| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 12/14/2004 | US6830467 Electrical transmission line diametrical retainer |
| 12/14/2004 | US6829947 Acoustic Doppler downhole fluid flow measurement |
| 12/14/2004 | US6829928 Method of accurately gauging groundwater and nonaqueous phase liquid contaminants which eliminates cross contamination between wells |
| 12/14/2004 | CA2335075C Method for magnetic survey calibration and estimation of uncertainty |
| 12/09/2004 | WO2004106942A2 Method for measuring fluid chemistry in drilling and production operations |
| 12/09/2004 | US20040249573 Well twinning techniques in borehole surveying |
| 12/09/2004 | US20040248314 Determining flow fraction of mixture in hydrocarbon reservoir and extracting flow fraction and fluid property information from downhole measurements of mixture density and absolute pressure; measuring oil, water, and gas flow rate in each producing zone of an oil well |
| 12/09/2004 | US20040246816 Well integrity monitoring system |
| 12/09/2004 | US20040246142 Transducer for downhole drilling components |
| 12/09/2004 | US20040246141 Methods and apparatus for through tubing deployment, monitoring and operation of wireless systems |
| 12/09/2004 | US20040246140 Method and apparatus for transmitting information between a salt-cavern and the surface of the ground |
| 12/09/2004 | US20040246108 Power line communication system |
| 12/09/2004 | US20040246059 Method and system for downhole clock |
| 12/09/2004 | US20040245991 Formation imaging while drilling in non-conductive fluids |
| 12/09/2004 | US20040245020 Apparatus and methods for drilling a wellbore using casing |
| 12/09/2004 | US20040245017 Integrated drilling dynamics system |
| 12/09/2004 | US20040245016 Method for reservoir navigation using formation pressure testing measurement while drilling |
| 12/09/2004 | US20040244972 Method, apparatus and system for pore pressure prediction in presence of dipping formations |
| 12/09/2004 | US20040244970 Determination of thermal properties of a formation |
| 12/09/2004 | US20040244475 Pressure monitoring technique and applications involving wells |
| 12/08/2004 | EP1484473A1 Method and apparatus for acoustic detection of a fluid leak behind a casing of a borehole |
| 12/08/2004 | EP1484471A2 Improved transmission element for downhole drilling components |
| 12/07/2004 | US6828547 Wellbores utilizing fiber optic-based sensors and operating devices |
| 12/07/2004 | US6827149 Method and apparatus for conveying a tool in a borehole |
| 12/07/2004 | US6827148 Downhole tool for use in a wellbore |
| 12/07/2004 | US6826954 Method and apparatus for flow measurement |
| 12/07/2004 | CA2353648C High-power well logging method and apparatus |
| 12/07/2004 | CA2052691C Method of dynamically monitoring the orientation of a curve drilling assembly |
| 12/02/2004 | WO2004104536A1 Distributed temperature sensing system with remote reference coil |
| 12/02/2004 | WO2004104373A1 Wireless well communication system and method for using the same |
| 12/02/2004 | WO2004104372A1 Well integrity monitoring system |
| 12/02/2004 | WO2004104359A1 Portable memory device for a mobile repair unit |
| 12/02/2004 | WO2004033844A3 System and method for installation and use of devices in microboreholes |
| 12/02/2004 | US20040243309 Automated bore planning system for horizontal directional drilling |
| 12/02/2004 | US20040239329 [Determination of Borehole Geometry inside Cased Wells with Crosswell Electromagnetics] |
| 12/02/2004 | US20040239316 Magnetically activated well tool |
| 12/02/2004 | US20040238224 Well drilling bit |
| 12/02/2004 | US20040238222 Directional borehole drilling system and method |
| 12/02/2004 | US20040238184 High impact communication and control system |
| 12/02/2004 | US20040238167 Method of installing control lines in a wellbore |
| 12/02/2004 | US20040238166 Methods, apparatus, and systems for obtaining formation information utilizing sensors attached to a casing in a wellbore |
| 12/02/2004 | US20040238165 Methods, apparatus, and systems for obtaining formation information utilizing sensors attached to a casing in a wellbore |
| 12/02/2004 | DE10297474T5 Verfahren und Vorrichtung zum Ausfräsen eines Abschnitts in Gegenrichtung Method and apparatus for cutting out a portion in the opposite direction |
| 12/02/2004 | DE102004023862A1 Chassis für ein Bohrlochwerkzeug Chassis for a downhole tool |
| 12/02/2004 | CA2525172A1 Portable memory device for a mobile repair unit |
| 12/02/2004 | CA2469363A1 Methods, apparatus, and systems for obtaining formation information utilizing sensors attached to a casing in a wellbore |
| 12/01/2004 | EP1254352A4 Downhole densitometer |
| 12/01/2004 | EP0803073B8 Dipmeter processing technique |
| 12/01/2004 | CN2660122Y Portable all hydrocarbon drilling time logging gage |
| 12/01/2004 | CN2660121Y PHP acquisition connector |
