Electro-hydraulic surface controlled subsurface safety valve actuator
AssigneeBaker Hughes Incorporated
InventorsMichael S. Rawson, Charles M. Tompkins, Doug Trott
Life of this patent
Estimating the term…
Abstract
An electro-hydraulic surface controlled subsurface safety valve is controllable entirely electrically. The actuator operates on an electrically actuated pressure pump and a supply of hydraulic fluid reservoired in the tool proximate to the safety valve. A dump valve is normally open so that if power fails, pressure is released and the safety valve closes.
Claims21
An actuation system for a downhole tool comprising:
- a downhole actuation fluid reservoir;
- a fluid pump in communication with said reservoir and in communication with said tool;
- a motor connected to said fluid pump;
- a draw sensor connected to said motor for automatic shut-off of said motor;
- and
- a dump valve having access to pressurized fluid moving between said pump and said tool.
An actuation system for a downhole tool comprising:
- a downhole actuation fluid reservoir;
- a solenoid operating positive displacement plunger pump in communication with said reservoir and in communication with said tool;
- and
- a dump valve having access to pressurized fluid moving between said pump and said tool.
An actuation system for a downhole tool comprising:
- a downhole actuation fluid reservoir;
- a fluid pump in communication with said reservoir and in communication with said tool;
- and
- a normally open solenoid operating piloting valve having access to pressurized fluid moving between said pump and said tool.
An actuation system for a downhole tool comprising:
- a downhole actuation fluid reservoir;
- a fluid pump in communication with said reservoir and in communication with said tool;
- a dump valve having access to pressurized fluid moving between said pump and said tool;
- a downhole controller to control operation of said pump and said dump valve wherein said controller powers said dump valve to close said dump valve and powers said motor to pump fluid from said reservoir to said downhole tool.
An actuation system for a downhole tool comprising:
- a downhole actuation fluid reservoir;
- a fluid pump in communication with said reservoir and in communication with said tool;
- and
- a dump valve having access to pressurized fluid moving between said pump and said tool said dump valve being mounted in a manifold that provides access to said pressurized fluid.
An actuation system for a surface controlled subsurface safety valve comprising:
- a housing attachable to a subsurface safety valve, said housing containing:
- a hydraulic fluid reservoir;
- a fluid pressurizer in fluid communication with said reservoir;
- a manifold providing a fluid conduit between said fluid pressurizer and said safety valve and a fluid channel intersecting said fluid conduit;
- a dump valve connected to said fluid channel in said manifold;
- an electronics package mounted within said housing and electronically connected to said fluid pressurizer and said dump valve.
Dependencies are inferred from the claim text.