FIELD: environmental protection, particularly waterproofing of mud sumps used in drilling of oil and gas holes. SUBSTANCE: method involves digging slot-like trench, stepping back 0.5-1.0 m from prospective walls of sump. Then trench is filled with waterproofing material, the sump proper is dug out and its bottom is also lined with waterproofing material. EFFECT: higher efficiency.
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Authors
Dates
1994-07-30—Published
1993-04-02—Filed