Results 31 to 40 of about 1,143,416 (115)
Nonlinear Dynamic Characteristic Analysis of a Landing String in Deepwater Riserless Drilling
Shock and Vibration, Volume 2018, Issue 1, 2018., 2018 The landing string is an important component of deepwater riserless drilling systems. Determination of the dynamic characteristics of the landing string plays an essential role in its design for ensuring its safe operation. In this paper, a dynamic model is developed to investigate the dynamic response characteristics of a landing string, where a ...
Jun Liu +5 more
wiley +1 more source
Shock and Vibration, Volume 2014, Issue 1, 2014., 2014 In the oil industry, the accompanied reverberation is a major constraint in the transmission rate and distance because the drillstring is a heterogeneous assembly. Based on the transient impulse responses in uplink and downlink channels, an improved simplified echo suppression model with two acoustic receivers is presented in consideration of position ...
Li Cheng +4 more
wiley +1 more source
The effect of well path, tortuosity and drillstring design on the transmission of axial and torsional vibrations from the bit and mitigation control strategies [PDF]
, 2018 As well designs become increasingly complicated, a complete understanding of drillstring vibrations is key to maximize drilling efficiency, to reduce drillstring dysfunction and to minimize drillstring, tool, and borehole damage.
Shor, Roman J.
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Hydromechanical method of control of drillstring torsional vibrations
Journal of Physics, Conference Series, 2020 The article discusses issues related to the vibrations of drillstring (DS). The relevance of the fight against torsional fluctuations DS and the reasons for their occurrence are analyzed. The hydromechanical method of control of torsional oscillations DS
K. Bashmur +6 more
semanticscholar +1 more source
Shock and Vibration, Volume 2014, Issue 1, 2014., 2014 A new method of wireless data telemetry used by oil industry uses compressional acoustic waves to transmit downhole information from the bottom hole to the surface. Unfortunately, acoustic echoes and drilling vibration noises in periodic drillstring are a major issue in transmission performance.
Li Cheng +5 more
wiley +1 more source
Drillstring Dynamics - Comparative analysis between a lumped element model s ability to recreate axial vibrations observed from measurements of dynamic strain using small-scale drillstring model [PDF]
, 2016 Lumped element models are desirable for their mathematical simplicity and their practical application for simulating axial vibrations. These models however only approximate the dynamic behavior, and is why real time measurements are essential for ...
Løklingholm, Thomas
core +1 more source
Analysis of Nonlinear Vibration of Hard Coating Thin Plate by Finite Element Iteration Method
Shock and Vibration, Volume 2014, Issue 1, 2014., 2014 This paper studies nonlinear vibration mechanism of hard coating thin plate based on macroscopic vibration theory and proposes finite element iteration method (FEIM) to theoretically calculate its nature frequency and vibration response. First of all, strain dependent mechanical property of hard coating is briefly introduced and polynomial method is ...
Hui Li +3 more
wiley +1 more source
Investigation on the Effect of Drillstring Stiffness on Downscaling Drillstring Vibrations [PDF]
, 2021 Drillstring vibrations provide one of the most important challenges to drilling efficiency today. These vibrations can cause many issues such as decreased energy transfer from the to drive to the bit, fluctuating drilling parameters, and damage to the ...
Yancey, Jake
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Impact Force Magnitude Analysis of an Impact Pendulum Suspended in a Vibrating Structure
Shock and Vibration, Volume 19, Issue 6, Page 1359-1372, 2012., 2012 The purpose of this work is the experimental investigation and the mathematical modeling of the impact force behavior in a vibro‐impact system, where an impact pendulum is mounted on a cart that moves with a prescribed displacement. The dynamics of the system will be evaluated considering different excitation frequencies and changing the impact gap ...
R.R. Aguiar, H.I. Weber
wiley +1 more source
An Experimental, Modeling and Machine Learning Based Investigation of Stick-Slip Vibrations
, 2022 Drilling technologies have improved considerably since the first well drilled by Colonel E.L Drake in 1859. Drilling technologies enable us to safely drill complex well profiles with advanced downhole tools and sensors to reach target zones faster ...
Srivastava, Saket
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