Modified drilling starch
“Drilling-grade modified starch for filtration control, supplied against the API Spec 13A requirements for starch, with a certificate of analysis for every batch.”
Ironstone Drilling Supply
“Supplier-agnostic sourcing platform for drilling consumables — drilling-fluid additives, PDC bits, and shaker screens — delivered CFR worldwide.”
Products & services
PAC-LV — polyanionic cellulose, low viscosity
“Drilling-grade polyanionic cellulose, low-viscosity grade, specified on apparent viscosity and filtrate volume, with a certificate of analysis for every batch.”
Questions & answers
How many 25 kg bags fit in a container?
“For dense bagged chemicals a shipping container fills up by weight long before it fills up by space — so the limit is the payload, not the volume.”
Which of these are dangerous goods for shipping?
“Caustic soda and caustic potash (solid) are dangerous goods for sea freight — UN 1823 and UN 1813, Class 8, corrosive. Soda ash, calcium chloride, hydrated lime, and citric acid are not regulated. Biocides such as glutaraldehyde and THPS vary by product, classed per the product safety data sheet.”
What does a thinner do, and when do I need one?
“As a water-based mud drills, it picks up clay solids. Clay particles carry electrical charges on their edges and faces that attract each other, so the particles link into a loose network — the mud "flocculates" and its viscosity and gel strength climb.”
Which thinner for high-temperature wells?
“Lignosulfonate is the most common thinner for general deflocculation in water-based mud, though its performance drops at the highest temperatures. Lignite (leonardite) products give filtration control and thinning with better temperature stability, and are often run together with lignosulfonate.”
How much thinner do I add?
“Thinners are added by pilot testing, not by a fixed dose. You treat a measured sample of the mud with increasing amounts of the thinner, measure viscosity and gel strength after each step, and scale the amount that works to the full system volume.”
What does a fluid-loss additive do in drilling fluid?
“As the fluid presses against a permeable formation, water tends to filter into the rock and leave the solids behind as a cake on the wellbore wall. A fluid-loss additive builds a thin, low-permeability filter cake so that very little water passes through.”
PAC, starch, or synthetic polymer — which one do I need?
“Polyanionic cellulose (PAC) suits fresh water through saturated brine and comes in low- and high-viscosity grades, though it costs more than starch and has a temperature limit around the mid-range of water-based mud.”
What temperature can each additive handle?
“Temperature is the property that decides the class. Starch has the lowest ceiling, PAC sits in the middle, and purpose-built synthetic polymers reach the highest.”
How are these products packed and shipped?
“The powders ship in 25 kg multi-wall paper sacks, palletized and containerized for full or part-container loads. None of these three classes is a dangerous good for sea freight, which keeps the shipping straightforward. We quote CFR to your port with the pack size, minimum order, and lead time stated on the quotation.”
What does drilling starch control?
“Drilling starch reduces fluid loss. It is pregelatinized — processed to hydrate in cold water without cooking — so its swollen particles are soft and deformable: they lodge in the pores of the filter cake and deform to seal them, cutting the filtrate.”
Standard or temperature-stabilized grade?
“Standard modified starch is the lowest-cost filtrate control for normal-temperature sections and short exposure times. Temperature-stabilized grades are additionally modified or cross-linked for deeper, hotter sections where standard starch degrades and the filtrate climbs mid-section.”
How much drilling starch do I use?
“Dosage is set by pilot test against your filtrate target in the brine you actually run — starch that performs in fresh water can behave differently in saturated salt, so test in your worst-case brine. We include the technical data sheet with dosage guidance and the temperature rating when we quote.”
What is PAC-LV used for?
“PAC-LV reduces API fluid loss by helping form a thin, low-permeability filter cake on the wellbore wall, so very little water passes into the formation.”
Why does active PAC content matter on a low-viscosity grade?
“Purity is the share of the dry solids that is active polymer. The balance is mainly residual reaction salt and sodium glycolate, with smaller amounts of unreacted cellulose and residual alkali, and in the bag you receive, water.”
How much PAC-LV do I use?
“Dosage depends on the filtrate target, the base fluid, and the solids in the system, so it is set by pilot testing rather than a fixed number: treat a measured sample of mud with increasing amounts, measure the filtrate after each step, and scale the amount that works to the full system volume.”
Data formats & record details
Download this profile and inspect its supporting evidence.
- Entity ID
- urn:readyscan:entity:ironstone-drilling-supply-q140677589
- Material fingerprint
- fnv1a64:26b6c586a28448d5
- Entity revision
- fnv1a64:745cc8e08ad1f829
- Published
- 2026-10-18
- Modified
- 2026-10-18
- Source summary
- Ironstone Drilling Supply: “Supplier-agnostic sourcing platform for drilling consumables — drilling-fluid additives, PDC bits, and shaker screens — delivered CFR worldwide.”