| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 09/17/2002 | US6450022 Apparatus for measuring forces on well logging instruments |
| 09/17/2002 | CA2254792C Process and devices for characterising ground water measurement points by distinguishing ground water from subterranean water accumulation |
| 09/17/2002 | CA2214755C Core drilling latch assembly |
| 09/12/2002 | WO2002071178A2 Improved bandwidth wireline data transmission system and method |
| 09/12/2002 | WO2002070863A1 Apparatus and method for sensing the profile and position of a well component in a well bore |
| 09/12/2002 | WO2002070857A1 Improved mud motor |
| 09/12/2002 | WO2002055832A3 Conductive medium for openhole logging and logging while drilling |
| 09/12/2002 | WO2001011189A9 Apparatus for optimizing production of multi-phase fluid |
| 09/12/2002 | US20020126021 Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters |
| 09/12/2002 | US20020125009 Intelligent well system and method |
| 09/12/2002 | US20020125008 Intelligent well system and method |
| 09/12/2002 | US20020124652 Spectral power ratio method and system for detecting drill bit failure and signaling surface operator |
| 09/12/2002 | US20020124640 Apparatus and method for measuring forces on well logging instruments |
| 09/11/2002 | EP1238483A2 Method for compensating for remote clock offset |
| 09/11/2002 | EP0973997B1 Method and apparatus for the downhole compositional analysis of formation gases |
| 09/11/2002 | EP0708872B1 Method and apparatus for controlling the head of a drilling or core-drilling device |
| 09/10/2002 | US6446728 Auto-extending/retracting electrically isolated conductors in a segmented drill string |
| 09/06/2002 | WO2002068797A2 Oscillating shear valve for mud pulse telemetry |
| 09/06/2002 | WO2002068796A1 Borehole shape determination |
| 09/06/2002 | WO2002038916A3 An apparatus and method for determining downhole bit failure |
| 09/05/2002 | US20020122722 Mud motor |
| 09/05/2002 | US20020121373 System for pressure testing tubing |
| 09/05/2002 | US20020121371 Fluid property sensors and associated methods of calibrating sensors in a subterranean well |
| 09/05/2002 | US20020121369 Apparatus and method for sensing the profile and position of a well component in a well bore |
| 09/05/2002 | US20020121366 Induction choke for power distribution in piping structure |
| 09/04/2002 | CN1367858A Method for determining fluid contact level in formation |
| 09/03/2002 | US6445307 Drill string telemetry |
| 09/03/2002 | US6443228 Method of utilizing flowable devices in wellbores |
| 09/03/2002 | US6443227 Azimuth control of hydraulic vertical fractures in unconsolidated and weakly cemented soils and sediments |
| 09/03/2002 | US6443226 Apparatus for protecting sensors within a well environment |
| 08/29/2002 | WO2002066921A2 Tubing elongation correction system and methods |
| 08/29/2002 | WO2002066791A1 Downhole sensing and flow control utilizing neural networks |
| 08/29/2002 | WO2002066784A1 Method for magnetizing wellbore tubulars |
| 08/29/2002 | WO2002066782A1 Apparatus for transmission of data and power in a wellbore |
| 08/29/2002 | WO2002008570A8 Drawdown apparatus and method for in-situ analysis of formation fluids |
| 08/29/2002 | WO2001098618A8 Burst qam downhole telemetry system |
| 08/29/2002 | US20020119271 Composite spoolable tube with sensor |
| 08/29/2002 | US20020117306 Oscillating shear valve for mud pulse telemetry |
| 08/29/2002 | US20020117300 Drillpipe assembly and a method of deploying a logging tool |
| 08/29/2002 | DE10106080A1 Borlochmeßgerät für Tiefbohrungen mit einer Einrichtung zum Übertragen von Bohrlochmeßdaten Borlochmeßgerät for deep drilling with a means for transmitting Bohrlochmeßdaten |
| 08/28/2002 | EP1234102A1 Flow identification system |
| 08/28/2002 | EP1234101A1 Leak detection method |
| 08/28/2002 | EP1234091A1 Downhole device |
| 08/28/2002 | EP1015728A4 Bottomhole assembly orienting sub |
| 08/28/2002 | CN1366574A Method and device for measuring physical parameter in production shaft of deposit of underground fluid storage reservoir |
| 08/27/2002 | US6442304 Apparatus and method for protecting devices, especially fibre optic devices, in hostile environments |
| 08/27/2002 | US6442105 Acoustic transmission system |
| 08/27/2002 | US6441618 Method and apparatus for monitoring the advance of seawater into fresh water aquifers near coastal cities |
