Results 271 to 280 of about 140,868 (311)

Research on the type and expansion mechanism of internal cracks in rocks under the action of PDC. [PDF]

Sci Rep
Liang Y, Du B, Ren J, Feng S.
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A clean self-diverting acid for carbonate reservoir in deep wells at high temperatures and its performance evaluation. [PDF]

Sci Rep
Gao X, Wang M, Shi X, Li B, Mao J, Valerievich PV.   +5 more
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Structural characteristics of the slurry-filled receptive zone in longwall goaf filled with gangue slurry. [PDF]

Sci Rep
Zhao M, Zhu L, Liu C, Gu W, Liu Z.
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Integrated stimulation technology for ultra deep tight sandstone gas reservoirs with ultra low permeability in Sichuan Xujiahe formation. [PDF]

Sci Rep
Li S, Long Y, Chen C, Ren H, Chang Y, Zhuo S, Yin N, Luo C, Lu W.   +8 more
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The improved rock breaking efficiency of an annular-groove PDC bit

Journal of Petroleum Science and Engineering, 2019
Abstract To solve a major problem faced by drilling technicians, that of how to improve rock breaking efficiency in complex strata, this paper introduces a polycrystalline diamond compact (PDC) drill bit with a special structure. Static-pressure breaking tests show that the breaking work ratio of a single tooth on a ridge is much smaller than that on
Kuilin Huang, Zhijiu Ai, Yingxin Yang, Zongliang Xie   +3 more
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Experimental and simulation study on rock-breaking efficiency of disc cutters on composite rocks

International Journal of Rock Mechanics and Mining Sciences, 2022
Sen Wen, Chunshun Zhang
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Factor analysis and numerical simulation of rock breaking efficiency of TBM deep rock mass based on orthogonal design

Journal of Central South University, 2022
Xiao-jing Li, Hua-ken Zhang, Yi-fan Bai, Xiang-yang Zhang   +3 more
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A new index of rock-breaking tool efficiency

Journal of Mining Science, 2016
Based on the analysis of qualitative interaction between rocks and a rock-breaking tool, a new coefficient of the tool efficiency is proposed. This coefficient makes it possible to estimate the quality of the tool impact on broken rocks and to predict energy input of rock breaking and, consequently, productivity of mining machines in specific ...
B. L. Gerike, V. I. Klishin, P. B. Gerike   +2 more
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THE EFFECT OF ROCK BIT CUTTING STRUCTURE ON ROCK BREAKING EFFICIENCY

Proceedings of International Meeting on Petroleum Engineering, 1986
ABSTRACT A study of the effect of rock bit cutting structure on rock breaking efficiency was made with full scale bits for soft to medium formations on a laboratory testing rig. An analysis of the relationship between rock breakage and cutting structure based on the drilling rate, bottom hole pattern and operating parameters revealed the
Jikang Hou, Zhaofeng Luo
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Three-dimensional simulation of rock breaking efficiency under various impact drilling loads

Arabian Journal of Geosciences, 2020
Percussion drilling is believed to be an efficient way to enhance the drilling performance, compared with the conventional drilling in deep wells, which could be achieved by applying impact loads above the drill bit. The finite simulation is an efficient method to predict the drilling performance when the drill bit interacts with rocks. In contrast, as
Yandong Yang, Hualin Liao, Jilei Niu, Zhen Wang, Junhai Chen   +4 more
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