Sonic well tool transmitter receiver array including an attenuation and delay apparatus
Patent
·
OSTI ID:5799541
This patent describes a sonic well tool including a receiver adapted to be disposed in a borehole. It comprises sensor means for sensing the propagation of monopole compressional waves and dipole shear waves propagating in a formation traversed by the borehole and generating output signals representative of the monopole compressional waves or the dipole shear waves, the sensor means including, sensors disposed in a respective plurality of cross sections at respective locations along a longitudinal axis of the receiver, the plurality of sensors generating a monopole output in response to the monopole compressional waves propagating in the formation and generating a dipole output, selection means responsive to the monopole output and the dipole output from the plurality of sensors for selecting the monopole output when the monopole compressional wave propagates in the formation; first delay means disposed on one side of the sensor means for delaying the propagation of flexural and compressional waves propagating toward the sensor means from the one side of the sensor means; and second delay means disposed on the other side of the sensor means for delaying the propagation of other flexural and compressional waves propagating toward the sensor means from the other side of the sensor means.
- Assignee:
- Schlumberger Technology Corp., Houston, TX (USA)
- Patent Number(s):
- US 5036945; A
- Application Number:
- PPN: US 7-325405
- OSTI ID:
- 5799541
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
COMPRESSIBLE FLOW
EQUIPMENT
FLUID FLOW
MEASURING INSTRUMENTS
OIL WELLS
PROBES
SEISMIC ARRAYS
SEISMIC SOURCES
SHEAR
SONIC LOGGING
SONIC PROBES
WAVE PROPAGATION
WELL LOGGING
WELL LOGGING EQUIPMENT
WELLS
020200* -- Petroleum-- Reserves
Geology
& Exploration
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
COMPRESSIBLE FLOW
EQUIPMENT
FLUID FLOW
MEASURING INSTRUMENTS
OIL WELLS
PROBES
SEISMIC ARRAYS
SEISMIC SOURCES
SHEAR
SONIC LOGGING
SONIC PROBES
WAVE PROPAGATION
WELL LOGGING
WELL LOGGING EQUIPMENT
WELLS