Resources Contact Us Home
Method and apparatus for suction anchor and mooring deployment and connection

Image Number 10 for United States Patent #6457908.

A method and apparatus for deployment of mooring systems for buoyant marine structure such as mobile offshore drilling units (MODU's) and for connecting the same to the mooring lines thereof. An anchor handling vessel carries one or more anchors each having a deployment connection and a mooring connection and individually moves each anchor over its stern roller and deploys it to the sea bottom for installation. A handling line is disconnected by ROV from the deployment connection and is moved from the deployment connection to the mooring connection so as to become the main mooring line. Syntactic buoys are then mounted on the main mooring line for elevating it above the sea bottom for recovery. When MODU stationing is desired the anchor handling vessel then recovers the surface buoy and connects to the rig mooring line using a short section of mooring chain. A J-chaser stopper device is then installed in the mooring string and is connected to the mooring line of the MODU by a short section of chain. The J-chaser lowers the mooring string, completing the mooring connection between the anchor and the MODU. A plurality of mooring strings, typically eight, are deployed in this manner to properly station the MODU. Disconnection of the MODU is accomplished essentially by the reverse of the above deployment procedure.

  Recently Added Patents
Method and system for constructing a customized web analytics application
Preserving privacy of digital communication information
Shield for vacuum circuit breaker
LED lamp including heat dissipator
Process cartridge and electrophotographic image forming apparatus
Keyswitch controller
Vehicle and communication monitoring
  Randomly Featured Patents
Vehicle mirrors
Global position system device
Gas shutoff device
Foldable spectacle frame with engaging means for maintaining the spectacle frame in unfolded state while wearing
Surface pattern for a napkin providing the illusion of a three-dimensional pineapple
Asymmetrical gas turbine cooling port locations
Writing end eraser for a double acting mechanical pencil or erasable ink ball point pen
Quadrature amplitude modulation/demodulation device using multi-level digital signals
Plasma panel with cell conditioning effect
Control unit for dental instruments