CA2546695A1 - Method and system for transmitting signals through a metal tubular - Google Patents
Method and system for transmitting signals through a metal tubular Download PDFInfo
- Publication number
- CA2546695A1 CA2546695A1 CA002546695A CA2546695A CA2546695A1 CA 2546695 A1 CA2546695 A1 CA 2546695A1 CA 002546695 A CA002546695 A CA 002546695A CA 2546695 A CA2546695 A CA 2546695A CA 2546695 A1 CA2546695 A1 CA 2546695A1
- Authority
- CA
- Canada
- Prior art keywords
- signals
- metal tubular
- non magnetic
- magnetic metal
- electromagnetic signals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
Abstract
A method for transmitting signals through a metal tubular includes the steps of transmitting modulated electromagnetic signals through a non magnetic metal section of the metal tubular, detecting the signals or a field associated with the signals, and controlling or monitoring devices or operations associated with the metal tubular responsive to the signals. A material, geometry, treatment, and alloying of the non magnetic metal section are selected to optimize signal transmission therethrough. A system for performing the method includes the metal tubular and the non magnetic metal section. The system can also include a transmitter device configured to move through the metal tubular emitting the electromagnetic signals, an antenna on the outside of the non magnetic metal section configured to detect the electromagnetic signals, and a receiver-control circuit configured to generate control signals responsive to the electromagnetic signals.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/726,027 | 2003-12-01 | ||
US10/726,027 US7063148B2 (en) | 2003-12-01 | 2003-12-01 | Method and system for transmitting signals through a metal tubular |
PCT/US2004/040047 WO2005054876A2 (en) | 2003-12-01 | 2004-11-30 | Method and system for transmitting signals through a metal tubular |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2546695A1 true CA2546695A1 (en) | 2005-06-16 |
CA2546695C CA2546695C (en) | 2009-01-20 |
Family
ID=34620414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002546695A Active CA2546695C (en) | 2003-12-01 | 2004-11-30 | Method and system for transmitting signals through a metal tubular |
Country Status (5)
Country | Link |
---|---|
US (1) | US7063148B2 (en) |
EP (1) | EP1689975B1 (en) |
CA (1) | CA2546695C (en) |
NO (1) | NO338561B1 (en) |
WO (1) | WO2005054876A2 (en) |
Families Citing this family (70)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7283061B1 (en) * | 1998-08-28 | 2007-10-16 | Marathon Oil Company | Method and system for performing operations and for improving production in wells |
US20040239521A1 (en) | 2001-12-21 | 2004-12-02 | Zierolf Joseph A. | Method and apparatus for determining position in a pipe |
US7014100B2 (en) | 2001-04-27 | 2006-03-21 | Marathon Oil Company | Process and assembly for identifying and tracking assets |
US7350590B2 (en) * | 2002-11-05 | 2008-04-01 | Weatherford/Lamb, Inc. | Instrumentation for a downhole deployment valve |
US7255173B2 (en) | 2002-11-05 | 2007-08-14 | Weatherford/Lamb, Inc. | Instrumentation for a downhole deployment valve |
GB0425008D0 (en) * | 2004-11-12 | 2004-12-15 | Petrowell Ltd | Method and apparatus |
JP2006321043A (en) | 2005-05-17 | 2006-11-30 | Milwaukee Electric Tool Corp | Power tool, battery, battery charger, and operating method thereof |
JP2006325395A (en) | 2005-05-17 | 2006-11-30 | Milwaukee Electric Tool Corp | Power tool, battery, charger, and operating method of these |
US20080001775A1 (en) * | 2006-06-30 | 2008-01-03 | Baker Hughes Incorporated | Apparatus and method for memory dump and/or communication for mwd/lwd tools |
