Apparatus for testing earth formations

Details Apparatus for testing earth formations Apparatus for testing earth formations

1982-07-15

1984-03-06

Birmiel, Howard A.

Measuring and testing

Borehole or drilling

Downhole test

73155, 166100, E21B 4910

Patent

active

044346530

ABSTRACT:
Apparatus is provided for collecting a plurality of samples of fluids in earth formations traversed by a well bore. The sampling apparatus includes an elongated body member adapted to carry an extensible and retractible fluid admitting probe which is selectively placed in sealing engagement with potentially producible earth formations. The fluid admitting probe is coupled to a fluid passage which is selectively placed into fluid communication with a fluid sample collection chamber. A pressure control assembly located in the fluid passage intermediate the fluid admitting probe and the sample collection chamber maintains the pressure within at least a portion the fluid passage of a predetermined proportional minimum level of formation pressure during fluid sample collection.

REFERENCES:
patent: 3011554 (1961-12-01), Desbrandes et al.
patent: 3022826 (1962-02-01), Kisling
patent: 3104712 (1963-09-01), Whitten
patent: 3653436 (1972-04-01), Anderson et al.
patent: 3780575 (1973-12-01), Urbanosky

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