# US 10,246,972 B2 · In-riser power generation

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- Number: US 10,246,972 B2
- Document ID: US10246972B2
- Status: Granted
- Kind: B2
- Application number: 15/225,497
- Filed: 2016-08-01
- Published: 2016-11-24
- Granted: 2019-04-02
- Earliest claimed: 2011-12-16
- Assignees: Schlumberger Technology Corporation
- Applicants: Schlumberger Technology Corporation
- Inventors: Kirk W. Flight; Matthew Niemeyer; Ronald James Spencer; John Yarnold; Jeffrey Marabella; Gary Rytlewski
- Web page: https://patentgrep.com/patent/US10246972B2

## CPC

- E21B 41/0085: {Adaptations of electric power generating means for use in boreholes}
- E21B 4/02: Fluid rotary type drives
- E21B 17/01: Risers
- E21B 33/0355: {Control systems, e.g. hydraulic, pneumatic, electric, acoustic, for submerged well heads}
- E21B 33/063: {for shearing drill pipes (cutting of wireline E21B29/04)}
- E21B 33/064: specially adapted for underwater well heads
- F03B 3/04: with substantially axial flow throughout rotors, e.g. propeller turbines {(rotors per se F03B3/126)}
- F03B 3/126: {Rotors for essentially axial flow, e.g. for propeller turbines (with adjustable blades F03B3/14)}
- F03B 3/18: Stator blades; Guide conduits or vanes, e.g. adjustable {(conduits in dams or the like F03B13/08; arrangement of valves F03B11/004)}
- E21B 34/04: in underwater well heads
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- F03B: MACHINES OR ENGINES FOR LIQUIDS (positive-displacement engines for liquid F03C; machines for liquids and gases F01; positive-displacement machines for liquids F04, rotary fluid gearing of the hydrokinetic type F16H41/00)

## Abstract

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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

The method of claim 1 further comprising directing the generated power to a subsea hydraulic control unit.

### Claim 3 (depends on 2)

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.

### Claim 4 (depends on 1)

The method of claim 1 wherein fluid is directed into the sealed annular region by a blowout preventer access line.

### Claim 5 (depends on 4)

The method of claim 4 wherein the blowout preventer access line is a kill line.

### Claim 6 (depends on 1)

The method of claim 1 wherein the at least one turbine power generator comprises an impeller.