Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 47 - Survey of boreholes or wells
Patents for E21B 47 - Survey of boreholes or wells (31,352)
10/2003
10/23/2003US20030196484 Method to quantify total raw coalbed desorbed gas volume from geophysical logs
10/23/2003CA2592638A1 Apparatus and method of detecting interfaces between well fluids and for detecting the launch of a device in oilfield applications
10/22/2003EP1355170A2 A method of controlling production from a wellbore
10/22/2003EP1355169A2 Method and apparatus for controlling chemical injection of a surface treatment system
10/22/2003EP1355168A2 A method for avoiding injection induced unintentional fracture growth
10/22/2003EP1355167A2 An injection well with a fibre optic cable to measure fluorescence of bacteria present
10/22/2003EP1355166A2 An injection evaluation system
10/22/2003EP1355038A1 Tracking of particulate flowback in subterranean wells
10/22/2003EP1354432A2 Data transmission in pipeline systems
10/22/2003EP1354127A1 Drilling signalling system
10/22/2003EP1354126A1 A pressure pulse generator
10/22/2003EP1354125A1 Pressure pulse generator for mwd
10/22/2003EP1354124A1 Method and system for enhanced access to a subterranean zone
10/22/2003EP1354118A2 Backreamer
10/22/2003CN2581693Y Tester for oil-water interface in well
10/21/2003US6636159 Borehole logging apparatus for deep well drillings with a device for transmitting borehole measurement data
10/21/2003US6634426 Determination of plunger location and well performance parameters in a borehole plunger lift system
10/21/2003US6634425 Instrumented cementing plug and system
10/21/2003CA2363981C Method and apparatus for communicating data in a wellbore and for detecting the influx of gas
10/21/2003CA2271156C Method of correcting wellbore magnetometer errors
10/16/2003WO2003036041A3 In situ recovery from a hydrocarbon containing formation using barriers
10/16/2003WO2003033857A3 Flow control mechanism for a downhole tool
10/16/2003US20030193662 Method and apparatus for a downhole refractometer and attenuated reflectance spectrometer
10/16/2003US20030193329 Magnetic sensor system useful for detecting tool joints in a downhold tubing string
10/16/2003US20030192708 Providing a conduit for an instrumentation line
10/16/2003US20030192695 Apparatus and method of detecting interfaces between well fluids
10/16/2003US20030192692 Method and system for wireless communications for downhole applications
10/16/2003US20030192691 In situ recovery from a hydrocarbon containing formation using barriers
10/16/2003US20030192690 Apparatus and method for detecting the launch of a device in oilfield applications
10/16/2003US20030192689 Fluid property sensors and associated methods of calibrating sensors in a subterranean well
10/15/2003EP1352151A1 Measuring the in situ static formation temperature
10/15/2003CN2580113Y Layered water injection underwell automatic reset two-way test seal section
10/14/2003US6633816 Borehole survey method utilizing continuous measurements
10/14/2003US6633236 Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters
10/14/2003US6633164 Measuring focused through-casing resistivity using induction chokes and also using well casing as the formation contact electrodes
10/14/2003US6631762 System and method for the production of oil from low volume wells
10/14/2003US6631563 Survey apparatus and methods for directional wellbore surveying
10/14/2003CA2366017C Downhole depth correlation
10/09/2003WO2003083262A1 Replaceable electrical device for drilling tool
10/09/2003WO2003083251A1 Method and device for detecting leaks in an annulus of a riser
10/09/2003WO2003083248A2 Perforation method and apparatus
10/09/2003WO2003036038A3 In situ thermal processing of a hydrocarbon containing formation via backproducing through a heater well
10/09/2003US20030188891 Two solenoid guide system for horizontal boreholes
10/09/2003US20030188867 Method and apparatus for orienting perforating devices
10/09/2003US20030188862 System and method for sensing and monitoring the status/performance of a downhole tool
10/08/2003EP1350340A1 Coupling signals to flowlines
10/08/2003EP1350309A2 Internal power source for downhole detection system
10/08/2003CN2578524Y Special bearing ring for orientation float inclinometer
