About How is the Jinhua rock drill evaluated
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6 FAQs about [How is the Jinhua rock drill evaluated]
Does rock mechanical strength affect drillability?
The propagation neural network (BPNN), was developed by Sha et al (2014) to improve the prediction accuracy of the ROP, thereby enhancing the generalization ability of the drillability evaluation model. Khandelwal and Armaghani (2016) put emphasis the effect of rock mechanical strength on the corresponding drillability.
Why is hydraulic fracturing used in deep boreholes?
Because it does not require prior knowledge or measurement of the elastic modulus of rocks, hydraulic fracturing is considered the most direct and efficient method for in-situ stress investigation in deep boreholes (Haimson and Cornet 2003; Zhang et al. 2017).
Which geomechanical properties control rock drillability?
This work aims to examine a practical approach to evaluate the geomechanical properties that control rock drillability, such as uniaxial compressive strength (UCS) by utilising some petrophysical parameters (porosity and bulk density) and elastic properties (Young’s modulus, bulk modulus, and slowness).
What is Jinshi drilling?
The main products and business of Jinshi Drilling include geological drill bits & reamers, geological drill pipes & casings, core drilling tools, accessory tools and equipment, full hydraulic drilling rigs, high-end customized drilling tools, drilling demonstration projects, and drilling technical services.
How many hydraulic fracturing measurements were performed in three boreholes?
A total of 17 hydraulic fracturing measurements and 7 impression tests were conducted in three boreholes to estimate the stress state and variation characteristics at different locations 1000 m below the surface.
What is the drillability value of HDR drilling?
Nevertheless, the drillability value of HDR is unclear. The traditional assessment approach of rock drillability is limited in HDR drilling, due to the ultra-high hardness and high temperature, which is significantly different from that in oil reservoirs.