Drill pipe fatigue analysis in offshore application

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Title: Drill pipe fatigue analysis in offshore application
Author: Majumdar, Barun Kanti
Abstract: It is well known that the ball joint in marine riser can cause fatigue damage in the drill pipe passing through it . Previous investigators have assessed the damage done for a lower ball joint angle of 3 -5 degrees (drilling ) and 1 -3 degrees (running casing ) . This research extends that work to deepwater operations in which an upper ball joint is also present . Also , it is shown , via finite element models , that tool joint bending stiffness has a significant effect on fatigue life . Fatigue damage calculations including this heretofore unconsidered effect are presented for various ball joint angles and drill pipe tensions .
URI: http : / /hdl .handle .net /2346 /12186
Date: 1986-12


Majumdar, Barun Kanti Drill pipe fatigue analysis in offshore application. Master's thesis, Texas Tech University. Available electronically from http : / /hdl .handle .net /2346 /12186 .

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