Ultrasonic flowmeter having pressure balancing system for high pressure operation

1. A system, comprising:

a flow meter, comprising:

a first flow sensor disposed about a fluid flow path; and

a pressure balancing system configured to pressure balance the first flow sensor relative to a fluid flow along the fluid flow path.

2. The system of claim 1 , wherein the pressure balancing system is configured to pressure balance the first flow sensor relative to the fluid flow up to a pressure of approximately 5,000 psi.

3. The system of claim 1 , wherein the pressure balancing system is configured to pressure balance the first flow sensor relative to the fluid flow up to a pressure of approximately 10,000 psi.

4. The system of claim 1 , wherein the pressure balancing system comprises a piston-cylinder assembly disposed along a fluid passage between the first flow sensor and the fluid flow path.

5. The system of claim 1 , wherein the pressure balancing system comprises a bellows disposed along a fluid passage between the first flow sensor and the fluid flow path.

6. The system of claim 1 , wherein the pressure balancing system comprises a fluid chamber, the first flow sensor is disposed in the fluid chamber, and the pressure balancing system is configured to pressure balance the fluid chamber with the fluid flow path.

7. The system of claim 6 , wherein the pressure balancing system is configured to enable fluid communication between the fluid chamber and the fluid flow path.

8. The system of claim 6 , wherein the pressure balancing system is configured to block fluid communication between the fluid chamber and the fluid flow path.

9. The system of claim 6 , wherein the flow meter comprises:

a conduit disposed about the fluid flow path; and

a housing disposed about the conduit to define the fluid chamber about the conduit, wherein the first flow sensor is coupled to the conduit in the fluid chamber, and the pressure balancing system is configured to pressure balance the fluid chamber with the fluid flow path to reduce stress on the conduit.

10. The system of claim 6 , comprising a second flow sensor disposed in the fluid chamber, wherein the first and second flow sensors are configured to communicate between one another.

11. The system of claim 1 , comprising a mineral extraction system having the flow meter.

12. The system of claim 11 , wherein the mineral extraction system comprises a chemical-injection management system having the flow meter.

13. The system of claim 1 , comprising an underwater system having the flow meter.

14. A system, comprising:

an underwater apparatus; and

a meter coupled to the underwater apparatus, wherein the meter comprises:

a conduit;

a housing disposed about the conduit to define a pressurized fluid chamber about the conduit; and

a first sensor disposed in the pressurized fluid chamber.

15. The system of claim 14 , wherein the pressurized fluid chamber is configured to at least substantially balance fluid pressure internal and external to the conduit via the pressurized fluid chamber.

16. The system of claim 14 , comprising a passage extending between the pressurized fluid chamber and the conduit, wherein the passage is configured to enable fluid communication between the pressurized fluid chamber and the conduit.

17. The system of claim 14 , comprising a pressure balancer disposed along a passage between the pressurized fluid chamber and the conduit, wherein the pressure balancer is configured to block fluid communication between the pressurized fluid chamber and the conduit, and the pressure balancer is configured to balance fluid pressure internal and external to the conduit by moving an element in response to a pressure differential between the pressurized fluid chamber and the conduit.

18. The system of claim 14 , comprising a second sensor disposed in the pressurized fluid chamber, wherein the first and second sensors are configured to communicate between one another.

19. A system, comprising:

a meter, comprising:

a conduit disposed about a fluid flow path;

a first sensor coupled to the conduit, wherein the first sensor is configured to sense a first parameter of a fluid flow along the fluid flow path; and

a fluid chamber disposed about the conduit, wherein the fluid chamber is configured to at least substantially balance fluid pressure internal and external to the conduit.

20. The system of claim 19 , wherein the meter comprises a second sensor coupled to the conduit.

21. The system of claim 1 , wherein the first flow sensor extends completely around an outer circumference of the fluid flow path.

22. The system of claim 21 , wherein the flow meter comprises a second flow sensor that extends completely around the outer circumference of the fluid flow path, wherein the first and second flow sensors are axially offset from one another along the fluid flow path.

23. The system of claim 22 , wherein the first and second flow sensors are coupled to a conduit along a straight section of the conduit.

24. The system of claim 14 , wherein the first sensor extends completely around an outer circumference of the conduit.

25. The system of claim 24 , wherein the meter comprises a second sensor that extends completely around the outer circumference of the conduit, wherein the first and second sensors are axially offset from one another along the conduit.

26. The system of claim 25 , wherein the first and second sensors are coupled to the conduit along a straight section of the conduit.

27. The system of claim 19 , wherein the first sensor extends completely around an outer circumference of the conduit.

28. The system of claim 27 , wherein the meter comprises a second sensor that extends completely around the outer circumference of the conduit, wherein the first and second sensors are axially offset from one another along the conduit.