Measuring and testing – Borehole or drilling – Fluid flow measuring or fluid analysis
Patent
1997-05-02
1999-01-26
Brock, Michael
Measuring and testing
Borehole or drilling
Fluid flow measuring or fluid analysis
7315219, 16625001, 1661176, E21B 4701, E21B 4908
Patent
active
058640576
ABSTRACT:
A nipple is provided downhole as part of a tubing (drill string or production) string. The nipple has an interior passage with recesses therein and a seat. A data probe attached to a wireline traverses inside of the tubing from the surface to the nipple. The probe has a seal that seats inside of the nipple. The probe shuts in the well to allow formation fluid pressure to build. A first latch deploys into one of the recesses to retain the seal in place against the pressure. A bypass around the seal is provided. The bypass is kept closed against the pressure by a second latch that deploys into the other nipple recess. When the probe is to be retrieved to the surface, the bypass is opened to allow the pressure across the seal to equalize. The bypass is opened by unlatching the second latch. The seal is unseated by unlatching the first latch. The first and second latches are connected in series so as to operate sequentially, with the first latch deploying before the second latch. The probe has instrumentation and a sampling chamber which can be brought to the surface during flow periods of a test.
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Flow Control Systems, Baker Packers, A Division of Baker Oil Tools, Inc., pp. 598, 601, 602, 203; admitted to prior art.
Brock Michael
Mantooth Geoffrey A.
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