Measuring and testing – Borehole or drilling – Downhole test
Patent
1983-11-03
1985-11-19
Birmiel, Howard A.
Measuring and testing
Borehole or drilling
Downhole test
73155, 175 48, E21B 4706
Patent
active
045534284
ABSTRACT:
In accordance with an illustrative embodiment of the present invention, a drill stem testing apparatus includes a housing leaving a full-opening bore, and a main test valve for opening and closing the bore in order to flow and shut-in the formation interval being tested. The apparatus further includes a first port means for communicating the pressure of fluids in the bore below the test valve to a first pressure transducer, a second port means for communicating the pressure of fluids in the bore above the test valve to a second pressure transducer, and a third port means for communicating the pressure of fluids in the well annulus externally of the housing to a third pressure transducer. The outputs of the respective transducers are fed to a recording gauge so that a pressure record is obtained of the changes in fluid pressure that occur in the bore of the housing above and below the test valve as well as in the annulus externally of the housing.
REFERENCES:
patent: 3478584 (1969-11-01), Strubhar et al.
patent: 3981188 (1976-09-01), Barrington et al.
patent: 4426882 (1984-01-01), Skinner
Birmiel Howard A.
Schlumberger Technology Corporation
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