Patent ID: 9347280
Filing Date: 2016-05-24
CPC Classification: E21B

Claim Text:
1. A running tool configured to manipulate an adjustable riser suspension system to suspend a riser under tension, comprising: a work string configured to detachably couple to the riser; a piston affixed to the work string; an expansion cylinder disposed about the piston, wherein the expansion cylinder is configured to communicate with a riser hanger coupled to a mating sleeve; an annular element affixed to the work string, wherein the annular element comprises a hydraulic conduit; hydraulic sleeves disposed about the upper and lower portions of the annular element that define hydraulic chambers, wherein the hydraulic chambers are coupled by the hydraulic conduit and wherein each of the hydraulic sleeves further comprises a guide pin on its exterior surface; and a rotating sleeve disposed about the annular element and having a helical groove on its interior surface, wherein the helical groove is engaged by the guide pins on the exterior surfaces of the hydraulic sleeves such that axial expansion of the hydraulic sleeves rotates the rotating sleeve.