US8001858B2 (en) * | 2007-01-19 | 2011-08-23 | Cogen William | Pipeline inspection apparatus and method using radio frequency identification and inertial navigation |
US10262168B2 (en) | 2007-05-09 | 2019-04-16 | Weatherford Technology Holdings, Llc | Antenna for use in a downhole tubular |
DK178464B1 (en) * | 2007-10-05 | 2016-04-04 | Mærsk Olie Og Gas As | Method of sealing a portion of annulus between a well tube and a well bore |
GB0720421D0 (en) | 2007-10-19 | 2007-11-28 | Petrowell Ltd | Method and apparatus for completing a well |
GB0804306D0 (en) | 2008-03-07 | 2008-04-16 | Petrowell Ltd | Device |
US9194227B2 (en) | 2008-03-07 | 2015-11-24 | Marathon Oil Company | Systems, assemblies and processes for controlling tools in a wellbore |
US10119377B2 (en) | 2008-03-07 | 2018-11-06 | Weatherford Technology Holdings, Llc | Systems, assemblies and processes for controlling tools in a well bore |
US7762330B2 (en) * | 2008-07-09 | 2010-07-27 | Smith International, Inc. | Methods of making multiple casing cuts |
US20100139386A1 (en) * | 2008-12-04 | 2010-06-10 | Baker Hughes Incorporated | System and method for monitoring volume and fluid flow of a wellbore |
GB0914650D0 (en) * | 2009-08-21 | 2009-09-30 | Petrowell Ltd | Apparatus and method |
GB2475910A (en) * | 2009-12-04 | 2011-06-08 | Sensor Developments As | Wellbore measurement and control with inductive connectivity |
US8839871B2 (en) | 2010-01-15 | 2014-09-23 | Halliburton Energy Services, Inc. | Well tools operable via thermal expansion resulting from reactive materials |
US8850899B2 (en) | 2010-04-15 | 2014-10-07 | Marathon Oil Company | Production logging processes and systems |
NO20100691A1 (en) | 2010-05-12 | 2011-11-14 | Roxar Flow Measurement As | Transmission system for communication between borehole elements |
CN101976364B (en) * | 2010-10-19 | 2016-04-20 | 华中科技大学 | Oil well data exchange system |
US8474533B2 (en) | 2010-12-07 | 2013-07-02 | Halliburton Energy Services, Inc. | Gas generator for pressurizing downhole samples |
CN102839952B (en) * | 2011-06-24 | 2016-01-27 | 中国石油化工股份有限公司 | A kind of data transmission device for downhole communication and method |
CN102841546B (en) * | 2011-06-24 | 2016-05-25 | 中国石油化工股份有限公司 | A kind of downhole control system, control method and application thereof |
US8757274B2 (en) | 2011-07-01 | 2014-06-24 | Halliburton Energy Services, Inc. | Well tool actuator and isolation valve for use in drilling operations |
US8646537B2 (en) | 2011-07-11 | 2014-02-11 | Halliburton Energy Services, Inc. | Remotely activated downhole apparatus and methods |
US8616276B2 (en) | 2011-07-11 | 2013-12-31 | Halliburton Energy Services, Inc. | Remotely activated downhole apparatus and methods |
CN102306311A (en) * | 2011-08-08 | 2012-01-04 | 北京飞鼎软件技术有限公司 | Radio frequency identification-based apparatus for obtaining parameter of fluid conveyance by pipeline |
US20130048290A1 (en) * | 2011-08-29 | 2013-02-28 | Halliburton Energy Services, Inc. | Injection of fluid into selected ones of multiple zones with well tools selectively responsive to magnetic patterns |
US9151138B2 (en) * | 2011-08-29 | 2015-10-06 | Halliburton Energy Services, Inc. | Injection of fluid into selected ones of multiple zones with well tools selectively responsive to magnetic patterns |
US8522883B2 (en) | 2011-10-04 | 2013-09-03 | Halliburton Energy Services, Inc. | Debris resistant internal tubular testing system |
AU2015200311B2 (en) * | 2011-10-04 | 2015-12-24 | Halliburton Energy Services, Inc. | Debris resistant internal tubular testing system |
GB2496913B (en) | 2011-11-28 | 2018-02-21 | Weatherford Uk Ltd | Torque limiting device |
CN102518395A (en) * | 2011-12-09 | 2012-06-27 | 同济大学 | Self-propelled drilling robot |
