| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 06/25/2013 | US8472282 Method and apparatus for acoustic data transmission in a subterranean well |
| 06/25/2013 | US8471556 Magnetic probe and processes of analysis |
| 06/25/2013 | US8469119 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 06/25/2013 | US8469090 Method for monitoring hydrocarbon production |
| 06/25/2013 | CA2677881C Signal processing in downhole equipment |
| 06/25/2013 | CA2546398C Apparatus and method for measuring while drilling |
| 06/25/2013 | CA2529173C Determination of the impedance of a material behind a casing combining two sets of ultrasonic measurements |
| 06/25/2013 | CA2437395C Apparatuses and methods for deploying logging tools and signalling in boreholes |
| 06/22/2013 | CA2767538A1 Hydrocarbon well performance monitoring system |
| 06/21/2013 | CA2799809A1 Method and apparatus for interrogating a subterranean annulus |
| 06/20/2013 | WO2013090578A1 Fine control of casing pressure |
| 06/20/2013 | WO2013090483A1 Combining inelastic and capture gamma ray spectroscopy for determining formation elemental weight fractions |
| 06/20/2013 | WO2013090399A1 Apparatus and methods for determining parameters downhole using gravity-affected sensor |
| 06/20/2013 | WO2013090240A1 Utilization of dynamic downhole surveying measurements |
| 06/20/2013 | WO2013089941A1 Controlled electrolytic degradation of downhole tools |
| 06/20/2013 | WO2013089691A1 Mitigation of hydrates, paraffins and waxes in well tools |
| 06/20/2013 | WO2013087825A1 Method of controlling a downhole operation |
| 06/20/2013 | WO2013086623A1 Horizontal and vertical well fluid pumping system |
| 06/20/2013 | WO2012156730A3 Determining whether a wellbore sealing operation has been performed correctly |
| 06/20/2013 | WO2012094626A3 Test packer and method for use |
| 06/20/2013 | WO2012089995A3 Cone and plate fluidic oscillator inserts for use with a subterranean well |
| 06/20/2013 | WO2012089994A3 Cross-flow fluidic oscillators for use with a subterranean well |
| 06/20/2013 | WO2012042353A3 Imaging methods and systems for downhole fluid analysis |
| 06/20/2013 | US20130158875 Production logging tool and method for analyzing a produced fluid |
| 06/20/2013 | US20130154845 Mud Pulse Telemetry Noise Reduction Method |
| 06/20/2013 | US20130153299 Establishing positions of locating field detectors and path mapping in underground boring tool applications |
| 06/20/2013 | US20130153298 Method and apparatus for enhancing cell-edge user performance and signaling radio link failure conditions via downlink cooperative component carriers |
| 06/20/2013 | US20130153216 Recovery From A Hydrocarbon Reservoir |
| 06/20/2013 | US20130153215 Recovery From A Hydrocarbon Reservoir |
| 06/20/2013 | US20130153213 Wear sensor for a pipe guide |
| 06/20/2013 | US20130153212 Speed activated closure assembly in a tubular and method thereof |
| 06/20/2013 | US20130153206 Apparatus and methods for determining parameters downhole using gravity-affected sensor |
| 06/20/2013 | DE102011121114A1 Geophysical and/or geo-technical borehole probe for use in mines for seismic inspection, has liquid-sensitive component arranged in borehole, and sealing agent outlet for discharging sealing agent into surroundings of component and/or probe |
| 06/20/2013 | CA2857752A1 Method of controlling a downhole operation |
| 06/20/2013 | CA2857123A1 Controlled electrolytic degradation of downhole tools |
| 06/20/2013 | CA2854211A1 Apparatus and methods for determining parameters downhole using gravity-affected sensor |
| 06/20/2013 | CA2823495A1 Horizontal and vertical well fluid pumping system |
| 06/19/2013 | EP2605049A1 Method for detecting gas outflow from an underground gas storage layer by means of pressure monitoring, and an underground gas storage system |
| 06/19/2013 | EP2604789A1 Method of controlling a downhole operation |
| 06/19/2013 | EP2603664A2 Method and apparatus for measuring fluid process variable in a well |
| 06/19/2013 | CN203011381U Transmission short section of gyro inclinometer |
| 06/19/2013 | CN203011380U Multifunctional gyro balancing machine |
| 06/19/2013 | CN203008895U Signal transmission device used for coal-bed gas well detected signals |
| 06/19/2013 | CN203008894U Cable-free layered test instrument for injection-production profile of oil-water well |
| 06/19/2013 | CN203008893U Automatic control working fluid level detection instrument |
| 06/19/2013 | CN203008892U Oil field downhole video storage device |
| 06/19/2013 | CN203008891U Tower type test platform used for induction log instrument experiment |
| 06/19/2013 | CN203008890U Portable quick piston moving device |
| 06/19/2013 | CN203008889U Analog device for obtaining drilling parameter in managed pressure drilling |
| 06/19/2013 | CN203008888U Line-passing type sand prevention flow meter |
