PAC-LV is polyanionic cellulose in its low-viscosity grade — a filtration-control polymer for water-based drilling fluid that cuts fluid loss without adding much viscosity. Ironstone supplies drilling-grade PAC-LV with a certificate of analysis for every batch.
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. The low-viscosity grade is chosen when the mud is already at the target rheology and you only want to bring the filtrate down — common in dense, solids-loaded, and brine systems where extra viscosity would be a problem. Because it is a purified, high-substitution cellulose, PAC-LV keeps working in seawater and field brines where cheaper cellulose grades lose performance.
| Parameter | Typical value | Basis |
|---|---|---|
| Appearance | Off-white to cream free-flowing powder | Visual |
| Moisture | ≤ 10% | — |
| Degree of substitution | ≥ 0.90 | — |
| pH (1% solution) | 6.0 – 8.5 | — |
| Apparent viscosity | Low-viscosity grade (LV) | Rotational viscometer |
| API fluid loss | Meets API Spec 13A for PAC-LV | API filter press |
| Particle size | Stated on the certificate of analysis | Sieve |
Typical drilling-grade values. The certificate of analysis states the exact figures for each batch, reported against the API Spec 13A test procedures with the edition noted.
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. When we quote, we include the technical data sheet with the manufacturer’s dosage guidance as a starting point.
We quote an indicative CIF price on request and publish indicative FOB ranges in the monthly Price Letter. For a firm price, send your volume and port on WhatsApp.