| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 03/10/2003 | CA2577579A1 Methods and apparatus for measuring flow velocity in a wellbore using nmr and applications using same |
| 03/10/2003 | CA2577578A1 Methods and apparatus for measuring flow velocity in a wellbore using nmr and applications using same |
| 03/06/2003 | WO2003018709A1 Electrically conductive oil-based mud |
| 03/06/2003 | WO2002068797B1 Oscillating shear valve for mud pulse telemetry |
| 03/06/2003 | WO2002057805B1 Method and system for monitoring smart structures utilizing distributed optical sensors |
| 03/06/2003 | WO2002050400A3 Method for determining magnetometer errors during wellbore surveying |
| 03/06/2003 | WO2002038915A3 Adaptive filter prediction method and system for detecting drill bit failure and signaling surface operator |
| 03/06/2003 | US20030046005 Method of assessing positional uncertainty in drilling a well |
| 03/06/2003 | US20030043694 Frequency regulation of an oscillator for use in MWD transmission |
| 03/06/2003 | US20030043055 Self-contained downhole sensor and method of placing and interrogating same |
| 03/06/2003 | US20030042897 Sucker rod dimension measurement and flaw detection system |
| 03/06/2003 | US20030042025 Light-intervention subsea tree system |
| 03/06/2003 | US20030042020 Method of monitoring pumping operations of a service vehicle at a well site |
| 03/06/2003 | US20030042019 Method and apparatus for determining the temperature of subterranean wells using fiber optic cable |
| 03/06/2003 | US20030042016 Wireless communication using well casing |
| 03/06/2003 | US20030041662 Method of accurately gauging groundwater and nonaqueous phase liquid contaminants which eliminates cross contamination between wells |
| 03/06/2003 | US20030041661 Inertially-stabilized magnetometer measuring apparatus for use in a borehole rotary environment |
| 03/06/2003 | CA2456351A1 Electrically conductive oil-based mud |
| 03/05/2003 | EP1287230A2 Method and system for performing operations and for improving production in wells |
| 03/05/2003 | EP1287227A1 Downhole window finder and method of using the same |
| 03/05/2003 | CN2538961Y Multi-parameter dynamic layered tester |
| 03/05/2003 | CN1102742C Transducer for soniclogging, transmitter, logging apparatus and method |
| 03/04/2003 | US6529834 Measurement-while-drilling assembly using gyroscopic devices and methods of bias removal |
| 03/04/2003 | US6527512 Mud motor |
| 03/04/2003 | US6526819 Method for analyzing a completion system |
| 03/04/2003 | US6526818 Seabed analysis |
| 02/27/2003 | WO2003016677A1 Measurement of curvature of a subsurface borehole, and use of such measurement in directional drilling |
| 02/27/2003 | WO2003016673A1 Tool for replaceable pressure and temperature sensor |
| 02/27/2003 | WO2003006778A8 Drilling system and method for controlling equivalent circulating density during drilling of wellbores |
| 02/27/2003 | US20030038231 Non-intrusive fiber optic pressure sensor for measuring unsteady pressure within a pipe |
| 02/27/2003 | US20030037963 Measurement of curvature of a subsurface borehole, and use of such measurement in directional drilling |
| 02/26/2003 | EP1285148A1 Tracer release method for monitoring fluid flow in a well |
| 02/26/2003 | EP0792407B1 Single-wire guidance system for drilling boreholes |
| 02/26/2003 | EP0712499B1 Improved slick line system with real-time surface display |
| 02/26/2003 | CN2537815Y Small well bore measuring tool |
| 02/25/2003 | US6525538 Position and orientation locator/monitor |
| 02/25/2003 | US6523609 Borehole pressure gauge |
| 02/20/2003 | WO2003014526A1 Dual sensor freepoint tool |
| 02/20/2003 | WO2003014525A1 Motion sensor for noise cancellation in borehole electromagnetic telemetry system |
| 02/20/2003 | WO2003013875A1 Contingent convertible financial instruments |
| 02/20/2003 | WO2003002951A3 Method and installation for locating the position of the boundary formed at the interface between two fluids contained in a reservoir |
| 02/20/2003 | WO2002070857B1 Improved mud motor |
| 02/20/2003 | WO2002046563A3 Method and device for determining the quality of an oil well reserve |
| 02/20/2003 | US20030034161 Pump control method and apparatus |
| 02/19/2003 | EP1283940A1 Hydraulically operated fluid metering apparatus for use in a subterranean well |
| 02/19/2003 | CN2536788Y Well logging positioner |
| 02/19/2003 | CN1398319A Combined logging and drilling system |
| 02/18/2003 | US6522119 Power source regulator for wireline cable system |
| 02/18/2003 | CA2250769C Downhole electrode for well guidance system |
