.... The restrictions regarding collapse performance under compression are discussed. loading equivalent grade accounting diameter extrado fiber calculate pipe collapse performance equation upstream oil & gas equivalent grade torsion equivalent stress internal pressure axial stress outer wall...

.... The conclusions of this paper include recommendations for VIT design and performance verification. Following these recommendations should result in higher reliability and more cost effective wells in completion programs utilizing VIT for deepwater applications. equivalent stress vit candidate product...

... of the operation. P. 901^ drillstring design case 3 case 1 case 2 vibration damage excitation factor prevention application mwd tool displacement whirl upstream oil & gas frequency critical speed dynamic analysis equivalent stress drilling operation successful application rpm...