| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 08/29/2000 | CA2012772C Method and device for production logging in flowing well |
| 08/24/2000 | WO2000049273A1 Method of installing a sensor in a well |
| 08/24/2000 | WO2000049268A1 Casing mounted sensors |
| 08/23/2000 | EP1009907A4 Apparatus and method for determining integrity of oil well tubing |
| 08/23/2000 | CN1263978A Bridge-type eccentric testing and injection-recovery apparatus |
| 08/23/2000 | CN1263977A Rotation steerable drilling system using sliding sleeve |
| 08/22/2000 | US6108268 Impedance matched joined drill pipe for improved acoustic transmission |
| 08/22/2000 | US6105690 Method and apparatus for communicating with devices downhole in a well especially adapted for use as a bottom hole mud flow sensor |
| 08/17/2000 | WO2000047870A1 A method for use in sampling and/or measuring in reservoir fluid |
| 08/17/2000 | WO2000047869A1 Method and apparatus for protecting a sensor in a drill collar |
| 08/17/2000 | DE10003253A1 Sondenortungseinrichtung Probe locating device |
| 08/16/2000 | EP1027519A1 Apparatus for directional drilling |
| 08/15/2000 | US6102122 Control of heat injection based on temperature and in-situ stress measurement |
| 08/15/2000 | US6102115 Integral standoff of induction sondes to minimize correction of borehole conductivity effects |
| 08/10/2000 | WO2000046616A1 A method of saving a string of tools installed in an oil well, and a corresponding transmission assembly |
| 08/10/2000 | WO2000046485A2 Apparatus and method for enhancing remote sensor performance |
| 08/10/2000 | WO2000046479A1 Multilateral well and electrical transmission system |
| 08/09/2000 | EP1025332A2 Multi-well computerized control of fluid pumping |
| 08/09/2000 | CN2391015Y Three-sounding wave testing device |
| 08/09/2000 | CN2391014Y Electric measuring multi-point extensometer |
| 08/09/2000 | CN2391013Y Multipurpose slope determining instrument controller |
| 08/09/2000 | CN2391012Y Special blowout preventer for production logging |
| 08/09/2000 | CN2391011Y Flow collector for water exploration instrument |
| 08/09/2000 | CN1055339C Method for surveying well by radioactive isotope tracking |
| 08/08/2000 | US6101445 Apparatus, system and method to transmit and display acquired well data in near real time at a remote location |
| 08/03/2000 | WO2000045099A2 Cooling system for downhole tools |
| 08/03/2000 | WO2000045031A1 Controlling production |
| 08/03/2000 | WO2000000799A9 Non-intrusive fiber optic pressure sensor for measuring unsteady pressures within a pipe |
| 08/01/2000 | US6098020 Downhole monitoring method and device |
| 08/01/2000 | US6098017 Adjustable head assembly for ultrasonic logging tools that utilize a rotating sensor subassembly |
| 08/01/2000 | US6097310 Method and apparatus for mud pulse telemetry in underbalanced drilling systems |
| 08/01/2000 | US6095260 System, arrangements and associated methods for tracking and/or guiding an underground boring tool |
| 08/01/2000 | CA2131576C Motion compensation apparatus and method of gyroscopic instruments for determining heading of a borehole |
| 08/01/2000 | CA2002734C Subsea wellhead with annulus monitoring system |
| 07/25/2000 | US6092598 Method and apparatus for measuring operating parameters of a submergible pumping system |
| 07/20/2000 | WO2000042416A1 Optical tool and method for analysis of formation fluids |
| 07/20/2000 | WO2000042287A1 Automated bore planning method and apparatus for horizontal directional drilling |
| 07/20/2000 | WO2000029707A3 Monitoring performance of downhole equipment |
| 07/20/2000 | CA2361240A1 Automated bore planning method and apparatus for horizontal directional drilling |
| 07/19/2000 | CN1260857A Earth formation surveying device |
| 07/18/2000 | US6089345 Elastic wave exploration tool for wells |
| 07/18/2000 | US6089332 Steerable rotary drilling systems |
| 07/12/2000 | CN2387267Y Portable wellhead detecting connector |
| 07/12/2000 | CN2387266Y Single core ring air logging instrument |
| 07/11/2000 | US6085836 Well pump control using multiple sonic level detectors |
| 07/06/2000 | WO2000039433A1 Method for detecting inflow of fluid in a well while drilling and implementing device |
| 07/06/2000 | WO2000000799A8 Non-intrusive fiber optic pressure sensor for measuring unsteady pressures within a pipe |
| 07/05/2000 | EP1015728A1 Bottomhole assembly orienting sub |
| 07/05/2000 | EP1012443A4 Subsurface measurement apparatus, system, and process for improved well drilling, control, and production |
| 07/05/2000 | CN1259188A An erectable arm assembly for use in boreholes |