| 02/13/2003 | WO2001073400A9 Method and apparatus for determining fluid viscosity |
| 02/13/2003 | US20030029641 Method and system for drilling a wellbore having cable based telemetry |
| 02/13/2003 | US20030029611 System and method for actuating a subterranean valve to terminate a reverse cementing operation |
| 02/13/2003 | US20030029241 Self-calibrated ultrasonic method of in-situ measurement of borehole fluid acoustic properties |
| 02/12/2003 | EP1282760A1 A method of conducting in situ measurements of properties of a reservoir fluid |
| 02/12/2003 | CN2535560Y Conic lead mould |
| 02/12/2003 | CN2535559Y Locking type shrink-fit pressure controlling tester |
| 02/11/2003 | US6518756 Systems and methods for determining motion tool parameters in borehole logging |
| 02/11/2003 | US6516899 Method and apparatus for directional boring under mixed conditions |
| 02/11/2003 | US6516898 Continuous wellbore drilling system with stationary sensor measurements |
| 02/11/2003 | US6516879 Liquid level detection for artificial lift system control |
| 02/11/2003 | US6516663 Downhole electromagnetic logging into place tool |
| 02/06/2003 | WO2003010534A2 Method for quantitative monitoring of a gas injected into a reservoir in particular in a natural environment |
| 02/06/2003 | US20030026169 Adaptive acoustic transmitter controller apparatus and method |
| 02/06/2003 | US20030026167 System and methods for detecting pressure signals generated by a downhole actuator |
| 02/06/2003 | US20030024739 Method and apparatus for directional boring under mixed conditions |
| 02/06/2003 | US20030024704 Use of downhole high pressure gas in a gas-lift well |
| 02/06/2003 | US20030024702 Dual sensor freepoint tool |
| 02/05/2003 | EP1280977A2 Measuring device for detecting a body moving in relation to a tubular container |
| 02/05/2003 | EP1280976A2 Instrumented cementing plug and system |
| 02/05/2003 | CN2534370Y Apparatus for measuring oil pressure for rod-pumped well |
| 02/04/2003 | USRE37975 Directional boring head with blade assembly |
| 02/04/2003 | US6515592 Power and signal transmission using insulated conduit for permanent downhole installations |
| 02/04/2003 | US6513596 Non-intrusive pressure measurement device for subsea well casing annuli |
| 02/04/2003 | US6513591 Leak detection method |
| 02/04/2003 | CA2291545C Method and apparatus for use in creating a magnetic declination profile for a borehole |
| 01/30/2003 | US20030023381 Virtual steering of induction tool attenuation and phase difference measurements |
| 01/30/2003 | US20030020631 Hybrid well communication system |
| 01/29/2003 | EP1279794A1 Use of virtual sensors for controlling electrical submersible pumps |
| 01/29/2003 | EP1279006A1 Sensor apparatus with two resonant transducers and a single conductor |
| 01/28/2003 | US6510898 Positioning assembly |
| 01/23/2003 | WO2003007020A1 Improved data telemetry system for multi-conductor wirelines |
| 01/23/2003 | WO2003006779A2 Method and apparatus to monitor, control and log subsea oil and gas wells |
| 01/23/2003 | WO2003006778A1 Drilling system and method for controlling equivalent circulating density during drilling of wellbores |
| 01/23/2003 | US20030016164 Downlink telemetry system |
| 01/23/2003 | US20030015320 Virtual sensors to provide expanded downhole instrumentation for electrical submersible pumps (ESPs) |
| 01/23/2003 | US20030015319 Method and apparatus for improved communication in a wellbore utilizing acoustic signals |
| 01/23/2003 | US20030014873 Method to detect deviations from a wellplan while drilling in the presence of magnetic interference |
| 01/22/2003 | EP1277069A1 Probe for detecting the structure of a dielectric medium |
| 01/22/2003 | EP1277051A1 Reservoir monitoring |
| 01/22/2003 | EP1276968A1 Logging sondes for use in boreholes |
| 01/21/2003 | US6510105 Obtaining an image of an underground formation |
| 01/21/2003 | US6508316 Apparatus to measure the earth's local gravity and magnetic field in conjunction with global positioning attitude determination |
| 01/16/2003 | WO2003004825A1 Well drilling bit |
| 01/16/2003 | WO2002025319A3 Methods and apparatus for interactive communications |
| 01/16/2003 | US20030014183 Data acquisition system |
| 01/16/2003 | US20030011490 Data telemetry system for multi-conductor wirelines |
| 01/16/2003 | US20030011370 Flux orientation locating in a drilling system |
| 01/16/2003 | US20030010500 Method and apparatus to monitor, control and log subsea oil and gas wells |
| 01/16/2003 | US20030010495 System and methods for detecting casing collars |
| 01/16/2003 | US20030010493 Downhole telemetry and control system |