| 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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| 02/02/1988 | US4722220 Concentration at a given depth of minerals determined from concentration of elements |
| 01/12/1988 | CA1231428A1 Simultaneous digitizing of all receivers in acoustic tool |
| 01/05/1988 | US4718011 Well logging data acquisition, telemetry and control method and system |
| 12/29/1987 | US4715470 Downhole electromagnetic seismic source |
| 12/29/1987 | US4715469 Borehole seismic receiver |
| 12/22/1987 | US4715002 System for recording a variable value, notably in a well, and for compressing stored measurement interval data |
| 12/15/1987 | US4712424 Method for investigating an earth formation |
| 12/02/1987 | CN86107762A Process for prediction resp. observation of natural resp. artificially induced seismicity as well as preventive protection of establishments |
| 12/01/1987 | US4710906 Method and system for monitoring the stability of boreholes |
| 11/17/1987 | CA1229414A1 In situ determination of hydrocarbon characteristics including oil api gravity |
| 11/10/1987 | US4706228 Asymmetrical lateral-force seismic source transducer |
| 11/03/1987 | CA1228910A1 Apparatus for producing geophysical measurements in a borehole |
| 10/27/1987 | US4703277 Method and apparatus for obtaining properties of subsurface formations from textural models derived from formation parameters |
| 10/27/1987 | US4702343 Nondestructive downhole seismic vibrator source and processes of utilizing the vibrator to obtain information about geologic formations |
| 10/27/1987 | CA1228645A1 Dynamic downhole recorder |
| 10/21/1987 | EP0242256A1 Process and device for measuring characteristics of geological formations in a horizontal borehole coming from an underground tunnel |
| 10/20/1987 | US4701890 Device for locking a set of gimbal-mounted detectors |
| 10/13/1987 | US4699240 Device for applying pulsed radial stresses to the wall of a well |
| 10/07/1987 | CN87101987A Nondestructive downhole seismic vibrator source and processes of utilizing vibrator to obtain information about geologic formations |
| 10/07/1987 | CN87101970A Downhole electromagnetic seismic source |
| 09/30/1987 | EP0239464A2 Seismic and logging tool and method |
| 09/24/1987 | WO1987005708A1 Nondestructive downhole seismic vibrator source and processes of utilizing the vibrator to obtain information about geologic formations |
| 09/24/1987 | WO1987005707A1 Downhole electromagnetic seismic source |
| 08/20/1987 | DE3701189A1 Method and device for fitting seismic sensors in an oil production well |
| 08/20/1987 | DE3611374C1 Chain-shaped arrangement of several borehole probes |
| 08/19/1987 | EP0232646A1 Immobilizing device for a cardan-mounted detector set |
| 08/11/1987 | US4686653 Method and device for making geophysical measurements within a wellbore |
| 08/11/1987 | US4686625 Method and apparatus for generating a display of well logging measurements |
| 08/05/1987 | EP0230812A1 Seismic probe, in particular for use in a non-tubed borehole |
| 08/04/1987 | US4684947 Simultaneous digitizing apparatus for an acoustic tool |
| 07/29/1987 | CN87100310A Process and device for installing seismic sensors inside petroleum production well |
| 06/03/1987 | EP0224285A2 Acoustic logging device |
| 06/02/1987 | US4670862 Apparatus for producing geophysical measurements in a borehole |
| 04/28/1987 | US4661932 Dynamic downhole recorder |
| 04/15/1987 | EP0218358A1 Borehole seismic receiver |
| 03/17/1987 | US4651311 Electrodeless spark discharge acoustic pulse transducer for borehole operation |
| 03/10/1987 | US4648268 Method of defining homogeneous rock formation zones along a borehole on the basis of logs |
| 03/04/1987 | CN86105507A Downhole seismic exploration device and apparatus |
| 02/25/1987 | CN86106827A Quantitative determination by elemental logging of subsurface formation properties |
| 02/25/1987 | CN86105318A Borehole seismic receiver |
| 02/24/1987 | US4646240 Method and apparatus for determining geological facies |
| 02/24/1987 | US4646083 Borehole measurement and telemetry system |
| 02/10/1987 | CA1217715A Method for determining oil saturation in a subsurface formation |
| 02/04/1987 | EP0210925A2 Downhole seismic exploration device and apparatus |
| 01/20/1987 | CA1216924A1 Measuring device for a seismic profile within a well- bore |
| 12/30/1986 | US4633446 Scrolling well logging data display method and apparatus |
| 12/30/1986 | US4632484 Connector for ceramic hybrid circuits for well-logging tools and method for connecting ceramic hybrid circuits for use in well-logging tools |
