salt water?
Yes. It works in fresh and salt water. It is also effective over a wide pH range.
Will it thicken my mud?
A little. It controls fluid loss without changing how the slurry flows much.
Can it help in reactive clay or shale?
Yes. Besides controlling fluid loss, it can also work as a clay and shale inhibitor. By reducing fluid invasion it helps keep the borehole wall stable in permeable ground.
How is AM-PAC™ supplied?
It is made at our polymer plant at Domjur, Howrah. It is packed in 25 kg bags. For pricing, lead time and shipping to your port, ask for a quotation.
Which test methods and standards apply?
Tested to the methods its data sheet prints: solution viscosity on a Brookfield viscometer, and pH.
Who supplies AM-PAC™ polyanionic cellulose?
Amrfeo Private Limited, a manufacturer since 1994, makes and exports AM-PAC™, a polyanionic cellulose (PAC), supplying buyers across the Gulf, Europe and Asia. It is made at our plant at Domjur, Howrah, West Bengal, under ISO 9001:2015.
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