| 12/01/2004 | CN2660120Y High pressure filling water and metering regulator |
| 12/01/2004 | CN2660119Y Mobile modularized, full automatic metering, centrally transporting, watering and filling water appts. |
| 12/01/2004 | CN2660118Y Single well metering device |
| 11/30/2004 | US6826486 Methods and apparatus for predicting pore and fracture pressures of a subsurface formation |
| 11/30/2004 | US6823602 Continuous measurement-while-drilling surveying |
| 11/30/2004 | CA2724709A1 Field weldable connections |
| 11/30/2004 | CA2320571C Protector system for fiber optic system components in subsurface applications |
| 11/30/2004 | CA2282899C Adjustable orifice valve |
| 11/25/2004 | WO2004101956A1 On-line compositional allocation |
| 11/25/2004 | WO2004101946A2 Formation characterization using wellbore logging data |
| 11/25/2004 | WO2004027198A3 Remote intervention logic valving method and apparatus |
| 11/25/2004 | US20040236512 Method and apparatus for chemometric estimations of fluid density, viscosity, dielectric constant, and resistivity from mechanical resonator data |
| 11/25/2004 | US20040231859 Method, system & apparatus for orienting casing and liners |
| 11/25/2004 | US20040231851 Wireless well communication system and method |
| 11/25/2004 | US20040231429 Housing on the exterior of a well casing for optical fiber sensors |
| 11/24/2004 | EP1478824A2 Well system |
| 11/24/2004 | EP0852652B1 Method for isolating multi-lateral well completions while maintaining selective drainhole re-entry access |
| 11/24/2004 | CN2658399Y Tester of four-arm incline shaft logging instrument |
| 11/24/2004 | CN1549934A Flexible dynamic housing |
| 11/23/2004 | US6822579 Steerable transceiver unit for downhole data acquistion in a formation |
| 11/23/2004 | US6820701 Visual probes and methods for placing visual probes into subsurface areas |
| 11/23/2004 | US6820693 Electromagnetic telemetry actuated firing system for well perforating gun |
| 11/23/2004 | CA2346546C Downhole signal communication and measurement through a metal tubular |
| 11/18/2004 | US20040226753 Chassis for Downhole Drilling Tool |
| 11/18/2004 | US20040226720 Hydraulic control and actuation system for downhole tools |
| 11/18/2004 | US20040226715 Mapping fracture dimensions |
| 11/18/2004 | US20040226712 Portable memory device for mobile workover rig |
| 11/18/2004 | DE10316515A1 Verfahren und Vorrichtung zur Erzeugung von in einem Bohrloch übertragbaren Signalen Method and apparatus for the generation of transmitted signals in a borehole |
| 11/17/2004 | EP1476639A1 Acoustic position measurement system for well bore formation |
| 11/17/2004 | EP1476638A2 Extend of detonation determination method using seismic energy |
| 11/17/2004 | CN1546941A Three dimensional collinear measuring method for drillhole inclination survey and axial deformation |
| 11/16/2004 | US6819260 Synchronous CDMA telemetry system for use in a wellbore |
| 11/16/2004 | US6817425 Mean strain ratio analysis method and system for detecting drill bit failure and signaling surface operator |
| 11/16/2004 | US6817412 Method and apparatus for the optimal predistortion of an electromagnetic signal in a downhole communication system |
| 11/16/2004 | US6817410 Intelligent well system and method |
| 11/16/2004 | US6817257 Apparatus for the remote measurement of physical parameters |
| 11/16/2004 | US6817229 Acoustic sensor for fluid characterization |
| 11/11/2004 | WO2004097174A1 Redundant systems for downhole permanent installations |
| 11/11/2004 | WO2004097173A1 An improved shielded apparatus for electrically exploring geological formation through which a borehole passes |
| 11/11/2004 | WO2004097160A2 System and method using a continuously variable transmission to control one or more system components |
| 11/11/2004 | WO2004086093B1 Use of pattern recognition in a measurement of formation transit time for seismic checkshots |
| 11/11/2004 | WO2004044369B1 Method for reservoir navigation using formation pressure testing measurement while drilling |
| 11/11/2004 | US20040225464 On-line compositional allocation |
| 11/11/2004 | US20040222901 Downhole telemetry system using multiple uplink modes as data channels using discrete multi-tone modulation |
| 11/11/2004 | US20040222019 Measurement-while-drilling assembly using real-time toolface oriented measurements |
| 11/11/2004 | US20040222018 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |
| 11/11/2004 | US20040221987 Apparatus and method for determining the dip of an underground formation in a cased or uncased borehole |
| 11/11/2004 | US20040221986 Apparatus and methods for placing downhole tools in a wellbore |
| 11/11/2004 | CA2727134A1 Systems and methods using a continuously variable transmission to control one or more system components |
| 11/11/2004 | CA2726969A1 Systems and methods using a continuously variable transmission to control one or more system components |