Effective way to increase core yield and quality in frozen rocks
Abstract
The most important task of exploration core drilling is to ensure high recovery and quality of core – the source material for geological and engineering geological sampling. Analysis of production data of a number of organizations engaged in drilling in permafrost rocks shows that when drilling with flushing, the core recovery is 60 70% for bedrock with moisture content of 2 5% and 20 30% in rocks with moisture content of 15% and more. In production conditions, very often in order to increase core recovery, one switches to “dry” drilling. However, the core quality deteriorates sharply. Partial or complete thawing of the core occurs, with violation of its structural characteristics.
Область исследования:
(Archived) Without section
Funding:
None
References
- Baskilovich I. A., Kudryashov B. B., Stepanov P. M. To the possibility of rotary drilling with bottom-hole cleaning by cooled compressed air at placer gold deposits. Tr. TsNIGRI, Sbornik 69, M., 1967.
- Elmanov I. P. Drilling of Exploration Wells with Air Blowing in Permafrost Rocks. Nedra, 1965.
- Kudryashov B. B. Normalization of the temperature regime of boreholes when drilling through permafrost rocks with bottom-hole air purging.Zapiski Gornogo Instituta, vol. 57, iss. 2, 1969
- Kudryashov B. B., Kirsanov A. I., Stepanov P. M. Thermal regime of the well while drilling with bottom-hole air cleaning on permafrost rocks. V sb. Teoriya i praktika bureniya skvazhiny s ochistkoy zaboya vozdukhom. VNIIOENG, M., 1967.
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