| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 01/30/2013 | CN202707038U Device for measuring oil well depth through steel wires |
| 01/30/2013 | CN202707037U Azimuth angle measurement instrument |
| 01/30/2013 | CN202707036U Drilling tool passing storage type logging instrument releaser |
| 01/30/2013 | CN202707035U Wellhead cable protective flange |
| 01/30/2013 | CN202707034U Underground anti-winding eccentric locator for testing cable |
| 01/30/2013 | CN202707033U Sand filling model tube |
| 01/30/2013 | CN202707032U Logging instrument plug contact pin test tool |
| 01/30/2013 | CN202707005U Logging oil fishing vehicle |
| 01/30/2013 | CN102906370A Spectroscopic nanosensor logging systems and methods |
| 01/30/2013 | CN102900431A Plugging simulation experiment device for horizontal well |
| 01/30/2013 | CN102900430A Pumping pressure interference elimination method for drilling fluid continuous pressure wave signals |
| 01/30/2013 | CN102900429A Device and method for inspecting gas drainage hole tightness |
| 01/30/2013 | CN102900428A Device and method for detecting sealing quality and gas-leakage position of coal seam gas extraction drill-hole |
| 01/30/2013 | CN102900427A Double-tracing thin layer recognizer |
| 01/30/2013 | CN102900426A Device for monitoring working parameters of remote measuring type oil testing underground pipe column in real time |
| 01/30/2013 | CN102900425A New method for monitoring shale gas well fractures |
| 01/30/2013 | CN102900424A Device for testing transmission and attenuation characteristics of acoustic waves in drill-string channel |
| 01/30/2013 | CN102900423A Gel-based solid physical simulator for electrical logging detector and forming method of gel-based solid physical simulator |
| 01/30/2013 | CN102900422A Underground flow tester and underground flow testing method |
| 01/30/2013 | CN102071926B Method and device for measuring full-hole annular pressure and method and device for controlling same |
| 01/30/2013 | CN101761332B Up-running-proof pipe string sealing check device |
| 01/30/2013 | CN101403296B Delamination pressure testing method for oil well without stop production |
| 01/29/2013 | US8364406 Multiple distributed sensors along a drillstring |
| 01/29/2013 | US8360147 Location-and-rotation feedback tool for subsea wellheads and method of operating same |
| 01/29/2013 | US8360146 Method for reservoir fracture and cross beds detection using tri-axial/multi-component resistivity anisotropy measurements |
| 01/29/2013 | CA2469363C Methods, apparatus, and systems for obtaining formation information utilizing sensors attached to a casing in a wellbore |
| 01/28/2013 | CA2783967A1 Neutron porosity measurement devices with semiconductor neutron detection cells and methods |
| 01/24/2013 | WO2013012832A2 Adaptive pump control for positive displacement pump failure modes |
| 01/24/2013 | WO2013012642A2 Distributed temperature sensing with background filtering |
| 01/24/2013 | WO2013012629A1 Apparatus and method for determining formation density from nuclear density measurements made using sensors at more than one location |
| 01/24/2013 | WO2013011130A1 Equipment and methods for deploying line in a wellbore |
| 01/24/2013 | WO2012119092A3 Synthetic formation evaluation logs based on drilling vibrations |
| 01/24/2013 | WO2012007556A3 Process for backfilling a borehole and arrangement therefor |
| 01/24/2013 | WO2011117355A3 Method and apparatus for determining the nature of a material in a cavity between one inner metal wall and one outer metal wall |
| 01/24/2013 | US20130024122 Formation fluid detection |
| 01/24/2013 | US20130020131 Method of developing a petroleum reservoir from a technique for selecting the positions of the wells to be drilled |
| 01/24/2013 | US20130020130 Drill Bits With Sensors for Formation Evaluation |
| 01/24/2013 | US20130020129 Methods for directing vertical drilling |
| 01/24/2013 | US20130020075 Pulsed Neutron Monitoring of Hydraulic Fracturing and Acid Treatment |
| 01/24/2013 | US20130020074 Apparatus and method for filtering data influenced by a downhole pump |
| 01/24/2013 | US20130019672 Autonomous Formation Pressure Test Process for Formation Evaluation Tool |
| 01/24/2013 | CA2841777A1 Distributed temperature sensing with background filtering |
| 01/23/2013 | EP2549056A1 Subsea communication system |
| 01/23/2013 | CN202694841U Reinforced type electric cable for oil field downhole |
| 01/23/2013 | CN202694840U Logging cable |
| 01/23/2013 | CN202694838U Testing cable for oil field downhole |
| 01/23/2013 | CN202692068U Whirlwind burner |
| 01/23/2013 | CN202690042U Pressure balance bunker device of hydraulic pushing instrument |
| 01/23/2013 | CN202690041U Device used for location and protection of probe of rock stratum detection recording meter |
