Multi-stage injector for fluid analysis

• US 8,250,904 B2
• Filed: 02/28/2008
• Issued: 08/28/2012
• Est. Priority Date: 12/20/2007
• Status: Active Grant

• Current Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Original Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Inventors: Shah, Jagdish, Steinecker, William H., Bostrom, Neil William, Raghuraman, Bhavani
• Primary Examiner(s): FITZGERALD, JOHN P
• Application Number:
  US12/039,437
• Publication Number:
  US 20090158815A1
• Time in Patent Office: 1,643 Days
• Field of Search: 73/23, 73/35, 73/234.1, 73/234.2
• US Class Current: 73/23.42
• CPC Class Codes: G01N 2030/202 rotary valves
• CPC Class Codes: G01N 30/20 using a sampling valve

Abstract

The present invention generally recites a method, system and apparatus for fluid analysis and more specifically recites a method system and apparatus for multistage injection of a fluid to be analyzed into a fluid analysis instrument.

Claims

1. A multi-stage injector for fluid analysis, said multi-stage injector comprising:

at least one pressure regulation stage adapted for receiving a fluid sample, wherein said at least one pressure regulation stage regulates a received fluid sample from a first pressure to a second pressure;

at least one conditioning stage in communication with said at least one pressure regulation stage, said at least one conditioning stage configured to receive said fluid sample from said pressure regulation stage, wherein the at least one conditioning stage comprises an expansion chamber; and

at least one injection stage in communication with said at least one conditioning stage, wherein said at least one injection stage is configured to provide at least a portion of said fluid sample to a fluid sample analysis instrument.

2. The multi-stage injector of claim 1, wherein one of said at least one pressure regulation stage, said at least one conditioning stage and said at least one injection stage is pressure compensated.

3. The multi-stage injector of claim 1, wherein said at least one pressure regulation stage regulates a first high pressure to a second lower pressure.

4. The multi-stage injector of claim 1, wherein said at least one pressure regulation stage regulates a first low pressure to a second high pressure.

5. The multi-stage injector of claim 1, wherein said at least one pressure regulation stage is a multi-port rotary valve.

6. The multi-stage injector of claim 1, wherein said at least one pressure regulation stage is a solenoid valve.

7. The multi-stage injector of claim 1, wherein said at least one expansion chamber provides a volume increase in the fluid sample.

8. The multi-stage injector of claim 1, further comprising a distributor.

9. The multi-stage injector of claim 1, wherein said at least one injection stage is in communication with at least one chromatographic column.

10. The multi-stage injector of claim 1, wherein said at least one injection stage is in communication with a parallel arrangement of chromatographic columns.

11. The multi-stage injector of claim 1, wherein said at least one injection stage is in communication with a chromatographic column or a GC.

12. The multi-stage injector of claim 1, wherein said at least one injection stage is in fluid communication with a second injection stage.

13. The multi-stage injector of claim 1, wherein said multi-stage injector is configured to pressure regulate and condition the fluid sample substantially simultaneously.

14. The multi-stage injector of claim 1, wherein said at least one condition stage aggregates individual components of a fluid sample in time.

15. The multi-stage injector of claim 1, wherein said at least one conditioning stage segregates individual components of a fluid sample in time.

16. The multi-stage injector of claim 1, wherein said at least one injection stage is in communication with at least one of a chromatographic column, a GC, a HPLC, a SFC, a SEC, a GPC, a LC-GC, a MS, an IMS, a DMS, or a chemical sensor.

17. The multi-stage injector of claim 1, wherein at least one of said first and second pressures is at least about 500 psi.

18. The multi-stage injector of claim 1, wherein said at least one injection stage delivers a sharp small plug to an associated fluid analysis device.

19. The injection stage of claim 18, wherein said small sharp plug is delivered to a secondary chromatographic column.

20. The multi-stage injector of claim 1, wherein said at least one pressure regulation stage further comprises a carrier phase pathway for transmission of a carrier phase.

21. The multi-stage injector of claim 20, wherein said carrier phase pathway is at a lower pressure than said first pressure.