US9506324B2 (en) | 2012-04-05 | 2016-11-29 | Halliburton Energy Services, Inc. | Well tools selectively responsive to magnetic patterns |
WO2014011823A1 (en) * | 2012-07-11 | 2014-01-16 | Schlumberger Canada Limited | Communication between downhole tool and surface location |
WO2014021889A1 (en) | 2012-08-01 | 2014-02-06 | Halliburton Energy Services, Inc. | Remote activated deflector |
US9010422B2 (en) | 2012-08-01 | 2015-04-21 | Halliburton Energy Services, Inc. | Remote activated deflector |
US9097813B2 (en) * | 2012-08-23 | 2015-08-04 | Intelligent Spools Inc. | Apparatus and method for sensing a pipe coupler within an oil well structure |
GB2508710B (en) | 2012-10-16 | 2015-05-27 | Petrowell Ltd | Flow control assembly |
US9169705B2 (en) | 2012-10-25 | 2015-10-27 | Halliburton Energy Services, Inc. | Pressure relief-assisted packer |
US9587486B2 (en) | 2013-02-28 | 2017-03-07 | Halliburton Energy Services, Inc. | Method and apparatus for magnetic pulse signature actuation |
US9587487B2 (en) | 2013-03-12 | 2017-03-07 | Halliburton Energy Services, Inc. | Wellbore servicing tools, systems and methods utilizing near-field communication |
US9284817B2 (en) | 2013-03-14 | 2016-03-15 | Halliburton Energy Services, Inc. | Dual magnetic sensor actuation assembly |
NO20130595A1 (en) * | 2013-04-30 | 2014-10-31 | Sensor Developments As | A connectivity system for a permanent borehole system |
US10087725B2 (en) | 2013-04-11 | 2018-10-02 | Weatherford Technology Holdings, Llc | Telemetry operated tools for cementing a liner string |
US9752414B2 (en) | 2013-05-31 | 2017-09-05 | Halliburton Energy Services, Inc. | Wellbore servicing tools, systems and methods utilizing downhole wireless switches |
US20150075770A1 (en) | 2013-05-31 | 2015-03-19 | Michael Linley Fripp | Wireless activation of wellbore tools |
US9482072B2 (en) | 2013-07-23 | 2016-11-01 | Halliburton Energy Services, Inc. | Selective electrical activation of downhole tools |
US9528346B2 (en) | 2013-11-18 | 2016-12-27 | Weatherford Technology Holdings, Llc | Telemetry operated ball release system |
US9428998B2 (en) | 2013-11-18 | 2016-08-30 | Weatherford Technology Holdings, Llc | Telemetry operated setting tool |
US9523258B2 (en) | 2013-11-18 | 2016-12-20 | Weatherford Technology Holdings, Llc | Telemetry operated cementing plug release system |
US9777569B2 (en) | 2013-11-18 | 2017-10-03 | Weatherford Technology Holdings, Llc | Running tool |
US9587444B2 (en) | 2013-12-20 | 2017-03-07 | Weatherford Technology Holdings, Llc | Dampener lubricator for plunger lift system |
US9759040B2 (en) | 2013-12-20 | 2017-09-12 | Weatherford Technology Holdings, Llc | Autonomous selective shifting tool |
DK3097265T3 (en) | 2014-03-24 | 2020-02-17 | Halliburton Energy Services Inc | Well tools having magnetic shielding for magnetic sensor |
US9732597B2 (en) | 2014-07-30 | 2017-08-15 | Weatherford Technology Holdings, Llc | Telemetry operated expandable liner system |
WO2016085465A1 (en) | 2014-11-25 | 2016-06-02 | Halliburton Energy Services, Inc. | Wireless activation of wellbore tools |
US20160298398A1 (en) * | 2015-04-13 | 2016-10-13 | Schlumberger Technology Corporation | Multi-segment instrument line for instrument in drill string |
US10301898B2 (en) | 2015-04-13 | 2019-05-28 | Schlumberger Technology Corporation | Top drive with top entry and line inserted therethrough for data gathering through the drill string |
US10753198B2 (en) | 2015-04-13 | 2020-08-25 | Schlumberger Technology Corporation | Downhole instrument for deep formation imaging deployed within a drill string |
US10900305B2 (en) | 2015-04-13 | 2021-01-26 | Schlumberger Technology Corporation | Instrument line for insertion in a drill string of a drilling system |
