| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 02/14/2008 | US20080035334 Method and system for interpreting tubing data |
| 02/14/2008 | US20080035333 Method and system for scanning tubing |
| 02/14/2008 | US20080035332 Non-Conductive and Non-Magnetic Flowline for Electromagnetic Measurements on Reservoir Fluids at High Pressures |
| 02/14/2008 | US20080035324 Integrated measurement based on an optical pattern-recognition |
| 02/14/2008 | US20080034857 Low mass sensor for free point tool |
| 02/14/2008 | US20080034855 Sliding weight borehole gravimeter |
| 02/13/2008 | EP1887182A1 Thermal expansion matching for acoustic telemetry system |
| 02/13/2008 | EP1887181A1 Multi-sensor wireless telemetry system |
| 02/13/2008 | EP1885996A1 Method for detecting fluid leakage from a subterranean formation |
| 02/13/2008 | EP1885994A1 A device for selective movement of well tools and also a method of using same |
| 02/13/2008 | EP1774137B1 System for delivery of a tracer in fluid transport systems and use thereof |
| 02/13/2008 | CN101124489A Downhole positioning system |
| 02/13/2008 | CN101124383A Improved anchor arm for seismic logging tool |
| 02/13/2008 | CN101122994A Pipe inspection maintenance and fee determination method |
| 02/13/2008 | CN101122230A Tracing flow polymer-injected profile logging device, tracing agent and confection device and logging method |
| 02/13/2008 | CN101122229A Non-metal composite material insulator and metal bonding method dedicated for petrol logging instrument |
| 02/13/2008 | CN101122228A Down-hole forward looking phase controlled sound wave imaging method and imaging device |
| 02/12/2008 | US7328748 Thermal actuated plunger |
| 02/12/2008 | CA2461933C Determining fluid properties from fluid analyzer |
| 02/12/2008 | CA2321539C Inflow detection apparatus and system for its use |
| 02/12/2008 | CA2300004C Electronically controlled electric wireline setting tool |
| 02/12/2008 | CA2286018C High impact communication and control system |
| 02/12/2008 | CA2244558C Method and apparatus for suppressing drillstring vibrations |
| 02/08/2008 | CA2596174A1 Reduced-length measure while drilling apparatus using electric field short range data transmission |
| 02/07/2008 | WO2008016937A2 Device and method for combining oils with other fluids and mixtures generated therefrom |
| 02/07/2008 | WO2008016876A2 Fluid flowrate determination |
| 02/07/2008 | WO2008015430A1 Sensor system |
| 02/07/2008 | US20080033654 Correction of Multi-Component Measurements For Tool Eccentricity in Deviated Wells |
| 02/07/2008 | US20080031091 Thermal expansion matching for acoustic telemetry system |
| 02/07/2008 | US20080030366 Common interface architecture for horizontal directional drilling machines and walk-over guidance systems |
| 02/07/2008 | CA2657122A1 Fluid flowrate determination |
| 02/06/2008 | EP1883801A2 Methods and devices for analyzing and controlling the propagation of waves in a borehole generated by water hammer |
| 02/06/2008 | CN201016724Y Mine working face stand prop-setting angle measuring plate |
| 02/06/2008 | CN201016296Y Oil water well down-hole string corrosion scaling checking apparatus |
| 02/06/2008 | CN101120155A Integrated magnetic ranging tool |
| 02/06/2008 | CN101117887A Well dynamic liquid level auto detector |
| 02/05/2008 | US7327634 Rotary pulser for transmitting information to the surface from a drill string down hole in a well |
| 02/05/2008 | US7327144 Multi-frequency boring tool locating system and method |
| 02/05/2008 | US7325607 Methods and systems for using high-yielding non-Newtonian fluids for severe lost circulation prevention |
| 02/05/2008 | US7325605 Flexible piezoelectric for downhole sensing, actuation and health monitoring |
| 01/31/2008 | WO2008014039A2 System for communicating downhole information through a wellbore to a surface location |
| 01/31/2008 | WO2008012035A1 Methods and apparatus for micro-imaging |
| 01/31/2008 | US20080025148 Dynamic efficiency optimization of piezoelectric actuator |
| 01/31/2008 | US20080024319 System for communicating downhole information through a wellbore to a surface location |
| 01/31/2008 | US20080023328 Electro-chemical sensor |
| 01/31/2008 | US20080023196 Fluid flowrate determination |
| 01/31/2008 | US20080022763 Apparatus and Method for Fluid Flow Measurement with Sensor Shielding |
| 01/31/2008 | CA2658136A1 System for communicating downhole information through a wellbore to a surface location |
| 01/30/2008 | EP1882811A1 Shear coupled acoustic telemetry system |
