Modular system for fast and easy conversion of anchor moored semi-submersibles to dynamically positioned semis without the need for dry docking, using a diesel electric thruster system
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B63H-025/02
G05D-001/02
B60L-011/00
B63H-021/17
출원번호
UP-0243797
(2008-10-01)
등록번호
US-7806065
(2010-10-26)
발명자
/ 주소
Bekker, Joannes Raymond Mari
Little, Gene Milus
출원인 / 주소
Thrustmaster of Texas, Inc.
대리인 / 주소
Buskop Law Group, PC
인용정보
피인용 횟수 :
2인용 특허 :
16
초록
A modular removable externally mountable diesel electric thruster system using azimuthing thrusters and a dynamic positioning system for positioning floating semi-submersible vessels with a ballasted waterline and at least one submerged pontoon.
대표청구항▼
What is claimed is: 1. A modular removable externally mountable diesel electric thruster system for dynamic positioning of a floating semi-submersible vessel with a ballasted waterline comprising at least one pontoon, wherein each pontoon comprises at least one vertical column integral with a top o
What is claimed is: 1. A modular removable externally mountable diesel electric thruster system for dynamic positioning of a floating semi-submersible vessel with a ballasted waterline comprising at least one pontoon, wherein each pontoon comprises at least one vertical column integral with a top of the at least one pontoon, and wherein each vertical column supports a deck above the ballasted waterline, the system comprising: a. at least one pair of azimuthing thrusters, wherein each azimuthing thruster is removably mounted to the at least one pontoon of the floating semi-submersible vessel, wherein each azimuthing thruster generates a variable thrust and, wherein each azimuthing thruster comprises: 1. a skid removably secured to a top portion of the pontoon below the ballasted waterline; 2. an upper thruster housing removably connected to the skid, wherein the upper thruster housing contains a slewing bearing with at least one electric motor driven slewing drive, at least one electrical steering angle feedback sensor for indicating a steering angle of the azimuthing thruster, and a multi-conductor slip ring assembly; 3. a tube moveably connected to the upper thruster housing on one end and removably connected on another end to an electric pod having a nozzle; 4. an electric motor inside the electric pod with a propeller drive shaft, wherein a fixed pitch propeller is removably mounted to the propeller drive shaft; and 5. a thruster electric power cable connected to the electric motor on one end and to the multi-conductor slip ring assembly on another end; b. at least one pair of diesel electric power units removably secured to the deck, wherein each diesel electric power unit engages one of the azimuthing thrusters, and wherein each diesel electric power unit comprises: 1. a power unit housing; 2. a diesel engine within the power unit housing, 3. an electric generator driven by the diesel engine; 4. a variable frequency drive connected to the electric generator; 5. a fuel tank connected to the diesel engine; 6. a cooling system for cooling within the power unit housing; 7. a starter system for the diesel engine; 8. an exhaust system connected to the diesel engine; and 9. a control system for controlling the diesel engine, electric generator, starter system, cooling system, fuel tank, variable frequency drive and combinations thereof; c. at least one pair of electric power cables and a thruster electric control cable, wherein one end of each electric power cable and each thruster electric control cable is secured to the diesel electric power unit and another end is secured to one of each pair of azimuthing thrusters; d. a dynamic positioning system connected to the diesel electric power unit; and e. at least two position reference sensors and at least two environmental reference sensors connected to the dynamic positioning system. 2. The system of claim 1, further comprising at least one engine mount for supporting the diesel engine in the power unit housing. 3. The system of claim 1, wherein the electric generator is in communication with: a voltage regulator; a generator control system; and a main breaker. 4. The system of claim 1, wherein from about two to eight pairs of azimuthing thrusters are removably mounted to each pontoon. 5. The system of claim 1, wherein the thruster upper housing is removably mounted to a side of each pontoon. 6. The system of claim 1, wherein the thruster upper housing is movably hinge mounted in the skid, and wherein hydraulic cylinders allow for hydraulic tilt of the thruster upper housing, the tube, and the electric pod. 7. The system of claim 1, wherein the electric motor is a variable speed AC electric motor. 8. The system of claim 1, wherein the electric motor is a variable speed DC electric motor, and wherein a Silicon-controlled rectifier (SCR) controls revolutions per minute of the variable speed DC electric motor. 9. The system of claim 1, wherein the electric motor is reversible in direction of rotation. 10. The system of claim 1, wherein the skid is mounted above the ballasted waterline. 11. The system of claim 1, wherein the semi-submersible vessel is a semi-submersible drilling vessel, a semi-submersible crane vessel, a floating dry dock, an accommodation vessel, a construction support vessel, a multi-column semi-submersible vessel, a semi-submersible work-over vessel, a floatover vessel, or a space craft launching platform. 12. The system of claim 1, wherein power is supplied from gas turbine driven electric power units. 13. The system of claim 1, wherein power is supplied from the floating semi-submersible vessel.
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이 특허에 인용된 특허 (16)
Robertson Glen E. (1304 S. Orange Ave. Sarasota FL 34239) Webster John L. (Huntsville AL), Anchorless boat positioning employing global positioning system.
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Andersen, Rune B.; Blystad, Svein; Haukaas, Inge; Koenig, Gunnar; Radan, Damir; Settemsdal, Stig Olav, Fault protection system for a power system of dynamically positioned vessel.
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