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Advances in Materials Science and Engineering
Volume 2015 (2015), Article ID 945475, 7 pages
Research Article

Composition Optimization of Glass-Like Casing and Its Novel Application in Mending Instable Borehole Wall

1Key Laboratory on Deep Geodrilling Technology of the Ministry of Land and Resources, China University of Geosciences, Beijing 100083, China
2Sinomine Resource Exploration Co., Ltd, Beijing 100083, China

Received 21 August 2014; Revised 2 January 2015; Accepted 7 January 2015

Academic Editor: Hanlie Hong

Copyright © 2015 Zhi-jun Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A glass-like casing was developed to mend the instable borehole due to its great similarities in compositions and structure. In order to boost the casing’s mechanical properties and lower its cost, different wt% additions of aluminum and quartz sand are added into the composition. Based on the outcomes of differential scanning calorimeter (DSC), it is suggested to be sintered at the temperature of 700°C. The results of X-ray diffraction (XRD) show that aluminum and SiO2 are its main crystalline phases. Its compression strength and the tensile strength range 5–14 Mpa and 0.5–4.5 Mpa, respectively, with the relative densities of between 1.00 g/cm3 and 1.19 g/cm3. In the end, a glass-based formula with 30 wt% aluminum and 40 wt% quartz sand is developed and experimentally applied.