| 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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| 05/16/1991 | CA2029938A1 Electromagnetic source for permanent installation into a well |
| 05/07/1991 | US5012675 Integrating multiple mappable variables for oil and gas exploration |
| 05/07/1991 | US5012674 Method of exploration for hydrocarbons |
| 04/24/1991 | EP0424308A2 Geophysical survey system |
| 03/06/1991 | CN1011920B Nondestructive downhole seismic vibrator source |
| 02/27/1991 | CN1011827B Process and device for installing seismic sensors inside petroleum production well |
| 02/26/1991 | CA1280687C Flapper pad arrangement for logging sonde |
| 02/13/1991 | EP0412384A2 Boreholeprobe for impulse seismic measurements |
| 02/02/1991 | WO1991002269A1 Total-field imaging probe |
| 02/02/1991 | CA2059650A1 Total field imaging probe |
| 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 | CN1011348B Railway type erathquake focus under well |
| 01/22/1991 | US4986350 Device for the seismic monitoring of an underground deposit |
| 12/27/1990 | CA1278342C Methods and apparatus for measurement of electronic properties of geological formations through borehole casing |
| 12/04/1990 | CA1277412C Seismic and logging tool and method |
| 10/10/1990 | CN1009967B Borehole seismic receiver |
| 09/25/1990 | CA1274617A1 Device for receiving acoustic waves in a well |
| 09/11/1990 | CA1274014A1 Borehole seismic receiver |
| 09/04/1990 | US4953399 Method and apparatus for determining characteristics of clay-bearing formations |
| 08/28/1990 | US4953136 Downhole seismic exploration device and apparatus |
| 07/03/1990 | US4939648 Apparatus and method for monitoring well logging information |
| 06/26/1990 | US4937747 Iterative disjoint cluster and discriminant function processing of formation log responses and other data |
| 05/23/1990 | CN1042396A Method of exploration for hydrocarbons |
| 05/14/1990 | EP0329709A4 Methods and apparatus for measurement of electronic properties of geologigal formations through borehole casing. |
| 05/09/1990 | EP0367495A2 Method and apparatus for oil and gas exploration |
| 04/10/1990 | US4916616 Self-consistent log interpretation method |
| 04/10/1990 | US4914944 Situ determination of hydrocarbon characteristics including oil api gravity |
| 04/03/1990 | US4914432 Apparatus for locating a member in a borehole |
| 03/28/1990 | EP0360652A1 Signal reception system that can be linked to the wall of a well or borehole |
| 02/27/1990 | US4903527 Quantitative clay typing and lithological evaluation of subsurface formations |
| 02/13/1990 | CA1265682A1 Method of measuring and regulating the concentration of a fibre suspension and a device for carrying out the method |
| 02/06/1990 | US4899322 Integrated geophysical survey system |
| 02/06/1990 | US4898237 Probe and its multidirectional anchoring device in a well |
| 01/24/1990 | EP0352148A1 Device and method for performing measurements or interventions in a borehole |
| 01/02/1990 | US4890486 In situ determination of hydrocarbon characteristics |
| 12/14/1989 | DE3819818A1 Measuring method for surveying the ground in the zone in front of the face during underground driving of tunnel cross-sections |
| 11/21/1989 | US4882542 Methods and apparatus for measurement of electronic properties of geological formations through borehole casing |
| 11/08/1989 | EP0341109A1 Method for evaluating the organic material content of sediments from data acquired by borehole logging probes |
| 11/07/1989 | US4879695 Method of locating a member in a borehole |
| 10/17/1989 | US4874061 Downhole orbital seismic source |
| 10/17/1989 | US4874060 Device for receiving sound waves in a well |
| 09/26/1989 | CA1261978A1 Method for determining porosity, clay content and mode of distribution in gas and oil bearing shaly sand reservoirs |
| 09/26/1989 | CA1261459A1 Acoustic logging device |
| 09/12/1989 | CA1259398A1 Seismic impulse source transducer |
| 08/30/1989 | EP0329709A1 Methods and apparatus for measurement of electronic properties of geologigal formations through borehole casing. |
| 08/29/1989 | US4862425 Device for acquiring seismic data in a borehole and transmission thereof to a central control and recording system |
| 08/29/1989 | US4862090 Measuring pad arrangement for a logging sonde |
| 08/15/1989 | US4857831 Borehole casing diagnostic apparatus and method |
| 08/08/1989 | US4855732 System for the transmission of signals between a reception assembly lowered into a well and a central control and recording laboratory |
| 08/02/1989 | CN1034435A Downhole orbital seismic source |
| 07/26/1989 | EP0325029A2 Dowhole orbital seismic source |
| 07/25/1989 | US4852069 Thin bed evaluation device |
| 07/04/1989 | US4844197 Hydraulic release system for use in a borehole apparatus |
