Measuring and testing – Borehole or drilling – Downhole test
Patent
1994-04-29
1996-05-21
Brock, Michael J.
Measuring and testing
Borehole or drilling
Downhole test
73155, 73784, E21B 4900, E21B 4910
Patent
active
055178545
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 straddle-packer assembly. A cased-hole sonde configuration has a gunblock assembly, a gunblock orienting module hydraulics for formation pretest 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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Evans et al., "Appalachian Stress Study, 1. A Detailed Description of In Situ Variations in Devonian Shales of the Appalachian Plateau", Journal of Geophysical Research, vol. 94, No. B6, pp. 7129-7154, Jun. 1989.
Dave Yogesh S.
Plumb Richard A.
Brock Michael J.
Hyden Martin D.
Pojunas Leonard W.
Riter Bruce D.
Schlumberger Technology Corporation
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