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Analysis of Downhole Drilling Vibrations

Author : Ziad Abdullrahman Alabdullatif

Publisher :

Page : 198 pages

File Size : 12,44 MB

Release : 2011

Category :

ISBN :

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Book Description

Downhole vibrations lead to downhole failures and decrease the rate of penetration (ROP). The bottom hole assembly (BHA) static and dynamic design is a key factor in optimizing drilling operations. The BHA should be designed to minimize the vibration levels in the axial, lateral, and torsional directions. This would be achieved by avoiding rotating the drillstring in the speeds that are nearby the natural frequency of BHA. The complexity associated with current BHA components requires using advanced computational tools that are capable of solving complex and time-consuming equations. Finite Element Analysis (FEA) is the most used technique in analyzing vibration behavior of the drillstring by mesh discretizing of a continuous body into small elements. This thesis will study the dynamic behavior of different BHA designs for Manifa and Karan fields of Saudi Aramco to optimize the drilling operations. The FEA software that will be used to conduct these studies is called Vibrascope, which was developed by NOV. The software will determine the critical speeds of the drillstring that should be avoided to prevent resonance of the BHA, which will lead to severe downhole vibration.



Analysis and Control of Oilwell Drilling Vibrations

Author : Martha Belem Saldivar Márquez

Publisher : Springer

Page : 294 pages

File Size : 17,66 MB

Release : 2015-03-09

Category : Technology & Engineering

ISBN : 3319157477

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Book Description

This book reports the results of exhaustive research work on modeling and control of vertical oil well drilling systems. It is focused on the analysis of the system-dynamic response and the elimination of the most damaging drill string vibration modes affecting overall perforation performance: stick-slip (torsional vibration) and bit-bounce (axial vibration). The text is organized in three parts. The first part, Modeling, presents lumped- and distributed-parameter models that allow the dynamic behavior of the drill string to be characterized; a comprehensive mathematical model taking into account mechanical and electric components of the overall drilling system is also provided. The distributed nature of the system is accommodated by considering a system of wave equations subject to nonlinear boundary conditions; this model is transformed into a pair of neutral-type time-delay equations which can overcome the complexity involved in the analysis and simulation of the partial differential equation model. The second part, Analysis, is devoted to the study of the response of the system described by the time-delay model; important properties useful for analyzing system stability are investigated and frequency- and time-domain techniques are reviewed. Part III, Control, concerns the design of stabilizing control laws aimed at eliminating undesirable drilling vibrations; diverse control techniques based on infinite--dimensional system representations are designed and evaluated. The control proposals are shown to be effective in suppressing stick-slip and bit-bounce so that a considerable improvement of the overall drilling performance can be achieved. This self-contained book provides operational guidelines to avoid drilling vibrations. Furthermore, since the modeling and control techniques presented here can be generalized to treat diverse engineering problems, it constitutes a useful resource to researchers working on control and its engineering application in oil well drilling.





Investigation of Drillstring Vibration Reduction Tools

Author : Mohammed Fayez Al Dushaishi

Publisher :

Page : 0 pages

File Size : 19,67 MB

Release : 2012

Category : Oil well drilling rigs

ISBN :

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Book Description

"Drilling related problems such as drillstring vibration is an important cause of premature failure of drillstring components and drilling inefficiency. The vibration of drillstring interferes with measurement collected while drilling. In severe cases, drillstring vibration will lead to wellbore instability that will result in an increase in the operation cost. In the late 1980's, a lot of studies and techniques were developed to mitigate drillstring vibration and downhole vibration measurements were introduced to the industry in two forms; real time measurements and memory devices measurements. A study of drillstring vibration of three different wells located in the Norwegian North Sea was analyzed. The bottom hole assembly (BHA) of two wells consisted of anti-vibration technology. The study involved a verification of anti stalling technology (AST) and V-stab vibration reduction tools. Part of the study illustrates the different in lateral vibration in different wells of matching lithology which include a statistical analysis of anti-vibration tools performance. Finally, a statistical analysis was conducted on downhole vibration measurement to investigate the sampling rate of the device. Alternating lithology has a big impact on lateral vibration; however, lateral vibration is not the same for different wells in the same formations due to the difference in the BHA assemblies. The study showed that lateral vibration using the V-stab was lower than the one using the AST tool. Considering torsional vibration, the analysis reveled [sic] that V-stab has a lower stick/slip severity than the AST tool. The field study showed that the roller-cone bit generates less torsional vibration than the PDC bit due to different cutting actions. One of the important findings was that there was no correlation between drillstring vibration and mechanical specific Energy (MSE)"--Abstract, leaf iii



Proceedings of DINAME 2017

Author : Agenor de T. Fleury

Publisher : Springer

Page : 553 pages

File Size : 39,54 MB

Release : 2018-07-20

Category : Technology & Engineering

ISBN : 3319912178

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Book Description

This book presents the most significant contributions to the DINAME 2017 conference, covering a range of dynamic problems to provide insights into recent trends and advances in a broad variety of fields seldom found in other proceedings volumes. DINAME has been held every two years since 1986 and is internationally recognized as a central forum for discussing scientific achievements related to dynamic problems in mechanics. Unlike many other conferences, it employs a single-session format for the oral presentations of all papers, which limits the number of accepted papers to roughly 100 and makes the evaluation process extremely rigorous. The papers gathered here will be of interest to all researchers, graduate students and engineering professionals working in the fields of mechanical and mechatronics engineering and related areas around the globe.



