ALEXANDRIA, Va., March 24 -- United States Patent no. 12,584,534, issued on March 24, was assigned to Grant Prideco Inc. (Houston).
"System and method for improved heave compensation" was invented by David Bengt Johan Ankargren (Uppsala, Sweden) and Peter Gu (Kristiansand S, Norway).
According to the abstract* released by the U.S. Patent & Trademark Office: "A damping system for a heave compensator for an off-shore oil rig includes a hydraulic cylinder having a piston and a housing. The hydraulic cylinder is configured for accepting a hydraulic fluid. There is a flow passage for restricting the flow of the hydraulic fluid during movement of the piston in the housing. The hydraulic fluid is a magnetic fluid and the damping system includes ...