| Patents for G01V 1 - Seismology; Seismic or acoustic prospecting or detecting (27,288) |
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| 04/09/1991 | US5005416 Insect detection using a pitfall probe trap having vibration detection |
| 04/05/1991 | CA2025489A1 Characterization of the full elastic effect of the near surface on seismic waves |
| 04/04/1991 | WO1991004544A1 Method for modelling a surface and device for implementing same |
| 04/02/1991 | US5005159 Continuity logging using differenced signal detection |
| 04/02/1991 | US5004050 Method for well stimulation in the process of oil production and device for carrying same into effect |
| 04/02/1991 | CA1282486C Apparatus and method for locating towed seismic apparatus |
| 03/27/1991 | EP0419245A2 Coding seismic sources |
| 03/27/1991 | CN1012220B Suspension type eddy seismonmeter |
| 03/26/1991 | US5003517 Magnetohydrodynamic fluid apparatus and method |
| 03/26/1991 | US5003285 Transducer array |
| 03/21/1991 | DE3929077A1 Acoustic identification and classification of helicopters - using mathematical model transforming ambient noise into frequency domain and identifying rotor frequency ratio from power spectrum |
| 03/20/1991 | EP0418141A1 Method for sonar beam forming, particularly for towed sonar |
| 03/20/1991 | EP0417365A1 Marine casing suspension apparatus |
| 03/20/1991 | CN1050095A High-freq mine seismograph |
| 03/19/1991 | US5001682 Method and apparatus for detecting seismic events |
| 03/19/1991 | US5001679 Dual shuttle air gun |
| 03/19/1991 | US5001677 Methods for processing and displaying seismic data |
| 03/19/1991 | US5001676 Acoustic borehole logging |
| 03/19/1991 | US5001466 Earthquake detector |
| 03/19/1991 | US5000285 Apparatus for imparting seismic signals into the earth |
| 03/16/1991 | WO1991004501A1 Method of high-resolution sea bottom prospecting and tuned array of paraboloidal, electroacoustic transducers to carry out such method |
| 03/16/1991 | CA2025339A1 Beam forming method for a sonar, particularly a towed sonar |
| 03/13/1991 | EP0416992A1 Linear hydrophonic antenna and electronic device which resolves left-right ambiguity associated with this antenna |
| 03/13/1991 | EP0416911A2 Ultrasonic air-in-line detector self-test technique |
| 03/13/1991 | EP0416006A1 Seismic wave generating apparatus |
| 03/13/1991 | CN1012021B Receiver of alternative electric information for premonition of earthquake |
| 03/12/1991 | US4999817 Programmable gain control for rotating transducer ultrasonic tools |
| 03/12/1991 | US4998601 Method of and apparatus for controlled operation of an elevator system at the occurrence of an earthquake |
| 03/12/1991 | CA1281408C Variflux vibration transducer |
| 03/12/1991 | CA1281207C Method and device for determining the structural condition of a volume or mass of rock or stone and of how steady fixing elements such as roofbolts are anchored therein |
| 03/06/1991 | EP0415848A1 Method for monitoring flexible tubular cables and pipes during operation and acoustical pickup to implement this method |
| 03/06/1991 | CN1011920B Nondestructive downhole seismic vibrator source |
| 03/05/1991 | US4998227 Device for seismic exploration |
| 03/05/1991 | CA1281123C Line array transducer assembly |
| 03/05/1991 | CA1281121C Method of suppressing vibration seismic signal correlation noise |
| 03/05/1991 | CA1281120C Signal processing to enable utilization of a rig reference sensor with a drill bit seismic source |
| 03/05/1991 | CA1281119C Control system for inclined impact-type surface seismic source |
| 03/05/1991 | CA1281118C Axial borehole televiewer |
| 03/05/1991 | CA1281117C Method for driving a bender-type transmitter of a borehole logging tool to sequentially produce acoustic compressional and tube waves |
| 02/27/1991 | EP0414344A2 Marine seismic reflection geophysical surveying |
| 02/27/1991 | CN1011827B Process and device for installing seismic sensors inside petroleum production well |
| 02/27/1991 | CN1011826B Apparatus for inducing elliptically polarized shear waves in earth medium |
| 02/26/1991 | US4996675 Signal sensor insensitive to static pressure variations |
| 02/26/1991 | US4995168 Technique for locating submerged and buried pipelines |
| 02/21/1991 | WO1991002266A1 Method and apparatus for seismic exploration |
| 02/20/1991 | CN1049411A Detecting method of hydrocarbon with seismic prospecting |
| 02/19/1991 | US4995013 Directional modular linear hydrophonic antenna |
| 02/19/1991 | US4995011 Acoustic mapping system using tomographic reconstruction |
| 02/19/1991 | US4995008 Method of using a circularly-polarized source to characterize seismic anisotropy |
| 02/19/1991 | US4995007 Method for processing seismic data |