| 06/19/2013 | CN203008887U Isolating and weak signal preprocessing circuit of two-dimensional nuclear magnetic resonance logger |
| 06/19/2013 | CN203008852U Oilfield metering multi-way valve |
| 06/19/2013 | CN203008838U Dual-tubing and dual-suspension wellhead |
| 06/19/2013 | CN203008782U Device for analyzing and displaying drilling parameters of drill truck |
| 06/19/2013 | CN103161457A Experimental device of two-dimensional (2D) visualization slab model |
| 06/19/2013 | CN103161453A Method for optimizing oil well acquisition indicator diagram storing mode |
| 06/19/2013 | CN103161452A Two-dimension microcosmic visualization experiment simulating device and use method thereof |
| 06/19/2013 | CN103161451A Full-automatic discrete type drill rod diameter non-contact static-dynamic measurement instrument |
| 06/19/2013 | CN103161450A Automatic detection device for oil casing |
| 06/19/2013 | CN103161449A Experimental device and measurement method for ice layer rotary drilling cutting heat and drilling parameters |
| 06/19/2013 | CN103161448A Diaphragm balanced floating body temperature sensor |
| 06/19/2013 | CN103161447A Method of conducting bedding pressure measuring through directional drilling |
| 06/19/2013 | CN103161446A Oilfield production air pressure monitoring system |
| 06/19/2013 | CN103161445A Drill hole wireless inclinometer of slewing drilling machine |
| 06/19/2013 | CN103161444A Measuring method of relative direction |
| 06/19/2013 | CN103161443A Detection and sealing integrated method and device for gas extraction drill hole |
| 06/19/2013 | CN103161442A Automatic acquisition system of original data in coal-mine underground measurement |
| 06/19/2013 | CN103161441A Impression block used for well repairing and fishing procedures |
| 06/19/2013 | CN103161438A Tubular column of perforation fracturing test system |
| 06/19/2013 | CN103161436A Well test interpretation method of horizontal well for thickened oil thermal recovery |
| 06/19/2013 | CN103161435A Well test interpretation method of vertical well for thickened oil thermal recovery |
| 06/19/2013 | CN102268986B Shaft bottom parameter measuring device |
| 06/19/2013 | CN102226377B Drill string equipped with downhole blowout preventer and working method thereof |
| 06/19/2013 | CN102191933B Process for measuring and controlling produced gas of coal bed gas well |
| 06/19/2013 | CN102168548B Exploitation measuring device and method of coal bed gas well |
| 06/19/2013 | CN102116147B Slip ring for oil drilling tool |
| 06/19/2013 | CN102041995B System for monitoring complicated oil deposit flooding conditions |
| 06/19/2013 | CN101949285B Screen pipe completed well gel-breaking tester |
| 06/19/2013 | CN101942987B Simple sonic logger detection, calibration and ruling method |
| 06/19/2013 | CN101725343B Ground device for separated layer water injection |
| 06/19/2013 | CN101699028B System for controlling positioning arm of logging tool |
| 06/19/2013 | CN101446196B Well test analysis method and device of treble medium oil pool branch horizontal well |
| 06/19/2013 | CN101408095B Electrically activating a jarring tool |
| 06/19/2013 | CN101392642B Underground data wireless transmission method of gas drilling while drilling |
| 06/18/2013 | US8467268 Pressure release encoding system for communicating downhole information through a wellbore to a surface location |
| 06/18/2013 | US8467050 Apparatus and method for metering flare gas |
| 06/18/2013 | US8464791 Arm system for logging a wellbore and method for using same |
| 06/18/2013 | US8464790 Brine salinity from sound speed |
| 06/18/2013 | US8464784 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 06/18/2013 | US8464582 Variable throat venturi flow meter having a plurality of section-varying elements |
| 06/18/2013 | US8464581 Passive monitoring system for a liquid flow |
| 06/18/2013 | CA2744813C Signal propagation across gaps |
| 06/18/2013 | CA2701885C Bore-hole jet device for formation hydraulic fracturing and horizontal well examination and a method for the operation thereof |
| 06/13/2013 | WO2013086326A1 Positioning system and method for automated alignment and connection of components |
| 06/13/2013 | WO2013085616A2 Removal of fracture-induced anisotropy from converted-wave seismic amplitudes |
| 06/13/2013 | WO2013085521A1 Permeability prediction systems and methods using quadratic discriminant analysis |
| 06/13/2013 | WO2013085479A1 Method for interpretation of downhole flow measurement during wellbore treatments |
| 06/13/2013 | WO2013085408A1 Method for measuring the temperature distribution in a buried electrical power supply cable and device for implementing same |
| 06/13/2013 | WO2013057247A3 Identifying forces in a well bore |
| 06/13/2013 | WO2013052891A3 Downhole species selective optical fiber sensor systems and methods |