| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 08/13/2009 | CA2714484A1 System for spatially monitoring a borehole in real-time |
| 08/12/2009 | EP2088282A2 Casing or work string orientation indicating apparatus and methods |
| 08/12/2009 | EP2087380A1 A method of downhole, non-isotopic generation of ionised radiation and an apparatus for use when practising the method |
| 08/12/2009 | EP2087202A1 An apparatus for creating pressure pulses in the fluid of a bore hole |
| 08/12/2009 | CN201288548Y Drilling data wireless transmission apparatus for gas drilling |
| 08/12/2009 | CN201288547Y Tooth limiting echanical drilling inclinometer for eccentric burrel |
| 08/12/2009 | CN201288546Y Dual lateral direction anti-scratching electrode ring for horizontal well |
| 08/12/2009 | CN201288545Y Oil field single well liquid and gas non-separation automatic metering apparatus |
| 08/12/2009 | CN201288544Y Combined test instrument for flow seal inspection |
| 08/12/2009 | CN100526601C Dynamic test device for composite perforator |
| 08/12/2009 | CA2650081A1 Simultaneous analysis of two data sets from a formation test |
| 08/12/2009 | CA2649483A1 Refined analytical model for formation parameter calculation |
| 08/11/2009 | US7573397 System and method for downhole telemetry |
| 08/11/2009 | US7571778 Method of drilling a bore hole |
| 08/11/2009 | US7571777 Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell |
| 08/11/2009 | US7571644 Characterizing a reservoir in connection with drilling operations |
| 08/11/2009 | CA2634236C Gap-sub assembly for a downhole telemetry system |
| 08/11/2009 | CA2561668C Downhole light generating systems and methods of use |
| 08/11/2009 | CA2509819C Methods and apparatus for reducing electromagnetic signal noise |
| 08/08/2009 | CA2652901A1 Location marker for distributed temperature sensing systems |
| 08/06/2009 | WO2009097507A2 Methodology for interpretation and analysis of nmr distributions |
| 08/06/2009 | WO2009097483A1 Method and apparatus for communication in well environment |
| 08/06/2009 | WO2009097392A2 Characterization of fracture length and formation resistivity from array induction data |
| 08/06/2009 | WO2009097189A1 Well thermal insulation for formation sampling of viscous fluids |
| 08/06/2009 | WO2009068947A3 Methods and apparatus for telemetry and power delivery |
| 08/06/2009 | WO2008146163A4 Method of measuring a dry gas flow from. hydrocarbon wells |
| 08/06/2009 | US20090196774 System, method and apparatus for electrical submersible pump assembly with pump discharge head having an integrally formed discharge pressure port |
| 08/06/2009 | US20090194333 Ranging methods for developing wellbores in subsurface formations |
| 08/06/2009 | US20090194332 Method and apparatus for collecting drill bit performance data |
| 08/06/2009 | US20090194296 Extended Length Cable Assembly for a Hydrocarbon Well Application |
| 08/06/2009 | US20090194277 Single trip tubing punch and setting tool |
| 08/06/2009 | US20090194275 Methods of Retrieving Data from a Pipe Conveyed Well Logging Assembly |
| 08/06/2009 | US20090194274 Statistical determination of historical oilfield data |
| 08/06/2009 | US20090194273 Method and Apparatus for Orchestration of Fracture Placement From a Centralized Well Fluid Treatment Center |
| 08/06/2009 | US20090194271 Carrier Assembly for a Pipe Conveyed Well Logging Assembly |
| 08/06/2009 | US20090194270 Latchable Carrier Assembly for Pipe Conveyed Well Logging |
| 08/06/2009 | US20090193885 Flow metering device |
| 08/05/2009 | EP1929125B1 System for tracking and maintaining an on-grade horizontal borehole |
| 08/05/2009 | EP1511917B1 Method and apparatus for a high resolution downhole spectrometer |
| 08/05/2009 | CN201284649Y Bottom vibration absorber of electronic list multi-point measuring instrument |
| 08/05/2009 | CN201284648Y Real-time wireless monitoring device for oil extraction well |
| 08/05/2009 | CN201284647Y Neutron generator inflation sealing apparatus of impulse neutron bidirectional oxygen activation logging instrument |
| 08/05/2009 | CN201284646Y Piece suspension device |
| 08/05/2009 | CN201284645Y Down-hole ultrasonic flowmeter |
| 08/05/2009 | CN201284639Y Logging steel wire arranging oil scraper |
| 08/05/2009 | CN101501298A Methods and devices for analyzing and controlling the propagation of waves in a borehole generated by water hammer |
| 08/05/2009 | CN101501297A Modular geosteering tool assembly |
| 08/05/2009 | CN101499330A 电缆 Cable |
| 08/05/2009 | CN101498214A Measuring and calculating method for eccentric circular pipe power-law fluid in annulus |
