| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 06/17/2004 | US20040114463 Clamp mechanism for in-well seismic station |
| 06/17/2004 | US20040112601 Apparatus and method for actively cooling instrumentation in a high temperature environment |
| 06/17/2004 | US20040112597 Packer set monitoring and compensating system and method |
| 06/17/2004 | US20040112596 Use of fiber optics in deviated flows |
| 06/17/2004 | US20040112595 Permanent downhole deployment of optical sensors |
| 06/16/2004 | EP1428976A2 System and method for processing and transmitting information from measurements made while drilling |
| 06/16/2004 | EP1428975A1 Packer set monitoring and control |
| 06/16/2004 | EP1163419B1 Control method for use with a steerable drilling system |
| 06/16/2004 | CN1154251C Method and system for transmitting information by electromagnetic wave |
| 06/16/2004 | CN1153891C Hierarchical monitor method for parameters of oil recovering layer in oil well |
| 06/15/2004 | US6750440 Opto-electrical actuation system and method |
| 06/15/2004 | US6749030 Integrated transmitter surveying while boring entrenching powering device for the continuation of a guided bore hole |
| 06/15/2004 | US6749029 Automated bore planning method and apparatus for horizontal directional drilling |
| 06/10/2004 | WO2004048969A1 Apparatus and method for analysing downhole water chemistry |
| 06/10/2004 | WO2004048893A1 Method for determining a track of a geographical trajectory |
| 06/10/2004 | WO2004048892A1 Method for determining a track of a geographical trajectory |
| 06/10/2004 | WO2004033855A3 Well control using pressure while drilling measurements |
| 06/10/2004 | US20040111212 Method for determining a track of a geographical trajectory |
| 06/10/2004 | US20040109228 Fiber optic amplifier for oilfield applications |
| 06/10/2004 | US20040109156 Method and apparatus for a downhole refractometer and attenuated reflectance spectrometer |
| 06/10/2004 | US20040108118 Fibre optic well control system |
| 06/10/2004 | US20040108114 Providing electrical isolation for a downhole device |
| 06/10/2004 | US20040108110 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 06/10/2004 | US20040108108 Methods and apparatus to control downhole tools |
| 06/10/2004 | US20040107590 Borehole surveying |
| 06/09/2004 | EP1426552A2 Method of recovery of hydrocarbons from a subterranean reservoir |
| 06/09/2004 | EP1425890A2 Power source regulation along a transmission line with feedback loop |
| 06/09/2004 | CN1503879A Fluid controlled pumping system and method |
| 06/09/2004 | CN1502787A Logging while tripping with modified tubular |
| 06/08/2004 | US6747570 Method for preventing fracturing of a formation proximal to a casing shoe of well bore during drilling operations |
| 06/08/2004 | US6747569 Downhole telemetry and control system |
| 06/08/2004 | US6747270 Method and apparatuses for logging hydrocarbon reservoirs |
| 06/08/2004 | US6745833 Method of utilizing flowable devices in wellbores |
| 06/08/2004 | US6745487 Downhole cable length measuring apparatus |
| 06/03/2004 | WO2004046640A1 Device for substantially continuous measurement of diameter variations in a conduit inner wall |
| 06/03/2004 | WO2004046506A1 Acoustic devices to measure ultrasound velocity in drilling mud |
| 06/03/2004 | WO2004046505A2 Bottomhole assembly |
| 06/03/2004 | US20040105342 Coiled tubing acoustic telemetry system and method |
| 06/03/2004 | US20040104821 Retrievable subsurface nuclear logging system |
| 06/03/2004 | US20040104797 Downhole data transmission system |
| 06/03/2004 | US20040104726 Formation resistivity measurement sensor contained onboard a drill bit (resistivity in bit) |
| 06/03/2004 | US20040104341 Methods and apparatus for the downhole characterization of formation fluids |
| 06/03/2004 | DE69816743T2 Fiberoptische sensoren und ansteuervorrichtungen in bohrloechern Fiberoptic Sensors and Control devices in boreholes |
| 06/03/2004 | DE10249849B3 Width detection device for high pressure injection column e.g. for cement foundations, using flat material measuring band projecting through opening in wall of boring rod |
| 06/03/2004 | CA2506743A1 Acoustic devices to measure ultrasound velocity in drilling mud |
| 06/03/2004 | CA2451502A1 Methods and apparatus for the downhole characterization of formation fluids |
| 06/02/2004 | CN1502005A Length correction system and methods |
| 06/02/2004 | CN1500965A Monitor system for coring operation |
| 06/01/2004 | US6742604 Rotary control of rotary steerables using servo-accelerometers |
| 05/27/2004 | WO2004045107A1 Code-division multiple-access (cdma) wireline telemetry system |
| 05/27/2004 | WO2004044695A2 A method and apparatus for dynamic checking and reporting system health |
| 05/27/2004 | WO2004044379A2 Downhole hydraulic control line connector |
