کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1754642 1522804 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A new technology for the drilling of long boreholes for gas drainage in a soft coal seam
ترجمه فارسی عنوان
یک فناوری جدید برای حفاری گمانه طولانی برای زهکشی گاز در یک درز زغال سنگ نرم
کلمات کلیدی
درز زغال سنگ نرم، بهره وری حفاری گمانه؛ تخلیه بهره وری از گاز معدن زغال سنگ؛ حفاظت از سرمته حفاری
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی اقتصادی
چکیده انگلیسی


• We improve the efficiency of draining gas in a soft coal seam by a new technology.
• We propose a drilling technology of protecting the borehole.
• We propose spraying foam concrete to protect the borehole.
• We tested this new technology in the Zhaozhuang mines.

The geostatic stress, coal mine gas and disturbances produced by external loading can undermine the stability of a borehole and cause the borehole to collapse in a soft coal seam, which results in a poor efficiency of drilling long boreholes and draining gas in a soft coal seam. To improve the efficiency of drilling boreholes and draining gas in a soft coal seam, we propose a drilling technology of protecting the borehole by spraying foam concrete slurry onto the surface of borehole wall during drilling in a soft coal seam. To realize this process, we propose spraying foam concrete onto the borehole wall during drilling with a foldable drill bit and double drill pipes. Based on this new technology, the equipment and the material required for drilling long boreholes in a soft coal seam were studied. Finally, this new technology was tested in the Zhaozhuang mines in the Shanxi Province of China. The test results indicate the following: the process of spraying foam concrete on the borehole wall can relieve borehole collapse; the plant-based foam concrete has good air permeability, and has no effect on the permeability of the borehole wall; and the novel process of drilling boreholes and spraying foam concrete is an effective drilling process, which can relieve borehole collapse, improve the drilling efficiency and improve the draining efficiency.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Petroleum Science and Engineering - Volume 137, January 2016, Pages 107–112
نویسندگان
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