A Primer for Deterministic and Stochastic Drill-String Vibration Analyses

Author : Mark Iosifovich Freĭdlin

Publisher : Springer

Page : 260 pages

File Size : 22,23 MB

Release : 1992

Category : Mathematics

ISBN :

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Book Description

This is the first book dedicated to oil well drilling vibrations. The objectives are to provide an exposition to important concepts in drilling and drilling dynamics, and to describe both deterministic and probabilistic solution techniques that may be used to gain insight in downhole vibrations. These considerations are addressed based on a collection of drilling technical publications; an exhaustive literature review. Appendices include a detailed description of the mode superposition method, and a technique to generate trivariate random processes with digital filters.



Wave Propagation in Petroleum Engineering

Author : Wilson C. Chin

Publisher : Butterworth-Heinemann

Page : 416 pages

File Size : 28,58 MB

Release : 1994

Category : Technology & Engineering

ISBN :

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Book Description

Following an introductory section dealing with fundamentals and classical examples, Wave Propagation in Petroleum Engineering concentrates on drillstring vibrations, borehole acoustics, swab-surge, measurement-while-drilling (MWD), geophysics, and ocean hydrodynamics. Many research results appear in print for the first time. For example, this book explains why severe lateral vibrations downhole cannot be seen at the surface, develops axial vibration models that simulate rate-of-penetration and bit-bounce, provides formulations for coupled axial, torsional, and bending vibrations, including validating computational solutions, and introduces basic notions for use in formation imaging; applies modern concepts from kinematic wave theory to geophysical and hydrodynamic problems, e.g., ray tracing in attenuative media, extended eikonal equations for use when Fermat's principle of least time breaks down, and powerful new methods for wave-current interaction and energy transfer analysis; and develops the fundamentals of MWD mud pulse telemetry, dynamic swab and surge, and borehole acoustics from first principles.



Seismic While Drilling

Author : F.B. Poletto

Publisher : Pergamon

Page : 546 pages

File Size : 40,68 MB

Release : 2004-07-14

Category : Science

ISBN : 9780080439280

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Book Description

The purpose of this book is to give a theoretical and practical introduction to seismic-while-drilling by using the drill-bit noise. This recent technology offers important products for geophysical control of drilling. It involves aspects typical of borehole seismics and of the drilling control surveying, hitherto the sole domain of mudlogging. For aspects related to the drill-bit source performance and borehole acoustics, the book attempts to provide a connection between experts working in geophysics and in drilling. There are different ways of thinking related to basic knowledge, operational procedures and precision in the observation of the physical quantities. The goal of the book is to help "build a bridge" between geophysicists involved in seismic while drilling - who may need to familiarize themselves with methods and procedures of drilling and drilling-rock mechanics - and drillers involved in geosteering and drilling of "smart wells" - who may have to familiarize themselves with seismic signals, wave resolution and radiation. For instance, an argument of common interest for drilling and seismic while drilling studies is the monitoring of the drill-string and bit vibrations. This volume contains a large number of real examples of SWD data analysis and applications.



Experimental Investigation of the Effect of Axial Vibration Generated by Pressure Pulses on Drilling Performance

Author : Ahmed Elnahas

Publisher :

Page : pages

File Size : 14,62 MB

Release : 2014

Category :

ISBN :

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Book Description

Considering the fact that improving drilling efficiency contributes to the industry success, many academic organizations, industrial research organizations and companies have invested in research that leads to better drilling experience, time wise and efficiency wise. This thesis is a research based study that aims to find new methods to improve drilling efficiency. The study investigates the effect of vibration generated using periodic pressure pulses created at the bit by a down-hole tool on the drilling efficiency, and in fact demonstrates that the technology can improve drilling efficiency. The study is based on various sets of laboratory experiments, which were conducted to characterize the functionality of a Pressure Pulses Generating (PPG) down-hole tool, and to test the effect of the down-hole tool output on actual drilling experiments. Two different setups were used to conduct the experiments in laboratory environment. In the drilling experiments synthetic rock was used as test specimens with highly controlled properties and strength. The drilling experiments were conducted at different simulated down-hole condition, including bottom hole pressures, and different fluid flow rates. The study also highlighted the effect of varying the drill string compliance on the overall effect of induced down-hole axial vibration. Finally the study sets base for further investigation and experiment that will be conducted using a bigger scale setup similar to land drill rigs.



Drilling Engineering Problems and Solutions

Author : M. E. Hossain

Publisher : John Wiley & Sons

Page : 551 pages

File Size : 13,7 MB

Release : 2018-06-19

Category : Science

ISBN : 1118998642

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Book Description

Completely up to date and the most thorough and comprehensive reference work and learning tool available for drilling engineering, this groundbreaking volume is a must-have for anyone who works in drilling in the oil and gas sector. Petroleum and natural gas still remain the single biggest resource for energy on earth. Even as alternative and renewable sources are developed, petroleum and natural gas continue to be, by far, the most used and, if engineered properly, the most cost-effective and efficient, source of energy on the planet. Drilling engineering is one of the most important links in the energy chain, being, after all, the science of getting the resources out of the ground for processing. Without drilling engineering, there would be no gasoline, jet fuel, and the myriad of other "have to have" products that people use all over the world every day. Following up on their previous books, also available from Wiley-Scrivener, the authors, two of the most well-respected, prolific, and progressive drilling engineers in the industry, offer this groundbreaking volume. They cover the basic tenets of drilling engineering, the most common problems that the drilling engineer faces day to day, and cutting-edge new technology and processes through their unique lens. Written to reflect the new, changing world that we live in, this fascinating new volume offers a treasure of knowledge for the veteran engineer, new hire, or student. This book is an excellent resource for petroleum engineering students, reservoir engineers, supervisors & managers, researchers and environmental engineers for planning every aspect of rig operations in the most sustainable, environmentally responsible manner, using the most up-to-date technological advancements in equipment and processes.