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Superdeep Scientific Drilling ‐ Lessons Learned for the Development of Modern Drilling Technologies
Author(s) -
Gelfgat Mikhail,
Sledkov Vladimir
Publication year - 2019
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.14028
Subject(s) - drilling , scientific drilling , session (web analytics) , library science , beijing , computer science , history , world wide web , engineering , mechanical engineering , china , archaeology
Principles #2 and 3 were based on the fact that light alloy drill pipes and turbodrills were successfully used in the USSR oil industry. The available commercial turbodrills had a variety of properties, which guaranteed proper selection for SG-3 drilling. The R&D focused on design of a coring tool for the expected drilling conditions. Several types of core bits and core barrels were developed and tested along with pilot borehole deepening. Continuous efforts to find the optimal combination of core bit performance and core recovery rate were not always successful. Challenging borehole conditions required a new and innovative approach to BHA design and tool selection for each run.