Author : Mohammed Fayez Al Dushaishi
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (815 download)
Book Synopsis Investigation of Drillstring Vibration Reduction Tools by : Mohammed Fayez Al Dushaishi
Download or read book Investigation of Drillstring Vibration Reduction Tools written by Mohammed Fayez Al Dushaishi and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "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