| 05/27/2004 | WO2004044369A2 Method for reservoir navigation using formation pressure testing measurement while drilling |
| 05/27/2004 | US20040100866 Data recovery for pulse telemetry using pulse position modulation |
| 05/27/2004 | US20040099418 Reservoir communication by creating a local underbalance and using treatment fluid |
| 05/27/2004 | US20040099415 Pressure containing assembly used to detect the location of anomalies within a blowout preventer (BOP) stack |
| 05/27/2004 | DE10253123A1 Underground inspection device in particular suitable for vertical pipe, comprising rotating disks and soil conveyor worms |
| 05/26/2004 | EP1421153A1 Electrically conductive oil-based mud |
| 05/25/2004 | US6741185 Digital signal receiver for measurement while drilling system having noise cancellation |
| 05/25/2004 | CA2238883C Use of acoustic emission in rock formation analysis |
| 05/25/2004 | CA2156317C Synchronizer for pulse code modulation telemetry |
| 05/21/2004 | WO2004042185A1 Downhole cutting locator tool |
| 05/21/2004 | WO2004003506A3 In-situ detection and analysis of coal bed methane formations |
| 05/21/2004 | WO2003036037A3 Installation and use of removable heaters in a hydrocarbon containing formation |
| 05/20/2004 | US20040098202 Method for measuring fluid chemistry in drilling and production operations |
| 05/20/2004 | US20040096614 Composite spoolable tube with sensor |
| 05/20/2004 | US20040095848 Transducers coated with anechoic material for use in down hole communications |
| 05/20/2004 | US20040095847 Acoustic devices to measure ultrasound velocity in drilling mud |
| 05/20/2004 | US20040094303 Inductively coupled method and apparatus of communicating with wellbore equipment |
| 05/20/2004 | US20040094297 Method for determining the extent of recovery of materials injected into oil wells or subsurface formations during oil and gas exploration and production |
| 05/19/2004 | EP1082517B1 Generating commands for a downhole tool |
| 05/19/2004 | DE10251496A1 Einrichtung zur Erzeugung von elektrischer Energie und von Druckimpulsen zur Signalübertragung Means for generation of electrical energy and pressure pulses to the signal transmission |
| 05/19/2004 | CN1497267A Sensor for detecting magnetic-field in underground casing area |
| 05/18/2004 | US6736222 Relative drill bit direction measurement |
| 05/18/2004 | US6736221 Method for estimating a position of a wellbore |
| 05/18/2004 | US6736210 Apparatus and methods for placing downhole tools in a wellbore |
| 05/18/2004 | CA2254419C Adjacent well electromagnetic telemetry system and method for use of the same |
| 05/18/2004 | CA2128473C A method and apparatus for transmitting information relating to the operation of a downhole electrical device |
| 05/13/2004 | WO2004001352A3 Apparatus and method of monitoring and signaling for downhole tools |
| 05/13/2004 | US20040089474 Continuous measurement-while-drilling surveying |
| 05/13/2004 | US20040089447 Protection against loss of downhole tools |
| 05/13/2004 | CA2411775A1 Protection against loss of downhole tools |
| 05/12/2004 | CN1496486A Method and device for LWD shear velocity measurement |
| 05/12/2004 | CN1496438A Logging system for use in wellbore |
| 05/12/2004 | CN1495336A Method for measuring formation characteristics by utilizing time-limited formation test |
| 05/12/2004 | CN1149404C Polar plate for high-temperature, high-pressure and micro-resistif scanning and imaging logging instrument |
| 05/12/2004 | CN1149386C Method of monitoring the diameter for cylindrical body made by injection process |
| 05/11/2004 | US6732792 Multi-well structure for accessing subterranean deposits |
| 05/11/2004 | CA2298859C A method for determining equivalent static mud density during a connection using downhole pressure measurements |
| 05/06/2004 | WO2004038177A1 Method and device for determining the position of an interface in relation to a bore hole |
| 05/06/2004 | WO2004038163A2 Drill pipe having an internally coated electrical pathway |
| 05/06/2004 | US20040088115 Method and apparatus for dynamic checking and reporting system health |
| 05/06/2004 | US20040085988 Code-division multiple-access (CDMA) wireline telemetry system |
| 05/06/2004 | US20040085223 Device for producing of electric energy and of signal transmitting pressure pulses |
| 05/06/2004 | US20040084218 Establishing positions of locating field detectors and path mapping in underground boring tool applications |
| 05/06/2004 | US20040084189 Instrumentation for a downhole deployment valve |
| 05/06/2004 | US20040084185 Cutting locator tool |
| 05/06/2004 | US20040084180 System and method for estimating multi-phase fluid rates in a subterranean well |
| 05/06/2004 | US20040083805 Methods and apparatus for rapidly measuring pressure in earth formations |
| 05/06/2004 | US20040083804 Conductive fluid logging sensor and method |