What is production riser?

The production riser is the portion of the flowline that resides between the host facility and the seabed adjacent to a host facility. Riser dimensions range from 3 to 12 in (76.2 to 304.8 mm). in diameter.

What is a riser in drilling rig?

The risers are pipes through which the drill string carries out the drilling function. A marine drilling riser system provides a tubular conduit from the drilling unit to the subsea blow out preventer (BOP) and the wellbore below it. The drilling riser is composed of a series of joints which are connected by couplings.

What is marine riser?

Marine risers are cylindrical conduits that are used to transfer crude oil from the subsea wellhead to the offshore facility. A riser is connected to a blowout preventer valve of the wellhead to prevent any leakage during the transportation of oil and gas.

What are the two interfaces for a drilling riser?

Drilling risers are categorised into two types: marine drilling risers used with subsea blowout preventer (BOP) and generally used by floating drilling vessels; and tie-back drilling risers used with a surface BOP and generally deployed from fixed platforms or very stable floating platforms like a spar or tension leg …

What is offshore riser?

These offshore riser systems are conduits (or collection of conduits) used for the safe transportation of material (primarily fluids and gases) between the seafloor and the host platform. These fluids may travel from the seabed to the platform or from the platform to the seabed.

What does Riserless drilling mean?

“Riserless drilling” does not use Riser pipe. Instead, in “Riserless drilling”, the drillpipe runs into the open water to the sea floor and into the borehole. Here, seawater is used as drilling fluid. The cuttings are not returned to Chikyu and are washed out of the borehole onto the sea floor.

What are risers in casting?

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 is riser system offshore?

What is riser analysis?

Riser analysis tools are special purpose programs for analyses of flexible risers, catenary risers, top tensioned risers and other slender structures, such as mooring lines and pipelines.

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