| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 01/02/2009 | CA2636573A1 Improved spindle for mud pulse telemetry applications |
| 01/01/2009 | US20090006058 Iterative Drilling Simulation Process For Enhanced Economic Decision Making |
| 01/01/2009 | US20090006005 Method and device for on-line acoustic monitoring of foam and aerated fluid properties |
| 01/01/2009 | US20090003133 Acoustic Telemetry |
| 01/01/2009 | US20090000785 Method and Apparatus to Quantify Fluid Sample Quality |
| 12/31/2008 | WO2009002872A1 Method, system and apparatus for determining rock strength using sonic logging |
| 12/31/2008 | WO2009002702A1 Apparatus and methods to dissipate heat in a downhole tool |
| 12/31/2008 | WO2009002591A2 Method and apparatus to quantify fluid sample quality |
| 12/31/2008 | WO2009001022A1 Profiling pig for detecting and quantifying internal corrosion in pipes |
| 12/31/2008 | WO2008135167A3 Method and apparatus for measuring a parameter within the well with a plug |
| 12/31/2008 | WO2007149866A3 Active vibration control for subterranean drilling operations |
| 12/31/2008 | EP2007969A1 Methods for designing and fabricating earth-boring rotary drill bits having predictable walk characteristics and drill bits configured to exhibit predicted walk characteristics |
| 12/31/2008 | EP2007967A2 A system and method for estimating supercharge pressure and initial pressure of a formation |
| 12/31/2008 | CN201173911Y Portable steady magnetic field bore rod quality detector |
| 12/31/2008 | CN201173117Y MWD instrument flow tube spring assembly |
| 12/31/2008 | CN201173116Y Hollow seal examination sealing segment |
| 12/31/2008 | CN201173115Y Downhole pressure gage for double-deck gas well |
| 12/31/2008 | CN201173114Y Wireless directional tool adopting optical communication |
| 12/31/2008 | CN201173113Y MWD system down-hole instrument connecting apparatus |
| 12/31/2008 | CN201173112Y Multifunctional mobile metering device for oil well |
| 12/31/2008 | CN201173100Y Electric jar |
| 12/31/2008 | CN101333926A Oil gas water flow measurement system possessing automatic control device |
| 12/31/2008 | CN101333925A Oil gas water three phase on-line inseparate flow measurement system |
| 12/31/2008 | CN101333924A Oil gas water flow measurement system |
| 12/31/2008 | CA2690380A1 Apparatus and methods to dissipate heat in a downhole tool |
| 12/30/2008 | US7469745 Apparatus and method to mechanically orient perforating systems in a well |
| 12/30/2008 | CA2496170C Gap sub assembly |
| 12/30/2008 | CA2365110C Method for estimating rock petrophysical parameters using temperature modified nmr data |
| 12/25/2008 | US20080314595 Well Jet Device and the Operating Method Thereof |
| 12/25/2008 | US20080314586 Well Logging Fluid for Ultrasonic Cement Bond Logging |
| 12/25/2008 | US20080314585 System and method for making drilling parameter and or formation evaluation measurements during casing drilling |
| 12/25/2008 | US20080314582 Targeted measurements for formation evaluation and reservoir characterization |
| 12/25/2008 | US20080314579 Method and System for Inserting a Fiber Optical Sensing Cable Into an Underwater Well |
| 12/25/2008 | US20080314577 Stress, strain and fatigue measuring of well piping |
| 12/25/2008 | US20080314139 Method and apparatus for ion-selective discrimination of fluids downhole |
| 12/25/2008 | US20080314138 Optical wellbore fluid characteristic sensor |
| 12/25/2008 | US20080314137 Methods and apparatus for measuring formation properties |
| 12/25/2008 | CA2633985A1 Fluid level indication system and technique |
| 12/25/2008 | CA2632636A1 Fluid level indication system and technique |
| 12/24/2008 | WO2008157474A2 Method and apparatus for geobaric analysis |
| 12/24/2008 | WO2008157135A1 Well completion self orienting connector system |
| 12/24/2008 | WO2007115051A3 Pressure communication assembly external to casing with connectivity to pressure source |
| 12/24/2008 | EP2005221A2 Method and apparatus for sensing a borehole characteristic |
| 12/24/2008 | EP2005217A2 Method and apparatus for determining formation resistivity ahead of the bit and azimuthal at the bit |
| 12/24/2008 | CN201170094Y Antifreeze joint of oil pumping well head pressure gauge |
| 12/24/2008 | CN201170093Y Multi-point temperature pressure dynamic monitoring instrument of horizontal well |
| 12/24/2008 | CN201170092Y Oil water well automatic remote wireless monitoring apparatus |
| 12/24/2008 | CN101328803A Controlling a dynamic signal range in an optical time domain reflectometry |
| 12/24/2008 | CN101328802A Capillary pressure measuring device |
| 12/24/2008 | CN101328801A Apparatus and methods to dissipate heat in a downhole tool |
| 12/24/2008 | CN101328800A Cooling systems for downhole tools |
