| Patents for G01V 11 - Prospecting or detecting by methods combining techniques covered by two or more of main groups (3,215) |
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| 07/07/1994 | DE4244577A1 Locating non-ferromagnetic metal parts in steel concrete constructions |
| 06/14/1994 | US5321613 Method of processing electrical signals |
| 04/28/1994 | WO1994009384A1 Method of monitoring deformation of geological structures and predicting geodynamic events |
| 04/19/1994 | CA1328685C Nondestructive downhole seismic vibrator source and process of utilizing the vibrator to obtain information about geologic formations |
| 04/12/1994 | CA1328399C Process and means for measuring geological formations properties in a horizontal borehole drilled from an underground patch |
| 04/05/1994 | US5300929 Method for delineating an anomalous geologic structure |
| 03/29/1994 | US5299128 Method and apparatus for delineating bed boundaries in subsurface formations and for producing indications of the angle of dip thereof |
| 02/16/1994 | EP0485488B1 Total-field imaging probe |
| 02/08/1994 | US5285204 Coil tubing string and downhole generator |
| 12/29/1993 | EP0575318A1 An electronic measurement apparatus movable in a cased borehole and compensating for casing resistance differences. |
| 12/28/1993 | US5274572 Method and apparatus for knowledge-based signal monitoring and analysis |
| 12/21/1993 | CA1325470C Downhole orbital seismic source |
| 11/30/1993 | US5266799 Geophysical survey system |
| 11/23/1993 | US5265016 Method of shear wave velocity estimation |
| 11/23/1993 | CA1324572C Drilling rig and its multiple direction anchoring device to a well |
| 10/19/1993 | US5255245 Total field imaging probe |
| 10/19/1993 | CA1323408C Signal reception system coupled to a well wall or a drilling hole wall |
| 10/12/1993 | US5253219 High count seismic data collection and transmission through analog time multiplexing |
| 10/05/1993 | US5251286 Method for estimating formation permeability from wireline logs using neural networks |
| 09/29/1993 | EP0562687A2 Method of locating hydrocarbon reserves |
| 09/22/1993 | EP0561492A2 Method for estimating formation permeability from wireline logs using neural networks |
| 09/17/1993 | CA2078402A1 Method for estimating formation permeability from wireline logs using neural networks |
| 09/15/1993 | CN1022139C Nondestructive seismic vibrator source and processes of utilizing vibrator to obtain information about geologic formations |
| 09/07/1993 | US5243562 Method and equipment for acoustic wave prospecting in producing wells |
| 08/17/1993 | US5237539 System and method for processing and displaying well logging data during drilling |
| 08/03/1993 | US5233304 Electromagnetic source integrated into an element of a well casing |
| 07/21/1993 | EP0329709B1 Methods and apparatus for measurement of electronic properties of geologigal formations through borehole casing |
| 07/20/1993 | US5228351 Arrangement for measuring the field angle of a magnetic field as a function of axial position within a magnet bore tube |
| 06/29/1993 | US5223794 Methods of operation of apparatus measuring formation resistivity from within a cased well having one measurement and two compensation steps |
| 06/24/1993 | WO1993012443A1 Active and/or passive monitoring system for an underground deposit by using fixed units |
| 06/23/1993 | EP0547961A1 Active or passive surveillance system for underground formation by means of fixed stations |
| 06/16/1993 | EP0546892A1 Method and device for electrically interconnecting apparatuses such as wellbore probes |
| 06/08/1993 | CA1318846C Energy collection method in a single point of a drilling well by pulling of a massive column |
| 05/18/1993 | US5212354 Apparatus and method for detecting seismic waves in a borehole using multiple clamping detector units |
| 05/11/1993 | US5210533 Apparatus and method for positioning a tool in a deviated section of a borehole |
| 04/20/1993 | US5204673 Borehole televiewer system depth encoding and decoding method |
| 04/06/1993 | US5200929 Method for estimating pore fluid pressure |
| 04/06/1993 | US5200581 Method of coupling a seimic detector module to the wall of a borehole, and a sonde for implementing the method |
| 03/30/1993 | US5198770 Logging apparatus having a wall engaging pad with longitudinally aligned detecting devices |
| 03/30/1993 | CA1315191C Method and system for geophysical exploration |
| 03/18/1993 | WO1993005600A1 Communications protocol for well-logging digital telemetry system |
| 03/16/1993 | US5194859 Apparatus and method for positioning a tool in a deviated section of a borehole |
| 03/09/1993 | US5193059 Method for logging a formation for permeability |
| 03/09/1993 | US5192948 Geophone borehole cable |
| 03/02/1993 | US5191326 Communications protocol for digital telemetry system |
| 02/23/1993 | US5189262 Advanced motor driven clamped borehole seismic receiver |
| 02/23/1993 | CA1313897C Method for evaluating organic material contents in sedimentary rocks |
