专利名称：Hydrosoluble polymers and their use as
additives in drilling fluids
发明人：LANGE, WERNER, DR.,BOHMER, BRANISLAV,
DR.
申请号：EP85100844.1申请日：19850128公开号：EP0152814B1公开日：19881228
摘要：water soluble copolymerisate. the 40 - 80 mol% of residues of formula i 10 to30 mol% of residues of formula ii 0 to 30 mol% of residues of formula iii und0 - 15 mol%of formula iv (iv) exist, and their use as additives in bohrsp\ülfl\üssigkeiten.
申请人：WOLFF WALSRODE AKTIENGESELLSCHAFT,WOLFF WALSRODEAKTIENGESELLSCHAFT
代理机构：Zobel, Manfred, Dr.
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