| 01/23/2013 | CN202690038U Sector cementing well measuring instrument |
| 01/23/2013 | CN202690037U Pressure testing device for well control and wellhead equipment |
| 01/23/2013 | CN202690036U High-temperature and high-pressure leakage-plugging test device for leakage of drilling liquid |
| 01/23/2013 | CN202690035U Well-drilling drill position monitoring device |
| 01/23/2013 | CN202690034U Optical fiber monitoring system for underground temperature and pressure |
| 01/23/2013 | CN202690033U Continuous steel tube and sheath testing cable |
| 01/23/2013 | CN202690032U Double-point sensor carrier |
| 01/23/2013 | CN202690031U Shell for measuring-while-drilling instrument |
| 01/23/2013 | CN202690030U Seal hooping device for leather bag |
| 01/23/2013 | CN202690029U Cubic meter measurement tank of three-low well |
| 01/23/2013 | CN202690022U IP (Internet Protocol) water injection instrument |
| 01/23/2013 | CN102892970A Methods and systems for drilling |
| 01/23/2013 | CN102889079A Acoustic logging transmitting transducer driving system |
| 01/23/2013 | CN102889078A Time difference positioning system and method for deep well drill bit position |
| 01/23/2013 | CN102889077A Testing device for detecting pressure distribution in hole by simulating hydra-jet fracturing under actual working conditions |
| 01/23/2013 | CN102889076A Method for calibrating gyro inclinometer |
| 01/23/2013 | CN102889075A Coal mine drilling angle measuring system and method |
| 01/23/2013 | CN102889074A Pipeline transmission perforation explosion monitoring method |
| 01/23/2013 | CN102889073A Device and method for monitoring drilling working state of drilling machine |
| 01/23/2013 | CN102003173B System and method for automatically measuring and recording gas pressure during coal seam hole sealing |
| 01/23/2013 | CN101832131B Surface real-time processing of downhole data |
| 01/23/2013 | CN101705812B Large-discharge single pipe layered polymer injection and injection allocation method and device |
| 01/23/2013 | CN101660406B Memory-type pressure acquisition system and oil well pressure acquisition method thereof |
| 01/23/2013 | CN101581215B Collector capable of automatically controlling gas separation for measuring production profile of oil well |
| 01/23/2013 | CN101515039B Underground power supply and signal transmission system |
| 01/22/2013 | US8356673 Down-hole transmitter system, method of inducing a transient electromagnetic field in an earth formation, method of obtaining a transient electromagnetic response signal, and method of producing a hydrocarbon fluid |
| 01/22/2013 | CA2779776A1 Autonomous formation pressure test process for formation evaluation tool |
| 01/22/2013 | CA2692929C Method and apparatus for downlink communication using dynamic threshold values for detecting transmitted signals |
| 01/22/2013 | CA2661908C Pressure waves decoupling with two transducers |
| 01/19/2013 | CA2783423A1 Downhole telemetry signalling apparatus |
| 01/19/2013 | CA2746875A1 Downhole telemetry signalling apparatus |
| 01/18/2013 | CA2782921A1 At-bit magnetic ranging and surveying |
| 01/17/2013 | WO2013009932A2 Reducing fluid capacitance and conductance effects on piezoelectric resonator measurements |
| 01/17/2013 | WO2013009895A1 Encapsulated tracers and chemicals for reservoir interrogation and manipulation |
| 01/17/2013 | WO2013009847A2 Smart drop-off tool and hang-off tool for a logging string |
| 01/17/2013 | WO2013009801A2 Estimating a wellbore parameter |
| 01/17/2013 | WO2013009515A1 Depth/orientation detection tool and methods thereof |
| 01/17/2013 | WO2013009512A2 Method for simulating fractional multi-phase/multi-component flow through porous media |
| 01/17/2013 | WO2013009501A2 Cnt fiber based impedance spectroscopy for characterizing downhole fluids |
| 01/17/2013 | WO2013009389A1 Estimating Fluid Levels in a Progressing Cavity Pump System |
| 01/17/2013 | WO2013009305A1 Formation testing in managed pressure drilling |
| 01/17/2013 | WO2013009173A1 A telemetry system, a pipe and a method of transmitting information |
| 01/17/2013 | WO2013008035A2 Method of acoustic surveying |
| 01/17/2013 | WO2013007739A1 Positioning method |
| 01/17/2013 | WO2012161961A3 Verification of swelling in a well |
| 01/17/2013 | WO2012145528A3 Arcnet use in downhole equipment |
| 01/17/2013 | WO2012083210A3 Gas detection and quantification method using a pulsed neutron logging tool |
| 01/17/2013 | WO2012064944A3 Drilling control system and method |
| 01/17/2013 | US20130014994 Systems and methods of a sample bottle assembly |
| 01/17/2013 | US20130014993 Formation testing in managed pressure drilling |
| 01/17/2013 | US20130014992 Data Transfer In A Two-Pipe Directional Drilling System |