Results 31 to 40 of about 141,733 (202)

Recognition and Application of Wear Detection BTA Deep Hole Drilling

Journal of Harbin University of Science and Technology, 2018
BAT deep-hole drill is a typical inner-chip removal drill，which is processed in a large amount and the machining process is closed． In view of the deficiency of the industrial field BTA deep hole drilling wear artificial detection error，the wear of BTA ...
WU Xue-feng, WU Tong-kun, YANG Shu-cai, YUAN Zhong-liang   +3 more
doaj   +1 more source

Technology of gas extraction by deep hole directional drilling in underground coal mine and its applicatio

Gong-kuang zidonghua, 2019
In order to solve problems of slow tunneling and tension of mine excavation replacement in test mine using traditional extraction technology, a scheme of using deep hole directional drilling with long directional drilling instead of conventional drilling
MA Xiaomin
doaj   +1 more source

Experimental study on directional drilling with high pressure nitrogen in soft-fragmentized coal seam of Wangpo Coal Mine

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, ZHANG Jie, MA Qiang, HUANG Hanjing, ZHANG Yazhou, WANG Jianqiang   +5 more
doaj   +1 more source

Research on heat transfer optimization of heat sink based on phase change isothermal technology for deep hole drilling machine

机车电传动, 2023
Based on the phase change isothermal technology for deep hole drilling machine, a research methodology involving numerical simulation and experimental testing was applied to optimize the heat transfer design of a heat sink for a rail transit project with
DOU Zechun, YAN Juncai, WU Zhiyong, WANG Xiong, FU Hangjie, DING Yun   +5 more
doaj  

Effect of chips on drilling process when drilling C/SiC ceramic matrix composite holes with brazed diamond abrasive drill

Jin'gangshi yu moliao moju gongcheng, 2022
Brazed diamond abrasive drill was suitable for drilling holes in carbon fiber reinforced silicon carbide ceramic matrix composites, but a large amount of chips could adversely affect the drilling process of the holes.
Guodong SHAO, Zhenyu SHI
doaj   +1 more source

Near-dry deep hole drilling with BTA tool (On the boring into aluminum alloy and steel with prepared hole)

Nihon Kikai Gakkai ronbunshu, 2015
Near-dry cutting is a key technology to decrease in the usage of cutting fluid. A lot of research achievements revealed that near-dry cutting technology was available, and we hope this technology will contribute to the improvement of the working ...
Koji AKASHI, Daisuke ISHIMARU, Fukuto NAGATA   +2 more
doaj   +1 more source

Ultra-Deepwater Riserless Mud Circulation with Dual Gradient Drilling [PDF]

Scientific Drilling, 2008
Drilling deep holes in very deep water presents the offshore drilling community with major wellbore stability challenges that are typically mitigated through the circulation of dense drilling mud to prevent hole collapse and to remove drilling debris ...
Greg Myers
doaj   +1 more source

Subsurface conditioning in BTA deep hole drilling for improved component performance

Production Engineering
When bores with high length-to-diameter ratios (l/D > 10) and large diameters (D > 40 mm) are required, usually, the Boring and Trepanning Association (BTA) deep hole drilling process is used.
S. Strodick, Robert Schmidt, Kai Donnerbauer, J. Rozo Vasquez, A. Zabel, Marina Macias Barrientos, Dirk Biermann, Frank Walther   +7 more
semanticscholar   +1 more source

Numerical and experimental analysis of margin geometries of twist drills in deep hole machining operations

Advances in Industrial and Manufacturing Engineering, 2023
In deep hole machining operations with twist drills, whirling vibrations lead to a significant increase in hole diameter deviation and circularity error.
Christopher Krebs, Dennis Heyser, Bernhard Schweizer, Marcel Volz, Eberhard Abele, Matthias Weigold   +5 more
doaj   +1 more source

Spray sealing technology for gas extraction drilling

Gong-kuang zidonghua, 2021
The sealing quality of extraction drilling is the key factor affecting gas extraction and outburst elimination. In order to solve the problems of poor quality of passive hole sealing, low gas concentration in drilling and extraction, and cumbersome ...
KONG Weiyi1, ZHAO Heping1, IU Quanlin2, ZHOU Xin2   +3 more
doaj   +1 more source