Apparatus for testing oil wells

Details Apparatus for testing oil wells Apparatus for testing oil wells

1974-02-19

1976-06-22

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

166224A, E21B 4700

Patent

active

039643050

ABSTRACT:
An annulus pressure operated oil well testing and sampling apparatus utilizes hydrostatic pressue to supplement spring means which biases against valve means to hold the valve means closed until application of sufficient hydraulic pressure to the annular fluid opens the tool to the formation and allows testing operations to be performed. A subsequent intentional or inadvertent release or sudden extreme increase of applied pressure on the annular fluid actuates means to close the valve means against further formation fluid flow.

REFERENCES:
patent: 3664415 (1972-05-01), Wray et al.
patent: 3796261 (1974-03-01), Nutter
patent: 3824850 (1974-07-01), Nutter
patent: 3860066 (1975-01-01), Pearce et al.

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