Results 131 to 140 of about 53,263 (253)
Design of Jar Tool for Coiled Tubing Drilling
Shiyou jixie, 2019 In the coiled tubing drilling, due to the characteristics of the coiled tubing, friction self-locking is prone to occur after put on weight, which leads to problems such as low axial force transmission efficiency and difficulty in horizontal section ...
Miao Zhipeng +4 more
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Advanced Science, EarlyView.Peptide‐inspired associative polymers with arginine‐like guanidinium stickers and lysine‐like ammonium spacers undergo chain collapse and liquid‐liquid phase separation induced by reversible sticker associations. Sticker valence and tunable association strength jointly control the phase behavior, chain conformation, and interfacial cohesion of these ...
Seung‐Hwan Oh +7 more
wiley +1 more source
Calculation of Annular Flow Resistance of Coiled Tubing in Slimhole Based on Hyperbolic Model
Shiyou jixie, 2019 Most of the researches on the annulus flow resistance in China are focused on the conventional drilling annulus flow resistance, few study is involved in the calculation of the annular flow resistance of coiled tubing drilling in ø89.0 mm slimhole.
Hou Xuejun +6 more
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Advanced Science, EarlyView.A high‐power hybrid nanogenerator (HP‐HNG) with multi‐degree‐of‐freedom mechanical coupling is reported, integrating multi‐directional wave energy for output to achieve 1 + 1 > 2 energy harvesting. The HP‐HNG achieves a peak output power of 0.764 W, corresponding to a peak power density of 127.303 W m−3. At a wave frequency of 1 Hz, the HP‐HNG delivers
Shuai Ding +9 more
wiley +1 more source
Biocide-mediated corrosion of coiled tubing. [PDF]
PLoS One, 2017 Sharma M +5 more
europepmc +1 more source
Advanced Science, EarlyView.A pneumatic energy‐buffering strategy transforms transient and intermittent footsteps into quasi‐continuous electrical energy for a self‐powered wearable biosensing platform. The footwear‐integrated air‐pumping harvester, combined with the rationally designed power‐management system, powers a wearable ankle PPG device with reduced motion artifacts ...
Ji‐Seok Kim +8 more
wiley +1 more source
The Effects of Boundary Conditions and Friction on the Helical Buckling of Coiled Tubing in an Inclined Wellbore. [PDF]
PLoS One, 2016 Gong Y, Ai Z, Sun X, Fu B.
europepmc +1 more source
Magnetoelectric BaTiO3/CoFe2O4 Thin‐Film Meshes for Neuronal Differentiation
Advanced Science, EarlyView.We engineer an epitaxial BaTiO3/CoFe2O4 magnetoelectric mesh that overcomes boundary‐induced mechanical clamping. Progressively reducing the mechanical constraint, from substrate‐clamped to PDMS‐transferred and ultimately freestanding, enhances magnetic‐to‐electric transduction and strengthens magnetoelectric coupling.
Mathieu Mirjolet +13 more
wiley +1 more source
Diverging Liquid–Liquid Phase Separation Behavior of Different Recombinant Major Ampullate Spidroins
Advanced Science, EarlyView.Fibers spun from the MaSp1‐derivative as well as MaSp1‐MaSp2‐mixtures provide a deeper insight into the assembly process of the spidroins and how hierarchical architectures of spider silk fibers could be achieved. ABSTRACT Spider silk fibers show exceptional mechanical properties, based on their underlying spider silk proteins (spidroins) as well as a ...
Tim Schiller +2 more
wiley +1 more source
Analysis of Fatigue Life of the Coiled Tubing with Ellipsoidal Defect
Shiyou jixie, 2017 To prevent the coiled tubing from breaking down during operation, the fatigue life of the coiled tubing with defects should be predicted. The deformation and fatigue of the coiled tubing with different size of ellipsoid defects without inner pressure ...
Wang Zhenghan, Zhou Zhihong
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