WO2018170345A1 (en) | 2017-03-16 | 2018-09-20 | Schlumberger Technology Corporation | System and methodology for controlling fluid flow |
FR3084692B1 (en) * | 2018-08-02 | 2022-01-07 | Vallourec Oil & Gas France | DATA ACQUISITION AND COMMUNICATION DEVICE BETWEEN COLUMNS OF OIL OR GAS WELLS |
US20220259970A1 (en) * | 2019-07-23 | 2022-08-18 | Schlumberger Technology Corporation | Downhole communication devices and systems |
US11028661B2 (en) * | 2019-08-22 | 2021-06-08 | Tri-Lift Services, Inc. | Fishing neck for plunger |
CN111101933B (en) * | 2019-12-18 | 2021-06-25 | 中海石油(中国)有限公司湛江分公司 | Channel self-adaptive drilling communication relay nipple, drill string and frequency self-adaptive regulator |
Family Cites Families (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1033631A (en) | 1951-01-27 | 1953-07-13 | Improvements made to the means for cutting a resistant element along a predetermined line, in particular to those for transversely cutting a metal element | |
US3684008A (en) * | 1970-07-16 | 1972-08-15 | Henry U Garrett | Well bore blocking means and method |
US4023167A (en) * | 1975-06-16 | 1977-05-10 | Wahlstrom Sven E | Radio frequency detection system and method for passive resonance circuits |
GB2062235A (en) | 1979-01-05 | 1981-05-20 | British Gas Corp | Measuring velocity and/or distance travelled |
CA1099088A (en) * | 1979-04-20 | 1981-04-14 | Peter J. Young | Well treating composition and method |
DE3275712D1 (en) * | 1982-12-23 | 1987-04-23 | Ant Nachrichtentech | Automatic information system for mobile objects |
US4827395A (en) * | 1983-04-21 | 1989-05-02 | Intelli-Tech Corporation | Manufacturing monitoring and control systems |
US4656463A (en) * | 1983-04-21 | 1987-04-07 | Intelli-Tech Corporation | LIMIS systems, devices and methods |
US4572293A (en) * | 1984-08-31 | 1986-02-25 | Standard Oil Company (Now Amoco Corporation) | Method of placing magnetic markers on collarless cased wellbores |
US4698631A (en) * | 1986-12-17 | 1987-10-06 | Hughes Tool Company | Surface acoustic wave pipe identification system |
US4808925A (en) * | 1987-11-19 | 1989-02-28 | Halliburton Company | Three magnet casing collar locator |
US5230387A (en) * | 1988-10-28 | 1993-07-27 | Magrange, Inc. | Downhole combination tool |
SU1657627A1 (en) | 1989-07-10 | 1991-06-23 | Всесоюзный научно-исследовательский и проектно-конструкторский институт по взрывным методам геофизической разведки | Shaped charge perforator |
US4964462A (en) | 1989-08-09 | 1990-10-23 | Smith Michael L | Tubing collar position sensing apparatus, and associated methods, for use with a snubbing unit |
US5105742A (en) * | 1990-03-15 | 1992-04-21 | Sumner Cyril R | Fluid sensitive, polarity sensitive safety detonator |
US5142128A (en) * | 1990-05-04 | 1992-08-25 | Perkin Gregg S | Oilfield equipment identification apparatus |
US5191936A (en) * | 1991-04-10 | 1993-03-09 | Schlumberger Technology Corporation | Method and apparatus for controlling a well tool suspended by a cable in a wellbore by selective axial movements of the cable |
US5202680A (en) * | 1991-11-18 | 1993-04-13 | Paul C. Koomey | System for drill string tallying, tracking and service factor measurement |
US5497140A (en) * | 1992-08-12 | 1996-03-05 | Micron Technology, Inc. | Electrically powered postage stamp or mailing or shipping label operative with radio frequency (RF) communication |
US5355957A (en) * | 1992-08-28 | 1994-10-18 | Halliburton Company | Combined pressure testing and selective fired perforating systems |
US5279366A (en) * | 1992-09-01 | 1994-01-18 | Scholes Patrick L | Method for wireline operation depth control in cased wells |
