Two different operations per one round-trip operation

In the latter half of the 2011 year of 31 well of Samotlor field were successfully carried out pilot works for normalizing and leak-off testing of liners by decreasing level in well per one round trip operation (response of Drilling Department of West Siberian Drilling Division, OJSC Samotlorneftegaz) by means of including to BHA drain subs MP-83Y specially designed and produced for drill pipes SBT-89. All operations concerning designing and testing are made operatively and qualitatively.

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