| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
|---|
| 08/07/2002 | EP1228290A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 08/07/2002 | EP0760942B1 Apparatus for testing a shear thickening plugging fluid |
| 08/07/2002 | CN1088791C Permanent magnet for NMR logging instrument |
| 08/06/2002 | US6429787 Rotating RF system |
| 08/06/2002 | US6429784 Casing mounted sensors, actuators and generators |
| 08/06/2002 | US6429653 Method and apparatus for protecting a sensor in a drill collar |
| 08/06/2002 | US6427785 Subsurface measurement apparatus, system, and process for improved well drilling, control, and production |
| 08/06/2002 | US6427783 Steerable modular drilling assembly |
| 08/06/2002 | US6427530 Apparatus and method for formation testing while drilling using combined absolute and differential pressure measurement |
| 08/06/2002 | US6427529 Instrument for surveying the depth and volume of oil and brine in a static fluid column of an oil well |
| 08/06/2002 | CA2235760C Automatic well test system and method of operating the same |
| 08/01/2002 | WO2002059461A1 A pressure pulse generator |
| 08/01/2002 | WO2002059460A1 Pressure pulse generator for mwd |
| 08/01/2002 | WO2002059459A1 Drilling signalling system |
| 08/01/2002 | WO2002059458A2 Instrumented cementing plug and system |
| 08/01/2002 | WO2002059455A1 Method and system for enhanced access to a subterranean zone |
| 08/01/2002 | CA2435790A1 A pressure pulse generator |
| 08/01/2002 | CA2398381A1 Instrumented cementing plug and system |
| 07/31/2002 | EP1227343A2 Trenchless underground boring system with boring tool location |
| 07/31/2002 | EP1227216A1 Drill string for transmitting information |
| 07/31/2002 | EP1226336A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 07/31/2002 | EP1226335A1 Asphaltenes monitoring and control system |
| 07/31/2002 | CN1361847A A method and apparatus for acquiring data in a hydrocarbon well in production |
| 07/30/2002 | US6426917 Reservoir monitoring through modified casing joint |
| 07/30/2002 | US6425298 Apparatus for passive removal of subsurface contaminants and volume flow measurement |
| 07/26/2002 | CA2369380A1 Apparatus and method for electrically controlling multiple downhole devices |
| 07/25/2002 | WO2002057805A2 Method and system for monitoring smart structures utilizing distributed optical sensors |
| 07/25/2002 | WO2002057595A1 Measuring the in situ static formation temperature |
| 07/25/2002 | WO2002057590A2 Backreamer |
| 07/25/2002 | WO2002057589A2 Internal power source for downhole detection system |
| 07/25/2002 | US20020096364 Establishing positions of locating field detectors and path mapping in underground boring tool applications |
| 07/25/2002 | US20020096363 Method and apparatus for measuring mud and formation properties downhole |
| 07/25/2002 | US20020096362 Backreamer |
| 07/25/2002 | US20020096336 Method and system for surface production of gas from a subterranean zone |
| 07/25/2002 | US20020096325 Wireless packer/anchor setting or activation |
| 07/25/2002 | US20020096324 Production optimization methodology for multilayer commingled reservoirs using commingled reservoir production performance data and production logging information |
| 07/25/2002 | US20020096323 Measuring of fluid level in a well |
| 07/25/2002 | US20020096321 Method of determining the thermal profile of a drilling fluid in a well |
| 07/25/2002 | CA2412041A1 Method and system for monitoring smart structures utilizing distributed optical sensors |
| 07/24/2002 | EP1225301A1 Hollow drill pipe for transmitting information |
| 07/24/2002 | EP1224710A1 Electromagnetic antenna extension assembly and method |
| 07/24/2002 | EP1224440A2 Multiphase flow measurement system |
| 07/24/2002 | CN1088143C Circuit for data transmission of downhole instruments for petroleum logging |
| 07/24/2002 | CN1088142C Acoustic detector for transmitted pressure and temp. parameters |
| 07/23/2002 | US6422782 Apparatus for mounting an electronic device for use in directional drilling |
| 07/23/2002 | US6422312 Multizone production monitoring system |
| 07/23/2002 | CA2092912C Transmission of data in boreholes |
| 07/19/2002 | CA2559355A1 Continuous measurement-while-drilling surveying |
| 07/19/2002 | CA2338075A1 Continuous measurement-while-drilling surveying |