| 02/16/1993 | US5187440 Measuring resistivity changes from within a first cased well to monitor fluids injected into oil bearing geological formations from a second cased well while passing electrical current between the two cased wells |
| 02/09/1993 | US5184682 Device allowing measurements or interventions to be carried out in a well, method using the device and applications of the device |
| 11/03/1992 | US5160814 Hydraulically-actuated downhole seismic source |
| 10/27/1992 | US5159577 Method of monitoring downhole conditions |
| 10/14/1992 | EP0508728A2 Borehole apparatus control system |
| 10/10/1992 | CA2065613A1 Self-contained downhole gauge system |
| 10/01/1992 | WO1992016859A1 An electronic measurement apparatus movable in a cased borehole and compensating for casing resistance differences |
| 08/19/1992 | CN1017940B System for transmission of signals between reception assembly lowered into well and central and recording laboratory |
| 08/11/1992 | US5137109 Method and apparatus for creating seismic waves in a borehole |
| 07/28/1992 | US5134271 Bar code system used in geophysical exploration |
| 07/21/1992 | US5131488 Seismic sources |
| 07/07/1992 | CA1304671C Method of exploration for hydrocarbons |
| 06/30/1992 | US5126939 Method for estimating the organic matter content of sedimentary rocks from data recorded in wells by well-logging probes |
| 05/27/1992 | EP0487426A1 Logging apparatus having a wall engaging pad |
| 05/27/1992 | EP0487425A1 Method and apparatus for handling signals in a logging device |
| 05/27/1992 | EP0487424A1 High resolution logging method and apparatus |
| 05/20/1992 | EP0485488A1 Total-field imaging probe. |
| 05/12/1992 | US5111903 Signal receiving system able to be coupled with the wall of a well or drilling |
| 05/12/1992 | US5111880 System for driving a non rigid exploration device into a well where its progression by gravity is difficult |
| 05/05/1992 | US5109946 Apparatus for pack-off locking of seismic energy source |
| 05/05/1992 | US5109697 Method of exploration for hydrocarbons |
| 05/05/1992 | CA1300270C Iterative disjoint cluster and discriminant function processing of formation log responses and other data |
| 04/28/1992 | CA1299724C Device for borehole sismic data acquisition and transmission to a central monitoring and recording system |
| 04/10/1992 | CA2053117A1 Technique for reducing whirling of a drill string |
| 03/24/1992 | US5099236 Borehole televiewer system depth encoding and decoding method |
| 03/04/1992 | CN1015731B Method of exploration for hydrocarbons |
| 03/03/1992 | US5092423 Downhole seismic array system |
| 03/01/1992 | CA2048526A1 Borehole televiewer system depth encoding and decoding method |
| 02/26/1992 | EP0294440B1 Probe and its multidirectional anchoring device in a well |
| 02/26/1992 | CN1015675B Quantitative determination by elemental logying of subsurface formation properties |
| 01/14/1992 | US5080190 Reversible rigid coupling apparatus and method for borehole seismic transducers |
| 12/24/1991 | US5075626 Electronic measurement apparatus movable in a cased borehole and compensating for casing resistance differences |
| 12/24/1991 | CA1293556C Downhole electromagnetic seismic source |
| 12/11/1991 | EP0460927A2 Method for logging hydraulic characteristics of a formation |
| 12/11/1991 | EP0263149B1 Nondestructive downhole seismic vibrator source and processes of utilizing the vibrator to obtain information about geologic formations |
| 10/29/1991 | US5060751 Pneumatic wall-locking geophone system |
| 09/25/1991 | CN1014094B Downhole electromagnetic seismic source |
| 09/24/1991 | US5051962 Computerized truck instrumentation system |
| 09/03/1991 | US5044460 Downhole seismic exploration device and apparatus |
| 08/27/1991 | US5043669 Methods and apparatus for measurement of the resistivity of geological formations from within cased wells in presence of acoustic and magnetic energy sources |
| 08/27/1991 | US5043668 Methods and apparatus for measurement of electronic properties of geological formations through borehole casing |
| 08/21/1991 | EP0442812A1 Downhole seismic source and method for generating sound waves in a borehole |
| 08/07/1991 | EP0263148B1 Downhole electromagnetic seismic source |
| 07/30/1991 | CA1287160C Method and device for the installation of seismic sensors in a producer oil well |
| 07/30/1991 | CA1287141C System for transmitting signals between a receiving set lowered into a welland a control and recording central laboratory |
| 07/24/1991 | CN1053297A Nondestructive seismic vibrator source and processes of utilizing vibrator to obtain information about geologic formations |
| 07/24/1991 | CN1013312B Apparatus for collecting and transmitting seismic data while drilling |
| 07/24/1991 | CN1013311B Dowhole seismic exploration device and apparatus |
| 07/16/1991 | US5031717 Advanced downhole periodic seismic generator |
| 07/02/1991 | US5027918 Sidewall locking downhole seismic signal detector |
| 06/19/1991 | EP0433126A1 System for moving a non rigid exploration device in a deviated or narrow well |
| 06/19/1991 | EP0433110A1 Tubing element forming an electromagnetic borehole source |
| 06/11/1991 | US5022484 Logging method and apparatus using a sonde equipped with measuring pads |