Peculiarities of drilling and sampling in the exploration of phosphorite-bearing deposits of the Estonian SSR
Authors:
Abstract
Drilling for phosphorite exploration in the ESSR is characterized by the lack of a reliable method for obtaining cores of shell sandstones composing the phosphorite-bearing strata. The experiments carried out make it possible to recommend general technical specifications for the design of a tool for drilling phosphorites.
Область исследования:
(Archived) Without section
Funding:
None
References
- Amelin B. A., Vasiliev V. D., Glinsky E. S. New Methods of Non-Metallic Casing of Boreholes. L., Nedra, 1964 (in Russian)
- Kudryashov B. B., Chistyakov V. K. Principles of Calculation of Drilling Parameters with Simultaneous Freezing of Passable Rocks. Zapiski Gornogo Instituta, 1969, vol. 57, issue 2 (in Russian)
- Vorotyntsev V. T. Double Core Pipes. Ugletekhizdat, 1953 (in Russian)
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