Results 11 to 20 of about 1,418 (251)
Comprehensive Exploration and three-dimensional construction technology of water plug based on directional horizontal drilling caved column [PDF]
E3S Web of Conferences, 2021 The ordovician limestone water inrush accident occurred during the excavation of 8228 working face in Tashan Coal Mine, Tongmei Group. On the basis of comprehensive geophysical exploration above and below the well, in order to find out the development ...
Tian Gan
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Technical difficulties and innovation in the Jiangyin Yangtze River crossing project of 3300 m HDD
Natural Gas Industry B, 2014 The Jiangyin Yangtze River Crossing Project sets up a record with the length of horizontal directional drilling (HDD) of 3300 m in the world. Inevitably, many technical difficulties might exist in pilot hole docking, reaming torque, property requirement ...
Wu Yiquan +4 more
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Study on the abrasion property of the anvil inside a hydraulic DTH hammer fitted with horizontal oriented sliders [PDF]
Fracture and Structural Integrity, 2017 Hydraulic hammers have been extensively applied to horizontal directional well drilling in hard rock formations. However, the service life of a hydraulic hammer is still unsatisfactory due to the heavy wear or abrasion of the horizontal anvil, which ...
J. He, Q. Yin, K. Yin
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An Estimation of Required Rotational Torque to Operate Horizontal Directional Drilling Using Rock Engineering Systems [PDF]
Journal of Petroleum Science and Technology, 2018 Horizontal directional drilling (HDD) is widely used in soil and rock engineering. In a variety of conditions, it is necessary to estimate the torque required for performing the reaming operation.
Hadi Fattahi
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Meikuang Anquan, 2021 Taking the actual drilling of multi-branch horizontal grouting wells in coal seam floor limestone layer of the Zhaogu No. 1 mine area as the research object.
LIU Xiugang, WANG Yi, LI Peng, SONG Yubo
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A Novel Model for the Real-Time Evaluation of Hole-Cleaning Conditions with Case Studies
Energies, 2023 The main challenge in deviated and horizontal well drilling is hole cleaning, which involves the removal of drill cuttings and maintaining a clean borehole.
Mohammed Al-Rubaii +2 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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Prospects for the Use of Technology of Rotary Steerable Systems for the Directional Drilling [PDF]
E3S Web of Conferences, 2020 In the process of gradual reorientation of the oil industry to the production of heavy hydrocarbons, inaccessible to traditional methods of production, the need arises for the application of modern technological solutions.
Epikhin Anton +2 more
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Horizontal directional drilling pilot bore simulation
TURKISH JOURNAL OF ELECTRICAL ENGINEERING & COMPUTER SCIENCES, 2017 Various underground communications (water or gas supply systems, sewage, power lines) have been installed in recent years using trenchless technologies, i.e. horizontal directional drilling (HDD). This technique by its nature does not disturb the traffic and is environmentally friendly.
Paulius Tervydis, Ruta Jankuniene
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Advances in Civil Engineering, 2022 With the increasing number of river-crossing pipeline projects, many studies have focused on the safety and stability of embankment slopes in horizontal directional drilling crossing embankment construction.
Jinhuang Yu +3 more
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