针对水井修井和水平井成井填砾困难的特点，通过大量室内试验，研制了陶粒贴砾过滤器。
According to the difficulties of water well repairing and gravel-filling for horizontal well, porcelain granule pre-coated well screen was developed based on a lot of laboratory tests.
针对水井修井和水平井成井填砾困难的特点，通过大量室内试验，研制了陶粒贴砾过滤器。
According to the difficulties of water well repairing and gravel-filling for horizontal well, porcelain granule pre-coated well screen was developed based on a lot of laboratory tests.
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