22. The multi-stage injector of claim 20, wherein said carrier phase pathway is at a higher pressure than said first pressure.

23. The multi-stage injector of claim 1, wherein said at least one conditioning stage comprises a vaporization stage.

24. The multi-stage injector of claim 23, wherein said vaporization stage vaporizes an entire fluid sample.

25. The multi-stage injector of claim 23, wherein said vaporization stage vaporizes a portion of a fluid sample.

26. The multi-stage injector of claim 23, wherein at least a portion of said fluid sample is exhausted to waste.

27. The multi-stage injector of claim 23, wherein said vaporization stage further comprises a vaporization heater, wherein said vaporization heater is controlled in accordance with a predefined heat ramp.

28. The multi-stage injector of claim 1, wherein said at least one conditioning stage comprises a compression chamber.

29. The multi-stage injector of claim 28, wherein said compression chamber is temperature modulated.

30. The multi-stage injector of claim 28, wherein said compression chamber condenses at least a portion of the sample.

31. A multi-stage fluid injection method, comprising:

providing at least one pressure regulation stage adapted for receiving a fluid sample, wherein said at least one pressure regulation stage regulates a received fluid sample from a first pressure to a second pressure;

providing at least one conditioning stage in communication with said at least one pressure regulation stage, said at least one conditioning stage configured to receive said fluid sample from said pressure regulation stage, wherein the at least one conditioning stage comprises an expansion chamber;

providing at least one injection stage in communication with said at least one conditioning stage; and

injecting at least a portion of the fluid sample to a fluid analysis instrument.

32. The method of claim 31, further comprising the step of pressure compensating at least one of said at least one pressure regulation stage, said at least one conditioning stage and said at least one injection stage is pressure compensated.

33. The method of claim 31, wherein said at least one pressure regulation stage further comprises a carrier phase pathway for transmission of a carrier phase.

34. The method of claim 31, wherein said at least one conditioning stage comprises a compression chamber.

35. The method of claim 31, wherein said at least one injection stage is in communication with a chromatographic column or a GC.

36. The method of claim 31, further comprising the step of providing a second injection stage.

37. The method of claim 31, further comprising the step of providing pressure regulation and conditioning substantially simultaneously.

38. The method of claim 31, further comprising the step of aggregating within the at least one conditioning stage, individual components of a fluid sample in time.

39. The method of claim 31 further comprising the step of segregating within the at least one conditioning stage, individual components of a fluid sample in time.

40. The method of claim 31, wherein said at least one injection stage is in communication with at least one of a chromatographic column, a GC, a HPLC, a SFC, a SEC, a GPC, a LC-GC, a MS, an IMS, a DMS, or a chemical sensor.

41. The method of claim 31, wherein at least one of said first and second pressures is at least about 500 psi.

42. The method of claim 31, wherein said at least one conditioning stage comprises a vaporization stage capable of vaporizing at least a portion of a fluid sample.

43. The method of claim 42, further comprising the step of providing a vaporization heater, wherein said vaporization heater is controlled in accordance with a predefined heat ramp.

44. A multi-stage injector for fluid analysis, said multi-stage injector comprising:

at least one pressure regulation stage adapted for receiving a fluid sample, wherein said at least one pressure regulation stage regulates a received fluid sample from a first pressure to a second pressure;

at least one conditioning stage in communication with said at least one pressure regulation stage, said at least one conditioning stage configured to receive said fluid sample from said pressure regulation stage; and

at least one injection stage in communication with said at least one conditioning stage, wherein said at least one injection stage is configured to provide at least a portion of said fluid sample to a fluid sample analysis instrument;

wherein said multi-stage injector is configured to pressure regulate and condition the fluid sample substantially simultaneously.

45. The multi-stage injector of claim 44, wherein said at least one pressure regulation stage is a multi-port rotary valve.

46. multi-stage injector of claim 44, wherein said at least one conditioning stage comprises an expansion chamber.

47. The multi-stage injector of claim 44, wherein said at least one conditioning stage comprises a vaporization stage.