| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 06/20/2002 | WO2002049233A1 Coupling signals to flowlines |
| 06/20/2002 | WO2002048499A2 Method and apparatus for measuring mud and formation properties downhole |
| 06/20/2002 | US20020075114 Data transmission system for a string of downhole components |
| 06/20/2002 | US20020074165 Drilling process monitor |
| 06/20/2002 | US20020074127 Artificial lift apparatus with automated monitoring characteristics |
| 06/20/2002 | CA2432004A1 Coupling signals to flowlines |
| 06/19/2002 | EP1214501A2 Apparatus and method for measuring depth |
| 06/18/2002 | US6405809 Conductive medium for openhold logging and logging while drilling |
| 06/18/2002 | US6405808 Method for increasing the efficiency of drilling a wellbore, improving the accuracy of its borehole trajectory and reducing the corresponding computed ellise of uncertainty |
| 06/18/2002 | US6405795 Subsurface signal transmitting apparatus |
| 06/13/2002 | WO2002046563A2 Method and device for determining the quality of an oil well reserve |
| 06/13/2002 | WO2002029195A3 Production optimization for multilayer commingled reservoirs |
| 06/13/2002 | WO2001004459A9 Downhole anchoring tools conveyed by non-rigid carriers |
| 06/13/2002 | US20020070368 Hydraulic system for actuation of a measurement-while-drilling mud valve |
| 06/13/2002 | US20020070337 Scale monitor |
| 06/13/2002 | US20020070026 Light-intervention subsea tree system |
| 06/12/2002 | EP1213440A1 Method for transmitting information along a drill string |
| 06/12/2002 | EP1212515A2 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 06/12/2002 | EP1212514A2 System for enhancing fluid flow in a well |
| 06/11/2002 | US6401840 Method of extracting and testing a core from a subterranean formation |
| 06/11/2002 | US6401838 Method for detecting stuck pipe or poor hole cleaning |
| 06/11/2002 | US6401814 Method of locating a cementing plug in a subterranean wall |
| 06/11/2002 | US6401812 Method and apparatus for multilateral well entry |
| 06/11/2002 | US6401538 Method and apparatus for acoustic fluid analysis |
| 06/06/2002 | WO2002044760A2 Rib-mounted logging-while-drilling (lwd) sensors |
| 06/06/2002 | WO2002044523A1 Apparatus for protecting sensors within a well environment |
| 06/06/2002 | WO2001092675A3 Method and system for performing operations and for improving production in wells |
| 06/06/2002 | US20020066856 Fluid density monitor |
| 06/06/2002 | US20020066577 Well reference apparatus and method |
| 06/06/2002 | US20020066575 Downhole communication method and apparatus |
| 06/06/2002 | US20020066561 Controlling Production |
| 06/06/2002 | US20020066556 Well having a self-contained inter vention system |
| 06/06/2002 | US20020066309 Monitoring of downhole parameters and tools utilizing fiber optics |
| 06/06/2002 | DE10109639C1 Geoelectric measuring electrodes for borehole or fissure made of flexible, expandable conductive material pressed into contact with borehole or fissure walls via pressure devices |
| 06/06/2002 | DE10059860C1 Coupling, for borehole measurement unit, in a drilling pipe, has a lower coupling pin which sits in an opening at a chamber together with a damper mechanism to prevent high frequency oscillations |
| 06/05/2002 | EP0865612B1 Use of acoustic emission in rock formation analysis |
| 06/05/2002 | CN2494430Y Through-tubing well diameter lantern body type testing device |
| 06/05/2002 | CN2494429Y Pressure-reduced drive device for automatic sidewall contact combined apparatus |
| 06/04/2002 | US6400646 Method for compensating for remote clock offset |
| 05/30/2002 | WO2002042605A1 Method of and system for controlling directional drilling |
| 05/30/2002 | US20020062992 Rib-mounted logging-while-drilling (LWD) sensors |
| 05/30/2002 | US20020062991 Communicating with a tool |
| 05/30/2002 | US20020062958 Apparatus for protecting sensors within a well environment |
| 05/30/2002 | US20020062860 Method for storing and transporting crude oil |
| 05/29/2002 | CN1085772C Parameters design method for mechanically oil producing technology with rod pump |
| 05/28/2002 | US6396415 Method and system of communicating in a subterranean well |
| 05/28/2002 | US6396276 Apparatus and method for electric field telemetry employing component upper and lower housings in a well pipestring |
| 05/28/2002 | US6396275 Arrangement using measured pitch and locating field measurements to determine a positional relationship |
| 05/28/2002 | US6393906 Method to evaluate the hydrocarbon potential of sedimentary basins from fluid inclusions |
| 05/28/2002 | CA2209918C Method of monitoring fluids entering a wellbore |
| 05/23/2002 | WO2001066900A3 Method and apparatus for directional boring under mixed conditions |