DE69314289T2 (en) * | 1992-12-07 | 1998-01-29 | Akishima Lab Mitsui Zosen Inc | System for measurements during drilling with pressure pulse valve for data transmission |
US5457447A (en) * | 1993-03-31 | 1995-10-10 | Motorola, Inc. | Portable power source and RF tag utilizing same |
US5467083A (en) * | 1993-08-26 | 1995-11-14 | Electric Power Research Institute | Wireless downhole electromagnetic data transmission system and method |
US5505134A (en) * | 1993-09-01 | 1996-04-09 | Schlumberger Technical Corporation | Perforating gun having a plurality of charges including a corresponding plurality of exploding foil or exploding bridgewire initiator apparatus responsive to a pulse of current for simultaneously detonating the plurality of charges |
US5361838A (en) * | 1993-11-01 | 1994-11-08 | Halliburton Company | Slick line casing and tubing joint locator apparatus and associated methods |
US5429190A (en) | 1993-11-01 | 1995-07-04 | Halliburton Company | Slick line casing and tubing joint locator apparatus and associated methods |
GB9408588D0 (en) * | 1994-04-29 | 1994-06-22 | Disys Corp | Passive transponder |
US5479860A (en) * | 1994-06-30 | 1996-01-02 | Western Atlas International, Inc. | Shaped-charge with simultaneous multi-point initiation of explosives |
US5682143A (en) * | 1994-09-09 | 1997-10-28 | International Business Machines Corporation | Radio frequency identification tag |
US5660232A (en) * | 1994-11-08 | 1997-08-26 | Baker Hughes Incorporated | Liner valve with externally mounted perforation charges |
US5608199A (en) * | 1995-02-02 | 1997-03-04 | All Tech Inspection, Inc. | Method and apparatus for tagging objects in harsh environments |
AU697762B2 (en) | 1995-03-03 | 1998-10-15 | Halliburton Company | Locator and setting tool and methods of use thereof |
GB2348029B (en) * | 1995-10-20 | 2001-01-03 | Baker Hughes Inc | Communication in a wellbore utilizing acoustic signals |
US5720345A (en) * | 1996-02-05 | 1998-02-24 | Applied Technologies Associates, Inc. | Casing joint detector |
US5626192A (en) * | 1996-02-20 | 1997-05-06 | Halliburton Energy Services, Inc. | Coiled tubing joint locator and methods |
US5654693A (en) * | 1996-04-10 | 1997-08-05 | X-Cyte, Inc. | Layered structure for a transponder tag |
CA2209958A1 (en) * | 1996-07-15 | 1998-01-15 | James M. Barker | Apparatus for completing a subterranean well and associated methods of using same |
US5829538A (en) * | 1997-03-10 | 1998-11-03 | Owen Oil Tools, Inc. | Full bore gun system and method |
US6426917B1 (en) * | 1997-06-02 | 2002-07-30 | Schlumberger Technology Corporation | Reservoir monitoring through modified casing joint |
US6025780A (en) * | 1997-07-25 | 2000-02-15 | Checkpoint Systems, Inc. | RFID tags which are virtually activated and/or deactivated and apparatus and methods of using same in an electronic security system |
US5911277A (en) * | 1997-09-22 | 1999-06-15 | Schlumberger Technology Corporation | System for activating a perforating device in a well |
US6018501A (en) * | 1997-12-10 | 2000-01-25 | Halliburton Energy Services, Inc. | Subsea repeater and method for use of the same |
JP3473682B2 (en) * | 1998-06-12 | 2003-12-08 | 三菱マテリアル株式会社 | Buried object detection element and detection device using the same |
US6333699B1 (en) * | 1998-08-28 | 2001-12-25 | Marathon Oil Company | Method and apparatus for determining position in a pipe |
US6257338B1 (en) * | 1998-11-02 | 2001-07-10 | Halliburton Energy Services, Inc. | Method and apparatus for controlling fluid flow within wellbore with selectively set and unset packer assembly |
US6151961A (en) * | 1999-03-08 | 2000-11-28 | Schlumberger Technology Corporation | Downhole depth correlation |
US6536524B1 (en) * | 1999-04-27 | 2003-03-25 | Marathon Oil Company | Method and system for performing a casing conveyed perforating process and other operations in wells |
