Results 71 to 80 of about 1,682 (251)
Feasibility study of logging-while-drilling boundary detection using electric dipole antenna
Frontiers in Earth ScienceThe critical need for deep boundary detection in complex hydrocarbon reservoirs drives the advancement of Logging-while-drilling (LWD) azimuthal electromagnetic measurement (AEM). New deep detection tools employ open-loop half-circle electric dipole (ED)
Changhong Fan +9 more
doaj +1 more source
Pre‐Curved Everting Robots With Embedded Steering Intelligence Fabricated by CO2 Laser Welding
Advanced Intelligent Systems, EarlyView.Design and experimental demonstration of a laser welded growing robot for anatomically guided navigation. The robot follows an aortic arch phantom entering the branchiocephalic branch through steering by design. The figure shows the physical phantom setup, CAD defined weld geometry and full robot eversion.
Brandon Saldarriaga +5 more
wiley +1 more source
Petroleum Exploration and DevelopmentDuring drilling operations, the low resolution of seismic data often limit the accurate characterization of small-scale geological bodies near the borehole and ahead of the drill bit.
Sanyi YUAN +4 more
doaj +1 more source
Annals of Neurology, EarlyView.Objectives The interleukin (IL)‐1, IL‐6, and C‐reactive protein (CRP) pathway is central to the immune response after intracerebral hemorrhage (ICH). We tested for associations between hematoma and plasma cytokine concentrations and patient outcomes in Minimally Invasive Surgery Plus Rt‐PA for ICH Evacuation Phase III (MISTIE III) participants ...
Adrian R. Parry‐Jones +54 more
wiley +1 more source
Monopole Acoustic Logging While Drilling Acoustic Insulator Based on Labyrinthine Grooved Structure
Cejing jishuIn acoustic logging while drilling (ALWD), the presence of a thick-walled drill collar inspires significant amplitude drill collar waves, which will interfere with the measurement and acquisition of formation information.
DOU Yifan, ZHANG Chao, GUAN Wei
doaj +1 more source
A review of mud pulse telemetry signal impairments modeling and suppression methods
Journal of Petroleum Exploration and Production Technology, 2018 Exploration and drilling operations are the most costly and risky activities that require logging while drilling effective tool operation and high speed real-time data transmission.
Saleh M. Mwachaka +2 more
doaj +1 more source
Key surface logging technologies in horizontal well geosteering
Petroleum Exploration and Development, 2012 In the drilling of horizontal wells, the core task of surface logging is to guide geosteering while drilling by using collected data including electrical property, lithology, petrophysics, and oil/gas-bearing properties. Surface logging in the horizontal
Yichao Li +3 more
doaj +1 more source
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT Silver‐doped cerium oxide nanoparticles (Ag/CeO2 NPs) were synthesized using Ricinus communis seed extract as a bio‐derived fuel in a solution combustion method. The combustion reaction, carried out at 450°C with AgNO3 and (NH4)2[Ce (NO3)6] as metal precursors, produced CeO2 and Ag/CeO2 NPs.
T. N. Ravishankar +5 more
wiley +1 more source
The Anatomical Record, EarlyView.Abstract The Pleistocene is a key period for understanding the evolutionary history and palaeobiogeography of the European rabbit (Oryctolagus cuniculus). The species was first documented in southeastern Iberia at the beginning of the Middle Pleistocene and appears to have rapidly spread throughout Southwestern Europe, where it was found in numerous ...
Maxime Pelletier
wiley +1 more source
Archaeological Prospection, EarlyView.ABSTRACT Below the classical fortress of Samikon at the coast of the western Peloponnese, ancient writer Strabo mentioned a sanctuary of Poseidon which served as the centre of the religious association of the Triphylian cities. In this paper, we describe the discovery and investigation of a building structure by means of geophysical and ...
Dennis Wilken +10 more
wiley +1 more source