WH-3L Retarder for Oilwell Cement (Acrylamide Type)

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

• Thickening Time (130 °C, 80.7 MPa, 65 min), min: ≥ 180.

• Initial Consistency (110 °C, 80.7 MPa, 65 min), Bc: ≤ 30.

• Thickening Linear Mutation Value, Bc: ≤ 10.

• Time from 40 Bc to 100 Bc (130 °C, 80.7 MPa, 50 min), min: ≤ 40.

• Thickening Time Extension (min): > 60.

• Dosage Sensitivity (%): ≤ 25.

• Temperature Sensitivity (%): ≤ 20.

• Free Water (90 °C, %): ≤ 1.4.

• Compressive Strength (154 °C, 20.7 MPa, 24 h), MPa: ≥ 14.0.

• Cement Slurry Composition: Class G (HSR) cement, quartz sand, silica fume; others as required; Water: distilled.

Key Benefits

• Designed for 110–154 °C conditions, significantly extending thickening time (TT100) to reduce early‑set and stuck‑pipe risks.

• Controls initial consistency and linear mutation (≤30/≤10 Bc) to ensure stable thickening behavior and pumpability.

• Controlled dosage and temperature sensitivity (≤25%/≤20%) allow for on‑site fine‑tuning within the operational window.