Table of Contents
What is a semi-submersible production platform?
A semi-submersible platform is a specialised marine vessel used in offshore roles including as offshore drilling rigs, safety vessels, oil production platforms, and heavy lift cranes. They have good ship stability and seakeeping, better than drillships.
What is the meaning of semi-submersible?
Definition of semisubmersible : being a floating deepwater drilling platform that is towed to a desired location and then partially flooded for stabilization and usually anchored.
How does a semi-submersible work?
Semi-submersibles are the choice for drilling from a floating position, due to the deep water depths. Semi-submersible (“semi”) rigs float like a ship while being towed into position, where their pontoons can then be flooded, partially submerging the rig. Figure 5-4 illustrates a typical semi-submersible.
What is a semi-submersible barge?
How semi-submersible barges operate. These specialised barges are equipped with pumping towers. This allows the barge to submerge down below the surface and for the cargo to be floated onto the deck, before the barge is de-ballasted and raised, with the cargo, above the water once again.
How many semi-submersible rigs are there?
Today, there are over 300 floating production platforms in operation, the majority of which are semisubmersible Floating Production Systems (FPS) and Floating Production Storage and Offloading Platforms (FPSOs).
How is a semi submersible rig kept above the hole at a drill site?
Mooring lines anchor the rig above the well, and dynamic positioning can help to keep the semisub on location, as well. Semisubmersibles and other mobile offshore facilities are moored in systematic ways, but there are many different designs for various situations.
How many drillships are there in the world?
Currently, there are 129 drillships in the world.
How are oil platforms secure?
They are generally anchored by combinations of chain, wire rope or polyester rope, or both, during drilling and/or production operations, though they can also be kept in place by the use of dynamic positioning.
What is submersible pump motor?
A submersible pump, also called an electric submersible pump, is a pump that can be fully submerged in water. The motor is hermetically sealed and close-coupled to the body of the pump. A submersible pump pushes water to the surface by converting rotary energy into kinetic energy into pressure energy.