Results 11 to 20 of about 138 (127)
Kinematics and dynamics analysis of new rotary-percussive PDM drilling tool
Journal of Low Frequency Noise, Vibration and Active Control, 2021 This paper presents a new drilling tool with multidirectional and controllable vibrations for enhancing the drilling rate of penetration and reducing the wellbore friction in complex well structure. Based on the structure design, the working mechanism is
Jialin Tian +5 more
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Vertical section construction of wells at Kuyumbinsky oil field via percussive-rotary drilling with DTH hammer. [PDF]
IOP Conference Series: Earth and Environmental Science, 2016 The article presents the analysis of sequential use of mobile percussive-rotary drilling sets with DTH hammer and bottom-hole cleaning by foam mud in construction of vertical sections along with at Kuyumbinsky oil field. On the basis of the analysis, an engineering solution is proposed to prevent disastrous mud loss that is the key factor of efficiency
Buzanov, K. V. +2 more
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Shock and Vibration, 2017 Based on an optimized lunar regolith coring bit (LRCB) configuration, the load characteristics of rotary-percussive drilling of lunar rock simulant in a laboratory environment are analyzed to determine the effects of the drilling parameters (the ...
Peng Li +3 more
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Impact Dynamics of a Percussive System Based on Rotary-Percussive Ultrasonic Drill
Shock and Vibration, 2017 This paper presents an impact dynamic analysis of a percussive system based on rotary-percussive ultrasonic drill (RPUD). The RPUD employs vibrations on two sides of one single piezoelectric stack to achieve rotary-percussive motion, which improves ...
Yinchao Wang +5 more
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Energies, 2023 Down-the-hole (DTH) hammer drilling with reverse circulation is a novel, mobile, high-speed drilling system suitable for the specific requirements of mine rescue. This technology can be applied to shorten the rescue time during mine accidents.
Kun Bo +4 more
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Rotary ultrasonic machining of rocks: An experimental investigation
Advances in Mechanical Engineering, 2018 Rock drilling is widely used to explore and mine energy resources. It has also been used to extract samples to study the earth’s geological composition and topography and to explore different planets.
PKSC Fernando, Meng Zhang, Zhijian Pei
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Impact Dynamics Prediction of a Rotary-Percussive Ultrasonic Drill With a Free Mass
IEEE Access, 2018 The rotary-percussive ultrasonic drill (RPUD) employs vibrations on two sides of a piezoelectric stack to drive a drill tool to achieve simultaneous rotary-percussive motion.
Deen Bai +5 more
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Rock Breaking Analysis and Process Parameter Optimization of Pneumatic DTH Hammer Bit
Shiyou jixie, 2022 In order to improve the rock-breaking efficiency and penetration ability of pneumatic DTH hammer in hard strata, based on the theory of nonlinear contact dynamics, the ABAQUS software was used to build a piston-pneumatic DTH hammer bit-rock(granite ...
Wang Shenglin +5 more
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Shiyou jixie, 2020 High-speed rotary percussive drilling technology is a new type of high-efficiency rock breaking technology based on PDM drilling and self-oscillating rotary percussive drilling.
Yu Yang, Liu Shiyin
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International Journal of Mining Science and Technology, 2017 Drill machines used in surface mines, particularly in coal, is characterized by a very poor utilization (around 40%) and low availability (around 60%).
Suraj Kumar +2 more
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