What is a lower marine riser package?
The Lower Marine Riser Package (LMRP) is a mechanical device to protect an oil well located underwater (subsea) and is used during an oil well intervention.
What is marine riser?
2.1A marine riser system is used to provide a return fluid flow path from the wellbore to either a floating drilling vessel (semi submersible or hull type) or a bottom supported unit, and to guide the drill string and tools to the wellhead on the ocean floor.
What is riser in offshore platform?
A drilling riser is a conduit that provides a temporary extension of a subsea oil well to a surface drilling facility.
What is a riser in FPSO?
Flexible risers in various configurations are currently the most widely used concept with turret moored FPSO in water depth up to 1500m. This can be accounted to their flexibility which allows them to accommodate large vessel offsets and also to be spooled on reels/carrousels for storage and installation purposes.
What is an LRP system?
The Lower Riser Package is a mechanical device to protect an oil well located underwater (subsea) and used during an oil well intervention. The LRP is essentially a mini blow out preventer (BOP).
What are the types of riser?
There are essentially two kinds of risers, namely rigid risers and flexible risers. A hybrid riser is the combination of these two.
How do risers work?
The risers are located inside the tower, spanning the distance from the seafloor to the top of the tower and the buoyancy tanks. The buoyancy of the tanks keeps the risers tensioned in place. Flexible risers are then connected to the vertical risers and ultimately to the facility above.
What is riser installation?
The riser is to be pre-fabricated at an onshore fabrication yard. The internal lining on straight riser pipe is installed and the whole riser assembly attached with pre-prepared bend is hydrotested. Prior to that, the riser bend is lined separately and joined with the riser pipe by. means of flanges.
What is Lmrp in bop?
The LMRP – Lower Marine Riser Package – is the upper section of a two-section subsea BOP stack consisting of the hydraulic connector, annular BOP, ball/flex joint, riser adapter, jumper hoses for the choke, kill and auxiliary lines and subsea control modules. The LMRP interfaces with the BOP stack.
What is riser Diagram?
A diagram (two-dimensional, in a vertical plane) which shows the major items of electrical equipment in a building; displays, floor by floor, the feeders and major items of equipment.
What is a riser structure?
The inlet, or riser, is a vertical conduit whose top edge acts as a weir. The upstream end of the barrel is connected to the base of the riser. It is the job of the riser to supply enough flow to maintain pipe-full flow in the barrel. The riser can be a circular pipe or a cast-in-place concrete structure.