Resilient graphite is a deformable carbon lost circulation material for fractured and pressure-cycling formations. Ironstone supplies drilling-grade resilient graphite in fine, medium, and coarse grades, with a certificate of analysis for every batch.
Resilient graphite is a graded carbon material that is deformable rather than rigid. When it enters a fracture it compresses to fit the opening, and it springs back to keep the seal in place as downhole pressure rises and falls — where a hard, brittle particle would crush or be pumped back out. That resilience is why it is valued for fractured formations and for wellbore-strengthening treatments, where the seal must survive pressure cycling. It is often blended with sized calcium carbonate and fiber rather than run alone.
| Property | Typical | Basis |
|---|---|---|
| Grades | Fine, medium, coarse (by particle size) | Sieve |
| Particle size | Fine ≈ 100 µm · medium ≈ 400 µm · coarse ≈ 1000 µm (typical) | Sieve / laser |
| Resilience (rebound) | High rebound after compression at 10,000 psi | Compression rebound |
| Carbon content | High-carbon graphitic material | Carbon analysis |
| Median particle size (D50) | Stated per grade on the certificate of analysis | — |
Typical grade ranges; the exact particle-size distribution and rebound figures are stated per grade on the certificate of analysis.
Grade and dosage follow the loss severity: fine grades at background concentration for seepage, coarser grades and blends for larger losses. When a downhole motor or measurement tool is in the string, only fine, sized material can be pumped through it, so a coarse treatment usually waits until the tool can be pulled. Our LCM selection guide sets the grade and concentration by loss rate.
Indicative CIF price on request; indicative FOB ranges appear in the monthly Price Letter. For a firm price, send your grade, volume, and port on WhatsApp.