WH-1L Retarder for Oilwell Cement (Organic Acid Type)

• Standards Basis: SY/T 5504.1–2013 (retarders).

• Thickening Time (78 °C, 34–35 MPa, 40 min), min: ≥ 120.

• Initial Consistency (78 °C, 35 MPa, 40 min), Bc: ≤ 30.

• Thickening Linear Mutation Value, Bc: ≤ 10.

• Time from 40 Bc to 100 Bc (78 °C, 35 MPa, 40 min), min: ≤ 40.

• Thickening Time Extension (min): > 60.

• Dosage Sensitivity (%): ≤ 25.

• Temperature Sensitivity (%): ≤ 20.

• Free Water (78 °C, %): ≤ 1.4.

• Compressive Strength (98 °C, 20.7 MPa, 24 h), MPa: ≥ 14.0.

• Cement Slurry Composition: Class G (HSR) cement; Water: distilled.

Key Benefits

• Within the ~78–98 °C range, effectively extends thickening time (TT100) to reduce early‑set and stuck‑pipe risks and preserve pumpability.

• Controls initial consistency and linear mutation (≤30/≤10 Bc), improving operational stability and predictability.

• Dosage and temperature sensitivities are controlled (≤25%/≤20%), enabling on‑site fine‑tuning within the design window.