PAM-P Polymer Mud for Pebble StrataNPT-PAM-P
A high-carrying polymer mud for pebble and boulder drilling — high yield point and shear resistance keep cuttings suspended when pumps stop.
Product Overview
One-liner: High cuttings carry for pebble strata, A high-carrying polymer mud for pebble and boulder drilling — high yield point and shear resistance keep cuttings suspended when pumps stop.
PAM-P handles the large cuttings of pebble and boulder strata by raising yield point and suspension capacity, cutting sediment and re-drilling. It builds a cemented protective ring in loose pebbles against collapse and overbreak, working with both rotary and percussion rigs.
High carry
Yield point ≥ 12 Pa keeps pebble cuttings in suspension.
Shear resistant
Viscosity retention ≥ 90% after pumping cycles.
Stable wall
A cemented protective ring in loose pebbles prevents collapse and loss.
Applicable Strata / Scenarios
| Strata type | Typical scenario | Recommended ratio | Expected effect |
|---|---|---|---|
| Pebble | Rotary bored piles | 1:250 | Anti-collapse, stable wall |
| Boulder | With percussion rigs | 1:200 | Suspends cuttings, less sediment |
| Gravel | Pile wall protection | 1:300 | Lower slurry loss |
| Backfill | Pipe jacking / utility tunnels | 1:250 | Balanced hole pressure |
Technical Data Sheet
Quantified core indices for product selection and tender comparison; a test report ships with every batch.
| Test item | Specification | Test method |
|---|---|---|
| Appearance | White powder | Visual |
| Solids content | ≥ 97.0% | GB/T 8077 |
| pH (1% solution) | 7.0–9.0 | pH meter |
| Viscosity (1% solution) | ≥ 60 mPa·s | Rotational viscometer |
| Yield point | ≥ 12 Pa | 6-speed viscometer |
| Fluid loss | ≤ 10.0 mL | API filter press |
| Dissolution time | ≤ 20 min | Stirring observation |
How to Use / Mix Design
| Step | Key points | Reference dosage |
|---|---|---|
| Make-up | Sprinkle slowly into a stirred water vortex | 1:250 (by mass) |
| Dissolve | Stir for 15–20 minutes until fully dissolved | — |
| Adjust | Add concentrated slurry based on return volume and sediment | As required |
| Maintain | Test viscosity and sand content every 2 hours | Every 2 hours |
Related Solutions
Related Cases
Southwest · Bridge pilesPile drilling through pebble strata: 100% hole acceptance
Main-pier piles of a major bridge in Southwest China crossed deep pebble beds with stones over 800 mm. Φ1500 holes shrank to Φ1380, blocking cage installation, and bottom sediment ran thick — more than 4 clean-out passes per pile.
Project scaleMain-pier piles at Φ1500 mm through pebbles over 800 mm
Northwest · Bridge pilesBoulder-strata pile walls in Northwest China: 98% wall stability
A bridge foundation in Northwest China crossed boulder beds. Large stones violently disturbed the walls — collapse and spalling were frequent, and heavy waste slurry forced constant pond clean-outs.
Project scaleBridge piles through boulder beds with large stones and severe wall disturbance
Tell us your strata conditions —
get tailored selection advice
Share your strata, borehole diameter and schedule; engineers will reply with mix advice, quantity estimates and lead time. Your information is used only for this enquiry.