US 2018/0123384 A1 · POWER STORAGE AND SUPPLY METHOD AND SYSTEM FOR A DRILLING RIG

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.

Claims28

Dependent claims

A power storage and supply method for a drilling rig, the method comprising:

charging an Energy Storage System (ESS) by regenerative energy from at least one motor group, wherein the ESS is connected to a primary common DC bus, wherein at least one bi-directional DC-to-DC converter is connected between the primary common DC bus and at least one secondary DC bus, and wherein at least one DC-to-AC inverter is connected between the at least one secondary DC bus and the at least one motor group;
and
discharging power from the ESS to any motor group through the primary common DC bus, the at least one bi-directional DC-to-DC converter, the at least one secondary DC bus, and the at least one DC-to-AC inverter, wherein the any motor group is connected to the at least one DC-to-AC inverter.

A power storage and supply system for a drilling rig, the system comprising:

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 at least one secondary DC bus;
at least one DC-to-AC inventor connected between the at least one secondary DC bus and at least one motor group;
and
an Energy Storage System (ESS) connected to the primary common DC bus and configured to be charged by regenerative energy from at least one motor group through the at least one DC-to-AC inverter, the at least one secondary DC bus, the at least one bi-directional DC-to-DC converter, and the primary common DC bus, wherein the ESS is further configured to discharge power to any motor group through the primary common DC bus, the at least one bi-directional DC-to-DC converter, the at least one secondary DC bus, and the at least one DC-to-AC inverter, wherein the any motor group is connected to the at least one DC-to-AC inverter.

3 more elements

Dependencies are inferred from the claim text.

Power storage and supply method and system for a drilling rig

Life of this patent

Power storage and supply method and system for a drilling rig

Life of this patent

Abstract

Claims28