| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
|---|
| 05/07/2002 | CA2085563C Fixed-installation underground pool active and/or passive monitoring system |
| 05/02/2002 | WO2002035059A1 Fluid property sensors and associated methods of calibrating sensors in a subterranean well |
| 05/02/2002 | WO2002035048A1 Solid-state inertial navigation control system for a horizontal drilling machine |
| 05/02/2002 | WO2000054009A9 Downhole depth correlation |
| 05/02/2002 | US20020050930 Apparatus and method for downhole well equipment and process management, identification, and operation |
| 05/02/2002 | US20020050359 Drilling method |
| 05/02/2002 | EP1201875A2 Downhole tool |
| 05/02/2002 | EP1200806A1 Measurement of propagating acoustic waves in compliant pipes |
| 05/02/2002 | EP1200709A1 Method for determining a fluid contact level in a formation |
| 05/02/2002 | EP1200708A2 Apparatus for optimizing production of multi-phase fluid |
| 05/02/2002 | EP0767863B1 Downhole data transmission |
| 05/01/2002 | CN1346929A Monitor system for drilling procedure |
| 04/30/2002 | US6378627 Autonomous downhole oilfield tool |
| 04/30/2002 | US6378610 Communicating with devices positioned outside a liner in a wellbore |
| 04/30/2002 | US6378364 Downhole densitometer |
| 04/25/2002 | US20020046836 Method and apparatuses for logging hydrocarbon reservoirs |
| 04/24/2002 | EP1198657A1 Core orientation |
| 04/24/2002 | EP1198655A1 Continuous wellbore drilling system with stationary sensor measurements |
| 04/24/2002 | CN2487871Y Analogue experiment device for oil gas migration and accumulation |
| 04/24/2002 | CN2487870Y Analogue experiment device for compacting diagenesis and oil gas generating and expulsion |
| 04/24/2002 | CN2487869Y Analogue Experiment device for 2-D oil gas migration and accumulation |
| 04/24/2002 | CN1346555A Method and apparatus for determining position in pipe |
| 04/24/2002 | CN1083523C Method and apparatus for drilling and re-entering multiple lateral branches in well |
| 04/23/2002 | US6377189 Oil well servicing system |
| 04/23/2002 | US6374926 Method of assaying downhole occurrences and conditions |
| 04/23/2002 | US6374913 Sensor array suitable for long term placement inside wellbore casing |
| 04/23/2002 | US6374669 Water influx identification |
| 04/23/2002 | CA2082874C Metering and acting device for drilling, mounting process and use in a well |
| 04/18/2002 | WO2002014644A3 Method and device for introducing tools or instruments into earth formations |
| 04/18/2002 | US20020043408 Drill bit for directional drilling |
| 04/18/2002 | US20020043406 Method and apparatus for directional boring under mixed conditions |
| 04/18/2002 | US20020043404 Erectable arm assembly for use in boreholes |
| 04/18/2002 | US20020043369 Petroleum well having downhole sensors, communication and power |
| 04/17/2002 | EP1197011A1 Power line communication system |
| 04/17/2002 | EP1196743A1 Method and apparatus for determining flow rates |
| 04/17/2002 | EP0792408A4 Downhole system for extending the life span of electronic components |
| 04/16/2002 | US6371223 Drill head for directional boring |
| 04/16/2002 | US6371204 Underground well kick detector |
| 04/16/2002 | US6370784 Tiltmeter leveling mechanism |
| 04/16/2002 | CA2062472C Method and device for placing probes against the walls for cased well |
| 04/11/2002 | WO2002030011A1 Multiplexed distribution of optical power |
| 04/11/2002 | WO2002029441A1 Method and apparatus for transmitting information to the surface from a drill string down hole in a well |
| 04/11/2002 | WO2002029195A2 Production optimization for multilayer commingled reservoirs |
| 04/11/2002 | WO2000052294A9 Drill head for directional boring |
| 04/11/2002 | US20020040963 Sensing strain in hydrocarbon wells |
| 04/11/2002 | US20020040783 Subsea intervention system |
| 04/11/2002 | US20020040782 Subsea intervention |
| 04/10/2002 | EP1194792A1 Propagating wave earth formation resistivity measuring arrangement |
| 04/10/2002 | EP1194678A1 Data transmission in pipeline systems |
| 04/10/2002 | EP0918919B1 Logging method |
| 04/09/2002 | US6370082 Acoustic telemetry system with drilling noise cancellation |
| 04/09/2002 | US6369718 Oil well monitoring and control system communication network |
| 04/09/2002 | US6368068 Multi-well computerized control of fluid pumping |
