In-riser power generation

Patent metadata

Field	Value
Publication number	US-10246972-B2
Application number	US-201615225497-A
Country	US
Kind code	B2
Filing date	Aug 1, 2016
Priority date	Dec 16, 2011
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

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.

First claim

What is claimed is:

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.

Assignees

• Schlumberger Technology Corp

Inventors

• Flight Kirk W
• Niemeyer Matthew
• Spencer Ronald James
• Yarnold John
• Marabella Jeffrey
• Rytlewski Gary

Classifications

• E21B33/035

  specially adapted for underwater installations (E21B33/043, E21B33/064, E21B33/076 take precedence) · CPC title

• E21B41/0085 Primary

  Adaptations of electric power generating means for use in boreholes · CPC title

• E21B4/02

  Fluid rotary type drives · CPC title

• E21B34/04

  in underwater well heads · CPC title

• E21B17/01

  Risers · CPC title