| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 08/07/2013 | CN203114269U Sliding sleeve type negative pressure testing device |
| 08/07/2013 | CN203114268U Production logger |
| 08/07/2013 | CN203114267U Concentric and intelligent water distribution test modification downhole instrument |
| 08/07/2013 | CN203114266U Signal collecting and processing system for ground logger |
| 08/07/2013 | CN203114262U Measurement regulation communication integration type water distributor |
| 08/07/2013 | CN203114235U Adjustable polymer flooding underground blanking plug |
| 08/07/2013 | CN203114227U Testable oil jacket sealing antitheft device for oil well |
| 08/07/2013 | CN103237956A Wireless communication between tools |
| 08/07/2013 | CN103237955A Systems and methods for defining hydrocarbon pay zone definition in a subterranean reservoir |
| 08/07/2013 | CN103236845A Method for compacting data transmitted with drilling well mud pulse |
| 08/07/2013 | CN103233725A Device and method for determining high temperature and high pressure full diameter core mud pollution evaluation |
| 08/07/2013 | CN103233724A Sound source exciting device for acoustic logging while drilling |
| 08/07/2013 | CN103233723A Small-diameter electromagnetic flow comprehensive logging instrument |
| 08/07/2013 | CN103233722A Coal mine underground explosion proof type electromagnetic wave wireless measurement while drilling system and application method thereof |
| 08/07/2013 | CN103233721A Beam pumping machine ground mechanical system dynamic location method and device |
| 08/07/2013 | CN103233720A System and method for monitoring hydraulic fractures based on magnetic support agents |
| 08/07/2013 | CN103233719A Pithead return pressure determination method for suppressing sudden expansion of acid gas |
| 08/07/2013 | CN103233689A Wellhead hydraulic blowout prevention pipe lifting device |
| 08/06/2013 | US8499831 Mud cake probe extension apparatus and method |
| 08/06/2013 | US8499830 Method to detect casing point in a well from resistivity ahead of the bit |
| 08/06/2013 | US8499828 Monitoring fluid movement in a formation |
| 08/06/2013 | CA2726695C Telemetry wave detection apparatus and method |
| 08/06/2013 | CA2683994C System and method for water breakthrough detection and intervention in a production well |
| 08/06/2013 | CA2510212C Method and system to deploy control lines |
| 08/01/2013 | WO2013113039A1 Autonomous system for hydrofracture monitoring |
| 08/01/2013 | WO2013113009A1 Wellbore fluids incorporating magnetic carbon nanoribbons and magnetic functionalized carbon nanoribbons and methods of using the same |
| 08/01/2013 | WO2013112827A1 Method of estimating a subterranean formation property |
| 08/01/2013 | WO2013112822A1 Multi-pair power distribution |
| 08/01/2013 | WO2013112674A2 Systems, methods, and devices for monitoring wellbore conditions |
| 08/01/2013 | WO2013112398A1 System and method for generation of alerts and advice from automatically detected borehole breakouts |
| 08/01/2013 | WO2013112365A1 Indicator and method of verifying a tool has reached a portion of a tubular |
| 08/01/2013 | WO2013112294A1 System and method for removing deleterious chemicals from a fiber optic line |
| 08/01/2013 | WO2013112273A2 Downhole robots and methods of using same |
| 08/01/2013 | WO2013110542A1 Wellbore positioning system and method |
| 08/01/2013 | WO2013110197A1 Core barrel valve assembly |
| 08/01/2013 | WO2013074745A3 Methods for geosteering a drill bit in real time using drilling acoustic signals |
| 08/01/2013 | WO2012148902A3 Hybrid transponder system for long-range sensing and 3d localization |
| 08/01/2013 | WO2012148890A3 Methods of employing and using a hybrid transponder system for long-range sensing and 3d localization |
| 08/01/2013 | WO2012037390A3 Expandable tubular antenna feed line for through casing e/m communication |
| 08/01/2013 | US20130197808 Methods And Apparatus For Characterization Of Hydrocarbon Reservoirs |
| 08/01/2013 | US20130192897 Downhole Tool Activation |
| 08/01/2013 | US20130192823 Systems, methods, and devices for monitoring wellbore conditions |
| 08/01/2013 | US20130192821 Monitoring fiber for a machine and method of installation |
| 08/01/2013 | US20130192360 Systems, methods and devices for analyzing drilling fluid |
| 08/01/2013 | DE112009002653T5 Verfahren und Vorrichtung zum Planen und dynamischen Aktualisieren von Probennahmevorgängen während des Bohrens in einer unterirdischen Formation Method and apparatus for scheduling and dynamic updating of sampling operations during drilling in a subterranean formation |
| 08/01/2013 | CA2861963A1 Core barrel valve assembly |
| 08/01/2013 | CA2861648A1 Downhole robots and methods of using same |
| 07/31/2013 | EP2619414A1 Contactless data communications coupling |
| 07/31/2013 | CN203101683U Well-logging sensor connector packaging apparatus suitable for temperature of 300 DEG and pressure of 50MPa |
