Measuring and testing – Borehole or drilling – Downhole test
Patent
1993-01-19
1994-08-16
Williams, Hezron E.
Measuring and testing
Borehole or drilling
Downhole test
73 38, 166250, E21B 4700, G01N 1508
Patent
active
053376013
ABSTRACT:
A system and method are disclosed for measuring pressure in a sealed well using a differential transducer. A differential transducer is employed in a number of applications to measure either the pressure in the upper portion of a well or the level of liquid contained in the well. In each application, the back side of the differential transducer is vented to the same pressure as is present in the upper portion of the well. In one embodiment, the present invention is used to determine information relating to the liquid level in a well during a soil vapor extraction procedure. The information is then used to control a pump which maintains a desired liquid level in the well. In another embodiment, the present invention is used to determine information relating to the liquid level in a well during a pneumatic slug test. The information is then used to determine how quickly the well can recover from changes in pressure. In an alternate embodiment, the present invention is used to measure the effects of a vacuum applied to one well on another well located some distance away. The measured effect is then used to calculate the permeability of the soil between the wells.
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Becker William L.
Kuestner William J.
Dombroske George
In-Situ, Inc.
Williams Hezron E.
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