Wellbore Strengthening & Pressure-Bearing Materials
One-Way Pressure Sealant for Drilling Fluids
A one-way pressure sealant synthesized from modified composite minerals and polymer additives. Under positive differential pressure it rapidly forms a dense sealing layer — with compressive strength of 30 MPa or more — across wellbore fractures and pores of 0.1-5 mm, while reverse flow of formation fluids remains unobstructed and base mud properties are unaffected.
APPLICATIONS
Application scenarios
- 01Fractured, permeable and combined losses in sandstone, shale and conglomerate
- 02Vertical, directional and horizontal wells, onshore and offshore
- 03Mud densities of 1.0-2.2 g/cm³, applied preventively or after losses occur
PERFORMANCE
Performance indicators
| Item | Specification | |
|---|---|---|
| Appearance | Pale Yellow or Grayish-Yellow Powder | |
| Density g/cm3 | 1.45～1.65 | |
| Ignition Residue % | ≤ | 7.0 |
| Sieve Residue (0.25 mm) % | ≤ | 10.0 |
| Loss on Drying % | ≤ | 10.0 |
| pH | 6～8 | |
| Apparent Viscosity mPa·s | 6～9 | |
| Sealing Fluid Loss Reduction Rate % | ≥ | 70 |
USAGE
Usage
Add directly through the mixing hopper; typical dosage is 2.0%-5.0% by weight for preventive treatment, increased as needed for active losses. Compatible with water-based and oil-based muds.
PACKAGING
Packaging & delivery
25 kg/bag standard; export packaging available on request.
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One-Way Pressure Sealant for Drilling Fluids
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