Study on the Dual Enhancement Effect of Nanoparticle-Surfactant Composite Systems on Oil Recovery Rates. [PDF]
Nanomaterials (Basel)Li G, Huang B, Yuan Y, Fu C, Wang K.
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Research on the type and expansion mechanism of internal cracks in rocks under the action of PDC. [PDF]
Sci RepLiang Y, Du B, Ren J, Feng S.
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Evolution of Overburden Fractures and the Water-Conducting Fracture Zone in Closely Spaced Coal Mine Seams under Highly Water-Rich Aquifers. [PDF]
ACS OmegaLiu X +6 more
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Research on surrounding rock control technology of roof cutting and pressure relieving for roadside filling in gob-side entry retaining of large mining height panel. [PDF]
Sci RepWeiyong L +5 more
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The improved rock breaking efficiency of an annular-groove PDC bit
Journal of Petroleum Science and Engineering, 2019Abstract 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
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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, 2022Sen Wen, Chunshun Zhang
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A new index of rock-breaking tool efficiency
Journal of Mining Science, 2016Based 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 ...
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Three-dimensional simulation of rock breaking efficiency under various impact drilling loads
Arabian Journal of Geosciences, 2020Percussion 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
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