| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 07/22/2004 | WO2004061268A1 Method for interpreting data measured in a hydrocarbon well in production |
| 07/22/2004 | WO2004061267A1 Method and system for circulating fluid in a well system |
| 07/22/2004 | WO2004028064A3 Electric submersible oil well pump communications |
| 07/22/2004 | WO2004005661A3 System and mehtod for automating or metering fluid recovered at a well |
| 07/22/2004 | WO2003098153A3 Downhole tool deployment safety system and methods |
| 07/22/2004 | WO2003071245A3 Pressure reading tool |
| 07/22/2004 | US20040141420 System and method for monitoring performance of downhole equipment using fiber optic based sensors |
| 07/22/2004 | US20040140810 Position and orientation locator/monitor |
| 07/22/2004 | US20040140809 Flux orientation locating in a drilling system |
| 07/22/2004 | US20040140097 Pressure reading tool |
| 07/22/2004 | US20040140092 Linear displacement measurement method and apparatus |
| 07/22/2004 | US20040140091 Method for determining direction to a target formation from a wellbore by analyzing multi-component electromagnetic induction signals |
| 07/22/2004 | US20040140090 Shock absorber |
| 07/22/2004 | US20040139791 Non-intrusive multiphase flow meter |
| 07/21/2004 | EP1240495A4 Improved method and apparatus for predicting the fluid characteristics in a well hole |
| 07/21/2004 | CN2627483Y Clevis pin type oil-water well pressure operation load display |
| 07/21/2004 | CN2627214Y Multiple parameter ultrasonic engineering logging device |
| 07/21/2004 | CN1514107A Oil well output pipeline fluid medium technological parameter collecting device and data treatment method |
| 07/20/2004 | US6766252 High resolution dispersion estimation in acoustic well logging |
| 07/20/2004 | US6763899 Deformable blades for downhole applications in a wellbore |
| 07/20/2004 | US6763889 Subsea intervention |
| 07/20/2004 | US6763887 Drill pipe having an internally coated electrical pathway |
| 07/20/2004 | US6763883 Method and apparatus for improved communication in a wellbore utilizing acoustic signals |
| 07/20/2004 | CA2380300C Electromagnetic antenna extension assembly and method |
| 07/20/2004 | CA2304323C Deployable sensor apparatus and method |
| 07/20/2004 | CA2252297C Plug release indication method |
| 07/15/2004 | WO2004059127A1 Dowhole chemical sensor and method of using same |
| 07/15/2004 | WO2004059126A1 Methods and apparatus for ultrasound velocity measurements in drilling fluids |
| 07/15/2004 | WO2004059125A1 Measuring mud flow velocity using pulsed neutrons |
| 07/15/2004 | WO2004059122A1 Method and system for cause-effect time lapse analysis |
| 07/15/2004 | WO2004044379A3 Downhole hydraulic control line connector |
| 07/15/2004 | WO2004044369A3 Method for reservoir navigation using formation pressure testing measurement while drilling |
| 07/15/2004 | WO2004001352B1 Apparatus and method of monitoring and signaling for downhole tools |
| 07/15/2004 | WO2003083248A3 Perforation method and apparatus |
| 07/15/2004 | US20040135075 Fiber optic based method and system for determining and controlling position of a sliding sleeve valve |
| 07/15/2004 | US20040134686 Boring tool tracking fundamentally based on drill string length, pitch and roll |
| 07/15/2004 | US20040134652 Subsurface signal transmitting apparatus |
| 07/15/2004 | US20040134081 Surveying of boreholes |
| 07/15/2004 | DE10149024B4 Verfahren zur Bestimmung physikalischer Größen von Grundwasser und Vorrichtung zur Durchführung des Verfahrens Method for determining physical quantities of groundwater and apparatus for carrying out the method |
| 07/14/2004 | EP1436488A1 Fluid skin friction sensing device and method |
| 07/14/2004 | CN2625844Y Integral hydraulic pressure controllable inclinometer |
| 07/13/2004 | US6762601 Non-invasive detectors for wells |
| 07/13/2004 | US6761574 Coiled tubing connector |
| 07/13/2004 | US6761230 Downhole drilling apparatus and method for using same |
| 07/08/2004 | WO2004038163A3 Drill pipe having an internally coated electrical pathway |
| 07/08/2004 | US20040133350 Digital pressure derivative method and program storage device |
| 07/08/2004 | US20040129923 traceable proppant composition for treating subterranean formation having multiple zones penetrated by well bore comprising particulate material and tracking material selected from metals, metal salts of organic acids, phosphorescent pigments, dyes |
| 07/08/2004 | US20040129874 Determining fluid chemistry of formation fluid by downhole reagent injection spectral analysis |
| 07/08/2004 | US20040129424 Instrumentation for a downhole deployment valve |
