| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 06/18/2009 | CA2708096A1 Method and system for delineating a second wellbore from a first wellbore |
| 06/18/2009 | CA2646521A1 A pressure measuring device and method |
| 06/17/2009 | CN201258736Y Stopping alarm for low-oil producing well |
| 06/17/2009 | CN201258735Y Rotational flow type multi-phase flow metering device |
| 06/17/2009 | CN201258734Y Wireless incline measuring system following drilling and coupling device of compound logging instrument |
| 06/17/2009 | CN101460871A Electrical cased well-logging method |
| 06/17/2009 | CN101460699A A method and apparatus for patching a well by hydroforming a tubular metal patch, and a patch for this purpose |
| 06/17/2009 | CN100501121C Extra-low frequency or ultra-low frequency electromagnetic wave two-ways remote controlling sensing system while-drilling |
| 06/17/2009 | CN100501120C Mechanical pipe pole connecting hoop detecting apparatus for working with pressure |
| 06/16/2009 | US7548681 Prevention of optical fiber darkening |
| 06/16/2009 | US7548065 Skin depth compensation for an in-ground transmitter |
| 06/16/2009 | US7546884 Method and apparatus and program storage device adapted for automatic drill string design based on wellbore geometry and trajectory requirements |
| 06/16/2009 | CA2543877C System for logging formations surrounding a wellbore |
| 06/16/2009 | CA2538303C Downlink telemetry system |
| 06/11/2009 | WO2009073803A1 Method and apparatus for off-rig processing rig sensor data |
| 06/11/2009 | WO2009073520A1 Real-time completion monitoring with acoustic waves |
| 06/11/2009 | WO2009072091A2 Cuttings bed detection |
| 06/11/2009 | WO2003040513A3 In situ thermal processing of a hydrocarbon containing formation |
| 06/11/2009 | US20090150079 Methods and apparatus to monitor contamination levels in a formation fluid |
| 06/11/2009 | US20090146836 Methods and apparatus to configure drill string communications |
| 06/11/2009 | US20090145610 Methods of Using Enhanced Wellbore Electrical Cables |
| 06/11/2009 | US20090145603 Remote-controlled gravel pack crossover tool utilizing wired drillpipe communication and telemetry |
| 06/11/2009 | US20090145602 Cement compositions comprising crystalline organic materials and methods of using same |
| 06/11/2009 | US20090145601 Technique and apparatus to deploy a cement plug in a well |
| 06/11/2009 | US20090145600 Method for determining reservoir permeability form borehole stoneley-wave attenuation using biot's poroelastic theory |
| 06/11/2009 | US20090145599 Method System and Program Storage Device for Simulating A Multilayer Reservoir and Partially Active Elements In A Hydraulic Fracturing Simulator |
| 06/11/2009 | US20090145598 Optimization of untreated oil shale geometry to control subsidence |
| 06/11/2009 | CA2707482A1 A method for performing oilfield production operations |
| 06/11/2009 | CA2704837A1 Real-time completion monitoring with acoustic waves |
| 06/10/2009 | EP2066869A1 Estimating a formation property |
| 06/10/2009 | EP2066868A2 Improved methods and apparatus to determine vessel draft and amount of cargo loaded in a vessel |
| 06/10/2009 | EP1700138B1 Orientation sensor for mwd applications |
| 06/10/2009 | CN201254988Y Wellhead integral pressure testing apparatus |
| 06/10/2009 | CN201254987Y Horizontal long drilling on-drilling clinometer |
| 06/10/2009 | CN201254986Y Inspection beveled protractor for outburst control measure |
| 06/10/2009 | CN201254985Y Well control device data acquisition unit |
| 06/10/2009 | CN201254984Y Downhole rotating equipment and tacheometry apparatus thereof |
| 06/10/2009 | CN101454537A Drill bit assembly with a probe |
| 06/10/2009 | CN101451432A High precision digital sonic wave variable density scale method |
| 06/10/2009 | CN101451431A Pressure testing device at well mouth |
| 06/09/2009 | US7543636 Diagnostic sleeve shifting tool |
| 06/09/2009 | US7543635 Fracture characterization using reservoir monitoring devices |
| 06/09/2009 | CA2559811C Seismic measurements while drilling |
| 06/09/2009 | CA2557962C Downhole data transmission apparatus and methods |
| 06/09/2009 | CA2527751C Borehole telemetry system |
| 06/09/2009 | CA2483135C Erosion-indicating safety fitting |
| 06/09/2009 | CA2476370C Electromagnetic gap sub assembly |
| 06/09/2009 | CA2463560C Methods and systems for optical endpoint detection of a sliding sleeve valve |
| 06/09/2009 | CA2415201C Deploying a cable through a guide conduit in a well |
| 06/09/2009 | CA2401723C Wireless communication using well casing |
