Results 1 to 10 of about 5,798 (299)
The optimization algorithm for application in directional drilling trajectories of energy field
Energy Reports, 2022 Recently, the directional drilling technology (DDT) has been extensive used in many energy field such as coal geological exploration, gas drainage and artificial freezing engineering etc.
Shu-jie Liu +3 more
doaj +3 more sources
Petroleum Exploration and Development, 2017 : To meet the wellbore trajectory control requirements for all kinds of steering drilling modes, the directional deflection equations for steerable drilling tools and the process control method for wellbore trajectory were proposed and an application ...
Xiushan LIU
doaj +3 more sources
Shiyou shiyan dizhi, 2022 Aromatic parameters have been widely applied to assess the maturity of organic matters. Some parameters may not only be affected by maturation, but also more affected by organic matter source, sedimentary environment, etc.
Zhijun CHEN +6 more
doaj +1 more source
Meikuang Anquan, 2022 Aiming at the characteristics of poor cementation and broken seam in Wangpo Coal Mine, the pneumatic directional drilling test of soft-fragmentized coal seam with high-pressure nitrogen slag discharge was carried out.
SUN Yongxin +5 more
doaj +1 more source
Meikuang Anquan, 2022 The gas control in large panel of underground coal mine objectively requires the length of ultra-long directional drilling along the coal seam to reach more than 3 000 m, however, restricted by the current directional drilling technology and equipment in
XU Chao, JIANG Lei, LI Quanxin, FANG Jun, CHEN Pan, LIU Zhi
doaj +1 more source
Effect Evaluation of Nanosilica Particles on O/W Emulsion Properties
Geofluids, 2022 O/W emulsion reinforced by nanosilica particle has good application in hydrocarbon development. However, there are few reports on the influence of nanosilica particles on the oil-water interface of O/W emulsion.
Guanzheng Qu +4 more
doaj +1 more source
Research on rotary geosteering drilling technology and equipment in underground coal mine
Meitan kexue jishu, 2022 In view of the limitations of directional drilling technology and equipment for underground gas drainage in coal mining areas, such as low degree of automation, low drilling ratio of target formation, slow drilling rate of rock formation, and small ...
Ke YAO +7 more
doaj +1 more source
Directional drilling technologies equipment and application for hard rock in underground coal mines
Meikuang Anquan, 2021 According to the problems existing in directional drilling of hard rock in coal mines, such as low drilling efficiency, easy bearing pressure in deep hole drilling and easy damage of drilling tools in hole, based on the analysis of the causes of the ...
DOU Xuqian, WANG Li
doaj +1 more source
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
doaj +1 more source
Semantic-Preserving Mesh Direct Drilling [PDF]
2010 Shape Modeling International Conference, 2010 Advances in modeling of discrete models have allowed the development of approaches for direct mesh modeling and modification. These tools mainly focus on modeling the visual appearance of the shape which is a key criterion for animation or surgical simulation.
Ruding Lou +6 more
openaire +6 more sources