Demagnetizing the drill string magnetic interference in Far North and in Pakistan
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Petroleum Exploration and Production Technology"
DOI: 10.1007/s13202-019-00801-7
Abstract: Drilling in Barents Sea proves to be a challenging task, as this region is situated in auroral zones having high geomagnetic latitude, where magnetic interferences develop from magnetic field and magnetic materials inside subsurface are… read more here.
Keywords: string magnetic; interference; demagnetizing drill; drill string ... See more keywords
Mechanical Behaviors of Bottom Hole Assembly with Bent-Housing Positive Displacement Motor Under Rotary Drilling
Sign Up to like & getrecommendations! Published in 2019 at "Arabian Journal for Science and Engineering"
DOI: 10.1007/s13369-017-2564-5
Abstract: Abundant drilling activities had confirmed that the fully rotary drilling can improve the rate of penetration effectively. However, the fully rotary drilling has brought some challenges for the trajectory control ability of the bottom hole… read more here.
Keywords: drilling; rotational speed; bent housing; drill string ... See more keywords
A non-linear Cosserat rod model for drill-string dynamics in arbitrary borehole geometries with contact and friction
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Mechanical Sciences"
DOI: 10.1016/j.ijmecsci.2019.04.023
Abstract: Abstract A model for drill-string dynamics in arbitrary borehole geometries based on the Cosserat rods theory is presented. The objective of this work is to exploit the capabilities of the Cosserat rods to capture the… read more here.
Keywords: drill string; arbitrary borehole; model; friction ... See more keywords
Buckling of a drill-string in two-sectional bore-holes
Sign Up to like & getrecommendations! Published in 2020 at "International Journal of Mechanical Sciences"
DOI: 10.1016/j.ijmecsci.2020.105427
Abstract: Abstract The nature of the phenomena of drill-strings buckling in channels of deep curvilinear bore-holes is essentially complicated by complex combination of acting distributed forces (gravity, contact and friction), large length of the string (leading… read more here.
Keywords: bore hole; geometry; drill string; buckling drill ... See more keywords
Nonlinear dynamic modeling of drill string in horizontal well - A geometrically exact approach
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Petroleum Science and Engineering"
DOI: 10.1016/j.petrol.2018.09.022
Abstract: Abstract A new nonlinear dynamic model of drill string in horizontal well is established based on geometrically exact beam theory and quadrature element method. The model proposed in this paper takes into account the geometric… read more here.
Keywords: nonlinear dynamic; geometrically exact; string horizontal; drill string ... See more keywords
The impact of multidirectional excitation on the stick–slip vibration characteristics of a drill string
Sign Up to like & getrecommendations! Published in 2025 at "Scientific Reports"
DOI: 10.1038/s41598-025-13880-w
Abstract: Stick–slip vibration is a common phenomenon in ultra-deep drilling that significantly impacts the failure of both drill bits and drill tools. The most direct and efficacious approach to alleviating the stick–slip vibration of the drill… read more here.
Keywords: stick slip; slip vibration; excitation; vibration ... See more keywords
Vibration behavior analysis of reamers based on drill string dynamics
Sign Up to like & getrecommendations! Published in 2025 at "Scientific Reports"
DOI: 10.1038/s41598-025-23426-9
Abstract: An integrated drill string-reamer dynamics model incorporating full-wellbore mechanics was established to characterize Reaming While Drilling vibration mechanisms. The model integrates multi-body dynamics software for constructing reamer geometric configurations and cutter mechanical interactions, with validation… read more here.
Keywords: analysis reamers; vibration suppression; vibration; drill string ... See more keywords
Gated multilayer perceptron Bayesian fusion network: A geological uncertainty-aware network for rate of penetration prediction in the nonlinear dynamic system of drill string-formation
Sign Up to like & getrecommendations! Published in 2025 at "Physics of Fluids"
DOI: 10.1063/5.0289249
Abstract: Accurate prediction of rate of penetration (ROP) under complex geological conditions is a critical task in geological drilling operations, yet it remains challenging due to the nonlinear relationship of drill string dynamics and uncertainty inherent… read more here.
Keywords: rate penetration; prediction; multilayer perceptron; uncertainty ... See more keywords
Coupled effects of swirl flow and drill-string vibration on deepwater wellbore temperature and cooling optimization
Sign Up to like & getrecommendations! Published in 2025 at "Physics of Fluids"
DOI: 10.1063/5.0302549
Abstract: Accurate prediction of the wellbore temperature field in deepwater drilling is essential for operational safety. A few existing studies have considered the coupled effects of swirling flow and drill-string vibration, making it difficult to accurately… read more here.
Keywords: drill string; vibration; wellbore temperature; deepwater ... See more keywords
Hybrid Interval Type-2 Fuzzy PID+I Controller for a Multi-DOF Oilwell Drill-String System
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Access"
DOI: 10.1109/access.2022.3185021
Abstract: The control of multibody drill-string systems is not easy and designing such systems is considered challenging because of the difficulty in the dynamic analysis of its nonlinear characteristics and parametric uncertainties. An optimal hybrid interval… read more here.
Keywords: system; drill string; control; type fuzzy ... See more keywords
Control of Axial–Torsional Dynamics of a Distributed Drilling System
Sign Up to like & getrecommendations! Published in 2024 at "IEEE Transactions on Control Systems Technology"
DOI: 10.1109/tcst.2023.3298255
Abstract: Self-excited vibrations in drill-string systems are one of the main causes of failure and efficiency reduction in drilling operations. To suppress these vibrations, an active control strategy is proposed in this article based on a… read more here.
Keywords: system; control; drill string; controller ... See more keywords