| 08/05/2009 | CN101498211A Method for water distribution by sound wave remote control |
| 08/05/2009 | CN100523429C Overground gathering and transporting system for petroleum exploitation and method thereof |
| 08/05/2009 | CA2652502A1 Dual conductor fiber optic cable |
| 08/04/2009 | US7570060 Tracking positions of personnel, vehicles, and inanimate objects |
| 08/04/2009 | US7568532 Electromagnetically determining the relative location of a drill bit using a solenoid source installed on a steel casing |
| 08/04/2009 | US7568522 System and method for deflection compensation in power drive system for connection of tubulars |
| 08/04/2009 | CA2561402C Composite spoolable tube with sensor |
| 08/04/2009 | CA2466771C Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell |
| 08/04/2009 | CA2401730C Controllable production well packer |
| 08/04/2009 | CA2387976C Direction control in well drilling |
| 07/30/2009 | WO2009094066A2 Method and system for fracturing subsurface formations during the drilling thereof |
| 07/30/2009 | WO2009093927A1 Method and device for multiphase fraction metering based on high pressure xe filled ionization chamber |
| 07/30/2009 | WO2009092919A2 Permanent seismic source |
| 07/30/2009 | WO2009072091A3 Cuttings bed detection |
| 07/30/2009 | WO2009052096A3 Water sensing adaptable in-flow control device and method of use |
| 07/30/2009 | US20090192715 System for Tracking and Maintaining on On-Grade Horizontal Borehole |
| 07/30/2009 | US20090192712 System and method for waterflood performance monitoring |
| 07/30/2009 | US20090188718 Methods of detecting, preventing, and remediating lost circulation |
| 07/30/2009 | US20090188666 Method And System For Completing A Well |
| 07/30/2009 | US20090188665 Monitoring of Downhole Parameters and Tools Utilizing Fiber Optics |
| 07/30/2009 | US20090188663 Downhole Removable Cage with Circumferentially Disposed Instruments |
| 07/30/2009 | US20090188569 Method and apparatus for patching a well by hydroforming a tubular metal patch, and a patch for this purpose |
| 07/30/2009 | US20090188312 Apparatus and Methods for Improved Fluid Compatibility in Subterranean Environments |
| 07/29/2009 | EP2082212A1 High pressure resonant vibrating-tube densitometer |
| 07/29/2009 | EP2082116A2 Apparatus and method for estimating filtrate contamination in a formation fluid |
| 07/29/2009 | CN201280930Y Measuring arm of caliper |
| 07/29/2009 | CN201280929Y Hinge type measuring bar |
| 07/29/2009 | CN201280928Y Spiral type guard tile |
| 07/29/2009 | CN201280927Y Underground pipeline detecting and prewarning apparatus |
| 07/29/2009 | CN101493008A Strapping inertial navigation gyroscope clinometer based on MEMS device |
| 07/28/2009 | US7567485 Method and apparatus for borehole sensing |
| 07/28/2009 | US7566235 Electrical connection assembly |
| 07/28/2009 | US7565936 Combined telemetry system and method |
| 07/28/2009 | US7565834 Methods and systems for investigating downhole conditions |
| 07/28/2009 | US7565833 Automatic adjustment of NMR pulse sequence to optimize SNR based on real time analysis |
| 07/28/2009 | CA2625281C Field development system and associated methods |
| 07/28/2009 | CA2593440C Apparatus and method for locating joints in coiled tubing operations |
| 07/27/2009 | CA2595220A1 A method and a system for determining the position of a drill bit |
| 07/23/2009 | WO2009091979A2 Method for 3-c 3-d wavefield decomposition |
| 07/23/2009 | WO2009091956A2 Apparatus and method for time measurement in downhole measurement processes |
| 07/23/2009 | WO2009091914A2 Identification of stress in formations using angles of fast and slow dipole waves in borehole acoustic logging |
| 07/23/2009 | WO2009091907A1 Downhole multi-phase flow imager |
| 07/23/2009 | WO2009091690A2 Parasitically powered signal source and method |
| 07/23/2009 | WO2009091422A2 Wireless perforating gun initiation |
| 07/23/2009 | WO2009091413A1 Apparatus and method for detecting pressure signals |
| 07/23/2009 | WO2009091408A1 Em-guided drilling relative to an existing borehole |
| 07/23/2009 | WO2009091290A1 Device for measuring the inside diameter of a pipe |
| 07/23/2009 | WO2009091283A2 A method of saturated formation permeability determination |
| 07/23/2009 | WO2009090494A2 Subsurface tagging system with wired tubulars |
| 07/23/2009 | WO2009090468A1 Method for sonic indication of voids in casing cement of a borehole |
| 07/23/2009 | WO2009090466A2 Downhole sensing system using carbon nanotube fet |