Method for borehole conductivity profiling

Details Method for borehole conductivity profiling Method for borehole conductivity profiling

2007-10-16

2007-10-16

Larkin, Daniel S. (Department: 2856)

Measuring and testing

Borehole or drilling

Fluid flow measuring or fluid analysis

C073S038000, C166S250020, C166S250030

Reexamination Certificate

active

11095081

ABSTRACT:
A method of using an everting borehole liner to perform fluid conductivity measurements in materials surrounding a pipe, tube, or conduit, such as a borehole below the surface of the Earth. A flexible liner is everted (turned inside out) into the borehole by introducing into the liner a pressurized driving fluid. As the liner displaces the ambient fluid in the borehole into the surrounding formation, the varying rate at which driving fluid is introduced into the liner is monitored and recorded. As the impermeable liner covers the flow paths in the wall of the hole, the rate at which driving fluid must be introduced slows. From the measured driving fluid introduction rate, the flow rates out discrete sections of the borehole are determined.

REFERENCES:
patent: 4064211 (1977-12-01), Wood
patent: 4385885 (1983-05-01), Wood
patent: 5520248 (1996-05-01), Sisson et al.

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