| 12/24/2008 | CN101328791A Method and system for accessing subterranean deposits from the surface |
| 12/24/2008 | CN101328786A Automatic grouting control method and control system of well drilling |
| 12/24/2008 | CN100445515C Controllable transceiver unit for collecting stratigraphic data in well |
| 12/24/2008 | CN100445514C Layered steam distribution system for steam flooding and steam distribution method thereof |
| 12/24/2008 | CA2685432A1 Method and apparatus for geobaric analysis |
| 12/23/2008 | US7468678 Downhole telemetry system for wired tubing |
| 12/23/2008 | CA2541291C Pump-off measurements for quality control and wellbore stability prediction |
| 12/23/2008 | CA2536455C Integral flush gauge cable apparatus and method |
| 12/23/2008 | CA2525065C Wellbores utilizing fiber optic-based sensors and operating devices |
| 12/23/2008 | CA2490477C Low frequency electromagnetic telemetry system employing high cardinality phase shift keying |
| 12/23/2008 | CA2260458C Downhole telemetry system and method for remote communication |
| 12/22/2008 | CA2632338A1 Controlling a dynamic signal range in an optical time domain reflectometry |
| 12/18/2008 | WO2008152599A2 Real time closed loop interpretation of tubing treatment systems and methods |
| 12/18/2008 | WO2008130888B1 Depth measurement by distributed sensors |
| 12/18/2008 | WO2008130852A3 Christmas tree with internally positioned flowmeter |
| 12/18/2008 | WO2008103487B1 Drilling collaboration infrastructure |
| 12/18/2008 | US20080309345 Tracking Positions of Personnel, Vehicles, and Inanimate Objects |
| 12/18/2008 | US20080308271 Deployment of Underground Sensors in Casing |
| 12/18/2008 | US20080307877 Perforation Logging Tool and Method |
| 12/18/2008 | US20080307876 Method and apparatus for geobaric analysis |
| 12/18/2008 | US20080307860 Detector for Distinguishing Phases in a Multiphase Fluid Mixture |
| 12/18/2008 | CA2687892A1 Real time closed loop interpretation of tubing treatment systems and methods |
| 12/18/2008 | CA2687737A1 Repeater for wired drill pipe |
| 12/17/2008 | EP2003287A2 Casing data relay |
| 12/17/2008 | CN201165953Y Plunger piston oil pump double control system for testing winch capstan closed type hydraulic system variable |
| 12/17/2008 | CN201165871Y High temperature and high pressure core filtering loss instrument |
| 12/17/2008 | CN201165870Y Upper hanging type positive pulse generator capable of salvaging slurry |
| 12/17/2008 | CN201165869Y Positioning apparatus of well testing instrument |
| 12/17/2008 | CN101324189A External pressure type temperature compensation high-temperature high-pressure optical fiber grating sensor |
| 12/17/2008 | CN101324188A Inner pressure type temperature compensation high-temperature high-pressure optical fiber grating sensor |
| 12/17/2008 | CN101324187A Digital recording gradient meter |
| 12/17/2008 | CN101324186A Device for measuring oil, gas, water three phase flow containing rate |
| 12/17/2008 | CN101324176A Spring self-switching type Y-shaped joint |
| 12/17/2008 | CN100443922C Downhole signal source |
| 12/16/2008 | US7466135 Boring technique using locate point measurements for boring tool depth prediction |
| 12/16/2008 | US7465426 comprises a tank, feeders, extractors, analyzer; extractors comprise an ultrasonic electroacoustic transducer and the mud feeders comprise volume and flow rate regulators that enable a preset constant volume of mud to be guaranteed in the tank and the flow rate to be adjusted to a preset constant value |
| 12/16/2008 | US7464771 Downhole abrading tool having taggants for indicating excessive wear |
| 12/16/2008 | US7464609 Means for measuring fluid flow in a pipe |
| 12/16/2008 | US7464588 Apparatus and method for detecting fluid entering a wellbore |
| 12/16/2008 | CA2500382C Measurement-while-drilling assembly using real-time toolface oriented measurements |
| 12/16/2008 | CA2386195C Obtaining an image of an underground formation |
| 12/11/2008 | WO2008149124A2 Apparatus for determining the concentration of a conductive fluid present in a fluid filled borehole |
| 12/11/2008 | WO2007112175A3 Hydraulic fracture initiation and propagation control in unconsolidated and weakly cemented sediments |
| 12/11/2008 | WO2007018877A3 Downhole uses of electroactive polymers |
| 12/11/2008 | US20080302530 Apparatus and Method for Engaging a Tubular |
| 12/11/2008 | US20080302529 Multi-zone formation fluid evaluation system and method for use of same |
| 12/11/2008 | US20080302524 Apparatus for wellbore communication |
| 12/11/2008 | DE212007000038U1 Ventilator mit Temperaturanzeige Fan with temperature display |
| 12/11/2008 | DE19745947B4 Vorrichtung und Verfahren zum Bohren von Erdformationen Apparatus and method for drilling earth formations |