Dynamic Positioning system for offshore vessels.
The winds and waves of the ocean can cause damage in the offshore oil and gas operations. No matter whether drillship conducted drilling operations or FPSO serves as a site for production development, offshore vessels should be stable despite changes in wind, waves and currents.
While offshore drilling in shallow water Jack-up allow to position the bottom right above the place in deep water drilling rig required to be able Semisub or drillship, to swim over the place. Given that some drilling equipment should extend thousands of feet of water before even reach the ocean floor, smooth moves over the surface of the water can have a drastic impact on drilling operations.
Furthermore, some studies require offshore floating structures. Immersible FPSO and production equipment are located above the underwater developments, housing equipment and other machinery. Many risers connected with underwater development facilities above. If the wind and waves pushed off the track facilities, development will have to halt production and perform extensive repairs.
Maintaining equipment in floating position, whether in drilling or production operations, logistics is an important aspect of general procedures. During drilling, production risers are somewhat flexible to minimize movement caused by ocean currents.According to the environment and the shape of the ship, there are countless ways to anchor the ship, including strategic anchoring through various positions to the ocean floor. More recently, dynamic positioning provides a more stable way to ensure that the ship is in the correct position.
Dynamic positioning requires a number of ship thrusters or powered propellersaround boat. These thrusters are located on the front and rear and on both sides of the ship to maintain its position from all directions. Computerized system automatically thrusters driven by computing power to impose thrusters in three degrees (surge, sway and yaw), in the horizontal plane. Information about the position of the vessel is made of special sensors on the ocean floor. Furthermore, satellite links and information on weather and wind are transmitted to the computer system, which further helps to control the movement of the vessel. Using the information before it, the computer automatically adjusts the thrusters to overcome any changes in the location of the ship, provided the movement to be with the lowest possible fuel consumption and wear.
DP system is designed to respond adequately and in a failure of the driving systems of the vessel.
The main elements of the dynamic positioning system are three:
Power Control Reference.
For power in mind, the generation of the propulsion system of the ship power distribution and how the quantity of consumption by the drive system of the total.
Control is thecontrol system of the situation and the way it is done, automatically or manually.
Links are sensors provide additional information to the environment.
Console management system is in place by which the operator can monitor the environmental situation around the ship, while the latter is not installed numerous surveillance cameras.