| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 03/05/2009 | WO2009029821A2 Apparatus and method for estimating orientation of a liner during drilling of a wellbore |
| 03/05/2009 | WO2009029816A2 Apparatus and method for estimating orientation of a liner during drilling of a wellbore |
| 03/05/2009 | WO2009029451A1 Method and apparatus for fluid loss measurements of wellbore fluids |
| 03/05/2009 | WO2009029359A2 Tool face sensor method |
| 03/05/2009 | WO2009029067A1 Downhole wireline wireless communication |
| 03/05/2009 | WO2009026676A1 Method of measuring gas flow |
| 03/05/2009 | US20090063054 Method and System for Controlling a Well Service Rig Based on Load Data |
| 03/05/2009 | US20090059722 Wired Pipe Depth Measurement System |
| 03/05/2009 | US20090059332 System and method for dual path length optical analysis of fluids downhole |
| 03/05/2009 | US20090056949 Fluorescence measurement system for detecting leaks from subsea systems and structures |
| 03/05/2009 | US20090056938 Apparatus And Method For Estimating Orientation Of A Liner During Drilling Of A Wellbore |
| 03/05/2009 | US20090056936 Subsea Structure Load Monitoring and Control System |
| 03/05/2009 | US20090056434 Method and apparatus for determining fluid content downhole |
| 03/05/2009 | CA2699330A1 Method and apparatus for well-bore proximity measurement while drilling |
| 03/05/2009 | CA2694732A1 Method of measuring gas flow |
| 03/04/2009 | WO2010024802A1 Method and system of processing gamma count rate decay curves using neural networks |
| 03/04/2009 | EP2029854A2 Downhole formation testing sensors |
| 03/04/2009 | CN201202472Y 60 arm borehole diameter imaging logger |
| 03/04/2009 | CN201202471Y Apparatus for preventing gas seepage into pressure meter |
| 03/04/2009 | CN201202470Y Sheathed thermocouple temperature measuring system |
| 03/04/2009 | CN201202469Y Depth checking type temperature pressure tester of thermal extraction horizontal well |
| 03/04/2009 | CN201202468Y Layered mark bottom |
| 03/04/2009 | CN201202467Y Continuous injecting apparatus of oil well horizontal segment test cable |
| 03/04/2009 | CN201202466Y Suspension type corrosion monitoring apparatus of gas well downhole oil conduit |
| 03/04/2009 | CN201202465Y Layered test flowmeter vibration damper |
| 03/04/2009 | CN201202464Y Ground system operation console of well logging instrument |
| 03/04/2009 | CN201202463Y Well washing movable metering device of water injection well |
| 03/04/2009 | CN201202462Y Oil well operating condition monitoring apparatus |
| 03/04/2009 | CN101377127A Method for testing horizontal well oil conduit transportation under pumping state |
| 03/04/2009 | CA2701109A1 Method and system of processing gamma count rate decay curves using neural networks |
| 03/03/2009 | US7497276 Method and apparatus for collecting drill bit performance data |
| 03/03/2009 | CA2541077C Method and conduit for transmitting signals |
| 03/03/2009 | CA2362041C Method of locating a cementing plug in a subterranean well |
| 03/03/2009 | CA2340534C Field development system and associated methods |
| 02/28/2009 | CA2638532A1 Flow control device and method for a downhole oil-water separator |
| 02/26/2009 | WO2009024939A2 Creep determination technique |
| 02/26/2009 | WO2009024545A1 Method for controlling production and downhole pressures of a well with multiple subsurface zones and/or branches |
| 02/26/2009 | WO2008133633A9 Wireless telemetry repeater systems and methods |
| 02/26/2009 | US20090055029 Real-time onsite internet communication with well manager for constant well optimization |
| 02/26/2009 | US20090050370 Steering Device For Downhole Tools |
| 02/26/2009 | CA2692996A1 Method for controlling production and downhole pressures of a well with multiple subsurface zones and/or branches |
| 02/25/2009 | EP2027364A2 Drilling fluid flow diverter |
| 02/25/2009 | EP2027363A1 In-borehole gas monitor apparatus and method |
| 02/25/2009 | CN201198756Y Block type two-way seal testing instrument |
| 02/25/2009 | CN201198755Y Storage direct-reading electronic pressure gauge |
| 02/25/2009 | CN101372890A Creep determination technique |
| 02/24/2009 | US7495995 Method and apparatus for investigating a borehole with a caliper |
| 02/24/2009 | US7495446 Formation evaluation system and method |
| 02/24/2009 | US7495445 Flux orientation locating in a drilling system |
| 02/24/2009 | CA2550161C Apparatus, pumping systems incorporating same, and methods of protecting pump components |
