Claims
- 1. A probe device for simultaneously obtaining a plurality of representative samples from a multi-phase fluid stream flowing through a well pipe, said fluid stream having a plurality of zones of pre-determined cross-sectional area to be simultaneously sampled, comprising:
- a right cylindrical probe,
- drive rod means coupled to said probe which may be positioned within said fluid stream by said drive rod means, the maximum extension of said probe limited by said well pipe containing said fluid stream, said probe capable of being removed completely from said fluid stream,
- a plurality of sampling lines, each sampling line terminating in a port at the surface of said probe, said sampling ports in said probe lying along a diameter of said well pipe, each port being positioned in the probe so as to withdraw a sample from a pre-determined zone of said fluid stream, the area of each port proportional to the cross-sectional area of the zone of the fluid stream it samples,
- means for measuring the differences in static pressure among said sampling ports, said means including a plurality of static pressure tap lines branching off the sampling lines respectively, and further including a plurality of differential pressure transducers in fluid communication with said plurality of static pressure tap lines respectively, and
- a plurality of throttle means for regulating the pressure in each sampling line respectively responsive to the pressure in each static pressure tap line respectively until the differences in pressure among said static pressure tap lines are a predetermined value, whereby the sampling lines simultaneously withdraw a plurality of representative samples from said fluid stream.
- 2. The device of claim 1, wherein said sampling ports extend solely along a radius of said well pipe.
- 3. The device of claim 1, wherein said probe cross section parallel to said fluid stream is tear-drop shaped with the largest end facing into flow direction (22) of said fluid stream.
- 4. The device of claim 1, wherein said sampling ports have straight sides of entry into said sampling port lines.
- 5. The device of claim 1, wherein said sampling ports have convex sides of entry into said sampling port lines.
- 6. The device of claim 1, wherein said sampling ports have concave sides of entry into said sampling port lines.
- 7. The device of claim 1, wherein an individual analysis means is coupled to fluid samples from said sampling port lines for individual analysis, thereby providing a positional map of the characteristic properties of said fluid stream.
- 8. The device of claim 1 wherein said plurality of throttle means regulate the pressure in the plurality of sampling lines respectively such that the differences in pressure among said static pressure tap lines is the null value, whereby the sampling lines simultaneously withdraw a plurality of isokinetic samples from the fluid stream.
- 9. The device of claim 1 wherein said throttle means regulate the pressure in the sampling lines to enhance or retard sample withdrawal at selected sampling ports.
- 10. The device of claim 1 wherein each port is of equal area and spaced at variable distances along the probe.
- 11. The device of claim 1 wherein each port is of variable area and spaced at equal distances along the probe.
- 12. The probe device of claim 1 wherein said well pipe is provided with a recess on its inner wall, and said right cylindrical probe has a hemispherical end which may be seated in said recess of said well pipe, such that said recess limits the maximum extension of said probe into said well pipe.
Parent Case Info
This is a continuation of application Ser. No. 173,247, filed July 29, 1980 now abandoned.
CONTRACTUAL ORIGIN OF THE INVENTION
The United States Government has rights in this invention pursuant to Contract No. EG-76-C-06-1830 between the U.S. Department of Energy and Battelle Pacific Northwest Laboratories.
US Referenced Citations (13)
Foreign Referenced Citations (2)
Number |
Date |
Country |
718766 |
Feb 1942 |
DE2 |
54-39189 |
Mar 1979 |
JPX |
Non-Patent Literature Citations (2)
Entry |
Schraub, "Isokenetic Probe and Other Two Phase Sampling Devices: A Survey", 11th National ASME/AICHE Heat Conference, pp. 47-57, 1969. |
Lahey et al., "Mass Flux & Enthalpy Distribution etc.", Journal of Heat Transfer 93,197-209, May 1971. |
Continuations (1)
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Number |
Date |
Country |
Parent |
173247 |
Jul 1980 |
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