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Vol 71 Iss. 2
Pages:
46-50
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RUS
Article

Peculiarities of drilling and sampling during exploration of phosphorite-bearing deposits of Estonian SSR

Authors:
G. G. Abels
Date submitted:
1975-08-07
Date accepted:
1975-10-07
Date published:
1976-02-01

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. A typical geologic section of Estonian phosphate deposits is as follows ...

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References

  1. Amelin B.A., Vasiliev V.D., Glinsky E.S. New methods of non-metallic fastening of boreholes. L., Nedra, 1964.
  2. Kudryashov B.B., Chistyakov V.K. Principles of Calculation of Drilling Parameters with Simultaneous Freezing of Passable Rocks. Journal of Mining Institute, 1969, vol. 57, iss. 2.
  3. Vorotintsev V.T. Double Core Pipes. Ugletekhizdat, 1953.

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