What is a flex riser used for?
Flexible risers are an important component of offshore production systems of oil and gas. They are used to link subsea pipelines to floating installations, such as FPSOs (floating production/storage/off-loading unit).
What are the types of riser?
Types of riser
- Dry riser: Used to supply water within buildings for fire-fighting purposes.
- Wet riser: Used to supply water within buildings for fire-fighting purposes.
- Stairs riser: The vertical face between the back of the tread of one stair and the front of the tread of the stair above.
What is a riser in pipeline?
Riser is defined as the vertical or near-vertical segment of pipe connecting the facilities above water to the subsea pipeline. The riser portion extends (as a minimum) from the first above-water valve or isolation flange to a point five pipe diameters beyond the bottom elbow, based on codes.
What is a flexible dynamic riser is made of?
Flexible risers and flowlines are complex structures comprised of multiple layers, combining steel armor wires for strength and polymer layers for low relative bending to axial stiffness.
What is the main role of riser?
A riser, also known as a feeder, is a reservoir built into a metal casting mold to prevent cavities due to shrinkage. Risers prevent this by providing molten metal to the casting as it solidifies, so that the cavity forms in the riser and not the casting.
What does a riser do?
A riser, also known as a feeder, is a reservoir built into a metal casting mold to prevent cavities due to shrinkage. Most metals are less dense as a liquid than as a solid so castings shrink upon cooling, which can leave a void at the last point to solidify.
How do risers work?
Similar to pipelines or flowlines, risers transport produced hydrocarbons, as well as production materials, such as injection fluids, control fluids and gas lift. Usually insulated to withstand seafloor temperatures, risers can be either rigid or flexible.
What is flexible pipe?
A flexible pipe is a configurable product made up of several layers. The main components are leakproof thermoplastic barriers and corrosion-resistant steel wires. Flexibility makes it possible to spool the pipe on a reel or in a carousel for efficient and quick transportation and installation.
What kind of risers are used in production?
Flexible risers form an S shape ( lazy S, steep S, lazy wave, or steep wave risers) are also used to connect the free-standing fixed risers to the production platform. Helical strakes can be installed to reduce riser motion and to prevent risers from contact with each other.
How are flexible risers used on floating platforms?
SCRs are used on floating production platforms that experience more heave motion and use subsea trees (wet trees) that are located on the seafloor. Flexible risers are used when wells are distributed over a large distance on the seafloor.
How are flexible risers used in oil rigs?
Flexible risers are used when wells are distributed over a large distance on the seafloor. The crude oil and natural gas from the wells are processed onboard the FPSOs with the production equipment on the main deck.
How did the Z riser get its name?
The Z Riser was originally developed in the Land of Light to help Ultra Warriors deal with berserk monsters throughout space, due to the emergence of the Devil Splinters. Ultraman Hikari, who was developing this device, required a “neutral” test subject and thus Ultraman Zero referred Z to him, who eventually got the device named after him.