Results 11 to 20 of about 3,048 (244)
Petroleum Exploration and Development, 2013 In order to address the contradiction between drilling safety and coalbed damage control, a degradable drilling-in fluid (DIF) was developed for complex structure wells in coalbed methane (CBM) reservoirs.
Dawei LIU +5 more
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Research on Gas Extraction Technology of Directional Long Borehole in Ultrathick Coal Seam
Geofluids, 2022 Gas extraction is an important way to control gas disasters. The effect of traditional gas extraction drilling on ultrathick coal seam is not well. In order to improve the rate of gas extraction, directional long drilling is used to replace conventional ...
Yaobin Li, Tao Jiang, Xin Guo
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Meikuang Anquan, 2022 Stick-slip vibration generally exists in the process of drilling and construction, and near-horizontal directional drilling in underground coal mines is no exception.
WANG Siyi
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Drag Reduction Technology of Ultra-long Directional Drilling and Its Application
Meikuang Anquan, 2020 In view of the problems such as high resistance, low efficiency and limited drilling depth during the sliding directional drilling under the condition of deep hole, this paper studies and forms the drag reduction technology of sliding drilling, including
WANG Xian, JIANG Lei, LI Quanxin, XU Chao
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Action recognition method for mine kilometer directional drilling rig
Gong-kuang zidonghua, 2022 At present, the walking and drilling operations of the mine kilometer directional drilling rig are all realized by the manual operation of drillers. The intelligence level is low.
XIANG Xueyi +5 more
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Meikuang Anquan, 2023 The geological structure of the deep coal seam in Qinshui Basin is relatively complex, which poses a new challenge to the control of the directional landing site of the horizontal well and the control of the drilling trajectory of the horizontal section,
WANG Yuhong, SUN Tianyu, LI Peng
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Research on trajectory control of dual-power composite directional drilling in underground coal mine
Gong-kuang zidonghua, 2021 Drilling trajectory control is one of the key technologies to achieve safe and efficient composite directional drilling. Due to the different force conditions of drilling tools in the hole and the composition of the analysis model, the existing ...
LI Quanxin +3 more
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工程科学与技术, 2022 In view of the large terrain elevation difference along the Sichuan—Tibet railway, the steep topography of the long and large buried depth tunnel project, extremely poor traffic conditions, and the inability to implement vertical deep hole exploration ...
Zhengxuan XU +6 more
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Auxiliary adding and transporting technology of directional drill pipes
Meikuang Anquan, 2022 For the problems of high labor intensity and poor safety of manual way to add and transport the directional drill pipes in underground coal mine, based on the large diameter directional drilling rig structure layout and drilling technology ...
CHEN Zeping
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Development of Comprehensive Acquisition Software for Measurement While Drilling Data Based on VUE Coal Mine [PDF]
E3S Web of Conferences, 2023 For the current coal mine directional drilling MWD equipment and system are independent of each other, resulting in different forms of MWD data at the bottom of the hole, forming data islands; Based on the B/S system architecture mode, by comparing the ...
Zhang Jungang +4 more
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