American Petroleum Institute

Bulletin on Comparison of Marine Drilling Riser Analyses - First Edition
 N BULL 2J

Annotation

General

The physical layout of the cases described here is assumed to be two-dimensional-in a vertical plane with all forces and elements lying within the plane Figures 1 and 2 are a typical riser configuration and a cross section of the riser respectively These figures identify major components and define various measurements.

The sixteen-inch riser is assumed to contain mud only-with no drill pipe or other internal connections The riser is attached at its lower end to a pin connection referred to as a lower ball joint At its top, it is restrained by another pin connection, the support ring Both joints are frictionless, and for simplicity, the slip joint is assumed to have the same physical properties as the rest of the riser The riser has no upper, or intermediate, ball joint.

Furthermore it is assumed that all cases are for a semi-submersible drilling vessel with the upper end of the riser exposed to wave forces Wave and current forces are assumed to act in the same direction-this direction is defined as the direction of the positive offset Choke and kill lines are "broadside" to waves and current, as shown in Figure 2, and assumed to contribute no stiffness to the rise.

Автоматический перевод:

Бюллетень по сравнению морских исследований переходной платы развертки - первый выпуск

Общий

Физическое расположение случаев, описанных здесь, как предполагается, является "двумерным в" вертикальной плоскости со всеми силами, и элементы, лежащие в плоских фигурах 1 и 2, являются типичной конфигурацией переходной платы и поперечным сечением переходной платы соответственно, Эти числа идентифицируют главные компоненты и определяют различные измерения.