| 01/30/2008 | EP1882810A1 Drill hole measuring device and rock drilling unit |
| 01/30/2008 | EP1882809A1 Methods and apparatus for micro-imaging |
| 01/30/2008 | CN201014062Y Novel ultralong tubule |
| 01/30/2008 | CN201013362Y Logging cable bridle |
| 01/30/2008 | CN201013361Y Borehole televiewer downhole instrument |
| 01/30/2008 | CN201013360Y Down-hole oil conduit returnable leakage checking device |
| 01/30/2008 | CN201013359Y Special device for pressure testing of fully-hydraulic controlled portable petroleum down-hole operation |
| 01/30/2008 | CN201013358Y Pump well liquid level tester |
| 01/30/2008 | CN201013357Y Direction-finding electrode array for petroleum exploration logging |
| 01/30/2008 | CN201013356Y Petroleum logging device aluminum alloy framework upper connector |
| 01/30/2008 | CN201013355Y High temperature high-pressure hydraulic type automatic balancing arrangement |
| 01/30/2008 | CN201013354Y Test rack |
| 01/30/2008 | CN201013353Y Counter electrode testing case |
| 01/30/2008 | CN201013352Y Remote automation control and data acquisition testing segregator system |
| 01/30/2008 | CN201013295Y Double-purpose antimagnetic mine mouth device |
| 01/30/2008 | CN101113945A Oil gas well high-energy gas air-pumping medicament experiment evaluating device |
| 01/30/2008 | CN101113673A Blowout preventer safety message data collecting device |
| 01/30/2008 | CN101113672A Formation testing tools bidirectional and variable direction delay device |
| 01/29/2008 | US7322416 Methods of servicing a well bore using self-activating downhole tool |
| 01/29/2008 | CA2533836C Method of ensuring that well tubing was properly stretched |
| 01/29/2008 | CA2497432C Shear wave velocity determination using multi-pole wave |
| 01/29/2008 | CA2487887C Tool module connector for use in directional drilling |
| 01/29/2008 | CA2466761C Optical position sensing for well control tools |
| 01/29/2008 | CA2330197C Downward communication in a borehole through drill string rotary modulation |
| 01/29/2008 | CA2284639C Subsurface measurement apparatus, system, and process for improved well drilling, control, and production |
| 01/29/2008 | CA2187422C Downhole production well control system and method |
| 01/24/2008 | WO2008010757A1 Arrangement and method for determining the position of a rock reinforcing bolt |
| 01/24/2008 | WO2007140313A3 Well cleanup tool with real time condition feedback to the surface |
| 01/24/2008 | WO2007051915A3 Device for carrying out magnetic imagery of the part of the subsoil bordering the wall of an oil well |
| 01/24/2008 | WO2007041516B1 Method and apparatus for formation evaluation and borehole size determination |
| 01/24/2008 | WO2007005637A3 Single sensor element positioned in multiple controlled orientations |
| 01/24/2008 | US20080021654 Automatic Adjustment of NMR Pulse Sequence to Optimize SNR Based On Real Time Analysis |
| 01/24/2008 | US20080019216 Method of Generating Directional Low Frequency Acoustic Signals and Reflected Signal Detection Enhancements for Seismic While Drilling Applications |
| 01/24/2008 | US20080017372 In situ process to recover heavy oil and bitumen |
| 01/24/2008 | US20080017371 Method and apparatus for restraining tubular members during well servicing |
| 01/23/2008 | CN201011301Y Experimental perforating tool simulating down-hole perforating condition |
| 01/23/2008 | CN101109280A Test device for down-hole drop ply position |
| 01/22/2008 | US7321293 Integrated magnetic ranging tool |
| 01/22/2008 | US7320370 Automatic downlink system |
| 01/22/2008 | US7320363 Energized slip ring assembly |
| 01/22/2008 | US7320252 Flow meter using an expanded tube section and sensitive differential pressure measurement |
| 01/22/2008 | CA2476720C Placing fiber optic sensor line |
| 01/22/2008 | CA2469444C Optical accelerometer or displacement device using a flexure system |
| 01/22/2008 | CA2417536C Apparatus for receiving downhole acoustic signals |
| 01/22/2008 | CA2386930C Positioning and conveying well apparatus and method |
| 01/22/2008 | CA2264090C Electrically insulating gap subassembly |
| 01/22/2008 | CA2147300C Downhole signal conveying system |
| 01/17/2008 | WO2007120933A3 Programmable data acquisition for tubular objects |
| 01/17/2008 | WO2007082014A3 Zone isolation assembly for isolating and testing fluid samples from a subsurface well |
| 01/17/2008 | WO2007053419A3 Logging system, method of logging an earth formation and method of producing a hydrocarbon fluid |
| 01/17/2008 | US20080013403 Telemetry transmitter optimization using time domain reflectometry |