| 07/31/2013 | CN203098842U Acoustic logging while drilling sensor sealing device |
| 07/31/2013 | CN203097890U Dynamic monitoring instrument for parameters of liquid in shaft |
| 07/31/2013 | CN203097884U Sound wave digital receiver for well logging |
| 07/31/2013 | CN203097883U Ultralow frequency power transmitting device |
| 07/31/2013 | CN203097882U High-precise pressure gauge for underground data collecting |
| 07/31/2013 | CN203097881U Wellhead wireless pressure transmitter |
| 07/31/2013 | CN203097880U Wellhead pressure transmitter |
| 07/31/2013 | CN203097879U Inflow dynamic two-dimensional visible simulation device of horizontal well and straight well |
| 07/31/2013 | CN203097878U Auxiliary ground control cabinet for downhole temperature and pressure measurement |
| 07/31/2013 | CN203097877U Logging-while-drilling instrument probe inspecting and testing device |
| 07/31/2013 | CN203097876U Double-heat exchange non-inductive hot air circulation oven |
| 07/31/2013 | CN203097875U Optical cable fixing protector for oil and gas well casing string stress test |
| 07/31/2013 | CN203097874U Well cementation cement sheath performance simulation experiment device |
| 07/31/2013 | CN203097873U Viewing device of deep well detector |
| 07/31/2013 | CN203097872U Video recording instrument for roadway roof drill hole |
| 07/31/2013 | CN203097871U Pole plate electrode system for logging instrument and pole plate assembly for logging instrument |
| 07/31/2013 | CN203097870U Rolling ball type logging winch slip ring |
| 07/31/2013 | CN203097869U Portable single port measuring device for gas drainage drilling hole |
| 07/31/2013 | CN203097868U Umbrella type flow collector with double flow collection degrees |
| 07/31/2013 | CN203097867U Vibration and rotating speed measuring device |
| 07/31/2013 | CN203097866U Sealing outer shell for oil well downhole detecting device |
| 07/31/2013 | CN203097865U Oil well digitalized metering pry not influenced by environment temperature |
| 07/31/2013 | CN203097864U Complex structural well shaft oil-gas-water three-phase fluid mass-variable flow simulating device |
| 07/31/2013 | CN203097863U Telemetering type real-time monitoring device for working parameters of formation testing down-hole string |
| 07/31/2013 | CN203097838U Oil and gas well producing test manifold device |
| 07/31/2013 | CN203097716U Combined drill column device for drilling of directional well |
| 07/31/2013 | CN103228861A Downhole system having a wireless unit |
| 07/31/2013 | CN103225505A High-speed slurry pulse generator |
| 07/31/2013 | CN103225504A Measuring probe for high-viscosity mixed fluid characteristics |
| 07/31/2013 | CN103225503A High-pressure examining seal instrument with function of separated layer water injection |
| 07/31/2013 | CN103225502A System for measuring hole diameter and method thereof |
| 07/31/2013 | CN103225501A Method of quantitatively evaluating eccentricity of while-drilling instrument with acoustic logging information |
| 07/31/2013 | CN103225500A Novel water flooding layer logging evaluation method applying three parameters self-consistent iterative algorithm |
| 07/31/2013 | CN103225499A System and method for analyzing working condition of water injection well in oil field |
| 07/31/2013 | CN102226392B Multi-parameter monitoring device of oil well and working method thereof |
| 07/31/2013 | CN102168552B Automatic air gun for measuring oil well liquid level |
| 07/31/2013 | CN102140912B Underground monitoring device of intelligent well |
| 07/31/2013 | CN102121377B Pressure-while-drilling measuring device and measurement method thereof |
| 07/31/2013 | CN101845943B Universal packer for through cable |
| 07/31/2013 | CN101793129B Drilling rig endoscope motor cable-fixing device |
| 07/31/2013 | CN101705814B Advancing direction measurement method of vertical and slant orepasses |
| 07/31/2013 | CN101592031B A combined propagation and lateral resistivity downhole tool |
| 07/30/2013 | US8496053 Erosional protection of fiber optic cable |
| 07/30/2013 | CA2648698C Method and apparatus for determining formation resistivity ahead of the bit and azimuthal at the bit |
| 07/30/2013 | CA2570058C Closed loop control system for controlling production of hydrocarbon fluid from an underground formation |
| 07/26/2013 | CA2786471A1 Sealed and hydrostatically lockable retrievable mwd landing system |
| 07/25/2013 | WO2013109847A1 Interference reduction method for downhole telemetry systems |
| 07/25/2013 | WO2013109574A1 Carbon dioxide content of natural gas from other physical properties |
| 07/25/2013 | WO2013109573A1 Apparatus including strain gauges for estimating downhole string parameters |
| 07/25/2013 | WO2013109539A2 Well completion apparatus, system and method |
| 07/25/2013 | WO2013109285A1 Pressure pulse-initiated flow restrictor bypass system |