Results 21 to 30 of about 5,798 (299)
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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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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Space weather effects on drilling accuracy in the North Sea [PDF]
, 2005 The oil industry uses geomagnetic field information to aid directional drilling operations when drilling for oil and gas offshore. These operations involve continuous monitoring of the azimuth and inclination of the well path to ensure the target is ...
Reay, S. J. +14 more
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Investigation of the Effects of Weight on Bit and Rotational Speed on Directional Drilling Parameters and Drillstring Mechanics [PDF]
, 2020 To increase efficiency by optimization, automation has become synonymous with increased drilling efficiency. The oil and gas industry has slowly been adopting automation and process control to improve safety, increase efficiency and reduce downtime on ...
Akita, Emmanuel
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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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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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Bilinear modelling, control and stability of directional drilling [PDF]
, 2018 This paper proposes an approach for the attitude control of directional drilling tools for the oil and gas industry. A bilinear model of the directional drilling tool is proposed and it characterises the nonlinear properties of the directional drilling ...
Whidborne, James F., Inyang, Isonguyo J.
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Magnetic Interference Correction Method for Dynamic Measurement of Steering Head and Its Application
Shiyou jixieDuring the operation of the rotary steering system， the magnetic interference faced by the steering head when performing dynamic measurement tasks mainly comes from two aspects： one is the magnetic influence of the internal current fluctuation of the M30
Zhu Jinsong +6 more
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Design of drilling parameters monitoring system of directional drilling rig in coal mine tunnel
Gong-kuang zidonghua, 2019 In view of problems of deficiencies in real-time display and centralized storage of drilling parameters of full hydraulic directional drilling rig in coal mine tunnel, a drilling parameters monitoring system of directional drilling rig in coal mine ...
FANG Peng
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