| 07/05/2000 | CN1258806A Four-parameter logging instrument with transducing optical fiber for vapor injecting well |
| 07/04/2000 | US6084052 Use of polyaryletherketone-type thermoplastics in downhole tools |
| 07/04/2000 | US6082470 Directional drilling system and apparatus |
| 07/04/2000 | US6082455 Combination side pocket mandrel flow measurement and control assembly |
| 07/04/2000 | US6082454 Spooled coiled tubing strings for use in wellbores |
| 06/28/2000 | EP1012443A1 Subsurface measurement apparatus, system, and process for improved well drilling, control, and production |
| 06/28/2000 | EP0977931A4 Multizone production monitoring system |
| 06/28/2000 | CN1053968C Improved slick line system with real-time surface display |
| 06/27/2000 | US6079506 Boring tool control using remote locator |
| 06/27/2000 | US6079505 System and method for the acquisition of physical data linked to a drilling operation in progress |
| 06/27/2000 | US6079490 Remotely accessible mobile repair unit for wells |
| 06/22/2000 | WO2000036386A1 Apparatus and method for protecting devices, especially fibre optic devices, in hostile environments |
| 06/22/2000 | WO2000036273A1 Apparatus for measuring downhole drilling efficiency parameters |
| 06/22/2000 | WO2000009855A9 Hydraulic well control system |
| 06/22/2000 | CA2644328A1 Apparatus and method for protecting devices, especially fibre optic devices, in hostile environments |
| 06/21/2000 | EP1009907A1 Apparatus and method for determining integrity of oil well tubing |
| 06/21/2000 | CN1053763C Adjoint alpha neutron tube for logging |
| 06/20/2000 | US6076398 Method for measuring of flow and flowmeter |
| 06/20/2000 | US6076268 Tool orientation with electronic probes in a magnetic interference environment |
| 06/18/2000 | CA2292917A1 System for the permanent installation of sensors inside a duct with a latch that can be moved by fluid pressure |
| 06/18/2000 | CA2292816A1 System for the permanent installation of sensors against the inner surface of a duct |
| 06/15/2000 | WO2000034623A1 Method and rock drilling apparatus for controlling rock drilling |
| 06/15/2000 | WO2000034622A1 Downhole tool detection means |
| 06/15/2000 | DE19919555C1 Extraction of geothermal energy from blind bores involves closed circuit feed of heat transmission medium with first chamber in heat exchanger tube for feed of cold fluid |
| 06/14/2000 | EP1008717A1 Rotary steerable well drilling system utilizing sliding sleeve |
| 06/14/2000 | EP0882297B1 Treatment of radioactive material |
| 06/13/2000 | US6075462 Adjacent well electromagnetic telemetry system and method for use of the same |
| 06/13/2000 | US6075461 Disposable electromagnetic signal repeater |
| 06/13/2000 | CA2179184C Whipstock apparatus and methods of use |
| 06/08/2000 | WO2000033492A1 Method and apparatus for remote actuation of a downhole device in a subsea well |
| 06/08/2000 | WO2000033108A1 High-power well logging method and apparatus |
| 06/07/2000 | EP1005602A1 Drilling system with means for anchoring in the borehole |
| 06/07/2000 | CN1053255C Prodn. pipe for prodn. of oil or gas from oil or gas reservoir |
| 06/06/2000 | US6070677 Method and apparatus for enhancing production from a wellbore hole |
| 06/06/2000 | US6070667 Lateral wellbore connection |
| 06/06/2000 | US6070662 Formation pressure measurement with remote sensors in cased boreholes |
| 06/06/2000 | CA2107322C Method and system for measurement of internal tube dimensions within a wellbore |
| 06/02/2000 | WO2000031509A1 Pressure and temperature transducer |
| 06/02/2000 | WO2000031376A2 Method and system for accessing subterranean deposits from the surface |
| 06/02/2000 | CA2792184A1 Method and system for accessing subterranean deposits from the surface |
| 05/31/2000 | EP1004745A2 Downhole pressure actuated locating system and locating method |
| 05/31/2000 | EP0890014B1 Method and system for monitoring a characteristic of an earth formation in a well |
| 05/31/2000 | CN2380685Y Conveying apparatus for pettroleum drilling-logging instruments |
| 05/30/2000 | US6068394 Method and apparatus for providing dynamic data during drilling |
| 05/30/2000 | CA2019421C Apparatus used for well drilling operations and method therefor |
| 05/25/2000 | WO2000030299A1 Transmitting information over a communication link |
| 05/25/2000 | WO2000030013A1 Method for correcting well log data for effects of changes in instrument velocity (cable yo-yo) |
| 05/25/2000 | WO2000029719A1 Communications system in a well |
| 05/25/2000 | WO2000029718A1 A method of installing components in a downhole apparatus, and apparatus obtained thereby |
| 05/25/2000 | WO2000029717A2 Communications system having redundant channels |