Fault diagnosis of downhole drilling incidents using adaptive observers and statistical change detection [PDF]
, 2015 Downhole abnormal incidents during oil and gas drilling cause costly delays, and may also potentially lead to dangerous scenarios. Different incidents will cause changes to different parts of the physics of the process. Estimating the changes in physical
Blanke, Mogens +3 more
core +3 more sources
Computational modeling of the nonlinear stochastic dynamics of horizontal drillstrings [PDF]
Computational Mechanics, 2015 This work intends to analyze the nonlinear stochastic dynamics of drillstrings in horizontal configuration. For this purpose, it considers a beam theory, with effects of rotatory inertia and shear deformation, which is capable of reproducing the large displacements that the beam undergoes.
Cunha Jr, Americo +2 more
openaire +3 more sources
Applying the contact element for simulation of interaction between drillstring and holewall
Vietnam Journal of Mechanics, 2003 The purpose of research is to create a contact element in order to simulate the dynamics contact phenomenon of drillstring and drillhole. The contact element is located at some selected node along the drillstring.
Le Phuoc Hao, Ta Quoc Dung
doaj +1 more source
Dynamic Analysis of a Drillstring-Riser System Drilling in Deep Water
MATEC Web of Conferences, 2018 A mathematical model of a drillstring-riser system is developed to analyze the system dynamics when drilling in deep water. For the proposed model, a riser and a drillstring are combined as a pipe-in-pipe structure, along which the interactions between ...
Liao Maolin +4 more
doaj +1 more source
State Dependent Delayed Drill-string Vibration : Theory, Experiments and New Model [PDF]
, 2017 L.J. Pei would like to acknowledge NNSF of China (No.
Kapitaniak, Marcin Tomasz +4 more
core +1 more source
Drillstring Washout Diagnosis Using Friction Estimation and Statistical Change Detection [PDF]
, 2015 In oil and gas drilling, corrosion or tensile stress can give small holes in the drillstring, which can cause leakage and prevent sufficient flow of drilling fluid. If such \emph{washout} remains undetected and develops, the consequence can be a complete
Blanke, Mogens +3 more
core +3 more sources
Torsional vibrations of helically buckled drill-strings : Experiments and FE modelling [PDF]
, 2016 Acknowledgements The authors wish to thank Dr. Joseph Paez Chavez for his help in experimental work and acknowledge the financial support of BG Group plc.Peer reviewedPublisher ...
Hamaneh, V. V. +2 more
core +1 more source
Control of Drilling Vibrations: A Time-Delay System-Based Approach [PDF]
, 2013 International audienceThe main purpose of this study is the control of both axial and torsional vibrations occurring along a rotary oilwell drilling system.
Boussaada, Islam +3 more
core +3 more sources
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