Results 31 to 40 of about 193,780 (356)
Use of the energy of parametric oscillations to improve drilling indices [PDF]
, 2011 Purpose. Increase of the efficiency of using energy of parametric oscillations within the assembly of drilling string bottom by means of solving nonlinear-parametric equations of a “bit – drive motor – drilled-out rock” system to improve drilling indices.
Bakenov +11 more
core +2 more sources
Analysis of development framework of intelligent coal mine underground drilling technology
Gong-kuang zidonghua, 2020 Development and application of intelligent drilling tool and acquisition and analysis of drilling data are outstanding characteristics of intelligent underground drilling.
LI Quanxin, LIU Fei, FANG Ju
doaj +1 more source
Energy Science & Engineering, 2023 Aiming at the application of hydraulic punching technology in soft, low permeability, and high gas coal seams in Changping Coal Mine, there are problems such as large workload, poor permeability enhancement effect, and the formation of “blank zones” in ...
Rui Min +4 more
doaj +1 more source
Drilling Process in γ-TiAl Intermetallic Alloys [PDF]
, 2018 Gamma titanium aluminides (gamma-TiAl) present an excellent behavior under high temperature conditions, being a feasible alternative to nickel-based superalloy components in the aeroengine sector.
Beranoagirre Imaz, Aitor +3 more
core +2 more sources
Design of drilling parameters monitoring system of directional drilling rig in coal mine tunnel
Gong-kuang zidonghua, 2019 In view of problems of deficiencies in real-time display and centralized storage of drilling parameters of full hydraulic directional drilling rig in coal mine tunnel, a drilling parameters monitoring system of directional drilling rig in coal mine ...
FANG Peng
doaj +1 more source
Applied Sciences, 2022 It is generally believed that core discing is a rock failure phenomenon under high in-situ stress, and high stress is closely related to the characteristics of core discing. The core drilling tests of intact granite were conducted on the laboratory servo-
Hua Tang +4 more
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Damage assessment of drilled hybrid composite laminates [PDF]
, 2008 Hole drilling operations are common in fibre reinforced plastics - FRP’s - to facilitate fastener assembly to other parts in more complex structures. As these materials are non-homogeneous, drilling causes some damages, like delamination, for example ...
Durão, Luís M. +3 more
core +2 more sources
Applied Sciences, 2022 With the development of China’s oil and gas exploration and development to complex oil and gas fields, the drilling efficiency and safety of complex formations with large hardness and strong abrasiveness have become increasingly significant.
Chuanzhen Zang +7 more
doaj +1 more source
Optimization of Drilling Process Parameters on Die Steel (H13) using Carbide Coated Drill by Design of Experiment Concept [PDF]
, 2016 This experimental work presents the optimization of process parameter of surface roughness with using coated carbide drill on H13 steel. Taguchi design of experiments was implemented for executing the process parameter of Drilling process on H13 steel ...
Ganesh, J. (J) +3 more
core +1 more source
Assessment of zonal isolation risk to changes in design parameters [PDF]
, 2017 The Well Containment Screening Tool (WCST) focuses on well integrity evaluation after well control incident. The WCST favors a greater wall thickness and, hence, a narrower cementing annulus, potentially increasing the risk of cement loss.
Zhang, Huidong, active 21st century
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