| 02/24/2009 | CA2542679C Apparatus and methods for logging a well borehole with controllable rotating instrumentation |
| 02/24/2009 | CA2351176C Apparatus for measuring downhole drilling efficiency parameters |
| 02/19/2009 | WO2009023852A2 Apparatus and methods for pulse testing a formation |
| 02/19/2009 | WO2009023806A1 Viscometer for downhole pumping |
| 02/19/2009 | WO2009023698A2 Downhole gas detection in drilling muds |
| 02/19/2009 | WO2009022095A1 Methods and systems of installing cable for measurement of a physical parameter |
| 02/19/2009 | WO2009002702A4 Apparatus and methods to dissipate heat in a downhole tool |
| 02/19/2009 | WO2007008876A3 Automatic adjustment of nmr pulse sequence to optimize snr based on real time analysis |
| 02/19/2009 | US20090047181 Determining fluid chemistry of formation fluid by downhole reagent injection spectral analysis |
| 02/19/2009 | US20090045075 Electrical cased well-logging method |
| 02/19/2009 | US20090044939 Downhole tool |
| 02/19/2009 | US20090044938 Smart motor controller for an electrical submersible pump |
| 02/19/2009 | US20090044937 Remote actuation of downhole tools using fluid pressure from surface |
| 02/19/2009 | US20090044617 Downhole gas detection in drilling muds |
| 02/18/2009 | EP2025863A1 A subsurface formation monitoring system and method |
| 02/18/2009 | EP2025861A2 Remote actuation of downhole tools using fluid pressure from surface |
| 02/18/2009 | EP2024601A1 A method and apparatus for patching a well by hydroforming a tubular metal patch, and a patch for this purpose |
| 02/18/2009 | EP1573170B1 Method and system for circulating fluid in a well system |
| 02/18/2009 | CN201196623Y Portable rock formation video monitoring image sensor |
| 02/18/2009 | CN201196090Y Fast connecting apparatus used for sound insulation |
| 02/18/2009 | CN201196089Y Communication circuit used for down-hole instrument |
| 02/18/2009 | CN201196088Y High-speed data transmission apparatus used for petroleum logging |
| 02/18/2009 | CN201196087Y Detection apparatus of hole diameter sensor |
| 02/18/2009 | CN201196086Y Well-temperature early warning controller |
| 02/18/2009 | CN201196085Y High pressure pipeline heating mechanism for oil test |
| 02/18/2009 | CN201196084Y Block-resistant connector of pressure meter |
| 02/18/2009 | CN201196083Y Oil, gas and water three-phase on-line non-separation flux measurement system |
| 02/18/2009 | CN201196082Y Oil gas water flow measurement system with automatic control apparatus |
| 02/18/2009 | CN201196081Y Oil gas water flow measurement system |
| 02/18/2009 | CN201196080Y Three-phase flow meter |
| 02/18/2009 | CN201196079Y Condensation gas flux measuring system |
| 02/18/2009 | CN201196078Y Friction force reinforced logging cable clamper |
| 02/18/2009 | CN201196077Y Automatic pressure testing apparatus of well completion oil tube column |
| 02/18/2009 | CN201196076Y Ultrasound flow meter for oil field high pressure water injection |
| 02/18/2009 | CN201196075Y Non-gas thick oil metering installation |
| 02/18/2009 | CN201196074Y Simulation oil well blowout apparatus |
| 02/18/2009 | CN201196073Y Annulus logging pulley apparatus |
| 02/18/2009 | CN101368477A Oil-water interface inspection and control method |
| 02/18/2009 | CN101368472A Method for accurately positioning and orienting drill hole of top arch |
| 02/17/2009 | US7492279 System for managing borehole information |
| 02/17/2009 | US7490664 Drilling, perforating and formation analysis |
| 02/17/2009 | US7490507 Method for determining the movement of a blast movement monitor and associated rock as a result of blasting operations |
| 02/17/2009 | CA2361263C Communicating with a downhole tool |
| 02/17/2009 | CA2323042C Apparatus and method for protecting devices, especially fibre optic devices, in hostile environments |
| 02/16/2009 | CA2635306A1 Remote actuation of downhole tools using fluid pressure from surface |
| 02/12/2009 | WO2009020889A1 Through-mill wellbore optical inspection and remediation apparatus and methodology |
| 02/12/2009 | WO2009019550A2 Method and apparatus for downlink communication using dynamic threshold values for detecting transmitted signals |
| 02/12/2009 | US20090039889 Removing effects of near surface geology from surface-to-borehole electromagnetic data |
| 02/12/2009 | US20090039876 Apparatus Detecting Relative Body Movement |
| 02/12/2009 | US20090038851 Spindle for mud pulse telemetry applications |