| 08/27/2002 | US6439320 Wellbore pattern for uniform access to subterranean deposits |
| 08/27/2002 | US6439319 Method and apparatus for directional boring under mixed conditions |
| 08/27/2002 | US6439310 Real-time reservoir fracturing process |
| 08/27/2002 | US6439046 Apparatus and method for synchronized formation measurement |
| 08/22/2002 | WO2002065158A1 Downlink telemetry system |
| 08/22/2002 | US20020116130 Lockable motor drive |
| 08/22/2002 | US20020116129 Automated bore planning method and apparatus for horizontal directional drilling |
| 08/22/2002 | US20020114216 Method and apparatus for communications in a wellbore |
| 08/22/2002 | US20020113718 Burst QAM downhole telemetry system |
| 08/22/2002 | US20020113717 Method and apparatus for LWD shear velocity measurement |
| 08/22/2002 | US20020113716 Hollow drlling rod for transmitting information |
| 08/22/2002 | US20020112860 Apparatus and method for electrically controlling multiple downhole devices |
| 08/22/2002 | US20020112857 Method and apparatus for providing plural flow paths at a lateral junction |
| 08/22/2002 | US20020112856 Method for magnetizing wellbore tubulars |
| 08/22/2002 | US20020112854 Closed-loop drawdown apparatus and method for in-situ analysis of formation fluids |
| 08/22/2002 | CA2802235A1 Downlink telemetry system |
| 08/22/2002 | CA2691720A1 Downlink telemetry system |
| 08/21/2002 | EP1062529B1 Clamped receiver array using coiled tubing conveyed packer elements |
| 08/21/2002 | CN1365552A Method and apparatus for data communication with an underground instrument package |
| 08/21/2002 | CN1089400C Whole three-dimensional resistivity logging method |
| 08/20/2002 | US6438495 Method for predicting the directional tendency of a drilling assembly in real-time |
| 08/20/2002 | US6437326 Permanent optical sensor downhole fluid analysis systems |
| 08/20/2002 | US6435286 Apparatus and method for detecting a location and an orientation of an underground boring tool |
| 08/20/2002 | US6435030 Measurement of propagating acoustic waves in compliant pipes |
| 08/20/2002 | CA2372287A1 Method and apparatus for connecting a main well bore and a lateral branch |
| 08/15/2002 | WO2002063341A1 Downhole telemetry and control system |
| 08/15/2002 | WO2002063138A1 Downhole logging into place tool |
| 08/15/2002 | WO2002063137A1 Method of placing downhole tools in a wellbore |
| 08/15/2002 | WO2002063136A1 Method for analysing a completion system |
| 08/15/2002 | WO2001046548A9 Technique for signal detection using adaptive filtering in mud pulse telemetry |
| 08/15/2002 | WO2001040627A8 Leak detection method |
| 08/15/2002 | US20020109080 Wellbores utilizing fiber optic-based sensors and operating devices |
| 08/15/2002 | US20020108487 Apparatus and method for actuating arms |
| 08/14/2002 | EP1230464A2 High data rate acoustic telemetry system |
| 08/14/2002 | EP1149228A4 Apparatus for measuring downhole drilling efficiency parameters |
| 08/14/2002 | EP0973996B1 Downhole monitoring method and device |
| 08/14/2002 | CN2505594Y Uniform releasing isotope releasing arrangement |
| 08/14/2002 | CN1363844A Capacitance method for logging well and complex-resistivity well-logging instrument series |
| 08/13/2002 | US6434084 Adaptive acoustic channel equalizer & tuning method |
| 08/13/2002 | US6431270 Downhole tools with a mobility device |
| 08/13/2002 | CA2072228C Steerable rotary drilling systems |
| 08/08/2002 | WO2002061239A1 Method to evaluate the hydrocarbon potential of sedimentary basins from fluid inclusions |
| 08/08/2002 | US20020106179 Light path |
| 08/08/2002 | US20020105858 Borehole logging apparatus for deep well drilling |
| 08/08/2002 | US20020105334 Drill string enabling information to be transmitted |
| 08/08/2002 | US20020105331 Multi-frequency boring tool locating system and method |
| 08/08/2002 | US20020104685 Method of and system for controlling directional drilling |
| 08/08/2002 | US20020104653 Apparatus and methods for placing downhole tools in a wellbore |
| 08/08/2002 | US20020104380 Apparatus for measuring forces on well logging instruments |
| 08/08/2002 | US20020104328 Downhole sorption cooling and heating in wireline logging and monitoring while drilling |
| 08/08/2002 | DE10104336A1 Vorrichtung zum gelenkten Horizontalbohren mit Sender und Empfänger Apparatus for guided horizontal drilling with transmitter and receiver |
| 08/08/2002 | CA2370987A1 Borehole logging apparatus for deep well drilling |