| 06/09/2009 | CA2335469C Non-intrusive fiber optic pressure sensor for measuring unsteady pressures within a pipe |
| 06/04/2009 | WO2009070751A1 Mud pulser actuation |
| 06/04/2009 | WO2009070667A1 Methods of identifying fluids using terahertz irradiation |
| 06/04/2009 | WO2009070049A1 Well gamma-logging method (variants) |
| 06/04/2009 | WO2009068947A2 Methods and apparatus for telemetry and power delivery |
| 06/04/2009 | WO2009068907A1 Pipe and method of determining the shape of a pipe |
| 06/04/2009 | WO2009068905A1 Flexible pipe |
| 06/04/2009 | WO2009068243A1 A visualization system for a downhole tool |
| 06/04/2009 | WO2009067786A1 Determination of formation pressure during a drilling operation |
| 06/04/2009 | WO2009067785A1 Measurements in a fluid-containing earth borehole having a mudcake |
| 06/04/2009 | WO2009048340A3 Method and system for registering and measuring leaks and flows |
| 06/04/2009 | WO2009042774A3 Apparatus and methods for continuous coring |
| 06/04/2009 | WO2008146163A3 Method of measuring a dry gas flow from. hydrocarbon wells |
| 06/04/2009 | US20090143991 Measurements in a fluid-containing earth borehole having a mudcake |
| 06/04/2009 | US20090139768 Apparatus and Methods for Continuous Tomography of Cores |
| 06/04/2009 | US20090139767 Wellbore drilling system |
| 06/04/2009 | US20090139733 Mounting of a conductor on a tubular cover |
| 06/04/2009 | US20090139724 Latch position indicator system and method |
| 06/04/2009 | US20090139713 Method and apparatus for detecting while drilling underbalanced the presence and depth of water produced from the formation |
| 06/04/2009 | US20090139322 Downhole 4d pressure measurement apparatus and method for permeability characterization |
| 06/04/2009 | US20090139321 Determination of formation pressure during a drilling operation |
| 06/04/2009 | CA2720926A1 Mud pulser actuation |
| 06/04/2009 | CA2707088A1 Downhole, single trip, multi-zone testing system and downhole testing method using such |
| 06/04/2009 | CA2706971A1 Analyzing borehole by automatically evaluating predicted borehole failure image |
| 06/03/2009 | EP2065557A1 A visualization system for a downhole tool |
| 06/03/2009 | EP2065551A2 Flexible pipe |
| 06/03/2009 | EP2064515A1 Inspection of an electrically conductive object using eddy currents |
| 06/03/2009 | EP2064413A2 Device and method for detecting an anomaly in an assembly of a first and a second object |
| 06/03/2009 | CN201250655Y Oil well productivity testing device |
| 06/03/2009 | CN201250654Y Detector for collecting, storing, recording and replaying oil well data |
| 06/03/2009 | CN101446552A Determining fluid properties from fluid analyzer |
| 06/03/2009 | CN101446194A Drilling fluid leak hunting device based on transient electromagnetic method |
| 06/03/2009 | CN101446193A Device and method for detecting coal seam gas pressure and coal wall stress |
| 06/03/2009 | CN101446192A Oil and gas wells ground wireless testing system and method |
| 06/03/2009 | CN101445211A Anti-running linked braking system of logging winch |
| 06/03/2009 | CN100494626C Slip casting diffusion test device |
| 06/02/2009 | US7540165 Downhole sorption cooling and heating in wireline logging and monitoring while drilling |
| 06/02/2009 | CA2561054C Wireless electromagnetic telemetry system and method for bottomhole assembly |
| 06/02/2009 | CA2555646C Apparatus for changing wellbore fluid temperature |
| 06/02/2009 | CA2552514C Formation evaluation system and method |
| 06/02/2009 | CA2541190C Apparatus and method for sensing downhole parameters |
| 06/02/2009 | CA2514596C Self-orienting selectable locating collet and method for location within a wellbore |
| 06/02/2009 | CA2447468C Simplified antenna structures for logging tools |
| 06/02/2009 | CA2399130C A method and apparatus for the optimal predistortion of an electromagnetic signal in a downhole communication system |
| 06/02/2009 | CA2332241C Wireless coiled tubing joint locator |
| 05/28/2009 | WO2009067373A2 Generating and updating true vertical depth indexed data and log in real time data acquisition |
| 05/28/2009 | WO2009067041A1 Method and system for evaluating the characteristic properties of two contacting media and of the interface between them based on mixed surface waves propagating along the interface |
| 05/28/2009 | WO2009067021A2 Method and device for determination of fluid inflow to a well |
| 05/28/2009 | WO2009065610A1 Autonomous wellbore navigation device |
| 05/28/2009 | WO2009065579A2 Sensor deployment |