| 07/08/2004 | US20040129418 Use of distributed temperature sensors during wellbore treatments |
| 07/07/2004 | EP1435430A1 Measuring mud flow velocity using pulsed neutrons |
| 07/07/2004 | EP1435429A1 Method and system for cause-effect time lapse analysis |
| 07/07/2004 | EP1434980A1 Real-time on-line sensing and control of mineral scale deposition from formation fluids |
| 07/07/2004 | EP1434928A1 Magnetic signalling in pipelines |
| 07/07/2004 | EP1198655B1 Continuous wellbore drilling system with stationary sensor measurements |
| 07/07/2004 | EP1097290B1 Downhole well corrosion monitoring apparatus and method |
| 07/06/2004 | US6760275 High impact communication and control system |
| 07/06/2004 | US6759968 Method and apparatus for determining position in a pipe |
| 07/06/2004 | US6758277 System and method for fluid flow optimization |
| 07/06/2004 | US6758272 Apparatus and method for obtaining proper space-out in a well |
| 07/06/2004 | US6758271 System and technique to improve a well stimulation process |
| 07/06/2004 | CA2132787C Combination well logging device |
| 07/01/2004 | WO2004055324A1 Acoustical well radiator |
| 07/01/2004 | WO2004020789A3 Method and apparatus for logging a well using a fiber optic line and sensors |
| 07/01/2004 | WO2004001356A3 Technique and system for measuring a characteristic in a subterranean well |
| 07/01/2004 | WO2003087788A8 A method and apparatus for a downhole refractometer and attenuated reflectance spectrometer |
| 07/01/2004 | WO2002075164A8 Flexible joint for well logging instruments |
| 07/01/2004 | US20040128073 Formation evaluation through azimuthal measurements |
| 07/01/2004 | US20040128072 Self-calibrated ultrasonic method of in-situ measurement of borehole fluid acoustic |
| 07/01/2004 | US20040127185 Harmonic suppression for a multi-band transmitter |
| 07/01/2004 | US20040124994 High data rate borehole telemetry system |
| 07/01/2004 | US20040123645 Single tube densitometer |
| 07/01/2004 | DE10355079A1 Werkzeugstrang, Vorrichtung zum Isolieren von Signalen und Verfahren zum Verwenden eines Werkzeugstrangs Tool string apparatus for isolating signals, and method for using a tool string |
| 06/30/2004 | EP1434063A2 Drill string telemetry system and method |
| 06/30/2004 | CN1509369A Method and system for enhanced access to subterranean zone |
| 06/30/2004 | CN1155817C Heat transfer method for logging well |
| 06/29/2004 | US6757613 Graphical method for designing the trajectory of a well bore |
| 06/29/2004 | US6757218 Semi-passive two way borehole communication apparatus and method |
| 06/29/2004 | US6756784 Orientation sensor arrangement and method for use in a system for monitoring the orientation of an underground boring tool |
| 06/29/2004 | US6756783 Multi-frequency boring tool locating system and method |
| 06/29/2004 | US6755263 Underground drilling device and method employing down-hole radar |
| 06/29/2004 | US6755257 Drillpipe assembly and a method of deploying a logging tool |
| 06/29/2004 | US6755247 Fluid property sensors and associated methods of calibrating sensors in a subterranean well |
| 06/29/2004 | US6755079 Method and apparatus for determining fluid viscosity |
| 06/29/2004 | CA2333166C Generating commands for a downhole tool |
| 06/24/2004 | WO2004053284A2 Isolated electrical connection in a drill string |
| 06/24/2004 | US20040119607 Drill string telemetry system and method |
| 06/24/2004 | US20040118611 Drilling a borehole |
| 06/24/2004 | US20040118590 Conductor system |
| 06/23/2004 | EP1431510A2 Device for rotatably positioning and locking a drive shaft at one plurality of angular positions |
| 06/23/2004 | CN2621222Y Separately production pressure transmitting pressure measuring device |
| 06/23/2004 | CN2621221Y Blowout bottom sub for side-guide type water injection well protection environmental testing |
| 06/23/2004 | CN2621220Y Manometer casing pipe hanging device |
| 06/22/2004 | US6753791 Burst QAM downhole telemetry system |
| 06/22/2004 | US6752397 Redundant metal-metal seal |
| 06/22/2004 | CA2210587C Reinforced elastomeric bag for use with electric submergible motor protectors |
| 06/17/2004 | WO2004051402A2 Data recovery for pulse telemetry using pulse position modulation |
| 06/17/2004 | WO2004051054A2 Coiled tubing acoustic telemetry system and method |
| 06/17/2004 | WO2004032344A3 Battery conservation for downhole telemetry |
| 06/17/2004 | US20040116303 Resistivity imaging a formation during drilling a wellbore in formation with an electrically conductive oil-based drilling fluid, fluid comprising a polar ester oil-base, a sorbitan ester derivative surfactant, and an ethoxylated sorbitan ester |