Elastomeric subsea flex joint and swivel for offshore risers

Details Elastomeric subsea flex joint and swivel for offshore risers Elastomeric subsea flex joint and swivel for offshore risers

1997-08-13

1999-09-14

Arola, Dave W.

Pipe joints or couplings

With lubrication

285184, 285223, 285263, 192 553, 192110R, F16L 700

Patent

active

059510617

ABSTRACT:
An elastomeric flex joint is provided with a rotational bearing so that torsional stress is relieved by slip of the rotational bearing. In a first embodiment, the flex joint is designed to resist flexing from a mean position at which there is a substantial bend of axial direction, and the rotational bearing does not normally slip. An adjustment mechanism reduces the loading on the elastomeric flex element and the rotational bearing so that the bearing will slip during an initial orientation or during an adjustment of the joint. In a second embodiment, all small torsional deflections are absorbed by the elastomeric flex element, and large torsional deflections are absorbed by the rotational bearing. This is desirable because the elastomeric flex element has a greater fatigue capacity for small oscillations than the rotational bearing. An elastomeric clutch can be used to precisely control the break-out torque.

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