US6343649B1 (en) * | 1999-09-07 | 2002-02-05 | Halliburton Energy Services, Inc. | Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
US6333700B1 (en) * | 2000-03-28 | 2001-12-25 | Schlumberger Technology Corporation | Apparatus and method for downhole well equipment and process management, identification, and actuation |
US6989764B2 (en) * | 2000-03-28 | 2006-01-24 | Schlumberger Technology Corporation | Apparatus and method for downhole well equipment and process management, identification, and actuation |
US6577244B1 (en) * | 2000-05-22 | 2003-06-10 | Schlumberger Technology Corporation | Method and apparatus for downhole signal communication and measurement through a metal tubular |
-
2003
- 2003-12-01 US US10/726,027 patent/US7063148B2/en not_active Expired - Lifetime
-
2004
- 2004-11-30 WO PCT/US2004/040047 patent/WO2005054876A2/en not_active Application Discontinuation
- 2004-11-30 EP EP04812543.9A patent/EP1689975B1/en not_active Expired - Fee Related
- 2004-11-30 CA CA002546695A patent/CA2546695C/en active Active
-
2006
- 2006-06-30 NO NO20063054A patent/NO338561B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
WO2005054876A2 (en) | 2005-06-16 |
NO20063054L (en) | 2006-06-30 |
EP1689975B1 (en) | 2013-06-26 |
EP1689975A2 (en) | 2006-08-16 |
NO338561B1 (en) | 2016-09-05 |
WO2005054876A3 (en) | 2005-11-10 |
US20050115708A1 (en) | 2005-06-02 |
CA2546695C (en) | 2009-01-20 |
EP1689975A4 (en) | 2011-09-07 |
US7063148B2 (en) | 2006-06-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2546695A1 (en) | Method and system for transmitting signals through a metal tubular | |
EP1840595A3 (en) | On-vehicle radar device and on-vehicle radar device control system | |
WO2006047538A3 (en) | Method and system for monitoring a vehicle | |
AU2002216948A1 (en) | Method ans system for transmission of signals to nodes in a system | |
AU2002337591A1 (en) | System and method for controlling a device in vivo | |
WO2002098271A3 (en) | Birth monitoring system | |
SG130093A1 (en) | Radar detection apparatus and method thereof | |
WO2004017087A3 (en) | System and method for near-field electromagnetic ranging | |
WO2006115953A3 (en) | Real-time multistatic radar signal processing system and method | |
TW200737868A (en) | Method and device for controlling a signal receiver | |
WO2005017846A3 (en) | Improved security device, system, and method | |
WO2003012760A3 (en) | System and method for monitoring a pressurized system | |
WO2002096725A3 (en) | Vehicle security system | |
WO2006041738A3 (en) | Biological interface system | |
HK1149976A1 (en) | Method and system for switching monitoring units of an electronic location monitoring system | |
WO2007149668A3 (en) | Methods, apparatus, and systems for monitoring transmission systems | |
EP1587269A3 (en) | Communication apparatus | |
HUT70796A (en) | Electronic control apparatus, method and device, especially for contactless control of sanitary equipments | |
EP1278075A3 (en) | Vehicle control apparatus with obstruction detection unit | |
AU2676900A (en) | Method and device for monitoring an electronic or computer system by means of a fluid flow | |
AU2002217075A1 (en) | Interference measurements in a wireless communications system | |
WO2004010394A3 (en) | Improvements relating to security and electronic article surveillance | |
WO2008093088A3 (en) | A system for detection of underwater objects | |
WO2004075453A3 (en) | System comprising controlled-supply communication module, radio communication assembly, methods and readers | |
EP1522981A3 (en) | Monitoring device and system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request |