| 04/09/2002 | US6367545 Electronically controlled electric wireline setting tool |
| 04/09/2002 | US6367323 Dynamic pressure device for oil drill systems |
| 04/04/2002 | WO2002027139A1 Method and system for wireless communications for downhole applications |
| 04/04/2002 | US20020039465 Multiplexed distribution of optical power |
| 04/04/2002 | US20020039328 Resonant acoustic transmitter apparatus and method for signal transmission |
| 04/04/2002 | US20020038849 Method and apparatus for safely operating radiation generators in while-drilling and while-tripping applications |
| 04/04/2002 | DE10044594A1 Method for energizing and retrieving data from deep bore holes uses radio transmission through the wall of the boring column |
| 04/03/2002 | EP1193368A2 Resonant acoustic transmitter apparatus and method for signal transmission |
| 04/03/2002 | EP1192715A2 Opto-electrical actuation system and method |
| 04/03/2002 | EP1192482A1 Digital signal receiver for measurement while drilling system having noise cancellation |
| 04/03/2002 | EP0916101A4 Combined electric-field telemetry and formation evaluation method and apparatus |
| 04/03/2002 | CN1082128C Method of assaying work of waderground bit |
| 04/02/2002 | US6364035 Establishing positions of locating field detectors and path mapping in underground boring tool applications |
| 04/02/2002 | US6364021 Well management system and method of operation |
| 04/02/2002 | US6364014 Flow monitoring and control in multi-lateral wellbores |
| 04/02/2002 | CA2067546C Process and device for optimizing transmission flow of signals on multifunction well cables |
| 03/28/2002 | WO2002025319A2 Methods and apparatus for interactive communications |
| 03/28/2002 | WO2002025062A1 Method for determining pressure profiles in wellbores, flowlines and pipelines, and use of such method |
| 03/28/2002 | WO2001065718A3 Wireless power and communications cross-bar switch |
| 03/28/2002 | WO2000054028A9 System and method for monitoring corrosion in oilfield wells and pipelines utilizing time-domain-reflectometry |
| 03/28/2002 | US20020036102 Method and rock drilling apparatus for controlling rock drilling |
| 03/28/2002 | US20020036085 Toroidal choke inductor for wireless communication and control |
| 03/28/2002 | CA2423586A1 Methods and apparatus for interactive communications |
| 03/27/2002 | EP0873465B1 Trenchless underground boring system with boring tool location |
| 03/26/2002 | US6361299 Composite spoolable tube with sensor |
| 03/26/2002 | US6360823 Apparatus and method for performing downhole measurements |
| 03/26/2002 | US6360820 Method and apparatus for communicating with downhole devices in a wellbore |
| 03/26/2002 | CA2212925C Method to determine local variations of the earth's magnetic field and location of the source thereof |
| 03/26/2002 | CA2204946C Apparatus and method for actively cooling instrumentation in a high temperature environment |
| 03/21/2002 | WO2002023169A1 Apparatus for acoustic detection of particles in a flow using a fibre optic interferometer |
| 03/21/2002 | WO2002023010A1 Real-time reservoir fracturing process |
| 03/21/2002 | US20020033043 Multiphase flow measurement system |
| 03/20/2002 | EP1188265A1 Method and apparatus for determining position in a pipe |
| 03/20/2002 | CN2482584Y Support arm independent logging instrument |
| 03/20/2002 | CN1081285C Inspection system of oil extracting equipment working state |
| 03/19/2002 | US6359569 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 03/19/2002 | US6357523 Drainage pattern with intersecting wells drilled from surface |
| 03/19/2002 | CA2214786C Flow meter |
| 03/16/2002 | CA2357216A1 Method and apparatuses for logging hydrocarbon reservoirs |
| 03/14/2002 | WO2002021118A1 Method and apparatus for acoustic fluid analysis |
| 03/14/2002 | WO2002020942A1 Hydraulic control system for downhole tools |
| 03/14/2002 | WO2002020939A1 Method and system for perforating |
| 03/14/2002 | WO2001071149A3 Drill bit stabilizer and method of use |
| 03/14/2002 | US20020032529 Remote sensing and measurement of distances along a borehole |
| 03/14/2002 | US20020029889 Deviated borehole drilling assembly |
| 03/14/2002 | US20020029883 System and method for fluid flow optimization |
| 03/14/2002 | DE10041145A1 Drillhead or string positions and deviation are found by laser pathmeter with polarisation filter and prisms for monitored display for command formulation. |