| 02/19/1991 | CA1280502C Method for selection of mining and drilling sites using synthesized three dimensional seismic data |
| 02/13/1991 | EP0412384A2 Boreholeprobe for impulse seismic measurements |
| 02/13/1991 | CN1011625B Method for geophysical exploration |
| 02/12/1991 | US4993001 Method and apparatus for converting tube waves to body waves for seismic exploration |
| 02/12/1991 | US4992996 Interval velocity analysis and depth migration using common reflection point gathers |
| 02/12/1991 | US4992995 Methods for attenuating noise in seismic data |
| 02/12/1991 | US4992994 Borehole televiewer for fracture detection and cement evaluation |
| 02/12/1991 | US4992993 Correction for variable water-column velocity in seismic data |
| 02/12/1991 | US4992992 Processing for seismic data from slanted cable |
| 02/12/1991 | US4992991 Marine seismic receiving system employing multiple depth hydrostreamer cable |
| 02/12/1991 | US4992990 Method for determining the position of seismic streamers in a reflection seismic measuring system |
| 02/12/1991 | US4991685 Downhole seismic source |
| 02/12/1991 | US4991684 Method and apparatus for detonation of distributed charges |
| 02/12/1991 | US4991439 Apparatus for detecting insect-induced vibrations in particulate matter |
| 02/12/1991 | CA1280200C Method of acquiring and interpreting seismic data to obtain lithologicalparameters |
| 02/11/1991 | CA2015389A1 Three-dimensional seismic prospecting method |
| 02/06/1991 | EP0412013A1 Method of treating seismic reflection data to obtain seismic cross-sections |
| 02/05/1991 | US4991145 Infra-sonic detector and alarm with self adjusting reference |
| 02/05/1991 | US4991095 Process for three-dimensional mathematical modeling of underground geologic volumes |
| 02/05/1991 | US4990913 Analog to digital converter for highly dynamic signals, using a variable reference voltage to floating decimal point output |
| 02/05/1991 | CA2022644A1 Reflection seismic data processing method for obtaining improved seismic cuts |
| 02/05/1991 | CA1279922C Borehole logging method for determining the damping of acoustic tube waves in subsurface formations along a borehole wall |
| 01/30/1991 | EP0409863A1 Improvements in or relating to arrays of filamentary form |
| 01/30/1991 | CN2070454U 数模兼容式水动态测量仪 Compatible dynamic modulus type water meter |
| 01/29/1991 | US4987969 Method of coupling a seismic detector module to the wall of a borehole and a sonde for implementing the method |
| 01/23/1991 | EP0409361A2 Downhole seismic exploration device and apparatus |
| 01/23/1991 | EP0408667A1 Acoustic data transmission through a drill string. |
| 01/23/1991 | EP0247187B1 Tubular article |
| 01/23/1991 | CN2070007U Controllable portable oscillator |
| 01/23/1991 | CN1011350B Deviding method for vertical earthquake section |
| 01/23/1991 | CN1011349B Ground sound locator with at least single three component geophone probes |
| 01/23/1991 | CN1011348B Railway type erathquake focus under well |
| 01/23/1991 | CN1011347B Device for engendering acoustic waves by means of strike of falling mass on target anchored in well |
| 01/23/1991 | CN1011346B Telescoping tube omni-directional shear wave vibrator |
| 01/22/1991 | US4987561 Seismic imaging of steeply dipping geologic interfaces |
| 01/22/1991 | US4986350 Device for the seismic monitoring of an underground deposit |
| 01/22/1991 | CA1279397C Acoustic energy transmitter for borehole logging |
| 01/22/1991 | CA1279374C Seismic signal transmission system using radio relays |
| 01/19/1991 | CA2002491A1 Method of shear wave velocity estimation |
| 01/15/1991 | US4985873 Method and apparatus for determining compressional first arrival times from waveform threshold crossings provided by apparatus disposed in a sonic well tool |
| 01/15/1991 | US4984652 Torsional wave logging tool |
| 01/15/1991 | CA1279123C Method of determining position and dimensions of a subsurface structure intersecting a wellbore in the earth |
| 01/15/1991 | CA1279001C Process for the detection of heterogenous spots and/or the petrophysical caracteristics of the geological strata of a study site |
| 01/10/1991 | WO1991000579A1 Transducers and alarm systems incorporating them |
| 01/10/1991 | WO1991000533A1 Device for vibrational excitation of seismic waves |
| 01/09/1991 | CN1048471A Acquisition method and device allowing to precisely digitize analog signals |
| 01/08/1991 | US4984222 Piezoelectric sensor comprising at least one pair of flexible sensitive elements of great length |
| 01/08/1991 | US4984221 Borehole acoustic logging system having automatic reflection signal level control |
| 01/08/1991 | US4984220 Geophysical exploration using velocity spectra regional coherency peaks |
| 01/08/1991 | US4984218 Marine acoustic array configured for tow noise reduction |