173231 ⎘
Seismology; Seismic or acoustic prospecting or detecting; Generating seismic energy using piezoelectric or magnetostrictive driving means
SMOOTH HYDROPHONE SPECTRUM DIPS AND EXTEND MEASUREMENT FREQUENCY RANGE
#2ACOUSTIC TRANSDUCER WITH TRAPEZOIDAL, IRREGULARLY PITCHED, OR WIDENED TRANSDUCER ELEMENTS
#3Wedge-Cut Backing Of Acoustic Transducer For Improved Attenuation
#4Low Cross Feed Marine Sensors
#5Multilevel rapid warning system for landslide detection
#6Air layer for improved performance of transducer at low frequencies
#7Through tubing acoustic measurements to determine material discontinuities
#8Through tubing acoustic measurements
#9Borehole fluid gel strength measurement
#10DOWNHOLE IMAGING SYSTEMS, DOWNHOLE ASSEMBLIES, AND RELATED METHODS
#11Ultrasonic transducer with reduced backing reflection
#12Quadruple transmitter and methods to determine wave velocities of a downhole formation
#13Sensor housing and spacer carrier assembly
#14Two-axis sensing element
#15Ultrasonic transducer with suppressed lateral mode
#16Through tubing acoustic imaging
#17A THROUGH BIT DIPOLE ACOUSTIC LOGGING TRANSMITTER AND A LOGGING DEVICE
#18Underwater acoustic source and actuator
#19Method and transducer for acoustic logging
#20Process and system for enhanced depth penetration of an energy source
#21Acoustic transducer
#22Vibratory source for non-vertical boreholes and method
#23Downhole acoustic mapping
#24Encapsulated phased array segment for downhole applications
#25Marine seismic vibrator for low frequency and methods of use
#26Acoustic logging tool utilizing fundamental resonance
#27Downhole piezoelectric acoustic transducer
#28Resonating gas seismic source
#29Modular projector for marine seismic source
#30Tunable resonance in a resonating gas seismic source
#31Low-frequency magnetic reluctance marine seismic source
#32METHODS AND SYSTEMS FOR A SEA-FLOOR SEISMIC SOURCE
#33Methods and systems for monitoring a subsurface formation with a land active streamer
#34Piezoelectric bender with additional constructive resonance
#35Method for calibrating the far-field acoustic output of a marine vibrator
#36CONTROL SYSTEM FOR MARINE VIBRATORS
#37Control system for marine vibrators operating near impulsive seismic signal sources
#38Control system for marine vibrators to reduce friction effects
#39Acoustic dipole piston transmitter
#40Controlled-frequency downhole seismic source
#41Bender bar transducer with at least three resonance modes
#42Piston integrated variable mass load
#43Tunable acoustic transmitter for downhole use
#44Low-frequency magnetic reluctance marine seismic source
#45Sensor for measuring water levels of groundwater and surface water using magnetostriction displacement and multi measurement system for groundwater and surface water by using the same
#46Asymmetric bender bar transducer
#47Compliance chambers for marine vibrators
#48Acoustic transducer with impedance matching layer
#49Acoustic source with piezoelectric actuator array and stroke amplification for broad frequency range acoustic output
#50Coherent sound source for marine seismic surveys
#51Acoustic logging apparatuses and methods
#52Low frequency marine acoustic vibrator
#53Variable mass load marine vibrator
#54System and method for seismic surveying using distributed sources
#55System and method for acoustic imaging using a transducer array
#56Systems, methods, and apparatus to drive reactive loads
#57Volumetric piezoelectric seismic wave source and related methods
#58Acoustic transducer with impedance matching layer
#59Method of controlled pulse driving of a stacked PZT bender bar for dipole acoustic radiation
#60Electromagnetic linear actuators for marine acoustic vibratory sources
#61Systems, methods, and apparatus to drive reactive loads
#62Apparatus and method for determining formation anisotropy
#63Acoustic traveling wave tube system and method for forming and propagating acoustic waves
#64Seismic source which incorporates earth coupling as part of the transmitter resonance
#65Control system for marine vibrators and seismic acquisition system using such control system
#66Method and apparatus for acoustic impedance and P-wave anisotropy measurements
#67Lift-based acoustic source
#68Highly adaptable seismic source
#69Coherent sound source for marine seismic surveys