E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
73/131
E21B 49/08 (2006.01) E21B 34/10 (2006.01) E21B 47/06 (2006.01) E21B 49/00 (2006.01)
Patent
CA 1229242
ABSTRACT OF THE DISCLOSURE 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 communi- cating 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 trans- ducers 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.
466930
Schlumberger Technology Corporation
Smart & Biggar
LandOfFree
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