초록 ▼

A device for sampling fluid from an earth formation is disclosed. The device includes: an inlet port disposable in fluid communication with the fluid in a borehole; an injector including an injection chamber in fluid communication with the inlet port, the injector configured to receive a portion of

A device for sampling fluid from an earth formation is disclosed. The device includes: an inlet port disposable in fluid communication with the fluid in a borehole; an injector including an injection chamber in fluid communication with the inlet port, the injector configured to receive a portion of the fluid and direct the fluid toward an analysis unit for analyzing constituent materials in the fluid; and a high pressure valve configured to admit the portion of the fluid at a borehole pressure and release the portion of the fluid into the injector, the portion having a volume that is less than or equal to about one microliter. A system and method for analyzing constituents of fluid in a borehole in an earth formation is also disclosed.

대표청구항 ▼

1. A method of analyzing constituents of fluid in a borehole in an earth formation, the method comprising: receiving the fluid via an inlet port from the borehole;actuating a valve to inject a selected portion of the fluid into an injector, the selected portion having a volume that is less than or e

1. A method of analyzing constituents of fluid in a borehole in an earth formation, the method comprising: receiving the fluid via an inlet port from the borehole;actuating a valve to inject a selected portion of the fluid into an injector, the selected portion having a volume that is less than or equal to about one microliter, the injector including an injection chamber and a nozzle in fluid communication with the inlet port, the injection chamber having a volume that is at least substantially equal to the volume of the selected portion of the fluid;advancing the selected portion through the injector; andreceiving the fluid in an analysis chamber and detecting constituent materials in the fluid via an analysis unit disposed in the analysis chamber. 2. The method of claim 1, wherein the injection chamber has a volume that is at least substantially equal to the volume of the selected portion of the fluid. 3. The method of claim 1, wherein the analysis chamber is a vacuum chamber that is at least partially evacuated of gases. 4. The method of claim 1, wherein advancing the selected portion includes atomizing the selected portion. 5. A method of analyzing constituents of fluid in a borehole in an earth formation, the method comprising: receiving the fluid via an inlet port from the borehole;actuating a valve to inject a selected portion of the fluid into an injection chamber of an injector, the injection chamber having a volume that is at least substantially equal to the volume of the selected portion of the fluid;advancing the selected portion through the injector; andreceiving the fluid in an analysis chamber and detecting constituent materials in the fluid. 6. The method of claim 5, wherein the selected portion has a volume that is less than or equal to about one microliter. 7. The method of claim 5, wherein the analysis chamber is a vacuum chamber that is at least partially evacuated of gases. 8. The method of claim 5, wherein advancing the selected portion includes atomizing the selected portion. 9. The method of claim 5, wherein the valve is configured to inject the selected portion of the fluid at a borehole pressure. 10. The method of claim 9, wherein the borehole pressure is at least 8,000 psi. 11. The method of claim 5, wherein detecting is performed via an analysis unit disposed in the analysis chamber. 12. The method of claim 5, wherein detecting is performed via an analysis unit including at least one of a mass spectrometer and a gas chromatograph. 13. The method of claim 5, wherein the valve includes an actuator selected from at least one of a piezoelectric actuator, an electromagnetic actuator and a pressure actuator. 14. The method of claim 5, wherein the valve is selected from at least one of a high pressure liquid chromatography (HPLC) valve and a needle valve. 15. The method of claim 5, wherein the injection chamber includes a one-way valve configured to prevent a flow of fluid toward the inlet port. 16. A method for analyzing constituents of fluid in a borehole in an earth formation, the system comprising: receiving the fluid via an inlet port from the borehole;actuating a valve to inject a selected portion of the fluid into an injection chamber of an injector, the selected portion having a volume that is less than or equal to about one microliter, the injection chamber having a volume that is at least substantially equal to the volume of the selected portion of the fluid,advancing the selected portion from the injection chamber to a vacuum chamber, the vacuum chamber being at least partially evacuated of gases; anddetecting constituent materials in the fluid. 17. The method of claim 16, wherein detecting is performed via an analysis unit disposed in the vacuum chamber. 18. The method of claim 16, wherein the valve is configured to withstand a pressure of at least 10,000 psi. 19. The method of claim 16, wherein the injection chamber has a volume that is at least substantially equal to the volume of the selected portion of the fluid. 20. The method of claim 16, wherein the injection chamber includes a one-way valve configured to prevent a flow of fluid toward the inlet port.