Results 51 to 60 of about 2,605 (265)
Dynamic Mechanical Behavior of Coiled Tubing under Wave Injection Hydraulic Fracturing
Shiyou jixie, 2019 To understand the dynamic mechanical behavior of coiled tubing in wave injection fracturing operation, based on the theory of fluid mechanics and elastic mechanics, the dynamic load and stress model of coiled tubing are established to analyze the ...
Tong Shaokai, Gao Deli
doaj
Study on helical post-buckling of motional coiled tubing in horizontal wells
Journal of Petroleum Exploration and Production TechnologyCoiled tubing is widely used in oil and gas operations. However, the long coiled tubing may undergo sinusoidal or helical buckling deformations, and even lock-up, leading to property damage and serious accidents.
Zhuang Li +3 more
doaj +1 more source
Continuum Mechanics Modeling of Flexible Spring Joints in Surgical Robots
Advanced Robotics Research, EarlyView.A new mechanical model of a tendon‐actuated helical extension spring joint in surgical robots is built using Cosserat rod theory. The model can implicitly handle the unknown contacts between adjacent coils and numerically predict spring shapes from straight to significantly bent under actuation forces.
Botian Sun +3 more
wiley +1 more source
Induced Torque Effect on Helical Buckling of Coiled Tubing
Shiyou jixie, 2018 When subjected to the top end load, the coiled tubing will buckle and will generate induced torque during the subsequent coiled tubing deployment. The induced torque may affect the shape of the coiled tubing and influence the drilling and completion ...
Qin Hua +5 more
doaj
Microstructure and Performance Analysis of 2205 Duplex Phase Stainless Steel Coiled Tubing
Shiyou jixie, 2022 Carbon steel coiled tubing has serious corrosion and low fatigue life in the oil field with the coexistence of H2S and CO2. Therefore, 2205 duplex phase stainless steel coiled tubing with strong corrosion resistance and reasonable matching of strength ...
Wang Haitao +6 more
doaj
Computational analysis of coiled tubing concerns during oil well intervention in the upper Assam basin, India. [PDF]
Sci Rep, 2023 Neog D, Sarmah A, Baruah MIS.
europepmc +1 more source
Waveguide Photoactuators: Materials, Fabrication, and Applications
Advanced Robotics Research, EarlyView.Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi +4 more
wiley +1 more source
Shiyou jixie, 2020 Simulation should be conducted on coiled tubing before horizontal well operation to predict its maximum running depth. Therefore, taking the entire part of the horizontal well from the wellhead to the bottom of the well as the research object, the coiled
Yu Zhijun +6 more
doaj
Experimental study on corrosion resistance of coiled tubing welds in high temperature and pressure environment. [PDF]
PLoS One, 2021 Liu S +4 more
europepmc +1 more source
Advanced Robotics Research, EarlyView.Automated poultry processing lines still rely on humans to lift slippery, easily bruised carcasses onto a shackle conveyor. Deformability, anatomical variance, and hygiene rules make conventional suction and scripted motions unreliable. We present ChicGrasp, an end‐to‐end hardware‐software co‐designed imitation learning framework, to offer a ...
Amirreza Davar +8 more
wiley +1 more source