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US 7,740,064 B2Granted
System, method, and apparatus for downhole submersible pump having fiber optic communications
AssigneeBaker Hughes Incorporated
InventorsRobert McCoy, Gordon Besser, Alan Reynolds
Life of this patent
Estimating the term…
Abstract
A downhole submersible pump system, method, and apparatus utilizes fiber optic sensors and distributed temperature sensors below the submersible pump to monitor pump discharge pressure and temperature, intake pressure and temperature, and motor temperature. In addition, distributed temperature sensors are used below the pump to monitor the perforations within the well bore.
Claims15
A submersible pump system for monitoring parameters in a well, comprising:
- an electrical submersible pump (ESP) having a motor;
- a fiber optic system including a surface panel at a surface of the well having a laser light source, a fiber optic cable extending from the surface panel to the ESP;
- a fiber optic sensor mounting sub mounted to a lower end of the motor, the mounting sub having an interior portion in fluid communication with motor oil contained in the motor;
- and
- at least one fiber optic sensor mounted in the mounting sub, connected to the fiber optic cable for receiving light from the surface panel, and immersed within the motor oil for sensing a parameter of the motor oil.
2 more elements
A submersible pump system for monitoring parameters in a well, comprising:
- an electrical submersible pump (ESP) having a motor;
- a fiber optic system including a surface panel at a surface of the well having a laser light source, and an upper fiber optic cable extending from the surface panel to the ESP;
- a fiber optic sensor mounting sub mounted to a lower end of the motor;
- at least one motor fiber optic sensor mounted in the mounting sub for sensing a parameter in the vicinity of the motor, the motor fiber optic sensor being connected to the upper fiber optic cable for receiving light from the surface panel;
- a string of tubing attached to a lower end of the mounting sub and extending to the vicinity of perforations in the well;
- a lower section of fiber optic cable extending from the mounting sub along the string of tubing to the vicinity of the perforations for determining a temperature gradient of the well;
- wherein the mounting sub comprises:
- an upper portion that slides within an interior portion of the motor;
- a passage within the upper portion for receiving a lower end of a drive shaft of the motor, the passage being in fluid communication with motor oil in the motor;
- and
- wherein the motor fiber optic sensor is located within the passage below the lower end of the drive shaft.
8 more elements
A submersible pump system for monitoring parameters in a well, comprising:
- an electrical submersible pump (ESP) having a motor;
- a fiber optic system including a surface panel at a surface of the well having a laser light source, and an upper fiber optic cable extending from the surface panel to the ESP;
- a fiber optic sensor mounting sub mounted to a lower end of the motor;
- at least one motor fiber optic sensor mounted in the mounting sub for sensing a parameter in the vicinity of the motor, the motor fiber optic sensor being connected to the upper fiber optic cable for receiving light from the surface panel;
- a string of tubing attached to a lower end of the mounting sub and extending to the vicinity of perforations in the well;
- a lower section of fiber optic cable extending from the mounting sub along the string of tubing to the vicinity of the perforations for determining a temperature gradient of the well;
- wherein the mounting sub comprises:
- an upper chamber in fluid communication with motor oil in the motor;
- the motor fiber optic sensor being located within the upper chamber
- a lower chamber separated from the upper chamber by a sealed barrier;
- an outer connector in an exterior wall of the lower chamber through which the upper fiber optic cable enters into the lower chamber;
- and
- wherein the motor fiber optic sensor is mounted to the sealed barrier.
10 more elements
Dependencies are inferred from the claim text.