10/08/2003CN2578523Y Six parameter well logging instrument
10/07/2003US6631327 Quadrupole acoustic shear wave logging while drilling
10/07/2003US6630947 Method for examining subsurface environments
10/07/2003US6629564 Downhole flow meter
10/02/2003WO2003080996A1 Method for determining the position of a drill head in the ground
10/02/2003WO2003080988A2 Drill head and method for controlled horizontal drilling
10/02/2003WO2003050385A3 Method and apparatus for completing a well
10/02/2003WO2002039143A9 Method and apparatus for lwd shear velocity measurement
10/02/2003US20030187582 Method of assaying downhole occurrences and conditions
10/02/2003US20030187581 Flux plane locating in an underground drilling system
10/02/2003US20030183423 Rotary control of rotary steerables using servo-accelerometers
10/02/2003US20030183390 Methods and systems for heating a hydrocarbon containing formation in situ with an opening contacting the earth's surface at two locations
10/02/2003US20030183385 Method and apparatus for integrated horizontal selective testing of wells
10/02/2003US20030183384 Replaceable electrical device for drilling tool
10/01/2003EP0991845B1 Earth formation surveying device
10/01/2003CN1445434A Device and method for automatic recognizing electroacoustic wave of pumping unit
10/01/2003CN1445432A Subdevice with changable module
09/2003
09/30/2003US6628206 Method and system for the transmission of informations by electromagnetic wave
09/30/2003US6626253 Oscillating shear valve for mud pulse telemetry
09/30/2003US6626252 Two solenoid guide system for horizontal boreholes
09/30/2003US6626251 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
09/25/2003WO2003024039A3 Power source regulation along a transmission line with feedback loop
09/25/2003WO2002055841B1 Well screen having a line extending therethrough
09/25/2003US20030179101 Drill string telemetry system
09/25/2003US20030178203 Deploying a cable through a guide conduit in a well
09/24/2003EP1347150A1 Apparatus with exchangeable modules
09/24/2003EP1149312A4 High-power well logging method and apparatus
09/24/2003EP1131534B1 Azimuth control of hydraulic vertical fractures in unconsolidated and weakly cemented soils and sediments
09/24/2003CN2575670Y Chemical process chemical composition real time on-line small size spectrum tester
09/24/2003CN2575302Y Arbor wheel type internal combustion engine
09/24/2003CN2575301Y High polymer chock awning top beam and plate shoe
09/24/2003CN2575300Y Rotary conductor for signals from underwell ultrasound imaging logging instrument
09/24/2003CN2575299Y Steering locating signal generator of steering gear for ultrashort radius radial level well system
09/24/2003CN2575298Y Drillhole pile holing hole diameter umbrella shape measuring gauge
09/24/2003CN1443921A Constant force actuator
09/23/2003US6624759 Remote actuation of downhole tools using vibration
09/23/2003US6622803 Stabilizer for use in a drill string
09/23/2003US6622792 Apparatus and method for improving multilateral well formation and reentry
09/18/2003WO2003076968A1 An apparatus and method for wellbore resistivity determination and imaging using capacitive coupling
09/18/2003WO2002071178A9 Improved bandwidth wireline data transmission system and method
09/18/2003US20030173115 Sub apparatus with exchangeable modules
09/18/2003US20030173113 Automated bore planning method and apparatus for horizontal directional drilling
09/18/2003US20030173079 Method for characterising parameters of wells, well bottom zone and formation, and device for carrying out said method
09/18/2003US20030173076 Constant force actuator
09/18/2003US20030173072 Forming openings in a hydrocarbon containing formation using magnetic tracking
09/18/2003US20030172752 Apparatus for the remote measurement of physical parameters
09/17/2003EP1344893A2 Constant force actuator
09/17/2003EP1344091A2 Rib-mounted logging-while-drilling (lwd) sensors
09/17/2003EP1200709B1 Method for determining a fluid contact level in a formation
09/17/2003EP1196743B1 Method and apparatus for determining flow rates
09/17/2003EP0974066A4 High impact communication and control system
09/17/2003CN2573674Y Layer testing magnetic sealing device for water injection well
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