| 07/04/1989 | CA1257013A1 Quantitative determination by elemental logging of subsurface formation properties |
| 06/07/1989 | EP0319413A1 Method of generating a lithological cross-section |
| 05/23/1989 | CA1254674A1 Method of geophysical exploration in a well borehole |
| 05/23/1989 | CA1254648A1 Derive for imparting radial stress pulses on a well bore |
| 04/25/1989 | CA1253204A1 Apparatus for surveying of boreholes |
| 04/11/1989 | US4820989 Methods and apparatus for measurement of the resistivity of geological formations from within cased boreholes |
| 04/11/1989 | US4819760 Locking arm for well tool |
| 03/28/1989 | US4815557 Down hole seismographic source |
| 03/14/1989 | US4811814 Measuring device for a seismic profile within a well-bore |
| 02/28/1989 | US4808996 Simultaneous digitizing apparatus for an acoustic tool |
| 02/21/1989 | US4805727 Down hole periodic seismic generator |
| 02/21/1989 | US4805725 Nondestructive downhole seismic vibrator source and processes of utilizing the vibrator to obtain information about geologic formations |
| 02/15/1989 | EP0303536A1 A method of coupling a seismic detector module to the wall of a borehole, and a sonde for implementing the method |
| 01/10/1989 | US4796723 System for transmitting energy through an apparatus usable for subsoil prospection, lowered inside a well or drill hole |
| 01/03/1989 | US4794791 Method and device for making measurements characterizing geological formations, in a horizontal borehole formed from an underground way |
| 12/27/1988 | US4794336 Apparatus for surveying a borehole comprising a magnetic measurement probe to be moved within a drill pipe to a measurment position within a non-magnetic collar |
| 12/14/1988 | EP0294440A1 Probe and its multidirectional anchoring device in a well. |
| 12/13/1988 | US4791618 Well logging method and system for detecting structural and stratigraphic geological make-up of subsurface formations |
| 11/15/1988 | US4784238 Large diameter borehole apparatus |
| 11/08/1988 | US4783771 Nondestructive downhole seismic vibrator source and processes of utilizing the vibrator to obtain information about geologic formations |
| 10/19/1988 | CN88101902A Apparatus for collecting seismic data and transmitting it to centre system of control and record while drilling |
| 10/19/1988 | CN88101702A System for transmission of signals between reception assembly lowered into well and central and recording laboratory |
| 10/05/1988 | EP0285519A1 Apparatus for borehole seismic data acquisition and their transmission to a central control and recording system |
| 10/05/1988 | EP0285507A1 Signal transmission system between a receiver unit down in a borehole and a central control and receiving station |
| 10/05/1988 | EP0285473A1 Flapper pad arrangement for logging sonde |
| 10/04/1988 | US4775009 Process and device for installing seismic sensors inside a petroleum production well |
| 09/27/1988 | US4773264 Permeability determinations through the logging of subsurface formation properties |
| 08/23/1988 | US4765435 Mobile well-logging laboratory |
| 08/16/1988 | US4764903 Method and apparatus to determine permeability of rock formations adjacent a borehole |
| 07/27/1988 | EP0263149A4 Nondestructive downhole seismic vibrator source and processes of utilizing the vibrator to obtain information about geologic formations. |
| 07/27/1988 | EP0263148A4 Downhole electromagnetic seismic source. |
| 07/19/1988 | US4757873 For logging open and cased wells in the oil and gas industry |
| 07/14/1988 | WO1988005108A1 Probe and its multidirectional anchoring device in a well |
| 07/12/1988 | US4756189 Method and apparatus for determining characteristics of clay-bearing formations |
| 07/05/1988 | CA1238851A1 Device for anchoring a probe in a well by means of spreading grippers |
| 06/21/1988 | US4752882 Method for determining the effective water saturation in a low-resistivity hydrocarbon-bearing rock formation based upon rock matrix conductance |
| 06/14/1988 | US4751688 Downhole electromagnetic seismic source |
| 05/19/1988 | WO1988003657A1 Methods and apparatus for measurement of electronic properties of geologigal formations through borehole casing |
| 05/17/1988 | US4744438 Seismic probe more particularly usable in an untubed drilling shaft |
| 05/17/1988 | CA1236910A1 Downhole fracture analysis |
| 05/03/1988 | US4742402 Seismoelectric signal recording device |
| 04/14/1988 | DE3701039A1 Seismic pulse source transducer |
| 04/13/1988 | EP0263149A1 Nondestructive downhole seismic vibrator source and processes of utilizing the vibrator to obtain information about geologic formations. |
| 04/13/1988 | EP0263148A1 Downhole electromagnetic seismic source. |
| 03/08/1988 | CA1233877A1 Borehole sensing tool with optical rotation sensor |
| 02/16/1988 | US4725783 Cable connection head for a well logging cable useful at high temperatures |