Due to multiple corrosive media and the high-temperature, high-pressure working environment in water wells, the water well casing becomes a challenge for corrosion and scaling protection. Frequent replacement of the casing not only reduces extraction efficiency but also causes significant economic losses.
Our company has developed a new generation of modified ultra-high molecular weight polyethylene (UHMWPE) lined pipes specifically for the special working conditions of injection wells. The material is enhanced with additives for wear resistance and anti-scaling, making it more suitable for complex downhole conditions, and has achieved favorable results in use.
Ultra-high molecular weight polyethylene (UHMWPE) lined water well pipe
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Serial Number |
Indicator Type |
Project |
Technical indicators |
Test Method |
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95°C |
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1 |
Normal temperature performance |
Density, g/cm³ |
0.94-0.97 |
GB/T1033.1 |
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|
2 |
Vicat softening temperature (A50), ℃ |
≥ 130 |
GB/T1633 |
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3 |
Notched impact strength of simply supported beam, kJ/m² |
≥ 50 |
GB/T1043 |
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4 |
Tensile elongation at break,% |
≥ 400 |
GB/T8804.3 |
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5 |
Tensile Break Yield Strength, Mpa |
≥ 20 |
GB/T8804.3 |
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6 |
Sliding wear, × 10-3mm³/m |
27/8 |
≤ 5.5 |
Q/0500SDR001-2018 |
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7 |
31/2 |
≤ 3.5 |
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8 |
41/2 |
≤ 2.5 |
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9 |
Aging performance (oil bath① 6d) The oil bath temperature is consistent with the maximum use temperature of different models |
Tensile elongation at break,% |
≤ 15% |
Q/0500SDR001-2018 |
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10 |
Tensile Break Yield Strength, Mpa |
≤ 15% |
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11 |
Mortar wear, × 10mm-3 |
≤ 50 |
Q/0500SDR001-2018 |
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①: The test oil bath temperature is the highest use temperature of the liner. |
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