Kinetic Hydrate Inhibitor (KHI) Polymer
Kinetic Hydrate Inhibitor (KHI) is a low-dosage hydrate inhibitor (LDHI) based on polyvinylcaprolactam (PVCap) or polyvinylpyrrolidone (PVP) that delays hydrate nucleation and crystal growth rather than thermodynamically shifting equilibrium conditions. Effective at concentrations of 0.1–1.0 wt%, representing a 30–60-fold dosage reduction compared to MEG, making it cost-effective and preferred for low water-cut flowlines.
Technical Specifications
| appearance | Clear to slightly hazy aqueous solution |
| viscosity (mPa·s, 25°C) | 50–500 |
| active polymer content (%) | 40–50 |
| pour point of product (°C) | ≤-20 |
| hydrate subcooling protection (°C) | ≥10 |
Applications
- Low water-cut gas pipeline hydrate prevention
- Replacement or complement to thermodynamic inhibitors
- Satellite field tie-back pipeline hydrate control
- Short shut-in pipeline protection
- Deep-water pipeline low-dosage flow assurance
Key Features
- Low dosage (0.1–1.0 wt%) vs. 30–60 wt% for thermodynamic inhibitors
- Significantly reduces injection system CAPEX and OPEX
- Delays hydrate nucleation for up to several hours
- Compatible with corrosion inhibitors and other production chemicals
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