Patents by Inventor Rajinee KUNA

Rajinee KUNA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Power storage and supply method and system for a drilling rig
    Patent number: 10797510
    Abstract: The invention provides a power storage and supply method and system for a drilling rig. The system comprises a primary common direct current (DC) bus, at least one secondary DC bus, at least one bi-directional DC-to-DC converter connected between the primary common DC bus and the secondary DC bus, at least one motor group each connected to the secondary DC bus through a DC-to-AC inverter, and an Energy Storage System (ESS) configured to be charged by regenerative energy from at least one motor group and discharge power to at least one motor group through the primary common DC bus and the bi-directional DC-to-DC converter. The system may further comprise a bi-directional AC-to-DC converter between the primary DC bus and an AC bus, wherein the ESS is further configured to be charged by regenerative energy generated during lowering operation of a jacking system for the drilling rig, wherein the jacking system is connected to the AC bus.
    Type: Grant
    Filed: October 30, 2017
    Date of Patent: October 6, 2020
    Assignees: Keppel Offshore & Marine Technology Centre Pte Ltd, Keppel FELS Limited
    Inventors: Kok Seng Foo, Wey Lii Lee, Rajinee Kuna, Bernard Voon Ee How, Shaikh Afshar Hussain
  • POWER STORAGE AND SUPPLY METHOD AND SYSTEM FOR A DRILLING RIG
    Publication number: 20180123384
    Abstract: The invention provides a power storage and supply method and system for a drilling rig. The system comprises a primary common direct current (DC) bus, at least one secondary DC bus, at least one bi-directional DC-to-DC converter connected between the primary common DC bus and the secondary DC bus, at least one motor group each connected to the secondary DC bus through a DC-to-AC inverter, and an Energy Storage System (ESS) configured to be charged by regenerative energy from at least one motor group and discharge power to at least one motor group through the primary common DC bus and the bi-directional DC-to-DC converter. The system may further comprise a bi-directional AC-to-DC converter between the primary DC bus and an AC bus, wherein the ESS is further configured to be charged by regenerative energy generated during lowering operation of a jacking system for the drilling rig, wherein the jacking system is connected to the AC bus.
    Type: Application
    Filed: October 30, 2017
    Publication date: May 3, 2018
    Inventors: Kok Seng FOO, Wey Lii LEE, Rajinee KUNA, Bernard Voon Ee HOW, Shaikh Afshar HUSSAIN