| 07/18/2002 | WO2002055841A2 Well screen having a line extending therethrough |
| 07/18/2002 | WO2002055832A2 Conductive medium for openhole logging and logging while drilling |
| 07/18/2002 | US20020093431 Method and apparatus for determining position in a pipe |
| 07/18/2002 | US20020093345 Zero to 100% water in liquid hydrocarbon flow meter |
| 07/17/2002 | EP1222361A1 The method of and apparatus for determining the path of a well bore under drilling conditions |
| 07/17/2002 | EP1222360A1 Tool assembly and monitoring applications using same |
| 07/17/2002 | EP1222359A1 Apparatus for transferring electrical energy between rotating and non-rotating members of downhole tools |
| 07/17/2002 | CN2500432Y Press cake type adjustable wench |
| 07/17/2002 | CN1087806C Apparatus and method for determinating integrity of oil well tubing |
| 07/16/2002 | US6421298 Mud pulse telemetry |
| 07/16/2002 | US6419032 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |
| 07/16/2002 | US6419024 Deviated borehole drilling assembly |
| 07/16/2002 | US6419023 Deviated borehole drilling assembly |
| 07/16/2002 | US6419021 Deviated borehole drilling assembly |
| 07/16/2002 | US6419013 Well logging method & apparatus |
| 07/16/2002 | US6419012 Deviated borehole drilling assembly |
| 07/16/2002 | US6419010 Deviated borehole drilling assembly |
| 07/16/2002 | CA2082309C Portable well analyzer |
| 07/11/2002 | WO2002054636A2 Data transmission in pipeline systems |
| 07/11/2002 | WO2002054111A1 Capacitance well logging method and a series of complex resistivity well logging apparatus |
| 07/11/2002 | WO2002053871A1 Centralizer including measurement means |
| 07/11/2002 | US20020088744 Well screen having a line extending therethrough |
| 07/11/2002 | US20020088620 Interactive and/or secure activation of a tool |
| 07/11/2002 | US20020088618 System for separately producing water and oil from a reservoir |
| 07/10/2002 | EP1221059A1 Obtaining an image of an underground formation |
| 07/10/2002 | EP1220974A1 Method of drilling a wellbore with disengagable couplers |
| 07/10/2002 | EP1220973A1 Device for the progress-controlled drilling of bores |
| 07/09/2002 | US6417667 Method for logging and determining wellbore diameter by processing of progressive subsurface electromagnetic resistivity measurements |
| 07/09/2002 | US6417666 Boring tool tracking system and method using magnetic locating signal and wire-in-pipe data |
| 07/09/2002 | US6415864 System and method for separately producing water and oil from a reservoir |
| 07/09/2002 | CA2239210C Instrumentation tubing string assembly for use in wellbores |
| 07/04/2002 | US20020084913 Data transmission in pipeline systems |
| 07/04/2002 | US20020084071 Determination of plunger location and well performance parameters in a borehole plunger lift system |
| 07/03/2002 | EP1218618A2 Real-time control system and method for controlling an underground boring machine |
| 07/03/2002 | EP0882172B1 Downhole tool |
| 07/03/2002 | EP0787242B1 Method and system for operating a downhole tool |
| 07/03/2002 | CN2498597Y Straight storing electronic pressure meter |
| 07/03/2002 | CN2498323Y Embedded suspension diverter body on sealed hole top |
| 07/02/2002 | US6414905 Method and apparatus for communicating coded messages in a wellbore |
| 07/02/2002 | US6412614 Downhole shock absorber |
| 07/02/2002 | US6412556 Cavity positioning tool and method |
| 07/02/2002 | US6412555 System and method for controlling fluid flow in one or more oil and/or gas wells |
| 06/27/2002 | WO2002050400A2 Method for determining magnetometer errors during wellbore surveying |
| 06/27/2002 | US20020080682 Method and apparatus for suppressing drillstring vibrations |
| 06/27/2002 | US20020079899 Subsurface monitoring and borehole placement using a modified tubular equipped with tilted or transverse magnetic dipoles |
| 06/27/2002 | US20020079136 Mapping tool for tracking and/or guiding an underground boring tool |
| 06/27/2002 | US20020078745 Detector assemblies and methods |
| 06/25/2002 | US6411094 System and method for determining orientation to an underground object |
| 06/25/2002 | US6409476 Pumpjack dynamometer and method |
| 06/25/2002 | US6408943 Method and apparatus for placing and interrogating downhole sensors |
| 06/25/2002 | CA2256557C Short hop telemetry system and method |