Impedance matched joined drill pipe for improved acoustic transmission
Patent
·
OSTI ID:873182
- San Mateo, CA
An impedance matched jointed drill pipe for improved acoustic transmission. A passive means and method that maximizes the amplitude and minimize the temporal dispersion of acoustic signals that are sent through a drill string, for use in a measurement while drilling telemetry system. The improvement in signal transmission is accomplished by replacing the standard joints in a drill string with joints constructed of a material that is impedance matched acoustically to the end of the drill pipe to which it is connected. Provides improvement in the measurement while drilling technique which can be utilized for well logging, directional drilling, and drilling dynamics, as well as gamma-ray spectroscopy while drilling post shot boreholes, such as utilized in drilling post shot boreholes.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- Regents of University of California (Oakland, CA)
- Patent Number(s):
- US 6108268
- OSTI ID:
- 873182
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/367/175/340/439/
accomplished
acoustic
acoustic signal
acoustic signals
acoustic transmission
acoustically
amplitude
boreholes
connected
constructed
directional
directional drilling
dispersion
drill
drill pipe
drill string
drilling
dynamics
gamma-ray
gamma-ray spectroscopy
impedance
impedance matched
improved
improved acoustic
improvement
joined
jointed
joints
logging
matched
material
maximizes
means
measurement
method
minimize
passive
pipe
post
provides
ray spectroscopy
replacing
shot
signal
signal transmission
signals
spectroscopy
standard
string
technique
telemetry
temporal
transmission
utilized
accomplished
acoustic
acoustic signal
acoustic signals
acoustic transmission
acoustically
amplitude
boreholes
connected
constructed
directional
directional drilling
dispersion
drill
drill pipe
drill string
drilling
dynamics
gamma-ray
gamma-ray spectroscopy
impedance
impedance matched
improved
improved acoustic
improvement
joined
jointed
joints
logging
matched
material
maximizes
means
measurement
method
minimize
passive
pipe
post
provides
ray spectroscopy
replacing
shot
signal
signal transmission
signals
spectroscopy
standard
string
technique
telemetry
temporal
transmission
utilized