Abstract: Embodiments relate generally to gimbal bearings for installation of a riser string. Gimbal bearing embodiments comprise a top ring and a bottom ring, with a plurality of high capacity laminate bearings located therebetween, the high capacity laminate bearings comprising at least one of natural rubber and a marker layer. Each high caparity laminate bearing might comprise alternating layers of steel shims and elastomeric elements bonded together via adhesive. Embodiment designs provide for improved gimbal bearing characteristics, which may improve the effective lifespan of such gimbal bearings.

Abstract: An isolator has a force input component, a force output component, a first shear unit connected between the force input component, and a second shear unit connected between the force output component, wherein the first shear unit and the second shear unit are connected in series with each other along a force path between the force input component and the force output component.