| 05/23/2002 | WO2001040771A9 Apparatus and method for analyzing fluids |
| 05/23/2002 | US20020060570 Borehole survey method utilizing continuous measurements |
| 05/23/2002 | US20020060095 Drill bit for directional drilling |
| 05/23/2002 | US20020060066 Memory gravel pack imaging apparatus and method |
| 05/23/2002 | US20020059734 Borehole survey method and apparatus |
| 05/22/2002 | EP1114334A4 Method and apparatus for creating an image of an earth borehole or a well casing |
| 05/21/2002 | US6393364 Determination of conductivity in anisotropic dipping formations from magnetic coupling measurements |
| 05/21/2002 | US6392561 Short hop telemetry system and method |
| 05/21/2002 | US6390207 Method and apparatus for directional boring under mixed conditions |
| 05/21/2002 | US6390194 Method and apparatus for multi-diameter testing of blowout preventer assemblies |
| 05/21/2002 | US6390193 Downhole connector for production tubing and control line and method |
| 05/21/2002 | US6390087 Drill bit for directional drilling |
| 05/21/2002 | US6389905 Method and apparatus for monitoring the compaction of a fill |
| 05/21/2002 | CA2045927C Advanced activation and measurement device used during production of non eruptive wells |
| 05/16/2002 | WO2002039143A2 Method and apparatus for lwd shear velocity measurement |
| 05/16/2002 | WO2002038916A2 An apparatus and method for determining downhole bit failure |
| 05/16/2002 | WO2002038915A2 Adaptive filter prediction method and system for detecting drill bit failure and signaling surface operator |
| 05/16/2002 | WO2002038914A2 System and method for signalling downhole conditions to surface |
| 05/16/2002 | WO2002038909A2 Mean strain ratio analysis method and system for detecting drill bit failure and signaling surface operator |
| 05/16/2002 | WO2002038908A2 Differential sensor measurements to detect drill bit failure |
| 05/16/2002 | WO2001098618A3 Burst qam downhole telemetry system |
| 05/16/2002 | US20020059048 Method of load and failure prediction of downhole liners and wellbores |
| 05/16/2002 | US20020057211 Remote actuation of downhole tools using vibration |
| 05/16/2002 | US20020057210 Modified tubular equipped with a tilted or transverse magnetic dipole for downhole logging |
| 05/16/2002 | US20020056574 Stabilizer for use in a drill string |
| 05/16/2002 | US20020056201 Method for drilling under rivers and other obstacles |
| 05/15/2002 | EP1205632A2 Method of locating a cementing plug in a subterranean well |
| 05/15/2002 | EP1205631A1 Method for determining the thermal profile of drilling fluid |
| 05/15/2002 | CN1349037A Apparatus and method for placing data testing device into under-ground rock stratum |
| 05/14/2002 | US6389360 Automated bore planning method and apparatus for horizontal directional drilling |
| 05/14/2002 | US6388577 High impact communication and control system |
| 05/14/2002 | US6388251 Optical probe for analysis of formation fluids |
| 05/14/2002 | US6386322 Method and apparatus for oil well pumping |
| 05/14/2002 | US6386287 Deviated borehole drilling assembly |
| 05/14/2002 | US6386285 Flow identification system |
| 05/14/2002 | CA2044330C Advanced method and device for enhancing production loggings of an activated noneruptive well |
| 05/10/2002 | WO2002037072A2 Apparatus and method for formation testing while drilling using combined absolute and differential pressure measurement |
| 05/10/2002 | WO2002037052A1 Use of magneto-resistive sensors for borehole logging |
| 05/10/2002 | WO2002036936A1 Flow controller with downhole pumping system |
| 05/10/2002 | CA2396764A1 Use of magneto-resistive sensors for borehole logging |
| 05/09/2002 | US20020053608 Portable locator including a ground marking arrangement |
| 05/09/2002 | US20020053471 Intergrated transmitter surveying while boring entrenching powering device for the continuation of a guided bore hole |
| 05/09/2002 | US20020053434 Downhole anchoring tools conveyed by non-rigid carriers |
| 05/08/2002 | EP1203942A1 Methods and apparatus for optically measuring fluid compressibility downhole |
| 05/08/2002 | EP0885345B1 High pressure tree cap |
| 05/08/2002 | DE10064187C1 Diameter measuring device for ground foundation or wall element has measuring element provided by rod-shaped profile with 2 concave strips pressed together for switching from flexible state to rigid state |
| 05/07/2002 | US6384738 Pressure impulse telemetry apparatus and method |
| 05/07/2002 | US6382332 Drill bit apparatus for receiving seismic sound signals |
| 05/07/2002 | US6381858 Method for calculating gyroscopic wellbore surveys including correction for unexpected instrument movement |