Measuring and testing – Borehole or drilling – Downhole test
Patent
1992-06-09
1994-10-11
Warden, Robert J.
Measuring and testing
Borehole or drilling
Downhole test
166101, 166250, 166264, 166308, E21B 4700
Patent
active
053536371
ABSTRACT:
A modular sonde may be configured in various ways for measurements in open or cased boreholes. The sonde is conveyed on an electric wireline with or without a coiled tubing for conveying hydraulic energy from the surface. Modules common to the configurations include telemetry electronics, orientation, hydraulic energy accumulator, fluid chambers, hydraulic power, pumpout, and flow control. Each configuration has a stress/rheology module suited to the borehole situation. An open-hole sonde configuration has a stress/rheology module with an instrumented, inflatable packer module, an orienting module, and a probe module. A second open-hole sonde configuration has a stress/rheology module with an instrumented straddlepacker assembly. A cased-hole sonde configuration has a gunblock assembly, a gunblock orienting module hydraulics for formation pre-test and hydraulics for stressing the formation to obtain data related to formation stress characteristics. A second cased-hole sonde configuration has a straddle-packer assembly, a casing perforation device in the straddle interval, and hydraulics for stressing the formation to obtain data related to formation stress characteristics.
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Dave Yogesh S.
Plumb Richard A.
Thornton Krisanne M.
Warden Robert J.
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