| 12/23/1986 | CA1215744A1 Connector for ceramic hybrid circuits for well- logging tools |
| 11/18/1986 | US4622849 Method and apparatus for determining characteristics of clay-bearing formations |
| 11/12/1986 | CA1213969A Method and device for making geophysical measurements within a wellbore |
| 10/21/1986 | US4617825 Well logging analysis methods for use in complex lithology reservoirs |
| 10/21/1986 | CA1213080A1 Method and apparatus for determining characteristics of clay-bearing formations |
| 10/14/1986 | US4616703 Device for anchoring a probe in a well, by opening mobile arms |
| 10/14/1986 | CA1212782A1 Method for identifying complex lithologies in a subsurface formation |
| 09/30/1986 | US4614250 Logging method and apparatus using a sonde equipped with measuring pads |
| 09/16/1986 | CA1211551A1 Seismic pulse generator for a borehole |
| 09/09/1986 | US4610309 Downhole tool |
| 08/19/1986 | US4607352 Method and apparatus for obtaining a display of a characteristic of the periphery of a well |
| 08/19/1986 | CA1210125A1 Down hole periodic seismic generator |
| 08/06/1986 | EP0189776A1 Device for measuring vibrations |
| 06/17/1986 | US4594887 Method and apparatus for determining characteristics of clay-bearing formations |
| 06/17/1986 | CA1206248A1 Method and apparatus for seismic signal acquisition in a borehole |
| 05/13/1986 | CA1204495A1 Method and apparatus for obtaining a display of a characteristic of the periphery of a well |
| 05/06/1986 | US4587641 Downhole fracture analysis |
| 04/29/1986 | US4586137 Method for generating variable well logging data composites |
| 04/29/1986 | US4584874 Method for determining porosity, clay content and mode of distribution in gas and oil bearing shaly sand reservoirs |
| 04/29/1986 | CA1203882A1 Method and system for producing a ppi display |
| 04/29/1986 | CA1203747A1 Outrigger arm displacement control mechanism and method |
| 04/23/1986 | EP0178784A2 Horizontally stabilized borehole sonde |
| 04/22/1986 | US4584675 Method for transmitting data |
| 04/22/1986 | US4583397 Method of geophysical exploration in a well borehole |
| 04/15/1986 | US4583093 Telemetry driving circuit |
| 03/26/1986 | EP0175298A2 Borehole sensing tool with optical rotation sensor |
| 03/25/1986 | US4578785 Two-component acoustic borehole tool |
| 03/25/1986 | US4578579 Method for depth referencing hydrocarbon gas shows on mud logs |
| 03/11/1986 | US4575831 Method and apparatus for acquiring seismic signals in a borehole |
| 02/13/1986 | WO1986001002A1 Device for recording seismoelectric signals |
| 02/11/1986 | US4569412 Seismic source |
| 01/28/1986 | CA1200014A1 Method for generating variable well logging data composites |
| 01/28/1986 | CA1200003A1 Method and apparatus for seismic signal acquisition in a borehole |
| 01/21/1986 | USRE32070 Borehole apparatus for investigating subsurface earth formations including a plurality of pad members and means for regulating the bearing pressure thereof |
| 01/07/1986 | US4563757 Method and apparatus for acquiring seismic signals in a borehole |
| 12/03/1985 | US4556884 Depth dependent multiple logging system |
| 11/27/1985 | EP0162767A1 Apparatus for applying a pulsating radial strain to a borehole wall |
| 10/30/1985 | EP0159944A2 Method and apparatus for obtaining properties of subsurface formations |
| 10/29/1985 | US4549630 Continuous shear wave logging apparatus |
| 10/22/1985 | US4548071 Determination of oil shale yield from well log data |
| 10/09/1985 | EP0157662A1 Apparatus for the reception of acoustical waves in a borehole |
| 10/02/1985 | EP0156660A1 Apparatus for geophysical measurements in a bore hole |
| 09/25/1985 | EP0155462A1 Well probe |
| 09/17/1985 | US4542488 Method and system for producing a PPI display |
| 08/27/1985 | US4538248 Recording system for a borehole logging tool |
| 08/07/1985 | EP0151073A2 Quantitative determination by elemental logging of subsurface formation properties |
| 07/30/1985 | US4532614 Wall bore electrical generator |
| 07/23/1985 | US4531204 Computerized truck instrumentation system |
| 07/23/1985 | US4531188 Methods for automatic processing of information obtained by well logging |
| 07/17/1985 | EP0148667A1 Process and device for geophysical measurements in a bore hole |
| 07/10/1985 | EP0147925A1 Combination infrared microwave intrusion detector |
| 07/09/1985 | CA1190137A1 Recessed mounting device for instruments and its backfolding arms |
| 06/26/1985 | EP0146423A1 Device for measuring the seismic profile in a borehole |