In-riser power generation
In-riser power generation devices and methods are utilized to generate power subsea to operate subsea devices of a subsea well system. A turbine power generator is located in fluid communication with a subsea fluid flow path of a subsea well system and the turbine power generator is operationally connected to a subsea power device.
1. A method of generating power in a subsea well system, comprising:
closing at least a pair of rams of a blowout preventer stack to form a sealed annular region between the pair of rams;
positioning at least one turbine power generator above the sealed annular region;
connecting the sealed annular region to the at least one turbine power generator by a conduit across the closed pair of rams;
directing fluid into the sealed annular region and across the at least one turbine power generator; and
generating power in response to the fluid flow across the turbine power generator.
2. The method of claim 1 further comprising directing the generated power to a subsea hydraulic control unit.
3. The method of claim 2 wherein the fluid acts upon a first turbine power generator during fluid communication from the conduit past the first turbine power generator.
4. The method of claim 1 wherein fluid is directed into the sealed annular region by a blowout preventer access line.
5. The method of claim 4 wherein the blowout preventer access line is a kill line.
6. The method of claim 1 wherein the at least one turbine power generator comprises an impeller.